>>While researching the topic of receiving arrays it seems
>>that I read
>>in ON4UN a rather ominous recommendation that foam
>>dielectric be
>>avoided for use as phasing lines, the reason being that
>>the VF does
>>not remain constant with time & temperature. He
>>recommended using
>>only solid dielectric coax for that purpose. I know this
>>isn't what
>>you wanted to hear, but it may save you a lot of grief
>>down the
>>road. I will try to find the exact paragraph in the
>>latest ON4UN book.
I've never heard of that concern before.
We certainly never worried about it in BC systems (they
almost exclusively used foam dielectric cables) and I never
worry about it in my Ham stuff. I can't imagine why the foam
cable would be any worse than any other cable of similar
quality.
73 Tom
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