All,
There is an antenna reflector that would be more appropriate for the
is post. Try it out.
Welcome to the anten...@mailman.qth.net mailing list! Antennas is a
mailing list (reflector) devoted to discussing, comparing,
evaluating,
designing, and constructing antennas (aerials) of all types,
I know this is OT but there are so many knowledgable people on this reflector
that I can't pass it up.
A friend has a Yagi antenna (HF tri-bander) that he wants to measure the SWR
before he raises the antenna up on the tower.
Question: is this accurate or does the proximity of ground (maybe two
, be careful, ladders are more dangerous than towers,
Have a great day,
--... ...--
Dale - WC7S in Wy
From: phys...@mac.com
Date: Fri, 12 Jul 2013 07:50:43 -0700
To: Elecraft@mailman.qth.net
Subject: [Elecraft] Off Topic -- Yagi Antenna SWR measurement ?
I know this is OT
On Fri, 12 Jul 2013 07:50:43 -0700, Phil Hystad wrote:
Question: is this accurate or does the proximity of ground (maybe two feet
high)
so strongly affect the SWR reading that the measurement is not accurate.
Not accurate at all. Most manufacturers say to stand the beam up so it
is pointed
To: elecraft
Subject: Re: [Elecraft] Off Topic -- Yagi Antenna SWR measurement ?
On Fri, 12 Jul 2013 07:50:43 -0700, Phil Hystad wrote:
Question: is this accurate or does the proximity of ground (maybe two
feet high)
so strongly affect the SWR reading that the measurement is not accurate
You might get a somewhat more representative SWR value if the yagi is
vertically mounted so that the reflector is closest to ground and the
director at the top.
The idea is that the reflector will partially decouple the close in
ground surface from the antenna. I've done this with VHF and
Thanks guys who answered the question -- good convergence. I had already
told my friend that his readings would not be very accurate but he is concerned
about putting an old beam antenna up that had been out of service and laying
out on the ground in the open for some time (years?).
I think I
To: mcduf...@garymcduffie.com; elecraft elecraft@mailman.qth.net
Sent: Friday, July 12, 2013 8:09 AM
Subject: Re: [Elecraft] Off Topic -- Yagi Antenna SWR measurement ?
What I have done is clamp it to my wooden deck railings on a 8 foot mast,
the higher your deck is the better.
That worked pretty
Sent: Friday, July 12, 2013 11:42 AM
To: WM3M; mcduf...@garymcduffie.com; elecraft
Subject: Re: [Elecraft] Off Topic -- Yagi Antenna SWR measurement ?
I used a 12 foot tall four leg scissor ladder. Close but no cigars. The
lower bands will probably show the higher SWR, and a lower shift in freq
On 7/12/2013 9:12 AM, John Santillo wrote:
What I do especially at the lower bands is put the antenna up in the air
around 10 to 12 feet and adjust it to just below the bottom of the band.
For example for 40M I would tune for best VSWR at 6.95MHz. Then when the
antenna was raised the resonant
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Mel Farrer
Sent: Friday, July 12, 2013 11:42 AM
To: WM3M; mcduf...@garymcduffie.com; elecraft
Subject: Re: [Elecraft] Off Topic -- Yagi Antenna SWR measurement ?
I used a 12 foot tall four leg scissor ladder. Close but no cigars. The
lower bands
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