Crystal Substitutes?

[KG4CGC]

So I found a couple of CB waklie talkies, one 3 channel one 6 channel. They use crystals. I want to mess around with one of them and see what what it will do.
What can I plug in or make to plug in the RX crystal socket to receive something other than CB? Variable capacitor? Anyone have a circuit diagram of something that will work like one that I can use to make it more frequency agile? It's not for any purpose other than to see what it will do.

[PA5COR]

An LC network around 9 MHz can work as VFO, but will stay limited in range.

[KG4CGC]

http://www.seekic.com/uploadfile/ic-circuit/s2009727938772.gif

Something like this?

[K7SGJ]

If you are going to try that, I'd put a coupling cap between the collector and the rig so you don't run the 3 V supply into the radio.

[PA5COR]

Yep, that is how we broadbanded the 23 channel Cb's in the time.
And the TR 7200G of Kenwood a chrystal controlled 2 meter transceiver ;)
Bit finicky but it worked

[KG4CGC]

If you are going to try that, I'd put a coupling cap between the collector and the rig so you don't run the 3 V supply into the radio.

I'll measure the voltage from the socket to see if there is any, or enough voltage present to run it first.

[KG4CGC]

Yep, that is how we broadbanded the 23 channel Cb's in the time.
And the TR 7200G of Kenwood a chrystal controlled 2 meter transceiver ;)
Bit finicky but it worked
I'll see if there's anything left at the local RS. Ours is closing now.

[KG4CGC]

How 'bout that. A TRC 209 just fell into my lap. I think I have a mic that will fit it too. So far it's in 100% working order.

[NQ6U]

http://www.seekic.com/uploadfile/ic-circuit/s2009727938772.gif

Something like this?

Where do you connect the leenyar?

[K7SGJ]

How 'bout that. A TRC 209 just fell into my lap. I think I have a mic that will fit it too. So far it's in 100% working order.

I hope you were wearing a cup.

[WØTKX]

You gonna start a HAMIS net on 27.025? ;)

[KG4CGC]

You gonna start a HAMIS net on 27.025? ;)

I think I actually have a pair of crystals for that freq. I put them all in the 6 channel talkie. And to think I went into an old shop for something completely different.

Yeah, that TRC 209 was 5 bucks. Haven't found one for sale online yet. I wonder what I can get for it BUT, it brings back memories of my misspent yoot.

[KG4CGC]

I hope you were wearing a cup.

Yours.

[KG4CGC]

Where do you connect the leenyar?

It can go anywhere.

[WØTKX]

That's kind of a "collectors" talkie, raayt thar.

I used to have a couple of Handic 65C's with microphones and antennas, just like this:

http://rigreference.com/img/rigs/31/4621/handic-65c-front.jpg

[KG4CGC]

That's kind of a "collectors" talkie, raayt thar.

I used to have a couple of Handic 65C's with microphones and antennas, just like this:

http://rigreference.com/img/rigs/31/4621/handic-65c-front.jpg

OOoooo! Never saw one of those.

I got to looking around the old parts I have sitting around and of all things, I found a Radio Shack power mic with the 5 pin din connector! Popped in some new batteries and it all works. Just amazing. Just amazing.



Years ago, when I was about 10 years old, a friend had a TRC 201. I stuck a variable capacitor in one of the crystal sockets and we listened to VOA on the whip antenna half the night.

[HUGH]

On Ebay there are a couple of simple, very small pcb kits, with specific IC components, covering a very wide band-width. If I remember where I last put them I'll give details, possibly tomorrow.

[HUGH]

LTC1799 from Linear Technology is one of the chips.