Brian,

Without going into the technical aspects, I'll simply say that
a double-conversion superheterodyne receiver offers improved
sensitivity and selectivity over a single-conversion superhet.
In the early days of CB (ie, the 1960s), the majority of CB
sets used a single-conversion receiver, while some of the high-
end models used double-conversion. As CB became more populer
in the late 1960s and more stations came on the air, it became
necessary to improve receiver selectivity to reduce the problem
of "bleedover" from adjacent channels. With that in mind, the
majority of CB manufacturers began using double superhets for
even their "cheap" radios, and from then on it became standard
practice.

If you would like to learn about the technical reasons for all
of this, pay a visit to your public library and look for an
ARRL Radio Amateur's Handbook, and read up on receiver theory
and design.

73,
Dean K5DH


In article ,
says...

Hi, Does anyone know What Double Super Hetrodyne does in a CB radio.
I have a GE 40 channel cb and it has Double Super Hetrodyne.
Brian - Las Vegas