[WriteLog] W5XD keyer question

[Dennis Mowers]

Randy-A month or so ago, I posted a complaint that the W5XD keyer would 
not activate my TS-850 PTT lines.  I received several private emails 
from other TS-850 users that they had the same problem.

I believe the XD keyer PTT output switches are not fully saturated, and 
as I recall, are only switching to about .5 volts, not quite low enough 
to activate my PTT inputs.  I haven't seen any posts on other radios though.

I'm going to add an external transistor switch that is driven harder, 
and if that doesn't work, I will add a DPDT relay to hard switch the 
lines to ground. 

Hope to get to it this week.  But I wonder if anyone else has actually 
solved the problem, and how they did it.

Dennis K5YA

Randy Thompson, K5ZD wrote:

>I have a W5XD MK-1100 keyer that I have been using for several years.  It is
>a fantastic solution for SO2R!
>
>Getting ready for the upcoming CQWW Phone contest and a guest op that wants
>to use a footswitch (instead of VOX like I normally do).  I can't get the
>PTT outputs from the W5XD keyer to key the PTT of the FT1000D!
>
>Even when I put an ohmeter across the PTT output, it shows a lower
>resistance, but not enough to get the audio tone of my multimeter to key.
>So I see enough to believe that the PTT is being switched, but for some
>reason it doesn't pass enough current to pull in the rig PTT or even the
>multimeter audio signal.
>
>I am connected to the tip and ring (the first two of the three stereo
>connector pins).
>
>Port set up has PTT control set to "On LPT pin 16/COMM RTS)".  Have tried
>with "All mode PTT on CW port RTS" both checked and unchecked.
>
>Anyone else seen this?  Or have an idea of what I should try?
>
>Thanks!
>
>Randy Thompson, K5ZD
>k5zd at contesting.com
>http://www.k5zd.com
>
>
>
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