View Full Version : Tubes (Valves)

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