View Full Version : Tubes (Valves)

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  1. Getter flash spots changing over time
  2. Marshall Branded Tubes
  3. 6ak6-tone-experience?
  4. Ultra Linear Tap percentage
  5. 6SQ7? In a Gibson GA-20...
  6. Sovtek EL84m tests poor in Orange valve tester??
  7. Is a halo the sign of a bad tube?
  8. Beam Pentode orientation in relation to mains transformer
  9. Help Id holland made tube ,looks like el84 not sure though
  10. Tube ID?
  11. Found this old schematic
  12. amperex tubes and mesa tri-axis
  13. Any love for the Mazda 6/30L2?
  14. Static Shield in isolation transformer
  15. Modifying Widow makers with an isolation transformer
  16. Uh Oh I think I blew it
  17. Vintage Tube Amp Modification
  18. TNT brand?
  19. Triode / Pentode Loadline Simulator
  20. Modern 5y3s
  21. 6V6 Screen Voltage in 5E1 Champ
  22. Mod'ing a tube circuit (from early 60's stereo turntable)
  23. Tube blog
  24. 6EU7 tube
  25. Telefunken Tubes?
  26. Which current production 12AX7 have short plates and spiral filaments?
  27. JJ 6CA7 a better option for 6L6 amps w/ excessive B+?
  28. 12AX7 What is Mu?
  29. Handy List of Links to New-Sensor Tube Data Sheets
  30. Cool old tubes for tone gurus
  31. 5G9 'clone' build question
  32. Blues Junior Buzzing
  33. JJ Tubes 12AX7/ECC83S Hum Problems Anyone?
  34. Off kilter 6v6.. any prob?
  35. Help identifying Hughes & Kettner CM3 Vacuum tube
  36. How tall are kt66 tubes in real life?
  37. Check this out
  38. Are new production EL34's just this bad or is there a problem in my amp I don't see?
  39. So I need some help for a new prototype.....
  40. Probably a really simple bias question
  41. Is JAN Sylvania 6L6WGB under rated the same as JAN Philips 6L6WGB?
  42. Fender pro junior bad transformer and red plating v3 tube
  43. Idea: singleton power tube trading forum?
  44. Aaron C
  45. Data sheet confusion for 12BY7-A
  46. sound city 120 - I may have 'highlighted' a fault !!!
  47. high screen voltage
  48. Preamp tubes with different triodes
  49. Help me Identify these Tubes!
  50. 6F12P
  51. Suggestions for 30-40v power supply for micro tubes.
  52. Laney IronHeart
  53. Matching tubes at home Q?
  54. Guild thunder 1 help
  55. Dropping B+ substantially
  56. tube /valve Biasing
  57. 6CA7 Current Draw Increases
  58. Viking tube radio to guitar amp
  59. JJ 6v6s spare pins.
  60. high gain amp attenuating
  61. Will this output transformer work?
  62. Homemade Tube Tester
  63. Eico HF-20 50's 6L6 UL HIFI amp, convert for guitar or just try to sell it?
  64. 6v6 Grid Bias Circuit.
  65. Bias test points.
  66. Antique Sound Lab 6L6 Tube Up For Adoption
  67. Fender Twin Reverb 65 Reissue 6L6 Tube Replacement
  68. Any new EL84's lately with better reject rates?
  69. Tung-Sol 5881 - Hard, Medium, Soft?
  70. Can someone look over my biasing data to see if I've got it right.
  71. Help with tube data sheet, ecll800
  72. Help with tube data sheet, ecll800
  73. resistors as inrush limiters before full-wave diodes?
  74. Calibrating Tube Testers
  75. 6L6 Build Suggestions
  76. 5R4GY longevity in tube amps
  77. 5U4GB tube rectifier flash
  78. 6j6 & similar...
  79. Re-bonding tube bases
  80. replacing 6w8's with separate pre and output tubes
  81. Replacing 6L6 with 6V6?
  82. One of these things is not like the others...
  83. Russian made Groove Tubes?
  84. Awesome tube tester/curve tracer
  85. Tone stack Mod for Bogen H30
  86. help identifying this tube
  87. 6L6--- which brand best keeps the fenders sound
  88. More Bass/Less Mid mod for a Sovtek Mig 50h
  89. EL84 tubes
  90. Source for 9-pin (preamp) tube bases???
  91. Just used a 16 years old new tubes.
  92. Shuguang 6L6WGC - any info
  93. hardware for blackface fender fix
  94. Model t tubes
  95. Anybody looked at tube perveance values?
  96. Tube Storage
  97. When did the American Tung Sol factory cease production?
  98. New production 12AX7
  99. CE Distribution - policy change coming for defective tubes
  100. Sinorussotubeaphobia
  101. Triplett 3444 testing of a 12AX7
  102. Variations in Filament intensity
  103. Used power tubes
  104. New production Mullard El34's
  105. Origin of the 6L6GC?
  106. Sovtek 6CA7 fat bottle 90s era
  107. ID tubes from 1968 Traynor YVM-1
  108. Thoughts on Tung Sol reissue 12AX7 and reliability?
  109. Plate voltage of NOS RCA and NOS Tung Sol??
  110. Old Sovtek EL34G, similar tube?
  111. Current production Sovtek EL84M
  112. 12AX7 tube for overdriven analog organ
  113. ECC83 clipping
  114. Can KT88's be used in my amp?
  115. JJ 6L6GCs... WTF?
  116. Please suggest KT88 tubes
  117. wurlitzer branded general electric grey plate 12ax7
  118. Power Tube Swap Extravaganza!
  119. need a source for 6KG6A/ EL509 tubes
  120. how long do these last?
  121. What is this tube ID?
  122. Avo valve tester questions.
  123. winged C vs Svetlana el34s?
  124. Mercury Rectifier Tubes
  125. boutique/back yard tube maker in Japan [Youtube]
  126. cathode by-pass in push pull six tube hifi amp
  127. Nuvistors - what do you think?
  128. Bias question - 6L6
  129. Adhesive for Repairing 6V6GT Base?
  130. 5763 Tetrode - what do you think?
  131. NOS Metal Can 6V6 Tube Quesiton
  132. Franks Electron Tube Data Sheets site down?
  133. Tube amps
  134. rf/audio screen voltage ratings
  135. Help with value vintage Line Transformer Altec 2282
  136. Suggest preamp tube (12AX7)
  137. Anyone used Sovtek 12ax7wa - Had one crack
  138. ID this Tube?
  139. what power amp is this and who made it ????need schmatic
  140. Recommendations for EL34 for 520V on the plate
  141. Anyone else having issues with Winged C EL34's?
  142. JJ 5Y3?
  143. Retrovalves
  144. Question For Other NOS Tube Junkies
  145. mismatched 6v6 pairs; cathode bias
  146. Article - Return of the Vacuum Tube
  147. Tube-Based Boiler Controller / Thermostat?
  148. Any experience with this tube vendor?
  149. Blackface Deluxe Reverb No bias current reading
  150. Fender Bassman 10 Bias adjust conversion
  151. Proper Tube Removal Process?
  152. dead output transformer
  153. Shuguang data sheets
  154. Ordered JJ's for my Bugera 333XL
  155. The Tube Shop - anyone shopped there?
  156. Which 12AX7 for my 18 watt plexi build ?
  157. 12AH7A info
  158. Changing tubes in a Crate vc5310
  159. Winged C 6L6GC + TubeDepot
  160. WANTED: 2 6N6 "metal can" vacuum tubes
  161. 50Watt Vintage tube PA Tubes?
  162. Northern Electric Tubes
  163. Fooprints (symbols) for tubes for Orcad PCB designer
  164. Sovtek 12AX7s
  165. Octal tubes and microphonics?
  166. Tube amplifier for headphones
  167. Any Opinions on Octal Preamp Tubes?
  168. Cryo treatment of metal things with music coming out of them
  169. JJ EL84 failure
  170. Anybody Know About Ballast Tubes?
  171. 21.5 watts from a Pair of EL84's?
  172. Strange 5AR4 "Problem"
  173. Is cathode bias the same thing as "self" bias?
  174. Rectifier tube question
  175. Who made the Groove Tube KT-66HP?
  176. Bugera 333XL 212 Combo Tube Questions
  177. Senior TC130 tube tester chart
  178. Difference between 5AR$ and 5Y3 as Tweed Deluxe rectifier
  179. What to do with one of a pair of matched tubes
  180. Most reliable current production 5AR4/GZ34?
  181. Please recommend me tubes for my Bassman
  182. Peavey classic 30
  183. EF86 too weak. is it true what they say?
  184. JJ 6L6GC
  185. Will changing from a 5U4GB to ? lower my DC voltages?
  186. New 6Sl7
  187. Best New Issue EL34
  188. Upgrading Epiphone Valve Junior to a 7591 SE design?
  189. 6Y6s.....any good for audio?
  190. My Handsome Devil head
  191. 6AR6WA v. 6L6GC?
  192. EF86-type Sonic Differences.....
  193. New Issue 6L6
  194. 12AX7 HUM
  195. 6U8/ECF82 shielding question
  196. 7581a in Fender amps?
  197. 12AY7 as a DC-coupled cathode follower
  198. Vox AC 100 Mk2
  199. Tung-Sol 6L6STR fragile bottle top
  200. ECF80 or ECF82 for AF?
  201. SED Winged C Prices Way Up
  202. Tube Lineage?
  203. 12ax7LP substitute
  204. Chinese tubes
  205. KT66 Pin 1 variations - which one is accurate?
  206. Tung-Sol RI 6V6 - opinions/experience?
  207. Presently manufactured power tubes
  208. Very elementary question/Sovtek etc.
  209. 807s?
  210. Miniwatt, yes or no?
  211. RCA - customers advice wanted
  212. Chinese and Russian tubes
  213. SS Tube replacements...
  214. Telefunken in Fender amps?
  215. 7868-EH tubes any good? (New Electro Harmonix)
  216. What are the best 6550/KT88 tubes for 2011?
  217. Gold Lions (English)____Anyone familiar?
  218. Bench-testing vintage power tubes?
  219. 6v6 and 6v6GT
  220. cleaning old dirty tubes?
  221. Tube labeling: Paint? Etched?
  222. help plz: identifying old tubes
  223. Baldwin 12AX7 Made in USA AMY 31 13 29
  224. tube test just for 12Ax7?
  225. Sovtek 5Y3GT--good tube?
  226. Are you kidding me!? Really!?
  227. 6SQ7 vs. 6SF5
  228. Anybody have a legible TC-142 schematic?
  229. Woolly guitar sound
  230. 12AX7 Mullard/Philips/Amperex NOS
  231. New JJ 5U4GB whines on warm up.
  232. 7591 vs 6V6
  233. Help me identify some 12ax7 tubes, please?
  234. What does it take to break a tube pin?
  235. EZ81, 6CA4, EL84 Question.
  236. Russian 6P3S
  237. 7868 tube
  238. Screens Still weak in EH6V6?
  239. ken-rad 6l6g and 6v6gc from 1948?
  240. Groove Tubes Marshall distortion Confusion!! lol.
  241. New 12AY7 vs 5751, can't hear the difference...!
  242. B&K 707 Tube Tester - Problem with emmissions test
  243. 6550,6L6,12AX7 and distortion question
  244. Tube question
  245. Any reason I shouldn't...
  246. Teonex
  247. Eurotubes=Bad News
  248. Svetlana factory seconds
  249. Free tube datasheets
  250. RCA 6L6's ?