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  1. Supratek
  2. remote OPT, stupid idea ?
  3. Autoformer output stage
  4. Remote Power Supply: A Stupid Idea?
  5. Rjm simple tube phono pre
  6. Voltage controlled filter with tubes ??
  7. Does this look right to you?
  8. PWM amplifier hooked onto a tube preamp
  9. Zenith Console Opt Question, Odd Secondary
  10. Marchand LN108 Tube Phono Preamp
  11. Anyone care to express an opinion on this output Transformer
  12. 6L6 Triode strapped amp suggestions
  13. 6F1 and 6P2 Equivalents
  14. in memoriam Fred N. AKA 807
  15. Perplexed by 5AR4 Tube Socket? Picture Included
  16. Push pull 300B and more than a few questions...
  17. First tube project.
  18. DHT learning
  19. how do i add adjustable bias on amp?
  20. Tube tester: Accurate Instruments Model 157
  21. "El Cheapo Valve Phono" using 6ER5=>12AT7WC?
  22. Design Questions
  23. SRPP + Gainclone
  24. dht p-p filament question
  25. Report - 2005 London HiFi Show
  26. Want to build hi - power amp
  27. Gibson Skylark Grouding Questions
  28. Can I mod this circuit to use 6922 tubes?
  29. tube preamp kit question (again?)
  30. 3f4 spice models needed
  31. Back to Back transformers to get +B of 200V ??
  32. New amp project-some ideas of my own and looking for input from others...
  33. Emphasising the transients, but making the mediocre listenable
  34. Looking For a PP 6Y6GA Design
  35. Industrial vs Commercial amps and OPT's
  36. ECC99 operating points?
  37. Preamp suggestions for a tube newbie
  38. very odd thing happening in my amp... help
  39. 47 Penthode in triode mode.
  40. Capacitor value
  41. PSE bias how?
  42. GM70 Power supply
  43. interstage convert to phase splitter
  44. EL84 SE advice'n'schematics needed
  45. world's heaviest 2A3 amp?
  46. How To Tell What Tubes To Keep
  47. PX4 Trauma
  48. An amplifier project I'm looking for...
  49. Your 100volt plus moment
  50. Dynaco rectifier replacement?
  51. SET on a budget
  52. PSU Design Learning Links
  53. Expensive Commercial Amps
  54. Tube modified CD player with TDA1543
  55. Types of polypropylene capacitor....
  56. Fluorescent lamp choke - use in tube amp?
  57. Tube Overdrive
  58. Mains Transformer for EL34PP
  59. Please review schematic
  60. Wire size for projects?
  61. super simple tube amp needed...
  62. Modifing A Fender Bassman Scheme
  63. Matlab-based triode modelling software
  64. 12AT7 Pre-amp schematic, where to find?
  65. Test settings for Hickok 539A for 183/483 tube?
  66. choke input ripple level?
  67. 120 Hz Buzz Unplugged
  68. 300B like 845
  69. Guitar amp picks up radio??
  70. DC filament ground and high voltage ground
  71. Roll CALL: How many guitar amp guys are here
  72. DIY Club remote volume help?
  73. Aesthetix Rhea and I/O diagrams?
  74. Electrolytic vs polyprop capacitors
  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. Help Please Guitar Project Mess
  84. Help - tube driver for spring reverb...
  85. 6W6 as a driver
  86. Choosing the best EL34 pp opt
  87. Your opinion, please
  88. Tube surround sound
  89. Could you guys check this cascode article for me
  90. what would happen if...
  91. A Heretical Unity Gain Line Stage part III
  92. Which ECC83 tube and caps question
  93. Paralle Push Pull Simulclass
  94. organ amp question
  95. Stereo build- Mikael Abdellah's KT88 SE amp
  96. Audio Research AC21 cross over
  97. First DIY amp pics-as promised!
  98. emission-lab info
  99. Simple EL84 PP design needed
  100. 6C33 Circlotron
  101. Valves glow fierce
  102. Kirung's GM70 SE-Amps from Korea
  103. Digital Pots
  104. Troubleshooting First Tube Project
  105. Millett Low mu Preamp help
  106. thoughts about a 'universal' preamp
  107. Morgan Jones's Bevois Valley amp...
  108. Aikido line stage results? share yours
  109. Fender power transformer help
  110. HELP with breadboard layout!!!
  111. balanced line stage schematic needed
  112. Its Alive!! First Diy Amp Works!!
  113. Duncan Munro Psud primer please?
  114. Preamp volume control??
  115. Welborne 300b DRD plate current
  116. Active compensation...
  117. Calculating expected output power.
  118. Hybrid X line amp
  119. any way to fix a end cap on a 807 power tube
  120. power tube question
  121. MJ head-amp- how does it sound?
  122. Quick Aikido question
  123. What kind of amp?
  124. Problem with cathode resistor
  125. 2A3 DRD schematic wanted
  126. reduce before amplifying?
  127. 6AS7-G RCA application considerations
  128. Matisse Fantasy waveform output test
  129. El84/6bq5/ecc83 + Ef86 = Dc Pp
  130. Searching for simple circuit
  131. McIntosh MC60 Screens
  132. Improve this Pilot 240 (EL84/6BQ5)
  133. Eimac 35TG
  134. power supply issues
  135. Which Amperex ECC88 is the best?
  136. laney PA amp questions
  137. Grid battery bias on phono....
  138. EL34 identification
  139. UL vs SE
  140. 6sn7 operating points
  141. HELP! B+ voltage problem/burning power resistor
  142. are these tubes any good ?????
  143. Free Lunch/Monkey/DRD inspired 2A3
  144. E280F Triode mode operating point
  145. EL84 Guitar amp questions (long, sorry)
  146. 2nd Aikido PCB and PSU groupbuy
  147. Newbie question...
  148. Help in getting more gain out of 300B SE
  149. ECC808 what to do
  150. Microphonics When Hot, Raytheon CK5842
  151. MOSCODE hybrid DIY
  152. transformer question
  153. help, my amp humz
  154. Le tube preamp
  155. Ideal operating point of 6sj7
  156. Convert a non-valve amp to a Valve (tube) Amp
  157. Anyone tried the Hammond 1642SE in a BIG SE amp?
  158. MOSFET current source as triode load
  159. C-core transformers
  160. choke and choke
  161. High Voltage Power Supply Caps
  162. suggestions for 300B tubes
  163. Differential input stage
  164. rca conversion
  165. heating
  166. Russian 6N8S/1578
  167. DIY tube amp squeals when turned up
  168. ECL80-Amp from Andreas Kirschner
  169. HSS preamp, anyone care to comment
  170. help me design an input stage for 6b4G PP
  171. Instrument/Microphone Tube Pre-amp
  172. first-time tube DIY project...phono preamp
  173. A question regarding schematics
  174. My first creation
  175. Your opinion on this VCCS heater supply please.
  176. Looking for ORIGINAL GE 6L6GC
  177. Need help - O/T trannies for future project
  178. ECL82 (6BM8) PP Stereo
  179. first DIY amp start up-yowza HELP!
  180. Ronette Info
  181. GE 5687 (5 stars)
  182. vox ac4
  183. Help: Toroid choke for a preamp
  184. Who makes a 1962 Bassman head chassis?
  185. does meter degrade sound ?
  186. Eye Tube (1629) controller help
  187. Scott 99B & 99C Public Auction Find
  188. tube id book
  189. radio , tv station and radar stations still use the best single end class a amplifier
  190. Stupid question?
  191. looking for ideas on a small tube amp stand?
  192. Cascode gain stage info?????
  193. hi gain preamp
  194. Tube flashing
  195. Bogen tube amp with variable Damping Factor
  196. Question re Allen Wright PP-1cs
  197. What is a good Tube tester to get?
  198. High Gain Preamp
  199. SACThailand
  200. You know you're a tube junky when...
  201. 6AU6 to do EF86 duty?
  202. 6Н28Б-В datasheet?
  203. Is single ended Class A better than push-pull?
  204. Is 845 better than 211 tube amplifier?
  205. Cool Fireworks (tubes are tough!)
  206. Big Big hum ???
  207. 5687 filament heater question
  208. Anyone know agood MOSFET drive for RCA 811A Tube?
  209. Who is into musical instrument tube amplification?
  210. buffer stage ECC88 or ECC83?
  211. EL34 Integrated
  212. Solid state HT regulator??
  213. Tubes driving dipole mids
  214. How do I turn an high current signal into a line level signal??
  215. Peer review, UL question
  216. Grundig TK60 - Where is the Line Out ?
  217. 12AX7, EL34 or 6L6 design wanted
  218. RCA to Speakers?
  219. Morgan Jones - Valve books
  220. Any one tried to use subminiature for input tubes?
  221. Tube data for current manufacturers?
  222. Pentode to Triode Switch
  223. fried Heatkit IP-17 power supply
  224. Suggestions for Tube Amplifier
  225. SMPS for 300B heater ?
  226. What does this mean?
  227. heater/cathode query
  228. Bottlehead S.E.X Amp
  229. Old Meets New
  230. 6336-SE modification
  231. 6as7 pre-amp questions.
  232. Help in calculating NFB loop.
  233. ECL86 - quick and dirty
  234. Help! Q? about Ohm load in '59 Bassman RI
  235. preamp tubes change
  236. Parallel PP ECL86
  237. Anyone build a Minimal Reactance PSU?
  238. Transformer hook-up question to 115V AC line
  239. Langevin Schematic Archive
  240. PPP EL84 Amp
  241. Interesting comparison between NOS RCA 12ax7, Chinese 12ax7a
  242. Aikido: Width control
  243. Shielded Input Wire
  244. choke
  245. Multiple Inputs in One Shielded Cable?
  246. Presence control on a SE ?
  247. Question : pentode ccs schematic ?
  248. right capacitor value?
  249. Anybody knows this tube--WE 430C
  250. Transformer substitution help

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