>
> Correct and the accepted definition of Dual Conversion in the world of
> Superhetrodyne receiver design would be a radio with two distinct RF
> frequency IF's before detection or demodulation to audio.
>
And this made good sense when local oscillators were mixed with the RF
to get another RF (IF) in the following stage, AND when conversion to
audio was done with an AM or FM DETECTOR, NOT using a BFO. As soon as
you use a BFO (even in a plain AM detector, not a product detector) you
are again using yet another local oscillator to perform a heterodyne
conversion. We may have never called a "single conversion" (like to 455
kHz IF) receiver "double conversion" when we turned on the BFO, but
perhaps we should have.
DE N6KB
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