For those with 238 and 229 tuners, here is a link to an article on how to
do the capacitor replacement:
http://n6ie.com/Ten_Tec_238.html
Ron Castro
N6IE
www.N6IE.com
Member:
REDXA NCCC
NCDXF ARRL
-----Original Message-----
From: tentec-bounces@contesting.com [mailto:tentec-bounces@contesting.com]
On Behalf Of Bob McGraw - K4TAX
Sent: Tuesday, July 03, 2012 4:45 AM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] 229 swr circuit
With my 238 tuner I too experienced issues with observed SWR drifting at
higher power values, but only under certain antenna configurations.
Conclusion, the 220pf capacitors wired parallel and associated with the Hi Z
and Lo Z switch were getting hot, thus changing values. I replaced each
pair with a Russian made 470 pf 2KV doorknob style capacitor. These can
be found on E-Bay for a nominal price.
Mounting was accomplished by drilling holes through the bottom plate in the
area of the original capacitors. It is a tight place to work but with a
little planning the result is a very nice professional job.
Problem solved.
73
Bob, K4TAX
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