[TowerTalk] RG-316 choke cables

[Bob Nielsen]

Yes, I meant the dielectric!  Sorry about the "senior moment".

Bob, N7XY

On Feb 1, 2007, at 4:23 PM, Bob Maser wrote:

> When you say that RG316 has Teflon center conductor, you must mean  
> that the dielectric is made of Teflon, certainly not the center  
> conductor, which is certainly made out of a copper alloy.
> Bob W6TR
> ----- Original Message ----- From: "Bob Nielsen" <nielsen at oz.net>
> To: "Bob Alexander" <realex at flash.net>
> Cc: <towertalk at contesting.com>
> Sent: Thursday, February 01, 2007 7:03 PM
> Subject: Re: [TowerTalk] RG-316 choke cables
>
>
>>
>> On Feb 1, 2007, at 2:24 PM, Bob Alexander wrote:
>>
>>> RG316 is a .1" diameter cable with an unlikely 1250 Watt average  
>>> power
>>> rating at 10 MHz.
>>> Has anyone used short lengths of this cable to make choke baluns
>>> for low
>>> band use?
>>> My searches have yielded no info.
>>
>> The reason that RG-316 has a power rating that appears to be a bit
>> high is that it has a teflon center conductor, which can take high
>> temperatures.  It will probably get extremely hot at 1250 watts,
>> which is probably not what you want for a choke balun, as the ferrite
>> characteristics could be adversely affected.  It would probably work
>> fine for power levels up to at most a few hundred watts.  For higher
>> power, RG-142 or RG-400 (similar, but 142 has a solid copperweld
>> center conductor while 400 has a stranded conductor) would be a
>> better choice, while still physically small (0.195 O.D.)
>>
>> 73 - Bob, N7XY
>>
>>
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