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  1. tube /valve Biasing
  2. 6CA7 Current Draw Increases
  3. Viking tube radio to guitar amp
  4. JJ 6v6s spare pins.
  5. high gain amp attenuating
  6. Will this output transformer work?
  7. Homemade Tube Tester
  8. Eico HF-20 50's 6L6 UL HIFI amp, convert for guitar or just try to sell it?
  9. 6v6 Grid Bias Circuit.
  10. Bias test points.
  11. Antique Sound Lab 6L6 Tube Up For Adoption
  12. Fender Twin Reverb 65 Reissue 6L6 Tube Replacement
  13. Any new EL84's lately with better reject rates?
  14. Tung-Sol 5881 - Hard, Medium, Soft?
  15. Can someone look over my biasing data to see if I've got it right.
  16. Help with tube data sheet, ecll800
  17. Help with tube data sheet, ecll800
  18. resistors as inrush limiters before full-wave diodes?
  19. Calibrating Tube Testers
  20. 6L6 Build Suggestions
  21. 5R4GY longevity in tube amps
  22. 5U4GB tube rectifier flash
  23. 6j6 & similar...
  24. Re-bonding tube bases
  25. replacing 6w8's with separate pre and output tubes
  26. Replacing 6L6 with 6V6?
  27. One of these things is not like the others...
  28. Russian made Groove Tubes?
  29. Awesome tube tester/curve tracer
  30. Tone stack Mod for Bogen H30
  31. help identifying this tube
  32. 6L6--- which brand best keeps the fenders sound
  33. More Bass/Less Mid mod for a Sovtek Mig 50h
  34. EL84 tubes
  35. Source for 9-pin (preamp) tube bases???
  36. Just used a 16 years old new tubes.
  37. Shuguang 6L6WGC - any info
  38. hardware for blackface fender fix
  39. Model t tubes
  40. Anybody looked at tube perveance values?
  41. Tube Storage
  42. When did the American Tung Sol factory cease production?
  43. New production 12AX7
  44. CE Distribution - policy change coming for defective tubes
  45. Sinorussotubeaphobia
  46. Triplett 3444 testing of a 12AX7
  47. Variations in Filament intensity
  48. Used power tubes
  49. New production Mullard El34's
  50. Origin of the 6L6GC?
  51. Sovtek 6CA7 fat bottle 90s era
  52. ID tubes from 1968 Traynor YVM-1
  53. Thoughts on Tung Sol reissue 12AX7 and reliability?
  54. Plate voltage of NOS RCA and NOS Tung Sol??
  55. Old Sovtek EL34G, similar tube?
  56. Current production Sovtek EL84M
  57. 12AX7 tube for overdriven analog organ
  58. ECC83 clipping
  59. Can KT88's be used in my amp?
  60. JJ 6L6GCs... WTF?
  61. Please suggest KT88 tubes
  62. wurlitzer branded general electric grey plate 12ax7
  63. Power Tube Swap Extravaganza!
  64. need a source for 6KG6A/ EL509 tubes
  65. how long do these last?
  66. What is this tube ID?
  67. Avo valve tester questions.
  68. winged C vs Svetlana el34s?
  69. Mercury Rectifier Tubes
  70. boutique/back yard tube maker in Japan [Youtube]
  71. cathode by-pass in push pull six tube hifi amp
  72. Nuvistors - what do you think?
  73. Bias question - 6L6
  74. Adhesive for Repairing 6V6GT Base?
  75. 5763 Tetrode - what do you think?
  76. NOS Metal Can 6V6 Tube Quesiton
  77. Franks Electron Tube Data Sheets site down?
  78. Tube amps
  79. rf/audio screen voltage ratings
  80. Help with value vintage Line Transformer Altec 2282
  81. Suggest preamp tube (12AX7)
  82. Anyone used Sovtek 12ax7wa - Had one crack
  83. ID this Tube?
  84. what power amp is this and who made it ????need schmatic
  85. Recommendations for EL34 for 520V on the plate
  86. Anyone else having issues with Winged C EL34's?
  87. JJ 5Y3?
  88. Retrovalves
  89. Question For Other NOS Tube Junkies
  90. mismatched 6v6 pairs; cathode bias
  91. Article - Return of the Vacuum Tube
  92. Tube-Based Boiler Controller / Thermostat?
  93. Any experience with this tube vendor?
  94. Blackface Deluxe Reverb No bias current reading
  95. Fender Bassman 10 Bias adjust conversion
  96. Proper Tube Removal Process?
  97. dead output transformer
  98. Shuguang data sheets
  99. Ordered JJ's for my Bugera 333XL
  100. The Tube Shop - anyone shopped there?
  101. Which 12AX7 for my 18 watt plexi build ?
  102. 12AH7A info
  103. Changing tubes in a Crate vc5310
  104. Winged C 6L6GC + TubeDepot
  105. WANTED: 2 6N6 "metal can" vacuum tubes
  106. 50Watt Vintage tube PA Tubes?
  107. Northern Electric Tubes
  108. Fooprints (symbols) for tubes for Orcad PCB designer
  109. Sovtek 12AX7s
  110. Octal tubes and microphonics?
  111. Tube amplifier for headphones
  112. Any Opinions on Octal Preamp Tubes?
  113. Cryo treatment of metal things with music coming out of them
  114. JJ EL84 failure
  115. Anybody Know About Ballast Tubes?
  116. 21.5 watts from a Pair of EL84's?
  117. Strange 5AR4 "Problem"
  118. Is cathode bias the same thing as "self" bias?
  119. Rectifier tube question
  120. Who made the Groove Tube KT-66HP?
  121. Bugera 333XL 212 Combo Tube Questions
  122. Senior TC130 tube tester chart
  123. Difference between 5AR$ and 5Y3 as Tweed Deluxe rectifier
  124. What to do with one of a pair of matched tubes
  125. Most reliable current production 5AR4/GZ34?
  126. Please recommend me tubes for my Bassman
  127. Peavey classic 30
  128. EF86 too weak. is it true what they say?
  129. JJ 6L6GC
  130. Will changing from a 5U4GB to ? lower my DC voltages?
  131. New 6Sl7
  132. Best New Issue EL34
  133. Upgrading Epiphone Valve Junior to a 7591 SE design?
  134. 6Y6s.....any good for audio?
  135. My Handsome Devil head
  136. 6AR6WA v. 6L6GC?
  137. EF86-type Sonic Differences.....
  138. New Issue 6L6
  139. 12AX7 HUM
  140. 6U8/ECF82 shielding question
  141. 7581a in Fender amps?
  142. 12AY7 as a DC-coupled cathode follower
  143. Vox AC 100 Mk2
  144. Tung-Sol 6L6STR fragile bottle top
  145. ECF80 or ECF82 for AF?
  146. SED Winged C Prices Way Up
  147. Tube Lineage?
  148. 12ax7LP substitute
  149. Chinese tubes
  150. KT66 Pin 1 variations - which one is accurate?
  151. Tung-Sol RI 6V6 - opinions/experience?
  152. Presently manufactured power tubes
  153. Very elementary question/Sovtek etc.
  154. 807s?
  155. Miniwatt, yes or no?
  156. RCA - customers advice wanted
  157. Chinese and Russian tubes
  158. SS Tube replacements...
  159. Telefunken in Fender amps?
  160. 7868-EH tubes any good? (New Electro Harmonix)
  161. What are the best 6550/KT88 tubes for 2011?
  162. Gold Lions (English)____Anyone familiar?
  163. Bench-testing vintage power tubes?
  164. 6v6 and 6v6GT
  165. cleaning old dirty tubes?
  166. Tube labeling: Paint? Etched?
  167. help plz: identifying old tubes
  168. Baldwin 12AX7 Made in USA AMY 31 13 29
  169. tube test just for 12Ax7?
  170. Sovtek 5Y3GT--good tube?
  171. Are you kidding me!? Really!?
  172. 6SQ7 vs. 6SF5
  173. Anybody have a legible TC-142 schematic?
  174. Woolly guitar sound
  175. 12AX7 Mullard/Philips/Amperex NOS
  176. New JJ 5U4GB whines on warm up.
  177. 7591 vs 6V6
  178. Help me identify some 12ax7 tubes, please?
  179. What does it take to break a tube pin?
  180. EZ81, 6CA4, EL84 Question.
  181. Russian 6P3S
  182. 7868 tube
  183. Screens Still weak in EH6V6?
  184. ken-rad 6l6g and 6v6gc from 1948?
  185. Groove Tubes Marshall distortion Confusion!! lol.
  186. New 12AY7 vs 5751, can't hear the difference...!
  187. B&K 707 Tube Tester - Problem with emmissions test
  188. 6550,6L6,12AX7 and distortion question
  189. Tube question
  190. Any reason I shouldn't...
  191. Teonex
  192. Eurotubes=Bad News
  193. Svetlana factory seconds
  194. Free tube datasheets
  195. RCA 6L6's ?
  196. "Soot" Inside EL84/6BQ5
  197. JCM800 Preamp Clone - Wierd Distortion (oscilloscope pic)
  198. "Shield" brand 6BQ5 Torched Screen Resistors
  199. Preamp tubes
  200. Jan Philips 6L6WGB
  201. Mesa Boogie tubes
  202. R.I.P. CV4004.....Any tube sob stories?
  203. 5Y3 EZ81?
  204. Tube Slag
  205. my NOS 5y3 is not working. bad tube?
  206. Old Hammond Tubes??
  207. Cabs suited for Vox AC50
  208. legacy vl100
  209. I need Help with this tube "8CW5/XL86
  210. Amp should be 100 watts but low on power, why?
  211. 6sl7/12sl7 experimentation ?s'
  212. Question about Tube Output Power
  213. I have some general Q's about tubes!
  214. Question about tube glow.
  215. Hiwatt hi-gain 50 head biasing review
  216. Do different make 12AX7 tubes sound different? and why?
  217. 12at7 labeled as 12ax7
  218. Good Sounding Tubes
  219. New Tubes and disaster
  220. ECC 807 Brimar
  221. In at the deep end....
  222. Hiwatt hi-gain 50 head
  223. 6Y6GT in a Champ ?
  224. Bias probe
  225. No Sound on Fender Twin Pro All tube
  226. hammond tubes question
  227. Crate blue voodoo 60 watt 2-12 combo problems need advise
  228. Ampeg V4, maximizing headroom, needing real answers...
  229. Yellow Jacket Power Tube Adapter
  230. Hammond 7247
  231. The difference a tube can make
  232. What to do
  233. Laney AOR
  234. Tube Tests and Specs
  235. Duende Criatura?
  236. A Good New 12AY7?
  237. Fender Twin Preamp Question.
  238. Ampeg VL-503 not working tube arent glowing
  239. Ampeg SVT pro 3
  240. ECF80 / 6bl8 New ( not NOS ) ???
  241. 5881 question
  242. Useful Valve Test Reports
  243. Help identify a National Electronics 6l6 tube
  244. Tubes
  245. Phase Inverter tube capability
  246. Mesa boogie recto preamp tube placement values
  247. 12b4a ge jan
  248. 5AS4A acceptable Sub For 5U4G ?
  249. What NEW 12AX7 is BEST
  250. Anyone have info on A rcp 808aa tubetester?