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 > > >
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