Altec 436 PCB

Nadege · Feb 19, 2008

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 · Feb 19, 2008

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 · Feb 19, 2008

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

Nadege · Feb 20, 2008

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

Guest · Feb 20, 2008

Does someone find 436B schematic ?

Holger · Feb 21, 2008

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

KingKai · Feb 21, 2008

I have 438A....

Guest · Feb 21, 2008

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

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

Schmilsson · Feb 21, 2008

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

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

Guest · Feb 22, 2008

I already try but with no answer ...

peterc · Feb 22, 2008

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

Peter

MrZpliff · Feb 22, 2008

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 · Feb 23, 2008

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 · Feb 23, 2008

If those are not the EMI Mod,

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

abby normal · Feb 23, 2008

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

craigmorris74 · Feb 23, 2008

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 · Feb 23, 2008

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 · Feb 24, 2008

Doug, thanks for sharing.

Schmilsson · Feb 24, 2008

THANKS!

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

rafafredd · Feb 24, 2008

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

Altec 436 PCB

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