[TenTec] Ten Tec vs. Inrad 9 MHz Filters

[AC5E@aol.com (AC5E@aol.com)]

HI: As a very pleased Orion owner, no the optional filters are NOT necessary 
for CW. In fact, mine came with the options turned off, and it was several 
days before I got far enough down in the manual to see that I needed to 
enable them. 

Selectivity was amazing with just the DSP, and it's nothing short of awesome 
with the filters enabled.

73  Pete Allen  AC5E