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1. LF: Re: 137kHz transmitters (score: 1): Author: "Martin Evans." <[email protected]>; Date: Fri, 25 Jun 2010 18:39:04 +0100; 3560 and 3579kHz, both cheap crystals, divided by 26, give CW and QRSS frequencies on 136/137kHz. What is the simplest and cheapest way of getting divide by 26? 73s Roger G3XBM Well, forty years ago; /rsgb_lf_group-archives/html/rsgb_lf_group/2010-06/msg00365.html (8,914 bytes)
2. LF: RE: 137kHz transmitters (score: 1): Author: Rik Strobbe <[email protected]>; Date: Fri, 25 Jun 2010 19:33:49 +0200; Roger, if you want to end up with a 50% duty cycle signal you need to divide by 13 and then divide by 2. Divide by 13 can be done using a presetable 4 bit counter such as 74HC160 (http://www.datashee; /rsgb_lf_group-archives/html/rsgb_lf_group/2010-06/msg00705.html (11,176 bytes)

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