[TenTec] Model 238 Tuner problems?

[Robert & Linda McGraw K4TAX]

Yes, I've had the same problem. It is the heating of one of the ceramic caps
located at the back of the HI-Z - BYPASS - LO-Z switch at the lower rear of
the tuner.  Even though it's rated for 1KV or so, it is inadequate for some
phase angles of RF current.  I removed mine, replaced them with a couple of
transmitting mica's.  Problem solved.

73
Bob K4TAX

----- Original Message -----
From: "Duane A Calvin" <ac5aa@juno.com>
To: <tentec@contesting.com>
Sent: Monday, October 01, 2001 8:58 AM
Subject: [TenTec] Model 238 Tuner problems?


> Has anyone had a problem with their Model 238 tuner, especially if you
> run a KW?  Just curious - I had something happen during the CQ/RJ RTTY
> contest last weekend which, at first, I thought meant I'd blown another
> doorknob on my vertical (oh no - - more $$$!).  Then I got a similar
> indication when I switched to my G5RV.  The only common item is the
> tuner.  SWR kept changing and I'd have to retune.  On 80m, it would start
> low and then skyrocket.  They are different enough indications that I
> might have 2 problems, but I'd like to see how others have found their
> Model 238.  I've had mine for 3-4 years with not a single problem.
>
>         73, Duane
>
>
> Duane Calvin, AC5AA
> Austin, Texas
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