Can't you also hook up a filter and listen on another radio to see if it
cuts down the interference? 73
Tom W7WHY
Another simple test I used years ago before I had HP instrumentation was
to transmit through them at 50W or so into a 50 ohm dummy load and
measure the SWR over the width of the band. SWR higher than about 1.25:1
suggests either mis-alignment or component failure, which often results
in increased dissipation and (more) component failure.
It's also a good idea to compare your test results with the mfrs
specs.Some filters, like the Dunestars, intentionally don't cover the
entire width of the wider bands (80M and 10M).
73, Jim K9YC
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