1) Replace the lamp with a fresh one and wait for it to drift upward (that
could buy you a year or many years).
2) Reduce the value of the dropping resistor and take a chance that the
transistor won't break down under the extra voltage present.
3) Upgrade the transistor to a high voltage
- Original Message -
From: Don Cunningham d...@martineer.net
To: Fred or Ski wb8...@frontier.com; drakelist
drakelist@zerobeat.net
Sent: Tuesday, September 06, 2011 8:13 PM
Subject: Re: [Drakelist] R4B PTO indicator...
Ski,
I haven't done this, but saw a hint once that you could
Revesing the leads is about as much work as replacing the lamp and I
am not sure it works.
I swapped my neon lamp leads on the PCB, not at the panel. About a minute
of easy soldering and well worth the try.
Paul, W9AC
___
Drakelist mailing
Thanks, Paul, I wanted to say it was that easy, but as I said, I haven't
been there so wasn't sure. It wasn't worth tearing the case off mine to
see, hi.
73,
Don, WB5HAK
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Drakelist mailing list
Drakelist@zerobeat.net
This is a fairly common problem.
The strike voltage of the neon lamp tends to drift upward with age. The
transistor used by Drake to switch the voltage does not have a high
breakdown voltage so Drake used a resistor voltage drop to reduce the
available voltage to barely enough to strike the
Clean adj the cable/jack for the PTO control signal on the two units.
73,
Lee
-Original Message-
From: Fred or Ski wb8...@frontier.com
To: drakelist drakelist@zerobeat.net
Sent: Tue, Sep 6, 2011 11:05 pm
Subject: [Drakelist] R4B PTO indicator...
I have an intermittant PTO indicator
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