View Full Version : Tubes (Valves)

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  1. Modern 5y3s
  2. 6V6 Screen Voltage in 5E1 Champ
  3. Mod'ing a tube circuit (from early 60's stereo turntable)
  4. Tube blog
  5. 6EU7 tube
  6. Telefunken Tubes?
  7. Which current production 12AX7 have short plates and spiral filaments?
  8. JJ 6CA7 a better option for 6L6 amps w/ excessive B+?
  9. 12AX7 What is Mu?
  10. Handy List of Links to New-Sensor Tube Data Sheets
  11. Cool old tubes for tone gurus
  12. 5G9 'clone' build question
  13. Blues Junior Buzzing
  14. JJ Tubes 12AX7/ECC83S Hum Problems Anyone?
  15. Off kilter 6v6.. any prob?
  16. Help identifying Hughes & Kettner CM3 Vacuum tube
  17. How tall are kt66 tubes in real life?
  18. Check this out
  19. Are new production EL34's just this bad or is there a problem in my amp I don't see?
  20. So I need some help for a new prototype.....
  21. Probably a really simple bias question
  22. Is JAN Sylvania 6L6WGB under rated the same as JAN Philips 6L6WGB?
  23. Fender pro junior bad transformer and red plating v3 tube
  24. Idea: singleton power tube trading forum?
  25. Aaron C
  26. Data sheet confusion for 12BY7-A
  27. sound city 120 - I may have 'highlighted' a fault !!!
  28. high screen voltage
  29. Preamp tubes with different triodes
  30. Help me Identify these Tubes!
  31. 6F12P
  32. Suggestions for 30-40v power supply for micro tubes.
  33. Laney IronHeart
  34. Matching tubes at home Q?
  35. Guild thunder 1 help
  36. Dropping B+ substantially
  37. tube /valve Biasing
  38. 6CA7 Current Draw Increases
  39. Viking tube radio to guitar amp
  40. JJ 6v6s spare pins.
  41. high gain amp attenuating
  42. Will this output transformer work?
  43. Homemade Tube Tester
  44. Eico HF-20 50's 6L6 UL HIFI amp, convert for guitar or just try to sell it?
  45. 6v6 Grid Bias Circuit.
  46. Bias test points.
  47. Antique Sound Lab 6L6 Tube Up For Adoption
  48. Fender Twin Reverb 65 Reissue 6L6 Tube Replacement
  49. Any new EL84's lately with better reject rates?
  50. Tung-Sol 5881 - Hard, Medium, Soft?
  51. Can someone look over my biasing data to see if I've got it right.
  52. Help with tube data sheet, ecll800
  53. Help with tube data sheet, ecll800
  54. resistors as inrush limiters before full-wave diodes?
  55. Calibrating Tube Testers
  56. 6L6 Build Suggestions
  57. 5R4GY longevity in tube amps
  58. 5U4GB tube rectifier flash
  59. 6j6 & similar...
  60. Re-bonding tube bases
  61. replacing 6w8's with separate pre and output tubes
  62. Replacing 6L6 with 6V6?
  63. One of these things is not like the others...
  64. Russian made Groove Tubes?
  65. Awesome tube tester/curve tracer
  66. Tone stack Mod for Bogen H30
  67. help identifying this tube
  68. 6L6--- which brand best keeps the fenders sound
  69. More Bass/Less Mid mod for a Sovtek Mig 50h
  70. EL84 tubes
  71. Source for 9-pin (preamp) tube bases???
  72. Just used a 16 years old new tubes.
  73. Shuguang 6L6WGC - any info
  74. hardware for blackface fender fix
  75. Model t tubes
  76. Anybody looked at tube perveance values?
  77. Tube Storage
  78. When did the American Tung Sol factory cease production?
  79. New production 12AX7
  80. CE Distribution - policy change coming for defective tubes
  81. Sinorussotubeaphobia
  82. Triplett 3444 testing of a 12AX7
  83. Variations in Filament intensity
  84. Used power tubes
  85. New production Mullard El34's
  86. Origin of the 6L6GC?
  87. Sovtek 6CA7 fat bottle 90s era
  88. ID tubes from 1968 Traynor YVM-1
  89. Thoughts on Tung Sol reissue 12AX7 and reliability?
  90. Plate voltage of NOS RCA and NOS Tung Sol??
  91. Old Sovtek EL34G, similar tube?
  92. Current production Sovtek EL84M
  93. 12AX7 tube for overdriven analog organ
  94. ECC83 clipping
  95. Can KT88's be used in my amp?
  96. JJ 6L6GCs... WTF?
  97. Please suggest KT88 tubes
  98. wurlitzer branded general electric grey plate 12ax7
  99. Power Tube Swap Extravaganza!
  100. need a source for 6KG6A/ EL509 tubes
  101. how long do these last?
  102. What is this tube ID?
  103. Avo valve tester questions.
  104. winged C vs Svetlana el34s?
  105. Mercury Rectifier Tubes
  106. boutique/back yard tube maker in Japan [Youtube]
  107. cathode by-pass in push pull six tube hifi amp
  108. Nuvistors - what do you think?
  109. Bias question - 6L6
  110. Adhesive for Repairing 6V6GT Base?
  111. 5763 Tetrode - what do you think?
  112. NOS Metal Can 6V6 Tube Quesiton
  113. Franks Electron Tube Data Sheets site down?
  114. Tube amps
  115. rf/audio screen voltage ratings
  116. Help with value vintage Line Transformer Altec 2282
  117. Suggest preamp tube (12AX7)
  118. Anyone used Sovtek 12ax7wa - Had one crack
  119. ID this Tube?
  120. what power amp is this and who made it ????need schmatic
  121. Recommendations for EL34 for 520V on the plate
  122. Anyone else having issues with Winged C EL34's?
  123. JJ 5Y3?
  124. Retrovalves
  125. Question For Other NOS Tube Junkies
  126. mismatched 6v6 pairs; cathode bias
  127. Article - Return of the Vacuum Tube
  128. Tube-Based Boiler Controller / Thermostat?
  129. Any experience with this tube vendor?
  130. Blackface Deluxe Reverb No bias current reading
  131. Fender Bassman 10 Bias adjust conversion
  132. Proper Tube Removal Process?
  133. dead output transformer
  134. Shuguang data sheets
  135. Ordered JJ's for my Bugera 333XL
  136. The Tube Shop - anyone shopped there?
  137. Which 12AX7 for my 18 watt plexi build ?
  138. 12AH7A info
  139. Changing tubes in a Crate vc5310
  140. Winged C 6L6GC + TubeDepot
  141. WANTED: 2 6N6 "metal can" vacuum tubes
  142. 50Watt Vintage tube PA Tubes?
  143. Northern Electric Tubes
  144. Fooprints (symbols) for tubes for Orcad PCB designer
  145. Sovtek 12AX7s
  146. Octal tubes and microphonics?
  147. Tube amplifier for headphones
  148. Any Opinions on Octal Preamp Tubes?
  149. Cryo treatment of metal things with music coming out of them
  150. JJ EL84 failure
  151. Anybody Know About Ballast Tubes?
  152. 21.5 watts from a Pair of EL84's?
  153. Strange 5AR4 "Problem"
  154. Is cathode bias the same thing as "self" bias?
  155. Rectifier tube question
  156. Who made the Groove Tube KT-66HP?
  157. Bugera 333XL 212 Combo Tube Questions
  158. Senior TC130 tube tester chart
  159. Difference between 5AR$ and 5Y3 as Tweed Deluxe rectifier
  160. What to do with one of a pair of matched tubes
  161. Most reliable current production 5AR4/GZ34?
  162. Please recommend me tubes for my Bassman
  163. Peavey classic 30
  164. EF86 too weak. is it true what they say?
  165. JJ 6L6GC
  166. Will changing from a 5U4GB to ? lower my DC voltages?
  167. New 6Sl7
  168. Best New Issue EL34
  169. Upgrading Epiphone Valve Junior to a 7591 SE design?
  170. 6Y6s.....any good for audio?
  171. My Handsome Devil head
  172. 6AR6WA v. 6L6GC?
  173. EF86-type Sonic Differences.....
  174. New Issue 6L6
  175. 12AX7 HUM
  176. 6U8/ECF82 shielding question
  177. 7581a in Fender amps?
  178. 12AY7 as a DC-coupled cathode follower
  179. Vox AC 100 Mk2
  180. Tung-Sol 6L6STR fragile bottle top
  181. ECF80 or ECF82 for AF?
  182. SED Winged C Prices Way Up
  183. Tube Lineage?
  184. 12ax7LP substitute
  185. Chinese tubes
  186. KT66 Pin 1 variations - which one is accurate?
  187. Tung-Sol RI 6V6 - opinions/experience?
  188. Presently manufactured power tubes
  189. Very elementary question/Sovtek etc.
  190. 807s?
  191. Miniwatt, yes or no?
  192. RCA - customers advice wanted
  193. Chinese and Russian tubes
  194. SS Tube replacements...
  195. Telefunken in Fender amps?
  196. 7868-EH tubes any good? (New Electro Harmonix)
  197. What are the best 6550/KT88 tubes for 2011?
  198. Gold Lions (English)____Anyone familiar?
  199. Bench-testing vintage power tubes?
  200. 6v6 and 6v6GT
  201. cleaning old dirty tubes?
  202. Tube labeling: Paint? Etched?
  203. help plz: identifying old tubes
  204. Baldwin 12AX7 Made in USA AMY 31 13 29
  205. tube test just for 12Ax7?
  206. Sovtek 5Y3GT--good tube?
  207. Are you kidding me!? Really!?
  208. 6SQ7 vs. 6SF5
  209. Anybody have a legible TC-142 schematic?
  210. Woolly guitar sound
  211. 12AX7 Mullard/Philips/Amperex NOS
  212. New JJ 5U4GB whines on warm up.
  213. 7591 vs 6V6
  214. Help me identify some 12ax7 tubes, please?
  215. What does it take to break a tube pin?
  216. EZ81, 6CA4, EL84 Question.
  217. Russian 6P3S
  218. 7868 tube
  219. Screens Still weak in EH6V6?
  220. ken-rad 6l6g and 6v6gc from 1948?
  221. Groove Tubes Marshall distortion Confusion!! lol.
  222. New 12AY7 vs 5751, can't hear the difference...!
  223. B&K 707 Tube Tester - Problem with emmissions test
  224. 6550,6L6,12AX7 and distortion question
  225. Tube question
  226. Any reason I shouldn't...
  227. Teonex
  228. Eurotubes=Bad News
  229. Svetlana factory seconds
  230. Free tube datasheets
  231. RCA 6L6's ?
  232. "Soot" Inside EL84/6BQ5
  233. JCM800 Preamp Clone - Wierd Distortion (oscilloscope pic)
  234. "Shield" brand 6BQ5 Torched Screen Resistors
  235. Preamp tubes
  236. Jan Philips 6L6WGB
  237. Mesa Boogie tubes
  238. R.I.P. CV4004.....Any tube sob stories?
  239. 5Y3 EZ81?
  240. Tube Slag
  241. my NOS 5y3 is not working. bad tube?
  242. Old Hammond Tubes??
  243. Cabs suited for Vox AC50
  244. legacy vl100
  245. I need Help with this tube "8CW5/XL86
  246. Amp should be 100 watts but low on power, why?
  247. 6sl7/12sl7 experimentation ?s'
  248. Question about Tube Output Power
  249. I have some general Q's about tubes!
  250. Question about tube glow.