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  1. switching regulators
  2. Push Pull Power supply. to Tube or not to?
  3. Kepco 615B Bench Supply pix
  4. Standart gains and voltage levels for standart audio eq
  5. How do I measure OPT impedance?
  6. Using TFA 204 transformers for SE EL84?
  7. Help on 311-CH triode tube
  8. Shots of my GG pre amp!!
  9. 6C45Pi Microphone Preamp
  10. cf topology lessons... pls help
  11. Father's Cousin Louis's vintage 1920+ collection pictures!
  12. Tube Newbie needs help
  13. Need help
  14. Zytron Tubes
  15. Hapi2 Preamp
  16. Svetlana Cryo Tubes For Wave 8's
  17. Audio Note Preamp Circuit a good guess...
  18. Which one is the better design?
  19. Lab Power Supply for Glass Audio
  20. A joke?
  21. Need Advice on new Amp
  22. Using the 7591 or 7868
  23. Schematic of Audio Research VT 100
  24. Hermetically sealed Oil Filled resistors!
  25. Pre Amp schematic Audio Note M1
  26. opt impedance
  27. Schematic for Bogen DB130 ?
  28. SRPP Help Needed
  29. Schematic for Bogen DB130 ?
  30. Hot tube
  31. 6L6 Design Phase
  32. High Power Single Ended Amplifier Club
  33. Suggestions please..
  34. These are the best looking tube amps I have ever seen
  35. Sylvania News
  36. Will this work? "Mixed" 300B PPP IT
  37. Whats a Good 6L6 circuit?
  38. Guitar Tube Preamp
  39. Circlotron amps
  40. Mods on leak stereo 20
  41. When do the tubes have a fever?
  42. psu problem
  43. earthing
  44. 6V6 SET amp with 6SN7 driver
  45. 6n1p pre with active load
  46. buy tubes in the EU
  47. Neutral AC wave on O'scope
  48. Running power to tubes so as not to effect the audio signal
  49. el34 se schematic opinion
  50. Ef86
  51. A Rimbaldi amp?
  52. SE or PP?
  53. PP 807's
  54. CCS loading first stage of DC coupled driver
  55. Search for a pre (RIAA+LINE+TUNER)with 12au7-12ax7.
  56. Film cap's
  57. Goertz: amp killer? or where to fix my Audio Research VSi55?
  58. help finding a good amp project?
  59. Yet another valve pre, comments?!
  60. Source for round and/or square transformer covers ??
  61. Ac30
  62. Some questions!
  63. filament source connection to DHT
  64. Use tubes for 2000V. power supply,
  65. mu / srpp / or CF?
  66. dB into voltage gain????
  67. Building a Tube Mic Pre
  68. Negative Voltage using tube rectifier?
  69. Reichert info
  70. really basic question
  71. Has anybody built 6BG6 or similar OTL amp?
  72. Old OP Transformer
  73. Need Advice, 820vct tranny?
  74. 811a Tube Cap Size
  75. need help with (now) not-working amp
  76. How about this 12au7 pre?
  77. SV811-3 SE : Lots of questions...
  78. Criticise please!
  79. 6n3p = ECC85 ???
  80. Any website reference for diy Audio Research REFERENCE amp and Manley Studio amp
  81. grid bias
  82. 12AT7 poweramp specs?
  83. valve pre amp
  84. what is the simplest possible triode amp?
  85. poweramp topology
  86. limits in transient time
  87. OPT Design
  88. Would this work
  89. manley pre schematic
  90. Heathkit FM3A
  91. Aleph-type CCS as plate load?
  92. Talbot Wright's Williamson mod (Heathkit W3-AM)
  93. Conrad-Johnson PV6 Preamp
  94. Mc275 opt manual rewinding
  95. Newbie asking help
  96. converting EF86 to take 12AX7
  97. B&K 650 tube tester not working, need help
  98. 5814/12AU7 Preamp?
  99. Grounded Grid pre amp-- help please
  100. Tube output indicator - EM84 or 6AF6G
  101. suggest circuit with gain of 60
  102. ready to mod the hell out of my asl wave 8's
  103. My First DIY - need big help!
  104. rectifier tube question
  105. Newbie with Tannoy grfs, helpme to choice a good amp to them.
  106. Mullard CV 4109 tube
  107. Pre PS Improvements?
  108. 6n7gt+300b
  109. Calculating DC coupled Single Ended Valve Amplifiers - Part #1
  110. 12ax7 preamp,need help.
  111. tube datasheets and amp sch
  112. How to check output transformers ?
  113. Filament of a 6AS7G
  114. triode=>pentode
  115. noob PSUD question...
  116. Detailed and Dry.
  117. Audion sterling phono stage - a good base for future upgrades?
  118. First Try on Tube Preamp
  119. EL34 in class AB2 triode mode push-pull?
  120. Heater Voltage Range, Hi or Low
  121. Donor H/K A224 Amp
  122. market for used tubes?
  123. Voltage Doubler Problem
  124. 6922 as a CCS, a question ?
  125. ALPS Pot
  126. Tube parameter ?
  127. tube life
  128. 7591A Tubes for sale?
  129. Restoring tired tubes
  130. My Bottlehead Tube Rig is done...for now
  131. Hammond Transformers
  132. Kenwood KW-70 Receiver
  133. Tube output buffer for DAC....needs advice!
  134. The Crackerbox Amp
  135. Antique Sound Lab MG-SPM25 Output Transformers
  136. el84 quad schematic..something is wrong...?
  137. really dumb question about SE 6bq5 operating point (triode)
  138. 6n7gt
  139. EE-Zee & Chee-Zee bias and offset adjustment idea
  140. Preamp Selection
  141. High frecuency oscillation when moving volume pot
  142. Choke load - how to plot loadline?
  143. Audio Research LS2
  144. Any Tube DIYers in Bay Area
  145. 6DJ8 preamp voltage?
  146. Diodes in Grid-Cathode Circuit
  147. To regulate or not?
  148. Odd tube behavior
  149. output txfr on cathode?
  150. tube preamp w/ XLR?
  151. ECC88 and PCC88 filament voltages
  152. Best tube choice for 1st SET project?
  153. Croft Vitale
  154. at last, amp finnished
  155. Silver micas as coupling caps?
  156. Valve-Heart Recording Studio
  157. Prototyping ( Breadboard ) Chassis Ideas and Suggestions
  158. old tubes
  159. where to place extra filter cap
  160. Troubleshooting a 6n1p linestage.
  161. 300BSE series
  162. Which triode is the best for preamp?
  163. AV8 and AV15 Vaic tubes
  164. Refridgerator trying to kill my Valve Amp
  165. When is capacitance making AC ripple a non-issue in B+ PS's?
  166. Quicksilver Bias Problem
  167. Looking for good book about phase split
  168. speaker protection fuse in Transcendent T8
  169. Shuguang Tube Factory(pics)
  170. "Pentodes for Dummies" needed.
  171. schematic for audio research classic 120 amps?
  172. Bouncing Ground
  173. Testing response....
  174. Impedance selection
  175. Heater To Cathode Potential
  176. uneven wound 50w OT 2 ideas...?
  177. 6B4G Amplifier Questions
  178. grounding heater/filament center
  179. Do I lose power when parafeeding?
  180. no ground problem
  181. Tube amp project
  182. bi-amping with gainclone + tubeamp
  183. Plitron/Vanderveen/KT88 Tube rectifier recommendation for 230mA?
  184. proposed 833 design
  185. Thyratron Circuit
  186. different phase invertors
  187. Tetrode or Pentode? / Tube info
  188. RECTIFIERLESS, is that possible?
  189. About high voltage regulated power supplies
  190. Stupid question about capacitors
  191. Time advanced error feedback correction
  192. My first tube amp
  193. copland 504
  194. 6D22S Damper Tubes
  195. resuscitating 60+ year old radio
  196. 6C45 in a phono amp? looks like this might be hot.
  197. quality of power supply
  198. Gassy Tube
  199. transformer coupling, magnetic amplifiers, grid leak current
  200. How low 6922/ECC88 can go?
  201. Question about PP EL34 power supply behaviour
  202. Tube amps and electric safety
  203. Transformer for a tube amp question
  204. Need some info on E88CC/6922
  205. strange "thing"
  206. Extra gain stage Marshall plexi 50watt
  207. Help with Hickok 539A tube tester repair..
  208. Micing tube amps
  209. Tube preamp huge DC thump!
  210. New speaker for transcendent T8
  211. choke winding
  212. MC phono preamp
  213. KYW's linestage (split from RIAA for life time)
  214. output transformer spice model
  215. cathode connection in directly heated triodes
  216. 50watt Plexi Again
  217. Anyone use ICs as input phase splitters for tube equipment
  218. Tube Sockets
  219. RIAA and Linestage for life time
  220. 211 Preamp
  221. Building a Marshall Plexi
  222. PL504 circuits.
  223. Tube Recommendation
  224. 6.3v 30A!?
  225. Simplest 6080 or 6AS7 OTL Project?
  226. Is 6N1P = 6N7 = ECC31
  227. EL34 in Pentode Class A?
  228. Wiring a 12au7
  229. BLue hue
  230. Choosing a suitable 50W cathode resistor
  231. 5687
  232. heathkit Schematic
  233. Precision S100 schematics?
  234. my RIAA stage. Any comment
  235. buffer circuits
  236. switchable 2.5k/5k primary ot
  237. Old grundig 3095 radio
  238. DIY Single Ended Triode Designs
  239. dog whistle
  240. Volume pot question
  241. Oil PP Cap
  242. commercial tube preamps
  243. Transformer Cover
  244. Harman-Kardon A-300 Amplifier
  245. Phono preamp- how to modify to get deeper LF?
  246. Thyratron heater supply?
  247. amp conversions
  248. Looking for Scott 200 photofacts or service manual
  249. 6ag7 metal pentodes
  250. EL84 Push-Pull Vieta A-225 opinion

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