Posted by
Edward R Cole on
Feb 16, 2011; 11:49am
URL: http://elecraft.85.s1.nabble.com/K3-re-CW-ID-macro-on-SSB-tp6031389.html
As a side note to this topic, I found it interesting to see how the
MCW was produced in the LF NDB Aircraft Beacon transmitter that I
modified to be a linear amp for the 500-KHz ARRL Experimental Program.
It was common for them to have CW that shifted 400-Hz upward in
frequency, but instead of AM tone modulating a carrier they ran two
xtal oscillators: One as set on the carrier frequency and ran
continuously and a second xtal oscillator set a at f1 = fo +400 Hz
and was keyed by a CW memory keyer. This resulted in both "carriers"
being transmitted by the linear amps as CW modulated USB +
carrier. On an AM receiver it produced 400 Hz MCW.
For my use I disabled both xtal osc. and disconnected the CW keyer
ckt. I substitute the TEST signal from my K3 for the oscillator
carrier. The rest of the transmitter is linear amplifiers. I can
drive the 100w 500-KHz xmtr with only 0.1 mw and in any mode that is
possible on the K3. However we are restricted to CW, QRSS, psk-31
and its variants, and WSPR. Our 15-KHz wide band is not sufficient
to support SSB and is not allowed.
73, Ed - KL7UW, WD2XSH/45
======================================
BP40IQ 500 KHz - 10-GHz www.kl7uw.com
EME: 144-1.4kw*, 432-100w, 1296-testing*, 3400-winter?
DUBUS Magazine USA Rep
[hidden email]
======================================
*temp not in service
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