[WriteLog] W5XD Multi+ and PTT outputs

[Richard L. King]

I have a new W5XD keyer and have seen the same problem on an intermittent 
basis.

I went through and made sure that all the RCA plugs to the Mark V were 
seated as securely as possible and that my foot switch has as much internal 
resistance as possible. But still the same problems occurs here once in a 
while and it is maddening when it happens.

The problem manifests itself when I push the foot switch and the 
transmitter PTT keying goes on and off in an irregular cycle.

The keyer seems to be intolerant of connections in the PTT input lines that 
have a small amount of resistance in them. My foot switch seems to have 
enough internal resistance that it sometimes allows the PTT circuit to just 
drop out briefly.

I use two Mark Vs in SO2R and it happens to either transceiver, depending 
on which one I am using. So the problem seems to be in the keyer's 
intolerance to my foot switch. The foot switch works fine when connected to 
the rigs directly.

73, Richard K5NA

At 11:15 PM 11/27/2003, Nick Lekic wrote:
>Has anyone had any problems keying Mark V via W5XD keyer PTT-L and PPT-R 
>outputs?   This is not a software problem as PTT CW is set to "LTP 
>Pin16/COMM RTS" in Writelog's "Setup Ports" menu.
>Even if I try to key the PTT outputs via Foot Switch plugged into W5XD 
>keyer it doesn't work.
>
>CW keying works OK on both CW-L and CW-R outputs.
>I measured 5 v across CW OptoIsolator outputs and 13 volts across PTT 
>OptoIsolator outputs when CW an PTT is hooked up to the RIG and RIG is on 
>stand-by/
>PTT output voltage sinks down to only 10 volts when keyed either via foot 
>switch or Writelog.  Seems like not enough current can be drawn from 
>OptoIsolators to close Mark V's PTT circuit... or peraps my unit has a 
>hardware problem.
>
>I would appreciate any opinion from anyone who has it working. 73, Nick
>ve3ey
>
>
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k5na at texas.net