Recent content by Jim5570091

On the out put transformers that is.

What value metal clads are standard for HG 2sc2879 16D08. My box had Toshiba in it before and had 1000 pf. Should they be a different value? Like 1200pf.

Those are better than gold nuggets.

Copy that. I’d just trying to work out a way to know if all that combination is correct by testing.

I managed to get this job completed. Photos is completed results. Turns out I was chasing a bad coax and meter. Go figure. Probably what popped the pills originally. But my goal is to understand how to do input/output tuning. On amplifiers of this design.

It’s a XForce straight 10 pill. That burned completely up. I replaced all the pills from Toshiba 2879 red dot with hg 2879 16DO8 matched. Tested all the caps replaced one bad one on an output transformer. New mini coax, new 5 Port combiners/splitters. All new resistors throughout. All matched. I...

Anyone have a good reliable smith chart program download link? And some expertise on input output tuning amplifier. Can you use an antenna tuner on the amplifier input to verify 50ml input? Amp on and manually key the amp?

Wouldn’t the SWR swinging still be happening while running the tube type by itself?

Don’t have a dummy load that will handle 1.5 KW. To find out. But just changing it from a tube type driver to a solid state stopped the bouncing fluctuation. My problem is solved but just trying to understand why a tube amp driving a solid state would cause that issue.

It’s a straight 10.

Strange swr behavior resolved. Galaxy 2547 dead key .75 watts 4 tube 6jb6 driving x-force 10 pill. Anytime I turned the dead key up past a 200 watt my swr would go from 1.2 steady to bouncing erratically all the way to 3. Some research pointed me toward a bad connection on my coax or arching...

And should it be isolated from the mast?

Considering building a 5/8 wave ground plane for my base. If using a gamma match to feed a ground plane antenna would the radials and verticals be electrically common?