HL2 PA issue

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Jul 7, 2026, 7:57:10 PM (10 days ago) Jul 7

to Hermes-Lite

Hi All,

Sporadic behavior - Thetis+Hermes TUNE into a dummy load shows 6w. However, hl2setup.exe utility shows PA bias fluctuates in the 1200-1300ma range.

I started to investigate because under normal operation (external amp, making FT8 contacts) everything would be working right, then go to 0w output.

So, do we think I need to replace the two AFT504 transistors, or perhaps try to do a reflow under them?

Appreciate your thoughts,

Thanks, -Jim

KC1WAY

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