[Elecraft] Balun Questions

[Guy Olinger K2AV]

Hi Bob, et al,

Thank you all for your careful attention.

I read it wrong, as several have pointed out overnight. I transposed that
to a percentage in my memory after reading it. One of the reasons for
referring people to the original material in these cases. Someone will get
it right.

That makes it two and a half hairs :>)  Doesn't appear to change the
argument. To me anyway the method is still a crude measurement instead of
watching a wide frequency scan while bending the cable along with other
performance specific measurements.

I still would not use the solid center conductor versions (RG142/303) on a
winding.

73, Guy K2AV

On Tuesday, February 9, 2016, Robert Nobis <n7rjn at nobis.net> wrote:

> Hi Guy,
>
> I am not sure how you arrived at the “2/1000 of an inch” figure from the
> ANSI spec? The spec actually says “A change in ovality from a given
> sample’s initial measured value of 0.010 inches or more (> 0.010)
> represents the point of non-acceptable bending performance.”
>
>
> 73,
>
>
> Bob Nobis - N7RJN
> n7rjn at nobis.net <javascript:_e(%7B%7D,'cvml','n7rjn at nobis.net');>
>
>
> On Feb 8, 2016, at 18:01, Guy Olinger K2AV <k2av.guy at gmail.com
> <javascript:_e(%7B%7D,'cvml','k2av.guy at gmail.com');>> wrote:
>
>
> I also suggest that everyone carefully study the ANSI standard until it is
> clear what they are doing mechanically and see what they are actually
> measuring:
>
> http://www.scte.org/documents/pdf/standards/ANSI_SCTE%2039%202007.pdf
>
> The method of measuring is in section 4. They are looking for a limit of
> 1% surface deformity when bending.
>
> In the case of RG400 with .195 inch OD, that would be 2/1000 of an inch
> (yes, that's three zeros, two one thousandths of an inch) bending deformity
> at the surface of the teflon jacket, or half the thickness of an average
> human hair.
>
>
>
>
>
>

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