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As that radio does seem to have a tuned RF stage you might be able to improve the sensitivity through a little tweaking.
Also bear in mind, folks, when working on one of these SS radios that the same precautions need to be taken as in working on any series-wired tube radios; isolation transformer use is a good idea. And transistors are not as forgiving as tubes if a sudden ground fault occurs. Aside from the operator receiving a hearty 60~ handshake it is possible to wholesale a mess of transistors at the first touch of a screwdriver if the unit is not isolated....
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