Today I visited the
Pavek Museum of Broadcasting in St. Louis Park, MN near Minneapolis. This is a great place for anyone interested in the history of radio and TV. Their collection starts with spark generators (as used on the Titanic), then moves on to early tube radios with many varieties on display.
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Early Tube Radios | | |
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I was fascinated by the first tape recorder in the US, The Magnetophon K4, imported from Germany immediately after WWII by a signal Corp guy, Jack Mullin.
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The Magnetophone K4 |
At that time Bing Crosby had a radio show, the Craft Music Hall, but did not like the inflexibility imposed by performing live, and the sponsors and audience did not like the poor quality of wire or disk recordings. Crosby's technical producer decided to try the K4 which solved the problem. Because there were only 2 of these machines in the US, Mullin encouraged Ampex to develop a machine and the first Ampex 200 recorders went into use in 1948.
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The Ampex 200 used by Bing Crosby's Radio Show |
Right after I got out of the Navy, I assembled four DynaKits: an FM tuner, preamplifier, power amplifier, and a switching unit. To my delight I found these four units in the museum's collection.
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Dynakits like the ones I built |
The last item I'll talk about is the Theremin, a musical instrument played by moving your hands near two antennas. One controlled the volume and the other the pitch of the note being played. The museum has a working original RCA theremin that I was allowed to try to play and I learned it is not easy to do.
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1929 RCA Theremin |
If you are ever in the Minneapolis area with some time to spare, check out this place!