[NJARC] Double-Conversion Stewart Warner

[Philip Harris]

March 1941 is the date that the FCC set up the then "expanded band" from
1500 to 1600 kHz.  Not to be confused by the recent expanded band to
1700 kHz.  (See below chart.)

This was also when the commission moved some stations up to 30 or 40 kHz
from their original assignments, setting up the band as we know it
today.  More recently,y around 1980, in ITU Region II, there was a move
afoot to bring North and So. America into 9 kHz spacing which is what
the rest of the world uses.  This was killed, but it actually was a good
idea.

Excerpt from this web site:

http://www.oldradio.com/current/bc_am.htm

  a.. The Standard Broadcast Band began in 1921 with just one frequency
(833 kHz).
  b.. In December 1921, 619 kHz was added for Weather and Market
reports.
  c.. In September 1922, 750 kHz was added as a new "Entertainment"
frequency.
  d.. On May 15, 1923, the Standard Broadcast Band was expanded to
550-1360 kHz using 10 kHz steps.
  e.. In April 1925, this was further expanded to 550-1500 kHz.
  f.. November 11, 1928 saw the first big "realignment" as the FRC
shifted many stations, and deleted others, in an attempt to reduce
interference.
  g.. On March 29, 1941, the band was extended to 550-1600 kHz. On this
date, the NARBA frequency shift changed many stations spot on the dial.
  h.. In the early 1950s, the band was extended to 540-1600 kHz. The
first 540s appeared in 1954 or 1955.
  i.. In 1995, the FCC again extended the Standard Broadcast Band to
540-1700 kHz.
          WJDM, 1660, Elizabeth NJ, was the first U. S. regular
broadcast station to operate in
          the expanded band, using 10 kW day, 1 kW night.

Best, Phil


----- Original Message -----
From: "Michael Koste" <michael.koste@zurichna.com>
To: <njarc@mailman.qth.net>
Sent: Wednesday, February 26, 2003 12:21 PM
Subject: Re: [NJARC] Double-Conversion Stewart Warner


>
> Anybody know what year the FRC/FCC opened up the high end of the band
for
> "experimental hifi" broadcasts? Seems to me,  WQEW in New York (now
radio
> disney) was one of the earliest occupants.
>
>
>
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