View Full Version : Tubes (Valves)

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  1. 6EU7 tube
  2. Telefunken Tubes?
  3. Which current production 12AX7 have short plates and spiral filaments?
  4. JJ 6CA7 a better option for 6L6 amps w/ excessive B+?
  5. 12AX7 What is Mu?
  6. Handy List of Links to New-Sensor Tube Data Sheets
  7. Cool old tubes for tone gurus
  8. 5G9 'clone' build question
  9. Blues Junior Buzzing
  10. JJ Tubes 12AX7/ECC83S Hum Problems Anyone?
  11. Off kilter 6v6.. any prob?
  12. Help identifying Hughes & Kettner CM3 Vacuum tube
  13. How tall are kt66 tubes in real life?
  14. Check this out
  15. Are new production EL34's just this bad or is there a problem in my amp I don't see?
  16. So I need some help for a new prototype.....
  17. Probably a really simple bias question
  18. Is JAN Sylvania 6L6WGB under rated the same as JAN Philips 6L6WGB?
  19. Fender pro junior bad transformer and red plating v3 tube
  20. Idea: singleton power tube trading forum?
  21. Aaron C
  22. Data sheet confusion for 12BY7-A
  23. sound city 120 - I may have 'highlighted' a fault !!!
  24. high screen voltage
  25. Preamp tubes with different triodes
  26. Help me Identify these Tubes!
  27. 6F12P
  28. Suggestions for 30-40v power supply for micro tubes.
  29. Laney IronHeart
  30. Matching tubes at home Q?
  31. Guild thunder 1 help
  32. Dropping B+ substantially
  33. tube /valve Biasing
  34. 6CA7 Current Draw Increases
  35. Viking tube radio to guitar amp
  36. JJ 6v6s spare pins.
  37. high gain amp attenuating
  38. Will this output transformer work?
  39. Homemade Tube Tester
  40. Eico HF-20 50's 6L6 UL HIFI amp, convert for guitar or just try to sell it?
  41. 6v6 Grid Bias Circuit.
  42. Bias test points.
  43. Antique Sound Lab 6L6 Tube Up For Adoption
  44. Fender Twin Reverb 65 Reissue 6L6 Tube Replacement
  45. Any new EL84's lately with better reject rates?
  46. Tung-Sol 5881 - Hard, Medium, Soft?
  47. Can someone look over my biasing data to see if I've got it right.
  48. Help with tube data sheet, ecll800
  49. Help with tube data sheet, ecll800
  50. resistors as inrush limiters before full-wave diodes?
  51. Calibrating Tube Testers
  52. 6L6 Build Suggestions
  53. 5R4GY longevity in tube amps
  54. 5U4GB tube rectifier flash
  55. 6j6 & similar...
  56. Re-bonding tube bases
  57. replacing 6w8's with separate pre and output tubes
  58. Replacing 6L6 with 6V6?
  59. One of these things is not like the others...
  60. Russian made Groove Tubes?
  61. Awesome tube tester/curve tracer
  62. Tone stack Mod for Bogen H30
  63. help identifying this tube
  64. 6L6--- which brand best keeps the fenders sound
  65. More Bass/Less Mid mod for a Sovtek Mig 50h
  66. EL84 tubes
  67. Source for 9-pin (preamp) tube bases???
  68. Just used a 16 years old new tubes.
  69. Shuguang 6L6WGC - any info
  70. hardware for blackface fender fix
  71. Model t tubes
  72. Anybody looked at tube perveance values?
  73. Tube Storage
  74. When did the American Tung Sol factory cease production?
  75. New production 12AX7
  76. CE Distribution - policy change coming for defective tubes
  77. Sinorussotubeaphobia
  78. Triplett 3444 testing of a 12AX7
  79. Variations in Filament intensity
  80. Used power tubes
  81. New production Mullard El34's
  82. Origin of the 6L6GC?
  83. Sovtek 6CA7 fat bottle 90s era
  84. ID tubes from 1968 Traynor YVM-1
  85. Thoughts on Tung Sol reissue 12AX7 and reliability?
  86. Plate voltage of NOS RCA and NOS Tung Sol??
  87. Old Sovtek EL34G, similar tube?
  88. Current production Sovtek EL84M
  89. 12AX7 tube for overdriven analog organ
  90. ECC83 clipping
  91. Can KT88's be used in my amp?
  92. JJ 6L6GCs... WTF?
  93. Please suggest KT88 tubes
  94. wurlitzer branded general electric grey plate 12ax7
  95. Power Tube Swap Extravaganza!
  96. need a source for 6KG6A/ EL509 tubes
  97. how long do these last?
  98. What is this tube ID?
  99. Avo valve tester questions.
  100. winged C vs Svetlana el34s?
  101. Mercury Rectifier Tubes
  102. boutique/back yard tube maker in Japan [Youtube]
  103. cathode by-pass in push pull six tube hifi amp
  104. Nuvistors - what do you think?
  105. Bias question - 6L6
  106. Adhesive for Repairing 6V6GT Base?
  107. 5763 Tetrode - what do you think?
  108. NOS Metal Can 6V6 Tube Quesiton
  109. Franks Electron Tube Data Sheets site down?
  110. Tube amps
  111. rf/audio screen voltage ratings
  112. Help with value vintage Line Transformer Altec 2282
  113. Suggest preamp tube (12AX7)
  114. Anyone used Sovtek 12ax7wa - Had one crack
  115. ID this Tube?
  116. what power amp is this and who made it ????need schmatic
  117. Recommendations for EL34 for 520V on the plate
  118. Anyone else having issues with Winged C EL34's?
  119. JJ 5Y3?
  120. Retrovalves
  121. Question For Other NOS Tube Junkies
  122. mismatched 6v6 pairs; cathode bias
  123. Article - Return of the Vacuum Tube
  124. Tube-Based Boiler Controller / Thermostat?
  125. Any experience with this tube vendor?
  126. Blackface Deluxe Reverb No bias current reading
  127. Fender Bassman 10 Bias adjust conversion
  128. Proper Tube Removal Process?
  129. dead output transformer
  130. Shuguang data sheets
  131. Ordered JJ's for my Bugera 333XL
  132. The Tube Shop - anyone shopped there?
  133. Which 12AX7 for my 18 watt plexi build ?
  134. 12AH7A info
  135. Changing tubes in a Crate vc5310
  136. Winged C 6L6GC + TubeDepot
  137. WANTED: 2 6N6 "metal can" vacuum tubes
  138. 50Watt Vintage tube PA Tubes?
  139. Northern Electric Tubes
  140. Fooprints (symbols) for tubes for Orcad PCB designer
  141. Sovtek 12AX7s
  142. Octal tubes and microphonics?
  143. Tube amplifier for headphones
  144. Any Opinions on Octal Preamp Tubes?
  145. Cryo treatment of metal things with music coming out of them
  146. JJ EL84 failure
  147. Anybody Know About Ballast Tubes?
  148. 21.5 watts from a Pair of EL84's?
  149. Strange 5AR4 "Problem"
  150. Is cathode bias the same thing as "self" bias?
  151. Rectifier tube question
  152. Who made the Groove Tube KT-66HP?
  153. Bugera 333XL 212 Combo Tube Questions
  154. Senior TC130 tube tester chart
  155. Difference between 5AR$ and 5Y3 as Tweed Deluxe rectifier
  156. What to do with one of a pair of matched tubes
  157. Most reliable current production 5AR4/GZ34?
  158. Please recommend me tubes for my Bassman
  159. Peavey classic 30
  160. EF86 too weak. is it true what they say?
  161. JJ 6L6GC
  162. Will changing from a 5U4GB to ? lower my DC voltages?
  163. New 6Sl7
  164. Best New Issue EL34
  165. Upgrading Epiphone Valve Junior to a 7591 SE design?
  166. 6Y6s.....any good for audio?
  167. My Handsome Devil head
  168. 6AR6WA v. 6L6GC?
  169. EF86-type Sonic Differences.....
  170. New Issue 6L6
  171. 12AX7 HUM
  172. 6U8/ECF82 shielding question
  173. 7581a in Fender amps?
  174. 12AY7 as a DC-coupled cathode follower
  175. Vox AC 100 Mk2
  176. Tung-Sol 6L6STR fragile bottle top
  177. ECF80 or ECF82 for AF?
  178. SED Winged C Prices Way Up
  179. Tube Lineage?
  180. 12ax7LP substitute
  181. Chinese tubes
  182. KT66 Pin 1 variations - which one is accurate?
  183. Tung-Sol RI 6V6 - opinions/experience?
  184. Presently manufactured power tubes
  185. Very elementary question/Sovtek etc.
  186. 807s?
  187. Miniwatt, yes or no?
  188. RCA - customers advice wanted
  189. Chinese and Russian tubes
  190. SS Tube replacements...
  191. Telefunken in Fender amps?
  192. 7868-EH tubes any good? (New Electro Harmonix)
  193. What are the best 6550/KT88 tubes for 2011?
  194. Gold Lions (English)____Anyone familiar?
  195. Bench-testing vintage power tubes?
  196. 6v6 and 6v6GT
  197. cleaning old dirty tubes?
  198. Tube labeling: Paint? Etched?
  199. help plz: identifying old tubes
  200. Baldwin 12AX7 Made in USA AMY 31 13 29
  201. tube test just for 12Ax7?
  202. Sovtek 5Y3GT--good tube?
  203. Are you kidding me!? Really!?
  204. 6SQ7 vs. 6SF5
  205. Anybody have a legible TC-142 schematic?
  206. Woolly guitar sound
  207. 12AX7 Mullard/Philips/Amperex NOS
  208. New JJ 5U4GB whines on warm up.
  209. 7591 vs 6V6
  210. Help me identify some 12ax7 tubes, please?
  211. What does it take to break a tube pin?
  212. EZ81, 6CA4, EL84 Question.
  213. Russian 6P3S
  214. 7868 tube
  215. Screens Still weak in EH6V6?
  216. ken-rad 6l6g and 6v6gc from 1948?
  217. Groove Tubes Marshall distortion Confusion!! lol.
  218. New 12AY7 vs 5751, can't hear the difference...!
  219. B&K 707 Tube Tester - Problem with emmissions test
  220. 6550,6L6,12AX7 and distortion question
  221. Tube question
  222. Any reason I shouldn't...
  223. Teonex
  224. Eurotubes=Bad News
  225. Svetlana factory seconds
  226. Free tube datasheets
  227. RCA 6L6's ?
  228. "Soot" Inside EL84/6BQ5
  229. JCM800 Preamp Clone - Wierd Distortion (oscilloscope pic)
  230. "Shield" brand 6BQ5 Torched Screen Resistors
  231. Preamp tubes
  232. Jan Philips 6L6WGB
  233. Mesa Boogie tubes
  234. R.I.P. CV4004.....Any tube sob stories?
  235. 5Y3 EZ81?
  236. Tube Slag
  237. my NOS 5y3 is not working. bad tube?
  238. Old Hammond Tubes??
  239. Cabs suited for Vox AC50
  240. legacy vl100
  241. I need Help with this tube "8CW5/XL86
  242. Amp should be 100 watts but low on power, why?
  243. 6sl7/12sl7 experimentation ?s'
  244. Question about Tube Output Power
  245. I have some general Q's about tubes!
  246. Question about tube glow.
  247. Hiwatt hi-gain 50 head biasing review
  248. Do different make 12AX7 tubes sound different? and why?
  249. 12at7 labeled as 12ax7
  250. Good Sounding Tubes