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  1. Calibrating Tube Testers
  2. 6L6 Build Suggestions
  3. 5R4GY longevity in tube amps
  4. 5U4GB tube rectifier flash
  5. 6j6 & similar...
  6. Re-bonding tube bases
  7. replacing 6w8's with separate pre and output tubes
  8. Replacing 6L6 with 6V6?
  9. One of these things is not like the others...
  10. Russian made Groove Tubes?
  11. Awesome tube tester/curve tracer
  12. Tone stack Mod for Bogen H30
  13. help identifying this tube
  14. 6L6--- which brand best keeps the fenders sound
  15. More Bass/Less Mid mod for a Sovtek Mig 50h
  16. EL84 tubes
  17. Source for 9-pin (preamp) tube bases???
  18. Just used a 16 years old new tubes.
  19. Shuguang 6L6WGC - any info
  20. hardware for blackface fender fix
  21. Model t tubes
  22. Anybody looked at tube perveance values?
  23. Tube Storage
  24. When did the American Tung Sol factory cease production?
  25. New production 12AX7
  26. CE Distribution - policy change coming for defective tubes
  27. Sinorussotubeaphobia
  28. Triplett 3444 testing of a 12AX7
  29. Variations in Filament intensity
  30. Used power tubes
  31. New production Mullard El34's
  32. Origin of the 6L6GC?
  33. Sovtek 6CA7 fat bottle 90s era
  34. ID tubes from 1968 Traynor YVM-1
  35. Thoughts on Tung Sol reissue 12AX7 and reliability?
  36. Plate voltage of NOS RCA and NOS Tung Sol??
  37. Old Sovtek EL34G, similar tube?
  38. Current production Sovtek EL84M
  39. 12AX7 tube for overdriven analog organ
  40. ECC83 clipping
  41. Can KT88's be used in my amp?
  42. JJ 6L6GCs... WTF?
  43. Please suggest KT88 tubes
  44. wurlitzer branded general electric grey plate 12ax7
  45. Power Tube Swap Extravaganza!
  46. need a source for 6KG6A/ EL509 tubes
  47. how long do these last?
  48. What is this tube ID?
  49. Avo valve tester questions.
  50. winged C vs Svetlana el34s?
  51. Mercury Rectifier Tubes
  52. boutique/back yard tube maker in Japan [Youtube]
  53. cathode by-pass in push pull six tube hifi amp
  54. Nuvistors - what do you think?
  55. Bias question - 6L6
  56. Adhesive for Repairing 6V6GT Base?
  57. 5763 Tetrode - what do you think?
  58. NOS Metal Can 6V6 Tube Quesiton
  59. Franks Electron Tube Data Sheets site down?
  60. Tube amps
  61. rf/audio screen voltage ratings
  62. Help with value vintage Line Transformer Altec 2282
  63. Suggest preamp tube (12AX7)
  64. Anyone used Sovtek 12ax7wa - Had one crack
  65. ID this Tube?
  66. what power amp is this and who made it ????need schmatic
  67. Recommendations for EL34 for 520V on the plate
  68. Anyone else having issues with Winged C EL34's?
  69. JJ 5Y3?
  70. Retrovalves
  71. Question For Other NOS Tube Junkies
  72. mismatched 6v6 pairs; cathode bias
  73. Article - Return of the Vacuum Tube
  74. Tube-Based Boiler Controller / Thermostat?
  75. Any experience with this tube vendor?
  76. Blackface Deluxe Reverb No bias current reading
  77. Fender Bassman 10 Bias adjust conversion
  78. Proper Tube Removal Process?
  79. dead output transformer
  80. Shuguang data sheets
  81. Ordered JJ's for my Bugera 333XL
  82. The Tube Shop - anyone shopped there?
  83. Which 12AX7 for my 18 watt plexi build ?
  84. 12AH7A info
  85. Changing tubes in a Crate vc5310
  86. Winged C 6L6GC + TubeDepot
  87. WANTED: 2 6N6 "metal can" vacuum tubes
  88. 50Watt Vintage tube PA Tubes?
  89. Northern Electric Tubes
  90. Fooprints (symbols) for tubes for Orcad PCB designer
  91. Sovtek 12AX7s
  92. Octal tubes and microphonics?
  93. Tube amplifier for headphones
  94. Any Opinions on Octal Preamp Tubes?
  95. Cryo treatment of metal things with music coming out of them
  96. JJ EL84 failure
  97. Anybody Know About Ballast Tubes?
  98. 21.5 watts from a Pair of EL84's?
  99. Strange 5AR4 "Problem"
  100. Is cathode bias the same thing as "self" bias?
  101. Rectifier tube question
  102. Who made the Groove Tube KT-66HP?
  103. Bugera 333XL 212 Combo Tube Questions
  104. Senior TC130 tube tester chart
  105. Difference between 5AR$ and 5Y3 as Tweed Deluxe rectifier
  106. What to do with one of a pair of matched tubes
  107. Most reliable current production 5AR4/GZ34?
  108. Please recommend me tubes for my Bassman
  109. Peavey classic 30
  110. EF86 too weak. is it true what they say?
  111. JJ 6L6GC
  112. Will changing from a 5U4GB to ? lower my DC voltages?
  113. New 6Sl7
  114. Best New Issue EL34
  115. Upgrading Epiphone Valve Junior to a 7591 SE design?
  116. 6Y6s.....any good for audio?
  117. My Handsome Devil head
  118. 6AR6WA v. 6L6GC?
  119. EF86-type Sonic Differences.....
  120. New Issue 6L6
  121. 12AX7 HUM
  122. 6U8/ECF82 shielding question
  123. 7581a in Fender amps?
  124. 12AY7 as a DC-coupled cathode follower
  125. Vox AC 100 Mk2
  126. Tung-Sol 6L6STR fragile bottle top
  127. ECF80 or ECF82 for AF?
  128. SED Winged C Prices Way Up
  129. Tube Lineage?
  130. 12ax7LP substitute
  131. Chinese tubes
  132. KT66 Pin 1 variations - which one is accurate?
  133. Tung-Sol RI 6V6 - opinions/experience?
  134. Presently manufactured power tubes
  135. Very elementary question/Sovtek etc.
  136. 807s?
  137. Miniwatt, yes or no?
  138. RCA - customers advice wanted
  139. Chinese and Russian tubes
  140. SS Tube replacements...
  141. Telefunken in Fender amps?
  142. 7868-EH tubes any good? (New Electro Harmonix)
  143. What are the best 6550/KT88 tubes for 2011?
  144. Gold Lions (English)____Anyone familiar?
  145. Bench-testing vintage power tubes?
  146. 6v6 and 6v6GT
  147. cleaning old dirty tubes?
  148. Tube labeling: Paint? Etched?
  149. help plz: identifying old tubes
  150. Baldwin 12AX7 Made in USA AMY 31 13 29
  151. tube test just for 12Ax7?
  152. Sovtek 5Y3GT--good tube?
  153. Are you kidding me!? Really!?
  154. 6SQ7 vs. 6SF5
  155. Anybody have a legible TC-142 schematic?
  156. Woolly guitar sound
  157. 12AX7 Mullard/Philips/Amperex NOS
  158. New JJ 5U4GB whines on warm up.
  159. 7591 vs 6V6
  160. Help me identify some 12ax7 tubes, please?
  161. What does it take to break a tube pin?
  162. EZ81, 6CA4, EL84 Question.
  163. Russian 6P3S
  164. 7868 tube
  165. Screens Still weak in EH6V6?
  166. ken-rad 6l6g and 6v6gc from 1948?
  167. Groove Tubes Marshall distortion Confusion!! lol.
  168. New 12AY7 vs 5751, can't hear the difference...!
  169. B&K 707 Tube Tester - Problem with emmissions test
  170. 6550,6L6,12AX7 and distortion question
  171. Tube question
  172. Any reason I shouldn't...
  173. Teonex
  174. Eurotubes=Bad News
  175. Svetlana factory seconds
  176. Free tube datasheets
  177. RCA 6L6's ?
  178. "Soot" Inside EL84/6BQ5
  179. JCM800 Preamp Clone - Wierd Distortion (oscilloscope pic)
  180. "Shield" brand 6BQ5 Torched Screen Resistors
  181. Preamp tubes
  182. Jan Philips 6L6WGB
  183. Mesa Boogie tubes
  184. R.I.P. CV4004.....Any tube sob stories?
  185. 5Y3 EZ81?
  186. Tube Slag
  187. my NOS 5y3 is not working. bad tube?
  188. Old Hammond Tubes??
  189. Cabs suited for Vox AC50
  190. legacy vl100
  191. I need Help with this tube "8CW5/XL86
  192. Amp should be 100 watts but low on power, why?
  193. 6sl7/12sl7 experimentation ?s'
  194. Question about Tube Output Power
  195. I have some general Q's about tubes!
  196. Question about tube glow.
  197. Hiwatt hi-gain 50 head biasing review
  198. Do different make 12AX7 tubes sound different? and why?
  199. 12at7 labeled as 12ax7
  200. Good Sounding Tubes
  201. New Tubes and disaster
  202. ECC 807 Brimar
  203. In at the deep end....
  204. Hiwatt hi-gain 50 head
  205. 6Y6GT in a Champ ?
  206. Bias probe
  207. No Sound on Fender Twin Pro All tube
  208. hammond tubes question
  209. Crate blue voodoo 60 watt 2-12 combo problems need advise
  210. Ampeg V4, maximizing headroom, needing real answers...
  211. Yellow Jacket Power Tube Adapter
  212. Hammond 7247
  213. The difference a tube can make
  214. What to do
  215. Laney AOR
  216. Tube Tests and Specs
  217. Duende Criatura?
  218. A Good New 12AY7?
  219. Fender Twin Preamp Question.
  220. Ampeg VL-503 not working tube arent glowing
  221. Ampeg SVT pro 3
  222. ECF80 / 6bl8 New ( not NOS ) ???
  223. 5881 question
  224. Useful Valve Test Reports
  225. Help identify a National Electronics 6l6 tube
  226. Tubes
  227. Phase Inverter tube capability
  228. Mesa boogie recto preamp tube placement values
  229. 12b4a ge jan
  230. 5AS4A acceptable Sub For 5U4G ?
  231. What NEW 12AX7 is BEST
  232. Anyone have info on A rcp 808aa tubetester?
  233. Variable cathode resistor
  234. The original chinese 12AX7's
  235. Making a solid state rectifier
  236. Tube amp death (auto bias-trouble)
  237. 12ax7 trouble
  238. Boy, do I HATE this (new tube rant)!
  239. Changing tubes on a Gibson Goldtone Ga-15
  240. 5u4 rattles on powerup
  241. NOS Russian 6Pi6c Beam Tetrodes
  242. Hammond-labeled tubes - mfr?
  243. JJ 6V6s sturdiness
  244. KT66 questions
  245. Changing Vibroluxe Reverb Custom tubes
  246. 6v6, 6f6
  247. What do these tubes do and can I use them in a THD amp?
  248. dsl 100 bias problem
  249. 12AX7 testing
  250. Kt100