U.S. Television Projection TV
Year: 1947 | Deflection: Magnetic |
Production: | Focus: Electrostatic |
Original Price: $1,995.00 | HV Type: RF Oscillator |
Tube Count: 33 | CRT: 5TP4 |
The United States Television Company produced a number of televisions between 1947 and 1949, mostly projection sets for businesses and to a lesser degree homes. This is the model T-525, which was used in bars and clubs. It is a projection TV with a AM-FM-SW radio, and also has input for a phonograph. Original price for this set was $1,995.00 in 1947.
See Article from Newsweek, 1947
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Front viewDeflection chassis on left, low voltage power supply lower center, high voltage power supply on lower right (safety cover removed), projection chassis upper center. |
Rear view
RF/IF chassis upper center
Projection chassis lower center. |
The low voltage power supply. |
The high voltage power supply with protective cover removed. This is an RF oscillator style high voltage tripler, using parallel 6Y6's and 3 1B3 HV rectifiers, developing about 22KV |
The deflection chassis. The small add-on chassis is the phase lock horizontal oscillator circuit. This set was probably designed pre-war, when it went into production in 1947 the PLL circuit was added. |
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This set uses the 5TP4 projection CRT. The projection system consists of an f1.9 B&L lens system projecting on to a front surface mirror, then to the glass screen. Even with 30KV on the tube the brightness is not as good as the sets using a Schmidt projection system.
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The TV receiver and radio are contained on one chassis. It tunes the modern FM band, AM broadcast, and two SW bands.
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The tuner chassis has the look of a pre-war design. It appears the front end was modified before production, three miniature tubes are used here, the rest are all metal octal. |