[TenTec] DUAL CONVERSION

[Ken Brown]

>
> 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