Ancient Radio Shack "Frequency Standard" kit

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

Reply to
Norm Dresner
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9 volts should be safe.
Reply to
Charles Schuler

The old Radio Shack kits were designed for 6V and 9V. Crystal oscillators usually involve enough series resistors that it doesn't matter much.

Reply to
Kevin McMurtrie

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