dialtone and Tunelab

[David Ilvedson]

With my SAT III just turned on in Tune Mode my dial tone is dead on at A440
or at least the pattern doesn't move.

David I.

> -----Original Message-----
> From: owner-pianotech@ptg.org [mailto:owner-pianotech@ptg.org]On Behalf
> Of Richard Moody
> Sent: Wednesday, November 01, 2000 8:50 AM
> To: piano tech
> Subject: dialtone and Tunelab
>
>
>
>
> ----- Original Message -----
> From: John Lillico, RPT <staytuned@idirect.com>
> To: <pianotech@ptg.org>
> Sent: Saturday, October 28, 2000 9:04 PM
> Subject: Re: SOT
>
>
> > >Pick up your phone and let the SOT listen to the dial tone.
> In my area,
> and
> > >presumably elsewhere, the dial tone is a square wave audio 440
> cps tone.
> The
> > >lights should stop dead on.
> > >
> > >Bill Simon
> > >Phoenix
> >
> > Can anyone confirm what Bill says here. I've always known the
> (upper) dial
> tone to be real close to A440 but figured it was about eight cents sharp!
> >
> > Bill, if you're right, I've got an Accu-fork for sale,
> batteries included.
> >
> > John Lillico, RPT,
> > Oakville, Ontario
> > (on the Bell Canada system)
>
> Its a simple thing to do.  Open Robert Scott's Tunelab.  Put a mic to
> the ear piece of the phone, or have Tunelab play A440 and listen to the
> beats. ie listen to the dialtone and Tunelab at the same time.   Click on
> the loudspeaker icon (or s) press-- A  and  4.   Now do a control (crtl) O
> and enter  -4  so Tunelab is playing A440 4 cents flat.  Listen to the
> beats.  You may have to wait 3 to 5 seconds to hear the first
> beat but there
> they are, very sloooow but
> distinct.  amazing!  So on my phone Ma Bell's dialtone is very close to 4
> cents
> flat.  Mic'ing shows A running flat, and a faint F pretty much
> on.  The dial
> tone always sounded gargley to me, that must be the beats between A and
> F---ric
>
>
>