[Elecraft] K3: re CW ID macro on SSB

[Edward R. Cole]

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
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