[HBR] The long, SLOW HBR project

[Bill Cromwell]

Hi Walt,

Your running dialog is motivating me to build a 'modified' HBR, too. I
think you added a crystal filter at your first I.F. and I plan to do
that, too. I am planning to stay closer to the original design first
I.F. and build the filter at that frequency ala HR10 (one of which I
have). I also have 3.395 and 9 mc filters available. For the second I.F.
I'm using the 85 kc cans and BFO coil from an R-23. The RF selectivity
will only be an SSB bandwidth and so something like a selectoject or
other audio filter will have to help out for anything narrower. I have
been doing pretty well using a 3.5 kc SSB bandwidth for CW use so it
shouldn't be a problem.

In other HBR matters, I have been snagging old transistor radios for a
buck or two (or a quarter) to use as parts mules for solid state HBRs -
but - the darned things all work. I have been playing with those and the
'loopstick' antennas are very effective at sorting out signals from
noise. The small transistor radios are pretty easy to turn to take
advantage of the antenna. It's a real trip listening to radio theater
from stations on the far side of North America. Deja vu.

Good luck with yours.

73,

Bill  KU8H