[Amps] Filament Xfmr

[Carl]

There are plenty of non Teflon insulations that go from 105C to higher. 
Modern vehicles have gone to 175-200C wiring in some areas as a means of 
reducing copper weight..

Carl
KM1H


----- Original Message ----- 
From: <Gudguyham at aol.com>
To: <n4kwpete at centurylink.net>; <amps at contesting.com>
Sent: Sunday, July 08, 2012 1:17 PM
Subject: Re: [Amps] Filament Xfmr


> If the wire is Teflon it will probably be fine.  Can you tell if it  is?
>
>
> In a message dated 7/8/2012 1:01:03 P.M. Eastern Daylight Time,
> n4kwpete at centurylink.net writes:
>
> I  ordered a filament transformer for a 4CX1500B linear that I am 
> building.
>
> When I received the transformer all looked great to me except for the
> secondary pigtail wires.  The tube requires 6vac at 10amps, the  pigtails
> provided are about five inches long and are a #18 well insulated  wire.
> Being concerned with the wire size it put the transformer under load  and
> drawing 10amps  left it that way for about an hour.  The  wire did not 
> over
> heat in that time but hey how about hours of  operating.  Should I be
> concerned with the wire size.  I have  looked for information on how to
> figure how much current various wire  sizes can carry and at various
> voltages
> and have not found  anything.
>
> 73 Pete  N4KW
>
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