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  1. Tube newbie with Scott 299B
  2. 12AV7- 5965 Vs 12AY7
  3. PX25 tubes in a 300B Amp?
  4. help with a choke.
  5. 60Hz buzzing
  6. nuvistor bias with 18V ?
  7. ground bus for inputs on preamp - what's best?
  8. Voltage drop of various regulators in dc regulated power supply for preamp
  9. Does anyone recognise this tube amp?
  10. Entry level tube amp
  11. Anyone build/use 6BG6G?
  12. KT-77 Blues
  13. Dynaco Information MArk II Required
  14. tube test numbers - what do they mean?
  15. foolish notion, 12GN7 model?
  16. First-Timer Doubts: K-12 or Gainclone?
  17. Eico ST70 Rebuild / Upgrade
  18. More power in this
  19. Help modifiying schematic
  20. Simple Variable Tube Power Supply
  21. bias voltage vs bias current
  22. All the Bias options
  23. 6N6G looks like a great audio tube. . .
  24. Variable bias
  25. Tube amp on a budget
  26. tung sol
  27. How cool is tube deep cooling?
  28. Modified Fender Deluxe - Constant Current Phase Splitter
  29. 12B4 Equivalents?
  30. KT88 pp triode control grid resistor????
  31. Duncan Amps spice model docs...
  32. Hum in Legend amp
  33. Which do you prefer - EL84 UL PP or EL34 Triode PP - and why?
  34. Mullard high speed tester
  35. Joining two NCT transformers
  36. Stereo Driver PCB for PP Amp (EL34/KT88)?
  37. Tube Integrated Amp Kit Project
  38. 866A transient over-current capability?
  39. 6HS8 tubes for volume control
  40. cathode for plate ccs ?
  41. Broken Tube pin guides
  42. I need a 120v ct transformer... Where to look?
  43. Best production EL34?
  44. 6DJ8 or 12AT7
  45. 6L6 Single Ended Flea Amp?
  46. Se Tranny used on Parafeed!!!
  47. Hammond 270 series power transformer?
  48. 6aq5.......6v6.......
  49. 6N1 substitution with 6922
  50. driving 845 push-pull with a signal from a 300B SE stage
  51. Recommend a schematic for a Moving Coil head amp?
  52. Tube Buffer 6J1 / 5654 (6AK5)
  53. question about 6Av5ga tubes
  54. Toroidal SE transformers
  55. Calling MR. Tubelab! 6W6GT?
  56. Triode Trick
  57. SE 300B or PP KT88 amps?
  58. perhaps an INSANE query...
  59. Possible to estimate transformer specs?
  60. 9 pin replacement sockets
  61. Bench PSU
  62. Need help to make a correct 83 (merc.vapor.rect) SS replacement.
  63. Joke of the day
  64. $300 tube amp budget. Which Amp??
  65. Simple Linestage for 27 or 1H5?
  66. Foreplay III pre amp
  67. Fixing this 100TH
  68. I have some 5654
  69. Multisegment capacitor replacement help.
  70. Amplifer calculation
  71. Auto Bias?
  72. Se KT88 with Quad ESL
  73. Parts from Salvage
  74. power supply question.... too many Volts?
  75. Heathkit A7E Conversion to Guitar
  76. Now wouldn’t this make an awesome monoblock.
  77. Please,help me for schematics!!
  78. Kofi Annan in: "Open for Suggestion"
  79. What connector for 300vDC DOMESTIC environment?
  80. looking for help in transformers.
  81. problems with 805 tubes
  82. Audio Research D-90
  83. Replacing a 12AU7 in a cathode-follower.
  84. Original Dynaco 70 circuit mods/upgrades?
  85. is there a power supply unit for prototyping?
  86. Power Supply Design and Blocking
  87. OTL questions
  88. PP- which input/splitter topology??
  89. Cathode feedback and DHTs
  90. How should Dick Olsher Blue Velvet measure??
  91. Info on Melos MA-111?
  92. Aikido with dual personality
  93. Making a hole for AC socket in a chassis
  94. Liteaudio LS31 preamp pcb
  95. Thoughts on Quad II output topology
  96. HF-85 Rebuild advice
  97. Cheap Williamson amp kit
  98. Mr'Liang audio amplifiers
  99. plate ccs
  100. DC Huuuummmmmm
  101. Hey Gingertube - trying to debug Baby Huey
  102. question about nOrh SE 9 amp for FE207E
  103. 6N1P or EF86 for bass guitar preamp?
  104. Arc D150
  105. help identify this "cleartop 6550"
  106. Cheap emergency gold sockets
  107. Is Western Electric for Real? KT88 Scam?
  108. Russian 635P?
  109. Swinging Choke or Smoothing Choke
  110. Amp de-bugging
  111. SMPS for B+ from PC PS
  112. Placement of tone stacks
  113. Rectify AC to DC for heating
  114. KT88 in class B
  115. 6FE5 Ultralinear?
  116. OPT -the good, the bad or the ugly ??
  117. Switching power supply for tube-pre
  118. Using a zener to drop plate+screen voltages
  119. Will this circuit work?
  120. Ei 6CW5, any users?
  121. Simple tube preamp?
  122. push-pull and primary impedance
  123. DIY : SWR Interstellar OverDrive (bass preamp)
  124. sound valves m-40 schematics
  125. series connection of filament in push pull output stage
  126. Has anybody built this amp?
  127. Red Light District Amp Screen Reg
  128. AEG rectifier
  129. Gm emulator for calibration
  130. Greetings and a couple of questions
  131. Tubes in a chip amp power stage??
  132. Yaqin MC-10L Preamp Tubes
  133. Sound of paralleld EL84
  134. Preamp Question
  135. WTH -- UL back to triode connection
  136. $139 tube amp but cant remember where i saw it...
  137. better 6au6 alternative
  138. type 40 triode curves
  139. Cap size for Hg Rectifiers
  140. Anybody have experience building an OTL amp?
  141. measuring hum
  142. Nytone SA2000
  143. Inter stage iron in High End
  144. very peculiar psu problem
  145. 12A6 Healthkit A7 Amp
  146. testing a 13E1
  147. JE Labs / Arnold Cruz 2A3 amp - Q
  148. 5842 grounded grid
  149. Russian RF Double Tetrodes
  150. Opinions or inputs on Altec 1570B amplifiers
  151. Chinese EL34 amp to modify
  152. GE 97F cap polarity ???
  153. 6C8G phase inverter
  154. Shall I disassemble this ampex for parts?
  155. Power Amp Build from Eico ST70 - Negative Feedback Question
  156. ECC83 cathode grounded = awesome overdrive (?!?!?)
  157. Looking for a Balanced Mic Preamp w 12AX7
  158. Does anyone has a T.A.C.-34 or a T.A.C.-88 schematic?
  159. Conrad Johnson PV10L Phono stage DIY
  160. NEW KT66's
  161. Edcor outputs?
  162. Schematic Comment on 'Principles of Power" book ??
  163. what kind of resistor is this?
  164. stereo push pull amp one heater supply for power tubes
  165. Building new GU-50 stereo amp...
  166. Tubes and microphonics
  167. 829 or GU-29 audio amplifier schematics?
  168. Electrolytic types...
  169. Consonance t99 schematic/ minimax pre
  170. Useful Supplier of Transformers, Chokes, Chassis and other stuff
  171. Serious case of brain fry. You out there Thorsten?
  172. Upgrading a Beard P100 tubeamp
  173. Tube Amplifier with OT100
  174. bogen m120 schematic
  175. Question about Thorsten's Tube Phono Pre
  176. PP Output Trafo Measurement
  177. push pull balancing
  178. New issue Mullard Tubes
  179. Help on triode
  180. 5 Volt Damper Diodes?
  181. Please help diagnose preamp problem
  182. 6N1/6N3 substitution
  183. Cathode feedback and input impedance
  184. Optimal ripple voltage on b+ supply
  185. Setup suggestion between DAC-AH and ST-70
  186. Simple Low Voltage Tube Preamp?
  187. Anyone built this 100W GEC amp? How is the sound?
  188. Does anyone have VT150 schematic?
  189. Ignition Coil Toobe Amplifier
  190. Voltage swing of Heffa?
  191. All pentode PP amp?
  192. GZ34 anode load resistor calculation - help?
  193. Capacitor choice for attached schematic
  194. The sound of... tubes !
  195. All quiet on the SN front - recommended choice of tubes
  196. Moscode 600 hum/turn off thump
  197. Tube Tester Resto Basics
  198. Marshall 100v 8100U Guitar Amp Hums
  199. What's the simple killer tube amp? Anyone?
  200. Help - CFB in a KT88 SE amp
  201. Any Russian speakers here?
  202. 6av6 Diode use?
  203. Power Supply
  204. Choke rating for choke input duty
  205. drawing a loadline for a power stage EL34 tube.
  206. Experiencing problems to insert tubes
  207. Preamp signal wiring ideas ?
  208. el34PP circuit evaluation!!
  209. "Re-Forming" Caps on Old Tube Amp
  210. Gary Pimm website?
  211. Haltron (UK), Trigon (UK) and Ultron (germany) ECC83 tubes info request.
  212. Audio Research D150 bias setting
  213. Cathodyne phase splitter with CCS?
  214. Has anyone tried 2 x 6550 100W amp?
  215. modelling PSU for Aikido
  216. 27 head phone amp or.??
  217. New Chassis Fabrication Pics and Capacitor Question
  218. Replacing old caps in the SP8 pre-amp
  219. Tube choice for Class A2
  220. hybrid graetz in PSUDII
  221. 6C45P Spud
  222. Philips ECG 12AX7WA or GE 5751 ?? Opinions, please.
  223. Single Ended EL34 Amp
  224. Rp / Rk on Aikido preamp
  225. hum in amp!
  226. Looking for a 83 rectifier model
  227. Advice wanted on ebay SET amps
  228. Resistors for ultralinear-to-triode conversion
  229. Gary Pimm
  230. resistor values for lifting ground AND LED
  231. output transformer impedance choices
  232. Feedback disc recording amp
  233. 6bm8/ECL82 vs EL84
  234. B+ filter caps
  235. (Newbie) CSS Question
  236. 6P15P Tubes: Push Pull Possible?
  237. Tube X-ref list ??
  238. AVO tube tester spares
  239. Add gain before or after the phase splitter?
  240. ping SY: Red Light LED question
  241. Greinacher voltage multiplier
  242. Dead channel
  243. Euphonia is back!
  244. What's the best 417A & 437A?
  245. Eico ST70 OPT / Schematic Question
  246. Is this feasible?
  247. Repairing 805 tubes
  248. jadis defy 7 help
  249. 6n1p Screen
  250. Mc275ce

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