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  1. Hiwatt hi-gain 50 head biasing review
  2. Do different make 12AX7 tubes sound different? and why?
  3. 12at7 labeled as 12ax7
  4. Good Sounding Tubes
  5. New Tubes and disaster
  6. ECC 807 Brimar
  7. In at the deep end....
  8. Hiwatt hi-gain 50 head
  9. 6Y6GT in a Champ ?
  10. Bias probe
  11. No Sound on Fender Twin Pro All tube
  12. hammond tubes question
  13. Crate blue voodoo 60 watt 2-12 combo problems need advise
  14. Ampeg V4, maximizing headroom, needing real answers...
  15. Yellow Jacket Power Tube Adapter
  16. Hammond 7247
  17. The difference a tube can make
  18. What to do
  19. Laney AOR
  20. Tube Tests and Specs
  21. Duende Criatura?
  22. A Good New 12AY7?
  23. Fender Twin Preamp Question.
  24. Ampeg VL-503 not working tube arent glowing
  25. Ampeg SVT pro 3
  26. ECF80 / 6bl8 New ( not NOS ) ???
  27. 5881 question
  28. Useful Valve Test Reports
  29. Help identify a National Electronics 6l6 tube
  30. Tubes
  31. Phase Inverter tube capability
  32. Mesa boogie recto preamp tube placement values
  33. 12b4a ge jan
  34. 5AS4A acceptable Sub For 5U4G ?
  35. What NEW 12AX7 is BEST
  36. Anyone have info on A rcp 808aa tubetester?
  37. Variable cathode resistor
  38. The original chinese 12AX7's
  39. Making a solid state rectifier
  40. Tube amp death (auto bias-trouble)
  41. 12ax7 trouble
  42. Boy, do I HATE this (new tube rant)!
  43. Changing tubes on a Gibson Goldtone Ga-15
  44. 5u4 rattles on powerup
  45. NOS Russian 6Pi6c Beam Tetrodes
  46. Hammond-labeled tubes - mfr?
  47. JJ 6V6s sturdiness
  48. KT66 questions
  49. Changing Vibroluxe Reverb Custom tubes
  50. 6v6, 6f6
  51. What do these tubes do and can I use them in a THD amp?
  52. dsl 100 bias problem
  53. 12AX7 testing
  54. Kt100
  55. Just curious...
  56. What can folks tell me about 6EJ7 ?
  57. Making a quad out of 2 matched pairs
  58. Transconductance and tube performance
  59. Anyone ever try 6CW5s?
  60. 6G6G power tubes in a 5F2A ??
  61. Help with a tube substitution
  62. TV Tubes
  63. Wanted - High Power, High Voltage, Audio Frequency Transformer Manual
  64. Tube testing question
  65. Tube rectifier wear
  66. I am new to tubes and have been looking for help!
  67. Noisy power tubes
  68. Tube identification: manufacturer logo/markings database?
  69. Yay I got a Telefunken ECC83 for $10
  70. How much light in Power Tubes?
  71. 5Y4GA Rectifier
  72. Soft/Med/Hard Duet...
  73. 6V6 Tubes in a Fender Blues Deluxe Reissue?
  74. 6P6S - Any one used these?
  75. Non-Reissue Tung Sol 5881/6L6WGB, RCA Blackplate 6l6gc Unmatched Pair
  76. An experiment for gassy tubes
  77. 6gw8 replacement?
  78. What brand is this?
  79. 7868 Power Tubes?
  80. 1950s Genuine RCA Radio Tubes and Parts
  81. Tube Education for Blues Deluxe
  82. solid state
  83. 6CA7
  84. '65 Fender Princeton - Tube Suggestions?
  85. Blues Jr. 1 Hot tube
  86. temporary intense glow/dull flash on filament when heaters are turned on
  87. 12AX7 Voltage Problem(s)
  88. Poor little 8CG7
  89. Last word on Sovtek 5881 plate voltages, pleeeeeease.
  90. Using large value screen resistors w/ bypass caps
  91. 5cg8 triode/pentode amp ?
  92. 6SJ7
  93. New Tung-sol 6v6gt voltage
  94. Tube Rattle
  95. Tube Matching
  96. ECC808?
  97. 12ax7 that can handle 400v on the plate!
  98. 6V6G Specs?
  99. Replacement for 12AU6 Tube?
  100. NOS Recto vs New Recto
  101. 5c3 Biasing question
  102. 5881 tube retainers
  103. NOS Source
  104. Weber copper cap Module
  105. 7189A sub?
  106. 6bl8/ecf80 for gain stages
  107. 6L6 headroom, power, and saturation
  108. 6sl7 phase inverter gain stage
  109. 5879 preamp tube
  110. No more Groove Tubes
  111. 6CA4 (EZ81) questions from a n00b. (ELK Stageman bonus pics)
  112. what about Gold Dragon tube
  113. So I got some 6N1P/ECC88's? what should I do with them?
  114. Are these equivalent to anything you know of?
  115. Question about subbing 6V6s for 6L6s
  116. 6V6GT Questions: Fender Champ 5F1
  117. NOS tube guide
  118. Fender Deville 212 Noisey
  119. Caveat on using 6BQ5's in modern EL84 amps!
  120. torroidal trannies question
  121. 6Y6G ST tubes
  122. national gold line 6l6gc
  123. THD Reactive Rectifier
  124. Matched Tube Question
  125. 12AY7EH a hummer?
  126. 12AX7EH CF Failure
  127. circuit diagram
  128. Tube Primer
  129. Best Tubes for Fender Hot Rod Deluxe
  130. hi Fi tubes for geetar amps?
  131. Revolutionary or just another try?
  132. Techtube
  133. Fender/Groove connection
  134. New Tube & Parts "Burn In" - What ???
  135. 5879 preamp tube substitution
  136. Univox Amp Question
  137. reel to reel recorder tube swap
  138. Bugera 6262 help!!
  139. how do I set my Bias?
  140. 12AT7 for Reverb Driver & PI
  141. 6V6 in Class AB1 push-pull mode
  142. Broken GTEL84S (6BQ5) Tube - Works?
  143. Woohoo KT88s
  144. 6N2P-EV Tubes
  145. I have an 6F1P tube, what can I do with it?
  146. strange amp, questions
  147. Increasing distortioin in PP 6L6
  148. NOS Mullard 12AX7 prices
  149. Tube Diving
  150. crate vc 50 3x10
  151. Preamp tubes problem
  152. 6550 Tube Types
  153. 6N6p
  154. Traynor 40 YVC - 1 of 2 tubes out!
  155. Mullards El34's Vs. Svetlana 34's
  156. Do old guitar tubes have any value?
  157. tube ratings?
  158. marshall 800
  159. marshall 2203 tubes
  160. 5U4G vs 5U4GB
  161. 12ax7 Tung Sol(new) Problem
  162. We 350b?
  163. Jensen C12S Impedance?
  164. How to adjust your tube guitar amp
  165. need help changing from 2 to 3 prong Grounded cable for univox u45b project
  166. This Is Too Funny !
  167. Question about biasing my amp.
  168. sharp cutoff pentodes
  169. who used 6SL7?
  170. New Sensor "Tung-Sol" 6V6GT voltages - FYI
  171. stupid nOOb question
  172. Peavey Heritage VTX
  173. who use chinese tube ?
  174. getter problems
  175. Hello and Biasing question
  176. How long do tubes really last?
  177. Anyone got Data sheet for New Sensor "Tung-Sol 6V6GT"?
  178. How Do You Like The JJ X2 Mica 6L6GC
  179. Crate V16 new tubes and speaker
  180. USA Fender 12ax7
  181. Hand made triode; cool!
  182. best 12ax7 for distortion
  183. What is the best 6L6 for a V4?
  184. Brimar 6X5GT - What uF rating
  185. Tubes in Greece!
  186. New Mullard tubes
  187. how much difference does a matched set make?
  188. Where to find modern tube data sheets
  189. Cathode current meter.....build question
  190. Real Reissue KT66's
  191. frequency low down on smaller output tubes
  192. ...vacuum tube THEORY?
  193. How accurate is a "life test"?
  194. 6BQ6 schematic needed
  195. What about TV horizontal deflection tubes as output? I need some schematic with ...
  196. Getting new tubes for blues amp, neep an opinion
  197. Holy mother of God! auction gone nuts
  198. roll your own vacuum tubes
  199. 6V6s
  200. Pin 6 on octal power tubes?
  201. 6021 and 6112 Submini Tubes
  202. Bad Tubes
  203. NOS???
  204. 6V6: 12W or 13W plate dissipation?
  205. Oddball Tubes I'm Looking For
  206. My tube collection!
  207. JJ or EH 7591A?
  208. Wanted: Composite Loadline Chart for P-P 6550 in Class A
  209. Tube Cad / Spice Questions
  210. Eurotubes Any Problems ?
  211. the secret of NOS tubes...
  212. 6L6 replacements
  213. 6N1P Triode. Anyone Familiar?
  214. Lafayette tubes from England ?
  215. National 12AX8's, who made 'em?
  216. 6SJ7 to 12AX7 ??
  217. El34, 6l6, 6v6
  218. metal can 6v6's
  219. Change of Tubes for Marshall DSL 2000 100W
  220. Tung-sol RI 6550 how much can it take?
  221. KT88 / 6550 Bias Questions
  222. where do i start?
  223. Opinions on New Production EF86?
  224. OK! I need help!!!!
  225. Looking for 12ay7/6072 recommendations.
  226. Will bass damage a valve amp?
  227. Tube Recommendations?
  228. High gain pre-amp tube / valve - Question
  229. CBS Rectifier Identification Help Needed
  230. 5AR4 / GZ34 -- Best New Production Tubes?
  231. Who Made the "Realistic Lifetime" EL84?
  232. Old RCA 12ax7
  233. Weird tube death (see "salvaging" post also)
  234. Salvaging valuable tubes - (see "dead" tube post also)
  235. Old tubes - please advice needed (6SC7, 6J7)
  236. best Traynor YBA1 preamp tubes for early breakup?
  237. Opinions of Sovtek tubes
  238. tungsram THANK YOU !!!!!!!
  239. tungsram HELP!!!!
  240. Wit's end with underbiased super
  241. Tubes for AC30CCH
  242. Ampeg V4 and the ECC 832
  243. New Sensor at it again
  244. A Home-Made Triode!??!
  245. ECC83 vs ECC84
  246. The Brick Project
  247. How to ID 12AX7 manufacturer?
  248. Ck512ax
  249. tung sol 12ax7
  250. Is this too good to be true?