It will depend on the yagi, but from experience the OWA design, with the
close spaced first director, can be tuned near the ground - pointing up in
the air as much as possible is always advised - with almost no change in SWR
and bandwidth.
73 Don
VE6JY
----- Original Message -----
From: <N5MT@aol.com>
To: <towertalk@contesting.com>
Sent: Monday, June 07, 2004 18:43
Subject: [TowerTalk] What are est of frequency chg for ten meters?
> Keith just made this comment and it sounds accurate. Ten feet is a bit
low
> for tuning. A 40 meter dipole tuned at 15-20 feet will resonate about
10-15
> KHz higher at 78 feet.
>
> Now lets change frequency to ten meters. A ten meter dipole antenna tuned
at
> 15 ft would resonate about ( What ) KHz higher at say 75-78 feet?
> Now lets change antenna to a 4 el yagi moving from/to same heights?
>
> Thanks. 73 Mike N5MT
> _______________________________________________
>
> See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|