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  1. AB1 or 2?
  2. help with restoring amp
  3. Tube preamplifier with PCC88
  4. Tube amplifier 300b proyect
  5. linestage needed
  6. 5687 Tube - best choice
  7. Fisher 500c - Trouble shooting tuner section
  8. Morgan Jones book to swap
  9. gu-48 PP
  10. Taylor 45b Gm Problem
  11. 5687, ECC99, 7119, or E182CC??
  12. Bell Sound Systems Old Gem
  13. Mu-follower current capability?
  14. Bogen M330A Tube PA Amp for Guitar
  15. Filaments voltage question
  16. Is it Good to regulate supplies?
  17. Damper Diodes
  18. Fisher X-100 transformers
  19. Some questions about C4S CCS adjustment.
  20. Lowther LL18S stereo power amplifier - circuit diagram?
  21. Problem with mouting choke underneath chassis?
  22. How accurate is RMAA distortion measurement?
  23. 801
  24. CROFT Eminent Audio
  25. Any good flea-watt SET designs?
  26. PTP wiring
  27. switching regulators
  28. Push Pull Power supply. to Tube or not to?
  29. Kepco 615B Bench Supply pix
  30. Standart gains and voltage levels for standart audio eq
  31. How do I measure OPT impedance?
  32. Using TFA 204 transformers for SE EL84?
  33. Help on 311-CH triode tube
  34. Shots of my GG pre amp!!
  35. 6C45Pi Microphone Preamp
  36. cf topology lessons... pls help
  37. Father's Cousin Louis's vintage 1920+ collection pictures!
  38. Tube Newbie needs help
  39. Need help
  40. Zytron Tubes
  41. Hapi2 Preamp
  42. Svetlana Cryo Tubes For Wave 8's
  43. Audio Note Preamp Circuit a good guess...
  44. Which one is the better design?
  45. Lab Power Supply for Glass Audio
  46. A joke?
  47. Need Advice on new Amp
  48. Using the 7591 or 7868
  49. Schematic of Audio Research VT 100
  50. Hermetically sealed Oil Filled resistors!
  51. Pre Amp schematic Audio Note M1
  52. opt impedance
  53. Schematic for Bogen DB130 ?
  54. SRPP Help Needed
  55. Schematic for Bogen DB130 ?
  56. Hot tube
  57. 6L6 Design Phase
  58. High Power Single Ended Amplifier Club
  59. Suggestions please..
  60. These are the best looking tube amps I have ever seen
  61. Sylvania News
  62. Will this work? "Mixed" 300B PPP IT
  63. Whats a Good 6L6 circuit?
  64. Guitar Tube Preamp
  65. Circlotron amps
  66. Mods on leak stereo 20
  67. When do the tubes have a fever?
  68. psu problem
  69. earthing
  70. 6V6 SET amp with 6SN7 driver
  71. 6n1p pre with active load
  72. buy tubes in the EU
  73. Neutral AC wave on O'scope
  74. Running power to tubes so as not to effect the audio signal
  75. el34 se schematic opinion
  76. Ef86
  77. A Rimbaldi amp?
  78. SE or PP?
  79. PP 807's
  80. CCS loading first stage of DC coupled driver
  81. Search for a pre (RIAA+LINE+TUNER)with 12au7-12ax7.
  82. Film cap's
  83. Goertz: amp killer? or where to fix my Audio Research VSi55?
  84. help finding a good amp project?
  85. Yet another valve pre, comments?!
  86. Source for round and/or square transformer covers ??
  87. Ac30
  88. Some questions!
  89. filament source connection to DHT
  90. Use tubes for 2000V. power supply,
  91. mu / srpp / or CF?
  92. dB into voltage gain????
  93. Building a Tube Mic Pre
  94. Negative Voltage using tube rectifier?
  95. Reichert info
  96. really basic question
  97. Has anybody built 6BG6 or similar OTL amp?
  98. Old OP Transformer
  99. Need Advice, 820vct tranny?
  100. 811a Tube Cap Size
  101. need help with (now) not-working amp
  102. How about this 12au7 pre?
  103. SV811-3 SE : Lots of questions...
  104. Criticise please!
  105. 6n3p = ECC85 ???
  106. Any website reference for diy Audio Research REFERENCE amp and Manley Studio amp
  107. grid bias
  108. 12AT7 poweramp specs?
  109. valve pre amp
  110. what is the simplest possible triode amp?
  111. poweramp topology
  112. limits in transient time
  113. OPT Design
  114. Would this work
  115. manley pre schematic
  116. Heathkit FM3A
  117. Aleph-type CCS as plate load?
  118. Talbot Wright's Williamson mod (Heathkit W3-AM)
  119. Conrad-Johnson PV6 Preamp
  120. Mc275 opt manual rewinding
  121. Newbie asking help
  122. converting EF86 to take 12AX7
  123. B&K 650 tube tester not working, need help
  124. 5814/12AU7 Preamp?
  125. Grounded Grid pre amp-- help please
  126. Tube output indicator - EM84 or 6AF6G
  127. suggest circuit with gain of 60
  128. ready to mod the hell out of my asl wave 8's
  129. My First DIY - need big help!
  130. rectifier tube question
  131. Newbie with Tannoy grfs, helpme to choice a good amp to them.
  132. Mullard CV 4109 tube
  133. Pre PS Improvements?
  134. 6n7gt+300b
  135. Calculating DC coupled Single Ended Valve Amplifiers - Part #1
  136. 12ax7 preamp,need help.
  137. tube datasheets and amp sch
  138. How to check output transformers ?
  139. Filament of a 6AS7G
  140. triode=>pentode
  141. noob PSUD question...
  142. Detailed and Dry.
  143. Audion sterling phono stage - a good base for future upgrades?
  144. First Try on Tube Preamp
  145. EL34 in class AB2 triode mode push-pull?
  146. Heater Voltage Range, Hi or Low
  147. Donor H/K A224 Amp
  148. market for used tubes?
  149. Voltage Doubler Problem
  150. 6922 as a CCS, a question ?
  151. ALPS Pot
  152. Tube parameter ?
  153. tube life
  154. 7591A Tubes for sale?
  155. Restoring tired tubes
  156. My Bottlehead Tube Rig is done...for now
  157. Hammond Transformers
  158. Kenwood KW-70 Receiver
  159. Tube output buffer for DAC....needs advice!
  160. The Crackerbox Amp
  161. Antique Sound Lab MG-SPM25 Output Transformers
  162. el84 quad schematic..something is wrong...?
  163. really dumb question about SE 6bq5 operating point (triode)
  164. 6n7gt
  165. EE-Zee & Chee-Zee bias and offset adjustment idea
  166. Preamp Selection
  167. High frecuency oscillation when moving volume pot
  168. Choke load - how to plot loadline?
  169. Audio Research LS2
  170. Any Tube DIYers in Bay Area
  171. 6DJ8 preamp voltage?
  172. Diodes in Grid-Cathode Circuit
  173. To regulate or not?
  174. Odd tube behavior
  175. output txfr on cathode?
  176. tube preamp w/ XLR?
  177. ECC88 and PCC88 filament voltages
  178. Best tube choice for 1st SET project?
  179. Croft Vitale
  180. at last, amp finnished
  181. Silver micas as coupling caps?
  182. Valve-Heart Recording Studio
  183. Prototyping ( Breadboard ) Chassis Ideas and Suggestions
  184. old tubes
  185. where to place extra filter cap
  186. Troubleshooting a 6n1p linestage.
  187. 300BSE series
  188. Which triode is the best for preamp?
  189. AV8 and AV15 Vaic tubes
  190. Refridgerator trying to kill my Valve Amp
  191. When is capacitance making AC ripple a non-issue in B+ PS's?
  192. Quicksilver Bias Problem
  193. Looking for good book about phase split
  194. speaker protection fuse in Transcendent T8
  195. Shuguang Tube Factory(pics)
  196. "Pentodes for Dummies" needed.
  197. schematic for audio research classic 120 amps?
  198. Bouncing Ground
  199. Testing response....
  200. Impedance selection
  201. Heater To Cathode Potential
  202. uneven wound 50w OT 2 ideas...?
  203. 6B4G Amplifier Questions
  204. grounding heater/filament center
  205. Do I lose power when parafeeding?
  206. no ground problem
  207. Tube amp project
  208. bi-amping with gainclone + tubeamp
  209. Plitron/Vanderveen/KT88 Tube rectifier recommendation for 230mA?
  210. proposed 833 design
  211. Thyratron Circuit
  212. different phase invertors
  213. Tetrode or Pentode? / Tube info
  214. RECTIFIERLESS, is that possible?
  215. About high voltage regulated power supplies
  216. Stupid question about capacitors
  217. Time advanced error feedback correction
  218. My first tube amp
  219. copland 504
  220. 6D22S Damper Tubes
  221. resuscitating 60+ year old radio
  222. 6C45 in a phono amp? looks like this might be hot.
  223. quality of power supply
  224. Gassy Tube
  225. transformer coupling, magnetic amplifiers, grid leak current
  226. How low 6922/ECC88 can go?
  227. Question about PP EL34 power supply behaviour
  228. Tube amps and electric safety
  229. Transformer for a tube amp question
  230. Need some info on E88CC/6922
  231. strange "thing"
  232. Extra gain stage Marshall plexi 50watt
  233. Help with Hickok 539A tube tester repair..
  234. Micing tube amps
  235. Tube preamp huge DC thump!
  236. New speaker for transcendent T8
  237. choke winding
  238. MC phono preamp
  239. KYW's linestage (split from RIAA for life time)
  240. output transformer spice model
  241. cathode connection in directly heated triodes
  242. 50watt Plexi Again
  243. Anyone use ICs as input phase splitters for tube equipment
  244. Tube Sockets
  245. RIAA and Linestage for life time
  246. 211 Preamp
  247. Building a Marshall Plexi
  248. PL504 circuits.
  249. Tube Recommendation
  250. 6.3v 30A!?

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