DC Servo MOSFET Amplifier

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I found two errors and fixed them. This has been tested and works well.
 

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Last edited:
Some tracks missing...
Use this PSP100 for FX100 with 3 pairs.

Hi Mile,

I took your advice and built the PSP 100 PSU. I had to make a little daughter board to output +-15V for the XLR pre's. Here are some pics of it installed.

By the way, the protect LED is inverted in the file you shared in the post above.

I did a bit of a redraw to be able to use some euro blocks instead of all spade connectors.
 

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    PSP100 with daughter board.jpg
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Hi Mile,

I hope you are still monitoring this thread. With this PSP100 PSU the clipping circuit is a little too sensitive. The LEDs start flickering and a pretty low volume. They act more like VU lights than clip indicators. Are there some changes I can make so they don't flicker until clipping occurs?

Also, I was out of 0R33 2W resistors so I used 0R15. May I assume that these will affect the over-current circuit?

Thanks, Terry
 
Apex FX100 R22 to trim pot adjustment value

hi guys is been so long I'm just checking my Sprint file collection and I don't remember if this R22 was change by a pot and what value it was? also is this PSU good to go no changes? looks good :)
 

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