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Messages - WIRELESS

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British Bikes / Re: Can you identify this Bike?
« on: March 17, 2020, 02:19:53 PM »
Here is the description of the Indian Military wireless station I told you about above.

This looks like it could be a Big Twin about 1915 time frame. The US Army used these through out the war time. Unfortunately the State side dealers took it in the shorts and only the government got the bikes. Many dealers went under or changed to other motorcycles because they couldn't get any for civilian sales. This was a 60.88 cubic inch motor generating about 15 to 18 horsepower. Atop the gas tank is the metal tool box and it had an option to mount two switches to control the lights and horn. The throttle is the left hand grip and the spark advance is the right hand grip. The kick starter is on the right side and in this picture it is folded down so that you can kick start the motor. The side car frame looks like the one used by Indian and the configuration of the car was left up to the Army. The price for the sidecar at the time was $70.00! Some Indian side cars sported machine guns during WWI. This is information from the book "The Iron Redskin."


If you look closely at the unit on the far left in the sidecar, you will see that the radio outfit is one of the first wireless telephone transmitters, invented and developed by Lee DeForest, the inventor of the triode vacuum tube- you can see the earliest example of the first radio tube (Valve) on the market, mounted on the detector box on the sidecar. He placed the first voice transmitters on the market.

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British Bikes / Re: Can you identify this Bike?
« on: March 17, 2020, 02:09:13 PM »
Thank you all very much for your input--

Mini-me, thanks for your license tag info, does the number indicate that this would have been the 1826th motorcycle registered in the Nottingham district?
What year did the govenment begin issuing license tags for motorcycles?

R - Great info & research in order to find an original illustration depicting the correct bike! As to the power requirements for the transmitter, I think that the cables that disappear to the left of the bike indicate where the power source (most likely storage batteries) was located... was it another bike so that the power plant was mobile? I guess we will never know. I presume this was the apparatus of a an early radio amateur operator (Ham radio) and since this was so early in the development of the art, he "rolled his own" (Homebrew) the power source, antenna and receiver of the installation. The Marconi spark coil & gap would have weighed about 100 lbs, so this bike must have been a bear to handle on the rough roads of the day! This spark coil is mounted on the rear fender and the mounting bracket was built by the radio operator. A Morse Telegraph Spark key may have been mounted out of sight on the handlebars, and the crystal receiver is also not shown in the image. I don't recognize any military apparatus or badges, which indicates this was just a private citizen pushing the envelope on mobile wireless... think 1912 Cell Phone...

Cardan--- Thank you so much for confirming that it is indeed a Campion and providing exact details on the engine & running gear. It is an interesting explanation of the Roc gear assembly.

And Rex --- you are absolutely correct, I never thought I would acquire this much info & details on such an obscure bike in such a short amount of time.
This website is full of knowledgeable people who are not afraid to share their knowledge they have gained thru the years!


If anyone discovers an earlier application of a wireless set on a motorcycle, please contact me with the details, as this is a very important subject in our field. I will be sharing this website entry with the Curator of Science and Technology at the Science Museum in London, who is a personal friend.


I am running an image in our quarterly Journal and this information will help me to correctly identify the model & vintage of the Campion. This photo represents the cutting edge technology of mobile radio before WWI !!!


***** A few years ago I discovered another glass side that depicted an American motorcycle with a wireless outfit built into the sidecar & I was able to post a question on the Indian forum and they helped me out just like you fellows did!  I will post details and a couple of photos in a few minutes, hoping that some of you might enjoy seeing what a complete DeForest Wireless station (He invented the triode vacuum tube) looked like on an American Indian in 1917.

Thank you again for all your help!
73 Jim

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British Bikes / Can you identify this Bike?
« on: March 16, 2020, 06:51:06 PM »
Hi, I am the Librarian and a Curator at the Antique Wireless Association in Bloomfield, New York USA.

We have come across an early glass image of a vintage British (?) motorcycle that I have been unable to identify.

It is unique in that it appears to be a non-military bike that has been utilized as an early mobile wireless station.

The transmitter looks to be a Marconi 10" spark coil & gap and would probably date from before 1917.

Can anyone identify the bike's manufacturer and approximate build date? Does the license plate indicate a location or date?

Has anyone ever seen an earlier image of a wireless installation on a motorcycle?

My first bike was a 125 Benelli in 1966, so we do love motorcycles! :) :)

Thank you in advance for any help you could provide.

73, Jim N2GHD

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