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  1. Father's Cousin Louis's vintage 1920+ collection pictures!
  2. Tube Newbie needs help
  3. Need help
  4. Zytron Tubes
  5. Hapi2 Preamp
  6. Svetlana Cryo Tubes For Wave 8's
  7. Audio Note Preamp Circuit a good guess...
  8. Which one is the better design?
  9. Lab Power Supply for Glass Audio
  10. A joke?
  11. Need Advice on new Amp
  12. Using the 7591 or 7868
  13. Schematic of Audio Research VT 100
  14. Hermetically sealed Oil Filled resistors!
  15. Pre Amp schematic Audio Note M1
  16. opt impedance
  17. Schematic for Bogen DB130 ?
  18. SRPP Help Needed
  19. Schematic for Bogen DB130 ?
  20. Hot tube
  21. 6L6 Design Phase
  22. High Power Single Ended Amplifier Club
  23. Suggestions please..
  24. These are the best looking tube amps I have ever seen
  25. Sylvania News
  26. Will this work? "Mixed" 300B PPP IT
  27. Whats a Good 6L6 circuit?
  28. Guitar Tube Preamp
  29. Circlotron amps
  30. Mods on leak stereo 20
  31. When do the tubes have a fever?
  32. psu problem
  33. earthing
  34. 6V6 SET amp with 6SN7 driver
  35. 6n1p pre with active load
  36. buy tubes in the EU
  37. Neutral AC wave on O'scope
  38. Running power to tubes so as not to effect the audio signal
  39. el34 se schematic opinion
  40. EF86
  41. A Rimbaldi amp?
  42. SE or PP?
  43. PP 807's
  44. CCS loading first stage of DC coupled driver
  45. Search for a pre (RIAA+LINE+TUNER)with 12au7-12ax7.
  46. Film cap's
  47. Goertz: amp killer? or where to fix my Audio Research VSi55?
  48. help finding a good amp project?
  49. Yet another valve pre, comments?!
  50. Source for round and/or square transformer covers ??
  51. Ac30
  52. Some questions!
  53. filament source connection to DHT
  54. Use tubes for 2000V. power supply,
  55. mu / srpp / or CF?
  56. dB into voltage gain????
  57. Building a Tube Mic Pre
  58. Negative Voltage using tube rectifier?
  59. Reichert info
  60. really basic question
  61. Has anybody built 6BG6 or similar OTL amp?
  62. Old OP Transformer
  63. Need Advice, 820vct tranny?
  64. 811a Tube Cap Size
  65. need help with (now) not-working amp
  66. How about this 12au7 pre?
  67. SV811-3 SE : Lots of questions...
  68. Criticise please!
  69. 6n3p = ECC85 ???
  70. Any website reference for diy Audio Research REFERENCE amp and Manley Studio amp
  71. grid bias
  72. 12AT7 poweramp specs?
  73. valve pre amp
  74. what is the simplest possible triode amp?
  75. poweramp topology
  76. limits in transient time
  77. OPT Design
  78. Would this work
  79. manley pre schematic
  80. Heathkit FM3A
  81. Aleph-type CCS as plate load?
  82. Talbot Wright's Williamson mod (Heathkit W3-AM)
  83. Conrad-Johnson PV6 Preamp
  84. Mc275 opt manual rewinding
  85. Newbie asking help
  86. converting EF86 to take 12AX7
  87. B&K 650 tube tester not working, need help
  88. 5814/12AU7 Preamp?
  89. Grounded Grid pre amp-- help please
  90. Tube output indicator - EM84 or 6AF6G
  91. suggest circuit with gain of 60
  92. ready to mod the hell out of my asl wave 8's
  93. My First DIY - need big help!
  94. rectifier tube question
  95. Newbie with Tannoy grfs, helpme to choice a good amp to them.
  96. Mullard CV 4109 tube
  97. Pre PS Improvements?
  98. 6n7gt+300b
  99. Calculating DC coupled Single Ended Valve Amplifiers - Part #1
  100. 12ax7 preamp,need help.
  101. tube datasheets and amp sch
  102. How to check output transformers ?
  103. Filament of a 6AS7G
  104. triode=>pentode
  105. noob PSUD question...
  106. Detailed and Dry.
  107. Audion sterling phono stage - a good base for future upgrades?
  108. First Try on Tube Preamp
  109. EL34 in class AB2 triode mode push-pull?
  110. Heater Voltage Range, Hi or Low
  111. Donor H/K A224 Amp
  112. market for used tubes?
  113. Voltage Doubler Problem
  114. 6922 as a CCS, a question ?
  115. ALPS Pot
  116. Tube parameter ?
  117. tube life
  118. 7591A Tubes for sale?
  119. Restoring tired tubes
  120. My Bottlehead Tube Rig is done...for now
  121. Hammond Transformers
  122. Kenwood KW-70 Receiver
  123. Tube output buffer for DAC....needs advice!
  124. The Crackerbox Amp
  125. Antique Sound Lab MG-SPM25 Output Transformers
  126. el84 quad schematic..something is wrong...?
  127. really dumb question about SE 6bq5 operating point (triode)
  128. 6n7gt
  129. EE-Zee & Chee-Zee bias and offset adjustment idea
  130. Preamp Selection
  131. High frecuency oscillation when moving volume pot
  132. Choke load - how to plot loadline?
  133. Audio Research LS2
  134. Any Tube DIYers in Bay Area
  135. 6DJ8 preamp voltage?
  136. Diodes in Grid-Cathode Circuit
  137. To regulate or not?
  138. Odd tube behavior
  139. output txfr on cathode?
  140. tube preamp w/ XLR?
  141. ECC88 and PCC88 filament voltages
  142. Best tube choice for 1st SET project?
  143. Croft Vitale
  144. at last, amp finnished
  145. Silver micas as coupling caps?
  146. Valve-Heart Recording Studio
  147. Prototyping ( Breadboard ) Chassis Ideas and Suggestions
  148. old tubes
  149. where to place extra filter cap
  150. Troubleshooting a 6n1p linestage.
  151. 300BSE series
  152. Which triode is the best for preamp?
  153. AV8 and AV15 Vaic tubes
  154. Refridgerator trying to kill my Valve Amp
  155. When is capacitance making AC ripple a non-issue in B+ PS's?
  156. Quicksilver Bias Problem
  157. Looking for good book about phase split
  158. speaker protection fuse in Transcendent T8
  159. Shuguang Tube Factory(pics)
  160. "Pentodes for Dummies" needed.
  161. schematic for audio research classic 120 amps?
  162. Bouncing Ground
  163. Testing response....
  164. Impedance selection
  165. Heater To Cathode Potential
  166. uneven wound 50w OT 2 ideas...?
  167. 6B4G Amplifier Questions
  168. grounding heater/filament center
  169. Do I lose power when parafeeding?
  170. no ground problem
  171. Tube amp project
  172. bi-amping with gainclone + tubeamp
  173. Plitron/Vanderveen/KT88 Tube rectifier recommendation for 230mA?
  174. proposed 833 design
  175. Thyratron Circuit
  176. different phase invertors
  177. Tetrode or Pentode? / Tube info
  178. RECTIFIERLESS, is that possible?
  179. About high voltage regulated power supplies
  180. Stupid question about capacitors
  181. Time advanced error feedback correction
  182. My first tube amp
  183. copland 504
  184. 6D22S Damper Tubes
  185. resuscitating 60+ year old radio
  186. 6C45 in a phono amp? looks like this might be hot.
  187. quality of power supply
  188. Gassy Tube
  189. transformer coupling, magnetic amplifiers, grid leak current
  190. How low 6922/ECC88 can go?
  191. Question about PP EL34 power supply behaviour
  192. Tube amps and electric safety
  193. Transformer for a tube amp question
  194. Need some info on E88CC/6922
  195. strange "thing"
  196. Extra gain stage Marshall plexi 50watt
  197. Help with Hickok 539A tube tester repair..
  198. Micing tube amps
  199. Tube preamp huge DC thump!
  200. New speaker for transcendent T8
  201. choke winding
  202. MC phono preamp
  203. KYW's linestage (split from RIAA for life time)
  204. output transformer spice model
  205. cathode connection in directly heated triodes
  206. 50watt Plexi Again
  207. Anyone use ICs as input phase splitters for tube equipment
  208. Tube Sockets
  209. RIAA and Linestage for life time
  210. 211 Preamp
  211. Building a Marshall Plexi
  212. PL504 circuits.
  213. Tube Recommendation
  214. 6.3v 30A!?
  215. Simplest 6080 or 6AS7 OTL Project?
  216. Is 6N1P = 6N7 = ECC31
  217. EL34 in Pentode Class A?
  218. Wiring a 12au7
  219. BLue hue
  220. Choosing a suitable 50W cathode resistor
  221. 5687
  222. heathkit Schematic
  223. Precision S100 schematics?
  224. my RIAA stage. Any comment
  225. buffer circuits
  226. switchable 2.5k/5k primary ot
  227. Old grundig 3095 radio
  228. DIY Single Ended Triode Designs
  229. dog whistle
  230. Volume pot question
  231. Oil PP Cap
  232. commercial tube preamps
  233. Transformer Cover
  234. Harman-Kardon A-300 Amplifier
  235. Phono preamp- how to modify to get deeper LF?
  236. Thyratron heater supply?
  237. amp conversions
  238. Looking for Scott 200 photofacts or service manual
  239. 6ag7 metal pentodes
  240. EL84 Push-Pull Vieta A-225 opinion
  241. 5998 power amp question
  242. Which rectifier tube?
  243. tube preamp
  244. 6GT5 distortion problem
  245. tube preamps and gain
  246. Cathode Follower? Yay or nay?
  247. what the crap is this!?
  248. Safety Practices, General and Ultra-High Voltage
  249. Output transformer issues...
  250. Tube sockets with the same pin spacing as the tube

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