[AMRadio] Power Levels

[John E. Coleman]

I love it Bacon:
	As usual, you have said all well.
	May I post this as well on my Web site?
	I have some other writing that I have done myself with some
drawing that I might send to you for editing if you feel up to it.

73, John, WA5BXO


-----Original Message-----
From: amradio-admin at mailman.qth.net
[mailto:amradio-admin at mailman.qth.net] On Behalf Of Bob Bruhns
Sent: Sunday, June 30, 2002 3:19 PM
To: amradio at mailman.qth.net
Subject: Re: [AMRadio] Power Levels

Hi Dave,

Classical AM has a carrier, an upper sideband and a lower
sideband.  However, the power is not distributed 1:1:1
A few good references:

The older ARRL Handbook issues, maybe 1981 and back

Radio Engineers Handbook, by Frederick Terman, McGraw-Hill
1943

The Mechaics of Modulation" by Paul R. Huntsinger, October
1931 QST, with a missing figure or to appearing in
Corrections, QST, November 1931 (page 34).

"Lop Sided Speech and Modulation" by George Grammer,
February, 1940 QST

"A Course in Radio Fundamentals" by George Grammer (Part 6 -
Modulation, QST November, 1942)

Also look over anything you can find by John. R. Costas,
W2CRR.  (I don't know whether he is still living, so his
callsign may be reissued by now.)  Also look for Norgaard.
These guys were pioneers in sideband, and they were fooling
with DSB with and without carrier.  Costas is also famous
for the Costas-loop, used in Phase Locked Loops to this day.

Bacon, WA3WDR


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