[GreenKeys] SAQ VLF using 5-bit tape

Duncan Brown duncanancy at earthlink.net
Fri Dec 24 11:32:48 EST 2021


The annual transmission from SAQ on the 17.2 Kc Alexanderson Alternator 
was done this morning. You can watch  the startup and transmission on 
YouTube: https://www.youtube.com/watch?v=Ecg2UrKvNr8

Alexanderson Alternators operating on around 17 Kc with an antennas 2.5 
Km long was the standard for commercial long distance transmissions; 
until hams showed you could do it with 5 tubes and a 100ft antenna, 100 
years ago this month.

Note that the Morse "wheel" to send the "VVV DE SAQ" was actually done 
from a five bit teletypewriter tape. The machine then converted it into 
Morse to key the transmitter.  Many radio stations would receive news 
and telegrams by teletypewriter, but transmit them by Morse. So there 
were mechanical machines to do the translations, in both directions.


73 &Seasons greetings.

Duncan
K2OEQ
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