Paul Plack wrote:
Actually, in theory, a fiberglas-enclosed colinear array fed from one
end requires more elements and length to equal the gain of an
otherwise comparable colinear array fed at each element. The upper
elements of a Stationmaster are seeing less RF current than the ones
closer
___
From: Repeater-Builder@ yahoogroups. com [mailto:Repeater-
[EMAIL PROTECTED] ups.com] On Behalf Of Nate Duehr
Sent: Friday, May 09, 2008 12:26 PM
To: Repeater-Builder@ yahoogroups. com
Subject: Re: [Repeater-Builder] Re: antenna question - Dip
At 5/10/2008 04:36, you wrote:
Paul,
This length always leads me to telling Hams that the 17 ft Comet does not
have the 8+ dbd gain the package says.
I don't recall the package saying dBd, but their website clearly indicates
8.5 dBi @ 146 MHz.
BTW, I measured the gain of the GP9 @ 440 MHz
: Friday, May 09, 2008 10:14 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Re: antenna question - Dip It and Scotch Kote
and Kry
--- In HYPERLINK
mailto:Repeater-Builder%40yahoogroups.com[EMAIL PROTECTED]
m, Paul Finch [EMAIL PROTECTED]
wrote:
Do a Google search for yourself
@yahoogroups.com
Subject: RE: [Repeater-Builder] Re: antenna question - Dip It and Scotch
Kote and Kry
Dang, must have misread something. Was in a hurry, link below
Paul
HYPERLINK
http://www.ke3ht.org/14691/specsheet_220-2n.pdfhttp://www.ke3ht.-org/14691
/-specsheet_-220-2n.pdf
--- On Fri, 5/9/08, Laryn Lohman [EMAIL PROTECTED] wrote:
From: Laryn Lohman [EMAIL PROTECTED]
Subject: [Repeater-Builder] Re: antenna question - Dip It and Scotch Kote and
Kry
To: Repeater-Builder@yahoogroups.com
Date: Friday, May 9, 2008, 12:09 AM
--- In Repeater-Builder
-Builder@yahoogroups.com
Subject: RE: Re: [Repeater-Builder] Re: antenna question - Dip It and Scotch
Kote and Kry
Ron,
Remember that lightning not only hits the top of the tower but can come back
off the tower and hit something else in it's way, I think I heard in around
150 foot increments
Paul Finch wrote:
Actually I looked up the Super Stationmaster and and they have one
that's rated at 9 DB at VHF.
dBi or dBd? Very important. DB is a useless number without that
third letter when rating antennas. (GRIN)
I'd say generally that what you're describing is not physically
/09 Fri PM 12:26:26 CDT
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: antenna question - Dip It and Scotch Kote
and Kry
Paul Finch wrote:
Actually I looked up the Super Stationmaster and and they have one
that's rated at 9 DB at VHF.
dBi or dBd
@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: antenna question - Dip It and Scotch
Kote and Kry
Paul Finch wrote:
Actually I looked up the Super Stationmaster and and they have one
that's rated at 9 DB at VHF.
dBi or dBd? Very important. DB is a useless number without that
third letter
On May 9, 2008, at 9:13 PM, Laryn Lohman wrote:
--- In Repeater-Builder@yahoogroups.com, Paul Finch [EMAIL PROTECTED]
wrote:
Do a Google search for yourself, it's the first result that comes
up. The
DB-228 is the same way, it about 44 feet long overall.
Paul Finch wrote:
Actually I
@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: antenna question - Dip It and Scotch Kote
and Kry
Ron and gang:
As Dick W7TIO noted, the antenna should be selected based on the desired
coverage range of
the rptr. While StationMaster (SM) and similar antennas are at DC ground
be preferred.
Thanks for you input.
73, ron, n9ee/r
From: MCH [EMAIL PROTECTED]
Date: 2008/05/07 Wed PM 02:12:33 CDT
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: antenna question - Dip It and Scotch Kote
and Kry
I haven't had as many problems
ocwarren2000 wrote:
Er.. uh... Excuse me, but why all this commotion about painting
and preserving antennas???
If everyone used limited range, low gain, stacked folded dipoles,
then maybe so, but stacked folded dipoles are a low gain limited
range item.
A 4-bay stacked dipole
To: Repeater-Builder@yahoogroups.com
Sent: Thursday, May 08, 2008 1:53 PM
Subject: Re: [Repeater-Builder] Re: antenna question - Dip It and Scotch Kote
and Kry
ocwarren2000 wrote:
Er.. uh... Excuse me, but why all this commotion about painting
and preserving antennas
.
Paul
_
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Ron Wright
Sent: Thursday, May 08, 2008 7:03 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: Re: [Repeater-Builder] Re: antenna question - Dip It and Scotch
Kote and Kry
Joe,
I agree
: [Repeater-Builder] Re: antenna question - Dip It and Scotch
Kote and Kry
ocwarren2000 wrote:
Er.. uh... Excuse me, but why all this commotion about painting
and preserving antennas???
If everyone used limited range, low gain, stacked folded dipoles,
then maybe so, but stacked folded dipoles
Dick,
This discussion of weather proofing an antenna was started in part because I am
replacing a 4 bay DB224 up high and near the Gulf of Mexico. We think the salt
air got to it. We have had similar problems in the past. The antenna has been
up for about 12 years.
I was looking for a
I haven't had as many problems with lightning and the fiberglass
antennas as I have with wind causing fractures in the connections
between the elements. In the case of the coasts, you have to deal with
that AND salt, so I doubt there is any good solution.
The above said, I do believe the 224
frequency.
Hope this helps.
Dick W1NMZ
Manager (Retired)
Electromagnetic Engineering and Test
Lockheed Skunk Works
- Original Message -
From: Ron Wright
To: Repeater-Builder@yahoogroups.com
Sent: 07 May, 2008 11:10
Subject: Re: [Repeater-Builder] Re: antenna question - Dip It and Scotch
This painting of antennas seems to be on many of our minds.
Wonder what the antenna manufactures would recommend or what they use if any???
After you get beyond the sales person who swears their products are rock solid
and don't need painting or additional protection then you might get someone
21 matches
Mail list logo
