[Kenwood] TS-520S Transmit Problems

Wed, 6 Mar 2002 03:48:56 -0800 (PST)

As one of you auggested (and I apologize that I
inadvertently deleted the message so I can't give him
proper credit), I tried moving the mode switch from
USB to LSB and the problem didn't follow, so I worked
the mode switch back and forth sevral times and the
problem on USB seems to have gone away.  Only time
will tell if this fix is permanent.  I will keep you
posted.

Thanks to all for your help and comments.

73 de Gary WA1TJB
--- Leslie Zwiebel <[email protected]> wrote:
> 	Gary, if you'd be so kind, Please let me (or the
> reflector) know what
> you learn, it's a good question.
> 	Thanks.
> 	(((((73)))))
> 	Les
> 
> Gary Smith wrote:
> > 
> > I have an intermittent transmit problem with my
> > TS-520S.  Periodically, when I am operating SSB, I
> > lose transmit power.  While the microphone button
> is
> > depressed and the meter is in the ALC position,
> the
> > meter needle, along with the watt meter on my MFJ
> > antenna tuner, drop slowly to zero.  If I switch
> over
> > to CW and turn on the send switch, I get the full
> 100
> > watts out with no problems and no fading, so I
> don't
> > think there are any problems with the finals.  I
> have
> > the service manual and have been looking over the
> > schematics.  I am wondering if the problem could
> be a
> > failing RL-1 control relay or RL-2 final relay? 
> If I
> > let the radio sit for a few minutes, I can key the
> mic
> > and get normal output levels, at least for a few
> > minutes.  The problem seems to be getting
> gradually
> > worse.
> > 
> > Has anyone else had a similar problem?  Any
> > suggestions for what I should do next?  If it is
> > likely that it is one of these relays, does anyone
> > know where I can buy replacements?
> > 
> > Thanks in advance for your help.
> > 
> > 73 de Gary WA1TJB
> > 
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