Napoleonic semaphore was the world’s first telegraph network, carrying messages across 19h-Century France faster than ever before. Now a group of enthusiastic amateurs are reviving the ingenious system.
Before the web, before the computer, before the phone, even before Morse code, there was le systeme Chappe.
Not for the first time or for the last, at the end of the 18th Century France made an important technological advance – only to see it overtaken by newer science.
In this case, it was the world’s first ever system of telegraphy.
According to most accounts, the very word “telegraph” – distance writing, in Greek – was coined to describe Claude Chappe’s nationwide network of semaphore.
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Antenna
90’ MAGNETIC LOOP T3FD TERMINATED FOLDED DIPOLE ANTENNA
T3FD TERMINATED FOLDED DIPOLE AMATEUR RADIO ANTENNA KIT DESIGNED TO WORK AT ONLY 35 FEET ELEVATION FLAT OR AS A SLOPER. BRAND NEW. THIS ANTENNA IS ASS... Read more
Center Loading the Wolf River Silver Bullet 1000
“Wold River Coils has a new accessory for Silver Bullet 500 & 1000 coils called the UAFI or You Asked For It kit. The UAFI is a pair of exte... Read more
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“Big Wire Antennas” [ ARRL The Doctor Will See You Now! ]
“Big Wire Antennas” is the topic of the new (November 21) episode of the ARRL The Doctor is In podcast. Listen…and learn! Sponsored by DX Engine... Read more
Equipment
ATEX PTT Solution Available for ICOM IC-F3202DEX and F4202DEX series of ATEX radios
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RF-KIT Power Amplifiers RF2K-S
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3D printed desktop rack for KX3 / PX3
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Propagation
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Two new sunspot groups appeared this week, on two consecutive days, each lasting for only a day, with a daily sunspot number of 11 and 13 on Friday an... Read more
Digital Modes
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VHF
50MHZ PREAMPLIFIER WITH FM NOTCH FILTER
A 50 – 54 MHz ( 6 meter ) HF preamplifier with innovative design. Input notch filter for FM frequency 88- 108 MHz. Noise figure of 0,5db. Perfec... Read more
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