This 7025 is a high quality and very rugged custom 12ax7 tube produced for us in china by the shuguang factory. For example, a czechoslovakian made jj 12ax7 will be different from a sovietmade sovtek 12ax7. Use of the 7025 in this application is advantageous because of its low hum output. The entire 1945 taylor tube catalog in pdf format note, 1. The plates are manufactured out of a premium metal imported from germany and supported with extra thick mica spacers to insure against microphonics. The 7025 wa supports a fat midrange and creates a bold tone with lots of harmonics. The sylvania type 7025 is a miniature highmu twin triode having separate cathodes. You can use any current production 12ax7 tube as 12ax7a, ecc83 or 7025.
Strong rca by ge short gray plate o getter 7025 tube 98104. Pair of vintage sylvania 12ax7aecc837025 vacuum tube, made in usa 15643473798. I have milspec sylvania 7025s with green writing jan standard and normal sylvania 7025s with yellow writing that are identical. Key data and drawings are shown below, or you can download the 12ax7 datasheet in pdf format. All of our years of experience in testing, rating, listening, and customer knowledge are brought us with the most positive customer feedback, have the best build quality, and which we subject to our most exhaustive testing yet. Tubes marked with both 12ax7 and 7025 are usually low noise as well. Vacuum tube 7025, china 7025 9 pin miniature preamp tube made in china lower humnoise version of a 12ax7ecc83 voltage gain rating. Hifi low noise version of the 12ax7 with all other specifications being the same as 12ax7. Vacuum tube 7025wa, tube amp doctor, highgrade, premium selected. If you look closely at all the sheets, all conditions listed for the 12ax7 are identical to the 12ax7a and the 7025.
The slurry cup drive automatically rotates the cup at the required, standard rate of 150 rpm. Make offer rca 702512ax7a tube made in usa, gray plate balanced nos guitar amp fender. Page 1 table of contents page 2 page 3 page 4 section 1. To access any of the files below, simply click on the link. This twostage audio preamplifier is intended for use with highfidelity magnetic phonograph pickups. The circuit is from the rca tube receiving manual and meant for use with the famous rca 7025 twin triode. So designers can get two gain stages using just one 7025 valve. Double triode ecc83s is 12ax7 high gain preamplifying double triode.
See all about 12ax7 tube page for answers on common. No microphony issues even with the most sensitive preamps. After the original 12ax7, additional variants were issued with various industrial numbers including the 7025 as well the 12ax7a. It was released for public sale under the 12ax7 identifier on september 15, 1947. Any good ge or rca 12ax7a or 7025 should give you nice, fat tone.
We carry a vast number of 12ax7 tubes to help you get the right sonic from your gear. The reason the 7025 valve is used so much is because its actually two identical valves in one envelope. Drawing load lines rob robinettes car and tube amp website. We recommend this tube for the 1st gain stage and as input tube. No microphonic issues even with the most sensitive preamps. Versalink b7025 all in one printer pdf manual download. Plotting the load lines for a pentode power tube used in a class ab pushpull amp like the fender 5e3 deluxe is a little more complex than plotting the load lines for a triode. The 7025 is an industrial version of the 12ax7 and will work anywhere a 12ax7 is used. For your convenience, all of our downloadable literature, media, drawings, and quotes sheets are available for immediate access in one location. It is designed for service as an audio voltage amplifier or phase in verter. Warranty information and return policy warranty period. Military versiondrop in replacement for the 12ax7, but is actually different.
If you download the manual and still have questions, you can reach brothers support line at 8772768437. The tad 7025 highgrade can replace any ecc83, e83cc, 12ax7, 12ax7a, 12ax7m, 12ax7wawbwclpseh, 5751 or 7025. It upgrades 12ax7a and ecc83 tubes and replaces e83cc tubes. The tad 7025 wa delivers full gain with smooth top end. Idt7025 easily expands data bus width to 32 bits or more using the masterslave. The unit is designed so that closure, heating and pressurization can be achieved quickly. The only claimed changes are lowered hum, lowered noise and microphonics in some. The 12ax7 was originally intended as replacement for the 6sl7 family of. Stainless steel, special steel, compressor blading, turbine blading, superalloy supplier. Model 7025 crane section 1crane specifications section 2crane reference section 3replacement parts section 4general reference iowa mold tooling co. Electro harmonix has released the allnew 7025 model and its quite a departure from their previous offering.
Ill have to go through my tube stock to check rca and ge 7025s versus the 12ax7s, but with sylvania 7025s v 12ax7s there is an entirely different plate and grid support structure as well as plate material. Shuguang beijing vacuum tube datasheet analog metric limited. Unless you can find brand new 7025s made 50 years ago, the 12ax7, ecc83 and 7025 are basically all the same tube. It is popular with tube amplifier enthusiasts, and its ongoing use in such equipment makes it one of the few smallsignal vacuum tubes in continuous production since it was introduced. Mullard phillips 12ax7 ecc83 7025 tube vintage nos used tested.
The idt7025 is packaged in a ceramic 84pin pga, an 84pin. The 7025 wa supports a fat midrange and creates a bold tone with lots of overtones. The 12ax7, also known as ecc83, is a vacuum tube that is a miniature dual triode 6av6 with high voltage gain. Free pdf ebooks users guide, manuals, sheets about. Make offer strong rca by ge short gray plate o getter 7025 tube 98104.
In technical terms, the 7025 valve is a dual high gain triode. View and download xerox versalink b7025 user manual online. Brother dcp7025 user manual download pdf format this brother laser printer users guide is a product download and the download link is provided in. This tube is an excellent choice for warm clean tones and creamy overdrive. Original rca 7025 and 12ax7 preamp tubes the gear page.
Harmonically rich, with a detailed low end and a warm high end. This tube is a reproduction of the highly regarded and sought after mullards from the 1960s. The 12ax7a is the perfect fit for the fender 5f6a, it is the original tube specified for the 5f6a. The model 7025 pressurized consistometer is simple to operate with all of the operational controls conveniently located on the front panel. Comparing the mid50s long blackplate rca 12ax7 not the original that rca first made in 1947 to the short grayplate 7025. It was designed for use in high fidelity audio circuits. This is according to the rca receiving tube manual. I cant really offer much help on the new production tubes, but i do know my way around nos tubes pretty good. Preferred series 7025 datasheet pdf download adobe acrobat pdf reader. Preferred series tubes combine the best of everything that has to offer. Thanks to its design it also peforms with very low noise and microphonics. Clearly this was new from the ground up and not a reworking of something else.