[Elecraft] KPA500 Power In Digital Modes

[Jim Brown]

On Tue,11/11/2014 7:17 AM, Joe Subich, W4TV wrote:
> Your measurements are not of the conditions I describe.  You are using
> *filtered and band limited pink noise* (slide #3 - EQ settings) not the
> specific digital signals I mention *and* your measurements are at PEP
> not average power (slide #2 - LP-100A set to peak). 

Right -- my test conditions for SSB are MORE demanding than either PSK31 
or JT65A, and were intended to approximate the response of the K3 (and 
amp) to a speech signal. I also made one measurement of the K3 at high 
power without compression. Occupied bandwidth was nearly identical to 
the 10dB compression, so I did the rest with compression.

Did you miss the CW measurements, where the modulation was a shaped 
square wave?

When I have time (I'm currently hot and heavy with antenna work), I 
will, however, repeat these measurements with a PSK31 test signal, and 
with JT65A. I don't expect the results to be a lot different.

73, Jim K9YC