Did you follow the specs. Peter ?
Not all " N " are " N ". Most of them are just " N " like
I found for AMP " N" temp environmental features from -65°C to + 165°C
( Temp schock Mil std 202 method 107 condition B )
But as you find out even coax have specs; Supose in your severe weather
conditions a "Low Cost" coax would not do the job either.
Jos on4kj
----- Original Message -----
From: "Peter Sundberg" <sm2cew@telia.com>
To: <TexasRF@aol.com>
Cc: <towertalk@contesting.com>
Sent: Saturday, September 06, 2003 7:53 AM
Subject: Re: [TowerTalk] N connectors
> I have done away with N-connectors in my VHF EME array as they are failing
> during cold winter days. The problem is that at low temperatures (I live
at
> 65.4N...) the center conductor of the coax gets shorter and the center pin
> of the N-male is pulled out of the socket hence making poor contact. A
> split second of 2kw RF vaporizes the center pin..
> After having multiple failures during cold winters I now use PL259/SO239
of
> good quality at the relay and as for the driven elements and powerdividers
> I have soldered the coax direct and done away with connectors.
>
> I dont think these problems will occur in places where the temperature
> swing is somewhat less than -40C -> +35C....
>
> 73/Peter SM2CEW
> www.qsl.net/sm2cew
>
>
>
>
> At 15:04 2003-09-05 , you wrote:
> >It is well known among vhf/uhf operators that N connectors will survive
> twice
> >legal power through 432mhz with reasonable vswr. Even at 1296mhz they
> survive
> >full legal power with low vswr.
> >
> >As others have mentioned, they will fail at any frequency under fault
> >conditions. Heck, I even managed to smoke a 7-16 Din connector when the
> shield let
> >loose on a 1296mhz PA output connection. The screen trip circuit would
have
> >saved it if I had realized that the fault was external to the PA . You
> live and
> >(hopefully) you learn!
> >
> >73/k5gw
> >_______________________________________________
> >
> >See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
> Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with
any
> questions and ask for Sherman, W2FLA.
> >
> >_______________________________________________
> >TowerTalk mailing list
> >TowerTalk@contesting.com
> >http://lists.contesting.com/mailman/listinfo/towertalk
> >
>
>
> _______________________________________________
>
> See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
_______________________________________________
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