Stages were transformer coupled, with tuned transformers for the intermediate frequency amplifiers and a miniature audio transformer for the loudspeaker. All amplifier stages used common emitter amplifiers. After detection, a single-transistor stage amplified the sound frequency. It contained a single transistor converter stage, followed by two intermediate-frequency amplifier stages. The TR-1 was a superheterodyne receiver made with four n-p-n transistors and one diode. The red triangles on the frequency dial mark the CONELRAD frequencies of 6 kHz. It came in a cardboard box with the color stamped on the end. It was advertised as being 3" x 5" x 1.25" and weighed 12 ounces including the 22.5 volt battery. Other later, rare colors included lavender, pearl white, turquoise, pink, and lime. It was later uncommonly offered in olive green and mahogany. The TR-1 was initially offered in black, bone white, mandarin red, and cloud gray. The design won an award from the Industrial Design Society of New York and was selected by the Museum of Modern Art for the American Art and Design Exhibition in Paris in 1955. The design was created within six weeks by way of telephone and design sketches exchanged by mail. outsourced the TR-1 exterior design to the industrial design firm of Painter, Teague and Petertil. A review in Consumer Reports mentions the high level of noise and instability on certain radio frequencies, recommending against the purchase. While the radio was praised for novelty and small size, the sensitivity and sound quality were behind the tube-based competitors. Such battery consumption rate still made the TR-1 rather expensive to run.
#REGENCY TR 1 TRANSISTOR RADIO PORTABLE#
The current drain from this battery was only 4 mA, allowing 20 to 30 hours of operation, in comparison to only several hours for the portable receivers based on vacuum tubes. A 22.5 volt battery provided power, since the only way to get adequate radio frequency performance out of early transistors was to run them close to their collector-to-emitter breakdown voltage. The TR-1 used Texas Instruments' NPN transistors, hand-picked in sets of four. The initial TR-1 retail price was $49.95 (roughly $443 in year-2016 dollars) and it sold about 150,000 units. Though this severely reduced the audio output volume, it let I.D.E.A. The Regency TR-1 circuitry was refined from the Texas Instruments prototype, reducing the number of parts, including two expensive transistors. Koch, US 2892931, former Project Engineer of I.D.E.A. The Regency TR-1 is patented by Richard C. The look and size of the TR-1 were well received, but reviews of its performance were typically adverse. One year after the TR-1 release, sales approached 100,000 units. It was the first practical transistor radio made in significant numbers. at the time, Ed Tudor, jumped at the opportunity to manufacture the TR-1, predicting sales of the transistor radios would be "20 million radios in three years." The Regency Division of I.D.E.A announced the TR-1 on October 18, 1954, and put it on sale in November 1954.
No major radio maker, including RCA, Philco, and Emerson, was interested. In May 1954, Texas Instruments had designed and built a prototype transistor radio and was looking for an established radio manufacturer to develop and market a radio using their transistors. The two companies worked together on the TR-1 to grow revenues for their respective companies by pioneering this new product area. Previously, Texas Instruments produced instrumentation for the oil industry and locating devices for the U.S. 6-1/2"W x 4"H x 2"D.Two companies-Texas Instruments of Dallas, Texas, and Industrial Development Engineering Associates (I.D.E.A.) of Indianapolis, Indiana-worked together to produce the Regency TR-1. The correct large 9 volt battery is not made anymore, but today's smaller 9 volt batteries work just fine. The radio pulled stations (softly) when 9 volts were applied to it.
The logo, dial and volume knob are nice and complete. Even the back hinged area and tabs are nice. The exterior is made of genuine top grain cowhide and is in very good preserved condition. It was released shortly after the introduction of the famous TR-1, the world's first transistor radio. This five-transistor radio was originally sold for $54.95 in 1956 and is a true piece of transistor radio history. This is the first Regency transistor radio to be offered for sale on the Radio Attic in at least six years. I am pleased to offer this rare Regency leather portable transistor radio.
0 kommentar(er)
