Wayne, are we going to be able to use the existing microphones for the K3? I have the mobile mic for the K2, as well as the desk mic and the Heil headset all wired for Kenwood.
Stan Rife W5EWA Houston, TX K2 S/N 4216 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Bill W5WVO Sent: Monday, April 30, 2007 12:05 AM To: wayne burdick Cc: [email protected] Subject: [Elecraft] Re: K3 S meter Hmmm... I just went back through my reflector mail as well as the published Omni-VII literature, and I can't find anywhere it says 6 dB per S-unit. I could have swore that I read that. Could be I assumed it, though... That used to be one of the "standards" in days gone by... LONG gone by... Just did the math based on S9 = 50 uV, and if you figure 1 uV for S0, you get 3.775 dB per S-unit, pretty much what you said. If you use 6 dB per S-unit, a 0.25 uV signal (nominal minimum detectable) would be between an S1 and an S2. Is this "right"? On the face of it, it doesn't seem so -- but if you go by the old-time verbal strength descriptions for the S scale, an S1 is a "barely perceptible" signal. Neglecting any atmospheric noise floor for the moment, a barely perceptible signal in a modern HF receiver would be about 0.25 uV, so by these lights, maybe the 6 dB per S-unit isn't so far off. Maybe 5 dB makes the most sense, since this places the minimal detectable signal near S0, and anything above that would move the S-meter (including the atmospheric noise floor). I think that would be my vote. Bill / W5WVO wayne burdick wrote: > I think 3.5 to 4 dB per S-unit is closer to operator expectations, > Bill, but I'm sure TT has their reasons. > > We do agree on 50 uV = S9. Whether the S-meter compensates for the > preamp and attenuator is an interesting subject; we might provide a > menu entry to turn this on/off. > > 73, > Wayne > N6KR > > > On Apr 29, 2007, at 5:15 PM, Bill W5WVO wrote: > >> Wayne, >> >> Just as a data point, in case you don't know -- the Omni-VII features >> a calibrated S-meter (50 uV = S9, 1 S-unit = 6 dB) on all bands, and >> it always reads the same for a given signal level regardless of the >> state of pre-amps or attenuators switched in/out. > >> --- > > http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
