{Collins} Re: DeOxit

"Dennis Monticelli" <dennis.monticelli@xxxxxxxxx> · Mon, 31 Dec 2007 16:00:31 -0800

It is always wise to use DeOxit sparingly.  I prefer the 100% solution
applied directly via needle applicator or Q-tip an avoid drowning the
area with the commonly available 5% spray.   The 100% stuff is also
very effective.  But I have never had a HV problem even when forced to
use the spray to get into hard to access areas.  I have certainly
worried about the potential conductivity problem and did contact Caig
Labs before using it on the HV ceramic wafers on my Johnson Matchbox
Jr.  I was told that it is not conductive after it dries, but under no
circumstances should power be applied when wet.  The more you drown
the switch the more you have to wait.  The more you drown the switch
the more risk that phenolic wafer sections will swell up.  And pots
can take an especially long time to dry because you have to spray them
and the ventilation is poor.

Bottom line: Always use DeOxit sparingly and always let it thoroughly
dry before applying power.  But don't not use it; it's great stuff.

On Dec 31, 2007 2:32 PM, George Babits <gbabits@xxxxxxxxxxxxxxxxxx> wrote:
> Yes, be careful where it goes.  If it gets into the bottom of an IF can when you
> are cleaning the bandswitch (I've had that happen on Hammarlunds) it will short
> out the aluminum?mica capacitor in the can and you will need a new IF can.
>
> George
> W7HDL
> ----- Original Message -----
> From: "Bob W5UQ" <W5EUQ@xxxxxxxxxxx>
> To: <James_Kern@xxxxxxx>
> Cc: <collins@xxxxxxxxxxxxx>
> Sent: Monday, December 31, 2007 3:17 PM
> Subject: {Collins} Re: 75A-1 problem
>
>
> _*RE DeOxit......Warning.*_*   *BE CAREFUL with putting DeOxit on
> circuits that have voltage on them.  It is NOT like the spray cleaners
> one may be used to.  DeOxit can and will CONDUCT.  It can cause burning
> where voltages are present.  Use DeOxit sparingly and ONLY with the
> radio turned OFF.
>
> I try to use it on a cue tip or if I spray it, like inside a
> potentiometer, after turning the pot several times, I use tuner wash to
> clean the extra DeOxit off.
> IF used on band switches with 250 volts on the switch, it can cause
> BURNING and may damage the switch.  Be sure to wash the extra DeOxit off
> the Bakelite before applying voltages.
>
> I love DeOxit, but it can damage circuits too if used incorrectly.  You
> were lucky if you sprayed it on active circuits and it didn't cause you
> problems in the past.
>
> Happy New Year everyone....  Bob   W5UQ
>
>
>
> Kern, James wrote:
> >
> > Wow, I had no idea that the problems could be caused by tube socket
> > screws or aluminum shields! Thanks for all the suggestions, it looks
> > like I have some work ahead of me. I've got a few other receivers I
> > need to order caps for, looks like I'll be adding another! I think
> > I'll be an expert at re-capping and re-aligning after all is said and
> > done. Thanks again,
> >
> >
> >
> > James KB2FCV
> >
> >
> >
> > ------------------------------------------------------------------------
> >
> > *From:* Donovan W. Case [mailto:dwcase@xxxxxxxxxxxxxxx]
> > *Sent:* Monday, December 31, 2007 12:38 PM
> > *To:* Kern, James
> > *Subject:* Re: {Collins} 75A-1 problem
> >
> >
> >
> > Hi James
> >
> >
> >
> > I had the same issue with my 75A1, and have heard of others
> > experiencing the same thing.  I tightened all the tube socket screws,
> > cleaned the sockets, and cleaned all of the varible coils (sprayed
> > inside where the iron core moves).  The problem disappeared.  I used
> > MG chemicals super contact cleaner with poly phenyl ether.  _*Deoxit
> > works well, too. *_
> >
> >
> >
> > I noticed there was a fine iron oxide residue appeared with the spray
> > cleaner.  It made me think there was some surface rust starting on the
> > iron.
> >
> >
> >
> > Hope that helps.
> >
> >
> >
> > 73
> >
> >
> >
> > Donovan
> >
> > VE1BDC
> >
> > ------------------------------------------------------------------------
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SHARE THE FUN: JOIN THE COLLINS COLLECTORS ASSOCIATION TODAY !
      http://www.collinsradio.org/membership/    -paypal accepted-
.
 NETS: Tues & Thur: 3.805 MHz-2000 Central + Fri: 3.895 MHz-2000 Pacific
  SUNDAYS: 14.263 MHz-2000 UTC  +  AM Net: 29.050 MHz-1200 Central
       1st Wednesday AM Net 3.880 MHz-2000 local (ET, CT, MT, PT)