[Heathkit] Amp Keying Interface?

[Peter Markavage]

You said: "Johnson-style tube tr relays "
There's no relays in this thing. The antenna is always connected to the
transmitter. The receiver line is capacitor coupled to this connection
through a tube. RF Voltage cuts the tube off "preventing" RF from getting
into the receiver.

Solid-state switching has made great advances over the last 30 years for
switching large amounts of RF currents. You might want to look into some
of the new solid-state linears to see how they handle switching large RF
currents.

Pete, wa2cwa

On Tue, 31 Jul 2007 16:23:55 -0400 <eugene at hertzmail.com> writes:
> This is a very interesting thread. I have often wondered how to best
> make a silent TR relay.  I have a standard dow 115vac relay in my
> station with some aux contacts for muting that makes a real racket!  
> I
> have always seen the Johnson-style tube tr relays ($$) , but this 
> thread
> got me to wondering if anyone made a solid state TR relay that can
> handle 100W? (I mean one for <$50!) 
> 
> Eugene, w2hx
>