OK, I found that QEX after much fuming and searching, under some recipes,
bills and phone books in the kitchen ...

Giessinger doesn't refer to Day's work. Among several references is one to
a work by Robert Dick in the Jan/Feb 1999 issue of QEX.

I won't try to paraphrase extensively, since I don't think I understand the
technique well enough to do it properly. It involves analyzing vowel
sounds, which have a fundamental and harmonics of predictable relative
amplitudes. I suppose you find the harmonic peaks and note the error in
their frequency relationship caused by mis-tuning, and there you go. Sounds
simple, if you don't have to actually do it. ;^)

I can see where it would be pretty straightforward (relatively) with music,
but doing this with voice is impressive to me.

Apparently similar techniques are now being used in high end rigs like the
IC-7800.

73--Nick, WA5BDU

"J. Mc Laughlin" wrote in message
...
Dear Nick: Fascinating. When you find the QEX article please report
back.
73 Mac N8TT

--
J. Mc Laughlin; Michigan U.S.A.
Home:
"Nick Kennedy" wrote in message
news:BWcdf.2375$ih5.1677@dukeread11...
"J. Mc Laughlin" wrote in message
...
Here is the title and author's name:
A method for accurate receiver tuning and precise measurement of the
carrier
frequency of voice-modulated, suppressed-carrier, single-sideband
radio
signals
Day, Lucius Boyden.

I do not know where it might be read on the WEB. 73 Mac N8TT


It sounds similar to a recent article. I see that in the July/August
QEX
there was an article called "A Blind Automatic Frequency Control
Algorithm
for Single Sideband" by Geissinger. I can't find that issue, so don't
know
it used Mr. Day's technique or not.

73--Nick, WA5BDU