Re: 2.8kHz roofing filter

Posted by ab2tc on Oct 25, 2010; 9:52pm
URL: http://elecraft.85.s1.nabble.com/2-8kHz-roofing-filter-tp5665995p5672555.html

I want to make two macros, one that goes to USB mode and sets the RX EQ accordingly, another that goes to LSB and sets the RX EQ for that mode. This would be very simple to operate. But there is no RX equalizer set command that I can see (there is one for TX EQ). Another poster had this same questions a few weeks back and I do not think he got an answer. Any ideas anyone?

AB2TC - Knut

Bill W4ZV wrote

Probably nothing you can do other than tweaking EQ per mode.  It's caused by the filter having an actual amplitude tilt in its passband.  In USB the upward tilt is on the upper side and in LSB it's on the lower side.  I don't think you would notice the small 8-pole offset (typically 50 Hz) in a 2.8k filter, but they are more noticeable in CW filters.

73,  Bill