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February 11th 11, 06:10 AM posted to rec.radio.amateur.homebrew

Dan Lanciani Dan Lanciani is offline

Dan Lanciani is offline

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First recorded activity by RadioBanter: Sep 2007

Posts: 12

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Emulating a crystal

In article , (FyberOptic) writes:

| Hey folks, I was wondering if anyone better versed in analog
| electronics could help me out with an idea. I've seen various
| projects on the internet where people have repurposed old radio
| equipment for other uses, like using a CB to receive amateur radio
| frequencies. So stuff like that got me wondering. I have an old
| crystal-based scanner that belonged to my dad. It has a range of
| 30-50 and 148-174mhz. While police/fire/rescue have all moved to
| digital systems, I know that the city's public works still uses
| frequencies in the latter range. I'd like to be able to receive
| those, without buying several crystals. So I'm wondering if it's
| possible to create some kind of oscillator (LC-based or whatever) to
| simulate a crystal for this type of device. It wouldn't be nearly as
| accurate/stable of course, but I'm curious if it's possible.

My father did exactly that with a 70's vintage Radio Shack scanner. He
put a knob on the side near the end crystal in the crystal compartment.
I probably still have it somewhere.

Dan Lanciani
ddl@danlan.*com

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