[sdiy] help in finding PSU for A&H Mod2 channel strips?

Todd Sines sines_tr at scale.gs
Mon Jan 5 15:26:12 CET 2009


Hi,
[sending this again, didn't appear to go through first time]

my first time trying to rack some channel strips. I have 2 Allen &  
Heath Mod2 channel strips that require +/-24V power at 1 A, running on  
120v. I'm additionally interested in adding some transformers [Jensen,  
Lundahl, Sowter?] on the input path to use as a mic pre. Should I  
worry about Phantom Power... and how difficult is this and what other  
power requirements will this need? I've never done _anything_ like  
this before.

Looking for a source what seems to be a fairly standard 24v PSU -- is  
there anything I should be weary or on the lookout for?

this is what I was told by the guy from Gearslutz that sent me the  
schematics.

> I have Mod3 with different transformers. I don't have sowter, but  
> ETAL (don't know nothing about them).
> Transformers are used on mic preamp input, so if you don't need  
> preamp section you can just leave them out. On the other hand, if  
> you need mic preamps, then they're essential ingredient in the sound  
> of the preamp. You can find other brands to use as a replacement,  
> but be sure they have same electronic values.
>
> 24 volt DC is very common voltage value so I guess it's not hard to  
> get. You just need PSU that delivers this voltage, don't worry about  
> other values. I think one channel needs less than 0.5 A of  
> electicity and that is the value every PSU can deliver. If you're  
> racking only one channel, you won't be needing that much power (A  
> value, amper). Any PSU that can output 24 volts will do.

here are some schematics if you feel like having a glance.

http://rapidshare.com/files/172136458/MOD2.rar.html

thanks for your help.


+odd





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