Topband: Insulator problems

[GALE STEWARD]

The HN is a tough connector. At my former employer we used to run close to 2.5 KW thru them into fairly reactive loads. This was in the 130-180 Mhz freq range. I don't remember ever seeing one fail.

73, Stew K3ND






________________________________
 From: "John Harden, D.M.D." <jhdmd at bellsouth.net>
To: topband at contesting.com 
Sent: Monday, December 16, 2013 11:31 AM
Subject: Re: Topband: Insulator problems
 

Because of a current/voltage node I was toasting SO-239's (FORGET Type
"N"'s).... I went to Amphenol Type "HN" connectors in the 160 tuning box
at the base of the tower. It NEVER arcs now, ever.....

http://www.amphenolrf.com/products/hn.asp?N=0&sid=52AE42803C4E617F&

They are not cheap, but they work great...

73,

John, W4NU


On 12/16/2013 11:16 AM, Charlie Cunningham wrote:
> You might consider polycarbonate. (GE calls it "Lexan")
> 
> It's very strong both mechanically and electrically, and it's machinable.
> 
> 73,
> Charlie, K4OTV
> 
> 
> -----Original Message-----
> From: Topband [mailto:topband-bounces at contesting.com] On Behalf Of Jim GM
> Sent: Monday, December 16, 2013 10:58 AM
> To: topband
> Subject: Re: Topband: Insulator problems
> 
> Not sure what your replacing if it is a round insulator piece for 2 pipes
> or stand off type insulator for matching section or what?
> 
> Try fiberglass rod material or Teflon blocks depends on application.
>  Teflon blocks were used on heavy industrial equipment when shipped so the
> equipment can be slide over the floor.
> 
> Bird poop will short things out no matter what you use!!
> 
> 
> 

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