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  1. DHT learning
  2. how do i add adjustable bias on amp?
  3. Tube tester: Accurate Instruments Model 157
  4. "El Cheapo Valve Phono" using 6ER5=>12AT7WC?
  5. Design Questions
  6. SRPP + Gainclone
  7. dht p-p filament question
  8. Report - 2005 London HiFi Show
  9. Want to build hi - power amp
  10. Can I mod this circuit to use 6922 tubes?
  11. tube preamp kit question (again?)
  12. 3f4 spice models needed
  13. Back to Back transformers to get +B of 200V ??
  14. New amp project-some ideas of my own and looking for input from others...
  15. Emphasising the transients, but making the mediocre listenable
  16. Looking For a PP 6Y6GA Design
  17. Industrial vs Commercial amps and OPT's
  18. ECC99 operating points?
  19. Preamp suggestions for a tube newbie
  20. very odd thing happening in my amp... help
  21. 47 Penthode in triode mode.
  22. Capacitor value
  23. PSE bias how?
  24. GM70 Power supply
  25. interstage convert to phase splitter
  26. EL84 SE advice'n'schematics needed
  27. world's heaviest 2A3 amp?
  28. How To Tell What Tubes To Keep
  29. PX4 Trauma
  30. An amplifier project I'm looking for...
  31. Your 100volt plus moment
  32. Dynaco rectifier replacement?
  33. SET on a budget
  34. PSU Design Learning Links
  35. Expensive Commercial Amps
  36. Tube modified CD player with TDA1543
  37. Fluorescent lamp choke - use in tube amp?
  38. Tube Overdrive
  39. Mains Transformer for EL34PP
  40. Please review schematic
  41. Wire size for projects?
  42. super simple tube amp needed...
  43. Matlab-based triode modelling software
  44. 12AT7 Pre-amp schematic, where to find?
  45. Test settings for Hickok 539A for 183/483 tube?
  46. choke input ripple level?
  47. 120 Hz Buzz Unplugged
  48. 300B like 845
  49. DC filament ground and high voltage ground
  50. DIY Club remote volume help?
  51. Aesthetix Rhea and I/O diagrams?
  52. Cathode Bypass Cap questions
  53. rectification and xfmr stress
  54. Audio Research
  55. Anybody got Melos MA-111 Schematic?
  56. Problem locating power supply
  57. Timer Relay
  58. Help With Jukebox Amp
  59. Help the Idiot: Simple, Great-Sounding Integrated Amp Designs
  60. 6W6 as a driver
  61. Choosing the best EL34 pp opt
  62. Your opinion, please
  63. Tube surround sound
  64. Could you guys check this cascode article for me
  65. what would happen if...
  66. A Heretical Unity Gain Line Stage part III
  67. Which ECC83 tube and caps question
  68. Paralle Push Pull Simulclass
  69. organ amp question
  70. Stereo build- Mikael Abdellah's KT88 SE amp
  71. Audio Research AC21 cross over
  72. First DIY amp pics-as promised!
  73. emission-lab info
  74. Simple EL84 PP design needed
  75. 6C33 Circlotron
  76. Valves glow fierce
  77. Kirung's GM70 SE-Amps from Korea
  78. Digital Pots
  79. Troubleshooting First Tube Project
  80. Millett Low mu Preamp help
  81. thoughts about a 'universal' preamp
  82. Morgan Jones's Bevois Valley amp...
  83. Aikido line stage results? share yours
  84. HELP with breadboard layout!!!
  85. balanced line stage schematic needed
  86. Its Alive!! First Diy Amp Works!!
  87. Duncan Munro Psud primer please?
  88. Preamp volume control??
  89. Welborne 300b DRD plate current
  90. Active compensation...
  91. Calculating expected output power.
  92. Hybrid X line amp
  93. any way to fix a end cap on a 807 power tube
  94. power tube question
  95. MJ head-amp- how does it sound?
  96. Quick Aikido question
  97. What kind of amp?
  98. Problem with cathode resistor
  99. 2A3 DRD schematic wanted
  100. reduce before amplifying?
  101. 6AS7-G RCA application considerations
  102. Matisse Fantasy waveform output test
  103. El84/6bq5/ecc83 + Ef86 = Dc Pp
  104. Searching for simple circuit
  105. McIntosh MC60 Screens
  106. Improve this Pilot 240 (EL84/6BQ5)
  107. Eimac 35TG
  108. power supply issues
  109. Which Amperex ECC88 is the best?
  110. Grid battery bias on phono....
  111. EL34 identification
  112. UL vs SE
  113. 6sn7 operating points
  114. HELP! B+ voltage problem/burning power resistor
  115. are these tubes any good ?????
  116. Free Lunch/Monkey/DRD inspired 2A3
  117. E280F Triode mode operating point
  118. 2nd Aikido PCB and PSU groupbuy
  119. Newbie question...
  120. Help in getting more gain out of 300B SE
  121. ECC808 what to do
  122. Microphonics When Hot, Raytheon CK5842
  123. MOSCODE hybrid DIY
  124. transformer question
  125. help, my amp humz
  126. Le tube preamp
  127. Ideal operating point of 6sj7
  128. Anyone tried the Hammond 1642SE in a BIG SE amp?
  129. MOSFET current source as triode load
  130. C-core transformers
  131. choke and choke
  132. suggestions for 300B tubes
  133. Differential input stage
  134. rca conversion
  135. heating
  136. Russian 6N8S/1578
  137. DIY tube amp squeals when turned up
  138. ECL80-Amp from Andreas Kirschner
  139. HSS preamp, anyone care to comment
  140. help me design an input stage for 6b4G PP
  141. Instrument/Microphone Tube Pre-amp
  142. first-time tube DIY project...phono preamp
  143. A question regarding schematics
  144. My first creation
  145. Your opinion on this VCCS heater supply please.
  146. Looking for ORIGINAL GE 6L6GC
  147. Need help - O/T trannies for future project
  148. ECL82 (6BM8) PP Stereo
  149. first DIY amp start up-yowza HELP!
  150. Ronette Info
  151. GE 5687 (5 stars)
  152. Help: Toroid choke for a preamp
  153. does meter degrade sound ?
  154. Eye Tube (1629) controller help
  155. Scott 99B & 99C Public Auction Find
  156. tube id book
  157. radio , tv station and radar stations still use the best single end class a amplifier
  158. Stupid question?
  159. looking for ideas on a small tube amp stand?
  160. Cascode gain stage info?????
  161. hi gain preamp
  162. Tube flashing
  163. Bogen tube amp with variable Damping Factor
  164. Question re Allen Wright PP-1cs
  165. What is a good Tube tester to get?
  166. High Gain Preamp
  167. SACThailand
  168. You know you're a tube junky when...
  169. 6AU6 to do EF86 duty?
  170. 6Н28Б-В datasheet?
  171. Is single ended Class A better than push-pull?
  172. Is 845 better than 211 tube amplifier?
  173. Cool Fireworks (tubes are tough!)
  174. Big Big hum ???
  175. 5687 filament heater question
  176. Anyone know agood MOSFET drive for RCA 811A Tube?
  177. Who is into musical instrument tube amplification?
  178. buffer stage ECC88 or ECC83?
  179. EL34 Integrated
  180. Solid state HT regulator??
  181. Tubes driving dipole mids
  182. How do I turn an high current signal into a line level signal??
  183. Peer review, UL question
  184. Grundig TK60 - Where is the Line Out ?
  185. 12AX7, EL34 or 6L6 design wanted
  186. RCA to Speakers?
  187. Morgan Jones - Valve books
  188. Any one tried to use subminiature for input tubes?
  189. Tube data for current manufacturers?
  190. Pentode to Triode Switch
  191. fried Heatkit IP-17 power supply
  192. Suggestions for Tube Amplifier
  193. SMPS for 300B heater ?
  194. What does this mean?
  195. heater/cathode query
  196. Bottlehead S.E.X Amp
  197. Old Meets New
  198. 6336-SE modification
  199. 6as7 pre-amp questions.
  200. Help in calculating NFB loop.
  201. ECL86 - quick and dirty
  202. preamp tubes change
  203. Parallel PP ECL86
  204. Anyone build a Minimal Reactance PSU?
  205. Transformer hook-up question to 115V AC line
  206. Langevin Schematic Archive
  207. PPP EL84 Amp
  208. Interesting comparison between NOS RCA 12ax7, Chinese 12ax7a
  209. Aikido: Width control
  210. Shielded Input Wire
  211. choke
  212. Multiple Inputs in One Shielded Cable?
  213. Presence control on a SE ?
  214. Question : pentode ccs schematic ?
  215. right capacitor value?
  216. Anybody knows this tube--WE 430C
  217. Transformer substitution help
  218. CFB Issues
  219. Please Suggest: Old Tube Usages
  220. Very powerful push/pull circuit
  221. Project choice for KT88
  222. Tamura F-475 in Parafeed?
  223. Kofi Annan in: "Push and Pull with Me"
  224. Schmitt dephaser
  225. Anyone using Chelmer Valves?
  226. SET w/ 300B Ultrapath + Parafeed Typologies
  227. a question about local feedback
  228. about input transformer
  229. Power transformer selection madness
  230. EF91 Line Stage questions
  231. Sourcing parts for Dynaco PAS rebuild
  232. HH Scott 223 monoblock schematics
  233. info needed on the 7c6 tube
  234. A final question on grounding(yeah right!)
  235. Schematics and Manuals Site Found
  236. Sprague/Cap Color Codes ?
  237. saba console radio working?
  238. Feedback and mu-followers
  239. Hundreds of 6AL5s
  240. Orange/Red Spot on The Anode of Sovtek 6L6GC
  241. Best way to isolate non-isolated RCAs?
  242. Power Resistor Smoking on HF-81
  243. Audio Innovations L-2
  244. first tube project
  245. And now a question about power switch...
  246. 2E24 ultralinear
  247. tube pin numbers
  248. Will This possibly work?
  249. What is the right current for a 300B at 400V and -80V grid bias?
  250. Simple Cap-Coupled CF Advise Needed

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