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Today's Topics:
1. "New beverage" (Ron Spencer)
2. Re: "New beverage" (Joe Subich, W4TV)
3. Re: "New beverage" (Tom W8JI)
4. Re: "New beverage" (Herb Schoenbohm)
5. Re: "New beverage" (John Kaufmann)
6. Re: "New beverage" (Tom W8JI)
7. Re: "New beverage" (PA5MW, Mark)
8. New Filtering Technique (N7DF)
9. RFI ferrites (dospicos@q.com)
10. Re: RFI ferrites (Andy Blank)
11. Re: RFI ferrites (Shoppa, Tim)
12. Re: RFI ferrites (N1BUG)
13. Re: RFI ferrites (Richard Zalewski)
14. Re: RFI ferrites (Charlie Cunningham)
----------------------------------------------------------------------
Message: 1
Date: Thu, 16 May 2013 10:19:30 -0700
From: Ron Spencer <ron.e.spencer@gmail.com>
To: topband@contesting.com
Subject: Topband: "New beverage"
Message-ID: <51951522.5010008@gmail.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
After looking at their literature it appears to me that this is nothing
more then two beverages, one in each direction, with the "feed unit"
being, perhaps, a couple relays. I don't see the merit in using RG6 as
the beverage wire: its heavy, will need more supports, and compared to
other solutions, perhaps more expensive. And the fact that the feed unit
can be placed anywhere along the antenna? I must be missing something
clever because all that would seem to do is make one direction's wire
longer and the other shorter?
Ron
N4XD
------------------------------
Message: 2
Date: Thu, 16 May 2013 13:38:42 -0400
From: "Joe Subich, W4TV" <lists@subich.com>
To: topband@contesting.com
Subject: Re: Topband: "New beverage"
Message-ID: <519519A2.5090408@subich.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Electronically both directions are "full length" ... I suspect the
design is similar to the one shown about half way down the page here:
http://kw2p.blogspot.com/2010/08/kw2p-beverage-antenna-designs.html
73,
... Joe, W4TV
On 5/16/2013 1:19 PM, Ron Spencer wrote:
After looking at their literature it appears to me that this is nothing
more then two beverages, one in each direction, with the "feed unit"
being, perhaps, a couple relays. I don't see the merit in using RG6 as
the beverage wire: its heavy, will need more supports, and compared to
other solutions, perhaps more expensive. And the fact that the feed unit
can be placed anywhere along the antenna? I must be missing something
clever because all that would seem to do is make one direction's wire
longer and the other shorter?
Ron
N4XD
All good topband ops know how to put up a beverage at night.
_________________
Topband Reflector
------------------------------
Message: 3
Date: Thu, 16 May 2013 13:57:50 -0400
From: "Tom W8JI" <w8ji@w8ji.com>
To: <topband@contesting.com>
Subject: Re: Topband: "New beverage"
Message-ID: <EAA7165BB8B747D7837397A7A8492CA7@tom0c1d32a93f0>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=response
After looking at their literature it appears to me that this is nothing
more then two beverages, one in each direction, with the "feed unit"
being, perhaps, a couple relays. I don't see the merit in using RG6 as
the beverage wire: its heavy, will need more supports, and compared to
other solutions, perhaps more expensive. And the fact that the feed unit
can be placed anywhere along the antenna? I must be missing something
clever because all that would seem to do is make one direction's wire
longer and the other shorter?
Since the antenna is a transmission line, with suitable end and center
transformers, the feedpoint can be placed anywhere and the full length
used.
With different transformers, any reasonable type of transmission line can
be
used.
------------------------------
Message: 4
Date: Fri, 17 May 2013 14:44:29 -0400
From: Herb Schoenbohm <herbs@vitelcom.net>
To: topband@contesting.com
Subject: Re: Topband: "New beverage"
Message-ID: <51967A8D.4040309@vitelcom.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Good quality flooded RG-6 laying on the ground (BOG) might be an easy
install like before contests at some locations. However I have no idea
on how this would perform compared to an elevated version. If the
directivety is maintained and the S/N ratio is still usable then such a
concept would be worth considering. Such an installation might also be
considered for DX-peditions where supports for a normal Beverage are
just not available. Even for a short term use a normal consumer grade
1000 foot roll of RG-6 is competitive with the same amount of #12 or 14
THNN and certainly more competitive than 1000' of higher grade ladder
line. It is nice however having a vendor who offers a unique of the
shelf solution and it would nice to get some feedback on A/B checks with
the conventional Beverage.
Herb, KV4FZ
On 5/16/2013 1:57 PM, Tom W8JI wrote:
After looking at their literature it appears to me that this is
nothing more then two beverages, one in each direction, with the
"feed unit" being, perhaps, a couple relays. I don't see the merit
in using RG6 as the beverage wire: its heavy, will need more
supports, and compared to other solutions, perhaps more expensive.
And the fact that the feed unit can be placed anywhere along the
antenna? I must be missing something clever because all that would
seem to do is make one direction's wire longer and the other shorter?
Since the antenna is a transmission line, with suitable end and center
transformers, the feedpoint can be placed anywhere and the full length
used.
With different transformers, any reasonable type of transmission line
can be used.
All good topband ops know how to put up a beverage at night.
_________________
Topband Reflector
------------------------------
Message: 5
Date: Thu, 16 May 2013 20:37:32 -0400
From: "John Kaufmann" <john.kaufmann@verizon.net>
To: <topband@contesting.com>
Subject: Re: Topband: "New beverage"
Message-ID: <004601ce5296$b97b9860$2c72c920$@kaufmann@verizon.net>
Content-Type: text/plain; charset="US-ASCII"
Go to http://exax.net/index.html and scroll down the page to "center fed
steerable wave antenna". The diagram shows how you can feed a 2-wire
Beverage in the center, or anywhere along its length. The two
transformers
in the middle have center taps that pass signal currents from one side of
the antenna to the other side. Therefore the entire length of the
Beverage
is active at all times. I built one of these systems many years ago and
it
worked very well.
The reflection transformers at the end function exactly the same as the
reflection transformers in a conventional 2-wire Beverage, and convert
common mode currents to transmission line currents that are sent back to
the
center of the antenna. The secondary windings of the two transformers in
the center pick off the transmission line currents and provide receiver
feeds for two directions. Functionally it is the same as a conventional
2-wire Beverage of the same overall length, except it gives you the
convenience of feeding it anywhere.
73, John W1FV
------------------------------
Message: 6
Date: Thu, 16 May 2013 22:19:33 -0400
From: "Tom W8JI" <w8ji@w8ji.com>
To: <topband@contesting.com>
Subject: Re: Topband: "New beverage"
Message-ID: <DF563A423B7A4741AACDA14F5DF40542@tom0c1d32a93f0>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Go to http://exax.net/index.html and scroll down the page to "center fed
steerable wave antenna". The diagram shows how you can feed a 2-wire
Beverage in the center, or anywhere along its length. The two
transformers
in the middle have center taps that pass signal currents from one side of
the antenna to the other side. Therefore the entire length of the
Beverage
is active at all times.
Except with coax, you would not connect across the center tap point. There
would be a direct connection across the shields, since the center has no
common mode (antenna mode) currents at all.
With a true balanced line, the common mode (antenna mode) connection is
across a center tap.
------------------------------
Message: 7
Date: Fri, 17 May 2013 09:10:28 +0200
From: "PA5MW, Mark" <pa5mw@home.nl>
To: topband@contesting.com
Subject: Re: Topband: "New beverage"
Message-ID: <5195D7E4.2030400@home.nl>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
I find the center/off-center feedpoint very attractive for those of us
cramped in between on a city lot.
You can hide a BOG-like coax along the neighbors property lines for 200
to 500 ft in two directions, whatever suits you.
The termination adjustment is done at your shack. Much preferred over
doing it on any open/public property, in the dark etc..
What I'm missing is detailed info on the installed height of this
reversible beverage and the involved effects at typical BOG heights from
0 to 1/3 foot or so.
73 Mark, PA5MW
On 17-5-2013 20:44, Herb Schoenbohm wrote:
Good quality flooded RG-6 laying on the ground (BOG) might be an easy
install like before contests at some locations. However I have no
idea on how this would perform compared to an elevated version. If the
directivety is maintained and the S/N ratio is still usable then such
a concept would be worth considering. Such an installation might also
be considered for DX-peditions where supports for a normal Beverage
are just not available. Even for a short term use a normal consumer
grade 1000 foot roll of RG-6 is competitive with the same amount of
#12 or 14 THNN and certainly more competitive than 1000' of higher
grade ladder line. It is nice however having a vendor who offers a
unique of the shelf solution and it would nice to get some feedback on
A/B checks with the conventional Beverage.
Herb, KV4FZ
On 5/16/2013 1:57 PM, Tom W8JI wrote:
After looking at their literature it appears to me that this is
nothing more then two beverages, one in each direction, with the
"feed unit" being, perhaps, a couple relays. I don't see the merit
in using RG6 as the beverage wire: its heavy, will need more
supports, and compared to other solutions, perhaps more expensive.
And the fact that the feed unit can be placed anywhere along the
antenna? I must be missing something clever because all that would
seem to do is make one direction's wire longer and the other shorter?
Since the antenna is a transmission line, with suitable end and
center transformers, the feedpoint can be placed anywhere and the
full length used.
With different transformers, any reasonable type of transmission line
can be used.
All good topband ops know how to put up a beverage at night.
_________________
Topband Reflector
All good topband ops know how to put up a beverage at night.
_________________
Topband Reflector
------------------------------
Message: 8
Date: Fri, 17 May 2013 06:53:09 -0700 (PDT)
From: N7DF <n7df@yahoo.com>
To: "topband@contesting.com" <topband@contesting.com>
Subject: Topband: New Filtering Technique
Message-ID:
<1368798789.2486.YahooMailNeo@web162803.mail.bf1.yahoo.com>
Content-Type: text/plain; charset=iso-8859-1
Is there a possibility that this filtering methodology?could be applied to
topband systems?
?
http://www.spacewar.com/reports/Making_frequency_hopping_radios_practical_999.html
------------------------------
Message: 9
Date: Fri, 17 May 2013 11:06:00 -0400 (EDT)
From: dospicos@q.com
To: topband@contesting.com
Subject: Topband: RFI ferrites
Message-ID:
<46649667.829544.1368803160688.JavaMail.root@md20.quartz.synacor.com>
Content-Type: text/plain; charset=utf-8
HI All:
I am looking for a source(s ) for mix 31 ferrites. Especially in the
larger sizes, like the FT 240. I have tried the usual suspects . Amidon,
Digikey, Mouser, Lodestar Pacific, to no avail.
Any leads will be appreciated, either on or off the list.
73 to all
Dean? W5PJR
Tijeras, NM
------------------------------
Message: 10
Date: Fri, 17 May 2013 11:21:08 -0400
From: Andy Blank <andyn2nt@gmail.com>
To: dospicos@q.com
Cc: topband@contesting.com
Subject: Re: Topband: RFI ferrites
Message-ID:
<CAP+eefKy3T=55q_4aU8nAVAk41cGMKjwA+wyBy1ri-X3s+=scg@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
Dean here is a great source for stuff like that.
Cheap too.
http://www.kitsandparts.com/toroids.php
73, Andy N2NT
On Fri, May 17, 2013 at 11:06 AM, <dospicos@q.com> wrote:
HI All:
I am looking for a source(s ) for mix 31 ferrites. Especially in the
larger sizes, like the FT 240. I have tried the usual suspects . Amidon,
Digikey, Mouser, Lodestar Pacific, to no avail.
Any leads will be appreciated, either on or off the list.
73 to all
Dean W5PJR
Tijeras, NM
All good topband ops know how to put up a beverage at night.
_________________
Topband Reflector
------------------------------
Message: 11
Date: Fri, 17 May 2013 15:24:31 +0000
From: "Shoppa, Tim" <tshoppa@wmata.com>
To: "'dospicos@q.com'" <dospicos@q.com>, "'topband@contesting.com'"
<topband@contesting.com>
Subject: Re: Topband: RFI ferrites
Message-ID:
<303A17BD5F8FA34DA45EEC245271AC0B7438FA8C@JGEX2K10MBX2.wmata.local>
Content-Type: text/plain; charset="iso-8859-1"
Fair-Rite 2631803802 is the Amidon FT-240-31. Available at Mouser, Newark,
Arrow, and other places.
I have a personal cross-ref between some Amidon and Fair-rite numbers. Not
sure if I'd get in trouble for publishing it.
I like to use a white paint marker to put numbers on big cores as I unpack
them :-)
Tim N3QE
----- Original Message -----
From: dospicos@q.com [mailto:dospicos@q.com]
Sent: Friday, May 17, 2013 11:06 AM
To: topband@contesting.com <topband@contesting.com>
Subject: Topband: RFI ferrites
HI All:
I am looking for a source(s ) for mix 31 ferrites. Especially in the
larger sizes, like the FT 240. I have tried the usual suspects . Amidon,
Digikey, Mouser, Lodestar Pacific, to no avail.
Any leads will be appreciated, either on or off the list.
73 to all
Dean? W5PJR
Tijeras, NM
All good topband ops know how to put up a beverage at night.
_________________
Topband Reflector
------------------------------
Message: 12
Date: Fri, 17 May 2013 11:30:03 -0400
From: N1BUG <paul@n1bug.com>
To: dospicos@q.com
Cc: topband@contesting.com
Subject: Re: Topband: RFI ferrites
Message-ID: <51964CFB.1020807@n1bug.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
Hi Dean,
Did you search for the right part number? Mouser indicates 748 of
the 2.4" 31 mix toroids in stock at $6.94 each. That is where I get
mine from. The Fair-Rite part number is 2631803802.
73,
Paul N1BUG
------------------------------
Message: 13
Date: Fri, 17 May 2013 08:30:37 -0700
From: Richard Zalewski <dick.w7zr@gmail.com>
To: Andy Blank <andyn2nt@gmail.com>
Cc: dospicos@q.com, topband@contesting.com
Subject: Re: Topband: RFI ferrites
Message-ID:
<CACVQm3m0y7Qt2TLbpP0sV-M=2G+Cg850j3ncwjG2qm0tNwN0qQ@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
I have 4 large ones that are brand new that I never used. 1 3/8 ID 2 3/8
od 7/16 thick. Got these from Amidon.
On Fri, May 17, 2013 at 8:21 AM, Andy Blank <andyn2nt@gmail.com> wrote:
Dean here is a great source for stuff like that.
Cheap too.
http://www.kitsandparts.com/toroids.php
73, Andy N2NT
On Fri, May 17, 2013 at 11:06 AM, <dospicos@q.com> wrote:
>
>
>
>
> HI All:
>
>
>
> I am looking for a source(s ) for mix 31 ferrites. Especially in the
> larger sizes, like the FT 240. I have tried the usual suspects .
> Amidon,
> Digikey, Mouser, Lodestar Pacific, to no avail.
>
>
>
> Any leads will be appreciated, either on or off the list.
>
>
>
> 73 to all
>
>
>
> Dean W5PJR
>
> Tijeras, NM
> All good topband ops know how to put up a beverage at night.
> _________________
> Topband Reflector
All good topband ops know how to put up a beverage at night.
_________________
Topband Reflector
--
Tnx es 73
Richard W7ZR
www.w7zr.com
*Be joyful in hope, patient in affliction, faithful in prayer*
------------------------------
Message: 14
Date: Fri, 17 May 2013 11:41:57 -0400
From: "Charlie Cunningham" <charlie-cunningham@nc.rr.com>
To: <dospicos@q.com>, <topband@contesting.com>
Cc: lynne.frye@kregercomponents.com
Subject: Re: Topband: RFI ferrites
Message-ID: <004201ce5315$13a0ffa0$3ae2fee0$@nc.rr.com>
Content-Type: text/plain; charset="utf-8"
Contact Lynne Frye at Kreger Components, Inc. Salem, VA.
lynne.frye@kregercomponents.com
They are a national distributor for Fair-Rite Products: I have used a LOT
of their products over the years in my work, and a few (from the Designer
Kits) in my ham radio balun, binocular transformers, baluns and RFI
suppression work! Excellent supplier and excellent products!! I'll be
really surprised if you can't find exactly what you need!! They DO have
larger sizes that work with RG-213 etc.. You can tell Lynne that I sent
you! (Don't have her phone number handy at the moment)
See also their website, catalog and product line at
www.kregercomponents.com. Lynne can also point you to other distributors
for Fair-Rite products. Feel sure that you won't be disappointed!
Good luck and best regards!
Charlie Cunningham, K4OTV
Charles Cunningham, Jr. PE
-----Original Message-----
From: Topband [mailto:topband-bounces@contesting.com] On Behalf Of
dospicos@q.com
Sent: Friday, May 17, 2013 11:06 AM
To: topband@contesting.com
Subject: Topband: RFI ferrites
HI All:
I am looking for a source(s ) for mix 31 ferrites. Especially in the
larger sizes, like the FT 240. I have tried the usual suspects . Amidon,
Digikey, Mouser, Lodestar Pacific, to no avail.
Any leads will be appreciated, either on or off the list.
73 to all
Dean W5PJR
Tijeras, NM
All good topband ops know how to put up a beverage at night.
_________________
Topband Reflector
------------------------------
Subject: Digest Footer
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Topband mailing list
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http://lists.contesting.com/mailman/listinfo/topband
------------------------------
End of Topband Digest, Vol 125, Issue 17
****************************************
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