On Tue, Sep 4, 2018 at 07:42 AM, ajparent1/KB1GMX wrote:
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80m harmonics, use external low pass filter
60m harmonics, use external low pass filter
40m harmonics, use external low pass filter
30m should be ok cw and SSB-digital
20m should be ok all modes
17m should be ok all modes.
15m CW ok, SSB has spur
12m CW ok, SSB has spur
10m CW ok, SSB has spur?
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This is great, it means the two bands I'm interested in, 30m and 20m, are good to go.?
If I followed the various threads correctly, on 80 through 40 meters, CW was the big offender for harmonics, but SSB was not much better.
If people overdrive the TX on SSB, that is not the radio's fault. I imagine there are people overdriving and splattering all over the place with their multi grand super deluxe transceivers, by attaching all manner of add-on microphone audio processors to get more "punch".
Without any expensive equipment at all, there are multiple ways to see if you are overdriving the transmitter.
An SWR/Power meter. Increase audio until power increase flattens out and back off 20 percent.
Use a lightbulb (24+ volts, low current in parallel with a dummy load [or gasp -- antenna]) and do the same judging from the lightbulb brightness.?
Do basically the same measuring the RF voltage.
Use a nearby SDR dongle, with antenna disconnected, and look at your signal output and see where the spurs and splatter start to increase and back off the audio level.
Tom, wb6b
