[CW] Iambic Keyers

[sbjohnston at aol.com]

I miss the Curtis 8044 keyer ICs.  I built several keyers in my early ham career using that IC and it performed flawlessly.   Designs based on it had a simplicity that really appealed to me, and worked nicely.
After production ended, I watched the hamfests for old keyers I could pick up inexpensively to get the Curtis chip.  But I rarely encountered them.  

I eventually focused my keyer projects on kits that used PIC microcontrollers.  Such as
https://www.k1elsystems.com/keyers.html
These designs allow memories and other advanced features (such as keyboard keying) but it was fun to recognize that they were all striving to do the basics as good as the Curtis keyers. 

Attached is the IC application note. 


Steve WD8DAS   

sbjohnston at aol.com   
http://www.wd8das.net/   http://af4k-crystals.com/   
--------------------------------------------------------------------   
Radio is your best entertainment value.   
--------------------------------------------------------------------   

Mein Ohr ganz nah am Weltempfänger...


 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/cw/attachments/20240726/0db328e5/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Curtis 8044 app note.pdf
Type: application/pdf
Size: 475912 bytes
Desc: not available
URL: <http://mailman.qth.net/pipermail/cw/attachments/20240726/0db328e5/attachment.pdf>