On 11/1/2017 1:09 AM, Don W7WLL wrote:
Have any changes ever been suggested in the ham community that might
lead to improvement in structure or operation) If either of the
latter are available, I bet TH7 owners in general would be interested
in what what the modeling showed or what the suggested changes were.
Roger Cox then/formerly of HyGain posted some dimension changes many
years ago. I seem to no longer have that posting/e-mail - it was
similar to (but IIRC more extensive than) the "DX" settings (shown on
page 3-7) in the current MFJ/Hy-Gain manual.
73,
... Joe, W4TV
On 11/1/2017 1:09 AM, Don W7WLL wrote:
I asked Dan, AC6LA, offline if he had ever modeled the TH7DX, an antenna
I've been using since it was introduced (repaired a few times) and for
which I have a spare and a half. He said no but thought someone on
Towertalk might have and suggested asking.
Anyone every modeled this antenna? Have any changes ever been suggested
in the ham community that might lead to improvement in structure or
operation) If either of the latter are available, I bet TH7 owners in
general would be interested in what what the modeling showed or what the
suggested changes were.
A quick comparison I made from the old original HyGain manual that came
with mine many decades ago vs the new manual available at the HyGain/MFJ
site didn't reveal any differences, but I could have missed something.
Was told by a MFJ tech not long ago that the TH7 R 15 M traps (different
PN's from those in the DE's) are built to measure out 100 kHz higher (?)
than the 15 M DE's. Have not thought this through yet.
don W7WLL
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