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W3WN
01-05-2010, 03:34 PM
I know the old Curtis Keyer chips (8043, 8044, 8044ABM) are long out of production.

Out of curiousity, is there a modern day equivalent of this chip available from anywhere?

...yes, I know Curtis sold the line out to MFJ when the company went away, and that for a time they had a chip called the 8045ABM; but I can't find any mention of it on their site, so it to may have gone away too...

kf0rt
01-05-2010, 04:18 PM
You might look at the K1EL chip, Ron.

http://k1el.tripod.com/K10.html

Not sure if you're looking for pin compatibility, but this thing does quite a lot.

There's also the Jackson Harbor stuff here (they appear to sell just the chip):

http://home.att.net/~jacksonharbor/pk4ssr.htm

Most of these things these days are preprogrammed PIC-based microprocessors, or similar; doesn't cost a lot for the whole kit.

N8YX
01-05-2010, 06:05 PM
There is source code floating around that allows a Parallax BASIC Stamp to function as an iambic keyer.

Another alternative is to find a junked FT-901 or 902. Its integrated keyer used an 8043 (early version) or an 8044 (later, after production lot 8).

N8YX
01-05-2010, 06:06 PM
And for all of you eBay haterz:

http://cgi.ebay.com/Curtis-8044-ABM-keyer-board-and-8044ABM-chip-new_W0QQitemZ220534082999QQcmdZViewItemQQptZLH_Def aultDomain_0?hash=item3358db0db7

kf0rt
01-05-2010, 06:18 PM
And for all of you eBay haterz:

http://cgi.ebay.com/Curtis-8044-ABM-keyer-board-and-8044ABM-chip-new_W0QQitemZ220534082999QQcmdZViewItemQQptZLH_Def aultDomain_0?hash=item3358db0db7

Schweet! At one time, I wanted to roll my own from scratch, but after looking at the K1EL chip, picked a different project for PIC-type learning. Ended up putting the K1EL board into my project -- it's pretty nice. Added a cheap LCD display and it'll do anything from iambic with paddles to full keyboard. The guy put a lot of thought into it.