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News Briefs
August 1962 Radio-Electronics

August 1962 Radio-Electronics

August 1962 Radio-Electronics Cover - RF Cafe[Table of Contents]

Wax nostalgic about and learn from the history of early electronics. See articles from Radio-Electronics, published 1930-1988. All copyrights hereby acknowledged.

Loewe 3NF integrated circuit vacuum tube - RF CafeThe August 1962 "News Briefs" column in Radio-Electronics magazine contained a few notable events. Siegmund Loewe, who was one of the first people to create integrated circuits within a single vacuum tube (Loewe 3NF), passed away. The 3NF contained three triode assemblies, two capacitors and four resistors, configured to enable a complete radio receiver in a single tube. It must have been expensive because his company offered to repair failed internal components (for a fee, I suppose). Ford Motors announced an experimental collision avoidance radar with a 500-foot range for cars. The U.S. Congress, in its ever-expanding regulation manner, decreed that all future TVs must be manufactured with a full 82-channel (VHF and UHF) capability. Japanese electronics production increased roughly 20% in value in 1961, as over 1960. There's more.

News Briefs: 11/57 | 8/58 | 11/59 | 2/60 | 4/60 | 8/60 | 9/60 | 10/60 | 12/60 | 1/61 | 3/61 | 5/61 | 6/61 | 7/61 | 8/61 | 9/61 | 10/61 | 11/61 | 12/61 | 1/62 | 2/62 | 3/62 | 4/62 | 5/62 | 7/62 | 8/62 | 9/62 | 10/62 | 11/62 | 3/63 | 4/63 | 6/63 | 8/63 | 9/63 | 11/63 | 2/64 | 3/64 | 7/64 | 8/64 | 12/64 | 8/64 | 9/64 | 1/66 | 3/66 | 8/66 | 9/66 | 1/67 | 3/67 | 4/67 | 5/67 | 6/67 | 7/67 | 9/67 | 3/68 | 4/68 | 5/68 | 8/68 | 9/68 | 1/69 | 11/69

News Briefs

Coherent Light Receiver Announced by Philco - RF CafeCoherent Light Receiver Announced by Philco Lansdale

Engineers at Philco's Lansdale Div. have introduced a solid-state photo mixer diode that can demodulate laser outputs. The new device, L-4500, is a silicon planar epitaxial diode that detects the difference frequency between two closely spaced optical laser frequencies. The mixing principle is the same as that of the radio superheterodyne, where the difference between two radio frequency signals is detected. Unlike the conventional crystal, the photomixer need not respond electrically to either a signal or a local oscillator frequency. It merely detects the difference frequency. The L-4500 provides high quantum efficiency, and operates for information bandwidths up to 5 kmc. At 7,000 angstroms, its quantum efficiency is estimated at a minimum of 65 %, typical performance 85 %. The output is to a 50-ohm coaxial line.

New Radar Has 500-Foot Range

Designed for automobile obstacle detection at ranges up to 500 feet, a new and simple radar method is capable of working at ranges down to a few inches, according to Wesley D. Boyer of the Ford Scientific Laboratory. The equipment, described by Mr. Boyer in a paper read at the latest IRE convention, is a single microwave transmitter, using one tube. It is switched (diplexed) alternately between two frequencies. The receiver compares the phases of the two alternately produced Doppler frequency waves to obtain the range of the obstacle reflecting the wave. The device might also be useful, said Mr. Boyer, as an aircraft altimeter.

82 Channels on All TV's

Similar bills, passed by both houses of Congress, require that all future television sets shipped in interstate commerce be constructed to receive all vhf and uhf TV channels. Receivers imported from foreign countries are also included. The bill leaves it to the FCC to set up regulations to bring about the shift to all-channel operation, and to establish a time schedule. The present estimate is that it will take about two years before the majority of manufacturers can produce all-channel sets.

Japanese Production Up

Japanese electronics production increased roughly 20% in value in 1961, as over 1960. The figures, based on the first 9 months of each year, were released by the Dept. of Commerce, Television and radio receivers accounted for 48% of the 1961 production. TV receivers alone, for the 9-month 1961 period, amounted to 3,195,000 units, compared to 2,583,000 in the 1960 9-month period. Transistor receivers were up from 8,101,000 to 8,899,000. All semiconductors showed a significant increase, with transistors going from 104,377,000 to 129,947,000. Significantly, the value in thousands of dollars decreased during the same period, from $53,847,000 to $39,929,000, reflecting a sharp drop in transistor prices.

WWVH Makes Minor Changes

The National Bureau of Standards proposes minor changes in the schedule of radio WWVH at Maui, Hawaii, becoming effective July 1. Four 3-minute silent periods each hour will no longer be observed, and are being replaced by one hourly silent period, from 15 minutes to 19 minutes past each hour. The 34-min¬ute silent period at 1900 hours GMT (Greenwich Mean Time) will be retained as at present. One of the objects for the change was to make it possible to receive the time signals of either WWV or WWVH, without interference from the other. In the past, WWVH was silent at all times when WWV was. Now, WWVH will transmit during WWV's silent period, from 45 to 49 minutes past each hour.

Sigmund Loewe Passes - RF CafeSigmund Loewe Passes

Dr. Sigmund Loewe, radio and television engineer and inventor, died May 2 in Sarasota, Fla. Dr. Loewe was one of the earliest experimenters with television, and in connection with these early experiments. Dr. Loewe invented (in the late '20's) the first multiple tube, combining three tubes as well as coupling resistors and capacitors in a single envelope. This was done in connection with the search for a low-noise, wide-band amplifier for video signals.

At the time of his death, Dr. Loewe was president of the Loewe Radio Co. of New York, the Andromeda Co. of Switzerland and Loewe Radio Ltd. of London. His age was 76.

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