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FYI: Modern radios use a digital tuning scheme -- a synthesized VFO
The "large tuning capacitor" types were analog tuning New Digital types like your R75 -- are in selectable discrete steps i.e., from as low as 1 Hertz -- up to 100 kHz see -- page 12 and 13 of the ICOM Manual. Also a 1 MHz "Quick Tuning" increment can be used for fast tuning. -- 73 From The Signal In The Noise Caveat Lector Ya All "John Garrison" wrote in message ... Variable Frequency Oscillator--basically the tuning knob, or slew tuning buttons as the case may be. I believe it to be somewhat more evolved than the tuner that adjusts a large tuning capacitor, but then maybe not. In any case when you turn the VFO, you are changing the frequency you are listening to. "Lawrence Rogers" wrote in message ... The instruction manual that comes with my brand new R75 talks about memory and VFO. I understand memory, but what is VFO? TIA, Larry Rogers Hilo -- Lawrence Rogers Hilo, Hawaii 96720-4091 Re Tokyo Stories see http://www.ucpress.edu/books/pages/8407.html --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.518 / Virus Database: 316 - Release Date: 9/12/2003 |
#2
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Much clearer for the original poster with the distinction between analog and
digital. Didn't think of any of that for some reason. Digital tuning, phase locked loop and all though can open a can of worms for the newbie to digest. Despite that all my radios have a digital VFO, when I turn the darn thing I think of strings and a big capacitor being adjusted. Oh well. "Caveat Lector" wrote in message news:3uF9b.135768$kP.76555@fed1read03... FYI: Modern radios use a digital tuning scheme -- a synthesized VFO The "large tuning capacitor" types were analog tuning New Digital types like your R75 -- are in selectable discrete steps i.e., from as low as 1 Hertz -- up to 100 kHz see -- page 12 and 13 of the ICOM Manual. Also a 1 MHz "Quick Tuning" increment can be used for fast tuning. -- 73 From The Signal In The Noise Caveat Lector Ya All "John Garrison" wrote in message ... Variable Frequency Oscillator--basically the tuning knob, or slew tuning buttons as the case may be. I believe it to be somewhat more evolved than the tuner that adjusts a large tuning capacitor, but then maybe not. In any case when you turn the VFO, you are changing the frequency you are listening to. "Lawrence Rogers" wrote in message ... The instruction manual that comes with my brand new R75 talks about memory and VFO. I understand memory, but what is VFO? TIA, Larry Rogers Hilo -- Lawrence Rogers Hilo, Hawaii 96720-4091 Re Tokyo Stories see http://www.ucpress.edu/books/pages/8407.html --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.518 / Virus Database: 316 - Release Date: 9/12/2003 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.518 / Virus Database: 316 - Release Date: 9/11/2003 |
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