Did Marconi Really Hear the Letter 'S' Across the Atlantic ?
It was on Thursday December 12 in the
year 1901, that Marconi claimed to have successfully received a wireless
transmission from Poldhu in Cornwall at his temporary listening location near
St. John’s on the North American island of Newfoundland.
It
is stated that the radiating equipment at Poldhu was a 75 kW spark transmitter,
which was operating somewhere in what we would today call the longwave or maybe
the mediumwave band. The signal was fed
into a temporary vertical fan antenna system.
The
receiving equipment at the old hospital building near Cabot Tower on Signal
Hill St. John’s Newfoundland, was a longwire antenna held aloft by a balloon or
a kite, a simple untuned coherer detector, and a set of headphones. It is suggested that the transmitter was
radiating on several harmonic frequencies in addition to the emission on the
fundamental frequency, and it is quite probable that the receiver was also
receiving some of the untuned harmonics as well as the fundamental.
That
event is dated exactly 111 years ago tomorrow, Monday December 12, 2012. However, all throughout these many years, it
has been quite popular to deny the veracity of the event, and to declare that
Marconi & his assistant George Kemp did not actually hear the letter S transmitted
across the Atlantic from England, but instead, they simply heard the crash of
static produced by strong winter storms.
It
is true, in the headphones, the actual sound of static and the sound of a spark
from a distant wireless transmitter were quite the same in that era. However, there is a real difference between
the irregular sounds created by lightning and the regular rhythmic sound of a
continuous stream of the letter S, three dots, in Morse Code.
We
should remember also, that both Marconi & Kemp listed in their diaries the
times & the dates when they state that they heard the letter S from
England. The Marconi diary shows that he
heard the signal from Poldhu on 14 separate occasions during the Thursday &
Friday; and the Kemp diary shows that he heard the signal on 11 separate occasions,
a total of 25 times altogether.
In
addition, it is known that lower frequency radio transmissions in the middle of
winter at a low sunspot count can cover quite long distances, as is revealed
also in observed mediumwave coverage during similar conditions in Australia
& New Zealand.
However,
in the middle of last year, an interesting original postcard was offered on
eBay, and the message on this postcard tends to confirm the fact that it was
believed in Newfoundland at the time that Marconi did indeed achieve what he
said he achieved.
The
message was written in black ink onto a 2d (two penny) Newfoundland postal card
with the printed postage stamp in orange showing a portrait of Queen
Victoria. The message was written on
January 15, 1902, just a little over a month after Marconi’s stated reception
of the wireless signal from England. The
card was addressed to Mr. William Codner at 18 Wickford Street, St John’s,
though the sender did not give his own name nor complete address.
This
card was posted at Broad Cove NS, indicating North Shore to distinguish it from
another place with a similar name, and it was carried by the old Conception Bay
Railway. Three postal cancellation dates
show January 18 & 20, 1902. The
message on the card reads as follows:
Dear Sir,
You
will please tell your friend the adjutant who is (at) St Johns that a mistake
was made in referance of date of first message wireless telegraphy received
in Newfoundland. For factule
information, please mention right date first
message across the Atlantic was received from Lizard Point in Cornwall at
11:20 am Wednesday the 11th November 1901. (Two illegible initials)
2. He also spells the word “factual”
incorrectly, as “factule”.
3. There were 2 Marconi wireless
stations located on the southern coast of Cornwall, 6 miles apart. The
station at Lizard was subsidiary to Poldhu.
The Poldhu station was the one that Morsed the letter S to Newfoundland, not the Lizard station.
4. The 11th of November in
the year 1901 was not a Wednesday, instead it was a Monday.
5. It is true, that Poldhu did send the
letter S to Newfoundland on Wednesday the 11th of December, but the Marconi/Kemp diaries and subsequent news
reports indicate that the signals on the 1st day were not received reliably at St.
John’s. The 1st verified
reception, it is stated, was on the next day,
Thursday, December 12, 1901.
Why
did the unidentified writer write to Mr William Codner? Was Codner the editor, or maybe the reporter,
for the local newspaper in St John’s?
Who was the Adjutant? Was he
interviewed about these Marconi events by the local newspaper?
I
guess we will never know, but the postcard, with all of its mistakes, does
throw light onto the fact that at least one Newfoundlander at the time believed
that Marconi did indeed receive the letter S across the Atlantic on that
memorable occasion. Maybe the radio
historians should be arguing as to which day should be listed as the 1st
day of reception (Wednesday December 11, 1901 or Thursday December 12, 1901),
rather than questioning as to whether a signal was heard at all.
(AWR/Wavescan/NWS 198 via Adrian Peterson)(photo/Daily Dope.Net)