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Re: Topband: Topband Digest, Vol 99, Issue 8

To: topband@contesting.com
Subject: Re: Topband: Topband Digest, Vol 99, Issue 8
From: K3vw@aol.com
Date: Mon, 7 Mar 2011 17:23:30 EST
List-post: <topband@contesting.com">mailto:topband@contesting.com>
Re: Using a BALUN on a "coax to unbalanced antenna", a UN-UN is preferred.  
K3VW
 
 
In a message dated 3/7/2011 3:01:17 P.M. Eastern Standard Time,  
topband-request@contesting.com writes:

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Today's Topics:

1. Re:  Preferred Choke Baluns (Tod - ID)
2. Re: Preferred Choke  Baluns (Milt --  N5IA)


----------------------------------------------------------------------

Message:  1
Date: Sun, 6 Mar 2011 14:15:18 -0700
From: "Tod - ID"  <tod@k0to.us>
Subject: Re: Topband: Preferred Choke Baluns
To:  "'Charles Moizeau'" <w2sh@msn.com>, "'Topband'"
<topband@contesting.com>
Message-ID:  <41FA0FDD41AD40CBA66A715067CFAC31@chem>
Content-Type:  text/plain;   charset="us-ascii"

Charles:

I make 160  meter RF Chokes [Choke Baluns] by running six turns of coax
through 5 cores  of Fair Rite type 31 [2.4 in diameter cores]. Five turns 
and
six cores will  also work.


Tod, K0TO



-----Original  Message-----
From: topband-bounces@contesting.com  
[mailto:topband-bounces@contesting.com]
On Behalf Of Charles  Moizeau
Sent: Friday, March 04, 2011 9:52 AM
To: Topband
Subject:  Topband: Preferred Choke Baluns


I'd be grateful to learn the  preferences of users of these devices.

My set-up is 50-Ohm, 0.405"  diameter (Wireman X-4XL) coaxial cable,
underground, but within electrical  pvc conduit.  This attaches through a
PL-259 to a DX Engineering  radial attachment plate.  The antenna is an
inverted L with its base  fed just through a variable capacitor (set for my
antenna at ~ 255 pF)  .

I have given thought to chopping the PL-259, stringing a bunch of  Palomar's
ferrite beads on the coax and then re-attaching the PL-259.   

However, an alternative would be to insert a manufactured or  home-brewed
balun, toroidal or solenoidal, between the radial attachment  plate's SO-239
connector and the variable capacitor.

Physical space  is not a problem because I've discovered that the DXE radial
attachment  plate will fit nicely into a 12" x  12" x  6" heavy-duty gray  
pvc
electrical box ($33 at Lowes).  I plan to revise the existing and  quite
messy above-ground set-up so that the radials will be inserted into  the box
through tight-fitting and caulked notched holes in the four top  edges, just
below where its cover will fasten, with their solder lugs  attached to the
plate 180 degrees opposite from the conventional  configuration.  In this 
way
the whole business can be buttoned up  tightly and buried, with just the
antenna's attachment point and the  capacitor's adjustment shaft sticking 
up.
Perhaps this plan will be  inspirational to others.

I'd prefer to see any choke balun  recommendations posted to this list 
rather
than sent directly, so as to  share the "wealth". 

Tnx es 73,

Charles, W2SH     

_______________________________________________
UR RST IS ... ... ..9  QSB QSB - hw? BK



------------------------------

Message:  2
Date: Sun, 6 Mar 2011 22:32:09 -0700
From: "Milt -- N5IA"  <n5ia@zia-connection.com>
Subject: Re: Topband: Preferred Choke  Baluns
To: "Tod - ID" <tod@k0to.us>, "'Charles Moizeau'"  <w2sh@msn.com>,
"'Topband'"  <topband@contesting.com>
Message-ID:  <CE2C51BE70F04EDC862862297B03E554@MiltVostro2010>
Content-Type:  text/plain; format=flowed; charset="iso-8859-1";
reply-type=original

And I make all of my choke baluns for 160 Meter  energy from 30 turns, 6" 
in 
diameter, of whatever cable it is.  This  is coaxial leads as well as rotor 
cables, etc.  Works like a  champ.

Milt, N5IA


-----Original Message----- 
From: Tod -  ID
Sent: Sunday, March 06, 2011 2:15 PM
To: 'Charles Moizeau' ;  'Topband'
Subject: Re: Topband: Preferred Choke  Baluns

Charles:

I make 160 meter RF Chokes [Choke Baluns] by  running six turns of coax
through 5 cores of Fair Rite type 31 [2.4 in  diameter cores]. Five turns 
and
six cores will also work.


Tod,  K0TO



-----Original Message-----
From:  topband-bounces@contesting.com 
[mailto:topband-bounces@contesting.com]
On  Behalf Of Charles Moizeau
Sent: Friday, March 04, 2011 9:52 AM
To:  Topband
Subject: Topband: Preferred Choke Baluns


I'd be grateful  to learn the preferences of users of these devices.

My set-up is  50-Ohm, 0.405" diameter (Wireman X-4XL) coaxial cable,
underground, but  within electrical pvc conduit.  This attaches through a
PL-259 to a DX  Engineering radial attachment plate.  The antenna is an
inverted L  with its base fed just through a variable capacitor (set for my
antenna at  ~ 255 pF) .

I have given thought to chopping the PL-259, stringing a  bunch of Palomar's
ferrite beads on the coax and then re-attaching the  PL-259.

However, an alternative would be to insert a manufactured or  home-brewed
balun, toroidal or solenoidal, between the radial attachment  plate's SO-239
connector and the variable capacitor.

Physical space  is not a problem because I've discovered that the DXE radial
attachment  plate will fit nicely into a 12" x  12" x  6" heavy-duty gray  
pvc
electrical box ($33 at Lowes).  I plan to revise the existing and  quite
messy above-ground set-up so that the radials will be inserted into  the box
through tight-fitting and caulked notched holes in the four top  edges, just
below where its cover will fasten, with their solder lugs  attached to the
plate 180 degrees opposite from the conventional  configuration.  In this 
way
the whole business can be buttoned up  tightly and buried, with just the
antenna's attachment point and the  capacitor's adjustment shaft sticking 
up.
Perhaps this plan will be  inspirational to others.

I'd prefer to see any choke balun  recommendations posted to this list 
rather
than sent directly, so as to  share the "wealth".

Tnx es 73,

Charles,  W2SH

_______________________________________________
UR RST IS ...  ... ..9 QSB QSB - hw?  BK

_______________________________________________
UR RST IS ... ...  ..9 QSB QSB - hw? BK


-----
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------------------------------

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End  of Topband Digest, Vol 99, Issue  8
**************************************

_______________________________________________
UR RST IS ... ... ..9 QSB QSB - hw? BK

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