Api 312 cards racked....

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radiance

Well-known member
Joined
Jun 4, 2004
Messages
3,229
Location
the Netherlands
Here some 312  cards I racked...they were original cards but needed to be hacked to accommodate the remake input transformer.
The opamps are Fabio's 2520 clones. I've used Igors universal input boards. There's also a full relay bypass present since I used this as insert on my 2 bus... (+ an extra 48v switch on the backsied that overrules the ones on the front panel to  prevent accidentally flicking the switch and frying some gear)
Frontpanel was doen by Frank Rollen...
 

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very nice and clean.
one question:
whats holding the universal input boards?is it only the hi z nut?
 

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