"Telamon" wrote in message
...

That's because the age of the design has nothing to do with whether it
is 1, 2, or 3 conversion. There were double and triple conversion
receivers back then.

Yes, but back then, multiple conversion was just downconversion. After the
crystal controlled synthizers got cheap enough, the current popular
up/downconversion scheme became practical. This way is particularly
inexpensive, because the images can be attenuated with a low pass or
bandpass filter.


What determines the number of conversions is cost.

And it's cheaper to hit a particular image rejection target across a wide
band with multiple conversion.

Frank Dresser