[TenTec] 229B tuner: Slight upward creep of SWR

[Bob McGraw K4TAX]

Your balun is OK.  The ceramic disk capacitors are heating and changing value.  Usually they will return to near the original value when they cool.  As to damage, at some temp they will go "bang".  As long as you are satisfied with the performance you should be OK.  

Bob, K4TAX


Sent from my iPhone

> On Jul 23, 2018, at 1:09 AM, Peter Klein <boulanger.croissant at gmail.com> wrote:
> 
> Thanks for all the good info. One thing though. The SWR creep may be a “clear indication“ that I am using the wrong balun, but that ain’t the case. I am using a 1:1 Guanella balun, 17 turns RG-58 on whatever torroid Rick, DJ0IP recommended. The antenna I noticed the “creep“ with is a 40 foot vertical dipole, which has quite low impedance on 40m and 80m even without the “help” of a 4:1 balun.
> 
> My purpose in asking my question was to ascertain whether it is safe to run my set up at 100 W despite the creep. I can easily tweak a dial to retune when running digital. And a creep never rises past 1.4:1, and usually less. I don’t care about perfection, I just want to make sure I’m not risking blowing any disc capacitors. My educated guess is that everything is fine, I simply wanted a reality check here.
> 
> Rest assured, if I was going to run higher power, I would be making the suggested modifications. But that’s not really in the cards right now.
> 
> --Peter, KD7MW
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