I'm just reviving this thread to see if others have had any further success with the 50w Amp. I went around the horn a couple times until I remembered reading something about this. I had issues with erratic, low tx out of the amp when connected to the QMX. Aftew going through one end of the amp to the other--including replacing the 4.7k POT with a multi turn variety, same results.?
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On the qcx mini, it works flawlessly as designed at about 23 watts, 13 volt supply.?
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I have re-read some of the comments here but don't quite understand the issue causing this problem; the ptt is putting the amp into transmit, 4 watts input to the amp and dummy load and Bird 25w slug...power jumps around from 10-15 watts out, but very erratic. Just curious whats going on (SWR safety is disabled)...its as though the qmx is throttling back on the input power?
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If nothing else I have re-confirmed the amp works A-OK with the qcx as designed...
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Scott vy1co
