HELP: WhazIt? TR switch? **PREAMP**

Ian Webb ian_webb at PACBELL.NET
Tue Apr 4 02:08:34 EDT 2000

Mystery solved!

Though several responses agreed that they remembered a T/R switch that

looked like it, it turns out that the answer was sent by a person who

"According to the Dow-Key ad in my 1963 ARRL Handbook, it is an RFB
Preamplifier. "50 to 75 ohm impedance matching 'broadband
preamplifier.'  Increases overall gain by 1 to 6 S-units on all bands
(1.6 to 30 mc.)"

His memory is better than mine and I remember now and will take a look

in the 1963 QST volume in the library!


Ian, K6SDE

-------- Original Message --------

Along with some other equipment I acquired what I believe to be a
1950s, early 1960s TR switch.

I recognize the power supply it's attached to as a modified AMECO
unit.  I can't remember the details of the unit in the foreground of
this picture which I believe is a TR switch.  I also seem to remember
it being late 1950s to early 1960s vintage.

Take a look at:


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