[NJARC] The TELIMCO Wireless Telegraph - more

[oldradio at comcast.net]

Attached catalog pages

----- Original Message -----
From: "Marv Beeferman via NJARC" <njarc at mailman.qth.net>
To: "NJARC" <njarc at mailman.qth.net>
Sent: Tuesday, March 22, 2016 2:42:15 PM
Subject: [NJARC] The TELIMCO Wireless Telegraph

Just remember
Reply = Poster
Reply All = Everyone

_________________________________________________________

Regarding "find the radio ad:" 

In the March 1956 Radio-Electronics, Gernsback wrote a two-page retrospect of his TELIMCO Wireless Telegraph Outfit. Some interesting points: 

1. The Scientific American advertisement was the first home "radio set" advertisement to appear in print anywhere and the TELIMCO "was the first home radio sold to the public anywhere in the world." 
2. Range was between 300 to 500 feet without a ground. "By using an elevated aerial 50 to 100 feet in length and by grounding one side of both transmitter and receiver to a water or gas pipe, the range was easily increased to one mile." 
3. The transmitter used an untuned circuit which would be eventually outlawed by the 1912 Radio Act. Since the receiver was also untuned, it would pick up signals from any and all transmitting stations that were nearby. However, the set provided young experimenters with an economical opportunity to send and receive radio signals and to learn code. 
4. Replicas of the original transmitter and receiver were donated by Gernsback to the Ford Museum in Dearborn in 1956. Wonder if any originals survived? 
5. A replica for the museum wouldn't be hard to come up with...a spark coil, 75 ohm relay, bell (decoherer), replica coherer, spark gap, key and battery are the major components. 

Marv 

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