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In the Forum: Audio Discussions
In the Thread: 250 watts Parallel S.E. advises
Post Subject: GM-100Posted by devo_yan on: 5/29/2018
I read about the GU-81 penthode. It's probably a good possible solution, thank you.
I haven't so much experience with penthode, from my very few experiences, I felt better with triodes (DHT or IDHT), so I prefer don't take any risk.
I feel more and more attracted by the GM-100 (after reading again that parralele many triodes seem to be a bad idea)
So I think to use it like this:
3500 Volts on the plate 250mA (-120 volt automatic bias (carbone wounded resistors and paper in oil cathode capacitor (or blackgate if possible))
It should allow 160 watts output power in A1 (right ?)
So I should need:
- 2*2600Volt 200ma (so 400ma) power transformer (1040 watts) (2 times in purpose to do full wave rectifier with only two tube rectifiers (836))
- 14 000ohms: 8ohms; 4ohms; 2ohms output transformer. (how much power output transformer should I chose for 160watt A1 ( a little bit more in A2 and high crests factor) ?)
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