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Topic: Radio tube triode

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	Antique Radio Classified: The Emerson Multivalve Tube
		The Multivalve tube is employed as an RF amplifier, detector and AF amplifier.
		The use of the Multivalve tube was not limited to factory-produced radios.
		These tubes were followed by more twin triodes, triodes with two diodes, triodes with pentodes, and on and on.
	www.antiqueradio.com /bintliff_multivalve_4-97.html (1409 words)

	Antique Radio Classified: The 300B Tube Lives Again!
		Tube audiophiles will be interested in the results of various listening tests, comparing modern reissues against each other, and against vintage 300Bs.
		Each reissue tube comes with a card listing its serial number and the test results for that specific tube: interelectrode capacitances; filament, plate and grid current; plate resistance; grid-plate transconductance; amplification factor (mu); delta transconductance at 4.5 volts; and plate curves for the plate current versus plate voltage.
		The attention now given to tube amplifiers (especially using the 300B) is shifting from push-pull amplifier circuits of the Macintosh, Dynaco, Heathkit, and others popular in the late fifties and sixties, to single-ended triode circuit designs without the use of any feedback.
	www.antiqueradio.com /300B_01-98.html (2584 words)

	WA2ISE sub-mini tube AM radio page
		When the rectifier tube and other tubes are warm enough to conduct current thru their cathodes, this current will add with the heater string current to pass thru the submini tube heaters.
		The mu (20) of the 6111 tube is the same as the mu (20) of the oscillator portion of a 12BE6 (cathode, g1 and g2 (which corresponds to the plate of the 6111)).
		Fire the radio up, and with the other radio tuned to that weak station, tune around the dial on the mod radio, and if the triode tube is working, you should hear the local oscillator.
	home.netcom.com /~wa2ise/radios/AA5submini.html (5079 words)

	Compactron "AA3" AM tube radio
		The mu (18) of this tube is similar to the mu (20) of the oscillator portion of a 12BE6 (cathode, g1 and g2 (which corresponds to the plate of the 8B10)).
		As this tube was intended to be a horizontal deflection output, it doesn't expect to be able to continuously pass 450 ma at 50 v plate current, as this would exceed the plate dissipation.
		This allows a tube to be used in a Class A amp at its max rated voltage (B+) and allow enough headroom for the AC envelope of the signal to ride on top of the B+.
	pw2.netcom.com /~wa2ise/radios/compaa3.html (5744 words)

	Home Brew Doerle 2-Tube Radio
		Using original parts and hardware for this project would be fun and give me a sense of what it was like to build a regenerative tube radio from scratch.
		The two triode tubes are used as a regenerative detector and an audio amplifier.
		This radio has heightened my appreciation and enjoyment of the hobby and I would encourage others to give it a try.
	www.philcorepairbench.com /doerle.htm (616 words)

	Amateur Radio History
		Radio is derived from the Latin radius (ray or beam of light).
		Amateur Radio License Requirements for the two grades of licenses, Amateur first grade and Amateur second grade, were the same except the second grade license was issued only where an applicant could not be personally examined by a US Radio Inspector for the district.
		Dedicated to organizing and providing representation of the interests of Amateur Radio, nationally and internationally, for the better mutual use of the radio spectrum among radio amateurs throughout the world, to develop Amateur Radio worldwide, and to successfully interact with the agencies responsible for regulating and allocating radio frequencies.
	www.ac6v.com /history.htm (10412 words)

	Single Triode Regenerative Radio Receiver
		This radio employs the most popular and successful regenerative radio circuit used by radio experimenters in the 1920s.
		A single-triode vacuum tube (01A, 37, or 76) is used as a very sensitive regenerative detector.
		Any early radio enthusiast will be extremely pleased with the wonderful operation of this radio receiver when used with a good (easy-to-construct) antenna and ground system.
	www.arcsandsparks.com /singleregenerative.html (281 words)

	Vacuum Tube Audio
		Five phono stages designs, two using the type 416 planar triode intended for low Z, low output cartridges (MC) and three for high output cartridges (usually MM), two of which feature a hybrid cascode front end specifically developed for the Sumiko Blue Point Special.
		This, while not entirely intuitive is quite easy to use once you have figured out how to enable the tube models (or somebody has shown you how).
		While a bit limited in the number of nodes it will analyse, it is good for filter and network design, also for "getting on the page" with DC coupled stuff e.t.c.
	www.triodeguy.com /vacuum_tube_audio.htm (464 words)

	diyAudio Forums - Help - tube radio
		Tube ECH81 broke when I touched it, it was all white inside.
		It is probably an ECC85 double triode, used as an FM tuner head, though I can't locate a detector.
		It is used as an oscillator (triodes section), and mixer (heptode section).
	www.diyaudio.com /forums/showthread.php?postid=135168 (664 words)

	Radio Products Miniature AC Tube (Site not responding. Last check: 2007-10-21)
		This tube (the small one) was made by the Radio Products company of Newark, NJ in 1932.
		It is an AC operated cathode type triode which is more or less equivalent to the standard type 27 tube shown above it.
		This tube, and a companion mercury-vapor rectifier of similar size, were used in a tiny cathedral style clock-radio that was made in very small numbers, and marketed only in northern New Jersey.
	uv201.com /Tube_Pages/radioproducts.htm (101 words)

	Studio-quality triode-tube $4000 iPod speakers
		Using superior analog technology all but lost in today’s common digital electronics, this is the first tube-based iPod speaker system, producing a luxurious warmth and clarity prized by audiophiles and previously difficult to reproduce outside of custom-built amplifiers of a handful of live musicians.
		Developed and built by German audio technicians, the system consists of an aluminum-encased amplifier housing four powerful Class-A tubes which glow gently as they generate warm, low-octave sound that is virtually distortion-free, considered by audiophiles to be the most pleasing to the human ear.
		Start with a great tube mic, a Class-A mic pre, a top-notch A/D converter (running 24bits and at least 88.1kHz) and a mixing system comparable to Pro Tools LE or better and you can obtain a sound to rival anything available if your acoustic environment is working with you rather than against you.
	www.nonstopmac.com /2005/12/studioquality_triodetube_4000.htm (995 words)

	JustRepairs Service and Repair Antique Car tube Radio Restoration
		The tubes are: 7A7, 7B8, 7A7, 7B6, 7C5, and 7Y4.
		The radio has six push buttons, five are labeled 1-5 and one has a M on it.
		This new edition of the classic Practical Handook of Valve Radio Repair has been expanded to provide a comprehensive guide to the restoration and repair of valve audio and radio equipment for professionals and enthusiasts alike, with new material on valve amplifiers.
	www.repair4less.com /antique.html (624 words)

	Building a "Radio-Head" Tube Preamp
		This project came into being simply because I had some old radio tubes that were given to me - a 12BA6 (remote cutoff RF pentode) and a 12AT6 (duo-diode hi-mu triode).
		He built this preamp around these tubes because they were easily obtainable where he lives.
		The tube sockets are held in place by a couple of brackets fashioned out of some sheet aluminum.
	www.diyguitarist.com /DIYStompboxes/RadioHead.htm (904 words)

	Tube amplifiers, schematics, parts, triode amplifiers (Site not responding. Last check: 2007-10-21)
		Kennedy tube page tube audio including SE and pushpull amplifiers, line stages and phono stages, DHT, Triode, direct heated, single ended triode, pushpull tube amplifier, tube pre-amplifier, tube line stage, tube phono stage, D.I.Y. tubes, tube, tubes, valvole, buizen, lampes, 45, 2A3, 300B
		Tube amplifier schematics archive of some of the best built bass and guitar tube amplifier schematics.
		Tube circuit of the month archive line stage amplifier, auto bias, voltage regulator, active crossover, tube headphone amplifier, two stage phono preamplifier, common cathode amplifier,
	users.telenet.be /educypedia/electronics/tubesamplifiers.htm (495 words)

	Dave's Homemade Tube Radio Page (Site not responding. Last check: 2007-10-21)
		It could be called a two tube set as there are two sections to the one tube.
		The reflex radio has it's roots going back to the early tube radio days of the 1920's.
		For this radio to work it's best, the two tuned circuits have to move the same when the tuning is changed.
	www.schmarder.com /radios/tube/reflex.htm (663 words)

	eBay - triode tube, Vintage Electronics, Industrial Electrical Test items on eBay.com (Site not responding. Last check: 2007-10-21)
		USSR Tubes Military Audiophile Triode 6C41C Lot of 10
		USSR TUBES triode - heptode 6I1Pi = 6AJ8/ECH81 QTY=4
		TRIODE VACUUM TUBE BASE AND ANODE CAP USED
	search-desc.ebay.com /search/search.dll?query=triode+tube&newu=1&krd=1 (490 words)

	FAQ
		It is not intended to be an all-inclusive listing of all tubes currently made around the world, we suggest you consult with tube manufacturers or dealers for other types.
		All eye tubes are believed to be out of production at this time.
		Suggest contacting audio tube dealers, if they don't have any then the amp must be converted to 6L6GCs (this is a considerable modification, it will give less output power).
	www.vacuumtube.com /FAQ.htm (3745 words)

	Antique Radio Resources: Tube Audio
		The main manufacturing program includes vacuum tube preamplifiers and power amplifiers.
		The main features of these products are triode configuration, short signal path, zero or low feedback.
		We invite you to view their legendary Scott Stereomaster consumer electronic components including: FM Wide-band tuners, integrated amplifiers, preamplifiers, power amps, receivers, turntables and speakers.
	antiqueradios.com /links/Tube_Audio (186 words)

	Twin Triode Regenerative Radio Receiver
		The circuit of this regenerative radio employs a 6A6 twin-triode vacuum tube to accomplish both regenerative detection and amplification of incoming radio signals.
		Built on a finished, pattern-grade hardwood base, this regenerative radio receiver has antique 1930's parts and fixings.
		Any antique radio aficionado will love owning one of these elegant, historically accurate regenerative radio receivers.
	www.arcsandsparks.com /twinregenerative.html (280 words)

	Triode Electronics: Old Radio Tube Advertising
		Tube hype has been with us about as long has tubes have.
		Ceco was an old time tube distributor who merged with Richardson in the 1980's.
		National Union tubes, brought to you by the Davega Song Birds.
	www.triodeel.com /tubeads.html (240 words)

	Double Twin Triode Regeneration Radio from Scott Armstrong
		May want to test the circuit also with my favorite 6AK5-5654-6ZHE1P tube, using another one triode connected as the grounded grid RF amplifier stage...
		You may want to try (for more audio output to headphones and also quite enough for a loudspeaker) to use an ECL82 triode-pentode audio amplifier tube, that was very popular among European radio receiver manufacturers of the late fifties and early sixties, before transistors took over the stage.
		Also, you may want to test the European ECC85 noval 9 pin miniature dual triode for the RF amplifier and regenerative detector stage instead of the 6SN7.
	f4dyt.free.fr /2xt.htm (902 words)

	VAC Renaissance Series 300B Triode Tube Amplifiers
		One may be forgiven for focusing initially on the unique and elegant aesthetics of the PHI components.
		Rather than being hidden, the tubes are celebrated behind the stylish edge-lit glass fascia and beveled glass top, which also keep children and pets at a safe distance from the tubes.
		The chassis itself, with its sweeping smooth corners and contours, is precision milled at VAC from the highest quality non-magnetic aluminum and finished in nickel hue, which is beautiful, extremely durable, and provides good rejection of radio frequency interference.
	www.vac-amps.com /phi_intro.htm (570 words)

	Vacuum Tube Museum
		1927 Telefunken RS5 triode: Telefunken brings an amazingly low-priced KW transmitter tube to market for amateurs.
		1935 Philips TC 1-40 triode: This low-priced KW transmission triode of approx.
		With the next three radio tubes the suppressor grid was no longer connected to the cathode, but led out on a pin.
	www.oneillselectronicmuseum.com /page10c.html (324 words)

	The Ionosphere
		Marconi transmits radio signal across Atlantic Ocean from Cornwall, England to St. John's, Newfoundland
		The Space Environment Center has a pdf file on radio wave propagation.
		Even more detail on the allocated uses of the radio and microwave spectrum from 535 kHz to 300 GHz
	www.albany.edu /faculty/rgk/atm101/ionosph.htm (948 words)

	Tubes
		Our What We Say Is What You Get policy means that we don't relabel tubes with phony brand names, or put fancy gold lettering and boxes on them, or tell you that little elves in the Black Forest made them in order to charge you 5 or 10 times what they're worth.
		Tubes include a 6 month exchange warranty against defects.
		Where tubes are priced as matched pairs, matching is included in the price!
	store.triodestore.com /tubes.html (290 words)

	Florac Tiny 2-Tube radio (Site not responding. Last check: 2007-10-21)
		The little phenolic chassis has an old style diode, looks similar to a glass 1N34, a small permeability tuner, on-off /volume control, tiny audio transformer, a choke, and a few resistors and capacitors.
		After some internet and e-mail queries, I have learned that the Florac is the predecessor, probably in 1955-56 of the near identical set named the Hastings FM Jr.
		The designer of these radios, Richard Florac, designed a first-generation pocket paging system, for which he holds a patent.
	oak.cats.ohiou.edu /~postr/bapix/FloracRd.htm (315 words)

	Dave's Homemade Tube Radio Main Page
		Single Tube DX Radio Acorn Tube DX Radio
		My interest in radio goes back to around 1955 when I was 5 years old.
		Leeds Radio A great old firm that got it's start in the 1920's.
	www.schmarder.com /radios/tube/index.htm (385 words)

	6S4 Micro Triode Tube Amplifier (Site not responding. Last check: 2007-10-21)
		When my 9-year-old daughter asked for a small stereo so she could listen to her CD's I decided to introduce her to the world of tube audio.
		After considering many of the common audio triodes, I decided to use a small triode that has seen little use in the audio world.
		It is a medium height 9-pin miniature tube, inexpensive and plentiful.
	www.the-planet.org /6S4.html (253 words)

	Audio Talk! - Tube Shortwave radio? (Site not responding. Last check: 2007-10-21)
		AllAudio.org is a free, independent resource made available to you by a group of volunteers.
		I hear the 7360 was THE mixer tube.
		probably use it and a FET VFO for a 1 tube converter.
	www.allaudio.org /detail-7214738.html (768 words)

	Teletone
		Triode 10Y / VT25 new in original military box, date may 1944, 10Y Printed on the glass and GE Logo, VT25 Printed on the glass ---- 100 Pcs
		GEC made 6J7G / 10E348 tubes new in original military box, with silver mesh plate, similar to Western Electric 348A, very good sounding tube.
		Rare RECTIFIER tube made in 1940's, new in original Military brown box.
	www.teletone.com (907 words)

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