I forgot to hit reply all. -----Original Message----- From: Cady, Fred Sent: Friday, March 15, 2013 7:24 AM To: 'KD7YZ Bob' Subject: RE: [Elecraft] K3: Use VFO-B to select dBV
Hi Bob, I'm not at my book on that topic but from memory here goes: The dBv measurement is really great once you catch on to how it works. Note that dBV is NOT dB relative to a volt. It is relative to the last time you made the AFV voltage measurement. I think Tech Mode needs to be on. It used to, but maybe a firmware update made it available. Plug in the GO to get a solid signal at, say -73 dBm. So, get the VFO B display in the right state and then turn VFO B to show the AFV display. Wait until the AFV display settles on a value. Now rotate VFO B to dBV. It should settle to 0.0 dBV. Now, WITHOUT changing the VFO B, make a change in the input conditions. E.G, change the XG3 to -107 dBm. You should see the dbV display change to show the decrease in signal strength. If you have AGC on, you probably won't see -34 dBV. The trick to all this is once you set up for 0 dBV, DON'T change the VFO B back to the AFV display. Cheers, Fred KE7X "The Elecraft K3: Design, Configuration and Operation Second Edition" www.ke7x.com -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of KD7YZ Bob Sent: Friday, March 15, 2013 6:46 AM To: K3 List Subject: Re: [Elecraft] K3: Use VFO-B to select dBV On Friday Gregory used a Straight-Key to send: -------------Original Comment------- > Have you got Menu Tech Mode ON? Well, gee. Yes, I did have it on. Really. But now it is "OFF". So I will guess that the selection is not Persistent. Or that setting has another way of reverting to OFF. Not I am seeing 99.9dBV for an RMS reading of "1.09 A". This isn't too helpful though. Perhaps David can elaborate on how I get to a meaningful reading. thanks for the help. -- Best regards, Bob KD7YZ Win7-64bit + K3 ______________________________________________________________ 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
