Posted by
Bill VanAlstyne W5WVO on
Jul 03, 2008; 6:20pm
URL: http://elecraft.85.s1.nabble.com/VFO-fine-coarse-tuning-tp365854p365856.html
Hi Ron,
"Channelization" is a subject that is beginning to create more and more
debate on the air. I must admit that, being a 6m operator where
channelization makes sense other than in a contest environment (the band is
large -- why QRM each other?), I might have a predisposition in that
direction.
But aside from the channelization debate, yes, I understand your initial
objection. The way to solve that is to simply leave the actual VFO frequency
unchanged when pressing the COARSE button -- but as soon as the VFO
frequency is moved, drop the offset.
Part of my "intuitive" feeling about this undoubtedly comes from how the
TS-2000 was designed to work, and I guess I'm used to that. I don't know
about current FT amd IC rigs.
Bill W5WVO
----- Original Message -----
From: "Ron D'Eau Claire" <
[hidden email]>
To: "'[Elecraft]'" <
[hidden email]>
Sent: Thursday, July 03, 2008 12:04 PM
Subject: RE: [Elecraft] [K3] VFO fine-coarse tuning
> The problem is that if you changed the tuning rate when not at a ".000"
> setting and the system automatically put you on a ".000" setting, the rig
> would change frequency by that amount, either xmit or receive!
>
> Normally you'll be going from fine to coarse, so one would expect that
you'd
> not care about the digits you're hiding or the offset they represent since
> you're hiding them.
>
> But, with today's tendency for some Hams to "channelize", for example
> routinely assuming that SSB stations are on exactly 2.5 kHz intervals
across
> the SSB sub band, it can sometimes result in an apparent "tuning error"
> unless you go to the fine rate and correct the offset.
>
> One hilarious episode happened to me when I tuned up on 75 meter SSB one
> morning and signed my call. A station called me back saying I was "off
> frequency".
>
> "Off frequency?" I wasn't in a QSO. I replied and asked him what he meant.
> He said that I was a few hundred Hz "high".
>
> "High? High from what?"
>
> "You're at 3987.8 instead of at 3987.5 where you belong," he replied.
>
> I thought, "Oh my gosh! We really need a better examination question pool
> for the newbies!"
>
> Ron AC7AC
>
>
>
> -----Original Message-----
>
> Let's say I'm tuning in FINE mode (to the 1 Hz digit) and the VFO says
> 50.135.056. If I then go to COARSE (to the 100 Hz digit), tune to a VFO
> indication of, say, 50.145.0, I intuitively expect that the actual VFO
> frequency will be 50.145.000 -- but it continues to carry the FINE 10s and
> 1s digits as an offset, so the actual frequency is 50.145.056, which is
> revealed by tapping the FINE button. This was probably an intentional
design
> choice based on how other rigs work -- but it's not the way it seems like
it
> should be, to me. Intuitively, it seems like if it says 50.145.0, it
should
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