All About FM This week we have a couple of documents from the early 1940’s explaining FM. At this time FM was very, very new. It had the benefit of reducing the noise one would hear on AM. A lot of work went into convincing the world that FM was the way of the future. 1941-All about FM (3 MB)1941-GE FM Primer (4 MB) AM Broadcast Transmitters Some classic (and one BIG) broadcast transmitters. Raytheon RA-250 Popular with 250 watt Read more…
Author: K9EQ
Allied Radio Catalogs PDF of the 1969 Allied Radio Catalog (50 MB) Radio Shack Catalogs So what exactly is a Meissner Signal Shifter? What did it cost? How about a 2 and one half meter transceiver? And where could you buy one in 1946? Guess what? Radio Shack. THEY SOLD RADIOS! And they had a radio shack.Radio Shack Catalog 1939 (6 MB)Radio Shack Catalog 1946 (11 MB) 1986 Radio Shack (20 MB) Lafayette 1968 Lafayette Radio Electronics (16 MB) Heathkit Read more…
Yaesu does not provide a mechanism that allows the WiRES-X software to be controlled by another program, i.e., having another program switch to a certain Room when a net starts. Windows does, however, permit another program to send events to a program. Each window, menu item, and dialog in a Windows program has a unique identifier. It is possible to use these identifiers to send “message” to the WiRES-X software. The WiRES-X Automation Project’s purpose is to bring together people Read more…
This program uses a DV4mini to monitor over-the-air Fusion signals and display the meta data (does not display voice, pictures, messages, etc.) This version of the program will output a record when a station keys up and then another record when the station unkeys. I’ve done this so that the user doesn’t get overwhelmed with all of the meta data that is produced. You’ll need to review the Yaesu Digital Communication Standards document to understand what the different fields mean. Read more…
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