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BA on +/- 24V

Posted: Tue Sep 27, 2011 11:45 pm
by Holger
Is it possible to run a BA on +/- 24V just as a gain stage with input transformer and DOA ? I don't have 48V in the box I'm currently working on.

Re: BA on +/- 24V

Posted: Wed Sep 28, 2011 7:45 am
by Joe Malone
Holger wrote:Is it possible to run a BA on +/- 24V just as a gain stage with input transformer and DOA ? I don't have 48V in the box I'm currently working on.
Yes wire +/-24v to BA PCB +V = +24v and BA PCB 0v = -24v. Wire opamp pin marked 1/2V to +/-24v supply 0v.
Do not fit the 10k resistor beside the Rload resistor and the 220k and 10k beside it. This will allow the gain and +/-out to be referenced to the new 0v of the +/-24v.
The ground plane on the BA PCB will now be at -24v. Short out the 10R resistor. Done

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Re: BA on +/- 24V

Posted: Thu Sep 29, 2011 2:13 am
by Holger
I don't know why it works but it works :D
Thanks.