Kevin

500/51X Series SLQ51X SSL styled 4000 EQ / Filter
« on: October 04, 2020, 09:46:05 AM »
Hi Friends
Since the last weeks i'm designing this loved SSL Styled EQ for 500/51X series
i used the shematic of the 4000 EQ with 1246 In- and 1646 Outputs which is in another topic, also removed the errors in the other project. In my Version I added switchable Low Cut and High Cut Filters
Biggest Problem as always small Potentiometers. but i found working pots
Its running on +16V/-16V in the VPR or 51X Rack

Here is the actual layout of the Frontpanel


UPDATE 20.10.2020:
I finished my first prototype boards and drilled my own frontpanel on myself, final version will be black powder coated and of course no screws on the frontpanel, so i can offer kits in November, so christmas is saved for DIY.
First Prototype running perfectly, just need more time in metalwork. will do a second prototyp in around a week and will order after this Boards and Metalwork for enough kits for everbody who is interested.




if we get 20+ interests i will open a thread in white market
I can offer full Kits or assembled units, since i have bought many of these potentiometers already, and kits will be cheaper if there is a lot of interest, since the metalwork will be the most expensive part. I also calculated my final price it will be 200 Euros including really everything plus shipping depending on how many kits and location. Please write an Pm or mail to fkevin[at]web.de

I will list People who are interested in this project here.

TillM - ? Kits
Ricardus - ? Kits
boji - 2 Kits
uptownsquash - 2-4 Kits
Winetree - 2-4 Kits
BerndVP- 2-4 Kits
JMan - 2 Kits
rob_gould - 2 Kits
CiaoPatsy - 2 Kits
Malcho - 2 Kits


At the moment 16+ Kits




« Last Edit: October 20, 2020, 05:34:06 PM by Kevin »


TillM

Re: 500/51X Series SLQ51X SSL styled 4000 EQ / Filter
« Reply #1 on: October 04, 2020, 11:16:03 AM »
Hi Kevin!
sounds good !
It will depend on the price, but I’m really looking forward for it.

Ricardus

Re: 500/51X Series SLQ51X SSL styled 4000 EQ / Filter
« Reply #2 on: October 04, 2020, 11:42:30 AM »
I am definitely interested. I will have to see how funds work out because covid has definitely hurt my income these last 5 months.
Audio mastering for hire..

boji

Re: 500/51X Series SLQ51X SSL styled 4000 EQ / Filter
« Reply #3 on: October 04, 2020, 01:10:12 PM »
I'd likely be in for a pair. Thank you!

Re: 500/51X Series SLQ51X SSL styled 4000 EQ / Filter
« Reply #4 on: October 04, 2020, 01:12:49 PM »
i would be interested for 2-4 of these price dependent

john12ax7

Re: 500/51X Series SLQ51X SSL styled 4000 EQ / Filter
« Reply #5 on: October 04, 2020, 04:34:57 PM »
Were you able to get small enough knobs? I did a version of the 4k but found the front panel a bit too cramped with the smallest sized knobs that were available, think the commercial version is a custom mold. The PCB layout gets rather tight too with through hole. Just some things to keep in mind.

It's a great project, and a great mixing EQ.

Kevin

Re: 500/51X Series SLQ51X SSL styled 4000 EQ / Filter
« Reply #6 on: October 04, 2020, 07:01:30 PM »
Yes the commercial one has also just 11mm knobs,
i use sifam 11mm knobs for this project. but i have two pcbs top on top and place parts between these two pcbs. than it gets a bit easier to place that many parts.

At the moment i think the full kit including everything will be in the range around 170-230 Euro. But i need to calculate again soon.
I will have the final price for the full kit in a about two weeks when i order my my test frontpanel.
« Last Edit: October 04, 2020, 07:18:45 PM by Kevin »

Winetree

Re: 500/51X Series SLQ51X SSL styled 4000 EQ / Filter
« Reply #7 on: October 04, 2020, 09:41:30 PM »
i would be interested in 2-4 of the kits.

BerndVP

Re: 500/51X Series SLQ51X SSL styled 4000 EQ / Filter
« Reply #8 on: October 05, 2020, 02:14:22 PM »
Interested in 2-4

JMan

Re: 500/51X Series SLQ51X SSL styled 4000 EQ / Filter
« Reply #9 on: October 05, 2020, 05:31:17 PM »
Also interested, probably in for a pair as well


12afael

Re: 500/51X Series SLQ51X SSL styled 4000 EQ / Filter
« Reply #10 on: October 06, 2020, 03:17:07 AM »
I´m doing a similar project, any tips where to get these pots? I got them all but in different shafts configurations.
heavy metal is the law!!!

Kevin

Re: 500/51X Series SLQ51X SSL styled 4000 EQ / Filter
« Reply #11 on: October 08, 2020, 08:55:56 AM »
yeah i use alps and ttpots. i got all from different suppliers. some from german distributors and some from mouser. too much complicated to get them all from one place. sadly. will get my prototype together next week, so there will be more pictures then.

rob_gould

Re: 500/51X Series SLQ51X SSL styled 4000 EQ / Filter
« Reply #12 on: October 08, 2020, 02:07:19 PM »
Interested in a kit or two depending on price
Studio furniture, modular synth cases and more...

www.gouldcaseworks.nl

Re: 500/51X Series SLQ51X SSL styled 4000 EQ / Filter
« Reply #13 on: October 09, 2020, 05:35:11 PM »
Lord yes!!! In for a pair.

MountCyanide

Re: 500/51X Series SLQ51X SSL styled 4000 EQ / Filter
« Reply #14 on: October 09, 2020, 06:14:08 PM »
10 Knobs. NUTS! Good job.

Malcho

Re: 500/51X Series SLQ51X SSL styled 4000 EQ / Filter
« Reply #15 on: October 11, 2020, 03:43:08 AM »
+2 kits and panels

Re: 500/51X Series SLQ51X SSL styled 4000 EQ / Filter
« Reply #16 on: October 13, 2020, 08:39:19 PM »
How are the controls for the hp/lp implemented? I see the holes in the middle of the panel, but are those for pots or toggle switches? Is the cutoff variably controlled with a pot, or are toggle switches switching in a hp/lp with pre-set cut-off frequency? If using pots, where are the graphics for the cutoff frequencies?

I do understand if they are toggled because of limited frontpanel real-estate...

Kevin

Re: 500/51X Series SLQ51X SSL styled 4000 EQ / Filter
« Reply #17 on: October 14, 2020, 01:30:08 AM »
Yes the hp/lp are just toggle Switches, but with indicator LED, i use fixed frequencies for that. 80Hz and 12kHz Cutoff. its a 3 Staged circuit like you already know from the 9k/4k by Bruno Preamp. It's a 3rd order Sallen Key Filter. In fact you still have shelf filters for low and high and reduce with them frequency wise the cut or boost. And in fact 10 pots are the maximum you can squeeze on a 500 panel. if you put the 11th Pot there you can't put maybe just one other toggle switche there. ;)

Kevin

Re: 500/51X Series SLQ51X SSL styled 4000 EQ / Filter
« Reply #18 on: October 20, 2020, 05:32:57 PM »
updated all infos in first post

BerndVP

Re: 500/51X Series SLQ51X SSL styled 4000 EQ / Filter
« Reply #19 on: October 21, 2020, 08:24:46 AM »
Looks good!
Maybe going for a more SSL 4000 color look ?

And HF knobs maybe red too ? Like the real thing ? :)


 

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