Hello
Group,
What I
have seen in the past on these types of PA's is that the power control
circuit/voltage actually oscillates and causes all sorts of problems.
Check it with an oscilloscope to find out for sure. A good capacitor
placed in the correct place usually fixes that problem.
Paul
Glad to hear you have good
success with a 40 watt radio turned down to 8 watts. There was some
discussion on here some time ago that Motorola radios become unstable when
turned down with which I disagree.
I have had good success turning
GM300s down to save finals for those long winded QSOs. They all have
fans too however.
The GM300s have always looked good on the spectrum
analyzer even when turned down.
Randy WB0VHB
Andrew G.
wrote:
We have a 40watt GM300 driving a 100watt Henry with 8watts for over a
year without failure. Pretty good setup.
Andy KC2GOW
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