My first thought on comments about noise on a receiver is that the radio they are comparing it to just can't hear as well.
73, Jim ----- Original Message ----- From: "Steve Wedge" <[email protected]> To: "John Chappell G3XRJ" <[email protected]>; <[email protected]> Sent: Friday, October 08, 2010 9:25 AM Subject: Re: [Elecraft] K3 AGC THR doesn't go low enough > John, I've noticed the same thing: the AGC does seem to make the > receiver - in the absence of signals - roar quite a bit with my early > (#770) K3. > > I've attributed a lot of the noise to computer and suburban hash, but > listening with my old Drake receiver shows things much quieter. Noise > reduction does help, but it would be nice to quiet this down as John > suggests. > > My .02 > > Steve, W1ES > > -----Original Message----- >>From: John Chappell G3XRJ <[email protected]> >>Sent: Oct 8, 2010 8:22 AM >>To: [email protected] >>Subject: [Elecraft] K3 AGC THR doesn't go low enough >> >>I like to listen to a receiver with the rf gain set to just below >>antenna atmospheric noise and AGC on - and not raising the rf gain when >>it is switched on. >> >>My K3 is srl 46xx and the only way I get the quiet background I desire >>is to turn the AGC off. This necessitates having the AF limiter turned >>on to save my ears and hopefully the speaker output chip. >> >>I've played around with various AGC settings and in particular the >>AGC THR - which if it would go 2 or 3 points lower would appear to >>address the problem. >> >>Anyway, to save a thousand words, this recording sets the scene >>http://tinyurl.com/38qo9ud >> >>- made from Main Rx on 3670khz with 2.8khz filter passband set to >>Normal, NR and NB Off. >>Sub Rx is identical in performance in this respect. >> >>In all other respects that I use it the K3 is a stunner. >> >>John G3XRJ >>______________________________________________________________ >>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
