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Topic: Transistor radio

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	Transistor radio - Wikipedia, the free encyclopedia
		RCA had demonstrated a prototype transistor radio as early as 1952 and it is likely that they and the other radio makers were planning transistor radios of their own.
		It was the first transistor radio to utilize all miniature components and was the first Japanese radio to be imported into the U.S.A. The use of transistors instead of vacuum tubes as the amplifier elements meant that the device was much smaller and required far less power to operate than a tubed radio.
		Transistor radios have declined in popularity with the rise of portable digital audio players, which allow people to listen to the exact music of their choosing.
	en.wikipedia.org /wiki/Transistor_radio (977 words)

	Fifties - The Transistor Radio
		When the transistor was invented in the early 50’s, it was the beginning of a new era for radio.
		The potential for using the radio as an early warning device for the public was realized and some early radios were marked with the letters CD on a certain section of the dial.
		Transistor radios could be listened to with headphones and families began to turn away from the tradition of sitting around the radio as each family member listened to their own programs on personal radios.
	www.loti.com /transistor_radios_the_fifties.htm (575 words)

	Antique Radio Classified: Vintage Transistor Radios
		Although there were working demonstrations of the potential uses of the transistor presented to the audience (audio oscillator, audio amplifier, and radio receiver), no one present could have known or reasonably predicted the tremendous impact that this device would have on technology over the next 50 years.
		The transistor developed by Bell Labs in 1947 was of the type known as "point contact." This term refers to the technique used to attach two fine wires as points of contact to a germanium block, as shown in Figure 1.
		The junction transistor was constructed using a die or chip of germanium, with transistor action accomplished by any of several different manufacturing techniques, such as adding controlled amounts of impurities to the germanium -- the point contacts, with their inherent drawbacks, had been eliminated.
	www.antiqueradio.com /ward_history_12-98.html (2501 words)

	Vintage Radio and Electronics. My Collection. Early Transistor Radios. Page 2
		From the early 1960's a transistor radio in a valve radio cabinet.
		Radio Caroline is shown on the station dial which dates the set to between 1964-1967.
		From the 1960's a 10 transistor radio which was marketed by the Paynes Garage group.
	vintageradio.me.uk /transistor/storetran2.htm (536 words)

	Blaupunkt Derby Transistor Radio (1960s)
		On the bottom of the radio is a narrow, slot-shaped jack with eight pairs of opposing pins, into which you can plug a thin connector.
		Tube car radios were very expensive and the size of the E- and F-series tubes did not allow packing many HF or IF stages into the "standard" size box.
		Some radios of this type (especially the tubed) were used standalone, others had only the voltage adapters for the car battery, or the bracket had built-in power amplifier and/or connection for the car speaker and car antenna.
	antiqueradio.org /blau01.htm (1031 words)

	Gary Ball's Transistor Radio Attic
		One of Emerson's smallest radios, this one is in the rare tan color.
		Nearly all the radios I am offering on the attic rank in the top 10% and are a piece of transistor radio history from my personal collection.
		As a result, I have sold close to 100 transistor radios in under 2 years on the Attic, and each one went out with a complete satisfaction guarantee.
	www.radioattic.com /attic.php?sellerId=52 (757 words)

	WFMU's Beware of the Blog: The Intimate Audio Gadget
		What makes these radios even more valuable is the fact that they were manufactured for only one year, and they were made in a variety of shades of plastic, some of the colors are VERY rare.
		Another site I'd recommend, is "Sarah's Transistor Radios," which features a huge collection of photos of her prodigious collection of transistor radios (with a few walkie-talkies and radio-type gadgets thrown in for fun.) And, there are plenty of other places to satiate your need for vintage-tech porn like here, here, right here, and here.
		Old radios are one of the hottest items on ebay, and the classic transistors popular during those baby boomers "wonder" years are especially desirable.
	blog.wfmu.org /freeform/2005/10/still_portable_.html (3986 words)

	Antique Radio Page: Transistor Radios - Vertical (Site not responding. Last check: 2007-10-10)
		The speaker inside this radio is unusual: it's not typical, but an armature type, similar to the old 1920s designs (like the Peerless).
		This radio is pictured with its brown leather case and came in a blue and white box.
		The back of the radio has a tiny sticker which says "Hong Kong." The reference books show a Japanese Zephyr 620 made in 1962, but I'm guessing this radio was made a little later.
	members.aol.com /djadamson2/trans.html (519 words)

	BBC - Radio 4 You and Yours - Triumph of Technology: Transistor
		Though the modern transistor performs many functions, it is its ability to amplify an electrical signal and to act as a switch for which it is celebrated.
		Before the invention of the transistor in 1947, the flow of current in an electronic device could be controlled through the use of a vacuum tube.
		The first consumer item to utilise the transistor was the hearing aid; mass-market "transistor radios" were not promoted until 1954.
	www.bbc.co.uk /radio4/youandyours/technology_transistor.shtml (214 words)

	Transistor
		The transistor was invented at Bell Laboratories in December...
		For example, very weak radio signals in the air can be picked up by a wire antenna and processed by transistor amplifiers until they are strong enough to be heard by the human ear.
		Transistors are either NPN or PNP in the configuration of the layers.
	www.101science.com /transistor.htm (587 words)

	Channel Master Model 6518 Transistor Radio (1960) (Site not responding. Last check: 2007-10-10)
		This largish 14-transistor radio reminds me a bit of the "coatpocket" tube portables of the early 1950s.
		The radio is powered by four 1.5-volt C batteries held end-to-end in a single tube.
		Looking inside, it's evident that the radio's length was dictated by the decision about how to stow the batteries.
	antiqueradio.org /chan02.htm (214 words)

	Regency TR-1 Transistor Radio Facts and Figures
		While the transistor (the component, not the radio) was invented several years earlier at Bell Telephone Laboratories in the USA, the non-military application for the sometimes quirky device was limited to the narrow hearing aid market.
		Regency also produced some specialty-label radios based on the TR-1 design, such as the Bulova 250 in several styles and colors (note the similarity of the chassis, except for the missing earphone jack, although the earphone jack bracket is there!) and the Mitchell 1101 (or 1102, 1103).
		On some radios, the volume control solder lug closest to the edge of the radio is soldered to a wire.
	people.msoe.edu /~reyer/regency (4668 words)

	Radiophile.com - Transistor Radios
		After Regency brought the first all-transistor radio to market in 1954, other companies rushed to design transistors into their portables.
		This is a coat-pocket-sized transistor radio, with nothing in particular to recommend it, except that I had one like it when I was a kid.
		This is a radio that's embellished with a blade.
	www.radiophile.com /transist.htm (1121 words)

	ray8tp
		There is available now a portable transistor radio which will operate on batteries for 1/6 cent per hour of play, as compared with battery costs of from 5 cents to 22 cents per hour of operation in the conventional portable radios in CU's tests.
		But though the specter of transistor radios may give some battery manufacturers and tube makers sleepless nights, their fears are not likely to be realized during the 1955 season.
		Although the cost of operation of the transistor Emerson is less than that of its conventional counterpart, it is not proportionately lower because of the higher cost of the mercury type battery it uses.
	users.arczip.com /rmcgarra2/ray8tp.html (5054 words)

	Transistor Radio
		Transistors may have been useful to the phone company and to a handful of scientists building computers, but that wasn't enough to build an industry.
		Companies were eagerly buying transistor licenses from Bell, but if they were going to succeed, they had to come up with sales.
		The first transistor radio was a joint project between the Regency Division of Industrial Development Engineering Associates and Texas Instruments.
	www.pbs.org /transistor/background1/events/tradio.html (481 words)

	Transistor radio mini-history (Site not responding. Last check: 2007-10-10)
		Finally in November 1954, just before the Christmas shopping season, IDEA managed to put the first transistor radio, the REGENCY TR-1, on the market at a price of $49,95 excluding the leather case (another $3.95) and the earphone (another $7.50).The Regency was the first one on the market but not by much.
		This was (and is) the most typical of all transistor radios, the one by which all the others were going (and are) to be judged.
		From a piece of furniture the radio set had become a personal accessory.This also meant that the radio, which was reguarded essentially as a home accessory, which was controlled by the head of the family, could now go out of the house and reproduce itself for each individual.
	www.etedeschi.ndirect.co.uk /tr.radio.history.htm (1906 words)

	Masaru Ibuka
		He brought transistor technology to Japan, and Sony built the first Japanese transistor radio and the world's first transistorized television set.
		He convinced Bell to license the transistor technology to his Japanese company (this is a testament both to Ibuka's persistence and scientists' openness to sharing information even so soon after the war).
		While Regency and Texas Instruments in the US may have built a transistor radio first, it was the Tokyo company that really invested the radio as a viable commercial product.
	www.pbs.org /transistor/album1/addlbios/ibuka.html (471 words)

	transistor radio
		In Germany, Robert Denk may have produced a transistor radio in February of 1948.
		The germanium transistor was first demonstrated privately at Bell Labs Dec. 23, 1947, by William Shockley and his team.
		Other U.S. companies introduced dozens of transistor radio models and by 1959 almost half of the 10 million radios made and sold in the U.S. were the portable transistor type.
	history.sandiego.edu /gen/recording/transistor.html (553 words)

	Howstuffworks "How Radio Works"
		Even though radio waves are invisible and completely undetectable to humans, they have totally changed society.
		Whether we are talking about a cell phone, a baby monitor, a cordless phone or any one of the thousands of other wireless technologies, all of them use radio waves to communicate.
		Things like communication and navigation satellites would be impossible without radio waves, as would modern aviation -- an airplane depends on a dozen different radio systems.
	www.howstuffworks.com /radio.htm (264 words)

	Transistor Radios, Crystal Radios: Pix and Info on Collectible Radios
		Learn all about the world’s first transistor radio and related collectible radios, including variations, date codes, accessories, rarities, vintage ads, much more.
		Transistor radio history comes alive with 102 new color photographs of all the Sony collectible transistor radios.
		Global and Zephyr transistor radios--these classic radios are some of the most beautiful consumer products ever made.
	www.ericwrobbel.com (569 words)

	Antique Radio Classified--With The Collectors
		The transistor radio story began with the development of the Regency TR-1, a 4-transistor AM-only set that would fit in a shirt pocket.
		This transistor escalation is all reminiscent of the tube race of the 1930s when some makers trotted out sets with an ever increasing number of tubes, most of which actually contributed something to the sensitivity or audio power.
		The highest count transistor radios are usually the least collectible, and I continue to snatch 'em up at yard sales looking for an 18- or 20-transistor set with an ugly little secret waiting to be found.
	www.antiqueradio.com /Apr05_MacArthur_TransistorRadio.html (764 words)

	Transistor radios – then and now - Tech News & Reviews - MSNBC.com
		The radio of choice for this task is the Freeplay Lifeline. It’s large (7.5 by 13 by 5.25 inches), heavy (4 pounds) and bright blue.
		The cathedral-shaped, AM/FM/short-wave radio has its serial number emblazoned on the tuning dial for everyone to see. That serial number is nearly impossible to remove without breaking the front of the radio. That makes the Lifeline harder to steal. Operation is simple and sound quality is pretty good.
		Many of the children who receive the Lifeline radios are heads of their households, and are responsible for the well being of their younger siblings and relatives. There are approximately 400,000 children in Rwanda that live in households affected by the legacy of their country’s genocide of 1994, and the increasing impact of HIV/AIDS.
	www.msnbc.msn.com /id/6288916 (709 words)

	Halfbakery: single station transistor radio
		In a typical transistor radio, the incoming signal is mixed with a signal from the local oscillator, then amplified using a narrow-bandwidth amplifier (or, more likely a number of amplifier stages) that is (are) tuned to a fixed intermediate frequency (455 kHz in the case of AM radio).
		It'd be really interesting to see a transistor radio that was designed from the ground up to work at one specific frequency, though.
		I built a Radio Shack crystal radio when I was about 10, and for some reason it only picked up one station throughout its entire frequency sweep (luckily it was the popular station of the time).
	www.halfbakery.com /idea/single_20station_20transistor_20radio (1802 words)

	Sarah's Transistor Radios
		I have been collecting radios since I was a child, but only in the last ten years has the collection grown immensely.
		The site features over 1000 photos of radios in my collection, along with manufacturer and model number, if known.
		Radio Restoration: Restore a transistor radio with these easy steps.
	www.transistor.org (138 words)

	Transistor Radios
		This magnificent knight in armour is a real transistor radio made in Japan in 1959.
		Cost is $150.00 The hight of this radio is: Approx: 12 inches and the base about 6 X 4./1/2 inches.
		This radio is a copy of a Cola Cola cooler.It has AM/FM/and a tape recorder under the top.
	www.rgbent.com /transistor.html (343 words)

	Sal's Transistor Radios (Site not responding. Last check: 2007-10-10)
		This is a near mint 1959 Silvertone leather transistor radio which was found on ebay.
		This radio looks like it was never used as the radio and case are in perfect condition
		RCA Victor radio with case, used and abused.
	www.tuberadios.com /transistor.html (142 words)

	M. Ward: Transistor Radio (2005): Reviews
		Ward’s only failure in his bid to create a paean to another era is Transistor Radio’s length.
		The hit and miss nature of Transistor Radio makes it seem more like a compilation of songs rather than a cohesive album.
		Transistor Radio's songs do lack the shirtfront-clenching grip of Ward's Transfiguration of Vincent set.
	www.metacritic.com /music/artists/wardm/transistorradio (644 words)

	Vintage Transistor Radio Circuit Diagrams - Schematics - Servicing Information
		In addition to a circuit / schematic diagram for your transistor radio you get alignment instructions, parts lists, specifications and replacement data, circuit voltage readings, servicing tips, etc....all the info you need to get your early transistor working like new.
		We are active in a number of radio clubs, namely: AWA, MARC, LVRC, OVRC and OVRA.
		To assist fellow collectors in getting their early radios working again we offer service information for early transistor / solid-state and old tube radios.
	www.justradios.com /transistors.html (214 words)

	Vintage Radio and Electronics. Transistor Radio Projects
		Transistor Radio Projects for the Radio Constructor from the Early 1970's
		All articles are © Practical Wireless Magazine and are reproduced by kind permission of the editor.
		From Practical Wireless magazine in the early 1970's these are a collection of various transistor projects.
	vintageradio.me.uk /radconnav/transistor_projects.htm (74 words)

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