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  1. 5U4GB tube rectifier flash
  2. 6j6 & similar...
  3. Re-bonding tube bases
  4. replacing 6w8's with separate pre and output tubes
  5. Replacing 6L6 with 6V6?
  6. One of these things is not like the others...
  7. Russian made Groove Tubes?
  8. Awesome tube tester/curve tracer
  9. Tone stack Mod for Bogen H30
  10. help identifying this tube
  11. 6L6--- which brand best keeps the fenders sound
  12. More Bass/Less Mid mod for a Sovtek Mig 50h
  13. EL84 tubes
  14. Source for 9-pin (preamp) tube bases???
  15. Just used a 16 years old new tubes.
  16. Shuguang 6L6WGC - any info
  17. hardware for blackface fender fix
  18. Model t tubes
  19. Anybody looked at tube perveance values?
  20. Tube Storage
  21. When did the American Tung Sol factory cease production?
  22. New production 12AX7
  23. CE Distribution - policy change coming for defective tubes
  24. Sinorussotubeaphobia
  25. Triplett 3444 testing of a 12AX7
  26. Variations in Filament intensity
  27. Used power tubes
  28. New production Mullard El34's
  29. Origin of the 6L6GC?
  30. Sovtek 6CA7 fat bottle 90s era
  31. ID tubes from 1968 Traynor YVM-1
  32. Thoughts on Tung Sol reissue 12AX7 and reliability?
  33. Plate voltage of NOS RCA and NOS Tung Sol??
  34. Old Sovtek EL34G, similar tube?
  35. Current production Sovtek EL84M
  36. 12AX7 tube for overdriven analog organ
  37. ECC83 clipping
  38. Can KT88's be used in my amp?
  39. JJ 6L6GCs... WTF?
  40. Please suggest KT88 tubes
  41. wurlitzer branded general electric grey plate 12ax7
  42. Power Tube Swap Extravaganza!
  43. need a source for 6KG6A/ EL509 tubes
  44. how long do these last?
  45. What is this tube ID?
  46. Avo valve tester questions.
  47. winged C vs Svetlana el34s?
  48. Mercury Rectifier Tubes
  49. boutique/back yard tube maker in Japan [Youtube]
  50. cathode by-pass in push pull six tube hifi amp
  51. Nuvistors - what do you think?
  52. Bias question - 6L6
  53. Adhesive for Repairing 6V6GT Base?
  54. 5763 Tetrode - what do you think?
  55. NOS Metal Can 6V6 Tube Quesiton
  56. Franks Electron Tube Data Sheets site down?
  57. Tube amps
  58. rf/audio screen voltage ratings
  59. Help with value vintage Line Transformer Altec 2282
  60. Suggest preamp tube (12AX7)
  61. Anyone used Sovtek 12ax7wa - Had one crack
  62. ID this Tube?
  63. what power amp is this and who made it ????need schmatic
  64. Recommendations for EL34 for 520V on the plate
  65. Anyone else having issues with Winged C EL34's?
  66. JJ 5Y3?
  67. Retrovalves
  68. Question For Other NOS Tube Junkies
  69. mismatched 6v6 pairs; cathode bias
  70. Article - Return of the Vacuum Tube
  71. Tube-Based Boiler Controller / Thermostat?
  72. Any experience with this tube vendor?
  73. Blackface Deluxe Reverb No bias current reading
  74. Fender Bassman 10 Bias adjust conversion
  75. Proper Tube Removal Process?
  76. dead output transformer
  77. Shuguang data sheets
  78. Ordered JJ's for my Bugera 333XL
  79. The Tube Shop - anyone shopped there?
  80. Which 12AX7 for my 18 watt plexi build ?
  81. 12AH7A info
  82. Changing tubes in a Crate vc5310
  83. Winged C 6L6GC + TubeDepot
  84. WANTED: 2 6N6 "metal can" vacuum tubes
  85. 50Watt Vintage tube PA Tubes?
  86. Northern Electric Tubes
  87. Fooprints (symbols) for tubes for Orcad PCB designer
  88. Sovtek 12AX7s
  89. Octal tubes and microphonics?
  90. Tube amplifier for headphones
  91. Any Opinions on Octal Preamp Tubes?
  92. Cryo treatment of metal things with music coming out of them
  93. JJ EL84 failure
  94. Anybody Know About Ballast Tubes?
  95. 21.5 watts from a Pair of EL84's?
  96. Strange 5AR4 "Problem"
  97. Is cathode bias the same thing as "self" bias?
  98. Rectifier tube question
  99. Who made the Groove Tube KT-66HP?
  100. Bugera 333XL 212 Combo Tube Questions
  101. Senior TC130 tube tester chart
  102. Difference between 5AR$ and 5Y3 as Tweed Deluxe rectifier
  103. What to do with one of a pair of matched tubes
  104. Most reliable current production 5AR4/GZ34?
  105. Please recommend me tubes for my Bassman
  106. Peavey classic 30
  107. EF86 too weak. is it true what they say?
  108. JJ 6L6GC
  109. Will changing from a 5U4GB to ? lower my DC voltages?
  110. New 6Sl7
  111. Best New Issue EL34
  112. Upgrading Epiphone Valve Junior to a 7591 SE design?
  113. 6Y6s.....any good for audio?
  114. My Handsome Devil head
  115. 6AR6WA v. 6L6GC?
  116. EF86-type Sonic Differences.....
  117. New Issue 6L6
  118. 12AX7 HUM
  119. 6U8/ECF82 shielding question
  120. 7581a in Fender amps?
  121. 12AY7 as a DC-coupled cathode follower
  122. Vox AC 100 Mk2
  123. Tung-Sol 6L6STR fragile bottle top
  124. ECF80 or ECF82 for AF?
  125. SED Winged C Prices Way Up
  126. Tube Lineage?
  127. 12ax7LP substitute
  128. Chinese tubes
  129. KT66 Pin 1 variations - which one is accurate?
  130. Tung-Sol RI 6V6 - opinions/experience?
  131. Presently manufactured power tubes
  132. Very elementary question/Sovtek etc.
  133. 807s?
  134. Miniwatt, yes or no?
  135. RCA - customers advice wanted
  136. Chinese and Russian tubes
  137. SS Tube replacements...
  138. Telefunken in Fender amps?
  139. 7868-EH tubes any good? (New Electro Harmonix)
  140. What are the best 6550/KT88 tubes for 2011?
  141. Gold Lions (English)____Anyone familiar?
  142. Bench-testing vintage power tubes?
  143. 6v6 and 6v6GT
  144. cleaning old dirty tubes?
  145. Tube labeling: Paint? Etched?
  146. help plz: identifying old tubes
  147. Baldwin 12AX7 Made in USA AMY 31 13 29
  148. tube test just for 12Ax7?
  149. Sovtek 5Y3GT--good tube?
  150. Are you kidding me!? Really!?
  151. 6SQ7 vs. 6SF5
  152. Anybody have a legible TC-142 schematic?
  153. Woolly guitar sound
  154. 12AX7 Mullard/Philips/Amperex NOS
  155. New JJ 5U4GB whines on warm up.
  156. 7591 vs 6V6
  157. Help me identify some 12ax7 tubes, please?
  158. What does it take to break a tube pin?
  159. EZ81, 6CA4, EL84 Question.
  160. Russian 6P3S
  161. 7868 tube
  162. Screens Still weak in EH6V6?
  163. ken-rad 6l6g and 6v6gc from 1948?
  164. Groove Tubes Marshall distortion Confusion!! lol.
  165. New 12AY7 vs 5751, can't hear the difference...!
  166. B&K 707 Tube Tester - Problem with emmissions test
  167. 6550,6L6,12AX7 and distortion question
  168. Tube question
  169. Any reason I shouldn't...
  170. Teonex
  171. Eurotubes=Bad News
  172. Svetlana factory seconds
  173. Free tube datasheets
  174. RCA 6L6's ?
  175. "Soot" Inside EL84/6BQ5
  176. JCM800 Preamp Clone - Wierd Distortion (oscilloscope pic)
  177. "Shield" brand 6BQ5 Torched Screen Resistors
  178. Preamp tubes
  179. Jan Philips 6L6WGB
  180. Mesa Boogie tubes
  181. R.I.P. CV4004.....Any tube sob stories?
  182. 5Y3 EZ81?
  183. Tube Slag
  184. my NOS 5y3 is not working. bad tube?
  185. Old Hammond Tubes??
  186. Cabs suited for Vox AC50
  187. legacy vl100
  188. I need Help with this tube "8CW5/XL86
  189. Amp should be 100 watts but low on power, why?
  190. 6sl7/12sl7 experimentation ?s'
  191. Question about Tube Output Power
  192. I have some general Q's about tubes!
  193. Question about tube glow.
  194. Hiwatt hi-gain 50 head biasing review
  195. Do different make 12AX7 tubes sound different? and why?
  196. 12at7 labeled as 12ax7
  197. Good Sounding Tubes
  198. New Tubes and disaster
  199. ECC 807 Brimar
  200. In at the deep end....
  201. Hiwatt hi-gain 50 head
  202. 6Y6GT in a Champ ?
  203. Bias probe
  204. No Sound on Fender Twin Pro All tube
  205. hammond tubes question
  206. Crate blue voodoo 60 watt 2-12 combo problems need advise
  207. Ampeg V4, maximizing headroom, needing real answers...
  208. Yellow Jacket Power Tube Adapter
  209. Hammond 7247
  210. The difference a tube can make
  211. What to do
  212. Laney AOR
  213. Tube Tests and Specs
  214. Duende Criatura?
  215. A Good New 12AY7?
  216. Fender Twin Preamp Question.
  217. Ampeg VL-503 not working tube arent glowing
  218. Ampeg SVT pro 3
  219. ECF80 / 6bl8 New ( not NOS ) ???
  220. 5881 question
  221. Useful Valve Test Reports
  222. Help identify a National Electronics 6l6 tube
  223. Tubes
  224. Phase Inverter tube capability
  225. Mesa boogie recto preamp tube placement values
  226. 12b4a ge jan
  227. 5AS4A acceptable Sub For 5U4G ?
  228. What NEW 12AX7 is BEST
  229. Anyone have info on A rcp 808aa tubetester?
  230. Variable cathode resistor
  231. The original chinese 12AX7's
  232. Making a solid state rectifier
  233. Tube amp death (auto bias-trouble)
  234. 12ax7 trouble
  235. Boy, do I HATE this (new tube rant)!
  236. Changing tubes on a Gibson Goldtone Ga-15
  237. 5u4 rattles on powerup
  238. NOS Russian 6Pi6c Beam Tetrodes
  239. Hammond-labeled tubes - mfr?
  240. JJ 6V6s sturdiness
  241. KT66 questions
  242. Changing Vibroluxe Reverb Custom tubes
  243. 6v6, 6f6
  244. What do these tubes do and can I use them in a THD amp?
  245. dsl 100 bias problem
  246. 12AX7 testing
  247. Kt100
  248. Just curious...
  249. What can folks tell me about 6EJ7 ?
  250. Making a quad out of 2 matched pairs