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  1. Digital Pots
  2. Troubleshooting First Tube Project
  3. Millett Low mu Preamp help
  4. thoughts about a 'universal' preamp
  5. Morgan Jones's Bevois Valley amp...
  6. Aikido line stage results? share yours
  7. Fender power transformer help
  8. HELP with breadboard layout!!!
  9. balanced line stage schematic needed
  10. Its Alive!! First Diy Amp Works!!
  11. Duncan Munro Psud primer please?
  12. Preamp volume control??
  13. Welborne 300b DRD plate current
  14. Active compensation...
  15. Calculating expected output power.
  16. Hybrid X line amp
  17. any way to fix a end cap on a 807 power tube
  18. power tube question
  19. MJ head-amp- how does it sound?
  20. Quick Aikido question
  21. What kind of amp?
  22. Problem with cathode resistor
  23. 2A3 DRD schematic wanted
  24. reduce before amplifying?
  25. 6AS7-G RCA application considerations
  26. Matisse Fantasy waveform output test
  27. El84/6bq5/ecc83 + Ef86 = Dc Pp
  28. Searching for simple circuit
  29. McIntosh MC60 Screens
  30. Improve this Pilot 240 (EL84/6BQ5)
  31. Eimac 35TG
  32. power supply issues
  33. Which Amperex ECC88 is the best?
  34. laney PA amp questions
  35. Grid battery bias on phono....
  36. EL34 identification
  37. UL vs SE
  38. 6sn7 operating points
  39. HELP! B+ voltage problem/burning power resistor
  40. are these tubes any good ?????
  41. Free Lunch/Monkey/DRD inspired 2A3
  42. E280F Triode mode operating point
  43. EL84 Guitar amp questions (long, sorry)
  44. 2nd Aikido PCB and PSU groupbuy
  45. Newbie question...
  46. Help in getting more gain out of 300B SE
  47. ECC808 what to do
  48. Microphonics When Hot, Raytheon CK5842
  49. MOSCODE hybrid DIY
  50. transformer question
  51. help, my amp humz
  52. Le tube preamp
  53. Ideal operating point of 6sj7
  54. Anyone tried the Hammond 1642SE in a BIG SE amp?
  55. MOSFET current source as triode load
  56. C-core transformers
  57. choke and choke
  58. High Voltage Power Supply Caps
  59. suggestions for 300B tubes
  60. Differential input stage
  61. rca conversion
  62. heating
  63. Russian 6N8S/1578
  64. DIY tube amp squeals when turned up
  65. ECL80-Amp from Andreas Kirschner
  66. HSS preamp, anyone care to comment
  67. help me design an input stage for 6b4G PP
  68. Instrument/Microphone Tube Pre-amp
  69. first-time tube DIY project...phono preamp
  70. A question regarding schematics
  71. My first creation
  72. Your opinion on this VCCS heater supply please.
  73. Looking for ORIGINAL GE 6L6GC
  74. Need help - O/T trannies for future project
  75. ECL82 (6BM8) PP Stereo
  76. first DIY amp start up-yowza HELP!
  77. Ronette Info
  78. GE 5687 (5 stars)
  79. vox ac4
  80. Help: Toroid choke for a preamp
  81. Who makes a 1962 Bassman head chassis?
  82. does meter degrade sound ?
  83. Eye Tube (1629) controller help
  84. Scott 99B & 99C Public Auction Find
  85. tube id book
  86. radio , tv station and radar stations still use the best single end class a amplifier
  87. Stupid question?
  88. looking for ideas on a small tube amp stand?
  89. Cascode gain stage info?????
  90. hi gain preamp
  91. Tube flashing
  92. Bogen tube amp with variable Damping Factor
  93. Question re Allen Wright PP-1cs
  94. What is a good Tube tester to get?
  95. High Gain Preamp
  96. SACThailand
  97. You know you're a tube junky when...
  98. 6AU6 to do EF86 duty?
  99. 6Н28Б-В datasheet?
  100. Is single ended Class A better than push-pull?
  101. Is 845 better than 211 tube amplifier?
  102. Cool Fireworks (tubes are tough!)
  103. Big Big hum ???
  104. 5687 filament heater question
  105. Anyone know agood MOSFET drive for RCA 811A Tube?
  106. Who is into musical instrument tube amplification?
  107. buffer stage ECC88 or ECC83?
  108. EL34 Integrated
  109. Solid state HT regulator??
  110. Tubes driving dipole mids
  111. How do I turn an high current signal into a line level signal??
  112. Peer review, UL question
  113. Grundig TK60 - Where is the Line Out ?
  114. 12AX7, EL34 or 6L6 design wanted
  115. RCA to Speakers?
  116. Morgan Jones - Valve books
  117. Any one tried to use subminiature for input tubes?
  118. Tube data for current manufacturers?
  119. Pentode to Triode Switch
  120. fried Heatkit IP-17 power supply
  121. Suggestions for Tube Amplifier
  122. SMPS for 300B heater ?
  123. What does this mean?
  124. heater/cathode query
  125. Bottlehead S.E.X Amp
  126. Old Meets New
  127. 6336-SE modification
  128. 6as7 pre-amp questions.
  129. Help in calculating NFB loop.
  130. ECL86 - quick and dirty
  131. Help! Q? about Ohm load in '59 Bassman RI
  132. preamp tubes change
  133. Parallel PP ECL86
  134. Anyone build a Minimal Reactance PSU?
  135. Transformer hook-up question to 115V AC line
  136. Langevin Schematic Archive
  137. PPP EL84 Amp
  138. Interesting comparison between NOS RCA 12ax7, Chinese 12ax7a
  139. Aikido: Width control
  140. Shielded Input Wire
  141. choke
  142. Multiple Inputs in One Shielded Cable?
  143. Presence control on a SE ?
  144. Question : pentode ccs schematic ?
  145. right capacitor value?
  146. Anybody knows this tube--WE 430C
  147. Transformer substitution help
  148. CFB Issues
  149. Please Suggest: Old Tube Usages
  150. Very powerful push/pull circuit
  151. Project choice for KT88
  152. Tamura F-475 in Parafeed?
  153. Kofi Annan in: "Push and Pull with Me"
  154. Schmitt dephaser
  155. Anyone using Chelmer Valves?
  156. SET w/ 300B Ultrapath + Parafeed Typologies
  157. a question about local feedback
  158. about input transformer
  159. Power transformer selection madness
  160. EF91 Line Stage questions
  161. Sourcing parts for Dynaco PAS rebuild
  162. HH Scott 223 monoblock schematics
  163. info needed on the 7c6 tube
  164. A final question on grounding(yeah right!)
  165. Schematics and Manuals Site Found
  166. Sprague/Cap Color Codes ?
  167. saba console radio working?
  168. Feedback and mu-followers
  169. Hundreds of 6AL5s
  170. Orange/Red Spot on The Anode of Sovtek 6L6GC
  171. Best way to isolate non-isolated RCAs?
  172. Power Resistor Smoking on HF-81
  173. Audio Innovations L-2
  174. first tube project
  175. And now a question about power switch...
  176. 2E24 ultralinear
  177. tube pin numbers
  178. Will This possibly work?
  179. What is the right current for a 300B at 400V and -80V grid bias?
  180. Simple Cap-Coupled CF Advise Needed
  181. tube amp layout reality check
  182. plitron
  183. How long does a 7199 last?
  184. Modding Tube Mixer Into DAW Front End
  185. CAE Cascode Diffamp Front End
  186. recommended resistor wattage
  187. 6.3V Rectifier Tube Lit by 5V
  188. Precision Electronics Amp w/ 6GT5's, Convert to 6L6's?
  189. WE121A, Please critique me
  190. Grommes / Western Electric G5M Tube Mixer Mods
  191. schemes needed
  192. PP to PPP
  193. aikido voltage swing
  194. voltage drop across a CCS...
  195. bogen db20 Schematic
  196. Mullards branded as Telefunkens???
  197. Pentodes; plate resistance; damping...
  198. PP amp has become SE?
  199. anyone mod a NYAL Moscode superIt?
  200. update to phillips sepp otl?
  201. DC filament supply LC or CL
  202. No Bass Control
  203. Unison Research Simply2 or s2schematics
  204. Border Patrol Power Supply
  205. Any leads on repairing a vintage Alamo Capri tube amp? >>
  206. nanocrystalline amorphous OPT
  207. El84 Pp
  208. Preamp, Euridice?
  209. Has anyone built a PS like this?
  210. Tube sockets in Eagle?
  211. E235L tubes
  212. Grid Input Transformers
  213. Aikido Power Supply
  214. ralph power pp amp with 807 ?
  215. fender clone, 6SJ7 vs. 6SN7
  216. tube stores in moscow
  217. 211 and 845
  218. Need help with amp
  219. Altec 1570B
  220. UL to triode
  221. How can I improve this tube amp (see pics)?
  222. klimo merlin preamp sch wanted
  223. CCS question
  224. *****es brew step 2 ... or grid bias ... how to?
  225. Filaments for the Aikido
  226. RE: RC-19 or RC-30
  227. My experience building a DRD d3A/300B amp
  228. TIP50 + LM317 High Voltage Regulator
  229. Any info on old "Cosmos" amp'?
  230. What more do I need to know?
  231. EBAY Find Of The Year Club LOL
  232. Partial feedback DHP SE amp
  233. newbie question
  234. Tube 1616
  235. Class A tube integrated circuit request
  236. Global Feedback Source Point
  237. These look interesting for that SE project
  238. Phillips AG9008 amp - looking for diagram
  239. 3cx3000
  240. EL86 and speakers? 800 Ohm
  241. Looking for CAT SL-1 Schematic
  242. el84 - 807 ?
  243. Low-voltage Tubebuffer by David Lin
  244. changing diodes with 5AR4 tubes
  245. 801 amp PS
  246. what can I do with these tubes?
  247. How to 'fine tune' your amps?
  248. Otl
  249. Rogers E40a schematic?
  250. Peavey Triple X Rewire! Help!

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