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Re: [TowerTalk] Topband: Insulators for enclosure?

To: "Larry" <w6nws@arrl.net>, <towertalk@contesting.com>
Subject: Re: [TowerTalk] Topband: Insulators for enclosure?
From: "Wilson A. Caselli" <wcaselli@webkorner.com>
Reply-to: "Wilson A. Caselli" <wcaselli@webkorner.com>
Date: Fri, 2 Jan 2009 17:46:35 -0500
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
The correct name is "feed-through insulator", not stand-off insulator.

Look Here: 
http://www.dxengineering.com/Parts.asp?ID=1222&PLID=166&SecID=81&DeptID=32&PartNo=DXE%2DVFCC%2DH10%2DA

I have one of the above feedline current chokes mounted at the base of my 
Hy-Tower.  It is working great for me.

Many years ago companies like National Radio, J.W. Millen, & E.F. Johnson 
(and others) had these feed-through
insulators available (in various sizes) as catalog items.  To my 
recollection, Coors Technical Ceramics was most-likely
the source for most of these products.

May I suggest you download a product manual from MFJ on one of their KW 
antenna tuners, then look-up
the MFJ part number for the feed-through insulators used in it.  MFJ is very 
accommodating and quick
as long as you give them a MFJ part numbers.  MFJ also has a price list 
posted on line.
One possible MFJ feed-through insulator is # 606-1006 at $3.95 each, but I 
suspect it may be too
small for your application (you may need a longer creep distance for higher 
voltages).

Surplus Sales at: http://www.surplussales.com/Antennas/Antennas-6.html  has 
a (ICR) 9548 which would
likely do the job too.

Wilson Caselli, K1MIJ


----- Original Message ----- 
From: "Larry" <lknain@nc.rr.com>
To: <towertalk@contesting.com>
Sent: Thursday, January 01, 2009 6:59 AM
Subject: Re: [TowerTalk] Topband: Insulators for enclosure?


The white conical insulators are usually called standoff insulators. They
are usually used with balanced feed lines,

73, Larry  W6NWS
----- Original Message ----- 
From: "AD5VJ Bob" <rtnmi@sbcglobal.net>
To: <topband@contesting.com>
Sent: Thursday, January 01, 2009 1:52 AM
Subject: Topband: Insulators for enclosure?


>I was searching some links sent to me concerning the matching transformers
>and BALUNs UNUNs , ect that some had sent and appreciated
> them and am learning allot from them as I go along.
>
> Can anyone tell me what these small white insulators are called that are
> on the boxes of the transmit BALUNs on this page. I am
> talking about the two white ones that the wire connects to with the screws
> and nuts on the ends.
>
> They are about five pictures down from the top of the page.
>
> http://www.arraysolutions.com/Products/baluns.htm
>
>
>
>   73 fer nw es gud DX,
> QSL VIA: LotW, BUR, e-QSL
> Bob AD5VJ
> http://www.ad5vj.com/
> Old Calls WB5ZQU, WY5L/KH3, KE5CTY, N5IET
>
>
> _______________________________________________
> Topband mailing list
> Topband@contesting.com
> http://lists.contesting.com/mailman/listinfo/topband
>


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