Um....here's a bit about my results:
- BEFORE the swap 30M was putting out more than 1 watt higher power than 80M, 60M, and 40M ...? PLUS 20M was a 1/2 watt lower than 80M, 40M, and 60M. (And this with using the 5mA bias for 20M from a factory reset. The other bands were set to "30" for their "pin bias" btw.)
- AFTER the LPF cap swap 30M power was lowered and is at the same(-ish) power as the lower freq. bands BUT (alas) 20M went even lower than it had been and was now around? TWO full watts lower than the other bands !! ... So I upped the bias to "30" and got ONE of the TWO watts lost back.
End result, 30M is now at the same power level as 80M, 40M and 60M.... 20 is now even at a lower power level than before the swap. Nisht gut.
es vy 73 de "baab" w9ya
P.S...Software is now at XXX.003 and "factory resets" from BOTH the terminal and front panel.
P.P.S... NEW (and tested) caps were used for the "swap". C525 was mounted to the bottom of the board and is covered with blue tape to prevent shorts tot he case. I am assuming that this position is not the cause of the sad results outlined above.
P.P.P.S..... My next step will probably be to A) Verify power going into the LPF with an o-scope &/or B) verify the toroids and windings.
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On Wed, Jul 12, 2023 at 04:48 PM, Sandy wrote:
I think I broke all records putting my QMX on putty to change the 5 back
to 30, but for my machine (#133) 20m stayed at 3.5 watts. All others are
a steady 5 watts. Sandy KB3EOF
