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It's a pretty standard layout, probably a cmos keyer that someone
wired on an experimenters board using telephone wire. You can search through the arrl handbooks for information on earlier cmos keyers. I've seen a few like it, HRO ("hugh rip off")(not really) which is is Ham Radio Outlet put out a pre-built one knob keyer back in the 80's that looks just like this circuit, less the mechanical keys. There were also projects like it in the handbook, based on revisions of the earlier wb4??? designs... which migrated into the Autek Accu Keyer layout. It took me almost ten years to find one, but I did locate a replacement which included the circuit diagram. I could make it available on the http://sonic.ucdavis.edu server if you're interested. The small board underneath is probably a 555 timer set up for sidetone. My old World Radio Labs Galaxy III (3) didn't have one, so we'd have to monitor our outbound cw by listening to the power supply hum. cheers skipp025 at yahoo.com : Shane wrote: : I was given this a while back by a friend, unfortunately he had back wired : it and ended its life, does anyone know or recognise this kit/circuit? as I : really need to get hold of parts list/ schematic. : here are some pics. : http://homepage.ntlworld.com/shane.rea/keyer/1.jpg : http://homepage.ntlworld.com/shane.rea/keyer/2.jpg : http://homepage.ntlworld.com/shane.rea/keyer/3.jpg : http://homepage.ntlworld.com/shane.rea/keyer/4.jpg : http://homepage.ntlworld.com/shane.rea/keyer/5.jpg : Thanks in advance for any info : Shane |
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