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  1. help building 12ax7/el84 amp
  2. PSE schematic
  3. Using PSU Designer to calculate DC filament supply
  4. Dynaco stereo 70 driver board
  5. Excellent and cheap DIY INTERSTAGE!
  6. Need Advice with Timer Relay Shut Off
  7. standby switch
  8. Purpose of small cap across PSU rails?
  9. 6SL7 + EL34 SE Audio Amp
  10. guitar tube amp as home stereo
  11. 6C33 fixed/auto bias ?
  12. Long Tail and Local feedback
  13. I look for EAR 859 pictures.
  14. Designing a simple tube opamp?
  15. Difference between Hammond 200 and 300 series
  16. Ultrapath Cap
  17. where to find 600v 18awg wire??
  18. Suggested power supply B+?
  19. Variable Impedence Mic Preamp
  20. Help me stop my preamp from farting!
  21. Just bought some of those Russian paper/oil caps off of ebay
  22. The Valhalla power amplifier project
  23. help! EL84's dying
  24. Could check this pentode-mu stage thingy for me (disclaimer* it is for a gutar amp)
  25. ASC Polypropylene And Oil Capacitors
  26. pots... log or linear?
  27. Cracking sound through speakers.
  28. EL84-PP - Why just 5W?
  29. Brook12a schematics...
  30. LongTailedPair gain -> how to calculate?
  31. Wiring secondaries of two power trafo's in parallel?
  32. RIAA "Tube Simulations"
  33. Has anyone built this 'Svetlana Six Pack' ?
  34. updated pics of tube project
  35. help 12FV7 datasheet
  36. Why does my oversized preamp trafo gets much too hot?!?!?
  37. 6sn7 pre
  38. 12AY7/6SN7 preamp PSU check
  39. CT design trans application
  40. Shindo schematics?
  41. Octal Hagerman Cornet Experiences
  42. My first (guitar) amplifier
  43. Zenith AM/FM C835 tube Radio schematic
  44. Oh man, my telefunken stoops...
  45. 42 single ended
  46. EL34 Feedback circuit
  47. Spice model for EL86/6CW5
  48. Ditching some High Voltage
  49. Newbie want to build simple tube preamp&psu!need help!
  50. Phono Pre-Design Input
  51. HV Direct Drive tube amp.
  52. A question about Cathodyne/split load/concertina PI's
  53. Kofi Annan in: "Hummin' Trafo Blues"
  54. Rattling Tube
  55. Berning output buffer
  56. Tube PSU Question
  57. JoLida Envoy PreAmp or DIY?
  58. Looking for Audio Note P1SE schematics.
  59. Which SE-ECL82 amp to build?
  60. PSU Help
  61. Help for stabilisator Data
  62. How much ripple on B+ is allowed?
  63. Typical 2A3 hum?
  64. PV10 PS transformer
  65. 300B Filament Voltage Range
  66. Mullard EL34-Authenticity Verification
  67. Fading or Frying Fender Clone Issue
  68. Philips V30M amplifier
  69. PWM power supply???
  70. Regulated psu for tube preamp
  71. About to start a new project: PP 6CK4s...
  72. Komuro DC 300B crct w/ 50dht?
  73. Anyone out there try a SEPP OTL guitar amp??
  74. DIY speaker attenuator?
  75. So what are some good 7-pin, hi mu, low noise/microphonic tubes??
  76. Audio meet pics from this past weekend
  77. Audio Note M7 Line Preamp??
  78. PP 7591 amp
  79. Tube op amps
  80. Please tell me how to upgrade Music Angel KT88 amplifier?
  81. Do I want a fan?
  82. 3rd Aikido?
  83. More Questions about A.Wrights PP1C
  84. 7591s flashing on start-up?
  85. first amp build... wiring questions
  86. pentode aikido driver for 300b
  87. Question about single NOS triodes in cascode for fun
  88. oscillating PP EL84 amplifier
  89. 6H30P based cathode-follower schema kindly requested
  90. Cathode follower question
  91. Bunch of old parts, worth anything?
  92. 6922 vs. 6N1P Bass Response
  93. Behringer reaches a new high in tube "transparency"
  94. Input stage tube
  95. Using transformers as choke?
  96. Resistors
  97. melos gk1 preamps anybody?
  98. Looking for a thread...
  99. DG7-32 based oscillograph schematic needed
  100. Try!!! Ef37a + 6c33c
  101. qustion on tube grade wiring
  102. Balanced pre-amp attempt
  103. GRRR.. sanity check on PTx current please
  104. How do you measure ripple on the B+?
  105. Aikido + EL34 Integrated
  106. heater voltage: why ac, and not dc?
  107. Ideas for using one ECL82 in a preamp
  108. Question about 12AU7
  109. 6AU6, 6U8, 6CL6, plus UTC A-10 make Mic Pre?
  110. WIMA FKP1 1000V as coupling cap ??
  111. Ping amperex re: Hammond organs
  112. schematic needen variable power supply
  113. Distributed Load/Balanced Bridge Connection
  114. CCS, feedback and grid leak questions.
  115. Vdd
  116. Help with 6GW8/ECL86 tubes??
  117. Best amplifier (recomendations) for Fostex FE108ez?
  118. Quick valve construction question
  119. Poindexter's 6v6 PP amp
  120. need some help with Ohm's law-fast!
  121. hybrid rectifier question
  122. I really, really wish I hadn't done that...
  123. Quicksilver 8417 conversion
  124. Supratek
  125. remote OPT, stupid idea ?
  126. Autoformer output stage
  127. Remote Power Supply: A Stupid Idea?
  128. Rjm simple tube phono pre
  129. Voltage controlled filter with tubes ??
  130. Does this look right to you?
  131. PWM amplifier hooked onto a tube preamp
  132. Zenith Console Opt Question, Odd Secondary
  133. Marchand LN108 Tube Phono Preamp
  134. Anyone care to express an opinion on this output Transformer
  135. 6L6 Triode strapped amp suggestions
  136. 6F1 and 6P2 Equivalents
  137. in memoriam Fred N. AKA 807
  138. Perplexed by 5AR4 Tube Socket? Picture Included
  139. Push pull 300B and more than a few questions...
  140. First tube project.
  141. DHT learning
  142. how do i add adjustable bias on amp?
  143. Tube tester: Accurate Instruments Model 157
  144. "El Cheapo Valve Phono" using 6ER5=>12AT7WC?
  145. Design Questions
  146. SRPP + Gainclone
  147. dht p-p filament question
  148. Report - 2005 London HiFi Show
  149. Want to build hi - power amp
  150. Gibson Skylark Grouding Questions
  151. Can I mod this circuit to use 6922 tubes?
  152. tube preamp kit question (again?)
  153. 3f4 spice models needed
  154. Back to Back transformers to get +B of 200V ??
  155. New amp project-some ideas of my own and looking for input from others...
  156. Emphasising the transients, but making the mediocre listenable
  157. Looking For a PP 6Y6GA Design
  158. Industrial vs Commercial amps and OPT's
  159. ECC99 operating points?
  160. Preamp suggestions for a tube newbie
  161. very odd thing happening in my amp... help
  162. 47 Penthode in triode mode.
  163. Capacitor value
  164. PSE bias how?
  165. GM70 Power supply
  166. interstage convert to phase splitter
  167. EL84 SE advice'n'schematics needed
  168. world's heaviest 2A3 amp?
  169. How To Tell What Tubes To Keep
  170. PX4 Trauma
  171. An amplifier project I'm looking for...
  172. Your 100volt plus moment
  173. Dynaco rectifier replacement?
  174. SET on a budget
  175. PSU Design Learning Links
  176. Expensive Commercial Amps
  177. Tube modified CD player with TDA1543
  178. Types of polypropylene capacitor....
  179. Fluorescent lamp choke - use in tube amp?
  180. Tube Overdrive
  181. Mains Transformer for EL34PP
  182. Please review schematic
  183. Wire size for projects?
  184. super simple tube amp needed...
  185. Modifing A Fender Bassman Scheme
  186. Matlab-based triode modelling software
  187. 12AT7 Pre-amp schematic, where to find?
  188. Test settings for Hickok 539A for 183/483 tube?
  189. choke input ripple level?
  190. 120 Hz Buzz Unplugged
  191. 300B like 845
  192. Guitar amp picks up radio??
  193. DC filament ground and high voltage ground
  194. Roll CALL: How many guitar amp guys are here
  195. DIY Club remote volume help?
  196. Aesthetix Rhea and I/O diagrams?
  197. Electrolytic vs polyprop capacitors
  198. Cathode Bypass Cap questions
  199. rectification and xfmr stress
  200. Audio Research
  201. Anybody got Melos MA-111 Schematic?
  202. Problem locating power supply
  203. Timer Relay
  204. Help With Jukebox Amp
  205. Help the Idiot: Simple, Great-Sounding Integrated Amp Designs
  206. Help Please Guitar Project Mess
  207. Help - tube driver for spring reverb...
  208. 6W6 as a driver
  209. Choosing the best EL34 pp opt
  210. Your opinion, please
  211. Tube surround sound
  212. Could you guys check this cascode article for me
  213. what would happen if...
  214. A Heretical Unity Gain Line Stage part III
  215. Which ECC83 tube and caps question
  216. Paralle Push Pull Simulclass
  217. organ amp question
  218. Stereo build- Mikael Abdellah's KT88 SE amp
  219. Audio Research AC21 cross over
  220. First DIY amp pics-as promised!
  221. emission-lab info
  222. Simple EL84 PP design needed
  223. 6C33 Circlotron
  224. Valves glow fierce
  225. Kirung's GM70 SE-Amps from Korea
  226. Digital Pots
  227. Troubleshooting First Tube Project
  228. Millett Low mu Preamp help
  229. thoughts about a 'universal' preamp
  230. Morgan Jones's Bevois Valley amp...
  231. Aikido line stage results? share yours
  232. Fender power transformer help
  233. HELP with breadboard layout!!!
  234. balanced line stage schematic needed
  235. Its Alive!! First Diy Amp Works!!
  236. Duncan Munro Psud primer please?
  237. Preamp volume control??
  238. Welborne 300b DRD plate current
  239. Active compensation...
  240. Calculating expected output power.
  241. Hybrid X line amp
  242. any way to fix a end cap on a 807 power tube
  243. power tube question
  244. MJ head-amp- how does it sound?
  245. Quick Aikido question
  246. What kind of amp?
  247. Problem with cathode resistor
  248. 2A3 DRD schematic wanted
  249. reduce before amplifying?
  250. 6AS7-G RCA application considerations

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