Jeff,
Copper clad aluminum, rings not spiral, OD of outer conductor is 1”. OD of
inner is 3/8”. Outer conductor is copper. I think you are on right track.
Measurements were all done with a steel tape measure as best I could.
Thanks..Stan
Sent from my iPhone
> On Oct 5, 2024, at 7:39 AM, Jeff DePolo <jd0@broadsci.com> wrote:
>
>
>>
>> I never saw 7/8" Heliax or Cellflex with solid inner conductor.
>
> Several older 7/8" Heliax-type cables had solid center conductors, with
> Cablewave probably being the most common back in the 70's. I still have
> connectors for it if that's what it turns out to be. Rather than a thread-in
> or push-in center conductor contact as used with the tubular center conductor
> on modern 7/8 cables, it had a center conductor assembly that made contact
> with the outside of the center conductor. Cleaning the dielectric off the
> center conductor properly to prep for this type of connector wasn't fun.
> Unlike modern 7/8" cables, the shield and center conductor weren't cut off
> flush with each other, the center had to protrude by maybe 3/8" (it's been a
> while, don't quote me on that).
>
> There was also a lot of Prodelin 7/8" cable that floated around on the
> surplus market in the 1980's. It, too, had a solid center conductor. It
> had, by far, the toughest outer jacket of any Heliax-style cable I've ever
> had the displeasure of working with. It was bonded to the shield and tough
> as hell.
>
> To help identify what you have, a few more questions:
>
> 1. Is the outer conductor corrugation helical ("spiral") or annular
> ("rings")?
>
> 2. What is the measured OD of the outer conductor at the peaks?
>
> 3. What is the measured OD of the inner conductor?
>
> 4. Is the inner conductor solid copper or copper-clad aluminum?
>
> 5. Confirming - the outer conductor is copper, not aluminum,correct?
>
> --- Jeff WN3A
>
>
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