[Heathkit] DX-20 T/R Switching?

[Donald Spoon]

Curt,

When I owned an AT-1 I used a knife switch for the antenna switching!  
When it come time to transmit, I threw the knife switch and turned on 
the HV and started keying.  Receive was the reverse.  If you had the 
oscillator keyed also, you could leave the HV on if you were careful not 
to key the transmitter when listening.  Of course, I was about 14 years 
old and very much a novice, but it worked for me!  I also was "filthy 
poor" and couldn't even dream of T/R switching...  The AT-1 was 
purchased via earnings from a Paper route over about 6 months.

I seem to recall a powered T/R switch that would ground the Receiver 
antenna lead when it sensed transmitter power.  That seemed to work 
well, but I never owned one.  Things have changed...

Cheers,
-Don Spoon-

Curt wrote:
> I built a relay box to switch antenna between transmit and receive for a 
> recently acquired DX-40.
> Contemplating acquiring a DX-20, was surprised to notice it has no provision 
> for providing switched power
> for a relay.  Never having owned any Heathkit transmitter in my old Novice 
> days, am wondering how folks
> performed T/R switching with the DX-20 or AT-1?
>
> 73, Curt KB5JO 
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