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
--- In Repeater-Builder@yahoogroups.com, Paul Finch [EMAIL PROTECTED]
wrote:
By the way, I was admitting I made an error reading the gain. I think I
transposed the 9 MHz bandwidth with the gain, my error.
Paul
I appreciate the admission Paul. I always try to keep an open mind
though.
: [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. The only hit of lightning
--- 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
--- 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 looked up the Super Stationmaster and and they have
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
--- In Repeater-Builder@yahoogroups.com, Paul Finch [EMAIL PROTECTED]
wrote:
Actually I looked up the Super Stationmaster and and they have one
that's
rated at 9 DB at VHF.
Paul
Paul, could you please post a link to the above mentioned antenna?
It's tough searching; it seems there are
was enclosed except a link cornor reflector
or beam antenna!!!
Dick, W7TIO
From: Chuck Kelsey [EMAIL PROTECTED]
Date: 2008/05/04 Sun AM 08:52:31 CDT
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: antenna question - Dip It and
Scotch Kote and Krylon
Funny you should
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
. Faked me out at
first, too!
- Original Message -
From: Burt Lang
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, May 04, 2008 1:58 PM
Subject: Re: [Repeater-Builder] Re: antenna question - Dip It and
Scotch Kote
Fine except for one problem. Water is an excellant
Hello All
A couple of years ago I needed to camoflodge several new fiberglass antennas. I
investigated spray can paints at the local home store and came up with
Rustolum's specialty Paint For Plastic---that's what it says in headline form
on the can and it also says Direct--To--Plastic--Paint
So what color(s) did you use to camouflage them?
Joe M.
Scott Overstreet wrote:
Hello All
A couple of years ago I needed to camoflodge several new fiberglass
antennas. I investigated spray can paints at the local home store and
came up with Rustolum's specialty Paint For
Lite and dark green purposely splotchy.
- Original Message -
From: MCH
To: Repeater-Builder@yahoogroups.com
Sent: Monday, May 05, 2008 11:20 AM
Subject: Re: [Repeater-Builder] Re: antenna question - Dip It and Scotch Kote
So what color(s) did you use to camouflage
PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, May 04, 2008 12:19 AM
Subject: [Repeater-Builder] Re: antenna question - Dip It and Scotch Kote
Hi Robert,
You might get lucky... because they might also have advertised
the dip-it as an insulator material, which means someone
PROTECTED]
Date: 2008/05/04 Sun AM 06:53:49 CDT
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: antenna question - Dip It and Scotch Kote
Boy, you took a gamble. I'd have been afraid that this action could have
either messed up the VSWR or shifted the resonant
, 2008 8:09 AM
Subject: Re: Re: [Repeater-Builder] Re: antenna question - Dip It and Scotch
Kote
Coating, painting, etc of antenna elements has always been in question.
Some don't like using insulated wire for HF dipoles although think this
has long been resolved and is no problem. I am sure
-Builder@yahoogroups.com
Sent: Sunday, May 04, 2008 12:19 AM
Subject: [Repeater-Builder] Re: antenna question - Dip It and Scotch
Kote
Hi Robert,
You might get lucky... because they might also have advertised
the dip-it as an insulator material, which means someone was
hopefully looking
- Original Message -
From: skipp025 [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, May 04, 2008 9:44 AM
Subject: [Repeater-Builder] Re: antenna question - Dip It and Scotch Kote
I constructed a 6 meter beam some years back, worked like a bomb
even at 25ft above ground elevation
and folded dipoles. Go figure.
Chuck
WB2EDV
- Original Message -
From: skipp025 [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, May 04, 2008 9:44 AM
Subject: [Repeater-Builder] Re: antenna question - Dip It and Scotch Kote
I constructed a 6 meter beam some years
: [Repeater-Builder] Re: antenna question - Dip It and Scotch
Kote
I constructed a 6 meter beam some years back, worked like a bomb
even at 25ft above ground elevation. To ensure my pride and joy
would last a long time I sprayed it with clear Krylon brand spray
paint.
The antenna
recipe to get past the
moderator on repeater-builder
Ian
G8PWE
- Original Message -
From: skipp025
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, May 04, 2008 2:44 PM
Subject: [Repeater-Builder] Re: antenna question - Dip It and Scotch Kote
I constructed a 6 meter
Message -
From: skipp025
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, May 04, 2008 2:44 PM
Subject: [Repeater-Builder] Re: antenna question - Dip It and
Scotch Kote
I constructed a 6 meter beam some years back, worked like a bomb
even at 25ft above ground
04, 2008 12:19 AM
Subject: [Repeater-Builder] Re: antenna question - Dip It and Scotch Kote
Hi Robert,
You might get lucky... because they might also have advertised
the dip-it as an insulator material, which means someone was
hopefully looking at the dissipation factor (aka D-Factor
%40yahoogroups.comRepeater-Builder@yahoogroups.com
Sent: Sunday, May 04, 2008 9:44 AM
Subject: [Repeater-Builder] Re: antenna question - Dip It and Scotch Kote
I constructed a 6 meter beam some years back, worked like a bomb
even at 25ft above ground elevation. To ensure my pride and joy
would last a long time
At 5/4/2008 07:44, you wrote:
Paint a polythene cup with your favourite antenna covering. Let it dry and
put it into the microwave oven along with a cup of water (to act as a
dummy load)
Cook for 1 min on max power.
If it gets even slightly warm its no good for antennas.
er.. can I please
this problem, but I have never lived in cities
like Chicago or NY. Do live in Tampa, FL, hi.
73, ron, n9ee/r
From: skipp025 [EMAIL PROTECTED]
Date: 2008/05/04 Sun AM 09:25:20 CDT
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Re: antenna question - Dip It and Scotch Kote
antennas - beams and folded dipoles. Go figure.
Chuck
WB2EDV
- Original Message -
From: skipp025 [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, May 04, 2008 9:44 AM
Subject: [Repeater-Builder] Re: antenna question - Dip It and Scotch Kote
I constructed a 6 meter beam
]
Date: 2008/05/04 Sun PM 02:30:13 CDT
To: Repeater-Builder@yahoogroups.com
Subject: Re: Re: [Repeater-Builder] Re: antenna question - Dip It and Scotch
Kote and Kry
This painting of antennas seems to be on many of our minds.
Wonder what the antenna manufactures would recommend
:[EMAIL PROTECTED]
*To:* Repeater-Builder@yahoogroups.com
mailto:Repeater-Builder@yahoogroups.com
*Sent:* Sunday, May 04, 2008 2:44 PM
*Subject:* [Repeater-Builder] Re: antenna question - Dip It and
Scotch Kote
I constructed a 6 meter beam some years back, worked like
@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: antenna question - Dip It and Scotch
Kote
Paint a polythene cup with your favourite antenna covering. Let it dry and
put it into the microwave oven along with a cup of water (to act as a dummy
load)
Cook for 1 min on max power.
If it gets even slightly
-builder
Ian
G8PWE
- Original Message -
From: skipp025
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, May 04, 2008 2:44 PM
Subject: [Repeater-Builder] Re: antenna question - Dip It and
Scotch Kote
I constructed a 6 meter beam some years back, worked like
@yahoogroups.com
*Sent:* Sunday, May 04, 2008 2:44 PM
*Subject:* [Repeater-Builder] Re: antenna question - Dip It and
Scotch Kote
I constructed a 6 meter beam some years back, worked like a bomb
even at 25ft above ground elevation. To ensure my pride and joy
would last a long time
:[EMAIL PROTECTED]
*To:* Repeater-Builder@yahoogroups.com
mailto:Repeater-Builder@yahoogroups.com
*Sent:* Sunday, May 04, 2008 2:44 PM
*Subject:* [Repeater-Builder] Re: antenna question - Dip It and
Scotch Kote
I constructed a 6 meter beam some years back, worked like
hi all,
I've been looking at the Telewave ANT150F6-2, 144-151 MHz fiberglass collinear
antenna for Ham repeater at 1175 ft above ground. I think Telewave's version
of the Super Station Master. Spec sheet at
http://www.telewave.com/pdf/TWDS-7020.pdf
The spec says it is 6 db gain and it is
Subject: Re: [Repeater-Builder] Re: antenna question - Dip It and Scotch Kote
Think about it. If you expect the water to act as a heatsink, it would
require the cup to transfer heat thru its material. Heat can go both
ways and you will never know if heat generated on the outside
mailto:Repeater-Builder@yahoogroups.com
*Sent:* Sunday, May 04, 2008 2:44 PM
*Subject:* [Repeater-Builder] Re: antenna question - Dip It and
Scotch Kote
I constructed a 6 meter beam some years back, worked like a bomb
even at 25ft above ground elevation. To ensure my
-
From: [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, May 04, 2008 10:29 AM
Subject: Re: [Repeater-Builder] Re: antenna question - Dip It and Scotch Kote
The problem with high loss tangent is that you'd never see it as reflected
power. You could lose 3 dB
Uh...Burt, I think he meant water in a separate cup. Faked me out at first, too!
- Original Message -
From: Burt Lang
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, May 04, 2008 1:58 PM
Subject: Re: [Repeater-Builder] Re: antenna question - Dip It and Scotch Kote
Fine
Cook for 1 min on max power.
If it gets even slightly warm its no good for
antennas.
Hi all. Here in Yakima Washington, I have supplied
Hams with pcs. of corean (counter top material) to
use as an insulator in their antenna projects. We have
done the same test in the microwave. It stays cool
At 5/4/2008 12:58, you wrote:
Fine except for one problem. Water is an excellant absorber of the
microwaves used in the microwave ovens (2.45 GHz) So your water will
heat up quickly irregardless of the coating.
Yes, but the idea is that the cup of water (load to keep the magnetron
happy) is
Subject: [Repeater-Builder] Re: antenna question - Dip It and Scotch Kote
I constructed a 6 meter beam some years back, worked like a bomb
even at 25ft above ground elevation. To ensure my pride and joy
would last a long time I sprayed it with clear Krylon brand spray
paint.
The antenna
@yahoogroups.com
*Sent:* Sunday, May 04, 2008 2:44 PM
*Subject:* [Repeater-Builder] Re: antenna question - Dip It and
Scotch Kote
I constructed a 6 meter beam some years back, worked like a bomb
even at 25ft above ground elevation. To ensure my pride and joy
would last a long time I
Hi Robert,
You might get lucky... because they might also have advertised
the dip-it as an insulator material, which means someone was
hopefully looking at the dissipation factor (aka D-Factor) when
the compound was engineered. Time will tell...
cheers,
skipp
georgiaskywarn [EMAIL
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