[Elecraft] one mo' time on roofing filters, etc

[Bill Tippett]

KR2Q:
 >PS... And roofing filter "rage" has been around
for quite some time...it is far from an Elecraft phenom.

         Yep...at least since the mid-70's when Sherwood
introduced a 600 Hz roofing filter for the Drake R4C.
It addressed exactly the same IMD/BDR issues as today.
Receiver performance is not new...the JA rigs just went
to sleep for about 30 years while obsessing with FM,
general coverage receive and other trivia.  Meanwhile
basic RX performance went down the tubes when they
forced 15-20 kHz roofing filters on all of us.

                                         73,  Bill  W4ZV