-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Erik N Basilier
My K3 ... interesting to do an A/B comparison to see how the receiver sounds with/without the narrow crystal filter for a given bandwidth. ... What has been observed by the group? --------------------------- I've not attempted such a complex test as you described (which I snipped out). I have the 500 Hz filter in my rig. As I narrow the DSP from 2 KHz to 550 Hz, I can hear a predictable narrowing of the passband with each step. When I step to 500 Hz and the narrow roofing filter kicks in, I can hear a distinct change, more than just the DSP narrowing I'd heard while stepping from 1000 Hz to 550 Hz. The effect is very noticeable. I don't think you'd have to construct some sort of (artificial) double-blind test to see what it does. Besides, what you really want to know is how does it play on the air. The best way to learn that is to play on the air :-) I have been able to get AGC pumping if I try. In all cases, going from 550 Hz to 500 Hz bandwidth took care of the pumping (roofing filter works) - Keith N1AS - - K3 711 - _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
