I am testing the advanced beta with enhanced LF audio capability. I have not performed any hardware modifications to enhance LF performance. I have the beta hardware band pass filter installed.
I like the fuller sounding audio. It is possible to shift the IF pass band too low such that can you lose opposite sideband suppression (CW). I am still experimenting with settings and can shift the IF pass band down partially for fuller sound and still have quite good opposite sideband suppression. So this just becomes a matter of optimizing what I hear in the headphones. I found a new desire to shift my side tone lower. I got one of those loud audio blasts, first one ever. I was on 40M CW mode 500 Hz filter on the main Rx; 2.7 KHz filter in the sub Rx. I was in diversity reception mode. I shifted bands down to the broadcast band to see what 13 KHz AM sounded like. I got a very loud sound blast in one ear (sub receiver). I have never experienced this phenomenon before. I can not repeat the problem. The sub receiver does not have a 13 KHz filter, just a 2.7. I normally turn the sub Rx off when I listen to wideband. Perhaps the filter switching got confused when I went to the broadcast band and there was a momentary time when the IF was being routed through a nonexistent filter slot. I am just speculating what might have happened. Mike Scott - AE6WA Tarzana, CA (DM04 / near LA) NAQCC 3535 K3-100 #508 / KX1 #1311 ______________________________________________________________ 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
