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  1. A Heretical Unity Gain Line Stage part III
  2. Which ECC83 tube and caps question
  3. Paralle Push Pull Simulclass
  4. organ amp question
  5. Stereo build- Mikael Abdellah's KT88 SE amp
  6. Audio Research AC21 cross over
  7. First DIY amp pics-as promised!
  8. emission-lab info
  9. Simple EL84 PP design needed
  10. 6C33 Circlotron
  11. Valves glow fierce
  12. Kirung's GM70 SE-Amps from Korea
  13. Digital Pots
  14. Troubleshooting First Tube Project
  15. Millett Low mu Preamp help
  16. thoughts about a 'universal' preamp
  17. Morgan Jones's Bevois Valley amp...
  18. Aikido line stage results? share yours
  19. Fender power transformer help
  20. HELP with breadboard layout!!!
  21. balanced line stage schematic needed
  22. Its Alive!! First Diy Amp Works!!
  23. Duncan Munro Psud primer please?
  24. Preamp volume control??
  25. Welborne 300b DRD plate current
  26. Active compensation...
  27. Calculating expected output power.
  28. Hybrid X line amp
  29. any way to fix a end cap on a 807 power tube
  30. power tube question
  31. MJ head-amp- how does it sound?
  32. Quick Aikido question
  33. What kind of amp?
  34. Problem with cathode resistor
  35. 2A3 DRD schematic wanted
  36. reduce before amplifying?
  37. 6AS7-G RCA application considerations
  38. Matisse Fantasy waveform output test
  39. El84/6bq5/ecc83 + Ef86 = Dc Pp
  40. Searching for simple circuit
  41. McIntosh MC60 Screens
  42. Improve this Pilot 240 (EL84/6BQ5)
  43. Eimac 35TG
  44. power supply issues
  45. Which Amperex ECC88 is the best?
  46. laney PA amp questions
  47. Grid battery bias on phono....
  48. EL34 identification
  49. UL vs SE
  50. 6sn7 operating points
  51. HELP! B+ voltage problem/burning power resistor
  52. are these tubes any good ?????
  53. Free Lunch/Monkey/DRD inspired 2A3
  54. E280F Triode mode operating point
  55. EL84 Guitar amp questions (long, sorry)
  56. 2nd Aikido PCB and PSU groupbuy
  57. Newbie question...
  58. Help in getting more gain out of 300B SE
  59. ECC808 what to do
  60. Microphonics When Hot, Raytheon CK5842
  61. MOSCODE hybrid DIY
  62. transformer question
  63. help, my amp humz
  64. Le tube preamp
  65. Ideal operating point of 6sj7
  66. Convert a non-valve amp to a Valve (tube) Amp
  67. Anyone tried the Hammond 1642SE in a BIG SE amp?
  68. MOSFET current source as triode load
  69. C-core transformers
  70. choke and choke
  71. High Voltage Power Supply Caps
  72. suggestions for 300B tubes
  73. Differential input stage
  74. rca conversion
  75. heating
  76. Russian 6N8S/1578
  77. DIY tube amp squeals when turned up
  78. ECL80-Amp from Andreas Kirschner
  79. HSS preamp, anyone care to comment
  80. help me design an input stage for 6b4G PP
  81. Instrument/Microphone Tube Pre-amp
  82. first-time tube DIY project...phono preamp
  83. A question regarding schematics
  84. My first creation
  85. Your opinion on this VCCS heater supply please.
  86. Looking for ORIGINAL GE 6L6GC
  87. Need help - O/T trannies for future project
  88. ECL82 (6BM8) PP Stereo
  89. first DIY amp start up-yowza HELP!
  90. Ronette Info
  91. GE 5687 (5 stars)
  92. vox ac4
  93. Help: Toroid choke for a preamp
  94. Who makes a 1962 Bassman head chassis?
  95. does meter degrade sound ?
  96. Eye Tube (1629) controller help
  97. Scott 99B & 99C Public Auction Find
  98. tube id book
  99. radio , tv station and radar stations still use the best single end class a amplifier
  100. Stupid question?
  101. looking for ideas on a small tube amp stand?
  102. Cascode gain stage info?????
  103. hi gain preamp
  104. Tube flashing
  105. Bogen tube amp with variable Damping Factor
  106. Question re Allen Wright PP-1cs
  107. What is a good Tube tester to get?
  108. High Gain Preamp
  109. SACThailand
  110. You know you're a tube junky when...
  111. 6AU6 to do EF86 duty?
  112. 6Н28Б-В datasheet?
  113. Is single ended Class A better than push-pull?
  114. Is 845 better than 211 tube amplifier?
  115. Cool Fireworks (tubes are tough!)
  116. Big Big hum ???
  117. 5687 filament heater question
  118. Anyone know agood MOSFET drive for RCA 811A Tube?
  119. Who is into musical instrument tube amplification?
  120. buffer stage ECC88 or ECC83?
  121. EL34 Integrated
  122. Solid state HT regulator??
  123. Tubes driving dipole mids
  124. How do I turn an high current signal into a line level signal??
  125. Peer review, UL question
  126. Grundig TK60 - Where is the Line Out ?
  127. 12AX7, EL34 or 6L6 design wanted
  128. RCA to Speakers?
  129. Morgan Jones - Valve books
  130. Any one tried to use subminiature for input tubes?
  131. Tube data for current manufacturers?
  132. Pentode to Triode Switch
  133. fried Heatkit IP-17 power supply
  134. Suggestions for Tube Amplifier
  135. SMPS for 300B heater ?
  136. What does this mean?
  137. heater/cathode query
  138. Bottlehead S.E.X Amp
  139. Old Meets New
  140. 6336-SE modification
  141. 6as7 pre-amp questions.
  142. Help in calculating NFB loop.
  143. ECL86 - quick and dirty
  144. Help! Q? about Ohm load in '59 Bassman RI
  145. preamp tubes change
  146. Parallel PP ECL86
  147. Anyone build a Minimal Reactance PSU?
  148. Transformer hook-up question to 115V AC line
  149. Langevin Schematic Archive
  150. PPP EL84 Amp
  151. Interesting comparison between NOS RCA 12ax7, Chinese 12ax7a
  152. Aikido: Width control
  153. Shielded Input Wire
  154. choke
  155. Multiple Inputs in One Shielded Cable?
  156. Presence control on a SE ?
  157. Question : pentode ccs schematic ?
  158. right capacitor value?
  159. Anybody knows this tube--WE 430C
  160. Transformer substitution help
  161. CFB Issues
  162. Please Suggest: Old Tube Usages
  163. Very powerful push/pull circuit
  164. Project choice for KT88
  165. Tamura F-475 in Parafeed?
  166. Kofi Annan in: "Push and Pull with Me"
  167. Schmitt dephaser
  168. Anyone using Chelmer Valves?
  169. SET w/ 300B Ultrapath + Parafeed Typologies
  170. a question about local feedback
  171. about input transformer
  172. Power transformer selection madness
  173. EF91 Line Stage questions
  174. Sourcing parts for Dynaco PAS rebuild
  175. HH Scott 223 monoblock schematics
  176. info needed on the 7c6 tube
  177. A final question on grounding(yeah right!)
  178. Schematics and Manuals Site Found
  179. Sprague/Cap Color Codes ?
  180. saba console radio working?
  181. Feedback and mu-followers
  182. Hundreds of 6AL5s
  183. Orange/Red Spot on The Anode of Sovtek 6L6GC
  184. Best way to isolate non-isolated RCAs?
  185. Power Resistor Smoking on HF-81
  186. Audio Innovations L-2
  187. first tube project
  188. And now a question about power switch...
  189. 2E24 ultralinear
  190. tube pin numbers
  191. Will This possibly work?
  192. What is the right current for a 300B at 400V and -80V grid bias?
  193. Simple Cap-Coupled CF Advise Needed
  194. tube amp layout reality check
  195. plitron
  196. How long does a 7199 last?
  197. Modding Tube Mixer Into DAW Front End
  198. CAE Cascode Diffamp Front End
  199. recommended resistor wattage
  200. 6.3V Rectifier Tube Lit by 5V
  201. Precision Electronics Amp w/ 6GT5's, Convert to 6L6's?
  202. WE121A, Please critique me
  203. Grommes / Western Electric G5M Tube Mixer Mods
  204. schemes needed
  205. PP to PPP
  206. aikido voltage swing
  207. voltage drop across a CCS...
  208. bogen db20 Schematic
  209. Mullards branded as Telefunkens???
  210. Pentodes; plate resistance; damping...
  211. PP amp has become SE?
  212. anyone mod a NYAL Moscode superIt?
  213. update to phillips sepp otl?
  214. DC filament supply LC or CL
  215. No Bass Control
  216. Unison Research Simply2 or s2schematics
  217. Border Patrol Power Supply
  218. Any leads on repairing a vintage Alamo Capri tube amp? >>
  219. nanocrystalline amorphous OPT
  220. El84 Pp
  221. Preamp, Euridice?
  222. Has anyone built a PS like this?
  223. Tube sockets in Eagle?
  224. E235L tubes
  225. Grid Input Transformers
  226. Aikido Power Supply
  227. ralph power pp amp with 807 ?
  228. fender clone, 6SJ7 vs. 6SN7
  229. tube stores in moscow
  230. 211 and 845
  231. Need help with amp
  232. Altec 1570B
  233. UL to triode
  234. How can I improve this tube amp (see pics)?
  235. klimo merlin preamp sch wanted
  236. CCS question
  237. *****es brew step 2 ... or grid bias ... how to?
  238. Filaments for the Aikido
  239. RE: RC-19 or RC-30
  240. My experience building a DRD d3A/300B amp
  241. TIP50 + LM317 High Voltage Regulator
  242. Any info on old "Cosmos" amp'?
  243. What more do I need to know?
  244. EBAY Find Of The Year Club LOL
  245. Partial feedback DHP SE amp
  246. newbie question
  247. Tube 1616
  248. Class A tube integrated circuit request
  249. Global Feedback Source Point
  250. These look interesting for that SE project

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