Re: LF: RE: Simple, low cost, 8.970kHz stable source?

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Subject:	Re: LF: RE: Simple, low cost, 8.970kHz stable source?
From:	Andy Talbot <[email protected]>
Date:	Tue, 26 Oct 2010 19:25:31 +0100
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Use a programmable divider for more obscure division ratios.

September's RadCom has a generic design for 74HC161 type

Andy
www.g4jnt.com

On 26 October 2010 19:16, Roger Lapthorn <[email protected]> wrote:

CB crystals.... thanks Rik (and others). This does sound like a sensible and low cost approach.

73s
Roger G3XBM

On 26 October 2010 19:03, Rik Strobbe <[email protected]> wrote:

Roger,

an easy (and cheap way) might be CB crystals. Most are 3rd overtone in the range of 26965-27405kHz (= 8988-9135kHz xtal frequency). Divided by 1024 (eg. using a 74HC4060 as oscillator / divider) you get 8777-8921Hz.

73, Rik ON7YD - OR7T

Van: [email protected] [[email protected]] namens Roger Lapthorn [[email protected]]
Verzonden: dinsdag 26 oktober 2010 19:04
Aan: [email protected]
Onderwerp: LF: Simple, low cost, 8.970kHz stable source?

What do people think is the simplest, lowest cost, way of generating a stable 8.970kHz frequency that does not require a PC when running? I thought of an HF crystal divided down by 256 (from 2.296320MHz), but have you tried to buy a "made to order" crystal lately?

73
Roger G3XBM
--
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