6u8 tube substitution book

Bold designators are close or identical, italic designators are different ratings, different pinouts or different filament voltages. The equivalents for thermionic valves or vacuum tubes, including the diode, triode, tetrode, pentode. If you have you probably understand my interest in a. This base reference gives a quick way to find which tube used the same pin connections. You dont get data on late tubes like the 6au6, 6u8, or television sweep tubes. Have you priced a matched pair of 6jb6s for your drake. I want to thank barney wooters for much of the information contained in this article. To buy 6l6 metal can to buy 6l6g to buy 6l6gc pentode to buy 6l7 and 6l7g heptode for collins 75a1 1950s to buy 6lb6 beam power tube to buy 6lb86jt8 to buy 6lc8 to buy 6le8 6lf66mh6 beam power tube 6lx66lf6 6lf66. You find that a circuit uses a expensive tube that you cant afford. How to use this chart for tube substitution tube substitution is difficult without special books on it. In addition, marine operators, microwave repair technicians, tv and radio technicians will find the handbook to be an invaluable reference tool. Tube substitution handbook by howard sams and a great selection of related books, art and collectibles available now at. We have various us and european brands on hand, but have enough to match for brands and.

To prevent damage to equipment, it would be wise to double check with a good tube manual before actually doing a substitution. Hi guys, could i please ask the tube cognoscenti whether the 6gh8a is a good substitute for the 6u8a in the collins gear, particularly the s line equipment. 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. Founded by albert einstein and harry truman after wwii, eureka is home to the greatest minds in science and technology. You have a tube type 6u8a in a receiver mixer and you do not have a replacement in your collection of goodies. The 6u8 a is the one tube i could do without in my life. I have to admit it frosts me as to why, and id really like to know why there are so many interchangeable tubes with minuscule differences in characteristics. Free vacuum tube data sheets free vacuum tube substitution. Lists rca preferred tube types both receiv ing and nonreceiving by function. If you want a more permanent solution it is not a very big job to rewire the tube socket to use 6u8 tubes. Another great substitution is replacing the 6550s in 800 marshalls with the jj kt88s. Franks electron tube pages foreign substitutes for american types this data is scanned and may contain errors caused by the ocr software. Its a town of geniusesand now its the smartest series going.

Ei ecf802 6jw8 former yugoslavia matched pair 6u8 6gh8. We carry all of the major brands in nos, vintage and new production vacuum tubes. This ne w t ube s ub stitut io n guidebook tube substitution. This 1960 tube caddy below book also includes all tube numbers from all over the world. 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. Tubes in the tube column are directly replaceable with tubes in the replacement column. I do not have experience with buying 6u8s, but it seems that nos 6u8 tubes are more plentiful than 12ax7, 12at7, 69226dj8 and thus priced lower. Raytheon radio tube data and substitution chart by. This is a list of vacuum tubes or thermionic valves, and lowpressure gasfilled tubes. An aid in the selection of tube types for new equipment design. The design purpose was in vhf radio and television between 80 mhz to 220 mhz. In the early 60s sylvania published a tube manual with a back section devoted to basing diagram references.

Tube cross reference numeric nostalgic kits central. Vacuum tubes replacement substitutions tables electronic. I love and appreciate tube based audio gear and own sixteen pieces of tube gear between my two reference systems. Open library is an open, editable library catalog, building towards a web page for every book ever published. Adaptor circuits in the back of this book may help.

Th e composite tube s ubstitu tion g uid eboo k co ntain s 5 100 receiving tube s ub sti tu tions. The valve would be used as a mixer with the triode as local oscillator. As a audio amp a 6ab4 can be subbed for the 6c4, probably isnt the best choice in some rf circuits. That could be useful if you find an old tube and wonder if it could become a receiver. Rca interchangeability directory of industrial type electron tubesid1020b 1078 x pages. This topic came up on the collins reflector some time ago with one fellow insisting they were no different than any other tube. Thankfully, there is a solution by implementing a simple wiring change and substituting the. Please give your contribute add a tube to this list. The oddmix vacuum tubes replacement substitutions tables section has a wide variety of popular tube substitutions for rare antique, vintage, exotic, original, discontinued and collectors vacuum tubes, electron tubes, audio tubes and fleming valves. The 6u8a is a triode pentode by designation but is constructed as a beam tetrode. The kwm2a uses a bunch of them, and theyve never seemed to last worth a damn. Tube substitution handbook will be useful to antique radio buffs, classic car enthusiasts, ham operators, and collectors of vintage ham radio equipment.

Please sit back, relax, and read about these extreemly rare ecf802 series made for critical sonic military to scientific medical applications in germany in the late 1960s. Most have gold plated pins, but many sylvania manufactured 6922s have steel pins a few sylvanias are gold pin. A few specialquality tubes did not have a standard equivalent, e. A lot of 6u8s hum from heater to cathode leakage in the pentode section, old tungsols usually do not.

Kevin, most folks recommend the 6ea8, but some folks say that the 6gh8 works fine, too. I think you might make the substitution of ecf826u8 for 6an8, but, like steerpike says, you would have to rewire the tube base. Print page need 6u8 or 6u8 substitute info the am forum. The ultimate tube substitution guide by charles kittleson, january 1, 1998, vacuum tube valley edition, paperback. This is a suitable replacement for any 6u8a tube type. Intended for 450ma series heater connection in american television sets. If solder joints are all painted, you will know that unit is unmolested. It is quite possible that we have the tubes under a different substitute number.

Inside is tube data of all raytheon tubes including electrical characteristics, basing connections, style and size of base, style and size of bulb as well as recommended. The 6gh8 family of tubes sound just as bad as the old 7199s. The 6gh8 and other 9ae base tubes is almost exactly the same tube except a small difference in pinout. The 6u8a is the one tube i could do without in my life. If you swapped out the 6u8s you wouldnt need to rebias your output tubesso its a painless upgrade. In most cases the tubes manufactured to the european system have an exact equivalent tube in the american system and vice versa.

Raytheon radio tube data and substitution chart by raytheon manufacturing company this was originally published in 1945 and this is a high quality reprint of the original. Shop our great selection of 7199, 6gh8, 6u8, 6ea8 tubes now. I dont know, i can only tell you what people say in the archives of the tube asylum, which you can search yourself as well. It has a very smooth sweet breakup just like the jj el84 and it will breakup a couple decibels earlier. Sometimes the solder joints are painted with red paint at the final inspection. Barney developed the circuit values, and has used and proven the circuit in his own restorations projects. These tables below provide a convenient way to check if a. You can use acrobat for viewing and printing pdf files.

Without a thorough knowledge of tube types and their substitution possibilities, you may be overpaying for your new or. 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. The 6u8a differs from the 6u8 mainly in the fact that the heating time is tightly controlled. The guy in the link below says you can do a direct sub with a 6u8 for a 6gh8 so if you have the adapter according to him you can. The 6j5 is half of a 6f8g, 6sn7 or 6cg76fq7, also there is a 6c5 that is very similar to the 6j5. The jj el844 is an entirely new tube that dissipates 9 watts and is a drop in replacement for el84s in most all amps. Those tube adapters work great and that tube substitution works just fine. My favorite tubes and their substitutes by robert h.

Ei ec900 6ha5 6hm5 former yugoslavia triode lot of four 4 tubes nos. Similar to 6u8 with controlled heater warmup and increased heater to cathode voltage. This manual tells what radio receiving tube will substitute for another and work as a replacement. According to my tube caddy substitution book dated 1967 you can use in place of a 6sk7 6ab7,6ac7,6sg7,6sh7 or 6sj7 with no problem. Find a tube listings in a 50s, 60s, 70s or early 80s arrl handbook the mid 60s and 70s are the most complete and look up 6u8 note below. 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. Becoming an engineer supplier directory books events. The ultimate tube substitution guide january 1, 1998.