[TenTec] 229 swr circuit

[Ron Castro]

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 at contesting.com [mailto:tentec-bounces at 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