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  1. Some questions about C4S CCS adjustment.
  2. Lowther LL18S stereo power amplifier - circuit diagram?
  3. Problem with mouting choke underneath chassis?
  4. How accurate is RMAA distortion measurement?
  5. 801
  6. CROFT Eminent Audio
  7. Any good flea-watt SET designs?
  8. PTP wiring
  9. switching regulators
  10. Push Pull Power supply. to Tube or not to?
  11. Kepco 615B Bench Supply pix
  12. Standart gains and voltage levels for standart audio eq
  13. How do I measure OPT impedance?
  14. Using TFA 204 transformers for SE EL84?
  15. Help on 311-CH triode tube
  16. Shots of my GG pre amp!!
  17. 6C45Pi Microphone Preamp
  18. cf topology lessons... pls help
  19. Father's Cousin Louis's vintage 1920+ collection pictures!
  20. Tube Newbie needs help
  21. Need help
  22. Zytron Tubes
  23. Hapi2 Preamp
  24. Svetlana Cryo Tubes For Wave 8's
  25. Audio Note Preamp Circuit a good guess...
  26. Which one is the better design?
  27. Lab Power Supply for Glass Audio
  28. A joke?
  29. Need Advice on new Amp
  30. Using the 7591 or 7868
  31. Schematic of Audio Research VT 100
  32. Hermetically sealed Oil Filled resistors!
  33. Pre Amp schematic Audio Note M1
  34. opt impedance
  35. Schematic for Bogen DB130 ?
  36. SRPP Help Needed
  37. Schematic for Bogen DB130 ?
  38. Hot tube
  39. 6L6 Design Phase
  40. High Power Single Ended Amplifier Club
  41. Suggestions please..
  42. These are the best looking tube amps I have ever seen
  43. Sylvania News
  44. Will this work? "Mixed" 300B PPP IT
  45. Whats a Good 6L6 circuit?
  46. Guitar Tube Preamp
  47. Circlotron amps
  48. Mods on leak stereo 20
  49. When do the tubes have a fever?
  50. psu problem
  51. earthing
  52. 6V6 SET amp with 6SN7 driver
  53. 6n1p pre with active load
  54. buy tubes in the EU
  55. Neutral AC wave on O'scope
  56. Running power to tubes so as not to effect the audio signal
  57. el34 se schematic opinion
  58. EF86
  59. A Rimbaldi amp?
  60. SE or PP?
  61. PP 807's
  62. CCS loading first stage of DC coupled driver
  63. Search for a pre (RIAA+LINE+TUNER)with 12au7-12ax7.
  64. Film cap's
  65. Goertz: amp killer? or where to fix my Audio Research VSi55?
  66. help finding a good amp project?
  67. Yet another valve pre, comments?!
  68. Source for round and/or square transformer covers ??
  69. Ac30
  70. Some questions!
  71. filament source connection to DHT
  72. Use tubes for 2000V. power supply,
  73. mu / srpp / or CF?
  74. dB into voltage gain????
  75. Building a Tube Mic Pre
  76. Negative Voltage using tube rectifier?
  77. Reichert info
  78. really basic question
  79. Has anybody built 6BG6 or similar OTL amp?
  80. Old OP Transformer
  81. Need Advice, 820vct tranny?
  82. 811a Tube Cap Size
  83. need help with (now) not-working amp
  84. How about this 12au7 pre?
  85. SV811-3 SE : Lots of questions...
  86. Criticise please!
  87. 6n3p = ECC85 ???
  88. Any website reference for diy Audio Research REFERENCE amp and Manley Studio amp
  89. grid bias
  90. 12AT7 poweramp specs?
  91. valve pre amp
  92. what is the simplest possible triode amp?
  93. poweramp topology
  94. limits in transient time
  95. OPT Design
  96. Would this work
  97. manley pre schematic
  98. Heathkit FM3A
  99. Aleph-type CCS as plate load?
  100. Talbot Wright's Williamson mod (Heathkit W3-AM)
  101. Conrad-Johnson PV6 Preamp
  102. Mc275 opt manual rewinding
  103. Newbie asking help
  104. converting EF86 to take 12AX7
  105. B&K 650 tube tester not working, need help
  106. 5814/12AU7 Preamp?
  107. Grounded Grid pre amp-- help please
  108. Tube output indicator - EM84 or 6AF6G
  109. suggest circuit with gain of 60
  110. ready to mod the hell out of my asl wave 8's
  111. My First DIY - need big help!
  112. rectifier tube question
  113. Newbie with Tannoy grfs, helpme to choice a good amp to them.
  114. Mullard CV 4109 tube
  115. Pre PS Improvements?
  116. 6n7gt+300b
  117. Calculating DC coupled Single Ended Valve Amplifiers - Part #1
  118. 12ax7 preamp,need help.
  119. tube datasheets and amp sch
  120. How to check output transformers ?
  121. Filament of a 6AS7G
  122. triode=>pentode
  123. noob PSUD question...
  124. Detailed and Dry.
  125. Audion sterling phono stage - a good base for future upgrades?
  126. First Try on Tube Preamp
  127. EL34 in class AB2 triode mode push-pull?
  128. Heater Voltage Range, Hi or Low
  129. Donor H/K A224 Amp
  130. market for used tubes?
  131. Voltage Doubler Problem
  132. 6922 as a CCS, a question ?
  133. ALPS Pot
  134. Tube parameter ?
  135. tube life
  136. 7591A Tubes for sale?
  137. Restoring tired tubes
  138. My Bottlehead Tube Rig is done...for now
  139. Hammond Transformers
  140. Kenwood KW-70 Receiver
  141. Tube output buffer for DAC....needs advice!
  142. The Crackerbox Amp
  143. Antique Sound Lab MG-SPM25 Output Transformers
  144. el84 quad schematic..something is wrong...?
  145. really dumb question about SE 6bq5 operating point (triode)
  146. 6n7gt
  147. EE-Zee & Chee-Zee bias and offset adjustment idea
  148. Preamp Selection
  149. High frecuency oscillation when moving volume pot
  150. Choke load - how to plot loadline?
  151. Audio Research LS2
  152. Any Tube DIYers in Bay Area
  153. 6DJ8 preamp voltage?
  154. Diodes in Grid-Cathode Circuit
  155. To regulate or not?
  156. Odd tube behavior
  157. output txfr on cathode?
  158. tube preamp w/ XLR?
  159. ECC88 and PCC88 filament voltages
  160. Best tube choice for 1st SET project?
  161. Croft Vitale
  162. at last, amp finnished
  163. Silver micas as coupling caps?
  164. Valve-Heart Recording Studio
  165. Prototyping ( Breadboard ) Chassis Ideas and Suggestions
  166. old tubes
  167. where to place extra filter cap
  168. Troubleshooting a 6n1p linestage.
  169. 300BSE series
  170. Which triode is the best for preamp?
  171. AV8 and AV15 Vaic tubes
  172. Refridgerator trying to kill my Valve Amp
  173. When is capacitance making AC ripple a non-issue in B+ PS's?
  174. Quicksilver Bias Problem
  175. Looking for good book about phase split
  176. speaker protection fuse in Transcendent T8
  177. Shuguang Tube Factory(pics)
  178. "Pentodes for Dummies" needed.
  179. schematic for audio research classic 120 amps?
  180. Bouncing Ground
  181. Testing response....
  182. Impedance selection
  183. Heater To Cathode Potential
  184. uneven wound 50w OT 2 ideas...?
  185. 6B4G Amplifier Questions
  186. grounding heater/filament center
  187. Do I lose power when parafeeding?
  188. no ground problem
  189. Tube amp project
  190. bi-amping with gainclone + tubeamp
  191. Plitron/Vanderveen/KT88 Tube rectifier recommendation for 230mA?
  192. proposed 833 design
  193. Thyratron Circuit
  194. different phase invertors
  195. Tetrode or Pentode? / Tube info
  196. RECTIFIERLESS, is that possible?
  197. About high voltage regulated power supplies
  198. Stupid question about capacitors
  199. Time advanced error feedback correction
  200. My first tube amp
  201. copland 504
  202. 6D22S Damper Tubes
  203. resuscitating 60+ year old radio
  204. 6C45 in a phono amp? looks like this might be hot.
  205. quality of power supply
  206. Gassy Tube
  207. transformer coupling, magnetic amplifiers, grid leak current
  208. How low 6922/ECC88 can go?
  209. Question about PP EL34 power supply behaviour
  210. Tube amps and electric safety
  211. Transformer for a tube amp question
  212. Need some info on E88CC/6922
  213. strange "thing"
  214. Extra gain stage Marshall plexi 50watt
  215. Help with Hickok 539A tube tester repair..
  216. Micing tube amps
  217. Tube preamp huge DC thump!
  218. New speaker for transcendent T8
  219. choke winding
  220. MC phono preamp
  221. KYW's linestage (split from RIAA for life time)
  222. output transformer spice model
  223. cathode connection in directly heated triodes
  224. 50watt Plexi Again
  225. Anyone use ICs as input phase splitters for tube equipment
  226. Tube Sockets
  227. RIAA and Linestage for life time
  228. 211 Preamp
  229. Building a Marshall Plexi
  230. PL504 circuits.
  231. Tube Recommendation
  232. 6.3v 30A!?
  233. Simplest 6080 or 6AS7 OTL Project?
  234. Is 6N1P = 6N7 = ECC31
  235. EL34 in Pentode Class A?
  236. Wiring a 12au7
  237. BLue hue
  238. Choosing a suitable 50W cathode resistor
  239. 5687
  240. heathkit Schematic
  241. Precision S100 schematics?
  242. my RIAA stage. Any comment
  243. buffer circuits
  244. switchable 2.5k/5k primary ot
  245. Old grundig 3095 radio
  246. DIY Single Ended Triode Designs
  247. dog whistle
  248. Volume pot question
  249. Oil PP Cap
  250. commercial tube preamps

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