My experience with roofing filters is from using Orion and Orion ii. On my first transceiver, Orion, I ordered the narrow filters, and found anything less than about 600 cycles not to be useful.
>From a practical point of view, a roof of even 1 kc was more than adequate for >CW, RTTY, and PSK operation On my second transceiver, Orion II, I did not waste my money on these 200 cycle filters. If you are a purist, maybe once a month you will be in qso with a IK3 station on PSK (31 cycles wide) and find a W2 cranking up 50 cycles away at high power, and your AGC will be affected by it. Then it might be helpbul to use a very narrow filter, but in my opinion, this seldom to none experience it is not worth the bucks. DSP bandwidth adjustments will handle most situations just fine. I suggest nothing smaller than 400 cycles as a roofing filter. Ken K5WK _______________________________________________ Elecraft mailing list Post to: [email protected] 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
