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Author Topic: Curtis Keyer chip  (Read 3343 times)
K4PJD
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Posts: 2




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« on: March 23, 2009, 12:44:51 PM »

I bought an old MFJ-422 Electronic Keyer and the main chip, a Curtis 8044B is fried.  I know they stopped making them long ago but I understand that while the 8044B is a 16-pin IC, the 8044M and the  8044BM are 18 pin packages, electrically equivalent, except that the 8044M/BM includes a sending speed function.  The 18-pin chips can be used in the 16-pin slot.  Does anyone have any of the above laying around or know where I could get one?
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KG4TKC
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Posts: 72




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« Reply #1 on: March 26, 2009, 04:30:51 PM »

     Good luck K4PJD. I am looking for an 8044ABM Curtis chip. All these chips seem to be very scarce.About like trying to find parts for a Johnson Matchbox. If I run across any extra chips in my search I will try to let you know.
                            73 es GL -KG4TKC
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W3WN
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Posts: 205




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« Reply #2 on: April 01, 2009, 12:24:38 PM »

See http://www.arrl.org/news/features/2002/02/04/2/?nc=1 for a nice history of the Curtis keyer line, including the 8044 chip family.

MFJ bought the line, and now produces the chip as the 8045ABM -- which may not be pin compatible with the older 8044 chips.

They still advertise Curtis keyers, so it sounds like they're still available.
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KG4TKC
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« Reply #3 on: April 20, 2009, 11:53:44 AM »

     The 8045ABM will not replace an 8044ABM. Took me a while to find out for sure. I have started looking at keyer kits to replace the whole board in my MFJ keyer. It is the one that fits on a Bencher paddle. I found one kit for 17 bucks that might fit in the enclosure. Those 8044ABM chips are next to impossible to find.73 es GL-KG4TKC
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W3PYF
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« Reply #4 on: March 13, 2010, 04:42:47 AM »

Could you tell me the source of your $17 keyer kit. I have concluded that the chip in my 1978 Nye Viking ssk-1-k keyer is fried, and I would like to just replace the whole board.I love the key itself, and its portability for mini-expeditions. melsnyder@gmail.com
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NR1X
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Posts: 32




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« Reply #5 on: March 13, 2010, 08:55:33 AM »

http://k1el.tripod.com/K12.html
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