[TowerTalk] Eliminating Balun on TH-11DX

Mon May 11 01:00:22 EDT 2015

Not "may", but WILL.  I've pulled out fender mounted mobile antennas using 
the standard 3/4" mount and angle bracket.  The volunteer fire guy specials.
The unsealed cable shield acts like a soda straw.  Even have seen water 
dripping out of the radio end of the cable when the plug is disconnected... 
scary.

Stan

-----Original Message----- 
From: Gene Smar
Sent: Sunday, May 10, 2015 4:49 PM
To: TexasRF at aol.com ; bobbrus1 at netscape.net
Cc: 'towertalk'
Subject: Re: [TowerTalk] Eliminating Balun on TH-11DX

Bob:

      If you do remove the balun and need to connect the coax directly to
the feed point, let me suggest this as a way of providing two good wire
leads off the end of the coax:
http://lists.contesting.com/archives//html/Towertalk/2007-02/msg00034.html .
If you use the coax braid as one connection exposed to the weather, it may
wick moisture into the rest of the shield, corroding the connection.  My
coax balun at the feed point to my Bencher Skyhawk has this connection at
the feed pont and I see nothing that causes me to want to re-do the
connection.

     FWIW.

73 de
Gene Smar  AD3F

-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of
TexasRF--- via TowerTalk
Sent: Sunday, May 10, 2015 10:45 AM
To: bobbrus1 at netscape.net; towertalk at contesting.com
Subject: Re: [TowerTalk] Eliminating Balun on TH-11DX

Bob, likely someone has done that but why would you want to?

If you do make the substitution, be aware that part of the tuning on the
TH11DX include the leads between the balun terminals and the antenna
terminals.  You would want to replicate that part of the antenna. Same gauge
insulation  covered wires, same spacing and same length.

It probably would suffice to strip the end of the coax back enough to equal
the length of the original wires and apply some liquid vinyl tape to keep
water  out of the coax.

Nothing is simple is it?

73,
Gerald K5GW

In a message dated 5/10/2015 8:21:58 A.M. Central Daylight Time,
bobbrus1 at netscape.net writes:

Has  anyone ever eliminated the Balun on the HY-Gain TH-11DX and just used
an RF  Choke made of windings of  coax?

Bob
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