On Sun, 31 Dec 2006 23:43:00 GMT, "David Eduardo"
wrote:


Back in the early 70's, I was using an adapted parametric equalizer to aid
in DXing. I had it connected to the output of my R390 by Hammarlund and
output it to a low noise amplifier that had a headphone out. This allowed me
to do some very nice things on adjacent channels, like adjusting the audio
to match the desired station and not the interfering one, or to narrow the
bandwidth of the audio to make the weaker signal less covered by splatter...
or to remove lower frequency hets that added to the interference.

At that time, the only good parametrics were designed for broadcast and
sound reinforcement use, so matching levels and impedances was a big issue,
but I found that using this sort of device (the eq can amp cost more than
the R390, which I had bought new) on MW and tropical band DX made all the
difference in the world.

I believe only Collins made the R-390.

http://en.wikipedia.org/wiki/George_Massenburg