RadioBanter - View Single Post - What makes a Pro code test Amateur a Troglodyte?

October 14th 03, 07:10 PM

In article ,
(Hans K0HB) writes:

(Len Over 21) wrote

On-off keying was
adopted simply because it was the ONLY WAY POSSIBLE for
early, primitive radio to allow communications. It's just
practical applied physics. Nothing else.

Oh ****, you got it wrong again!

In Boston, on Christmas Eve of 1906, modulating a spark transmitter,
Reginald Fessenden made a holiday broadcast of a short spoken
introduction, some recorded Christmas music, and played "Oh Holy
Night" on a violin.

Obviously on-off keying was not the ONLY WAY POSSIBLE (your emphasis)
for early ("spark") radio to allow communications.

"Dear Mother Anderson, your son Leonard is failing in practical
applied physics. Perhaps he would benefit from a stint in the Army to
learn a useful trade."

Sunuvagun! Good luck on this one now.

Dear Mother Brakob,

Your offspring is once again confused, perhaps suffering from
dittybopper dementia from spending too much time listening to
beeping or seminarian studies of official documents from Newington.

The following is a direct quote from the Special Commemorative
Issue of McGraw-Hill's "Electronics" magazine of April 17, 1980,
page 75, right-hand column, section titled "History before 1930."
That issue is 650 pages total, was printed in celebration of 50 years
of "Electronics" magazine existance.

"The broadcast television that followed two decades later, would,
of course, not have been possible without proper transmitters,
receivers, modulators, demodulars, etc. --or, in other words,
without proper radio. The world had been introduced in the potential
of such a radio system as far back as 1906, when on Christmas
Eve Prof. Reginal A. Fesenden of Harvard University made the first
documented radio broadcast of speech and music. For this feat, he
used a 50-KHz Alexanderson alternator, manufactured by the
General Electric Co. Telegraph operators on ships crossing the
North Atlantic were surprised on the historic night to hear music
coming out of earphones that previously had emitted nothing but
dots and dashes. Fessenden modulated the alternator's 1-KW
output simply by putting a microphone in series with the antenna of
his experimental station at Brant Rock, Mass. It is likely, but not
certain, that the microphone was water-cooled."

Mother Brakob, please point out, highlight if necessary with a yellow
marker pen, that the transmitter was an ALTERNATOR, not the
damped-wave "spark" type your son scribbled in angry crayon.
Specifically, an ALEXANDERSON ALTERNATOR. ONE
KILOWATT output.

You may wish to give your son a primer on electricity explaining
power losses in resistive conductors. That is important considering
the microphone used by Fessenden was IN SERIES WITH THE
ANTENNA CARRYING CURRENT SUFFICIENT FOR ONE
KILOWATT RADIO FREQUENCY POWER OUTPUT.

Best of good luck on that one, Mother Brakob. [you are going to
need it]

LHA

PS: You may wish to contact ARRL psychiatric services privately
for a list of competent mental health professionals in your area who
are specialists in the dementia of dittybopper data distortion attempted
on historical facts gathered by professional publishers.