> I wish I could set it higher than 008. I am also in a > relatively quiet location but on 20m with an AGC threshold of > 008 my atmospheric noise is normally above the AGC threshold.
If one looks at Jack Smith's graphs, the K2 threshold (between -80 and -90 dBm) would be about 11 or 12 for the K3 and the slope is about 5 or 6. Jack's measurements show that even at 8, the K3's AGC threshold (onset of AGC) is down around -100dBm. Sherwood shows the K3's AGC threshold at 2.1 uV vs. 10 uV (no preamp) for the K2 and .6uV vs. 1.7 uV with the preamp. I find it interesting that Sherwood's measurements of the FT-1000D (6 uV) and FT-1000MP MK V (3 uV) also show higher AGC thresholds with the preamplifier on. 73, ... Joe, W4TV > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of ab2tc > Sent: Tuesday, February 02, 2010 5:08 PM > To: [email protected] > Subject: Re: [Elecraft] Attenuator and RF Gain Settings > > > > Hi, > > I wish I could set it higher than 008. I am also in a > relatively quiet location but on 20m with an AGC threshold of > 008 my atmospheric noise is normally above the AGC threshold. > So when I want comfortable listening I back off the RF gain > until the S-meter shows about S4 or so. Not a big problem, > but I would prefer that the AGC threshold could go higher. > Having it stored per-band, too, would be really, really nice > and it makes sense. > > Knut - AQB2TC > > > Don Wilhelm-4 wrote: > > > > I just thought of something that might help those confused > by the AGC > > Threshold setting. > > One other way to look at the required AGC Threshold level > is to think of > > it as an S-meter level > > If your noise is S-1 or lower (on the K3's S-meter), you > can set the > > Threshold to 002 or higher and all may be well > > OTOH, if you have an S-7 noise level indicated, the AGC > Threshold should > > be set to 008 or higher. > > <snip> > > > > -- > View this message in context: > http://n2.nabble.com/Attenuator-and-RF-Gain-Settings-tp4503505 p4504035.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ 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
