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A final observation if I may..
I had a Stewart Warner 385, which is much like the AK30 in
that it had 6 tubes (71A output) and the 3 tuning caps
ganged together.
This set had poor sensitivity which I traced to mis-alignment of the tuning caps. I recall I had to loosen some set screws and slightly move the individual caps, one at a
time, to get maximum output from a good station and then re-tighten the screws.
Thereafter I got good perfomance from a 15ft indoor antenna (actually the aluminum track of the window blinds). I still use this antenna but now with a 5 tube Arborphone 27.
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