[Johnson] Johnson T/R Switch 250-39 Function

[Charles Ring]

The Johnson TR switch is as pure QSK as there has ever been. I have one 
with a bad power transformer,wondering if  a replacement can be found. I 
also don't remember whether or not the tube (6BL7?)  is available, and I 
don't know if it is safe to use with modern receivers.

73 de W3NU


Don Ehrlich wrote:
> I am thinking of bidding for Kevin's T-R switch.  I need to know if the 
> switch can provide near-QSK operation.  Does is use a fast switching relay 
> or is the transmitter connected to the antenna all of the time with 
> isolation of the receiver during transmit?
>
> Application would be with a Ranger and my SX28A where I am presently using 
> manual switching.
>
> Don K7FJ
>