Hello to all. I need some of the experts to give me some advice on a HB amp I
am building. I am using a 3CX3000A7 in GG. I want to ad some bias to bring down
the zero signal current. To do this I want to use a variac,small
transformer,and rectifier.
Will this work. I am looking at a 3-5 amp variac. A 24vct transformer rated
for 5 amps. And a bridge rectifier (the square kind you bolt down).
Will this work? Do I need to use a small choke in series with the rectified DC
to the cathode? Do I run the B+ to the cathode and B- to the grid current
meter?
I hope you can get an idea of what I want to do with this little bit of info.
I would like to be able to vari the bias voltage and that is why I am not using
a bunch of zeners,block diodes,etc. And yes I know you can run this tube zero
bias. But I like a little bias to help the tube run a little cooler,etc.
Any help or ideas would be great. Always like to enrich my knowledge.
Take care,Stan
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