Altec 436 PCB

[Nadege]

Hello,

These days I've been working on a PCB version for the Altec 436C Compressor.

here is a link to the redrawn schematic :

http://s251.photobucket.com/albums/gg312/Nadege1509/?action=view&current=altec4362.jpg

And here is a link to the PCB design I have so far:

http://s251.photobucket.com/albums/gg312/Nadege1509/?action=view&current=altec436pcb2.jpg

I'm new to PCB design so any advice is more than welcome. If anybody of you have sugestion about possible mod, just let me know.

If this project comes to something interessing, I wil probably be offreing PCB to the community.

Thanks

 

[Schmilsson]

I was gonna do this p2p but wouldn't mind a pcb. How big is that pcb btw?

Mod wise there's a jungle of guesses around the abbey road mods, the rs124.
The hold function and the balance trick are at least visible from the front. The latter should be a good idea and pretty doable.
Do you have the 'recording the beatles' book? It has some info about it.

 

[pucho812]

Are you adding in the EMI mods? YOu know the ones from Abby road

 

[Nadege]

I would love to add the EMI mod but haven't found any info about it...

 

[Guest]

Does someone find 436B schematic ?

 

[Holger]

I have schematics for 436C and 438C ...

 

[KingKai]

I have 438A....

 

[Guest]

[quote author="KingKai"]I have 438A....[/quote]

I also have A and C but B version is nowhere to find ...

 

[Schmilsson]

I know Brian Roth(tape op admin) has it.
Seems like a nice guy.

http://www.brianroth.com/contact.html

 

[Guest]

I already try but with no answer ...

 

[peterc]

Go to www.tapeop.com & go to the DIY forum, he is the moderator there.

Peter

 

[MrZpliff]

Found this on the web a while ago...
dunno if it's of any interest

http://www.bitterend.se/altec436_probably_NOT_emi-mod.pdf


Edit: Name changed on pdf-file :?

 

[solder_city]

that was debunked here a while ago by a person who knows a lot of inside information about all things emi.

those are NOT the emi mods.

 

[Nadege]

If those are not the EMI Mod,

Does anybody have info about the "real" EMI mod???

 

[abby normal]

Wasn't there some talk about a hold function on those Altec EMI modded compressors or was that done on the Fairchilds?

 

[craigmorris74]

Hold is a feature on the EMI Altecs. If I get time in a bit, I'll scan a pic of the front panel.-

 

[emrr]

From the website concerning these units, which I assume was pulled down at someones request. Someone will probably now ask me to expunge this post. Nothing earth-shattering here; lots of small tweaks. Hold circuit is most significant, and simply disconnects the release resistor from B-.

http://www.revolutionrecording.com/RS124.html


EDIT

removed at request of website owner.

 

[Holger]

Doug, thanks for sharing.

 

[Schmilsson]

THANKS!

I've landed on that page a bunch of times and went "dang, I wonder what it said"

 

[rafafredd]

I have a t least four different mods for this in my files. NYD has a very good one. Ask him.