[TenTec] 238 Manual Addendum (extra cap)

Bill Acito w1pa at hotmail.com
Tue Jun 22 13:47:40 EDT 2021

If you add the extra cap to the back of the 238 tuner, it is added to position 3, 4, and 5 ---  not just 5. I found this out while doing a repair. The schematic seems to indicate this, but the verbiage in the manual implies it is only added to position 5.

I don’t know if this true of later versions (e.g. 238A), but I confirmed it on two original 238’s.
This means if you decide to just leave the cap there under normal usage, you are missing a large chunk of capacitor range between the end of 1-2, and 3-5 plus the cap.



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