View Full Version : Tubes (Valves)

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