The company subsequently invented the loudspeaker, successfully brought sound to motion pictures, and introduced systems of mobile communications which culminated in the cellular telephone. Can anyone compare the new genelex px300b tube to either svetlana 300bs, western electric 300bs, sophia 300b mesh plates,newer kr300b tubes or electro harmonix 300bs. New listing stunning tannoy 15 monitor black speaker 1947 rare grf western electric 300b. I have 2 matched quads of western electric 300bs ive had for years in storage. Western electric archived amplifier specifications. Noone can tell me or any other sentient being that the 300b costs more to manufacture than the big broadcast triodes yet premium new production 300bs are consistently costlier, and in a few instances, hugely so. Like the original western electric 300b tube, it has the 8 course directly heated filament, 40 watt plate dissipation, classic large shoulder tube glass, and are precision matched. Stamou has built this amplifier with lundahl ll1623 audio output transformers. Can anyone compare the new genelex px300b tube to either svetlana 300b s, western electric 300b s, sophia 300b mesh plates,newer kr300b tubes or electro harmonix 300b s. From my experience the svetlanas sound a lot like the western electric 300b reissues. The outline parameters for the new device were to produce an amplifier that could not be improved upon. New western electric we 91e integrated amplifier first look at the final design of the we 91e integrated amplifier, debuting at axpona audio expo north america april 2019. Brought to reliable perfection by western electric usa and later by standard telephones uk as the 4300b, the 300b was very much intended and widely used for telephony. They began in 1935 using a single 300b early models were using 300a with two 6c6 pentodes and an input transformer to accept balanced input.
The cetron brand 300b wasis made by richardson electronics and is a true veteran in this lineup. As of july 15, 2019, western electric is no longer accepting new preorders. In electronics the 300b is a directlyheated power triode vacuum tube with a fourpin base, introduced in 1938 by western electric to amplify telephone signals. Aug 24, 2010 this is our diy tube amplifier with famous western electric 300b triodes and siemens c3g pentodes here strapped in triode mode.
Ive said it before, but boy are we 300b valve addicts lucky. The 300b is a filamentary type triode designed for use as an audiofrequency power amplifier. Owning a pair of original western electric 284a is a dream for many hifi audiophiles who own 845 tubes amps, in order to experience what the past glory of tube production could bring to their music system today. Please note, the only tube out there that actually sounds like a real western electric 300b etched or yellow base valve is the reissue we.
Chokeloaded triode direct coupled to dht driver, transformer coupled to the pushpull 300b output tubes. A listing of the main graybar offices throughout the country is presented on page 16 of this bulletin. Tube manufacturing 000000000000 at western electric. Classificationmoderate power, filamentary triodes for class a service. I used tango nc14 interstage and fx405 output transformers, which ive had around for a while. The eh 300b tubes plate curves and static dc characteristics plate resistance, transconductance, mu also exactly match the originals so you can drop them into any. In his role, dan was charged with pulling together all the different engineering teams and delivering prints to the manufacturing side were he would guide the products to completion. When you intent to get the maximum out of a 300b, and operate this tube at the limits of safe operation, it is a better idea to use the 300b xls in such a case. New production 300b tubes steve hoffman music forums. In this article, howard stone first leads us through a nostalgic history of the western electric type 300b audio amplifier triode tube. The famous triode was developed at bell labs in 1933 in the form of its predecessor, the 300a, which was modified, patented, and then produced at. The final device proved so successful with respect to linearity that even up until this day the 300b has. Standard triode power amplifier western etectric description the 300b.
The 300b tube has the bayonet pin so located that it may also be mounted in a western electric loom, 115b or similar socket. The westrex people claim to make the new 300b with the same quality materials and some ot the same manufactur ing molds and tooling as the old western electric 300b. The most famous vintage singleended amplifier is western electrics we 91a, which was used for theatre and public pa application. Technical inquiries it is the objective of the western electric company to furnish. Flat sound without any magic or mystery 300b are supposed to sing. What struck me about the krs at the time was cleanliness, dynamics and control.
What follows is a report on the resurrgence of the 300b through. These vacuum tubes employ medium, fourpin thrust type bases suitable for use in western electric 143b or similar sockets. In my wavac im using the reissue we 300b but ive used the chinese versions as well with no problem. This is our diy tube amplifier with famous western electric 300b triodes and siemens c3g pentodes here strapped in triode mode. This tube is a direct replacement for the western electric e300b as build until 1988. In addition to completing our new electron tube operation in 2018, we made great progress with a new integrated amplifier, the 91e. To secure price and delivery information, contact your nearest graybar office. Hold an 845 or 211 in one hand and a 300b in the other. Slightly used western electric get their much loved 300b valves back into production, plus the brand has also made great progress with a new integrated amplifier, the 91e the western electric we 91e was recently taken from prototype stage three into preproduction. In 19, western electric developed the high vacuum tube, thereby ushering in the electronic age. Compared with va 4300b, shuguang 300b z, or shuguang 300b 98, those 3 were far away better.
In electronics the 300b is a directlyheated power triode vacuum tube with a four pin base, introduced in 1938 by western electric to amplify telephone signals. Ua 450 v wa 40 w maximum plate curent of everage tube for fixed bias ia 70 ma maximum plate curent for manually adjusted grid bias or selfbiasing ia 100 ma. What i dont recall is the waft, wax and wane factor for lack of better terminology of the western electric. Along the way, the company made tremendous breakthroughs. The legendary shindo western electric 300b limited mono block amplifier. The result is the fatboy 300b amp named as such because, like me, it is a tad overweight. Free western electric diagrams, schematics, service manuals. Western electric diagrams, schematics and service manuals download for free. Power tubes upgrade 3, sophia princess 300b mesh plate black base matched pair 2pcs comparable to western electric 300b the result is a 300b mesh plate tube with super clarity, low distortion and out of this world mid range fullness and liquidity. This tube combined everything good that can be found, to a smaller or larger extent, in the tubes described above. Jun, 2016 300b pure class a single ended triode set monoblock tube amplifiers design, build and demo duration. Personally, any of those full music type 300bs work just fine and im a spoiled nos tube guy. Be sure to include your full name, desired 300b set and quantity, and ship to country.
Current new production 300b tubes like the electroharmonix 300b and the jj 300b sound wonderful at a fraction of the western electric 300b price. Nov 12, 2014 personally, any of those full music type 300b s work just fine and im a spoiled nos tube guy. The 300b direct heated triode the 300b directheated triode was originally designed in 1929 by the western electric corporation of america. Charles whitener president, western electric writes it is my distinct pleasure to announce that the we 300b electron tube will reenter production this year, in time for its 80th anniversary. Compared with va 4300b, shuguang 300bz, or shuguang 300b98, those 3 were far away better. The svetlana 300b uses ultrapure carbonized nickel plate material and a proprietary oxide coating on the filament to give western electric like performance. A collection of amplifier specifications from the western electric library.
Western electric announce 300b to reenter production, launch. What follows is a report on the resurrgence of the 300b through reissues being produced by several manufacturers. Though 40 watt is possible, this is a peak value only, and no normal working point. This tubes have run my 300b pro mda french we91 version for a very short period of time. It has been around pretty much since the late 80s when western electric stopped production and richardson decided to fill the gap. Ken shindo designed his first 300b single ended amplifier in 1979. A472 ld504 t2652 300b tube 300b triode vacuum tube 300b 300b power triode tube 300b we 300b 300b western electric 300b western electric 5300b. I no longer have those test samples for a comparison. However, the scarcity has driven the price to very high level that many audiophiles cannot afford or obtain. Aes elibrary tube manufacturing at western electric. The 300b tube has the bayonet pin so located that it may also be mounted in a western electric 100m, 115b or similar socket. Slightly used 300b base and vacuum tubes employ medium, fourpin thrust type bases suitable for use in estern electric 143b or similar sockets.
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