[TMC] [Boatanchors] a stuck Jennings Vacuum Variable.

[Mark Foltarz]

John,

  It is my belief that the shaft merely "pushes and pulls"  the bellows in and out.
And yes, good idea on the patent diagram. 

It looks like the Machlett vacuum variables are very similar in design.
And from what I can see, it seems that the brass collar is hanging up on something.
If I gently apply a twisting force to the brass collar I can see the bellows move slightly.
It is like it "wants" to move. Just something holding it back


Mark



>________________________________
> From: Mark Foltarz <Foltarz at rocketmail.com>
>To: "jfor at quikus.com" <jfor at quikus.com> 
>Cc: "amradio at mailman.qth.net" <amradio at mailman.qth.net>; "boatanchors at mailman.qth.net" <boatanchors at mailman.qth.net>; "tmc at mailman.qth.net" <tmc at mailman.qth.net> 
>Sent: Thursday, January 5, 2012 1:20 PM
>Subject: Re: [Boatanchors] a stuck Jennings Vacuum Variable.
> 
>
>John,
>
>
> I'm thinking this cap must have been really driven in
>The collar for the shaft is off the cap.
>The shaft threads in and out but the bellows are stationary in the "driven in all the way" position.
>
>
>de KA4JVY
>
>
>Mark
>
>
>
>>________________________________
>> From: J. Forster <jfor at quikus.com>
>>To: Mark Foltarz <Foltarz at rocketmail.com> 
>>Cc: "amradio at mailman.qth.net" <amradio at mailman.qth.net>; "boatanchors at mailman.qth.net" <boatanchors at mailman.qth.net>; "tmc at mailman.qth.net" <tmc at mailman.qth.net> 
>>Sent: Thursday, January 5, 2012 12:51 PM
>>Subject: Re: [Boatanchors] a stuck Jennings Vacuum Variable.
>> 
>>I don't but perhaps some light penetrating oil into the thread mechanism?
>>Was it screwed into the stop hard?
>>
>>-John
>>
>>============
>>
>>> Group,
>>>
>>>   Has anyone ever run across a vacuum variable that is stuck with the
>>> bellows fully expanded ?
>>>   I have one where the bellows are stuck open.
>>>   No electrical short.
>>>   It is a Jennings UCF 500 series glass vacuum variable.
>>>   Hoping someone has has experience with this problem.
>>>
>>>  
>>>
>>> tnx 
>>>  
>>>    de KA4JVY
>>>  
>>>    Mark
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>>
>>
>>
>>
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