Free western electric diagrams, schematics, service. It is a parallel single ended, class a amp with zero feedback and. New production 300b tubes steve hoffman music forums. Being engineers ourselves, we wanted to produce electrical designs faster and safer, without manual typing errors. In addition to completing our new electron tube operation in 2018, we made great progress with a new integrated amplifier, the 91e. Schematics, service manual or circuit diagram for western. I have no copy of the schematic for the 1916 version available at the time of writing. The most famous vintage singleended amplifier is western electrics we 91a, which was.
These vintage parts came from leeds radio just a few subway stops from my apartment in brooklyn. The western electric 300b tubes are a must to realize their full musical potential. Acousticplan phonomaster western electric 91a western electric 16a western electric 22a western electric 46c western electric 300b western. Anyone know the true tube compliment, to help put an end to this. Jan dupont has a big collection of schematics and service manuals for all sorts of audio equipment. Western electric rosetta stone for triodes nutshell hifi. We accept cash, paypaladd 3% and etransfer for used equipment. Home services downloads custom software about contact. The fis are the most evenhanded 300b amplifiers i have yet come across. Spin buttons are available on most dialog boxes to reduce typing. The single signal path capacitor is an audio note jensen silver foil in oil unit. Notes single piece phone built with the housing of a traditional we metal subset ringer box. Western electric to reintroduce famous 300b electron tube.
The 150yearold western electric will reintroduce its flagship product to market, the famous 300b electron tube. The amps are modeled after the western electric 91a circuit, with a single gain stage replaced by an easytoget 6sj7 instead of the original we310a tube. 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. The most intriguing circuit in the book is the western electric 92a amplifier on pages.
Now with the western electric 110a program amplifier, another major step has been. Charles whitener, western electric ceo, also confirmed the company will unveil a new singleended amplifier called the 91e, as an homage to its famous predecessor the 91a, first introduced in 1936. Sewing machine automatic answering service mirrophone wire ribbon recorderplayer telephones picturephone bell chime. Archived amplifier specifications western electric. Many of western electric s original amps are considered vintage models depending on what year they were manufactured by the company. Faith, hope, salvation the single ended tube amplifier. Used all vintage caps and vintage resistorsalen bradley and ohmite. The 91 series are quite conventional and the grid to cathode trick is only used at the. Western electric 300b singleended tube power amplifiers.
Angela model 91 monoblock tube amplifiers 300b western. The singleended 262a driver of the we 92a uses parallelfeed transformer. A lot of the 91a circuits out there propose substituting a 6j7 or a 6c6 for the 310a, without any modification to component values. How to develop a defensive plan for your opensource software project. See more ideas about tube, vacuum tube and valve amplifier. I guess the we schematic is as authoritative as you can get. Symbol and wires in electra are intelligently and automatically. There is some overlap between pro and consumer audio equipment, so check both categories. Western electric 91a amplifier service manual download. Sophia electric 9101 300b monoblock power amplifier. We publish this circuit and diagram for free for personal use.
Hifi stereo amplifier gain regulation with potentiometer. Born in england in 1850, edward weston attended medical school and became a chemist. Western electric announce 300b to reenter production. The sophia electric 9101 300b is a singleended power amplifier designed around the 300b directly heated triode tube, operated without negative feedback. The most famous vintage singleended amplifier is western electric s we 91a, which was used for theatre and public pa application. And the program is absolutely free to try for 21 days. A minimalist two step amplifier can show up with a lot of advantages against any other tube amplifier design principle. To maximize productivity, we designed an electrical cad software that requires minimal typing.
It is, therefore, important to have the right tools to design the most effective diagrams in this digital era, a schematic drawing software is. Western electric vintage amplifiers and tube amps for sale. Completed on 81808 hi, i just wanted to compliment you on your craftsmanship, i purchased the 300b monos last year that you had built for. 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. Ive been doing research off and on regarding western electric 300b amplifiers. 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. Western electric 91a clone discussion maxhifi set asylum. Service manuals, schematics, eproms for electrical technicians. The weston electrical instrument company was founded by edward weston. I found mins tube audio lab searching for modern we91a builds. In practice, the rack stayed behind, and was filled with a pair of 86b, 91a. Hello, there seems to be a controversy brewing on what were the original tube compliments on the western electric 91a 91b. I am proposing to follow the original 91a schematic exactly, with the exception of a couple of points, and also have a couple of general questions regarding the original schematic. A collection of amplifier specifications from the western electric library.
Western electric 300b singleended monoblock tube power amplifiers 310a 274a 5z3. Click here if you want the complete western electric 92a schematic. Western electric 91aclone 300b mono block dealer ad. There is no faster and easier way to create professional looking electrical schematics and wiring diagrams than ez schematics. Its inputdriver tube is a chinesemade 6sn7 dualtriode, implemented not in the rather common seriesregulated, pushpull srpp mode, but rather, according to richard wugang, in a manner. That being the case, for a long time, they have preferred a desirable means of communication and representing projects. Back to our topic, the single ended amplifier, based on its most famous incarnation, the western electric 91a model, is still today a wonderful application as tube amp, but there is no real need to perfom the expensive 300b tubes. Audio note, we 91a, rega, ayon 12012 i built a 300b single ended triode amplifier based on joe roberts western electric 91a. Western electric diagrams, schematics and service manuals download for free.
This is our diy tube amplifier with famous western electric 300b triodes and siemens c3g pentodes here strapped in triode mode. The 216a triode was one of the first tubes made by western electric. Watkins diagrams 42 watt radio diagrams 171 wavetek diagrams 62 wayne kerr diagrams 2 webcor diagrams 1 weco diagrams 4 wega diagrams 2 wells gardner diagrams 3 wem diagrams 30 west diagrams westbury diagrams 12 western electric diagrams 97 westinghouse diagrams 8 wien diagrams 2 wiltron diagrams 18 winner. Completed on 81808 hi, i just wanted to compliment you on your craftsmanship, i purchased the 300b monos last year that you had built for a customer. Schematic diagrams offer a fast way of conveying information on a particular project or process with great ease.
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