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

[K9ZTV]

  Ah yes . . .

The Johnson T-R switch came in two iterations, as I recall.  The first 
one suffered from suck-out, as did the second, but less so.

I still have the later one, having used it for years with a Gonset 
GSB-100 and HQ-170, and later with my Drake B-twins to operate true QSK 
(receiver not-muted but protected and monitoring the sending) on the NTS 
traffic nets.

Need to dust that little gem off and get it back in service one of these 
days.

BUT . . . the K3's QSK spoils ya!

73,

Kent  K9ZTV



On 7/8/2010 11:19 PM, Bill W4ZV wrote:
>
> 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
>