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 database. To see a description of the information available, click on one of the name links below. The difference between the 5r4 and the 5u4 antique radio. According to the tube substitution handbook the following tubes can be substituted for each other. Solid state rectifier direct plugin replacement for 5ar4, 5u4 and 5y3 rectifier vacuum tubes in amplifiers with center tapped secondary power transformer. Theres no denying that the 6bf5 runs hot in those receivers. The difference between the 5r4 and the 5u4 antique radio forums. Discussion in audio hardware started by inperson, jul 12, 2009. There are several different tube numbering systems that you may see on tubes, which generally are a result of where they were built. Single 5ar4 rectifier tube converts ac voltage from the amplifiers power transformer into dc voltage required by the power n and preamp tubes q. Jul 12, 2009 the 5z4 is a chinese tube and i would like to replace it with an old us tube. Vt6301s 88sa8040 samsung plc spc series ibm usa 2001 p6 motherboard service manual pct303a v1456vqlp1 8050m connector ide to. Tubes in the tube column are directly replaceable with tubes in the replacement column.
Other versions used a 5u4, and some had 12at7 phase inverters. While other substitutes may appear suitable, they have not. 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 manual contains only direct substitutions which. 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. This slowrise, indirectlyheated rectifier should be considered an upgrade for a 5y3 tube in most circuits, and will drop slightly less voltage. However i read that 5u4 s and 5r4s are very similiar to the 5z4. This substitution list should be used in one direction only that is, an industrial type to replace a standard type. This one has a lot of pages from the european philips tube manual. The westinghouse logo of this canadian valve is clearly seen in the main image. The entire 1945 taylor tube catalog in pdf format note, 1.
I am curious as to what you all think of tube substitutions, like seen in this rider document. It should be replaced with an identical rectifier tube or one with a comparable rating and quality, although a 5u4 rectifier tube can be substituted to. Substitutes are given as a guide only please refer to original. Cb tube substitution directory 381 replacements for the most popular cb tubes by stephen dedalus, 12w5415 cb rigs have the most uncanny knack of dropping dead at just the wrong moment such as when you are just about to take a long motor trip, or horrors when you are in a small town where the only service shop within 100 miles never even heard of cb. The tube manual specifications, recommendations and curves indicated a significant difference between the two tubes. 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. Mdb ventures offers vaccum tubes and other items for sale. Please see the substitutes at the top of the page for more details. U52 5u4g 5as4a5u4gb fullwave rectifier, octal base. The information in the sylvania tube substitution manual is furnished without.
We also provide free helpful information related to vacuum tubes that can be downloaded from this site. I have a 65 pr and the tube chart calls for a 5ar4 and a 12ax7 phase inverter, not 12at7. 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. They would be used in a 64 tremolux, 62 and 65 deluxe and a 66 princeton. What do the numbers and letters in a tubes name mean. Can i substitute 5v4s in place of the big buck nos 5ar4. 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. The ultimate tube substitution guide january 1, 1998 edition.
A few specialquality tubes did not have a standard equivalent, e. And add to that that the schematics often enough dont actually match the amp and forget about what is on the tube chart. Th e composite tube s ubstitu tion g uid eboo k co ntain s 5 100 receiving tube s ub sti tu tions. This is a list of vacuum tubes or thermionic valves, and lowpressure gasfilled tubes.
When installing a different rectifier tube, especially from one that gives a greater drop to one that has a lower drop ex. In the early 60s sylvania published a tube manual with a back section devoted to basing diagram references. The ultimate tube substitution guide january 1, 1998. Good news is they are still available at the site ive listed below. Crane for of listed ince certain tubes are extremely scarce today ano hard to get even with high priorities, it is becoming increasingly difficult to keep operating. The silver print on the has the otk inspection stamp. I can only find old rusted metal 5z4s at my local tube shop.
You can use acrobat for viewing and printing pdf files. Parts and boxes are lying around in nondesignated areas. How to use this chart for tube substitution tube substitution is difficult without special books on it. This base reference gives a quick way to find which tube used the same pin connections. This ne w t ube s ub stitut io n guidebook tube substitution. Therefore you wouldnt want to take a chance installing a 5u4 in place of a 5r4 even though in some cases it might not overstress the power transformer.
May 26, 2011 the 35w4 and 35w4a are the only half wave rectifier tube of its type as far as pin configuration and filament resistance for a series type line operated tube radio. At the bottom of this page youll find some links to other tube datasheet sites in case you cant find what youre looking for here. I dont remember the model number of mine, but its i think its one that they only made for a short time. This sylvania manual would not replace a sams or rider substitution guide, nor would a sams or rider guide replace this manual. It would be used for all types of medium power equipment and was used extensively in 1940s equipment. 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. Tubes 5u4 gb twin diode for fullwave power rectifier applications 5u4 gb ett1255 page 1 156 description and rating the 5u4 gb is a filamentary twin diode designed for use as a fullwave rectifier in the power supply of television receivers or other. Indianapolis new york cnr\a\p original from a by vuuglc cornell university to replace use 16a8. This needs to be checkedadjusted when you change this tube.
The tube manual specifications, recommendations and curves indicated a. Solid state rectifier for 5ar4, 5u4, 5y3 tubes antique. Any time you change the rectifier tube to a different type, you should have the amp biased. Substitution of a directlyheated rectifier tube such as the 5u4 is not recommended except in an emergency as the soft startup feature will be lost and capacitors and tubes subjected to high transient surge voltages until the tubes reach their operating temperature. The ultimate tube substitution guide by charles kittleson, january 1, 1998, vacuum tube valley edition, paperback. We are not responsible for any malfunctions of equipment due to inaccuracies in these tables.
A recent thread on the collins e mail reflector suggested the possible substitution of a 6aq5 in place of the 6bf5 audio output tube to reduce heat generation. Just looked thru my ge tube books and it offers no substitution for the 5z4s. Please ask us if theres a question we havent answered here 1. In most cases the tubes manufactured to the european system have an exact equivalent tube in the american system and vice versa. Unique tube substitution manual,totally different from the sams or riders stuff. Mdb ventures vacuum tube and related information page. This list is constantly and perpetually under construction. I try to concentrate on popular andor readily available tube types. The information below is accurate to the best of our knowledge. Highvoltage considerations for television picture tubes, picture. 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. This makes them good substitutes for the other rectifier types when different output voltage is.