[TowerTalk] RFC400

[Perry - K4PWO]

I have used some of Shireen's LMR-400 clone coax on HF and VHF and it was 
fine.  However, the batch I got about 3 years ago had a "pure" copper center 
conductor.  The current coax has the typical copper "flashed" aluminum 
center conductor, at least the last time I looked at the Web site it did. 
Some people warn that low HF frequencies may experience greater loss due to 
aluminum's higher resistance since skin effect is less important.  In my 
experience, I've never had a problem but my longest runs are under 200'.
I've also used the L-Com's clone coax with good results at HF, and 2 meters 
to 70 cm.

73 de Perry - K4PWO


--------------------------------------------------
From: "Kurt Cathcart, KR2C" <Kurt at KuhlRoad.net>
Sent: Friday, February 26, 2010 09:08 AM
To: "Tower and HF antenna construction topics." <towertalk at contesting.com>
Subject: Re: [TowerTalk] RFC400

> Here is a link to the spec sheet for the cable.
> http://www.shireeninc.com/images/cables/coaxcable-sheet.pdf
>
> It appears to me like it's the same as the Times product and the vendor
> tells me it is made in the same factory.  I know it's all just numbers
> on paper so I'm looking to see if anybody has any experience with it.
>
> -Kurt
> KR2C
>
>
> On 2/25/2010 9:05 PM, Jim Brown wrote:
>> On Thu, 25 Feb 2010 15:34:15 -0500, Kurt Cathcart, KR2C wrote:
>>
>>
>>> Does anybody have any opinions on RFC400.  It's touted as an equivalent 
>>> to
>>> LMR400.
>>>
>> Touted is the right word.
>>
>> Who makes the cable? What are its published specifications? At a minimum,
>> you should be able to find the following information on the website of 
>> the
>> mfr, the mfr should be clearly identified, AND printed on the cable. The
>> REAL cable mfrs --  Belden, Commscope, Andrew, and Times (LMR) publish 
>> this
>> all of this info on their websites.
>>
>> Construction of center conductor (i.e., diameter, material,
>> solid or stranded, CCS or copper coated Al)
>>
>> Construction of shield (i.e., copper braid, tinned copper braid,
>> copper plus Al, etc.)
>>
>> DC resistance of center conductor
>>
>> DC resistance of shield
>>
>> Dielectric material
>>
>> Jacket material
>>
>> Impedance
>>
>> Velocity factor
>>
>> Capacitance
>>
>> Attenuation at 1 MHz, 10 MHz, 30 MHZ, 50 MHz
>>
>> Weight
>>
>> 73,
>>
>> Jim Brown K9YC
>>
>>
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>
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