Topic: Touch Keyer (2 replies)
#1     Fri Aug 03, 2007 12:21 pm
Join Date: Aug 2006
Posts: 724
Subject: Touch Keyer

I finally finished my touch keyer project. Here are my pictures...

The touch keying works very well even at high speeds. The sine wave audio sounds very good.

There was a problem with the big speaker magnet bothering the reed relays, but i moved them further away. I am now trying some toroids to reduce RF getting into the final audio amplifier. The RF is coming in through the 12 volt power adapter. I had the same problem with computer speakers and the toroids solved it.

The paddle has crescents cut from a tin can then glued onto the sides of the marker pen cap. The paddle was dipped into red enamel paint a few times.

73, Doug
#2     Fri Aug 03, 2007 12:55 pm
Spokane, WA
Join Date: Oct 2006
Posts: 114
Subject: Keyer upgrade


I downloaded your keyer software and wired up my paddle to a serial port. Congratulations on this fine achievement as it works very well.

73 Bob
#3     Fri Aug 03, 2007 1:54 pm
Join Date: Aug 2006
Posts: 724

Hi Bob, That is great news.

Yesterday Clay added RATIO to the engine and he changed the attack / decay ramps from straight-line to cosine curves.

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