GroupDIY

Project Specific Discussions => Filters/Equalizers => Topic started by: rainton on August 03, 2016, 08:41:06 AM

Title: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: rainton on August 03, 2016, 08:41:06 AM
Hey guys - I did it again  ;D

As some of you might know one of my recent projects was an authentic recreation of a vintage Pultec EQP-1A.
Just after I finished the EQP-1A I was so thrilled by the result that I decided I just had to build an MEQ-5 as well.

So I designed an authentic chassis and built one from scratch - as with my other recent projects I wanted to stay as close to the vintage units as possible, so I used mostly original components throughout the entire unit (such as original transformers, NOS Allen & Bradley pots, NOS RCA tubes , etc...)

During the group buy for the EQP-1A chassis I mentioned to some members, that I might do an MEQ-5 in the future and the feedback I got was I should definitely start a group buy for it as well...
...so, well - if there's indeed some interest  I will do a run.
But I'm sure you want to know what it will look like so here's some pics of my finished prototype:

front:

(http://i64.tinypic.com/1sjo5w.jpg)


back:

(http://i68.tinypic.com/izp2sz.jpg)

(http://i68.tinypic.com/8zfk9v.jpg)

also here's a little peak inside before I wired it all up:

(http://i67.tinypic.com/2up5jsi.jpg)

(http://i66.tinypic.com/1676pfd.jpg)

With this chassis you will be able to build an authentic replica of a vintage Pultec MEQ-5.
For those who don't want to use the original transformers - as alway there will be adapter plates available
to mount Sowter transformers instead :)

As with the past group buys the final pricing depends on how many chassis we get together here.
We have to be at least 10 - everything below is ridiculously expensive - so:

10-19 chassis would be: 225 EUR (excl. VAT if applicable)
20+ chassis would be:  195 EUR (excl. VAT if applicable)

All chassis would come with powder coated blue-grey front panel with white silk screening and powder coated similar to hammer finish dark grey back chassis.
All kits feature all cutouts  needed to build an authentic recreation of the "real thing" and includes the filter box (also powder coated) to be mounted to the back of the main chassis. All screw holes needed to put the chassis together are fitted with threaded inserts to allow for extremely easy assembly.
I have to add that due to "Pultec" being a registered trademark the front panel will only say: "Midrange Equalizer MEQ-5"

Even though this is an extremely simple circuit (the amp section is even much simpler than the EQP-1A) there's not much info on the web when it comes the wiring and layout of the components inside the chassis. So I will try to do a graphical layout that shows it all just like I'm doing it for my EQP-1A chassis at the moment. So even though it'S p2p, this is not a very complicated build...

Alright folks, let's see if there's enough interest.
And I'm still open for discussion (i.e. my prototype has a cutout for a screw terminal on the back just like the vintage units instead of XLRs, but for the EQP-1A the majority wanted cutouts for XLRs) so let me know what you think :)

Martin
P.S.: Yes my MEQ-5 sounds amazing  ;D


THE List: B)

LeRoux (2) PAID
Craig PAID
Quayhog  PAID
jpharaoh (2) PAID
Hugo (2) PAID
moltenwok (2) PAID
kosi 2 PAID
59flame (2)  PAID
jpalden (2) PAID
AusTex64 (2) PAID
Famap (2)  PAID
Knotty (2)  PAID
rainton PAID
 
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: Le Roux on August 03, 2016, 02:51:23 PM
Hi Martin,

That looks amazing!

Please sign me up for two!

Regards,
Neil
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: craig on August 03, 2016, 06:41:04 PM
Martin
i will  take one.

Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: nickhepfer on August 03, 2016, 08:31:07 PM
definitely interested in 2 !  ;)
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: Quayhog on August 05, 2016, 11:42:54 AM
I'd like one chassis.   Can you discuss custom drillings? (Fewer), is there room for XLR or is terminal strip the only option? 
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: rainton on August 07, 2016, 05:01:17 AM
I'd like one chassis.   Can you discuss custom drillings? (Fewer), is there room for XLR or is terminal strip the only option?

Yes we can discuss.
But since the chassis are made of solid steel I think it's not a good option to leave out the transformer cutouts completely because it's no fun drilling huge holes in there...

There's room for XLRs. And I guess that's what most people want, right?
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: rainton on August 12, 2016, 02:53:58 AM
We're at 6 chassis so far - including the one I'd take for myself it's 7.

So we still need some more people to make it happen.
This thread has only be open for a week a or so, so I can keep this open for a while to gather more interest but I'm thinking about setting a time frame?

Also I guess many people expect this project to be too complicated and difficult? It's actually one of the simplest p2p projects I did so far :)
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: Le Roux on August 12, 2016, 07:44:45 AM
Come on people!

Checkout this video of what this eq can do

https://www.youtube.com/watch?v=U3bhyfBt-DE&app=desktop
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: jpharaoh on August 14, 2016, 09:38:40 PM
I would like two.   I would like XLR connectors so my LA2A's and EQP-1A all match.  These all are top quality.  For future reference I will probably take two of anything rainton makes, awesome quality and picks the right kind of gear to make. 

Sometimes I don't check the forum as much as I should, so I am a little late in joining.
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: rainton on August 17, 2016, 11:46:18 AM
Come on people!

Checkout this video of what this eq can do

https://www.youtube.com/watch?v=U3bhyfBt-DE&app=desktop

Yes I love it!

It's so unbelievably smooth!
When I first used the 1.5K - 5K peak boost it was making it sound nicer around the selected frequency but it didn't sound like t was boosting that much, but when I checked the freq. response through a graph (with knob fully CW) I saw it was indeed boosting by 8db!!

I actually need a second one that's why I would also love to see this group buy happen :)


Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: rainton on August 20, 2016, 06:56:42 AM
I would like two.   I would like XLR connectors so my LA2A's and EQP-1A all match.  These all are top quality.  For future reference I will probably take two of anything rainton makes, awesome quality and picks the right kind of gear to make. 

Sometimes I don't check the forum as much as I should, so I am a little late in joining.

Thanks for the kind words!!  :)
So we're t least approaching 10 chassis...
...how long should I keep this feeler open to give everybody who's not checking the board on a daily basis  the chance to join?
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: Sinkia on August 20, 2016, 09:10:20 AM
Hi there !

I would definitly be interested for 1 !
count me in !!!
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: rainton on August 22, 2016, 12:13:32 PM
Hi there !

I would definitly be interested for 1 !
count me in !!!

OK great! So we're at 10 now :)
I'll give it until Sept. 15th and see if we can cross the 20 chassis mark - would be great for everyone!
I hope it's ok to wait for you guys?

Martin
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis OPEN until SEPT. 15th!!
Post by: Sinkia on August 23, 2016, 12:57:08 PM
I don't Know if it had been mentionned, but so you have an idea of the price for 1 Chassis Mark?
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis OPEN until SEPT. 15th!!
Post by: rainton on August 24, 2016, 10:44:59 AM
I don't Know if it had been mentionned, but so you have an idea of the price for 1 Chassis Mark?

It's mentioned in the first post ;)

Or do you mean how much it would cost if we only had one chassis made?
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis OPEN until SEPT. 15th!!
Post by: 59flame on September 01, 2016, 04:15:12 AM
Martin when will payment be required. i may be up for one or maybe 2?
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis OPEN until SEPT. 15th!!
Post by: rainton on September 01, 2016, 09:34:29 AM
Martin when will payment be required. i may be up for one or maybe 2?

Well, this thread is open until September 15th - I guess I would manage to get in touch within 1 week after that
and then collect the funds  in the week after...
...I don't know - personally I'm in no hurry, so one week more or less doesn't really matter to me. I don't know how the rest
of the group buy members thinks about that.

Fact is I can only place the order with the manufacturers when all funds are collected :)

So my guess is sometime last week of September - first week of October?
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis OPEN until SEPT. 15th!!
Post by: hugo on September 06, 2016, 10:25:15 PM
i take 2 of these beauties ...+knobs set, if you plan to make it.
Thank you
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis OPEN until SEPT. 15th!!
Post by: moltenwok on September 08, 2016, 02:50:20 PM
Yep in for 2 here too buddy
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis OPEN until SEPT. 15th!!
Post by: hanso on September 12, 2016, 05:22:50 AM
As a beginner, would it be completely stupid of me to join in on this one? I was of course planning on something a little easier, you know, like a complete kit with all parts included.

The guide you are planning to make, Martin, how detailed will it be? Will it be readable for a novice?
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis OPEN until SEPT. 15th!!
Post by: rainton on September 12, 2016, 06:20:49 AM
As a beginner, would it be completely stupid of me to join in on this one? I was of course planning on something a little easier, you know, like a complete kit with all parts included.

The guide you are planning to make, Martin, how detailed will it be? Will it be readable for a novice?

Hey Hanso,

the circuit itself - especially the amp circuit of the MEQ-5 is very simple.
But you could go to my White Market thread and check the wiring guide etc. of the EQP-1A and see if it's readable for you.
Then you can judge for yourself:

http://groupdiy.com/index.php?topic=63423.0

The EQP-1A has a more complex amp circuit compared to the MEQ5, so the latter should actually be a little bit easier to read.

But as Hugo said: It's a tube project and there's over 300V in some parts of the circuit compared to 30V in an 1176!
So it might indeed be a good idea to start with a well documented low voltage kit first.

BTW: We're at 16 chassis now - if we can get only 4 more chassis together there'll be a price drop for all of us!! So come on guys  ;)
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis OPEN until SEPT. 15th!!
Post by: hanso on September 12, 2016, 03:05:09 PM
Thank you very much Hugo and Martin! That sounds like excellent advice. I feel I need a little experience before I risk my life for a piece of tube gear.

I am kind of tempted to sign up for a chassis anyway, it's so beautiful! It can sit on the shelf for a while and I can get on with it when I'm ready... Will let you know about that.
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis OPEN until SEPT. 15th!!
Post by: kosi on September 12, 2016, 03:15:57 PM
I take one !
Don't know, when I have the time to build it, but I know, that I will come to a point, where I would really regret to pass on this offer.
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis OPEN until SEPT. 15th!!
Post by: 59flame on September 12, 2016, 06:42:00 PM
I'll take 2 had mentioned i might be interested in one ealier but had not committed. So 2 total for 59flame  thanks scot
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis OPEN until SEPT. 15th!!
Post by: Quayhog on September 12, 2016, 10:13:05 PM
Rainton's reproduction chassis' are very well done.  In case you have never seen one take it from me the quality is high.  Well worth the purchase.  This MEQ-5 will be my 4th build using his chassis. I'm already down for one.
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis OPEN until SEPT. 15th!!
Post by: hugo on September 13, 2016, 04:40:32 PM
Do you plan to make the HLF-3c ?..my pultec collection would be "complete" !
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis OPEN until SEPT. 18th!!
Post by: rainton on September 13, 2016, 06:24:03 PM
Do you plan to make the HLF-3c ?..my pultec collection would be "complete" !

If we can gather enough interest why not. But I believe could be a little more difficult to find enough people...

I'll extend the feeler until the weekend - we're at 17 or 18 chassis right now - we're so close to the next price drop!

hopefully we can reach the magic 20!

Martin
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis OPEN until SEPT. 18th!!
Post by: rainton on September 13, 2016, 06:33:54 PM
BTW: here's a little peak into my unit using my prototype chassis:

(http://i65.tinypic.com/ojpd8n.jpg)
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis OPEN until SEPT. 15th!!
Post by: hugo on September 13, 2016, 09:56:33 PM
Thank you very much Hugo and Martin! That sounds like excellent advice. I feel I need a little experience before I risk my life for a piece of tube gear.

I am kind of tempted to sign up for a chassis anyway, it's so beautiful! It can sit on the shelf for a while and I can get on with it when I'm ready... Will let you know about that.

Just to have no regrets when you will want stereo  operations, make like me, just take 2 of them ! ^^
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis OPEN until SEPT. 18th!!
Post by: Knotty on September 14, 2016, 02:30:08 PM
Put me down for 2! Hopefully that puts us over the 20 mark :D
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis OPEN until SEPT. 18th!!
Post by: jpalden on September 15, 2016, 05:11:57 AM
2 for me as well, please.
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis OPEN until SEPT. 18th!!
Post by: rainton on September 15, 2016, 11:53:40 AM
Alright guys,


that makes it 21  :D
WE MADE IT!!!

I'll still keep this feeler open until Sept. 18th - so whoever thought about joining us, better do it soon  ;)

Martin
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis OPEN until SEPT. 18th!!
Post by: rainton on September 17, 2016, 03:42:19 PM
Last call guys - tomorrow night this feeler will close for good ;)

Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis OPEN until SEPT. 18th!!
Post by: hugo on September 17, 2016, 04:33:20 PM
I can not believe there are less than 20 peoples involved in this crazy product...it does not make any sense
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis OPEN until SEPT. 18th!!
Post by: AusTex64 on September 18, 2016, 02:15:43 AM
Martin, I'm real close to taking two. I assume you used Vintage Windings inductors? And how difficult is it to get those wafer switches for freq selection? Thanks!
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis OPEN until SEPT. 18th!!
Post by: hugo on September 18, 2016, 04:14:39 AM
Martin, I'm real close to taking two. I assume you used Vintage Windings inductors? And how difficult is it to get those wafer switches for freq selection? Thanks!

Very simple to find them on ebay very very cheap from army stock of eastern europe. These are ceramic rotary switches NOS you have to search
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis OPEN until SEPT. 18th!!
Post by: rainton on September 18, 2016, 05:47:02 AM
Martin, I'm real close to taking two. I assume you used Vintage Windings inductors? And how difficult is it to get those wafer switches for freq selection? Thanks!

Hey Robert,

As Hugo mentioned already the ceramic rotary switches are still very easy to obtain and pretty cheap as well.
You could either go for russian military switches like this one here:

http://www.ebay.com/itm/2-POLE-11-POSITIONS-RUSSIAN-UNSHORTING-CERAMIC-ROTARY-SWITCH/282176868339?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D39218%26meid%3D07b6f1c3bc7e41dfa7b77345d2c396b8%26pid%3D100005%26rk%3D2%26rkt%3D6%26sd%3D282034126061

Or since you're in the US you could also look for US-made NOS CENTRALAB  ceramic switches.
That's what was used in the vintage units, but they're more expensive and especially for buyers outside of US it makes little sense to go with them, since the russian made ceramic switches are pretty much identical to the Centralabs but way cheaper.

BTW - I received your message Robert but haven't found time yet to get back to you. I think your findings are extremely interesting and could be very valuable for the DIY community!! Maybe you should share some of it in my EQP-1A discussion thread and/or in the FB group (more info on that is to be found in the EQP-1A thread as well)
I will still try to respond to your message in full length as soon as I can :)

Martin
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis OPEN until SEPT. 18th!!
Post by: AusTex64 on September 18, 2016, 03:14:40 PM
Martin, I'll buy two chassis. Will regret it later if I don't.
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis CLOSED!
Post by: rainton on September 19, 2016, 06:14:16 AM
Feeler closed.

I will get in touch with all group buy members soon :)
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis CLOSED!
Post by: rainton on September 28, 2016, 06:27:01 PM
I updated the first post with a list of those who are part of the group buy.

All group buy members should be notified by now. If for whatever reason you haven't received a notification letter from me, please get in touch with me!

As soon as everybody has paid his share, I'll place the order with the manufacturer :)

Martin
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis CLOSED!
Post by: hugo on October 01, 2016, 11:33:47 PM
Please all pay what you ordered....we are all waiting for this ^^
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis CLOSED!
Post by: moltenwok on October 02, 2016, 12:29:55 AM
Sorry guys -2more days I've got 329 to go for the eqp 1's as well as its last chance to get them
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis CLOSED!
Post by: 59flame on October 02, 2016, 04:05:36 PM
already paid not posted though
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis CLOSED!
Post by: rainton on October 02, 2016, 04:22:32 PM
Sorry guys,

I'm on family vacation at the moment - so not online too often.
Thread updated. Only one member missing now.

I tried to reach Sinkia already - hope to hear back from him within the next two days - otherwise we'll have to proceed without him I'm afraid...
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis CLOSED!
Post by: hugo on October 03, 2016, 02:23:21 PM
already paid not posted though

Maybe i understood bad your post...but here is a feeler..so everybody have to wait for the production. As always for that type of project, shipping can take several months..
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis CLOSED!
Post by: rainton on October 05, 2016, 03:34:20 PM
Alright guys,

we're in production :)

Sinkia and another member pulled back, so there are 3 chassis available to whoever wants them first.
Just let me know.
From my experience in the past we have to calculate 5-6 weeks until the chassis are finished.

I'll keep you posted as soon as there's news!

Martin
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis - 3 CHASSIS STILL AVAILABLE!
Post by: kosi on October 05, 2016, 03:53:04 PM
okay,
I take another one, I already sent an email

have a nice holiday,
andreas
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis - 3 CHASSIS STILL AVAILABLE!
Post by: jpharaoh on October 08, 2016, 01:12:31 PM
Excited about the build and I am starting to look into ordering parts.  Can someone point to me to the where I can find the schematic and if possible a BOM?  I haven't been as successful finding info on this project as on other ones.  I found a couple of schematics but since I have never seen the original I don't know if they are true to the design.  Thanks for the help.  Just want to make sure I order the correct Transformers and etc.
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis - 3 CHASSIS STILL AVAILABLE!
Post by: rainton on October 08, 2016, 01:32:24 PM
Excited about the build and I am starting to look into ordering parts.  Can someone point to me to the where I can find the schematic and if possible a BOM?  I haven't been as successful finding info on this project as on other ones.  I found a couple of schematics but since I have never seen the original I don't know if they are true to the design.  Thanks for the help.  Just want to make sure I order the correct Transformers and etc.

Give me some time - it will all be available before the chassis are ready ;)
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis CLOSED!
Post by: wmarden on October 29, 2016, 03:24:19 PM
Alright guys,

we're in production :)

Sinkia and another member pulled back, so there are 3 chassis available to whoever wants them first.
Just let me know.
From my experience in the past we have to calculate 5-6 weeks until the chassis are finished.

I'll keep you posted as soon as there's news!

Martin

Do you still have one extra available? I would love to get one...
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis - 2 CHASSIS STILL AVAILABLE!
Post by: rainton on November 17, 2016, 11:24:00 AM
Good news everyone!!

The chassis arrived!
Unfortunately I missed to have one chassis shipped here to my place as all other chassis are going directly to my friend Aaron @ Don-Audio where they'll be prepared for shipping.
So I can't tell much about how they turned out yet - but:

a) Tomorrow Aaron will do the quality check for me

b) I didn't miss to have some of the front panels shipped here from the silkscreened's and they look perfect!!
The powder coating, print and everything. So based on that I guess the back chassis will be of the same quality  8)

I'm sending out the screws and everything necessary to complete the kits to Don-Audio and I'm positive we can start shipping them out on MONDAY!!

Hooray!!

Martin
(http://i67.tinypic.com/2wlr57m.jpg)
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis - 2 CHASSIS STILL AVAILABLE!
Post by: kosi on November 17, 2016, 05:33:14 PM
fantastic !!!
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis - 2 CHASSIS STILL AVAILABLE!
Post by: AusTex64 on November 19, 2016, 10:31:41 PM
Martin, any idea when you might have some BOM info so I can starts sourcing parts? Thanks!
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis - 2 CHASSIS STILL AVAILABLE!
Post by: rainton on November 20, 2016, 02:24:31 AM
Martin, any idea when you might have some BOM info so I can starts sourcing parts? Thanks!

I'm working on it Robert - hopefully I can finish it during the course of next week :)
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis - 2 CHASSIS STILL AVAILABLE!
Post by: AusTex64 on December 04, 2016, 11:40:37 AM
I received an email from Don Audio last week saying the chassis have shipped. Look forward to getting them.
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis - 2 CHASSIS STILL AVAILABLE!
Post by: rainton on December 06, 2016, 05:27:01 PM
I received an email from Don Audio last week saying the chassis have shipped. Look forward to getting them.

Yes - all chassis have shipped - let me know when you get them and how you like it :)

Martin

BTW: I have some original Dakaware Pultec frequency selection knobs left over - I was about to post in the Black Market,
but if someone here wants them -  EUR 6.00 ea. + shipping gets them.
At Don-Audio they're more than EUR 10.00 ea. ;)

I have 10 left.

Martin
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis - 2 CHASSIS STILL AVAILABLE!
Post by: kosi on December 06, 2016, 05:30:05 PM
I take 6 !
I'll send a pm

and yes, the chassis arrived, superb as usual  ;D
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis - 2 CHASSIS STILL AVAILABLE!
Post by: rainton on December 06, 2016, 06:11:41 PM
I take 6 !
I'll send a pm

and yes, the chassis arrived, superb as usual  ;D

Great to hear you like the chassis!! :)

6 knobs for kosi - 4 left.
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis - 2 CHASSIS STILL AVAILABLE!
Post by: AusTex64 on December 07, 2016, 12:03:23 AM
Martin, any news on a layout drawing and BOM? Thanks!
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis - 2 CHASSIS STILL AVAILABLE!
Post by: hugo on December 20, 2016, 11:52:05 AM
Will the hammond 370jx fit the holes of the chassis ? too late, it is ordered...really impatient to order all other parts ^^
Thank you
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis - 2 CHASSIS STILL AVAILABLE!
Post by: AusTex64 on December 26, 2016, 11:24:32 PM
Received the chassis. They are very nice.

Martin, was waiting for Christmas to pass. Any hope to see a layout/wiring drawing and maybe a BOM anytime soon? Thank you very much!
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis - 2 CHASSIS STILL AVAILABLE!
Post by: rainton on December 29, 2016, 09:49:52 AM
Received the chassis. They are very nice.

Martin, was waiting for Christmas to pass. Any hope to see a layout/wiring drawing and maybe a BOM anytime soon? Thank you very much!

Sorry Robert,

I didn't make it before Christmas because I simply had so much work at the studio.
I'm on vacation with my family until Jan 6th but I'll try to finish it when I'm back

Martin
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis - 2 CHASSIS STILL AVAILABLE!
Post by: AusTex64 on December 29, 2016, 07:29:35 PM
Martin,

No need to apologize. Totally understand about the season and work.

FWIW, I plan to use the Carnhill inductors sold by Colin at AML for my build, given my experience with bulding my EQP-1A clones with other inductors.

Happy New Year,

Robert Mokry
Austin, TX
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis - 2 CHASSIS STILL AVAILABLE!
Post by: thakava on January 02, 2017, 10:58:46 AM
Hi!

Any still left?
I´d like one...


Best,
Tom
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis - 2 CHASSIS STILL AVAILABLE!
Post by: rainton on January 02, 2017, 03:06:29 PM
Hi!

Any still left?
I´d like one...


Best,
Tom

Hey Tom,

I have one last one left - I'll PM you  ;)
Martin
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis - 1 CHASSIS STILL AVAILABLE!
Post by: zodiaque on January 13, 2017, 03:41:05 AM
hi martin,
is the last one still available or are they all gone?
cheers
peter
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis - 1 CHASSIS STILL AVAILABLE!
Post by: Knotty on January 17, 2017, 09:20:27 PM
I never received my chassis :/ are some of them still on transit?
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis - 1 CHASSIS STILL AVAILABLE!
Post by: rainton on January 18, 2017, 02:18:14 AM
I never received my chassis :/ are some of them still on transit?

I'll check it asap  Aaron
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis - 1 CHASSIS STILL AVAILABLE!
Post by: rainton on January 18, 2017, 03:49:03 AM
I never received my chassis :/ are some of them still on transit?

It's still in transit - I'll PM you the tracking number, but should arrive very soon :)

Martin
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis - 1 CHASSIS STILL AVAILABLE!
Post by: AusTex64 on January 26, 2017, 09:06:44 PM
Does anyone have a wiring diagram or any BOM info? Thanks.
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis - 1 CHASSIS STILL AVAILABLE!
Post by: kosi on January 27, 2017, 04:20:02 AM
Here you go :
http://www.vintagewindings.com/gen%20pop/8299543VW8335/ProAudio1/Pultec%20MEQ5%20Manual.pdf

or just google "Pultec MEQ5 Manual" this is the version with solid state recification.

there's also a version with tube rectification, I attach it here. Bom is easy to do yourself, there's also one in the facebook group.
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis - 1 CHASSIS STILL AVAILABLE!
Post by: AusTex64 on January 27, 2017, 05:09:01 PM
Thanks Kosi!

Is the Facebook group for the EQP-1, or is there another one for the MEQ-5?
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis - 1 CHASSIS STILL AVAILABLE!
Post by: kosi on January 27, 2017, 08:06:41 PM
It's for all of raintons chassis. LA2A, EQP1A and MEQ5.
Meanwhile, there's a lot of info. Over 100 members.
Only problem for me: I'm not a Facebook fan... 
But have a look, it's free !
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis - 1 CHASSIS STILL AVAILABLE!
Post by: AusTex64 on January 28, 2017, 11:42:30 PM
Kosi, I'm not a FaceBook fan either. I don't have a FB account so I can't see the page. :-(
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis - 1 CHASSIS STILL AVAILABLE!
Post by: rainton on February 02, 2017, 09:53:42 AM
Guys!
Sorry for the long silence - I just got so much work at the moment!

Finally I managed to finish the graphic layout for the MEQ-5 and it's available now for download here:  :)

EDIT: New revision 1.1: http://www.mediafire.com/file/fv84voidzkqakhq/raintons_MEQ-5_layout_rev1_1.pdf

It was more work then I expected even though I did pretty much the same thing for the EQP-1A already...I think I simply forgot
how much work it was ;)

As always it's done to my best knowledge but mistakes can happen, so if you find any please let me know asap.
Next up is the BOM - I'm working on it.

hang in there

P.S.: If you follow the layout you probably won't need an extra BOM - the circuit is pretty simple - even though it might appear differently at first sight...  ;D

Martin
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis - 1 CHASSIS STILL AVAILABLE!
Post by: AusTex64 on February 03, 2017, 12:41:00 AM
Awesome!!! Thanks Martin!
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis - 1 CHASSIS STILL AVAILABLE!
Post by: rainton on February 03, 2017, 02:17:49 AM
Kosi found 1 mistake:

The resistor connected to the 2.5k rev log pot is supposed to be 270R - not 270K!

I'll update the layout later this morning ;)

Thanks Kosi!
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis - 1 CHASSIS STILL AVAILABLE!
Post by: rainton on February 03, 2017, 04:14:58 AM
layout updated :)

latest revision: 1.1

http://www.mediafire.com/file/fv84voidzkqakhq/raintons_MEQ-5_layout_rev1_1.pdf

I'll remove the old link...

Martin
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: Darkhyrys on February 13, 2017, 09:52:45 AM
hi,
Is that normal the 4 back box chassis screws don't fit the 4 holes?
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: rainton on February 13, 2017, 10:00:29 AM
hi,
Is that normal the 4 back box chassis screws don't fit the 4 holes?

No - you'd be the first one out of all Pultec style chassis kits out there.

I sent you a mail already - please send me some pics so I understand what we're talking about.
Is it the screw holes that mount the base of the filter unit to the box, or is it the filter unit not fitting the main chassis?

If the latter I suspect Don-Audio might have sent you an EQP-1A style filter box for your MEQ-5 style chassis  ::)

Thanks
Martin
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: Darkhyrys on February 14, 2017, 10:25:08 AM
Issue fixed ! ... Thanks Martin
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: rainton on February 17, 2017, 11:35:57 AM
Guys!!
Finally I was able to finish my rev 1.0 of the BOM.
As always - it's made to the best of my knowledge, but mistakes can occur - so if you find any - please let me know :)

http://www.mediafire.com/file/u65fdad0maqdp6c/raintons_Pultec_MEQ-5Parts_List_rev.1_0.pdf

Thanks!
Martin
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: Darkhyrys on February 18, 2017, 08:39:00 AM
I'm a newbie so could you tell, for exemple what TYPE of resistor, what POWER RATING and what TOLERANCE? Because Mouser for exemple gives thousand references :( :( :(
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: Darkhyrys on February 18, 2017, 10:12:16 AM
I'm a newbie so could you tell, for exemple what TYPE of resistor, what POWER RATING and what TOLERANCE? Because Mouser for exemple gives thousand references :( :( :(

Well, actually the confusion is not only with resistors but all components :( :(  I really don't know what and where to buy ??!! Damned, I'm blowing my mind on this !!!! Too many references. Arf :(
Does somebody made an explicit BOM with items reference numbers? I would make a statue of that guy in my garden ;)
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: rainton on February 18, 2017, 11:14:17 AM
In terms of resistors, in the amp and filter section you can take 0.5W carbon comps (more like the original) or metal film (more modern)

Except that one 5W resistor specified in the BOM and layout

In the power supply all Wattages are specified - here you can take carbon comp or if you want less drift metal oxide

All caps in the filter circuit can be 200V or probably even less.

For the rest if not specified choose 500V or above and your on the safe side.

I don't like to add mouser numbers to the BOM since for many people Mouser is not the best option.

Since you're in Europe i would choose Banzaimusic for resistors caps etc.
Much cheaper than mouser and easier to find the right components faster ;)
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: Darkhyrys on February 18, 2017, 11:43:12 AM
Martin !!! You're the king !!
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: Darkhyrys on February 20, 2017, 04:59:23 AM
Hi there,
If somebody has succed in building his MEQ-5, could he share close pics of his work ???
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: Darkhyrys on February 22, 2017, 06:05:20 AM
Hi again,
It's writted on the BOm that we need 2 x 0,2 uf and 2 x 0,47 uf in the low filter section. But on the layer, I only see one of each. What am I missing?
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: rainton on February 22, 2017, 06:08:40 AM
Hi again,
It's writted on the BOm that we need 2 x 0,2 uf and 2 x 0,47 uf in the low filter section. But on the layer, I only see one of each. What am I missing?

That's obviously a typo - you only need 1 each ;)
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: rainton on February 22, 2017, 06:13:24 AM
BOM updated - latest revision: 1.01

Thanks for letting me know :)

http://www.mediafire.com/file/7bpp4bbu540412h/raintons_Pultec_MEQ-5Parts_List_rev.101.pdf
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: Darkhyrys on February 22, 2017, 06:42:39 AM
ok, same thing with the 0,22uf in the mid filter section.

you write on the BOM we need a 0,33uf/200V cap for the power supply but it's writted 0,3uf on the layer.
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: rainton on February 22, 2017, 07:15:52 AM
ok, same thing with the 0,22uf in the mid filter section.

you write on the BOM we need a 0,33uf/200V cap for the power supply but it's writted 0,3uf on the layer.

Right about the 0.22uf - I updated rev. 1.01

Regarding the 0.33uf cap - 0.33uf IS a 0.3uf cap ;)

It's just one more decimal written - all 0.3uf caps I've seen so far are essentially 0.33uf - the next step would be 0.39 and one step down would be 0.27.

So as far as I know there's no 0.30uf cap  ???
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: AusTex64 on March 29, 2017, 07:06:44 PM
Hi Martin,

I'm trying to find a proper Switchcraft 4PDT switch that's latching, like the one you used and is depicted in the layout drawing. Do you have a model number of the one used on MEQ-5? I have a couple of DPST Televers suitable for EQP-1A, but they won't work here. :-(

Thank you!
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: rainton on March 29, 2017, 07:36:38 PM
Hi Martin,

I'm trying to find a proper Switchcraft 4PDT switch that's latching, like the one you used and is depicted in the layout drawing. Do you have a model number of the one used on MEQ-5? I have a couple of DPST Televers suitable for EQP-1A, but they won't work here. :-(

Thank you!

Hey Robert,

actually all these Switchcraft Telever (16000 series) switches can be made latching.
I was wondering the same thing too back then.

They are all momentary, but there's a small metal plate on these switches - held by a screw. remove it and it will be latching ;)
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: AusTex64 on March 30, 2017, 12:34:55 AM
Did some research and figured out Switchcraft Telever 160012 should work. 4 pole, double throw.  Martin, is this what you used? Thanks.
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: rainton on March 30, 2017, 03:14:26 AM
Did some research and figured out Switchcraft Telever 160012 should work. 4 pole, double throw.  Martin, is this what you used? Thanks.

Don't know the exact item number but yes, 4 pole double throw :)
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: AusTex64 on April 03, 2017, 03:11:26 PM
The in/out switch appears to be Switchcraft Telever 160012.

Here's a lead for my fellow MEQ-5 builders - this guy sold me two of these for $25 each. Arrived today, very clean. He has 8 left.

http://www.ebay.com/itm/Switchcraft-Lever-Switch-160012-/381673848739?hash=item58dd88bfa3:g:clIAAMXQTT9RqLxr
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: Knotty on April 13, 2017, 12:34:09 AM
you know, I just got to thinking. I've built(Drip) and worked on pultecs before. But i've never opened one of the filter boxes. How is that stuff all stuffed in there? How is it all arranged?
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: AusTex64 on April 13, 2017, 01:31:10 PM
you know, I just got to thinking. I've built(Drip) and worked on pultecs before. But i've never opened one of the filter boxes. How is that stuff all stuffed in there? How is it all arranged?

Here's some info http://www.vintagewindings.com/tech%20swag/Pultec-Facts-&-Fiction.pdf

They basically suspended the components in the can filled with melted wax. Which it appears had a tendency to deform or melt the caps to some extent. This concerns me, even though obviously a bunch of units were built like this by the original Pulse Techniques, and tons are still working.

GDIY member Gridcurrent suggested using a piece of perfboard to mount the components to, then attach it to the filter box somehow. That's what I'm going to do on my upcoming MEQ-5 builds. Might also use the spray foam used for sealing cracks on a house to fill the can and reduce any rattling.
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: rainton on April 24, 2017, 05:29:35 AM
another mistake in the layout found and solved - latest revision is 1.2

http://www.mediafire.com/file/cn5t2z828h8n6ax/raintons_MEQ-5_layout_rev1_2.pdf


Thanks!!
Martin
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: AusTex64 on May 02, 2017, 05:42:27 PM
Martin,

On the CE metal can caps, did you use insulators in addition to the metal mounting plates? I can't really tell from the chassis pics.

Thanks.
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: rainton on May 02, 2017, 05:47:06 PM
Martin,

On the CE metal can caps, did you use insulators in addition to the metal mounting plates? I can't really tell from the chassis pics.

Thanks.

The negative side of these caps has to be grounded to chassis ground.
You can either do that by using a metal mounting plate and scraping off a little bit of the powder coating underneath to provide continuity,
or you can use either a metal mounting plate or an insulator mounting plate - whatever you have at hand and connect one of the negative pins of the cap to one of its mounting screws...
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: AusTex64 on May 03, 2017, 03:08:06 PM
Thanks bro, you're a peach.
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: vitopower on November 25, 2017, 03:29:33 PM
does anyone have a source for 2k5 rev log and lin?
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: kosi on November 25, 2017, 05:28:53 PM
I bought this one, works tiptop

https://www.ebay.co.uk/itm/C2K5-2-5K-Reverse-Log-Potentiometer-with-Flatted-6mm-Shaft-Mono-Anti-log-Pot/111423921945?hash=item19f1621f19:g:sPUAAOSw7NNT2koq

Mouser has also one

https://www.mouser.de/ProductDetail/TT-Electronics/P160KN-0FC18C2K5/?qs=%252bUYXD5bnyXr1QMpLnwE2%252bA%3d%3d
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: AusTex64 on November 27, 2017, 09:40:57 PM
Thanks Kosi!
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: vitopower on November 27, 2017, 10:52:36 PM
Yeah, thanks for super quick reply, Kosi! 
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: AusTex64 on January 15, 2018, 08:12:27 PM
what did you guys use for the output transformer? Not many options for a 5:1 that will fit. The Sowter is a bit too big. Triads are hard to find and outrageously expensive. A-24 isn’t far behind. The Cinemag is too big too. It’s a pretty tight fit on that chassis.
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: moltenwok on January 16, 2018, 07:14:05 PM
Before I found a nos pair of hs~50   I was going to use the jensen Jt_~10k61~1m output transformers
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: 59flame on January 16, 2018, 08:45:33 PM
went with Altec 15095A 's on mine.
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: AusTex64 on February 19, 2018, 09:59:48 PM
Finally getting around to these...

Where did you find the 0.17uf caps? Mouser doesn't have them. I've also searched 170000pf and 17nf. 

Thanks!
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: rainton on February 22, 2018, 06:52:45 AM
Finally getting around to these...

Where did you find the 0.17uf caps? Mouser doesn't have them. I've also searched 170000pf and 17nf. 

Thanks!

Hey Rob,

just make your own 0.17uf caps by putting 2 caps in parallel...like one 0.15uf + 0.02uf ;)

But depending on which coils you use I would leave the filter can open and measure - so you can tweak for sound and freq. while you're at it  ;)

Good luck!
Martin
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: AusTex64 on March 04, 2018, 08:45:58 PM
Love you Martin, but you obviously have a lot more time on your hands and motivation than I. :-)

I want to make music first and foremost. I will admit I’m also lazy. If you’ve done the work of listening to caps in all those positions, by all means please post a Mouser shopping cart and make my life easier!!!

Regarding the 0.17uf cap, I think a single part will have less phase shift than paralleled values. I’ve also been suspicious of bypassing caps for the same reason. I ended up buying 13 pcs of 0.17uf to get the two I need. Will be posting the others on eBay,  or PM me here if any of you guys you need some.
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: AusTex64 on March 05, 2018, 01:51:26 PM
BTW, what gauge wire did you guys use on the filter unit that will allow 36 conductors to fit through the hole in the filter box and chassis? Is 26 gauge too big?
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: hugo on May 26, 2018, 06:13:08 PM
BTW, what gauge wire did you guys use on the filter unit that will allow 36 conductors to fit through the hole in the filter box and chassis? Is 26 gauge too big?

I went with 22awg everywere at the filters. Originals seems to have 22 or even 20awg there (i can say bullsh*t, it is just regarding the pictures on the internet).
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: letterbeacon on June 11, 2019, 03:09:07 PM
Hey Robert,

actually all these Switchcraft Telever (16000 series) switches can be made latching.
I was wondering the same thing too back then.

They are all momentary, but there's a small metal plate on these switches - held by a screw. remove it and it will be latching ;)

I bought this non- latching Switchcraft switch from ebay. Is there a way to make this latching? I can't work it out...
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: AusTex64 on June 11, 2019, 05:03:24 PM
There's usually a little plate on the top held on by a screw. Using or not using this part determines whether the switch will latch or not. I can only see one side of the switch so I assume it's missing.
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: kosi on June 12, 2019, 07:13:38 AM
they look like this
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: letterbeacon on June 12, 2019, 09:10:15 AM
Thanks for your replies.

Is that picture taken from behind the switch? I don't have the switch with me to check, but I have found this photo I took of it the other day from a different angle...
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: kosi on June 13, 2019, 06:32:41 AM
It's unfortunately the wrong one...
In my picture, which is from behind, , you see this clip, which says: non lock. If you leave it away, you have a latching switch. It's simple mechanics. Here's a pic from the side, without the little plate
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: letterbeacon on June 13, 2019, 06:17:00 PM
Oh, that’s a bit annoying! Thanks for letting me know!
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: ron_swanson on June 19, 2019, 06:47:19 PM
Oh, that’s a bit annoying! Thanks for letting me know!

Letterbeacon,

I have 4 x160012 in the post supposedly scheduled to be delivered tomorrow. Assuming I’m getting what I was promised,  you’re welcome to purchase one.  They were a bit on the pricey side and of course, I’m in the US so there’s shipping to consider too.

Let me know if you’re interested?   We’ll try to work something out.

Greg
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: ron_swanson on July 25, 2019, 01:42:01 PM
Anyone have or know where I can find internal pictures of a real MEQ-5 or of their close constructed clone they care to share?  I'd love to see how the capacitors and inductors wehre mechanically laid out and / or fastened.  My Google searching skills must be off as I can't find much of anything.

Thanks in advance!

Greg
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: Jeremy.Starseed on July 30, 2019, 01:09:17 PM
 225 EUR (excl. VAT if applicable)
20+ chassis would be:  195 EUR (excl. VAT if applicable)

If the price drops to 195 I would be interested in 2.
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: TillM on July 30, 2019, 03:41:56 PM
Little too late. You can already buy them from Martin.
www.analogvibes.com
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: ron_swanson on August 28, 2019, 11:00:15 AM
Finished my MEQ0-5 build last night.  All seems to be working as expected.  Yay!

Checked all voltages marked on the schematic I have.  No issues.  No distortion, buzzes, hums or other artifacts found or being presented so far...

I inadvertently wired the bypass switch backwards - off was on, on was bypass, so had to re-wire that, but after making that fix, the unit sounds amazing!

My first point-to-point build...

My capacitor planning / execution leaves a little to be desired.  Might re-look at that.  It wasn't clear to me where or how the caps and inductors were mounted in vintage units, so I ended up throwing caution to the wind. 

That aside, I used a vintage Triad HS-56 input transformer (had three of these in my parts cabinet), but so far haven't found a HS-50, so using a Sowter 1290 that I ended up mounting internally. 

The bypass switch is a NOS Switchcraft and the frequency rotary switches are ceramic NOS parts sourced from Eastern Europe. 

Vintage Windings inductors.

Of course, as soon as I nearly finished my build, I found a NOS Traid R-7A transformer in the original box and another used (?) R-7A which are both in the mail at the moment.  Debating whether or not to replace the current Hammond in favor of a vintage R-7A?

With the exception of the reverse pot, the rest are NOS Allen-Bradley pots . 

The 2k5 reverse log pot is a Mouser sourced modern part which unfortunately is a mini pot that I kludged into fitting with a home made shim around the bushing to make it fit properly in the chassis.  I recently learned of and ordered a small number of full sized 2k5 rev log pots from Blore Edwards Limited in the UK.   I'll probably swap that part out just to have a full sized pot in place even though the mini pot is working.   

Thanks to Martin for making this chassis available.  Great project!  A second build is likely ahead of me in the near future!  ;-)
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: ron_swanson on August 28, 2019, 11:00:46 AM
more...
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: ron_swanson on August 28, 2019, 11:02:56 AM
last one...
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: ron_swanson on September 17, 2019, 06:27:13 PM
Of course, as soon as my MEQ-5 build was nearly completed, I found a pair of Triad R-7a power transformers and a pair of Triad HS-50’s to compliment the Triad HS-56 input transformer already wired in. 

The surgery was successful. 

Now my build has a full set of vintage Triad transformers. 

Sounds amazing!!!


Cheers, Greg
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: ron_swanson on September 17, 2019, 06:28:14 PM
And, one more...
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: ron_swanson on September 18, 2019, 09:47:06 PM
Shout out to Blore-Edwards who made me some custom 2k5 Reverse Log pots for this build. 

https://www.blore-ed.com/

Excellent quality.  Beautiful feel.  Like them maybe a little more than the Ohmites!
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: rainton on September 19, 2019, 03:03:33 AM
Your unit looks amazing!

Great work! I used the same set of transformers in my build - and the only problem about having one MEQ-5 in my repertoire is that now I want a second one  ;D

I already have the HS56 and a HS50...
Title: Re: FEELER: Authentic P2P Pultec MEQ-5 chassis
Post by: ron_swanson on September 19, 2019, 11:20:23 AM
Your unit looks amazing!

Great work! I used the same set of transformers in my build - and the only problem about having one MEQ-5 in my repertoire is that now I want a second one  ;D

I already have the HS56 and a HS50...

Thanks rainton!

I too have another set of Traid transformers and I also have a second build on my mind...   ;D