[Hallicrafters] Hallicrafters Digest, Vol 95, Issue 13

[James Liles]

Hi Bob:

For the bearings in a tuning capacitor, the bronze gears, and bushings in 
any of these radios ---- USE ONLY SYNTHETIC CLOCK OIL!  It is refined with 
short string molecules and does not dry out or oxidize.  If you use grease 
it will drag debris and dust into the gear or bearing whereas clock oil will 
drive it out.  You can buy clock and watch oil at most clock shops or go to 
your local hobby shop and buy an ounce of the oil that is used to pickle the 
two and four stroke engines: it is the same as clock oil.  The only 
difference between clock and watch oil is the viscosity.  Clock oil is used 
to lub the gear train parts and watch oil can be used to lubricate meter 
movements as it is very light.

The use of grease specifically in tuning cap ball bearings comes to no good 
end.  It will eventually bind enough to overwhelm the anti backlash gears.



Kindest regards Jim K9AXN

------------------------------

Message: 3
Date: Fri, 16 Dec 2011 07:27:21 -0600
From: "Bob Fay" <rfay at charter.net>
Subject: [Hallicrafters] Tuning capacitor grease info
To: <hallicrafters at mailman.qth.net>, "Hammarlund Radios"
<hammarlund at mailman.qth.net>
Message-ID: <000001ccbbf6$71246020$536d2060$@charter.net>
Content-Type: text/plain; charset="us-ascii"

What type of grease is used to lubricate the shaft bearings on tuning
capacitors? Also what is the best way to clean between the plates of the
tuning cap? The problem I am having is scratchy audio as the radio is tuned.



Bob    WC0D