In article , Bill wrote:

John Byrns wrote:

In article , Bill wrote:

I wish that Jon could actually experience this and see that his
thinking 'outside the box' isn't going to be an automatic revelation
that 80 years of radio has simply overlooked.
Thirty minutes on the bench could save 'light-hours' of ramblings.

I don't follow your reasoning on this, what is Jon going to learn in
"Thirty minutes on the bench"? I would venture next to nothing? Thirty
weeks on the bench might be more like it, and even then there won't be
time to explore all avenues. As far as 80 years of radio go, Jon's
constraints are different than might have existed when tube radios were a
mass application, he may be able to make different tradeoffs than were
practical then.

Don't be silly just for the sake of being a 'devils advocate', John.

I'm not being the "devils advocate", I'm just saying that the problem is
more complex than you are making it out to be and a mere thirty minutes on
the bench is not going to resolve much.

If Jon can achieve his plug-in TRF boards with any semblance of a $1.95
flea-market AA5 selectivity then I would be pleased.

These threads have grown to a point where I have not been able to follow
them all. I have been following most of the discussions like the
superhet, TRF, and segmentation of the MW band posts, but I have not yet
read the ones related to channel based receivers, which I hope to read
through as time permits. Perhaps that explains my confusion with relation
to the "thirty minutes on the bench", if you are referring to a
channelized TRF approach to receive all 117 or so MW channels, then I
would think you wouldn't need to go to the bench at all to realize it
isn't practical. A smaller number of channels, say half a dozen or so
might be practical.

I think the best approach for the all out audiophile would be the one
suggested by Randy, or was it Sherry? Gutting out a National NC-100, and
rebuilding the band selection assembly with 5 sets of 3 optimized band
pass filters to segment the MW band into 5 parts.


Regards,

John Byrns


Surf my web pages at, http://users.rcn.com/jbyrns/