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  1. Replacing 6L6 with 6V6?
  2. One of these things is not like the others...
  3. Russian made Groove Tubes?
  4. Awesome tube tester/curve tracer
  5. Tone stack Mod for Bogen H30
  6. help identifying this tube
  7. 6L6--- which brand best keeps the fenders sound
  8. More Bass/Less Mid mod for a Sovtek Mig 50h
  9. EL84 tubes
  10. Source for 9-pin (preamp) tube bases???
  11. Just used a 16 years old new tubes.
  12. Shuguang 6L6WGC - any info
  13. hardware for blackface fender fix
  14. Model t tubes
  15. Anybody looked at tube perveance values?
  16. Tube Storage
  17. When did the American Tung Sol factory cease production?
  18. New production 12AX7
  19. CE Distribution - policy change coming for defective tubes
  20. Sinorussotubeaphobia
  21. Triplett 3444 testing of a 12AX7
  22. Variations in Filament intensity
  23. Used power tubes
  24. New production Mullard El34's
  25. Origin of the 6L6GC?
  26. Sovtek 6CA7 fat bottle 90s era
  27. ID tubes from 1968 Traynor YVM-1
  28. Thoughts on Tung Sol reissue 12AX7 and reliability?
  29. Plate voltage of NOS RCA and NOS Tung Sol??
  30. Old Sovtek EL34G, similar tube?
  31. Current production Sovtek EL84M
  32. 12AX7 tube for overdriven analog organ
  33. ECC83 clipping
  34. Can KT88's be used in my amp?
  35. JJ 6L6GCs... WTF?
  36. Please suggest KT88 tubes
  37. wurlitzer branded general electric grey plate 12ax7
  38. Power Tube Swap Extravaganza!
  39. need a source for 6KG6A/ EL509 tubes
  40. how long do these last?
  41. What is this tube ID?
  42. Avo valve tester questions.
  43. winged C vs Svetlana el34s?
  44. Mercury Rectifier Tubes
  45. boutique/back yard tube maker in Japan [Youtube]
  46. cathode by-pass in push pull six tube hifi amp
  47. Nuvistors - what do you think?
  48. Bias question - 6L6
  49. Adhesive for Repairing 6V6GT Base?
  50. 5763 Tetrode - what do you think?
  51. NOS Metal Can 6V6 Tube Quesiton
  52. Franks Electron Tube Data Sheets site down?
  53. Tube amps
  54. rf/audio screen voltage ratings
  55. Help with value vintage Line Transformer Altec 2282
  56. Suggest preamp tube (12AX7)
  57. Anyone used Sovtek 12ax7wa - Had one crack
  58. ID this Tube?
  59. what power amp is this and who made it ????need schmatic
  60. Recommendations for EL34 for 520V on the plate
  61. Anyone else having issues with Winged C EL34's?
  62. JJ 5Y3?
  63. Retrovalves
  64. Question For Other NOS Tube Junkies
  65. mismatched 6v6 pairs; cathode bias
  66. Article - Return of the Vacuum Tube
  67. Tube-Based Boiler Controller / Thermostat?
  68. Any experience with this tube vendor?
  69. Blackface Deluxe Reverb No bias current reading
  70. Fender Bassman 10 Bias adjust conversion
  71. Proper Tube Removal Process?
  72. dead output transformer
  73. Shuguang data sheets
  74. Ordered JJ's for my Bugera 333XL
  75. The Tube Shop - anyone shopped there?
  76. Which 12AX7 for my 18 watt plexi build ?
  77. 12AH7A info
  78. Changing tubes in a Crate vc5310
  79. Winged C 6L6GC + TubeDepot
  80. WANTED: 2 6N6 "metal can" vacuum tubes
  81. 50Watt Vintage tube PA Tubes?
  82. Northern Electric Tubes
  83. Fooprints (symbols) for tubes for Orcad PCB designer
  84. Sovtek 12AX7s
  85. Octal tubes and microphonics?
  86. Tube amplifier for headphones
  87. Any Opinions on Octal Preamp Tubes?
  88. Cryo treatment of metal things with music coming out of them
  89. JJ EL84 failure
  90. Anybody Know About Ballast Tubes?
  91. 21.5 watts from a Pair of EL84's?
  92. Strange 5AR4 "Problem"
  93. Is cathode bias the same thing as "self" bias?
  94. Rectifier tube question
  95. Who made the Groove Tube KT-66HP?
  96. Bugera 333XL 212 Combo Tube Questions
  97. Senior TC130 tube tester chart
  98. Difference between 5AR$ and 5Y3 as Tweed Deluxe rectifier
  99. What to do with one of a pair of matched tubes
  100. Most reliable current production 5AR4/GZ34?
  101. Please recommend me tubes for my Bassman
  102. Peavey classic 30
  103. EF86 too weak. is it true what they say?
  104. JJ 6L6GC
  105. Will changing from a 5U4GB to ? lower my DC voltages?
  106. New 6Sl7
  107. Best New Issue EL34
  108. Upgrading Epiphone Valve Junior to a 7591 SE design?
  109. 6Y6s.....any good for audio?
  110. My Handsome Devil head
  111. 6AR6WA v. 6L6GC?
  112. EF86-type Sonic Differences.....
  113. New Issue 6L6
  114. 12AX7 HUM
  115. 6U8/ECF82 shielding question
  116. 7581a in Fender amps?
  117. 12AY7 as a DC-coupled cathode follower
  118. Vox AC 100 Mk2
  119. Tung-Sol 6L6STR fragile bottle top
  120. ECF80 or ECF82 for AF?
  121. SED Winged C Prices Way Up
  122. Tube Lineage?
  123. 12ax7LP substitute
  124. Chinese tubes
  125. KT66 Pin 1 variations - which one is accurate?
  126. Tung-Sol RI 6V6 - opinions/experience?
  127. Presently manufactured power tubes
  128. Very elementary question/Sovtek etc.
  129. 807s?
  130. Miniwatt, yes or no?
  131. RCA - customers advice wanted
  132. Chinese and Russian tubes
  133. SS Tube replacements...
  134. Telefunken in Fender amps?
  135. 7868-EH tubes any good? (New Electro Harmonix)
  136. What are the best 6550/KT88 tubes for 2011?
  137. Gold Lions (English)____Anyone familiar?
  138. Bench-testing vintage power tubes?
  139. 6v6 and 6v6GT
  140. cleaning old dirty tubes?
  141. Tube labeling: Paint? Etched?
  142. help plz: identifying old tubes
  143. Baldwin 12AX7 Made in USA AMY 31 13 29
  144. tube test just for 12Ax7?
  145. Sovtek 5Y3GT--good tube?
  146. Are you kidding me!? Really!?
  147. 6SQ7 vs. 6SF5
  148. Anybody have a legible TC-142 schematic?
  149. Woolly guitar sound
  150. 12AX7 Mullard/Philips/Amperex NOS
  151. New JJ 5U4GB whines on warm up.
  152. 7591 vs 6V6
  153. Help me identify some 12ax7 tubes, please?
  154. What does it take to break a tube pin?
  155. EZ81, 6CA4, EL84 Question.
  156. Russian 6P3S
  157. 7868 tube
  158. Screens Still weak in EH6V6?
  159. ken-rad 6l6g and 6v6gc from 1948?
  160. Groove Tubes Marshall distortion Confusion!! lol.
  161. New 12AY7 vs 5751, can't hear the difference...!
  162. B&K 707 Tube Tester - Problem with emmissions test
  163. 6550,6L6,12AX7 and distortion question
  164. Tube question
  165. Any reason I shouldn't...
  166. Teonex
  167. Eurotubes=Bad News
  168. Svetlana factory seconds
  169. Free tube datasheets
  170. RCA 6L6's ?
  171. "Soot" Inside EL84/6BQ5
  172. JCM800 Preamp Clone - Wierd Distortion (oscilloscope pic)
  173. "Shield" brand 6BQ5 Torched Screen Resistors
  174. Preamp tubes
  175. Jan Philips 6L6WGB
  176. Mesa Boogie tubes
  177. R.I.P. CV4004.....Any tube sob stories?
  178. 5Y3 EZ81?
  179. Tube Slag
  180. my NOS 5y3 is not working. bad tube?
  181. Old Hammond Tubes??
  182. Cabs suited for Vox AC50
  183. legacy vl100
  184. I need Help with this tube "8CW5/XL86
  185. Amp should be 100 watts but low on power, why?
  186. 6sl7/12sl7 experimentation ?s'
  187. Question about Tube Output Power
  188. I have some general Q's about tubes!
  189. Question about tube glow.
  190. Hiwatt hi-gain 50 head biasing review
  191. Do different make 12AX7 tubes sound different? and why?
  192. 12at7 labeled as 12ax7
  193. Good Sounding Tubes
  194. New Tubes and disaster
  195. ECC 807 Brimar
  196. In at the deep end....
  197. Hiwatt hi-gain 50 head
  198. 6Y6GT in a Champ ?
  199. Bias probe
  200. No Sound on Fender Twin Pro All tube
  201. hammond tubes question
  202. Crate blue voodoo 60 watt 2-12 combo problems need advise
  203. Ampeg V4, maximizing headroom, needing real answers...
  204. Yellow Jacket Power Tube Adapter
  205. Hammond 7247
  206. The difference a tube can make
  207. What to do
  208. Laney AOR
  209. Tube Tests and Specs
  210. Duende Criatura?
  211. A Good New 12AY7?
  212. Fender Twin Preamp Question.
  213. Ampeg VL-503 not working tube arent glowing
  214. Ampeg SVT pro 3
  215. ECF80 / 6bl8 New ( not NOS ) ???
  216. 5881 question
  217. Useful Valve Test Reports
  218. Help identify a National Electronics 6l6 tube
  219. Tubes
  220. Phase Inverter tube capability
  221. Mesa boogie recto preamp tube placement values
  222. 12b4a ge jan
  223. 5AS4A acceptable Sub For 5U4G ?
  224. What NEW 12AX7 is BEST
  225. Anyone have info on A rcp 808aa tubetester?
  226. Variable cathode resistor
  227. The original chinese 12AX7's
  228. Making a solid state rectifier
  229. Tube amp death (auto bias-trouble)
  230. 12ax7 trouble
  231. Boy, do I HATE this (new tube rant)!
  232. Changing tubes on a Gibson Goldtone Ga-15
  233. 5u4 rattles on powerup
  234. NOS Russian 6Pi6c Beam Tetrodes
  235. Hammond-labeled tubes - mfr?
  236. JJ 6V6s sturdiness
  237. KT66 questions
  238. Changing Vibroluxe Reverb Custom tubes
  239. 6v6, 6f6
  240. What do these tubes do and can I use them in a THD amp?
  241. dsl 100 bias problem
  242. 12AX7 testing
  243. Kt100
  244. Just curious...
  245. What can folks tell me about 6EJ7 ?
  246. Making a quad out of 2 matched pairs
  247. Transconductance and tube performance
  248. Anyone ever try 6CW5s?
  249. 6G6G power tubes in a 5F2A ??
  250. Help with a tube substitution