[Elecraft] K3 CW Spectrum

[Scott Ellington]

Last night, I captured the CW spectrum of my modified FT-1000D with the K3/P3:

http://www.ssec.wisc.edu/~scotte/hr/FT1000%20100W.jpg


It would be interesting to see what the K3 looks like on the same scale, etc.  Anyone with two of them and a P3 who would like to contribute?  Here's the set-up:

7010 kHz
K3 bandwidth 400 Hz
100 W output 
Pulsed at about 40 wpm 
Span 2 kHz
Scale 72 dB
Peak Hold
Average mode, 10
Update 10 ms (actually slower at this span)

Adjust reference level for peak signal near the top of the range.  I just transmitted into a dummy load, and relied on leakage to the K3, which seems to have been about -65 dBm.

Email me the file off list, and I'll post it.

The spectrum of an unmodified FT-1000 would also be interesting.  It's a lot worse.

I'd also be glad to make an on-air measurement, for any kind of transceiver.  It would be even more interesting to have a collection of these measurements.  You'll need to be fairly loud here.

73,

Scott  K9MA

sdelling at facstaff.wisc.edu


Scott Ellington
Madison, Wisconsin
USA