You should consult the manufacturer of your equipment too if there are questions. If the set is designed to work the rectifier to the peak plate current as it seems that many sets are, it doesnt take much to nudge that current into the red zone and cause the tube to short. Rectifier tubes having only one plate and one cathode, such as the 35w4, are called halfwave rectifiers. Jun 10, 2016 the type 80 tube uses what is known as the ux4 base and as long as i select another fullwave rectifier with the same pinout and base requirement i shouldnt have any trouble. The other thought i had is that it could be a 5u4g tube. This makes them good substitutes for the other rectifier types when different output voltage is desired. If it is a russian tube, it isnt the same as a 5u4. 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.
For power rectification from very low to very high current. Tube 5u4g or rohre 5u4g id3352, fullwave vacuum rectifier, octal int. The adjustment to the new operating point via a change in rectifier tube type is attributable to the differences in voltage drop between the two rectifiers. 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 affecting the overall sound of various rectifiers. From table iii it is apparent that a 5u4g fullwave rectifier tube will easily and economically meet these requirements. Always check the bias and idle power of the tube with the new rectifier to be certain that it is running within spec. The jj gz34 5ar4 is a good and reliable rectifier tube suitable for use in both guitar amps e. Tube 0z4 or rohre 0z4 id4085, fullwave coldcathoderectifier, octal int. Welcome to the tube data sheet locator, a popular web resource for finding data on vacuum tubes. Ive rolled a number of nos types over the last three years and am wondering two things.
Rectifier comparison and interchangeability chart kca nos. I dont know where i got this from, but given the discussions of late regarding over voltages, i thought this table of common rectifier specifications might be useful to the forum. The sovtek 5u4g is a directly heated diode designed to rectify alternating voltage in generalpurpose radio equipment. With the introduction of semiconductor electronics, vacuum tube rectifiers became obsolete, except for some enthusiasts of vacuum tube audio equipment. We test our rectifier tubes on a tube tester that tests each half individually to insure that both sides are equally strong. Remove the rectifier tube and install the solid state tube replacement using a variable. This 5u4g tube is brand new nos in original uk military box, and was made at the thorn factory made in the 1950s we only have one piece in stock shown in the picture withd getter and brown base. Welcome to tubedepot javascript must be enabled to use this site. When you change the rectifier tube in an amp, it changes the voltages in an amp. Solid state rectifier direct plugin replacement for 5ar4, 5u4 and 5y3 rectifier vacuum tubes in amplifiers with center tapped secondary power transformer.
A change from a 5ar4 to a different tube might result in more or less sag depending on the efficiency of the tube. This vintage russian 54 5u4c rectifier is a 5z4 equivalent. 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. Rectifier tubes are the diode component within a tube amplifier that converts ac voltage from the power transformer into a dc voltage to amplify sound. Rectifier comparison and interchangeability chart kca. Full text of vacuum tube rectifiers internet archive. Premium nos and modern production rectifier tubes 5u4, gz32, gz345ar4, 5y3, 6x4 and other rectifier tubes. Nov 26, 2014 quick video showing a 5u4g rectifier arcing on startup. Rectifier interchangeability and its relation to clean headroom. The eml tubes feature a series connected filament for both diodes togetherm, which has certain advantages.
Before the development of silicon semiconductor rectifiers, vacuum tube thermionic diodes and copper oxide or seleniumbased metal rectifier stacks were used. This 1960s made tube developed for rugged video application has been found in quantity by upscale audio, in upland, ca. Much like antiques, nos tubes are currently not being manufactured and this means their supply is dwindling while the price continues to rise. The 80 rectifier tubes is intended for radios or small amplifiers.
The new gibson les paul standard 60s is it worth buying. Plate supply voltages are measured with the rectifier tube nonconducting, i. Welcome to tubedepot javascript must be enabled to. The 5ar4 and gz34 is an indirectly heated cathode tube which means it takes longer to warm up. If you can contribute this data pleas email it to me.
From what i have been able to determine the nos mullard i am using first series fat base has different voltage characteristics than other vintage mullard tubes. Limited quantity available, new old stock, not for export. This is the rectifier tube according to kevin deal of upscale audio. We do not know these differences as the 3bs2b tube data is not available.
This slowrise, indirectlyheated rectifier should be considered an upgrade for a 5y3 tube in most circuits, and will drop slightly less voltage. From table i, the peak inverse voltage on the rectifier tube will be 3. 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. Increasing the cathode bias resistor is often necessary. Tube rectification is where sag comes from because a tube cannot keep up with the transient power needs for the amp whereas a ss unit can. The type 80 tube uses what is known as the ux4 base and as long as i select another fullwave rectifier with the same pinout and base requirement i shouldnt have any trouble. Discussion in amp input normal or bright started by working man, may 7, 2014. This military spec chatham 5r4wga rectifier tube has black plates, bottom getters, and a rugged ceramic base. Made jan joint army navy tubes have passed the most stringent of tests uncle sam could require from a manufacturer. I am working on posting the rca hb3 tube handbook on line on this site on its own page. The tube has a straight sided t12 envelope and higher current ratings than the 5u4g. What does nos mean, anyway commonly known as nos, the term new old stock simply refers to tubes that were made years ago but have never been used.
Rectifier tubes 5ar4 gz34 5r4gy tube basics and faq. Not sure if this is a function of the degree to which the rectifier tube can impact the sound or simply that the sonic difference between these rectifier tubes is less significant. One of the best sounding 5u4g fullwave rectifier you can find other than the famed gec u52, and the western electric 274a and 274b. Russian tube 5c3s is a quality equivalent of the 5u4g.
Due to tall coke bottle design, this tube may not fit in all amplifiers. Im mainly interested in what tubes i can replace it with. The 5u4g is no longer the tube of choice for new mesa amps that feature a 5u4 type rectifier tube. Sovtek 5u4g rectifier vacuum tube the sovtek brand of military grade vacuum tubes are made in russia and considered to be among the finest currently available. With a capacitorinput filter, a replacement cap of too large a value can be enough to cause excess plate current due to the oversized surge of. Rectifier tubes this page contains a list of rectifier tubes some of which may be obsolete.
Tubes free delivery possible on eligible purchases. When installing a different rectifier tube, especially from one that gives a greater drop to one that has a lower drop ex. Solid state rectifier for 5ar4, 5u4, 5y3 tubes antique. There are various sources for rectifier tube data sheets free on the net. Buy nos 5u4gb vacuum tubes online, in stock and ready to ship. You should consult the manufacturer of your equipment too if. The westinghouse logo of this canadian valve is clearly seen in the main image. Does anyone have information on 5u4c rectifier tubes. Jun 08, 2015 the new gibson les paul standard 60s is it worth buying.
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