[EMAIL PROTECTED] wrote:
The real Standard of Comparison among ham receivers of those days was the
Collins 75S-3. And for what they cost, they should have been!
Well ... YMMV, but next to each other on the same antenna, my 2B was a
significantly better CW rx, particularly in heavy QRM and/or adjacent
key clix, than my 75S3. The mech filter sounded really good, of course,
but that 50KHz IF PBT really killed QRM. I also had the 2BQ, which was
very smooth also, but I tended not to use it very much. It did ring
badly at high gain settings.
Compared to the K2, I can only remember the 75S3 and 2B (they're long
gone) and my memory is a tad leaky these days, but I think in an A/B/C
test, the K2 RX would come out on top in a real, on-the-air test in SS
or IARU, possibly by a fair margin, if you've judiciously set your
filters to sensible bandwidths.
RX specs are important of course (I *am* an engineer), but the final
analysis for me was always "how well does it perform in noise, QRM, and
real band conditions. Top-flight specs usually perform very well in the
real world. Sometimes, circumstances just combine, and
less-than-top-flight RX engineering specs may couple with the right
combination of design features to perform extremely well. Possibly that
might have been the 2B?
The 75S3 was a really great RX, no doubt and I wish I still had my
S-line. eBay has Collins pointer knobs for $34.95 and the 11-pin
connectors for $15.00, but I didn't find any complete S-lines.
Fred K6DGW
Auburn CA CM98lw
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