DB54 - 2254 style compressor {update 22.10.19}

[dirty1_1garry]

Hello friends!

Batch of pcbs for DB54 is coming. BA cards already purchased, but looks like I've got a small delay with unite pcbs ???

I've created google drive folder where I will accumulate all information for building DB54.
http://bit.ly/2dLli43

Now it contain partlist, bom, mouser cart link, transformer list, front panel holes dimensions.  I will update it as possible.

 

[Matt55]

Hello Igor,

I can't seem to get the Mouser cart working? I put the access ID in the project searcher box but nothing comes up?

Thanks, Matt

 

[dirty1_1garry]

Hello Igor,

I can't seem to get the Mouser cart working? I put the access ID in the project searcher box but nothing comes up?

Thanks, Matt

Let me check. Yeah, my bug. Fixed.
Access ID: 33b8ed2434

For those guys who had a little Mouser experience:
Go to http://ru.mouser.com/Tools/Tools.aspx
and insert Acess ID in specific field. Voila!

 

[SIXTYNINER]

for bc184, bc214, and other no longer available parts ,
have you done some test with the replacement parts as for 1073 , 1084 clones ?
cheers

 

[Rocinante]

for bc184, bc214, and other no longer available parts ,
have you done some test with the replacement parts as for 1073 , 1084 clones ?
cheers

I believe the replacements are bc550 (or mpsa18) and bc560 and from what ive read the are perfectly suitable.  I seem to recall Dan Kennedy saying its what he used in the mp-2nv.

 

[kosi]

here's alot of info
http://groupdiy.com/index.php?topic=51340.0

BC184C
As replacement I bought MPSA18 from ebay member hfo_poland , which have hery good hfe values, I also bought some from a shop in Italy, which had pretty low values. Tested with a cheap chinese transistor tester.
Remember to turn the MPSA around.
In my NV73 I have used BC549 and 547

BC441/2N1711 - 1
2N1711 are everywhere on ebay

BC214KC
a lot of people reported, that they used BC214C versions without problems. Keep attention, that the L version has a different leg orientation, you can try to bend them, but's really a pita...

I guess, there are many other possibilities

 

[iprovlek]

BC109C,BC550C!!!

 

[dirty1_1garry]

Yeah, can confirm that BC550 works perfect at BC184 place.

 

[dirty1_1garry]

First proto of enclosure for DB54.

 

[dirty1_1garry]

Got a call from pcb fabric. Mother boards a ready! So on this week I will start to send DB54 kits to happy owners)

 

[TwentyTrees]

Woohoo! Really looking forward to this one. Thanks for keeping us updated.  ;D

 

[dirty1_1garry]

Just add samples into DB54 build folder. Check it here:
http://bit.ly/2dLli43
File name - DB54 sound test1 .zip
It contain ProTools10 session 48kHz 24bit.
If you use other daw, search audio files folder.
I made samples of drum kit (for stereo sound I precess left and right channel consecutive), electric bass and acoustic guitar with different settings.

 

[dirty1_1garry]

I forgot to add into previous post that I used standard attack setting - fixed exact like in original 2254.  Different attack settings will be tested in next test)

 

[dirty1_1garry]

And... here is a short video sample:
www.dropbox.com/s/sxwuqdvnbzi5nev/DB54%20DR%20V.mov?dl=0

 

[dirty1_1garry]

Here is how two uniting boards looks like.
But... at this moment they all sold. All kits that was made are sold 
Will order second batch of boards!)

 

[kosi]

Congratulations !
You seem to be astonished about your success  ;D
And could you post a pic, where we can see the inner goods of your 2254 ?

 

[dirty1_1garry]

And could you post a pic, where we can see the inner goods of your 2254 ?

Here is an image.
I forgot to mention that for I've sued carnhill transformers as input and interstage and EA 1166 as output.
As I've got a first serial batch of DB54 boards I will assemble it and show much in details.

 

[Murdock]

Wow, looks great! Will definatelly buy a stereo set next month!
Couple of questions:
-How hard would it be, to incorporate a high-pass filter?
-Is there a simple way to link two of your 2254's together?
-Where did you get the EA1166? Hairball seems to only have the smaller 500 versions...

 

[dirty1_1garry]

-How hard would it be, to incorporate a high-pass filter?

Hmmm, I think that it's not so hard, more then that adding sidechain hpf is in my list for experiments. And in one moment I will add it, but may be in next revision.

-Is there a simple way to link two of your 2254's together?

yes, I already made link switch in mono unit and it present same way of linking as original 2254.  Check first post for face panel example.

-Where did you get the EA1166? Hairball seems to only have the smaller 500 versions...

Aaah)) I got it about 3 years ago, as I heard EA don't produce them more. It sound a little bit sweeter then carnhill for my opinion with a small bump in low end.

 

[Murdock]

Thanks alot for the infos!
I know, its probably way to early, but do you have any kind of ETA for the HPF?