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As late as the 9T-246 sets lacked RF amps and good image rejection ... and
even good rejection of low band signals when tuned to the high band ...
or vice versa.
The RF design of the TRK-12, while generating absolutely beautiful
frequency sweeps, is an ABYSMAL design that the engineers
MUST have known had coils and wire that were FAR too big.
When the band changes happened, they had to rewind the coils,
and it wasn't pretty. My set was never sold, being apparently used
as a test bed for changes by the RCA engineers, and it has
rather klunky looking change places. Maybe they though that bigger coils would have better Q.
And oh yes ... the fine tuning barely has enough range to tune the FM
signal acorss the split carrier IF discriminator over 200 kHZ!
Yet the final response at the video detector output is identical
to that of a properly tuned CT-100.
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