[Elecraft] KPA500 Interface with Kenwood TS-590

[Dave Johnson]

Doug, you need an oscilloscope and ideally trigger it from the key
line. For an example of the sort of problems some radios have see:
http://www.astromag.co.uk/ft857d/

Connect the radio to a dummy load (no amplifier needed), set the radio
for a drive level in the 10 - 30 Watt region and send a single "dit"
on the key. Even without a storage 'scope you can repeat the dit and
see if the envelope is clean or not. While the KPA500 may show the
spike as a momentary peak on the bar graph, even my LP-100 power meter
isn't anywhere near as good as a 100 MHz 'scope at seeing what is
really going on.

It is not always the leading edge of a CW character that causes
problems, the FT857D created spikes during SSB speech too.

I have not tried a TS590, my TS480SAT is clean as is my K3.

73 Dave, G4AON

>I'm not sure how to observe the
>spiking you mentioned