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LF: RE: Re: QRSS QRG's > 3579.25 kHz

To: <[email protected]>
Subject: LF: RE: Re: QRSS QRG's > 3579.25 kHz
From: "Dave G3WCB" <[email protected]>
Date: Sat, 19 Aug 2006 20:14:03 +0100
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Dick, Mal, LF,

The 74LS161 is a schottky TTL programmable divider, that will divide by any
number up to 16. There's a 74HCT161 device that does exactly the same thing,
if you prefer CMOS. I've attached a scrap of the circuit showing you how to
wire it up to divide by 12, 13 or 14.

If anyone on the reflector wants a copy of the complete circuit (3579 >
234/137 kHz), let me know and I'll send it direct (750kb Word document)

73, Dave G3WCB IO91RM
-----Original Message-----
From: [email protected]
[mailto:[email protected]]On Behalf Of Dick
Sent: 19 August 2006 13:04
To: [email protected]
Subject: LF: Re: QRSS QRG's > 3579.25 kHz


Thanks for this info Dave.
Of course I have these x-tals; they also been used regulary for 80m fox
hunting TX's.
Biggest problem however, is to divide by 13........
I do not have to much schematics about dividers.

I found another solution, hi
I took an 4.433MHz X-tal and tuned it down to 4406kHz......
That divided by 16 will give me the 275.4kHz I need to drive the rest of the
circuit.

Any schematics/links about how to divide by 13 are welcome.

I'll be on this afternoon 14-15ut on 136.550kHz +/- 50Hz with CW 8wpm beacon
mode.

Maybe, one of these days my signal might show up around 137.7 in QRSS
3......

Dick, pa4vhf



Attachment: 74SL161.gif
Description: GIF image

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