>It's not unusual for the 8-pole filters to have small offsets, which would be particularly noticeable if on the bass side of the >passband. I've heard of up to 80 Hz (0.08) in some CW filters. Anything large than that, indicates something else may be going >on (like accidentally resetting the 5-pole offset to zero as K7SV noted in the original post).
Could someone describe a procedure to measure filter offset. I have spectragram (can't remember the real name) software on my PC. I have a five pole 2.7 KHz in each of main and subreceiver. They are matched to -0.87 but I would like to measure and split the difference if there is one. I do notice that the main rx filter has enough of a passband slope that USB and LSB frequency response is notably different. I can hear a significant change to background noise color when I change modes. For this I am hoping to have mode-specific equalization some day. It is also possible that a different offset might improve what I am hearing. Mike Scott AE6WA Tarzana, CA K3/100 SN508 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
