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  1. Van der Veen transformers
  2. Want to upgrade Velleman K8020
  3. KT88 Power supply question
  4. TX coupled, pentode linestage
  5. phase splitter question
  6. New preamp project is online
  7. Newbie: Which amps to build?
  8. Which valve, 5842 (417A) or 6H30
  9. paralelled tube
  10. ECC88 at 12 volts
  11. azarus preamplifier schematics
  12. Which valve amp do I keep?
  13. Favorite Driver for 845
  14. Somebody has that magazine?
  15. modify parallel push-pull EL84 to single push-pull
  16. How long it will last?
  17. Hurricane Wilma
  18. Suddenly, no output from Copland CTA-501
  19. 807 Audio Amp Progress Report
  20. Choke induced Hum
  21. Wim's DC EL84 amp
  22. Drivers for a KT88 pair
  23. what do u think of these tubes?
  24. 12BH7 spice 3f4 model
  25. Clone Marantz M7 Line Amp
  26. 6HF5 sweep tube single ended amp
  27. My first DIY
  28. Winding A Interstage Transformer
  29. help building 12ax7/el84 amp
  30. PSE schematic
  31. Using PSU Designer to calculate DC filament supply
  32. Dynaco stereo 70 driver board
  33. Excellent and cheap DIY INTERSTAGE!
  34. Need Advice with Timer Relay Shut Off
  35. standby switch
  36. Purpose of small cap across PSU rails?
  37. 6SL7 + EL34 SE Audio Amp
  38. 6C33 fixed/auto bias ?
  39. Long Tail and Local feedback
  40. I look for EAR 859 pictures.
  41. Designing a simple tube opamp?
  42. Difference between Hammond 200 and 300 series
  43. Ultrapath Cap
  44. where to find 600v 18awg wire??
  45. Suggested power supply B+?
  46. Variable Impedence Mic Preamp
  47. Help me stop my preamp from farting!
  48. The Valhalla power amplifier project
  49. help! EL84's dying
  50. Could check this pentode-mu stage thingy for me (disclaimer* it is for a gutar amp)
  51. ASC Polypropylene And Oil Capacitors
  52. pots... log or linear?
  53. Cracking sound through speakers.
  54. EL84-PP - Why just 5W?
  55. Brook12a schematics...
  56. LongTailedPair gain -> how to calculate?
  57. Wiring secondaries of two power trafo's in parallel?
  58. RIAA "Tube Simulations"
  59. Has anyone built this 'Svetlana Six Pack' ?
  60. updated pics of tube project
  61. help 12FV7 datasheet
  62. Why does my oversized preamp trafo gets much too hot?!?!?
  63. 6sn7 pre
  64. 12AY7/6SN7 preamp PSU check
  65. CT design trans application
  66. Shindo schematics?
  67. Octal Hagerman Cornet Experiences
  68. Zenith AM/FM C835 tube Radio schematic
  69. Oh man, my telefunken stoops...
  70. 42 single ended
  71. EL34 Feedback circuit
  72. Spice model for EL86/6CW5
  73. Ditching some High Voltage
  74. Newbie want to build simple tube preamp&psu!need help!
  75. Phono Pre-Design Input
  76. HV Direct Drive tube amp.
  77. A question about Cathodyne/split load/concertina PI's
  78. Kofi Annan in: "Hummin' Trafo Blues"
  79. Rattling Tube
  80. Berning output buffer
  81. Tube PSU Question
  82. JoLida Envoy PreAmp or DIY?
  83. Looking for Audio Note P1SE schematics.
  84. Which SE-ECL82 amp to build?
  85. PSU Help
  86. Help for stabilisator Data
  87. How much ripple on B+ is allowed?
  88. Typical 2A3 hum?
  89. PV10 PS transformer
  90. 300B Filament Voltage Range
  91. Mullard EL34-Authenticity Verification
  92. Philips V30M amplifier
  93. PWM power supply???
  94. Regulated psu for tube preamp
  95. About to start a new project: PP 6CK4s...
  96. Komuro DC 300B crct w/ 50dht?
  97. DIY speaker attenuator?
  98. So what are some good 7-pin, hi mu, low noise/microphonic tubes??
  99. Audio meet pics from this past weekend
  100. Audio Note M7 Line Preamp??
  101. PP 7591 amp
  102. Tube op amps
  103. Please tell me how to upgrade Music Angel KT88 amplifier?
  104. Do I want a fan?
  105. 3rd Aikido?
  106. More Questions about A.Wrights PP1C
  107. 7591s flashing on start-up?
  108. first amp build... wiring questions
  109. pentode aikido driver for 300b
  110. Question about single NOS triodes in cascode for fun
  111. oscillating PP EL84 amplifier
  112. 6H30P based cathode-follower schema kindly requested
  113. Cathode follower question
  114. Bunch of old parts, worth anything?
  115. 6922 vs. 6N1P Bass Response
  116. Behringer reaches a new high in tube "transparency"
  117. Input stage tube
  118. Using transformers as choke?
  119. Resistors
  120. melos gk1 preamps anybody?
  121. Looking for a thread...
  122. DG7-32 based oscillograph schematic needed
  123. Try!!! Ef37a + 6c33c
  124. qustion on tube grade wiring
  125. Balanced pre-amp attempt
  126. GRRR.. sanity check on PTx current please
  127. How do you measure ripple on the B+?
  128. Aikido + EL34 Integrated
  129. heater voltage: why ac, and not dc?
  130. Ideas for using one ECL82 in a preamp
  131. Question about 12AU7
  132. 6AU6, 6U8, 6CL6, plus UTC A-10 make Mic Pre?
  133. WIMA FKP1 1000V as coupling cap ??
  134. Ping amperex re: Hammond organs
  135. schematic needen variable power supply
  136. Distributed Load/Balanced Bridge Connection
  137. CCS, feedback and grid leak questions.
  138. Vdd
  139. Help with 6GW8/ECL86 tubes??
  140. Best amplifier (recomendations) for Fostex FE108ez?
  141. Quick valve construction question
  142. Poindexter's 6v6 PP amp
  143. need some help with Ohm's law-fast!
  144. hybrid rectifier question
  145. I really, really wish I hadn't done that...
  146. Quicksilver 8417 conversion
  147. Supratek
  148. remote OPT, stupid idea ?
  149. Autoformer output stage
  150. Remote Power Supply: A Stupid Idea?
  151. Rjm simple tube phono pre
  152. Voltage controlled filter with tubes ??
  153. Does this look right to you?
  154. PWM amplifier hooked onto a tube preamp
  155. Zenith Console Opt Question, Odd Secondary
  156. Marchand LN108 Tube Phono Preamp
  157. Anyone care to express an opinion on this output Transformer
  158. 6L6 Triode strapped amp suggestions
  159. 6F1 and 6P2 Equivalents
  160. in memoriam Fred N. AKA 807
  161. Perplexed by 5AR4 Tube Socket? Picture Included
  162. Push pull 300B and more than a few questions...
  163. First tube project.
  164. DHT learning
  165. how do i add adjustable bias on amp?
  166. "El Cheapo Valve Phono" using 6ER5=>12AT7WC?
  167. Design Questions
  168. SRPP + Gainclone
  169. dht p-p filament question
  170. Report - 2005 London HiFi Show
  171. Want to build hi - power amp
  172. Can I mod this circuit to use 6922 tubes?
  173. tube preamp kit question (again?)
  174. 3f4 spice models needed
  175. Back to Back transformers to get +B of 200V ??
  176. New amp project-some ideas of my own and looking for input from others...
  177. Emphasising the transients, but making the mediocre listenable
  178. Looking For a PP 6Y6GA Design
  179. Industrial vs Commercial amps and OPT's
  180. ECC99 operating points?
  181. Preamp suggestions for a tube newbie
  182. very odd thing happening in my amp... help
  183. 47 Penthode in triode mode.
  184. Capacitor value
  185. PSE bias how?
  186. GM70 Power supply
  187. interstage convert to phase splitter
  188. EL84 SE advice'n'schematics needed
  189. world's heaviest 2A3 amp?
  190. How To Tell What Tubes To Keep
  191. PX4 Trauma
  192. An amplifier project I'm looking for...
  193. Your 100volt plus moment
  194. Dynaco rectifier replacement?
  195. SET on a budget
  196. PSU Design Learning Links
  197. Expensive Commercial Amps
  198. Tube modified CD player with TDA1543
  199. Fluorescent lamp choke - use in tube amp?
  200. Tube Overdrive
  201. Mains Transformer for EL34PP
  202. Please review schematic
  203. Wire size for projects?
  204. super simple tube amp needed...
  205. Matlab-based triode modelling software
  206. 12AT7 Pre-amp schematic, where to find?
  207. choke input ripple level?
  208. 120 Hz Buzz Unplugged
  209. 300B like 845
  210. DC filament ground and high voltage ground
  211. DIY Club remote volume help?
  212. Aesthetix Rhea and I/O diagrams?
  213. Cathode Bypass Cap questions
  214. rectification and xfmr stress
  215. Audio Research
  216. Anybody got Melos MA-111 Schematic?
  217. Problem locating power supply
  218. Timer Relay
  219. Help With Jukebox Amp
  220. Help the Idiot: Simple, Great-Sounding Integrated Amp Designs
  221. 6W6 as a driver
  222. Choosing the best EL34 pp opt
  223. Your opinion, please
  224. Tube surround sound
  225. Could you guys check this cascode article for me
  226. what would happen if...
  227. A Heretical Unity Gain Line Stage part III
  228. Which ECC83 tube and caps question
  229. Paralle Push Pull Simulclass
  230. organ amp question
  231. Stereo build- Mikael Abdellah's KT88 SE amp
  232. Audio Research AC21 cross over
  233. First DIY amp pics-as promised!
  234. emission-lab info
  235. Simple EL84 PP design needed
  236. 6C33 Circlotron
  237. Valves glow fierce
  238. Kirung's GM70 SE-Amps from Korea
  239. Digital Pots
  240. Troubleshooting First Tube Project
  241. Millett Low mu Preamp help
  242. thoughts about a 'universal' preamp
  243. Morgan Jones's Bevois Valley amp...
  244. Aikido line stage results? share yours
  245. HELP with breadboard layout!!!
  246. balanced line stage schematic needed
  247. Its Alive!! First Diy Amp Works!!
  248. Duncan Munro Psud primer please?
  249. Preamp volume control??
  250. Welborne 300b DRD plate current

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