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  1. 6F12P
  2. Suggestions for 30-40v power supply for micro tubes.
  3. Laney IronHeart
  4. Matching tubes at home Q?
  5. Guild thunder 1 help
  6. Dropping B+ substantially
  7. tube /valve Biasing
  8. 6CA7 Current Draw Increases
  9. Viking tube radio to guitar amp
  10. JJ 6v6s spare pins.
  11. high gain amp attenuating
  12. Will this output transformer work?
  13. Homemade Tube Tester
  14. Eico HF-20 50's 6L6 UL HIFI amp, convert for guitar or just try to sell it?
  15. 6v6 Grid Bias Circuit.
  16. Bias test points.
  17. Antique Sound Lab 6L6 Tube Up For Adoption
  18. Fender Twin Reverb 65 Reissue 6L6 Tube Replacement
  19. Any new EL84's lately with better reject rates?
  20. Tung-Sol 5881 - Hard, Medium, Soft?
  21. Can someone look over my biasing data to see if I've got it right.
  22. Help with tube data sheet, ecll800
  23. Help with tube data sheet, ecll800
  24. resistors as inrush limiters before full-wave diodes?
  25. Calibrating Tube Testers
  26. 6L6 Build Suggestions
  27. 5R4GY longevity in tube amps
  28. 5U4GB tube rectifier flash
  29. 6j6 & similar...
  30. Re-bonding tube bases
  31. replacing 6w8's with separate pre and output tubes
  32. Replacing 6L6 with 6V6?
  33. One of these things is not like the others...
  34. Russian made Groove Tubes?
  35. Awesome tube tester/curve tracer
  36. Tone stack Mod for Bogen H30
  37. help identifying this tube
  38. 6L6--- which brand best keeps the fenders sound
  39. More Bass/Less Mid mod for a Sovtek Mig 50h
  40. EL84 tubes
  41. Source for 9-pin (preamp) tube bases???
  42. Just used a 16 years old new tubes.
  43. Shuguang 6L6WGC - any info
  44. hardware for blackface fender fix
  45. Model t tubes
  46. Anybody looked at tube perveance values?
  47. Tube Storage
  48. When did the American Tung Sol factory cease production?
  49. New production 12AX7
  50. CE Distribution - policy change coming for defective tubes
  51. Sinorussotubeaphobia
  52. Triplett 3444 testing of a 12AX7
  53. Variations in Filament intensity
  54. Used power tubes
  55. New production Mullard El34's
  56. Origin of the 6L6GC?
  57. Sovtek 6CA7 fat bottle 90s era
  58. ID tubes from 1968 Traynor YVM-1
  59. Thoughts on Tung Sol reissue 12AX7 and reliability?
  60. Plate voltage of NOS RCA and NOS Tung Sol??
  61. Old Sovtek EL34G, similar tube?
  62. Current production Sovtek EL84M
  63. 12AX7 tube for overdriven analog organ
  64. ECC83 clipping
  65. Can KT88's be used in my amp?
  66. JJ 6L6GCs... WTF?
  67. Please suggest KT88 tubes
  68. wurlitzer branded general electric grey plate 12ax7
  69. Power Tube Swap Extravaganza!
  70. need a source for 6KG6A/ EL509 tubes
  71. how long do these last?
  72. What is this tube ID?
  73. Avo valve tester questions.
  74. winged C vs Svetlana el34s?
  75. Mercury Rectifier Tubes
  76. boutique/back yard tube maker in Japan [Youtube]
  77. cathode by-pass in push pull six tube hifi amp
  78. Nuvistors - what do you think?
  79. Bias question - 6L6
  80. Adhesive for Repairing 6V6GT Base?
  81. 5763 Tetrode - what do you think?
  82. NOS Metal Can 6V6 Tube Quesiton
  83. Franks Electron Tube Data Sheets site down?
  84. Tube amps
  85. rf/audio screen voltage ratings
  86. Help with value vintage Line Transformer Altec 2282
  87. Suggest preamp tube (12AX7)
  88. Anyone used Sovtek 12ax7wa - Had one crack
  89. ID this Tube?
  90. what power amp is this and who made it ????need schmatic
  91. Recommendations for EL34 for 520V on the plate
  92. Anyone else having issues with Winged C EL34's?
  93. JJ 5Y3?
  94. Retrovalves
  95. Question For Other NOS Tube Junkies
  96. mismatched 6v6 pairs; cathode bias
  97. Article - Return of the Vacuum Tube
  98. Tube-Based Boiler Controller / Thermostat?
  99. Any experience with this tube vendor?
  100. Blackface Deluxe Reverb No bias current reading
  101. Fender Bassman 10 Bias adjust conversion
  102. Proper Tube Removal Process?
  103. dead output transformer
  104. Shuguang data sheets
  105. Ordered JJ's for my Bugera 333XL
  106. The Tube Shop - anyone shopped there?
  107. Which 12AX7 for my 18 watt plexi build ?
  108. 12AH7A info
  109. Changing tubes in a Crate vc5310
  110. Winged C 6L6GC + TubeDepot
  111. WANTED: 2 6N6 "metal can" vacuum tubes
  112. 50Watt Vintage tube PA Tubes?
  113. Northern Electric Tubes
  114. Fooprints (symbols) for tubes for Orcad PCB designer
  115. Sovtek 12AX7s
  116. Octal tubes and microphonics?
  117. Tube amplifier for headphones
  118. Any Opinions on Octal Preamp Tubes?
  119. Cryo treatment of metal things with music coming out of them
  120. JJ EL84 failure
  121. Anybody Know About Ballast Tubes?
  122. 21.5 watts from a Pair of EL84's?
  123. Strange 5AR4 "Problem"
  124. Is cathode bias the same thing as "self" bias?
  125. Rectifier tube question
  126. Who made the Groove Tube KT-66HP?
  127. Bugera 333XL 212 Combo Tube Questions
  128. Senior TC130 tube tester chart
  129. Difference between 5AR$ and 5Y3 as Tweed Deluxe rectifier
  130. What to do with one of a pair of matched tubes
  131. Most reliable current production 5AR4/GZ34?
  132. Please recommend me tubes for my Bassman
  133. Peavey classic 30
  134. EF86 too weak. is it true what they say?
  135. JJ 6L6GC
  136. Will changing from a 5U4GB to ? lower my DC voltages?
  137. New 6Sl7
  138. Best New Issue EL34
  139. Upgrading Epiphone Valve Junior to a 7591 SE design?
  140. 6Y6s.....any good for audio?
  141. My Handsome Devil head
  142. 6AR6WA v. 6L6GC?
  143. EF86-type Sonic Differences.....
  144. New Issue 6L6
  145. 12AX7 HUM
  146. 6U8/ECF82 shielding question
  147. 7581a in Fender amps?
  148. 12AY7 as a DC-coupled cathode follower
  149. Vox AC 100 Mk2
  150. Tung-Sol 6L6STR fragile bottle top
  151. ECF80 or ECF82 for AF?
  152. SED Winged C Prices Way Up
  153. Tube Lineage?
  154. 12ax7LP substitute
  155. Chinese tubes
  156. KT66 Pin 1 variations - which one is accurate?
  157. Tung-Sol RI 6V6 - opinions/experience?
  158. Presently manufactured power tubes
  159. Very elementary question/Sovtek etc.
  160. 807s?
  161. Miniwatt, yes or no?
  162. RCA - customers advice wanted
  163. Chinese and Russian tubes
  164. SS Tube replacements...
  165. Telefunken in Fender amps?
  166. 7868-EH tubes any good? (New Electro Harmonix)
  167. What are the best 6550/KT88 tubes for 2011?
  168. Gold Lions (English)____Anyone familiar?
  169. Bench-testing vintage power tubes?
  170. 6v6 and 6v6GT
  171. cleaning old dirty tubes?
  172. Tube labeling: Paint? Etched?
  173. help plz: identifying old tubes
  174. Baldwin 12AX7 Made in USA AMY 31 13 29
  175. tube test just for 12Ax7?
  176. Sovtek 5Y3GT--good tube?
  177. Are you kidding me!? Really!?
  178. 6SQ7 vs. 6SF5
  179. Anybody have a legible TC-142 schematic?
  180. Woolly guitar sound
  181. 12AX7 Mullard/Philips/Amperex NOS
  182. New JJ 5U4GB whines on warm up.
  183. 7591 vs 6V6
  184. Help me identify some 12ax7 tubes, please?
  185. What does it take to break a tube pin?
  186. EZ81, 6CA4, EL84 Question.
  187. Russian 6P3S
  188. 7868 tube
  189. Screens Still weak in EH6V6?
  190. ken-rad 6l6g and 6v6gc from 1948?
  191. Groove Tubes Marshall distortion Confusion!! lol.
  192. New 12AY7 vs 5751, can't hear the difference...!
  193. B&K 707 Tube Tester - Problem with emmissions test
  194. 6550,6L6,12AX7 and distortion question
  195. Tube question
  196. Any reason I shouldn't...
  197. Teonex
  198. Eurotubes=Bad News
  199. Svetlana factory seconds
  200. Free tube datasheets
  201. RCA 6L6's ?
  202. "Soot" Inside EL84/6BQ5
  203. JCM800 Preamp Clone - Wierd Distortion (oscilloscope pic)
  204. "Shield" brand 6BQ5 Torched Screen Resistors
  205. Preamp tubes
  206. Jan Philips 6L6WGB
  207. Mesa Boogie tubes
  208. R.I.P. CV4004.....Any tube sob stories?
  209. 5Y3 EZ81?
  210. Tube Slag
  211. my NOS 5y3 is not working. bad tube?
  212. Old Hammond Tubes??
  213. Cabs suited for Vox AC50
  214. legacy vl100
  215. I need Help with this tube "8CW5/XL86
  216. Amp should be 100 watts but low on power, why?
  217. 6sl7/12sl7 experimentation ?s'
  218. Question about Tube Output Power
  219. I have some general Q's about tubes!
  220. Question about tube glow.
  221. Hiwatt hi-gain 50 head biasing review
  222. Do different make 12AX7 tubes sound different? and why?
  223. 12at7 labeled as 12ax7
  224. Good Sounding Tubes
  225. New Tubes and disaster
  226. ECC 807 Brimar
  227. In at the deep end....
  228. Hiwatt hi-gain 50 head
  229. 6Y6GT in a Champ ?
  230. Bias probe
  231. No Sound on Fender Twin Pro All tube
  232. hammond tubes question
  233. Crate blue voodoo 60 watt 2-12 combo problems need advise
  234. Ampeg V4, maximizing headroom, needing real answers...
  235. Yellow Jacket Power Tube Adapter
  236. Hammond 7247
  237. The difference a tube can make
  238. What to do
  239. Laney AOR
  240. Tube Tests and Specs
  241. Duende Criatura?
  242. A Good New 12AY7?
  243. Fender Twin Preamp Question.
  244. Ampeg VL-503 not working tube arent glowing
  245. Ampeg SVT pro 3
  246. ECF80 / 6bl8 New ( not NOS ) ???
  247. 5881 question
  248. Useful Valve Test Reports
  249. Help identify a National Electronics 6l6 tube
  250. Tubes