[Elecraft] Short QSO's (was Re: 6M CW)

[Bill W4ZV]

Don Wilhelm-4 wrote:
> 
> My novice days were in 1956, and in those days, the T/R switch was a 
> DPDT lever switch.  QSK was only the dream of those first class 
> stations, and was only possible with a separate receiving antenna. 
> 

The E.F. Johnson TR Switch was commercially available in the 50s and allowed
QSK with a single antenna (note the following schematic is dated 1-2-58):

http://www.w8ji.com/johnson_tr_switch.htm

I used QSK with one of these at ~500 Watts out and a 75A-4 in the 1959-1962
era but don't use QSK now because of the complexity of my receiving
antennas.

73,  Bill

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