The new toroids FT240-31 and FT 140-32. Using these is overkill for the power levels I hope to reach.
In the future I will try to get some more power. Then I do need them.
Using those cores improved the amplifier dramatically. Now I can get at least 60 Watt sinus output. A bit more when it has warmed up ,which seems strange.
While I was waiting for the core to arrive I build a 7 elements lowpass filter. I almost burned up the capacitors when I applied power to it. They can not handle 100 Volts thats is clear. I have no idea how much they can handle. I bought a bag full of them on Ebay. No info is available. So I used a series circuit of 2 capacitors to decrease the voltage. That worked quite well. They still get to hot though. After a minute full power the output is no longer a clean sinus. So eventually I will use a series circuit of 3 or more capacitors.
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