[Test-Equipment] RTV 141T CRT

[cmos at shol.com]

I guess it depends on the RTV. There is some RTV
that are used on HV.

On the other hand I have used some highly conductive 
RTV for rf shielding.
The cheap stuff(nickle/graphite) is $70 a tube.
The costly aerospace stuff(pure silver) is thousands
per tube.

Jim,  

------- Original Message -------
>From    : WA5CAB at cs.com[mailto:WA5CAB at cs.com]
Sent    : 3/9/2010 12:35:05 PM
To      : test-equipment at mailman.qth.net
Cc      : 
Subject : RE: Re: [Test-Equipment] RTV  141T CRT

 Jim,

This has nothing directly to do with HP or CRT's or
etc.  But RTV contains 
Acetic Acid, which is conductive.  If it fails to
fully cure you have a 
leaky (electrically) situation.  I learned this (the
hard way) decades ago 
building "chill chasers" for mobile pipeline X-ray units.

In a message dated 3/9/2010 11:29:18 AM Central
Standard Time, 
cmos at shol.com writes: 
> Hello,
> 
> I am not as familiar with the cable
> on the 141T yet, I am still looking
> for a tube for my 141T.
> 
> But I have had a similar problem with an
> HP 17xx. The cable de-laminated and was arcing.
> I tried to rtv and what not, to no avail.
> Finlay I just decided to take the HV part 
> of that cable out of the equation. I cut the 
> ends of the HV part of that cable out and 
> just run some 20kv wire between the HV board
> and the crt anode. That solved that problem
> on the HP 17xx, I am not sure if that will be 
> as easy to do on the 141T.
> 
> Hope this helps,
> Jim
> 

Robert & Susan Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480
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