Paul Litwinovich

WSHU Chief Engineer, author of Vintage Radio series

Paul caught the radio bug as a child. By age 12, he had taught himself the basics of vacuum tube theory.  He began repairing old, discarded radio sets, the kind that we now call vintage sets.  He loved listening, too, to local programs, DJs who picked their own music, talk shows designed to inform, not shock the listener.  But his favorite listening was to short wave radio, with its magic of music and programming from all around the world.

Hobby led to career.  Paul was a design engineer and engineering manager in the broadcast industry  for 14 years before coming to WSHU in 1990.  He holds an FCC commercial radio license, and an extra class Amateur radio license. And, oh yes, he's still restoring and collecting vintage radio sets, for more than 45 years now, and counting.  

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Vintage Radio
12:06 pm
Fri October 17, 2014

Radio prepares for war, part 2

A BC-348 military aircraft receiver as used on the B-17 bomber.
Credit P. Litwinovich collection

Last month, in part one of Radio Prepares for War we looked at the National HRO receiver, which set the bar for the standards required by military radio communications.  The HRO was a superb receiver for land or ship based use, but it was too large and heavy for use in aircraft. It also would have been difficult to redesign it for use on 28 volt aircraft power systems. The HRO also was relatively difficult to operate in a fast paced combat environment. It required changing coil packs to change from one group of frequencies to another.

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Vintage Radio
12:14 pm
Mon September 8, 2014

Radio Prepares for War, Part 1

1935 National HRO U.S. Navy Receiver.
Credit P. Litwinovich collection

As the roaring twenties came to a close, radio technology would continue to evolve with significant improvements to consumer sets, particularly in the area of shortwave reception. Read my past articles for more details as to how this transpired. The price of radios would continue to fall as availability continued to increase. Herbert Hoover could have added "a radio in every home" to his famous "a chicken in every pot and a car in every garage" campaign slogan. This radio boom would continue right up until December of 1941, when the first bombs were dropped on Pearl Harbor.

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Vintage Radio
11:21 am
Thu August 14, 2014

Breaking News, 1937: Hindenburg burns

German airship Hindenburg burning at Lakehurst Naval Station, NJ, May 6, 1937
Credit Library of Congress, collection contributed by Murray Becker

The Hindenburg disaster was not the first time that radio influenced the way or the speed by which news was delivered to the masses, nor was it the first major event  to be given live coverage. To look at radio’s influence on news delivery of breaking events, we need to go back to the Titanic disaster.  Although the Titanic’s  plea for help was monitored only by other ships, a small handful of commercial shore stations, and perhaps a few early amateur operators, it did mark a turning point in media communications. Newspapers featured the story on their front pages and in special editions the following morning. Were it not for wireless communications, the story probably would not have reached the newspapers for several days. Other events marked the coverage of news live as it happened. KDKA, the nation’s first licensed broadcaster, went on the air with the coverage of the Harding/ Cox presidential election in 1920.

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Vintage Radio
1:53 pm
Thu July 10, 2014

A Radio for the Great Depression, Part II

1931 Philco Model 70 in a cathedral cabinet
Credit P. Litwinovich collection

Last month we looked at radio at the start of the Great Depression and how RCA’s President David Sarnoff made the decision to license the heterodyne circuit to any manufacturer willing to pay royalties to use it. The heterodyne circuit, combined with the new developments in vacuum tube technology, allowed manufacturers to build affordable radios that performed far better than most of the high end sets from just a few years prior.

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Ducting
2:20 pm
Mon June 30, 2014

WSHU signal interference

As the weather warms and humidity rises, you may experience problems tuning in some of the WSHU Public Radio Group’s frequencies.  This is due to a phenomenon called ducting.  Ducting occurs when radio waves are trapped below or between layers of the atmosphere having different air temperatures. It is the same phenomenon which can hold layers of smog or humidity close to the earth. It often occurs when there is a sudden weather change such as the arrival of a cold front, or it can be the result of a stagnant hot air mass.

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