We had the same experience with the 4:1 baluns on the KT34XA and 40M4 at
W6UE. Something on order of twenty years of service with no problems
(with the baluns anyway- 40M4 is another story). I should note that I am
not sure how much full power RTTY that included (mostly SSB/CW I
suspect). In any case, as a 4:1 impedance transformer, the KLM balun
worked fine for us and seems reliable. My only concern with that balun
is how effective it is at preventing feedline radiation compare to a
conventional choke balun. Of course there is no reason why you couldn't
put a know good 1:1 choke balun (like one of the K9YC designs) in series
between the KLM 4:1 balun and the coax.
73, Mike W4EF.................
On 4/28/2014 7:34 AM, k3mm@verizon.net wrote:
I've never had a tubular KLM 4:1 balun from my KT34xa's go bad and mine are
20+ years old. Obviously not an unreliable implementation, although the plated
mounting clip used to rust out! Dont know what the M2 version looks like...
I'm not a big fan of the packaging of those I see on the balundesign website.
Since the design is significantly different, I'd be curious if it changed the
tuning/match on a KT34/6 and how best to mount the box on the boom.
Ty K3MM
On 04/28/14, caraj@cox.net wrote:
Jim:
I use 6 baluns in my antennas. Most have been changed over from white
platsic pipe contained baluns(which often go bad in 1 year) to Balun Design
produced
- http://www.balundesigns.com - models. They've worked fine for 18 months.
They are all current baluns. Can't remember the rationale . Asked this question
a
long, long time ago. Call and talk to Balun design he is very helpful. You
probably want
his model #4125 which is a 4:1 5kw.
73,
John K2SFS
---- Marsh Stewart <marsh@ka5m.net> wrote:
=============
I'm rebuilding a KT34XA and installing the KT36 upgrade kit plus new style
boom to element clamps. Right now I plan to use the new 3KW balun I got from
M2. Is there something better out there I should consider? I believe Balun
Designs makes excellent high quality products that work.
Marsh, KA5M
Jim:
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of Jim
W7RY
Sent: Saturday, April 26, 2014 11:00 PM
To: Jim W7RY; towertalk@contesting.com
Subject: Re: [TowerTalk] KT36 Balun
The KT-36 is 200 ohms feed point impedance. Not 50 ohms. I though I better
clarify.
73
Jim W7RY
-----Original Message-----
From: Jim W7RY
Sent: Saturday, April 26, 2014 7:43 PM
To: towertalk@contesting.com
Subject: [TowerTalk] KT36 Balun
Which balun do you recommend for the M2 KT36? A voltage balun or a current
balun? I run 1500 watts during RTTY contests.
I'm planning on winding my own. I have Jerry Sevick's book on building them.
Thanks!
73
Jim W7RY
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