A problem for all the experts-
I Built a 3-1000Z monoband amp for 10 meters. I Sowly Variaced it up and it
seems ok at 1500volts. Put 3KV on it and it will make a few watts of power
without even putting RF to it. I heard a small RF type arc- kind of like
slight arcing in an air variable, (I have a vaccum cap) the tube glowed red
and I quickly unkeyed it. I turned the load and tune caps a bit, tried it
again- it was quiet for about 2 or 3 seconds- then it did it again. I have a
similar homebrew grounded grid 4-1000A amp and never had a problem- it worked
great the first time I fired it up! I built the 10 meter mono-bander because
I cant get the 4-1000A amp to work on to good on ten- but it works great on
the other bands. Any suggestions?? Keep in mind- I have yet to even hook a
rig to this- just a dummy load- I variaced it up, saw idling current, and it
started to run away.
Thanks!
Jim
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