If in 1915 were no broadcast stations to speak tell us what was with the
first station to speak and when it start transmitting.
S*

The first AM Broadcast station (as opposed to amateur or military ) was
in about 1919.

Jeff

KCBS, San Francisco, claims to be the direct lineal descendant of
Charles Herrold's broadcasting, which dates from 1910. However,
Herrold's early work involved broadcasting to amateurs, by his own
admission. http://www.charlesherrold.org/KCBS.html, et al.

KCBS and KDKA, Pittsburgh, have been trading claims and counterclaims
for decades. KDKA went on the air in November, 1920 and supporters of
their claim of "First!" say KCBS doesn't date from the Herrold days,
but rather from 1921, when they got their earliest commercial license,
as KQW. I don't claim to be able to settle it here. Oy!

"Sal"

A year earlier PCGG in Holland started broadcasting on November 6, 1919
and is thought to be the first 'real' broadcast station.

On 15th June 1920 Marconi made their first broadcast to the public from
their works in Chelmsford, but it took until 1921 before there were
regular programmes.

Jeff