[WriteLog] Need HELP wih W5XD keyer

[Barry Kutner]

Tim,
I had a similar problem. Not with an XD keyer, but my own keying 
interface. The optos worked fine for the RTTY FSK keying, but 
didn't work for CW. So, I swapped out the opto for a standard 
2N2222 (or equiv) keying circuit. This was also on a 990. Maybe 
something's weird in the keying line - dunno.
73 Barry

On 21 Oct 00, Timothy R. Mohr , AA9RR wrote:

> 
>  I just finished assembling my W5XD keyer, and seem to have run into a
> problem. My rig does not seem to key up at all! I hooked an oscope to pin 17
> of U2, and I can see the CW is being sent. But it looks like the opto
> isolator isn't doing squat. I had to use the alternate part, the
> H11A817CQT-ND in my construction. Do I have to change the biasing of R3 and
> R4 ? I am trying to key up a FT-990. Any help would be appreciated!!!!!
> 
> 73,
> Tim Mohr
> AA9RR
> 
> 
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--
Barry Kutner, W2UP              Internet: w2up@mindspring.com
Newtown, PA         FRC         alternate: barry@w2up.wells.com

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