I had 2 CW filters in my TenTec OmniV and did a lot of A/B comparing with them. One was an 8 pole Inrad 400 Hz filter and the other was a 6 pole TenTec 500 Hz filter. I had them both in the rig at the same time specifically to decide which one to keep. I was able to detect the steeper skirts of the 8 pole filter as well as the narrower passband, but the factor that eventually tipped the scales was ultimate rejection. The TT filter, had better ultimate rejection. Once I tuned past a signal, it went away and didn't come back. With the Inrad filter, the signal would drop quicker, hit bottom and then come back up. I could hear strong signals 6-8 KHz away.
So, I went with the TT filter because for me, ultimate rejection was more important than the slightly narrower passband. Now, the question is whether or not the 5 vs 8 pole filters for the K3 have different levels of ultimate rejection. If they do, then the choice has become tougher. - Keith N1AS - - K2 5411.ssb.100 - -----Original Message----- From: William Hein, NT1Y What's the performance difference between the 8-pole and 5-pole K3 roofing filters? For crowded-band CW performance am I better off with a 5-pole 200-Hz or a 8-pole 250-Hz filter? _______________________________________________ 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
