From: Eric Webner 
Subject: Re: [drakelist] TR7 frequency shift


Eric Webner  made an utterence to the drakelist gang
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I believe the wb4hfn wedsite has an article that discusses PTO cleaning and
lubricating (perhaps the one called "smooth as silk PTO tuning").
Check it out, it mentions the use of some special lubricant that has copper
in it. The purpose is to make sure the PTO shaft is well grounded. Maybe
that is the solution to the frequency shifting.
 
73,
 
Eric KA8FAN


Mike Williams  wrote:
Well, here is the problem...The Tr7 is solid with the exception of a slight
warble in the receiver.  When sitting on a frequency listening to a cw
signal or just tuned to the calibrator, the frequency will shift perhaps 80
 or 100 cycles.  Enough to be audible and annoying.  This started shortly
after I cleaned the main shaft of the PTO with De Oxit and followed up with
a clean q tip to remove the residue.  I have cleaned the PTO's on my 4 line
many times and not experienced this.  I think it is the PTO but I thought I
would throw this one out to the group for comments and advice.
 
As always, thanks for any input!
 
Thanks,
 
Mike W4DL

		
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I believe the wb4hfn wedsite has an article that discusses PTO
cleaning and lubricating (perhaps the one called "smooth as silk PTO
tuning"). Check it out, it mentions the use of some special lubricant
that has copper in it. The purpose is to make sure the PTO shaft is well
grounded. Maybe that is the solution to the frequency shifting.
 
73,
 
Eric KA8FAN
Mike Williams
<mj451{at}Bellsouth.net> wrote:




Well, here is the problem...The Tr7 is
solid with the exception of a slight warble in the receiver.  When
sitting on a frequency listening to a cw signal or just tuned to the
calibrator, the frequency will shift perhaps 80  or 100
cycles.  Enough to be audible and annoying.  This started
shortly after I cleaned the main shaft of the PTO with De Oxit and followed
up with a clean q tip to remove the residue.  I have cleaned the
PTO's on my 4 line many times and not experienced this.  I think
it is the PTO but I thought I would throw this one out to the group for
comments and advice.
 
As always, thanks for any
input!
 
Thanks,
 
Mike
W4DL
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