>Even cooler was the "Johnson Viking TR Switch."
>This was an external device with two vacuum tubes that automatically
>switched the antenna between the RX or TX (instantly) whenever it was
>activated.
Actually, the transmitter was always connected. The tube saturated and
recovered quickly, thereby removing the receiver from the line when
transmitting. No relay involved. Worked great. Did QSK with a 500 and Drake
R4B.
73 de
Jim Lasley, N0JL, A1-Op
Chairman, Central Area Staff, NTS
Assistant Director, Midwest Division, ARRL
Manager Central Area Net Cy4
n0jl<at>yahoo.com
n0jl<at>arrl.org
n0jl<at>arrl.net
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