Its when they are driven by feeble 58ma driver tubes that the characteristic 45, 2a3, 300b, or 845 signature appears. Much depends on the amp design that the tubes are in, but the 300b tends to be known to have plenty of bottom end and higher power at 8 watts, and the 2a3 is more famous for transparent detail with less power at about 4 watts. The obsolete tube data booklet for the the 539c is the same for the ks157501. Antique radio forums view topic hickok ks15750l1 tube data. Substitutes are given as a guide only please refer to original manufacturers data sheets to ensure that a substitute is safe and appropriate for your application. The schematic is from the book build our own audio valve amplifiers by rainer zur linde. N2a3 4 421 04 5001 00 r22 charging chart find the required subcooling temperature on the unit rating plate. Tube amplifier project page after restoring a nice old 1938 sparton model 1568 console radio, i was so impressed with the quality of the sound that i started looking into building an amplifier using the same 2a3 output tubes that the big console uses. Up for sale will be one matched pair 2pcs of shuguang treasure vacuum tubes 2a3c z substitution of 2a3c 2a3b 2a3 2a3c t, packed in environmental protection box as picture shown, product of shuguang electron group. Tube 0a3 or rohre 0a3 id4072, voltage regulator, single, octal int.
Shuguang is the oldest and largest tube manufacturer in china, established in 1958 by engineers educated and trained in the united states in the 3040s. While it fared reasonably well with the vp20vp16 and badly with the mp 2a3c, the perfectly matching tube amp was still to be located. This 2a3 singleended triode set tube amplifier uses a ef86 input stage and a solid state power supply. Ffx the topoftheline 2a3s, some considered it as the best compact stereo 2a3 set amp available on the market, also our bestseller. Theshuguang treasure as a result of shuguangs 50year of expertise in vacuum valve design and production. Many of these didnt sound any better than the chinese made 2a3s. As of 3505, i have finished scanning the general section, receiving tubes part 1, receiving tubes part 2, miscellaneous, specialpurpose receivingtype tubes, thyratron, ignitron, and glowdischarge tubes, and most of the. Meixing mingda mc300a 300b tube amplifier hifi exquis. I like jj for power tubes but the ruby is perfect for the rectifier. I have more than 100 pieces, most of them were made in 60s and 70s, this batch is from 1962 complete tube data is in every single box, like big transmitting us wwii tubes. Technical support manual split system air conditioner.
The wide glass tube envelope is 28 mm in diameter, and excluding the io base pins is 76 mm tall. Uses the triode 2a3 power tube driven by the 12ax7 tube. Sep 15, 20 just purchased a 2a3 seth with old electro harmonix tube, i want to update them. This data is scanned and may contain errors caused by the ocr software. Jj 2a340 by srajan ebaen shuguang supertnt 2a3b tubestubes asylum by nickchua new 2a3c. The circuit requires careful construction because the direct coupling design allow dc and ac signals pass to the grid of the 2a3 tube. The 5y3 is a mediumpower directly heated fullwave rectifier vacuum tube introduced by rca in 1935. Much depends on the amp design that the tubes are in, but the 300b tends to be known to have plenty of bottom end and higher power at 8 watts, and the 2a3 is more famous for transparent detail with less power at. I am working on scanning and placing on this page the entire rca hb3 tube manual. I have more than 100 pieces, most of them were made in 60s and 70s, this batch is from 1962.
It will continue to be sold and built, carried over from the mk2 design it is perfect tone, performance, and measurements and we do not wish to make any possible change to the unique voice of the ffx. Shuguangs vacuum tube production accounts for the worlds 40% total tube output nowadays, either under their own brand shuguang or under oem brands. Double triode, 6h8c datasheet, 6h8c circuit, 6h8c data sheet. It has found wide use in tube radios and early guitar amplifiers of the fender champ type.
Use the closest column on the chart below 5, 10, 15, or 20. Technical data is provided with limited rights only as provided in dfar 252. The following list shows the tube types i have entered in my database, with exception of the service types e. A friend with a massive tube hoard pulled at least a dozen nos in boxes never opened 2a3 tubes. The tubes supplied with the amp seem to be very low quality the two 2a3 power tubes differ by more than 12 in height so clearly, quality control at that particular tube factory is lacking. As of 3505, i have finished scanning the general section, receiving tubes part 1, receiving tubes part 2, miscellaneous, specialpurpose receivingtype tubes, thyratron, ignitron, and glowdischarge tubes, and most of the transmitting tubes, as well as all. Click to see all 6sn7 6sn7gt 12sn7 12sn7gt in stock. A wide variety of 2a3 tube amplifier options are available to you, such as 2 2. I use this design in my new single ended 2a3 tube amplifier. In other words, youll get loads of that 300b sound if all youre using is an rccoupled 6sn7. While it fared reasonably well with the vp20vp16 and badly with the mp2a3c, the perfectly matching tube amp was still to be located. Tube 2a6 or rohre 2a6 id2650, double diodetriode, 6pinbase u6a, old, usa and shown.
You can also choose from home amplifier, professional amplifier 2a3 tube amplifier there are 98 suppliers who sells 2a3 tube amplifier on, mainly located in asia. I usually tend to use 5u4gbs as the rectifier when needing a high current tube rectifier and account for the larger voltage drop with the correct transformer however the 5ar4gz34 is a good tube as well. Russian 6p3s, 6p3se 6n3c, 6n3ce general tetrode, used in output stages of low frequency amplifiers. Russian tube 5c3s is a quality equivalent of the 5u4g. Meixing mingda mc300a 300bn tube amplifier hifi exquis signelended integrated 300b triode lamp amp technical parameters. Moving on to clearwater, the 2way, 4ohm, 89db speaker. Quality soviet svetlana hiend output triode 6s4s 6c4c. For more equivalents you can use the search warning. Up for sale will be one matched pair 2pcs of shuguang treasure vacuum tubes 2a3cz substitution of 2a3c 2a3b 2a3 2a3ct, packed in environmental protection box as picture shown, product of shuguang electron group. The 5ar4 and gz34 is an indirectly heated cathode tube which means it takes longer to warm up. Mc300c use two level driver to assuer the 300b sound quality, famous 6n8p6sn72, 12at72 psvanes 300b2, rectifier use chinese 5z3p1, it can be replaced by 274b or 5u4 etc to improuve the sound quality. Decided to order the ruby and it was perfect in both sound and feel. Vacuum tube 5ar4, ruby tubes antique electronic supply. I put a jj 5ar4 in it and didnt like it at all it was harsh sounding and stiff.
It is virtually identical, electrically, to the older fourpin type 80 tube, but with an octal base. Singleended triode set 2a3 tube amplifier schematic. Russian tube 5c3s is a quality equivalent of the 5u4g, u52, 5z3, 5as4, 5z10. Add or remove refrigerant until both the liquid line temperature and liquid pressure agree with chart data. Tube type list the following list shows tube types i have entered so far in my database. Even with the more powerful audio space pre2nova m34 combo, somehow everything remained softened. T surroundin gs rate of heat transfer q by conduction along a straight bar of. Foreign types american substitutes 108c1 0b2 10c14 19d8 10f18 ec7 10f9 12ac5. Us version mp 2a3c uses 12ax7 and 12au7 tubes autobiased. I dont have necessarily data for all these types but i also have many data for types not listed.
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