The Johnson 250-39 and B&W 380 T/R switches both had a certain amount of
"suck-out" but they did protect tube receivers.
I had both (still do) and preferred the Johnson.
http://wireless-girl.com/Projects/TRswitches/Johnson/
Note the warning about use with solid-state equipment, however.
73,
Kent K9ZTV
On 8/15/2017 11:58 AM, someone wrote:
Just a note to say that years ago, I had a B&W Electronic Antenna Switch (I
think it was called) that had one or two tubes in it.
It worked perfectly to bias the receive completely and immediately as soon as
transmit was detected. It allowed full break-in for CW work. I would like to
see something like this again today in solid state. I think this would be the
ticket for what you need. I haven’t looked, so I don’t know if anyone is
marketing such a device.
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