"Arthur Pozner" wrote in message
...
|
How
| could anyone even compare any Collins design/product with a
portable?
| I am outraged. This is absurd.
| The audio reproduction and flexibility of having so many controls is
| nothing remotely available on ANY receiver I encountered in
solid
| state receivers (commercial/milspec/consumer/amateur).
----

As the poster alluded above, the R-390 was a Collins design, and
they also made some. But, the R-390 was a military specification
number, and it was made by several companies, including:
Stewart-Warner, Motorola, Electronic Assistance Corp, as well
as Collins. There were, indeed, varying points of difference in
quality .. but, all of them met the 'military specs' which did not
necessarily mean that was the best which the receiver could do.
Military Spec was a minimal common denominator all had to meet.|

R-390(non A) does not have the audio output power level of
SP-600. It has 0.5 W vs 2W. The LC filters in wide IF position must
be very similar- 16Kc and 13Kc (slightly more in Collins).
Just for fun I connected Sony 7600 to a Hi-fi stereo not long ago.
Sounded pretty decent for a portable on SW (especially with the synch
on). Did synchronous detectors exist in the
fifties?