Commercial contact cleaner is pretty good, or denatured alcohol. People say
not to use rubbing alcohol because most of it contains a lot of water.

Braille paper makes a good contact abrasive. Don't use emery cloth or
anything actually abrasive.

tom Fowle WA6IVG

On Tue, Nov 03, 2015 at 02:48:47PM -0800, doug and sheilla emerson wrote:
> I have the same issue that several of you have discusdsed concerning the t m 
> v 71 A. I'd like to clean up the fuses and fuse holders and see if the 
> problem goes away. My question is: what type of cleaner should you use to 
> clean up the fuses and the holders. Someone else asked the same question a 
> few posts back. Doug, N6NFF
> 
> -----Original Message----- 
> From: George Smith
> Sent: Tuesday, November 03, 2015 2:36 PM
> To: [log in to unmask]
> Subject: Re: Interesting TMV71A Issue
> 
> clean up power connections.
> ----- Original Message ----- 
> From: "Tom Behler" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Sunday, November 01, 2015 6:17 PM
> Subject: Interesting TMV71A Issue
> 
> 
> > Hi, everyone.
> >
> >
> >
> > Well, last night, I got rid of the gremlin that was causing issues with my
> > ability to play selected audio files using Winamp, but now, another
> > gremlin
> > has appeared in my shack.
> >
> >
> >
> > This time, I'm experiencing a very strange problem with my Kenwood TMV71A.
> >
> >
> >
> > The problem occurs mainly when trying to transmit with high power on 440,
> > but it happens occasionally when trying to do so on 2 meters as well.
> > Basically, when I transmit with high power, especially on 440, the rig
> > shuts
> > off for a split second, but then comes back on.  It's almost as if the rig
> > is not happy transmitting on high power for some reason, again, especially
> > on 440.
> >
> >
> >
> > I discovered this issue late this afternoon, as I was doing my usual
> > monthly
> > tests of equipment, antennas, etc., at least as best as I can from here in
> > the shack at the home QTH.
> >
> >
> >
> > In trying to diagnose the problem, I have done the following things so
> > far:
> >
> >
> >
> > 1.  My first thought was that something has gone wrong with my outdoor
> > Diamond X200 VHF/UHF antenna, which is fed with RG9913 coax and is on the
> > roof of my house at a height of approximately 35 feet.  I took SWR, as
> > well
> > as forward and reflected power readings using my TW2.  Both on 2 meters
> > and
> > 440, adjusting the meter for each gand as I went.  my SWR's on each gand
> > are
> > between 1.2 to 1 and 1.3 to 1.  On medium power, my forward power on each
> > band is between 9 and 10 watts, and my reflected power is either at 0
> > watts
> > on 2 meters, or point 2 watts on 440.
> >
> >
> >
> > 2.  I then tried switching jumpers between my TW2, and the Diamond X200
> > connection on my MFJ window feed through panel.  Again, no change.
> > Admittedly, I haven't swapped all jumpers out, but at least the initial
> > jumper swap didn't change the results.
> >
> >
> >
> > 3.  I then did a V F O re-set on the TMV71A, with again, no change in my
> > results.  I'm a bit reluctant to do the full re-set, but may do so as a
> > last
> > resort, since I have the TMV71A programming cable, and also have all
> > memories and menu settings saved in a data file for the rig.
> >
> >
> >
> > One other thing I might try is to see if this happens with the TMV71A that
> > I
> > typically use when camping out at the RV.  It is here in my shack in a box
> > for the winter.
> >
> >
> >
> > Before I go too crazy with all this, though, I'd like to know whether
> > anyone
> > else has experienced this issue, and if there are other ideas out there
> > that
> > I might want to try.
> >
> >
> >
> > Thanks as always for the help.
> >
> >
> >
> > Tom Behler: KB8TYJ
> >
> >
> 
> 
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