[Premium-Rx] Lubricants for electronics

W4NJ w4nj at tampabay.rr.com
Fri Oct 24 16:09:27 EDT 2014 

Please stop with all these lubricant posts! My wife is wondering what the heck is going on with Premium Receiver collectors!

On Oct 24, 2014, at 2:22 PM, ONL4234 <ONL4234 at telenet.be> wrote:

> A puff of pure graphite powder into a recalcitrant & irreplaceable old potentiometer will indeed work wonders.
> 
> Peter De Coninck ONL4234 aka AmpDoctor
> 
> ----- Original Message ----- From: "Gary Geissinger" <ggeissinger at digitalglobe.com>
> To: <premium-rx at mailman.qth.net>
> Sent: Friday, October 24, 2014 8:13 PM
> Subject: Re: [Premium-Rx] Lubricants for electronics
> 
> 
>> I have been restoring aircraft radio gear from WW-2. Often these include dynamotors that need to have the bearings cleaned and lubricated. After considerable research tracking through old and new military specifications I have settled on AeroShell 33 grease for bearings, gears, slide plates, and bushings.  First the old lubricant must be removed using Stoddard Solvent which in reality is little more than kerosene. Isopropanol also removes many lubricants as well.
>> 
>> I have been using AeroShell 33 on the appropriate locations in SP-600 and R-390 receivers as well.  It doesn't take much and certainly reduces friction and wear while it "stays put."  I haven't seen the migration that silicone based lubricants exhibit.  It is synthetic Lithium grease and so far hasn't damaged any non metallic items I have tested.  By military specification it doesn't smell "rancid" like many common lubricants do.
>> 
>> Aircraft Spruce sells AeroShell 33 in rational quantities (tube for grease gun).  I bought a can of solvent from NAPA (big can).  I spoke with a chemist with the company who formulates the solvent for NAPA.  He finally admitted that is essentially Stoddard Solvent.
>> 
>> Gary WA0SPM, member US Army MARS
>> 
>> Sent from my iPhone
>> 
>>> On Oct 24, 2014, at 11:52 AM, "Peter Gottlieb" <hpnpilot at gmail.com> wrote:
>>> 
>>> Interesting, thank you.
>>> 
>>> Peter
>>> 
>>> 
>>>> On 10/24/2014 1:49 PM, watkins-johnson at terryo.org wrote:
>>>> My two preferred lubricants for electronics are Mobil 1 for places
>>>> requiring a thin lubricant that doesn't squeeze out and Phil Woods
>>>> Waterproof Grease (designed for bicycles) for places requiring a thicker
>>>> lubricant.
>>>> 
>>>> I started using Mobil 1after a tip from the R-390 users group.  In my
>>>> experience with multiple premium receivers it doesn't creep onto
>>>> surrounding surfaces.  I would use this on a tuning shaft any day.
>>>> 
>>>> I first used the Phil Woods Grease while rebuilding my second R-389 (I was
>>>> young, strong, and foolish once), which has the most leaden manual tuning
>>>> knob of any receiver I've ever owned.  It didn't work miracles but the
>>>> tuning was much better than the first one I rebuilt.
>>>> 
>>>> Once of the stranger lubricant tricks I ever picked up was from a guitar
>>>> amp technician.  If you have a noisy and irreplaceable potentiometer,
>>>> Lock-Ease graphite lock spray works great for filling in the noisy pits on
>>>> a degrading pot.  The trick is to use it sparingly and infrequently. This
>>>> is a tip that can go bad in electronic circuits in a hurry, but sometimes
>>>> it's the only option.
>>>> 
>>>> Terry O'
>>>> http://watkins-Johnson.terryo.org
>>>> http://BlackRadios.terryo.org
>>>> 
>>>> 
>>>>> Hi Boris!
>>>>>  I would caution against using silicone spray in electronics: When I was
>>>>> in industry, it was explained to me that silicones can break down into
>>>>> lesser products, i.e. Silicon Dioxide (SiO2), or sand!  It might be
>>>>> permissible to use it on a shaft, but I would rather use something like
>>>>> Kroil, or another penetrating oil to get a stuck part moving, then
>>>>> gradually work more light oil into it to flush out rust, and afterwards
>>>>> use a drop or two of heavy synthetic oil.  Just my two cents worth...
>>>>> 73,   Tom Herman, PhD., CETma. N1BEC/7
>>>>> 
>>>>>> From: ua3mcj at mail.ru
>>>>>> To: cfuller1 at gmail.com
>>>>>> Date: Fri, 24 Oct 2014 08:39:21 +0400
>>>>>> CC: Premium-Rx at mailman.qth.net
>>>>>> Subject: Re: [Premium-Rx] Collins HF-2050
>>>>>> 
>>>>>> Hello Chris,
>>>>>> 
>>>>>> At first find location of bearing in main tuning shaft, spray it with
>>>>>> Silicone Spray, rotate knob back and forth some few minutes it became
>>>>>> ease to move after that.
>>>>>> Then add  few drops of synthetic oil ( oil must NOT became dry with the
>>>>>> time).
>>>>>> 
>>>>>> Make some inspection, probably  few more bearings there, if so do the
>>>>>> same with them.
>>>>>> 
>>>>>> Also check for rust in the shafts sleeves there, if yes, use rust
>>>>>> remover.
>>>>>> Remove dust, dirt with pressed air if compressor available. Remove all
>>>>>> old, dryed grease if used in and replace with fresh one...Then enjoy
>>>>>> with smooth tuning knob rotation...
>>>>>> 
>>>>>> B.R.
>>>>>> Boris
>>>>>> UA3MCJ
>>>>>> 
>>>>>> 
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