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  1. Quick valve construction question
  2. Poindexter's 6v6 PP amp
  3. need some help with Ohm's law-fast!
  4. hybrid rectifier question
  5. I really, really wish I hadn't done that...
  6. Quicksilver 8417 conversion
  7. Supratek
  8. remote OPT, stupid idea ?
  9. Autoformer output stage
  10. Remote Power Supply: A Stupid Idea?
  11. Rjm simple tube phono pre
  12. Voltage controlled filter with tubes ??
  13. Does this look right to you?
  14. PWM amplifier hooked onto a tube preamp
  15. Zenith Console Opt Question, Odd Secondary
  16. Marchand LN108 Tube Phono Preamp
  17. Anyone care to express an opinion on this output Transformer
  18. 6L6 Triode strapped amp suggestions
  19. 6F1 and 6P2 Equivalents
  20. in memoriam Fred N. AKA 807
  21. Perplexed by 5AR4 Tube Socket? Picture Included
  22. Push pull 300B and more than a few questions...
  23. First tube project.
  24. DHT learning
  25. how do i add adjustable bias on amp?
  26. Tube tester: Accurate Instruments Model 157
  27. "El Cheapo Valve Phono" using 6ER5=>12AT7WC?
  28. Design Questions
  29. SRPP + Gainclone
  30. dht p-p filament question
  31. Report - 2005 London HiFi Show
  32. Want to build hi - power amp
  33. Can I mod this circuit to use 6922 tubes?
  34. tube preamp kit question (again?)
  35. 3f4 spice models needed
  36. Back to Back transformers to get +B of 200V ??
  37. New amp project-some ideas of my own and looking for input from others...
  38. Emphasising the transients, but making the mediocre listenable
  39. Looking For a PP 6Y6GA Design
  40. Industrial vs Commercial amps and OPT's
  41. ECC99 operating points?
  42. Preamp suggestions for a tube newbie
  43. very odd thing happening in my amp... help
  44. 47 Penthode in triode mode.
  45. Capacitor value
  46. PSE bias how?
  47. GM70 Power supply
  48. interstage convert to phase splitter
  49. EL84 SE advice'n'schematics needed
  50. world's heaviest 2A3 amp?
  51. How To Tell What Tubes To Keep
  52. PX4 Trauma
  53. An amplifier project I'm looking for...
  54. Your 100volt plus moment
  55. Dynaco rectifier replacement?
  56. SET on a budget
  57. PSU Design Learning Links
  58. Expensive Commercial Amps
  59. Tube modified CD player with TDA1543
  60. Fluorescent lamp choke - use in tube amp?
  61. Tube Overdrive
  62. Mains Transformer for EL34PP
  63. Please review schematic
  64. Wire size for projects?
  65. super simple tube amp needed...
  66. Matlab-based triode modelling software
  67. 12AT7 Pre-amp schematic, where to find?
  68. Test settings for Hickok 539A for 183/483 tube?
  69. choke input ripple level?
  70. 120 Hz Buzz Unplugged
  71. 300B like 845
  72. DC filament ground and high voltage ground
  73. DIY Club remote volume help?
  74. Aesthetix Rhea and I/O diagrams?
  75. Cathode Bypass Cap questions
  76. rectification and xfmr stress
  77. Audio Research
  78. Anybody got Melos MA-111 Schematic?
  79. Problem locating power supply
  80. Timer Relay
  81. Help With Jukebox Amp
  82. Help the Idiot: Simple, Great-Sounding Integrated Amp Designs
  83. 6W6 as a driver
  84. Choosing the best EL34 pp opt
  85. Your opinion, please
  86. Tube surround sound
  87. Could you guys check this cascode article for me
  88. what would happen if...
  89. A Heretical Unity Gain Line Stage part III
  90. Which ECC83 tube and caps question
  91. Paralle Push Pull Simulclass
  92. organ amp question
  93. Stereo build- Mikael Abdellah's KT88 SE amp
  94. Audio Research AC21 cross over
  95. First DIY amp pics-as promised!
  96. emission-lab info
  97. Simple EL84 PP design needed
  98. 6C33 Circlotron
  99. Valves glow fierce
  100. Kirung's GM70 SE-Amps from Korea
  101. Digital Pots
  102. Troubleshooting First Tube Project
  103. Millett Low mu Preamp help
  104. thoughts about a 'universal' preamp
  105. Morgan Jones's Bevois Valley amp...
  106. Aikido line stage results? share yours
  107. HELP with breadboard layout!!!
  108. balanced line stage schematic needed
  109. Its Alive!! First Diy Amp Works!!
  110. Duncan Munro Psud primer please?
  111. Preamp volume control??
  112. Welborne 300b DRD plate current
  113. Active compensation...
  114. Calculating expected output power.
  115. Hybrid X line amp
  116. any way to fix a end cap on a 807 power tube
  117. power tube question
  118. MJ head-amp- how does it sound?
  119. Quick Aikido question
  120. What kind of amp?
  121. Problem with cathode resistor
  122. 2A3 DRD schematic wanted
  123. reduce before amplifying?
  124. 6AS7-G RCA application considerations
  125. Matisse Fantasy waveform output test
  126. El84/6bq5/ecc83 + Ef86 = Dc Pp
  127. Searching for simple circuit
  128. McIntosh MC60 Screens
  129. Improve this Pilot 240 (EL84/6BQ5)
  130. Eimac 35TG
  131. power supply issues
  132. Which Amperex ECC88 is the best?
  133. Grid battery bias on phono....
  134. EL34 identification
  135. UL vs SE
  136. 6sn7 operating points
  137. HELP! B+ voltage problem/burning power resistor
  138. are these tubes any good ?????
  139. E280F Triode mode operating point
  140. Free Lunch/Monkey/DRD inspired 2A3
  141. 2nd Aikido PCB and PSU groupbuy
  142. Newbie question...
  143. Help in getting more gain out of 300B SE
  144. ECC808 what to do
  145. Microphonics When Hot, Raytheon CK5842
  146. MOSCODE hybrid DIY
  147. transformer question
  148. help, my amp humz
  149. Le tube preamp
  150. Ideal operating point of 6sj7
  151. Anyone tried the Hammond 1642SE in a BIG SE amp?
  152. MOSFET current source as triode load
  153. C-core transformers
  154. choke and choke
  155. suggestions for 300B tubes
  156. Differential input stage
  157. rca conversion
  158. heating
  159. Russian 6N8S/1578
  160. DIY tube amp squeals when turned up
  161. ECL80-Amp from Andreas Kirschner
  162. HSS preamp, anyone care to comment
  163. help me design an input stage for 6b4G PP
  164. Instrument/Microphone Tube Pre-amp
  165. first-time tube DIY project...phono preamp
  166. A question regarding schematics
  167. My first creation
  168. Your opinion on this VCCS heater supply please.
  169. Looking for ORIGINAL GE 6L6GC
  170. Need help - O/T trannies for future project
  171. ECL82 (6BM8) PP Stereo
  172. first DIY amp start up-yowza HELP!
  173. Ronette Info
  174. GE 5687 (5 stars)
  175. Help: Toroid choke for a preamp
  176. does meter degrade sound ?
  177. Eye Tube (1629) controller help
  178. Scott 99B & 99C Public Auction Find
  179. tube id book
  180. radio , tv station and radar stations still use the best single end class a amplifier
  181. Stupid question?
  182. looking for ideas on a small tube amp stand?
  183. Cascode gain stage info?????
  184. hi gain preamp
  185. Tube flashing
  186. Bogen tube amp with variable Damping Factor
  187. Question re Allen Wright PP-1cs
  188. What is a good Tube tester to get?
  189. High Gain Preamp
  190. SACThailand
  191. You know you're a tube junky when...
  192. 6AU6 to do EF86 duty?
  193. 6Н28Б-В datasheet?
  194. Is single ended Class A better than push-pull?
  195. Is 845 better than 211 tube amplifier?
  196. Cool Fireworks (tubes are tough!)
  197. Big Big hum ???
  198. 5687 filament heater question
  199. Anyone know agood MOSFET drive for RCA 811A Tube?
  200. Who is into musical instrument tube amplification?
  201. buffer stage ECC88 or ECC83?
  202. EL34 Integrated
  203. Solid state HT regulator??
  204. Tubes driving dipole mids
  205. How do I turn an high current signal into a line level signal??
  206. Peer review, UL question
  207. Grundig TK60 - Where is the Line Out ?
  208. 12AX7, EL34 or 6L6 design wanted
  209. RCA to Speakers?
  210. Morgan Jones - Valve books
  211. Any one tried to use subminiature for input tubes?
  212. Tube data for current manufacturers?
  213. Pentode to Triode Switch
  214. fried Heatkit IP-17 power supply
  215. Suggestions for Tube Amplifier
  216. SMPS for 300B heater ?
  217. What does this mean?
  218. heater/cathode query
  219. Bottlehead S.E.X Amp
  220. Old Meets New
  221. 6336-SE modification
  222. 6as7 pre-amp questions.
  223. Help in calculating NFB loop.
  224. ECL86 - quick and dirty
  225. preamp tubes change
  226. Parallel PP ECL86
  227. Anyone build a Minimal Reactance PSU?
  228. Transformer hook-up question to 115V AC line
  229. Langevin Schematic Archive
  230. PPP EL84 Amp
  231. Interesting comparison between NOS RCA 12ax7, Chinese 12ax7a
  232. Aikido: Width control
  233. Shielded Input Wire
  234. choke
  235. Multiple Inputs in One Shielded Cable?
  236. Presence control on a SE ?
  237. Question : pentode ccs schematic ?
  238. right capacitor value?
  239. Anybody knows this tube--WE 430C
  240. Transformer substitution help
  241. CFB Issues
  242. Please Suggest: Old Tube Usages
  243. Very powerful push/pull circuit
  244. Project choice for KT88
  245. Tamura F-475 in Parafeed?
  246. Kofi Annan in: "Push and Pull with Me"
  247. Schmitt dephaser
  248. Anyone using Chelmer Valves?
  249. SET w/ 300B Ultrapath + Parafeed Typologies
  250. a question about local feedback

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