On 3/3/2020 7:30 AM, clive@gm3poi.com wrote:
Hi all,
I wonder whether anyone has used LDF4-50A for phasing lines and verified the
VF as being 88%. If not have you an idea of any spread on the VF.
This is a huge waste of money if your only concern is loss, which for
any coax is quite low on 160M.
I want to use some where it could make the difference to cable length.
However nothing will be assumed it will be measured. I note from the spec
that
they give a tolerance of 5% but I doubt some how that the VF varies that
much. 73 Clive GM3POI
Note that VF varies as a function of frequency. The published value is
at VHF, where it converges. At 2 MHz, it is 1-2% less than the published
value. This is an inherent characteristic of ALL transmission lines,
predicted by the wave equations.
73, Jim K9YC
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