Vacuum tube 5y3gt, sovtek antique electronic supply. They were usually branded as mullards or amperexes but made by mullard. Antique radio forums view topic 5y3 substitute for 5z4. Ez80 or ez81 rectifier, you can run them from the 6. Tube 5y3 or rohre 5y3 id3114, fullwave vacuum rectifier, octal int. Sep 09, 2007 my anthem has originally had a 5ar4 but came with a jan 5y3gt in the power supply. The mesa 5y3 is a true, authentic 5y3 nos new old stock equivalent modeled after the original phillips 5y3 and is built to our exacting specification for use in our lone star special this tube produces a sultry vintage sag, creating a silky, smooth feel on the strings and provides the most sag of all of our rectifier tubes. Increasing the cathode bias resistor is often necessary. Its bright, but the top seems rolled off and is not ice picky. Is a 5u4 rectifier tube warmer sounding typically than a 5y3. Double anode rectifying tube 5y3s is an octal rectifier diode with a true directly heated cathode. With these improvements, the iconic amp and tone was born.
With the introduction of the new 12ay7 and 12ax7 preamplifier tubes replacing the two 6sl7 metal tubes, by 1957 the power output was brought to 15w into a 12 jensen alnico speaker. The 5u4g is no longer the tube of choice for new mesa amps that feature a 5u4 type rectifier tube. In 1953 the name changed to champion 600 with a 6 speaker replacing the original 8. Also i think the evm has a certain thickness in the mids that i may not care for. The jj electronic 5y3s is a ruggedly built octal rectifier tube with a directly. The use of passive filters to reduce the harmonic content ripple of the. This makes them good substitutes for the other rectifier types when different output voltage is. Calibration and testing of the hickok model 600600a tube. Vacuum tube 5y3 s, jj electronics, rectifier antique electronic. This vintage russian 54 5u4c rectifier is a 5z4 equivalent. Youll need a burned out tube, and 4 diodes 1n4007, 1n5403, etc. The 5y3 is a mediumpower directly heated fullwave rectifier vacuum tube introduced by rca in 1935.
I asked if it could be switched to the 6x4 and the said yes. Connect the scope probe to pin k, the center tap of the power transformer winding for the 5y3 rectifier filament and reapply ac power. The 5z4, like the 5v4 and 5ar4, has a cathode sleeve tied to the heater. Sorry to create a bit of confusion in the first post about rectifier tubes stray capacitance doesnt have much if anything to do with creating voltage drop itself but this stray capacitance and how the rectifier tube deals with it incircuit is huge as far as. The sovtek 5y3gt tube is an indirectly heated fullwave rectifier tube intended for rectification in general purpose audio equipment. I have produced an effective solid state replacement for the 83 mercury vapor rectifier tube a hazardous waste item today and the 5y3 rectifier tube for use in hickok tube testers. Vacuum tube 5y3gt, sovtek octal rectifier tube max dc output current. Solid state rectifier for 5ar4, 5u4, 5y3 tubes antique.
The circuits that use a 5y3 rectifier tube require a transformer with a 5 volt 2 amp winding for the tubes filament. Adjust the scope as before to display the 120hz pea ks, and observe the screen bias voltage. The 5y3, for example, requires 5 volts at 2 amperes to heat its filament. If you cant find or dont have a transformer with a 5 volt winding one of the 6ax5 circuits may be for you. Always check the bias and idle power of the tube with the new rectifier to be certain that it is running within spec. Solid state rectifier direct plugin replacement for 5ar4, 5u4 and 5y3 rectifier vacuum tubes in amplifiers with center tapped secondary power transformer. Feb 24, 2019 attic find vintage tube amp tube gurus, schematic. Tube 5z3 or rohre 5z3 id3242, fullwave vacuum rectifier, uxbase 4 pins 2 thick, usa 1924, ux and powersupply shown. They are both tube full wave rectifiers but they are not wired the same. Provided in this pdf document link above contains technical descriptions of key parts which you need to understand before you make a final. Tube substitution guides recommend a 5v4 to replace the 5z4, but they dont recommend a 5y3 or any other filamenttype rectifier, even though their current ratings are not grossly different. Replacing rectifier tube with silicon diodes antique radio.
Tube rectifiers need filament power to thermally stimulate electron flow. The two toned vinyl remains, however some of the later. This makes them good substitutes for the other rectifier types when different output voltage is desired. Rebiasing of your power tubes is absolutely required. It had one 6sj7 preamp tube, a single 6v6 power tube, and a 5y3 rectifier tube.
Frank philipse pocnet mirror patrik schindler 5y3gt. It has a 140 ma maximum output and filament voltage of 5 v and a filament current of 2 a 0. I thought of trying the 5v4 but feel it might raise my. Can i use 6x4 instead of chinese 6z4 for rectifier. Diode rectifier vs tube for class a amp telecaster. Please see the substitutes at the top of the page for more details. Sep 29, 2014 this means you can use most octal rectifier tubes, but each will yield different results. Due to tall coke bottle design, this tube may not fit in all amplifiers. The 5y3 is a mediumpower directly heated fullwave rectifier vacuum tube introduced by rca.
It had two 6sl7 metal preamp tubes, two 6v6 power tubes, and a 5y3 rectifier tube. This is the tube that came in almost all blackface amps with a rectifier tube, some brown amps that came with a rectifier tube, and the tweed bassman and twin. The silver print on the has the otk inspection stamp. Calibration testing of the hickok model 800800a tube testers. Octal rectifier tube max dc output current 125 ma an indirectly heated. Substituting a solid state rectifier in these cases lets the amp start working at lower voltages. Just make an adapter and use a 5y3 which is the same tube in a different base. I was looking at a supply this past weekend that used the 6z4 and the 12at7, 12b4a. Along with an 8 speaker, it was covered in two toned brown and tan vinyl and was beautiful to behold.
The effects on the rectifier behaviour of the inductive components of the load and of the ac line will be investigated. Welcome to tubedepot javascript must be enabled to use this site. Rectifier comparison and interchangeability chart kca. Since each plate of the selenium stack could support about 30 volts, you will typically find 5 or 6 plates in a 120 vrms rectifier. All high voltage windings have been specified as the full voltage followed by the letters ct which stand for center tapped. However the manual states this tube the 5ar4 may be replaced with the 5y3 rectifier tube. I believe this is one of the reasons the amp lost some of the sound and touch sensitivity you enjoyed.
What links here related changes upload file special pages permanent link. Sep 01, 2015 sovtek 5ar4 sov rectifier vacuum tube, single. You can now replace either tube, or both with reliability and the knowledge that the operating values will be within the. The 5y3gt is a filamentary twindiode designed for fullwave rectifier operation in power supplies. Guitar world magazine increase amplifier flexibility guitar player magazine thank you. I would have to put the old tube in and record myself to see if there was a difference in volume ill. It is virtually identical, electrically, to the older fourpin type 80 tube, but with an octal base. I found one site that lists it at 140 ma but does not spec the voltage above a real 5y3. My anthem has originally had a 5ar4 but came with a jan 5y3gt in the power supply. I have a sovtek 5y3 in my 6g25e3 build it did raise the b a bit. Or, if your tube socket has all 8 pins present you can just add 3 jumpers, one each from 34, 56, and 27 and then either tube will work. The circuits that use a 5y3 rectifier tube require a transformer with a 5 volt 2 amp winding for the tube s filament.
You may have to fiddle with the bias resistor to get the bias adjustment into the right range for 6v6s. Here you will find our collection of mcintosh tube amplifier schematics. You can use acrobat for viewing and printing pdf files. Octal rectifier tube max dc output current 125 ma an indirectly heated diode intended for rectification of commercialfrequency alternating current. Do you have a vintage mcintosh hifi tube amp that needs repair or modifications. In addition, when changing to a higher output rectifier in a self biasing aka cathode biased amp, eg, champ and others never assume that the power tube s isare safe. This means you can use most octal rectifier tubes, but each will yield different results. Rectifier tubes tagged 5ar4 gz34 5r4gy upscale audio. This slowrise, indirectlyheated rectifier should be considered an upgrade for a 5y3 tube in most circuits, and will drop slightly less voltage. This tube gives the least sag of all rectifier tubes mentioned here. They produce a similar voltage drop to 5u4 rectifiers but require only 2 amps of heaterfilament current from the power transformer as opposed to 3 amps for a 5u4. Put the tube in the tester and set it up for the standard 6l6 test.
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