On Sun, Apr 11, 2021 at 10:49 AM, Jerry Gaffke wrote:
Would be useful to know a bit more about how you conducted the IMD test:
? What tones were injected into the mike jack, and at what level.
700 and 1900 hertz were injected into the mic jack.? I had adjusted the level for the maximum power without causing an increase in the IMD3 measurement.
? Exactly which unwanted product was observed when measuring IMD
I measured the expected 2xfa +/- fb.? 4 values that were all fairly equal.
? Signal level observed into Q90.
I did not probe with the scope.
? Power out to the dummy load.
Power out varied from 10 on 80meters to 2 on 10meters
Just figures for 40m would be most helpful.
Will do it later this week.
73
Evan
AC9TU
