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  1. EL34 Feedback circuit
  2. Spice model for EL86/6CW5
  3. Ditching some High Voltage
  4. Newbie want to build simple tube preamp&psu!need help!
  5. Phono Pre-Design Input
  6. HV Direct Drive tube amp.
  7. A question about Cathodyne/split load/concertina PI's
  8. Kofi Annan in: "Hummin' Trafo Blues"
  9. Rattling Tube
  10. Berning output buffer
  11. Tube PSU Question
  12. JoLida Envoy PreAmp or DIY?
  13. Looking for Audio Note P1SE schematics.
  14. Which SE-ECL82 amp to build?
  15. PSU Help
  16. Help for stabilisator Data
  17. How much ripple on B+ is allowed?
  18. Typical 2A3 hum?
  19. PV10 PS transformer
  20. 300B Filament Voltage Range
  21. Mullard EL34-Authenticity Verification
  22. Fading or Frying Fender Clone Issue
  23. Philips V30M amplifier
  24. PWM power supply???
  25. Regulated psu for tube preamp
  26. About to start a new project: PP 6CK4s...
  27. Komuro DC 300B crct w/ 50dht?
  28. Anyone out there try a SEPP OTL guitar amp??
  29. DIY speaker attenuator?
  30. So what are some good 7-pin, hi mu, low noise/microphonic tubes??
  31. Audio meet pics from this past weekend
  32. Audio Note M7 Line Preamp??
  33. PP 7591 amp
  34. Tube op amps
  35. Please tell me how to upgrade Music Angel KT88 amplifier?
  36. Do I want a fan?
  37. 3rd Aikido?
  38. More Questions about A.Wrights PP1C
  39. 7591s flashing on start-up?
  40. first amp build... wiring questions
  41. pentode aikido driver for 300b
  42. Question about single NOS triodes in cascode for fun
  43. oscillating PP EL84 amplifier
  44. 6H30P based cathode-follower schema kindly requested
  45. Cathode follower question
  46. Bunch of old parts, worth anything?
  47. 6922 vs. 6N1P Bass Response
  48. Behringer reaches a new high in tube "transparency"
  49. Input stage tube
  50. Using transformers as choke?
  51. Resistors
  52. melos gk1 preamps anybody?
  53. Looking for a thread...
  54. DG7-32 based oscillograph schematic needed
  55. Try!!! Ef37a + 6c33c
  56. qustion on tube grade wiring
  57. Balanced pre-amp attempt
  58. GRRR.. sanity check on PTx current please
  59. How do you measure ripple on the B+?
  60. Aikido + EL34 Integrated
  61. heater voltage: why ac, and not dc?
  62. Ideas for using one ECL82 in a preamp
  63. Question about 12AU7
  64. 6AU6, 6U8, 6CL6, plus UTC A-10 make Mic Pre?
  65. WIMA FKP1 1000V as coupling cap ??
  66. Ping amperex re: Hammond organs
  67. schematic needen variable power supply
  68. Distributed Load/Balanced Bridge Connection
  69. CCS, feedback and grid leak questions.
  70. Vdd
  71. Help with 6GW8/ECL86 tubes??
  72. Best amplifier (recomendations) for Fostex FE108ez?
  73. Quick valve construction question
  74. Poindexter's 6v6 PP amp
  75. need some help with Ohm's law-fast!
  76. hybrid rectifier question
  77. I really, really wish I hadn't done that...
  78. Quicksilver 8417 conversion
  79. Supratek
  80. remote OPT, stupid idea ?
  81. Autoformer output stage
  82. Remote Power Supply: A Stupid Idea?
  83. Rjm simple tube phono pre
  84. Voltage controlled filter with tubes ??
  85. Does this look right to you?
  86. PWM amplifier hooked onto a tube preamp
  87. Zenith Console Opt Question, Odd Secondary
  88. Marchand LN108 Tube Phono Preamp
  89. Anyone care to express an opinion on this output Transformer
  90. 6L6 Triode strapped amp suggestions
  91. 6F1 and 6P2 Equivalents
  92. in memoriam Fred N. AKA 807
  93. Perplexed by 5AR4 Tube Socket? Picture Included
  94. Push pull 300B and more than a few questions...
  95. First tube project.
  96. DHT learning
  97. how do i add adjustable bias on amp?
  98. Tube tester: Accurate Instruments Model 157
  99. "El Cheapo Valve Phono" using 6ER5=>12AT7WC?
  100. Design Questions
  101. SRPP + Gainclone
  102. dht p-p filament question
  103. Report - 2005 London HiFi Show
  104. Want to build hi - power amp
  105. Gibson Skylark Grouding Questions
  106. Can I mod this circuit to use 6922 tubes?
  107. tube preamp kit question (again?)
  108. 3f4 spice models needed
  109. Back to Back transformers to get +B of 200V ??
  110. New amp project-some ideas of my own and looking for input from others...
  111. Emphasising the transients, but making the mediocre listenable
  112. Looking For a PP 6Y6GA Design
  113. Industrial vs Commercial amps and OPT's
  114. ECC99 operating points?
  115. Preamp suggestions for a tube newbie
  116. very odd thing happening in my amp... help
  117. 47 Penthode in triode mode.
  118. Capacitor value
  119. PSE bias how?
  120. GM70 Power supply
  121. interstage convert to phase splitter
  122. EL84 SE advice'n'schematics needed
  123. world's heaviest 2A3 amp?
  124. How To Tell What Tubes To Keep
  125. PX4 Trauma
  126. An amplifier project I'm looking for...
  127. Your 100volt plus moment
  128. Dynaco rectifier replacement?
  129. SET on a budget
  130. PSU Design Learning Links
  131. Expensive Commercial Amps
  132. Tube modified CD player with TDA1543
  133. Types of polypropylene capacitor....
  134. Fluorescent lamp choke - use in tube amp?
  135. Tube Overdrive
  136. Mains Transformer for EL34PP
  137. Please review schematic
  138. Wire size for projects?
  139. super simple tube amp needed...
  140. Modifing A Fender Bassman Scheme
  141. Matlab-based triode modelling software
  142. 12AT7 Pre-amp schematic, where to find?
  143. Test settings for Hickok 539A for 183/483 tube?
  144. choke input ripple level?
  145. 120 Hz Buzz Unplugged
  146. 300B like 845
  147. Guitar amp picks up radio??
  148. DC filament ground and high voltage ground
  149. Roll CALL: How many guitar amp guys are here
  150. DIY Club remote volume help?
  151. Aesthetix Rhea and I/O diagrams?
  152. Electrolytic vs polyprop capacitors
  153. Cathode Bypass Cap questions
  154. rectification and xfmr stress
  155. Audio Research
  156. Anybody got Melos MA-111 Schematic?
  157. Problem locating power supply
  158. Timer Relay
  159. Help With Jukebox Amp
  160. Help the Idiot: Simple, Great-Sounding Integrated Amp Designs
  161. Help Please Guitar Project Mess
  162. Help - tube driver for spring reverb...
  163. 6W6 as a driver
  164. Choosing the best EL34 pp opt
  165. Your opinion, please
  166. Tube surround sound
  167. Could you guys check this cascode article for me
  168. what would happen if...
  169. A Heretical Unity Gain Line Stage part III
  170. Which ECC83 tube and caps question
  171. Paralle Push Pull Simulclass
  172. organ amp question
  173. Stereo build- Mikael Abdellah's KT88 SE amp
  174. Audio Research AC21 cross over
  175. First DIY amp pics-as promised!
  176. emission-lab info
  177. Simple EL84 PP design needed
  178. 6C33 Circlotron
  179. Valves glow fierce
  180. Kirung's GM70 SE-Amps from Korea
  181. Digital Pots
  182. Troubleshooting First Tube Project
  183. Millett Low mu Preamp help
  184. thoughts about a 'universal' preamp
  185. Morgan Jones's Bevois Valley amp...
  186. Aikido line stage results? share yours
  187. Fender power transformer help
  188. HELP with breadboard layout!!!
  189. balanced line stage schematic needed
  190. Its Alive!! First Diy Amp Works!!
  191. Duncan Munro Psud primer please?
  192. Preamp volume control??
  193. Welborne 300b DRD plate current
  194. Active compensation...
  195. Calculating expected output power.
  196. Hybrid X line amp
  197. any way to fix a end cap on a 807 power tube
  198. power tube question
  199. MJ head-amp- how does it sound?
  200. Quick Aikido question
  201. What kind of amp?
  202. Problem with cathode resistor
  203. 2A3 DRD schematic wanted
  204. reduce before amplifying?
  205. 6AS7-G RCA application considerations
  206. Matisse Fantasy waveform output test
  207. El84/6bq5/ecc83 + Ef86 = Dc Pp
  208. Searching for simple circuit
  209. McIntosh MC60 Screens
  210. Improve this Pilot 240 (EL84/6BQ5)
  211. Eimac 35TG
  212. power supply issues
  213. Which Amperex ECC88 is the best?
  214. laney PA amp questions
  215. Grid battery bias on phono....
  216. EL34 identification
  217. UL vs SE
  218. 6sn7 operating points
  219. HELP! B+ voltage problem/burning power resistor
  220. are these tubes any good ?????
  221. Free Lunch/Monkey/DRD inspired 2A3
  222. E280F Triode mode operating point
  223. EL84 Guitar amp questions (long, sorry)
  224. 2nd Aikido PCB and PSU groupbuy
  225. Newbie question...
  226. Help in getting more gain out of 300B SE
  227. ECC808 what to do
  228. Microphonics When Hot, Raytheon CK5842
  229. MOSCODE hybrid DIY
  230. transformer question
  231. help, my amp humz
  232. Le tube preamp
  233. Ideal operating point of 6sj7
  234. Anyone tried the Hammond 1642SE in a BIG SE amp?
  235. MOSFET current source as triode load
  236. C-core transformers
  237. choke and choke
  238. High Voltage Power Supply Caps
  239. suggestions for 300B tubes
  240. Differential input stage
  241. rca conversion
  242. heating
  243. Russian 6N8S/1578
  244. DIY tube amp squeals when turned up
  245. ECL80-Amp from Andreas Kirschner
  246. HSS preamp, anyone care to comment
  247. help me design an input stage for 6b4G PP
  248. Instrument/Microphone Tube Pre-amp
  249. first-time tube DIY project...phono preamp
  250. A question regarding schematics

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