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  1. Vacuum Tube Valley 6SN7 preamp
  2. SET Power Supply Regulation
  3. TubeCAD
  4. 60 Hz noise in modified Audible Illusions M2B
  5. Anodized Aluminum and Glue/Epoxy
  6. shared parts between channels
  7. May I use 5K transformer for Dynaco III amp?
  8. First amp build questions
  9. Help needed changing from srpp5814a to srpp12bh7a
  10. ok, i'll try and make it simple.
  11. Sure, copy an amp. . . It'd work but I'm looking for something different.
  12. Half a bee Philosophically. . . Er sorry Its actually about ECC83 amps
  13. Bogan schematic for HO 50 power Amp
  14. Can VT-185 be applied in audio circuit?
  15. Best PP transformer for 2A3 amp?
  16. help in finding tubetester meter value
  17. B+ Voltage
  18. CCS Conceptual Qs, Using Gary Pimm CCS as Example
  19. Is there a no/gain preamplifier schematic using high-distortion EC90?
  20. Klystron??
  21. single ended 2a3 project
  22. Visit Shuguang tube factory(many pics)
  23. AKAI M8 Tube R-R input problem
  24. How do Sovtek 6L6WGCs stand up?
  25. Hammond SE Transformer question
  26. Tube Safety
  27. old console
  28. AB1 or 2?
  29. help with restoring amp
  30. Tube preamplifier with PCC88
  31. Tube amplifier 300b proyect
  32. linestage needed
  33. 5687 Tube - best choice
  34. Fisher 500c - Trouble shooting tuner section
  35. Morgan Jones book to swap
  36. gu-48 PP
  37. Taylor 45b Gm Problem
  38. 5687, ECC99, 7119, or E182CC??
  39. Bell Sound Systems Old Gem
  40. Mu-follower current capability?
  41. Filaments voltage question
  42. Is it Good to regulate supplies?
  43. Damper Diodes
  44. Fisher X-100 transformers
  45. Some questions about C4S CCS adjustment.
  46. Lowther LL18S stereo power amplifier - circuit diagram?
  47. Problem with mouting choke underneath chassis?
  48. How accurate is RMAA distortion measurement?
  49. 801
  50. CROFT Eminent Audio
  51. Any good flea-watt SET designs?
  52. PTP wiring
  53. switching regulators
  54. Push Pull Power supply. to Tube or not to?
  55. Kepco 615B Bench Supply pix
  56. Standart gains and voltage levels for standart audio eq
  57. How do I measure OPT impedance?
  58. Using TFA 204 transformers for SE EL84?
  59. Help on 311-CH triode tube
  60. Shots of my GG pre amp!!
  61. 6C45Pi Microphone Preamp
  62. cf topology lessons... pls help
  63. Father's Cousin Louis's vintage 1920+ collection pictures!
  64. Tube Newbie needs help
  65. Need help
  66. Zytron Tubes
  67. Hapi2 Preamp
  68. Svetlana Cryo Tubes For Wave 8's
  69. Audio Note Preamp Circuit a good guess...
  70. Which one is the better design?
  71. Lab Power Supply for Glass Audio
  72. A joke?
  73. Need Advice on new Amp
  74. Using the 7591 or 7868
  75. Schematic of Audio Research VT 100
  76. Hermetically sealed Oil Filled resistors!
  77. Pre Amp schematic Audio Note M1
  78. opt impedance
  79. Schematic for Bogen DB130 ?
  80. SRPP Help Needed
  81. Schematic for Bogen DB130 ?
  82. Hot tube
  83. 6L6 Design Phase
  84. High Power Single Ended Amplifier Club
  85. Suggestions please..
  86. These are the best looking tube amps I have ever seen
  87. Sylvania News
  88. Will this work? "Mixed" 300B PPP IT
  89. Whats a Good 6L6 circuit?
  90. Circlotron amps
  91. Mods on leak stereo 20
  92. When do the tubes have a fever?
  93. psu problem
  94. earthing
  95. 6V6 SET amp with 6SN7 driver
  96. 6n1p pre with active load
  97. buy tubes in the EU
  98. Neutral AC wave on O'scope
  99. Running power to tubes so as not to effect the audio signal
  100. el34 se schematic opinion
  101. EF86
  102. A Rimbaldi amp?
  103. SE or PP?
  104. PP 807's
  105. CCS loading first stage of DC coupled driver
  106. Search for a pre (RIAA+LINE+TUNER)with 12au7-12ax7.
  107. Film cap's
  108. Goertz: amp killer? or where to fix my Audio Research VSi55?
  109. help finding a good amp project?
  110. Yet another valve pre, comments?!
  111. Source for round and/or square transformer covers ??
  112. Some questions!
  113. filament source connection to DHT
  114. Use tubes for 2000V. power supply,
  115. mu / srpp / or CF?
  116. dB into voltage gain????
  117. Building a Tube Mic Pre
  118. Negative Voltage using tube rectifier?
  119. Reichert info
  120. really basic question
  121. Has anybody built 6BG6 or similar OTL amp?
  122. Old OP Transformer
  123. Need Advice, 820vct tranny?
  124. 811a Tube Cap Size
  125. need help with (now) not-working amp
  126. How about this 12au7 pre?
  127. SV811-3 SE : Lots of questions...
  128. Criticise please!
  129. 6n3p = ECC85 ???
  130. Any website reference for diy Audio Research REFERENCE amp and Manley Studio amp
  131. grid bias
  132. 12AT7 poweramp specs?
  133. valve pre amp
  134. what is the simplest possible triode amp?
  135. poweramp topology
  136. limits in transient time
  137. OPT Design
  138. Would this work
  139. manley pre schematic
  140. Heathkit FM3A
  141. Aleph-type CCS as plate load?
  142. Talbot Wright's Williamson mod (Heathkit W3-AM)
  143. Conrad-Johnson PV6 Preamp
  144. MC275 OPT manual rewinding
  145. Newbie asking help
  146. converting EF86 to take 12AX7
  147. 5814/12AU7 Preamp?
  148. Grounded Grid pre amp-- help please
  149. Tube output indicator - EM84 or 6AF6G
  150. suggest circuit with gain of 60
  151. ready to mod the hell out of my asl wave 8's
  152. My First DIY - need big help!
  153. rectifier tube question
  154. Newbie with Tannoy grfs, helpme to choice a good amp to them.
  155. Mullard CV 4109 tube
  156. Pre PS Improvements?
  157. 6n7gt+300b
  158. Calculating DC coupled Single Ended Valve Amplifiers - Part #1
  159. 12ax7 preamp,need help.
  160. tube datasheets and amp sch
  161. How to check output transformers ?
  162. Filament of a 6AS7G
  163. triode=>pentode
  164. noob PSUD question...
  165. Detailed and Dry.
  166. Audion sterling phono stage - a good base for future upgrades?
  167. First Try on Tube Preamp
  168. EL34 in class AB2 triode mode push-pull?
  169. Heater Voltage Range, Hi or Low
  170. Donor H/K A224 Amp
  171. market for used tubes?
  172. Voltage Doubler Problem
  173. 6922 as a CCS, a question ?
  174. ALPS Pot
  175. Tube parameter ?
  176. tube life
  177. 7591A Tubes for sale?
  178. Restoring tired tubes
  179. My Bottlehead Tube Rig is done...for now
  180. Hammond Transformers
  181. Kenwood KW-70 Receiver
  182. Tube output buffer for DAC....needs advice!
  183. The Crackerbox Amp
  184. Antique Sound Lab MG-SPM25 Output Transformers
  185. el84 quad schematic..something is wrong...?
  186. really dumb question about SE 6bq5 operating point (triode)
  187. 6n7gt
  188. EE-Zee & Chee-Zee bias and offset adjustment idea
  189. Preamp Selection
  190. High frecuency oscillation when moving volume pot
  191. Choke load - how to plot loadline?
  192. Audio Research LS2
  193. Any Tube DIYers in Bay Area
  194. 6DJ8 preamp voltage?
  195. Diodes in Grid-Cathode Circuit
  196. To regulate or not?
  197. Odd tube behavior
  198. output txfr on cathode?
  199. tube preamp w/ XLR?
  200. ECC88 and PCC88 filament voltages
  201. Best tube choice for 1st SET project?
  202. Croft Vitale
  203. at last, amp finnished
  204. Valve-Heart Recording Studio
  205. Prototyping ( Breadboard ) Chassis Ideas and Suggestions
  206. old tubes
  207. where to place extra filter cap
  208. Troubleshooting a 6n1p linestage.
  209. 300BSE series
  210. Which triode is the best for preamp?
  211. AV8 and AV15 Vaic tubes
  212. Refridgerator trying to kill my Valve Amp
  213. When is capacitance making AC ripple a non-issue in B+ PS's?
  214. Quicksilver Bias Problem
  215. Looking for good book about phase split
  216. speaker protection fuse in Transcendent T8
  217. Shuguang Tube Factory(pics)
  218. "Pentodes for Dummies" needed.
  219. schematic for audio research classic 120 amps?
  220. Bouncing Ground
  221. Testing response....
  222. Impedance selection
  223. Heater To Cathode Potential
  224. uneven wound 50w OT 2 ideas...?
  225. 6B4G Amplifier Questions
  226. grounding heater/filament center
  227. Do I lose power when parafeeding?
  228. no ground problem
  229. Tube amp project
  230. bi-amping with gainclone + tubeamp
  231. Plitron/Vanderveen/KT88 Tube rectifier recommendation for 230mA?
  232. proposed 833 design
  233. Thyratron Circuit
  234. different phase invertors
  235. Tetrode or Pentode? / Tube info
  236. RECTIFIERLESS, is that possible?
  237. About high voltage regulated power supplies
  238. Stupid question about capacitors
  239. Time advanced error feedback correction
  240. My first tube amp
  241. copland 504
  242. 6D22S Damper Tubes
  243. resuscitating 60+ year old radio
  244. 6C45 in a phono amp? looks like this might be hot.
  245. quality of power supply
  246. Gassy Tube
  247. transformer coupling, magnetic amplifiers, grid leak current
  248. How low 6922/ECC88 can go?
  249. Question about PP EL34 power supply behaviour
  250. Tube amps and electric safety

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