"Mike Knudsen" wrote in message
...
In article , Dan Robinson

writes:

R388s, which do not have the mechanical filters
like the 51J4s, often go for high prices if they are
in excellent to "new" condition (the latter being quite rare).

How does the value of an R388 compare with the nearly-identical 51J3?
Is there any functional difference? Do Collins collectors prefer the
"pure"
51J3 to the military R-388?

But as far as performance goes, 51J4s with the
filters are just great and provide greater flexibliity.

Yep, when playing with my R388 I often wish for the better selectivity
control
of the J4. Xtal filters just don't hack AM or SSB all that well.

Though I don't suppose even the J4 has a product detector, right?
73, Mike K. AA1UK

No, it did not have a product detector. I did do one author's mod to these
receivers over the years, where you convert the cathode follower for the
I.F. output to a product detector. It was great, because the mode switch on
the front panel has an extra set of contacts that you can use for routing
the audio.

Pete