More XFMR qeustions this time ADM

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fluxivity

Well-known member
Joined
Jun 15, 2004
Messages
263
Location
Virginia, USA
Dang I got a fat lot of new boards with funky transformers on them. This time it's from an ADM console. I'm pretty sure they're outputs (big and square.) One is legended 3083 and the other is 3-010-5197-0. Anybody have any idea.
Thanks and thanks again
Paul
 
ADM used what was apparently the same output iron on many of their products. Four are visible in this rackup I did awhile back:

http://www.brianroth.com/projects/tfine/adm-inside.jpg

They are 1:2 ratio for increased output levels from the driving circuits.

Bri
 
I also have an ADM Mic Pre module with the black output transformer and with a round input transformer also,
will check to if if theres a marking on the input transformer.

Anyone has any schematics of this modules?

thank you
 

Attachments

  • ADM Mic Pre - Channel Strip - transformers.jpg
    ADM Mic Pre - Channel Strip - transformers.jpg
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The input transformer is 2787, can't really understand the other markings, people say the ADM used UTC input transformers, i dont really know if this is an UTC or not.

ADM%20input%20transformer.jpg


The preamp in based on an ADM discreet Opamp

ADM%20mic%20Pre%20Discreet%20Op-Amp.jpg
 
gyraf said:
2787 could well be the date code, week/year..

I'm tracing my ADM modules at the moment so I can rack them.

The input transformer I have seems to have this code:

3-010-5944-0 or 3-010-5044-0

XQS0Pu4.jpg



The pinouts are:

Primary
Pin5  - input +
Pin1  - input -

Secondary
Pin7 - Out
Pin6 - audio Ground

Pin8 (shielding) - to case/earth ground

 

Attachments

  • ADm front.jpg
    ADm front.jpg
    449.6 KB · Views: 2

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