Circa '46 Emerson portable tube radio

[wa2ise]

Originally Posted by dieseljeep

There's nothing in the rules, that say the IF frequency, has to be 455KC. I'm actually surprised that the IF is 262KC. I guess they used it to minimize images, the same way, they used 262KC in most car radios.
...

TV sets back in the early post war days used an IF around 22MHz, then later 45MHz. But that was after channel 1 was deleted (channel 1 would have been in the middle of the 45MHz IF bandwidth).

Some prewar 45MHz band FM radios used an IF around 8MHz.

I think the FCC avoids assigning powerful transmitters on the popular IF frequencies. 455KHz, 10.7MHz, 45MHz and so on.