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Ancient Radio Shack "Frequency Standard" kit

N

Norm Dresner

Jan 1, 1970
0
Cleaning out a closet recently I stumbled across a Radio Shack kit I built
when I was just teaching myself electronics (2/25/80 according to piece of
tape I stuck on the side of the box). It's a "frequency standard" -- a
one-transistor oscillator with a 100 KHz crystal and a variable capacitor
for trimming the output. Unfortunately I can't find the instruction sheet
that came with the kit. As built, there are two wires (one each Red &
Black) that come out connected to a power switch. I'm sure that the curcuit
isn't very complex (total of 5 R, 4 fixed C, one Q, one Xtal and one
variable C) and while I could trace it out, I'm not really that interested
in the analysis of it as much as I am in seeing if it still works. But,
without the instruction sheet, I don't know what voltage to apply. Yes, I
could drag out a variable power supply and run it up slowly, but I was
hoping that someone might either still have the instruction sheet handy or
know what voltage it requires. (I tried a single AA cell and got no
oscillation; I can imagine that it was designed for 5V or 9V or anything
inbetween).

TIA
Norm
 
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