http://www.classeradio.org/

73 de Jim, N2EY

wrote:
http://www.classeradio.org/

73 de Jim, N2EY

Looks like the answer to emergency responder interoperable radio
communications system.

wrote

http://www.classeradio.org/

Quoted from the site:

"One of the major goals of the class E project is to facilitate the
construction, by Amateurs with only a modest background in construction, of a
high power, good sounding AM transmitter using modern, readily available
components and at a reasonable cost. "

Where was this guy back in 1935 when hams were clamoring for a "good sounding AM
transmitter" project?

73, de Hans, K0HB
--
Homepage:
http://www.home.earthlink.net/~k0hb
Member:
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LVDXA http://www.upstel.net/borken/lvdxa.htm
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K=D8HB wrote:

Quoted from the site:

"One of the major goals of the class E project
is to facilitate the
construction, by Amateurs with only a modest
background in construction, of a
high power, good sounding AM transmitter using
modern, readily available
components and at a reasonable cost. "

Ain't that great?

Where was this guy back in 1935 when hams
were clamoring for a "good sounding AM
transmitter" project?

Probably the same place as you and I, Hans - hadn't even
been born yet.

Some interesting info there. Definitely not run-of-the-mill Ikensu
stuff!

Do you consider those projects to be "tinkering"?

73 de Jim, N2EY

wrote

Ain't that great?

Yes and No.

Yes because the project encourages and nurtures the spirit of experimentation in
something "different". Class E isn't your uncles old technology.

No because the project emphasizes AM, an old spectrum-hog mode which ought to
have been retired about 1965.

73, de Hans, K0HB

On Thu, 22 Sep 2005 14:50:18 GMT, "KØHB"
wrote in . net:


No because the project emphasizes AM, an old spectrum-hog mode which ought to
have been retired about 1965.


I don't hear too many pileups these days......







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K=D8HB wrote:
wrote

Ain't that great?

Yes and No.

Yes because the project encourages and nurtures the spirit of
experimentation in
something "different". Class E isn't your uncles old
technology.

I agree 100%. And it's not just Class E - there's the Class H
modulator...

No because the project emphasizes AM, an old spectrum-hog mode which ou=
ght to have been retired about 1965.

Why? AM is a legal mode, with advantages and disadvantages.

One of the key elements of the spirit of experimentation in
something "different" is not being constrained by what is
considered electropolitically correct.

Besides, the Class E technology can be adapted to a variety of modes.

73 de Jim, N2EY

wrote

No because the project emphasizes AM, an old spectrum-hog mode
which ought to have been retired about 1965.

Why? AM is a legal mode, with advantages and disadvantages.

AM is a relic, inefficient in it's use of spectrum, and inefficient in it's use
of power (only half of the transmitted power contains intelligence and half of
that half is discarded at the receiver!).

One of the key elements of the spirit of experimentation in
something "different" is not being constrained by what is
considered electropolitically correct.

I don't know WTF the phrase "electropolitically correct" is even supposed to
mean.

Besides, the Class E technology can be adapted to
a variety of modes.

Yes, it certainly can. Which makes it all the more puzzling that they'd
showcase it with a doddering old mode like AM. Class E is technologically
interesting, and kind of "electro-sexy". Showcasing it in an "AM suit" is
equivalent to showcasing Jessica Simpson in a fully secured HAZMAT suit.

Incidentally, the technology is a little older than Jessica. See "Class-E, A
New Class of High-Efficiency Tuned, Single-Ended Switching Power Amplifiers",
IEEE Journal of Solid State Circuits, Vol SC-10, June 1975, pp. 168-175.

Beep beep
de Hans, K0HB

KØHB wrote:
wrote


Ain't that great?


Yes and No.

Yes because the project encourages and nurtures the spirit of experimentation in
something "different". Class E isn't your uncles old technology.

No because the project emphasizes AM, an old spectrum-hog mode which ought to
have been retired about 1965.


Next thing ya know, someone will be building dipoles with ladder line!
;^). Then (shudder) things with tubes!!!!

Room for Morse CW, room for A.M. IMO.

- Mike KB3EIA -

Mike Coslo wrote:

Next thing ya know, someone will be building
dipoles with ladder line!

Been there...

;^). Then (shudder) things with tubes!!!!

You mean "hollow-state"? Oh yes, a good technology. Old, but with many
advantages.

Room for Morse CW, room for A.M. IMO.

And PSK31, SSB, RTTY, SSTV, etc.

Speaking of "room"....

One thing about amateur HF/MF AM operation that seems to
be quite different is the "old buzzard roundtable" type of QSO.

What happens in such a QSO is that several stations are on the same
frequency, transmitting in a round-robin sort of sequence. A
transmission may be 5, 10 or more minutes long. Each op gets to do a
serious monologue on whatever subject interests them. What makes the
difference is the ability of the speaker to be interesting to the
audience, and communicate verbally in a way
that is enjoyable. It's a developed skill, and some AMers are really
really good at it.

Yes, it could be done on SSB, but it's not as common.

If a bunch of hams are all using the same frequency, rather than being
spread out all over the band, isn't that spectrum efficiency?

Another good thing about AM is the publicity factor. Ask hams who were
licensed before about 1965 or so how they found out about ham radio,
and a high percentage will tell you they started out with some sort of
"shortwave" receiver, and came across some hams using AM. Listening to
the conversations got them hooked.

When SSB became the dominant amateur HF/MF voice mode, that method of
recruitment dried up.

73 de Jim, N2EY