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