My ears may be old, but I can't tell the difference in Class E rigs and
plate modulated Class C audio. With that said, I can tell the difference
about 5-10 Kc away with a properly loaded and modulated Class C rig..
Remember sharp switching of the carrier produces the same problems as old CW
rigs that were cathode keyed. The carrier was switched off and on very
sharply which produced key clicks.
Some of the Class E stuff does the same thing and the result is very broad
products. Rapid switching of the carrier produces some of that. Maybe some
day someone will develop a method of filtering that will eliminate the
problem.
73 Jim
W5JO
----- Original Message -----
From: "Peter Markavage" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Cc: <[email protected]>
Sent: Thursday, February 02, 2006 2:06 PM
Subject: Re: [Boatanchors] AM bandwidth
AOR and Ten-tec have already demonstrated on the air that 3 KHz digital
phone can work and sound very good. AOR claims "as good as FM quality" in
1/5 the bandwidth. Technically minded AM'ers should look into this type
of technology as forward going work within the AM community. Boatanchors
still could be the "power-driving" force and the reception tool but each
piece of hardware would require some type of encoder and decoder. If
AM'ers want to continue to march through the 21st century and keep flying
the "progressive" banner, this is a great way to do it. I firmly believe
the FCC will look more fondly at Amateurs who are moving along, and
keeping abreast, of the latest technologies.
Class E has been around for a number of years. While building a Class E
rig shows your technical competency at building, if not really advancing
the state of "AM" or "radio" art.
Pete, wa2cwa
On Thu, 2 Feb 2006 13:24:14 EST [EMAIL PROTECTED] writes:
Has anyone in Boatanchorland documented - by measurement - any of the
HiFi-like audio stations having bandwidth more than say 6,000 or 9,000
wide?
Also...how many of these HiFi stations are there?..are these the E-class
rigs?
Lastly, what other pursuits can these technically inclined AM Hams
subscribe
to in expressing their energies within our hobby?
R,
Steve
WA2TAK
