Here was the mistake a few times.
The transistor and a precision resistor were broken and therefore no more power.

Marcel wrote: ↑Fri May 19, 2023 1:09 pm Here was the mistake a few times.
The transistor and a precision resistor were broken and therefore no more power.

Thank you very much!!! I was able to tune the filters correctly and am now getting 100w out of that unit. If I ever need to fix something, the plans you posted will be very useful! Btw, if you'd be interested to take photos of the complete manual (they don't need to be perfect): I'd pay you 20€ as an allowance