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From: "J. Allen" <vy1ja@northwestel.net>
To: "LF \(RSGB\)" <rsgb_lf_group@blacksheep.org>,
	<lowfer@lwca.org>
Date: Sun, 16 Jul 2006 06:01:17 -0000
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Subject: LF: DFCW on TS450
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All,

Tests here show the UP an DN pins on the TS450 front Microphone connector do 
move the frequency up and down when in transmit on CW.

The QRS software shift signal from the computer is intended to key a single 
line to ground to switch mark frequency from shift.

Does anyone have a circuit for 74XX series ICs to switch the signals from 
that line to close the circuit momentarily on either the UP or DN pins?

I am working on it with a breadboard and am tired right now and it is not 
happening for me.

J
VY1JA