Any strong unmodulated carrier seems to work. Theses are the things that you would use the autonotch filter for. Not sure if this sounds exactly like caddisflies but I saw a horror movie 25-30 years ago that when bad stuff was going to happen the caddisflies would all start making a very loud noise that sounds like this. Watch out for what follows, very loud and you can't turn it down, have to power off. Bob KB1FRW
Steve Ellington wrote: > Bob: > "The Birdie"? What birdie are you speak of that we too might tune > across it. I have this urge to listen to caddisflies. > > Steve > N4LQ > [email protected] > ----- Original Message ----- From: "Bob W Allen" <[email protected]> > To: <[email protected]>; <[email protected]> > Sent: Saturday, August 29, 2009 3:22 PM > Subject: Re: [Elecraft] Uncontrolled full volume with NR Firmware > 3.27- Warning very loud!! > > >> Now I can make this happen repeatedly, with the NR at 1-4 and the notch >> filter on auto as I tune across the birdie the volume goes very loud, it >> is louder than any noise I can get the radio to do normally with the AF >> all the way up. >> I have discovered that this only does this in the NR 1-1 to 1-4 range, >> very repeatable. As you tune through the birdie the radio starts making >> a noise like caddisflies (moderate high pitched fast oscillation) then >> it becomes very loud white noise. I don't spend anytime playing with the >> controls but I know the AF does nothing. >> I copied this to Elecraft tech support. >> MCU (uC) 03.27, main DSP (d1)2.24, aux DSP (d2, if KRX3 is present), >> flash parameters (FL)01.02, and KDVR3 controller (dr )01.03. >> This is very loud, be careful!! >> Bob >> KB1FRW >> 73 >> >> Bob Allen wrote: >>> An odd thing happened today, I was tuning through an area on 20m >>> where I >>> have a birdie, about 14.270-14.273. >>> The noise reduction was on at 1-3 I think, I don't know what state the >>> notch filter was at or the noise blanker, as I tuned into this area the >>> audio was a bit odd, like screechy, I didn't think to much of that >>> because of how the noise reduction works around birdies, but it was >>> different than I had heard in the past. >>> All of a sudden the volume in the headset and the internal speaker went >>> to max and turning the volume control had no effect. >>> I shutdown the radio to avoid damaging things and when I turned it back >>> on everything was fine and I can't make it do this again. >>> Very odd (and painful), wondering if this has happened to anyone else. >>> Bob >>> KB1FRW >>> 73 >>> ______________________________________________________________ >>> 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 >>> >>> >>> >>> >> >> ______________________________________________________________ >> 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 > > > ______________________________________________________________ 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
