Western Union’s Microwave Telegraphy Network

Western Union was one of the first to use radar-wavelength waves for telecommunication. From David Rotenstein’s blog:

In March 1945 the Federal Communications Commission (FCC) authorized the Western Union Telegraph Company to place into service an experimental microwave relay system between New York, New York and Philadelphia, Pennsylvania. The system to beam telegrams between stations used radio frequencies that had previously only been used by military radar systems.

The experimental system that used unattended stations placed at regular intervals to facility a line-of-sight radio relay allowed Western Union to refine the radio beam telegraphy process by improving its equipment to maintain constant signal strength. The equipment used in Western Union’s experiments was made by the Radio Corporation of America (RCA) under license to Western Union. The company’s goal was to develop a system that increased the capacity for sending telegraphs, to eliminate much of the company’s wireline reliance (i.e., make poles and wires obsolete) and to position it for providing transmission services for emerging television technology.

Western Union designed its system by incorporating two facility types: terminals and relay stations. In March 1945 the FCC authorized the Western Union to place into service an experimental microwave relay system between New York, New York and Philadelphia, Pennsylvania. This network linking New York and Philadelphia included terminals in Philadelphia and at the company’s New York City headquarters. Relays were planned at Bordentown, Ten Mile Run, and Woodbridge, New Jersey. The New York-Washington-Pittsburgh network incorporated the New York headquarters, a rooftop location in downtown Pittsburgh, and a new tower building for the Washington, D.C., terminal. Each terminal was connected by nodes in the network: unattended relay stations with towers and equipment buildings.

More here.

Neat!


Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.

Join 30,000+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Follow Adafruit on Instagram for top secret new products, behinds the scenes and more https://www.instagram.com/adafruit/

CircuitPython – The easiest way to program microcontrollers – CircuitPython.org


Maker Business — Pololu’s account of the chip shortage

Wearables — Getting overly ambitious with EL wire

Electronics — Invisible Bugs

Python for Microcontrollers — Python on Microcontrollers Newsletter: MicroPython SAMD Support, ESP32-S3 Feather and much more! #Python #Adafruit #CircuitPython @micropython @ThePSF

Adafruit IoT Monthly — Energy Harvesting Sensor Nodes, Tracking a Turtle, , and more!

Microsoft MakeCode — MakeCode Thank You!

EYE on NPI — Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey

New Products – Adafruit Industries – Makers, hackers, artists, designers and engineers! — New Prods 11/17/21 feat. Adafruit KB2040 – RP2040 Kee Boar Driver!

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !



No Comments

No comments yet.

Sorry, the comment form is closed at this time.