Amp Camp Pre+Headphone Amp - ACP+

Another ACP+ Is alive in Hammond case. LED is muttering “almost there…”
1V in, 5.8VPP out. Driving F4 nicely.
PSU is 24V.
thd 0.08-0.12% RCA out
9.8mA through R4 (47R)

Sounds wonderful with 32ohm headphones.
Thank you for that info! Almost 6v should do the job for me too
The truth is that I was also asking for use with my F-4s but “Will it drive an F-4” is an ongoing joke around here
And I really needed to know! However I think that for max output the F-4 can handle voltage up in the teens
 
Another ACP+ Is alive in Hammond case. LED is muttering “almost there…”
1V in, 5.8VPP out. Driving F4 nicely.
PSU is 24V.
thd 0.08-0.12% RCA out
9.8mA through R4 (47R)

Sounds wonderful with 32ohm headphones.
Hello sov,

a nice ACP+ - build! And you have used the sommercable - SC ALBEDO. I like this cable a lot and
use it myself. Pretty low capacitance per meter...
Cheers
Dirk
 
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You could use a 10R resistor (2W) as connection between audio ground and chassis, paralleled with a 25A or 35A rectifier bridge. You then can parallel both with a 100 nF film cap.

Just for testing purposes - use the 10R resistor only.
As a permanent solution, it is not safe because it cannot channel enough current to ground to trip the breaker in case of a fault. That's what the rectifier bridge is for.

Best regards, Claas