[R-1051] Fuses

[tim grieco]

That I am aware of and have experienced it as well. Thank you very much.
Tim
----- Original Message ----- 
From: "Steve Hobensack" <stevehobensack at hotmail.com>
To: <r-1051 at mailman.qth.net>
Sent: Monday, February 07, 2005 6:15 PM
Subject: RE: [R-1051] Fuses


> The same thing happens to the hi-tension terminals on the r-390a power 
> transformer.
> ....Steve...N8YE
>
>>From: "Geoff Fors" <wb6nvh at mbay.net>
>>Reply-To: R-1051 Discussion Group <r-1051 at mailman.qth.net>
>>To: <r-1051 at mailman.qth.net>
>>Subject: [R-1051] Fuses
>>Date: Mon, 7 Feb 2005 15:53:25 -0800
>>
>>A couple of years back I posted a comment regarding blown fuses on 1051's.
>>I have found that sometimes the high voltage terminals of the power
>>transformer arc to ground through the rubber seal between the case and
>>porcelain insulator.  Apparently the rubber becomes conductive with age 
>>due
>>to carbon content.  Anyway, the transformer can be repaired by carefully
>>crushing the porcelain insulator sleeve, digging out all traces of the
>>rubber seal, and creating a new seal and insulator out of good quality 
>>epoxy
>>such as J-B Weld (pay no attention to the "steel" logo on JB Weld; it 
>>hipots
>>well past 1 KV!)
>>
>>This problem sometimes shows up as intermittent fuse blowing, but usually
>>once the arc starts it carbonizes the whole seal and creates a constant
>>low-resistance short to the case.
>>
>>Geoff Fors
>>
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>
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