The ultimate tube substitution guide january 1, 1998 edition. The starting volatge is 425 volts from a diode rectifier and each tubes specs drop from there. Co mb ines i n one volu me the con tent of th e bas ic book and suppleme nt s i thro ugh iv. Vacuum tube 5u4gb, jj electronics antique electronic. This manual tells what radio receiving tube will substitute for another and work as a replacement. Substitute 5v4g tube for 5ar4 tube audiogon discussion forum. The following items can be substituted for this product. It rates all recommended substitutions as either excellent, good, or poor.
Replace rectifier tube with solid state diodes youtube. A tube that gives lower voltage may not be able to handle the current of. 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 for 5ar4, 5u4, 5y3 tubes antique.
Solid state rectifier for 5ar4, 5u4, 5y3 tubes antique electronic. The owners manual of the referenced components states that the 5v4g tube can be used in place of the 5ar4 tube but to expect sonic differences. As for a suitable replacement, the 5y4g has same specifications as the 5y3g but with. It has found wide use in tube radios and early guitar amplifiers of the fender champ type. However the manual states this tube the 5ar4 may be replaced with the 5y3 rectifier tube. Tube can be replace with 35y4,but you need to redo the filament,cathode and plate connection to fit 35y4. The more of a voltage drop dcv drop you have the more sag or compression you will have. The rectifier socket can even be wired such that it accepts both tube. The 5y3 is a mediumpower directly heated fullwave rectifier vacuum tube introduced by rca. To prevent damage to equipment, it would be wise to double check with a good tube manual before actually doing a substitution. I try to concentrate on popular andor readily available tube types.
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. Used in many hifi and guitar amplifiers, jj delivers a robust and solidly built tube. Try searching the tube data sheet locator, the worlds biggest index of tube datasheets other pages online with tube. We are not responsible for any malfunctions of equipment due to inaccuracies in these tables. Free vacuum tube data sheets free vacuum tube substitution.
I would hold the tube you are considering in the same light. This substitution list should be used in one direction only that is, an industrial type to replace a standard type. Vacuum tube 5u4gb, jj electronics antique electronic supply. Rectifier comparison and interchangeability chart kca. Antique radio forums view topic can an 80 tube replace a 5z3. Unique tube substitution manual, totally different from the sams or riders stuff. 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. Replacement for all 5u4 types, including nosstyle big bottle tubes. Still digging through some of my old stuff and came across this chart i thought i would share. My amp is used 5ar4gz34,can i replace with 5u4g or 274b.
We have general electric usa, not ukand rca recieving tube manuals for sale, as well as the rca transmitting tube manual tt4, and a book of data on western electric tubes. Substitutions were often made using lists such as this one by richard crane published in the april 1945 issue of radio news. Free shipping on many items browse your favorite brands. This ne w t ube s ub stitut io n guidebook tube substitution. With the very large number of vacuum tubes or thermionic valves that were produced and as a result of the multiple vacuum tube numbering systems that were in use, there are generally equivalents for most types of tube. Rectifier comparison and interchangeability chart kca nos. The ultimate tube substitution guide by charles kittleson, january 1, 1998, vacuum tube valley edition. Jul 12, 2009 5r4 or 5u4 replacement for the 5z4 tube. If the equipment is already designed for an industrial tube, a standard receiving tube will not usually work as efficiently or as long as the original. Im sorry i cant answer the original question as im on the road and my tube manuals are at home. For 5ar4, subs listed are gz34, 52ku, 54ku, gz30, gz32, gz33, gz34, gz37, r52, u54 and u77. Tube 5u4g or rohre 5u4g id3352, fullwave vacuum rectifier, octal int. Converts most audio amplifiers which use a vacuum tube rectifier 5ar4, 5u4 or 5y3 to this solid state device.
In addition to the data i have scanned and posted, if youre looking for data on a particular tube you should visit tsdl on duncanamps website, or franks tube data. I will sub a 5v4 temporarily in tweed 6l6 amps to get a little sag and lower headroom studio, small venues, but not as a permanent sub. The starting volatge is 425 volts from a diode rectifier and each tube s specs drop from there. The information below is accurate to the best of our knowledge. Made jan joint army navy tubes have passed the most stringent of tests uncle sam could require from a manufacturer. Antique radio forums view topic tube substitution guides. While not necessarily exactly the same, they will function as replacement items in your. Based on your description, your super xii should look like the sample in the scott news for. However, some things must be considered when changing rectifier tubes. Maybe im getting testy in my old age, but it really annoys me to read that substitutes for a 6sq7 are. This yellow jacket is a solid state device and as such does not come with a vacuum tube.
It would be used for all types of medium power equipment and was used extensively in 1940s equipment. If this tube you have has a current draw of 200ma, it is closer to the gz345ar4 sepc of 175ma than is a 5u4, but i still would not advise using it in place of a gz34. This list is constantly and perpetually under construction. Solid state rectifier direct plugin replacement for 5ar4, 5u4 and 5y3 rectifier vacuum tubes in amplifiers with center tapped secondary power transformer. The 5y3 is a mediumpower directly heated fullwave rectifier vacuum tube introduced by rca in 1935. Tube 5u4gb or rohre 5u4gb id3775, fullwave vacuum rectifier, octal int. My anthem has originally had a 5ar4 but came with a jan 5y3gt in the power supply. Vacuum tube and valve cross reference sub substitute substitution equivalent and replacement list. Increasing the cathode bias resistor is often necessary. The former has the filaments at 7 and 8 and the latter at 2 and 7. A great reference book for when you need to know what a certain tube does and its specifications, its like a collection of tube datasheets, nothing more, nothing less. Sockets which are wired for the 5u4 can be very easily rewired to accept the 5x4. Its not a book that you would read cover to cover, but rather have it on the shelf for when its. Still i would try to find an old tube guy that knows this piece and can verify tube subs before proceeding.
The westinghouse logo of this canadian valve is clearly seen in the main image. I am working on a ge k126 that the schematic calls for a 5z3 rectifier tube and there is an 80 tube in its place. Therefore, i do not substitute a 5u4 tube in a gz34 application. While the plates of the 5x4 connect to pins 3 and 5, the 5u4 has the plates brought out to pins 4 and 6. And after losing at least one bf pts to a 5u4, i only use them when the pt is rated for it. Installed height of 4 18 other jj electronics tubes 5u4 tube types. Free vacuum tube data sheets free vacuum tube substitution guide manuals free radio tube data manuals free tube base diagrams. This list is biased by the tubes that i have encountered during the repair of the many tube amps that have come to my repair shop. This slowrise, indirectlyheated rectifier should be considered an upgrade for a 5y3 tube in most circuits, and will drop slightly less voltage. You can use a european tube in a usa radio for example.
Hi all, the book i have is receiving tube substitution guide book, published by john rider in november 1950. At the bottom of this page youll find some links to other tube datasheet sites in. The tube has a straight sided t12 envelope and higher current ratings than the 5u4g. Get the best deals on marconi nos tubes when you shop the largest online selection at. The silver print on the has the otk inspection stamp. This 1960 tube caddy below book also includes all tube numbers from all over the world. It lists the following tubes as good replacements for the 6k5, all with wiring changes required. The jj electronic 5u4gb is an excellent choice for an economically priced tube rectifier. If no replacement is shown for a particular tube number, there is no replacement and you must use original tube number to replace a defective tube.
Ge essential characteristics book, both tubes 5u4gb and 5as4a have the. Going from one type to another such as 5u4gb to gz34 will give you different tones and different sag characteristics. Tube depot carries a selection of 6cg7 6fq7 pre amp vacuum tubes. Solid state rectifier direct plugin replacement for 5ar4, 5u4 and 5y3 rectifier vacuum tubes in amplifiers with center tapped secondary power transformer use when less sag is desired in the power supply.
Of course if you have 4 amps on 5v winding not 3a you can use 2x 5y3 and. Make offer 5u4g 5u4gb 5u4 tube nos marconi rca nos u52 valve 274a 274b western electric we. To view this site, you must enable javascript or upgrade to a javascriptcapable browser. This is totally the opposite in many ways, describing substitutions that require changes, such as using a different basing tube, tubes that will work with resistance changes in the circuit, etc. It is virtually identical, electrically, to the older fourpin type 80 tube, but with an octal base. The rectifier socket can even be wired such that it accepts both tube types. The information in the sylvania tube substitution manual is furnished without assuming any obligations. I understand the whole reason for going from the 5u4 to the 5ar4 is.
Adaptor circuits in the back of this book may help. He broke open is tube reference book and went down the entire line of 54 valves. Antique radio forums view topic can an 80 tube replace. My tube substitution book shows only an 83 tube to sub in place.
This vintage russian 54 5u4c rectifier is a 5z4 equivalent. This model of yellow jackets converter, the yjr, is an adapter for use in most amplifiers which use 5ar4, 5u4, or 5y3 tubes or other similar tubes. By having this information on a chart you can choose a rectifier tube that will best suit your playing style. Although tube substitution should not be performed indiscriminately, there are numerous occasions. Discussion in audio hardware started by inperson, jul 12, 2009. Substitutions were often made using lists such as this one by richard crane published in the april 1945 issue of radio news with most tubes no longer being made, substitution lists and tube adapters will be of value in the future in keeping tube radios operational. Oct 25, 2005 oddly enough, the prompt tube substation handbook says 5ar4 is sub for 5u4g, but not the other way around. In most cases the tubes manufactured to the european system have an exact equivalent tube in the american system and vice versa. If authenticity is your concern, either would be correct, since it is a factory designated substitution. Philips jan 5u4gb fullwave vacuum tube rectifier, an ideal choice for all tube amplifiers.
Another spot to look, which is especially useful if youre looking for replacement types and tubes with similar bases or characteristics, is the nj7p tube. I found some info advising a 5as4a is a substitute for a 5u4gb. The jj 5u4 gb tube is another affordable replacement rectifier tube for both guitar and hifi tube amplifiers. For me, i rather use diode 1n4007 to do a better job. 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. Vacuum tube 5u4gb, electroharmonix amplified parts. Just looked thru my ge tube books and it offers no substitution for the 5z4s.
Replacing the rectifier tube is a good way to get a different sound from your amp. Th e composite tube s ubstitu tion g uid eboo k co ntain s 5 100 receiving tube s ub sti tu tions. This makes them good substitutes for the other rectifier types when different output voltage is desired. Tubes in the tube column are directly replaceable with tubes in the replacement column.