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I think I have one of those Blonder Tongue units stashed away.
Another thing to consider is that at higher frequencies cavities and mechanical structures around that size can have capacitance and inductance at values suitable to contribute/be integral to the operation of the circuit. You may have to look for parts that are not on the list to fully understand the operation.
I recall reading a 50's article on building either an antenna preamp or a UHF converter based on a 'Pencil tube' where the physical enclosure actually comprised a substantial part of the tuned circuit it used.
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