[Elecraft] BL-2 Balun Heating

[Steve Ellington]

Gary
I still don't understand why you don't use the balun in the tuner. That's 
what those big ceramic insulators on the back are for. Why are you messing 
with that little Elecraft balun?
Steve
N4LQ
N4LQ at carolina.rr.com
----- Original Message ----- 
From: "Gary Winkelman" <thewinks02 at gmail.com>
To: <elecraft at mailman.qth.net>
Sent: Friday, November 20, 2009 4:24 PM
Subject: Re: [Elecraft] BL-2 Balun Heating


> Thanks for all the advise!  I've been running  tests all day to which I
> have a nice Excel spreadsheet.  I've run the tests on 160 thru 10 meters
> using my trusty MFJ-259B (couldn't live without it).  I ran AT1KM - no
> balun, BL-2 1:1, BL-2 4:1 and a W2AU bead balun 1:1, all thru the
> AT1KM.  All SWR, R & X values jived.  I did not try running 125 watts
> thru the balun during the tests.  If it heated up, I'd have to let it
> cool to get an accurate reading the next frequency.  The test would take
> 2 weeks!
>
> Finally, I took the advise to put the balun between the tuner and the
> transmitter.  Tuned fine so I added power.  It stays cool as the
> proverbial cucumber!  One slight problem, the tuner is now RF hot. and
> there's RF getting into my computer.  If I reduce the power to 75 watts,
> the computer functions.  The transmitter is not bonded to the tuner.
> Because of my circumstances, I am not able to use an RF ground rod.  I
> have two  80 foot counterpoises that run next to our house on the ground.
>
> Thanks everybody for all your help!
>
> 73, Gary  N2UM
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