[Heath] [Heathkit:Yahoo] SB-401 stiff neutralizing capacitor won't turn

[G3OOU at aol.com]

Hi Rob
 
A tiny drop of lubricating oil on the front shaft should do the trick but  
it will need to find its way into the inner shaft area which you can help 
with  gentle rotation of the shaft. I use an Electrolube spray which has a 
lubricant  in a volatile carrier and a tissue under the target area to catch 
any excess  spray. Keep the lubricant off the body of the trimmer.
 
73

Bob

Bob F Burns G3OOU
C  Eng, FIET, MSE
G-QRP 6907
Secretary of Crystal Palace Radio &  Electronics Club: www.g3oou.co.uk
Technical web site:  www.qsl.net/g3oou
@BobFBurns on Twitter: http://twitter.com/BobFBurns  

 
In a message dated 22/12/2013 10:12:21 GMT Standard Time,  
rsmyers at rogers.com writes:

 
 
 
The small variable capacitor used for neutralizing the finals on my  SB-401
(inside the finals' cage) has become very stiff. Now, during  the
neutralizing procedure, it will break or bend the tip on a plastic  tuning
screwdriver, and it won't turn. It can be made to turn if you use a  small
metal shaft type screwdriver, but that is not a practical option as  it
throws off the capacitance value as soon as you insert it.

Does  anyone know of a method for loosening up this part again?

Thanks,
--  Rob Myers
VE3JQL


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