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  1. Calling all Phono Preamp gurus, I'm looking for some plans
  2. Measuring Unknown Transformers
  3. Swinging choke vs std. choke in PS
  4. scope tests on a Heathkit A7E
  5. tube hum in a 6SN7 Aikido - is this weird?
  6. ECC807 preamp
  7. Ode to the 8416
  8. CCS 10M45 in Cathode of CF Driver
  9. Audionics help
  10. what 8-pin tubes would you suggest for an aikido preamp?
  11. KT88 tubes
  12. Any one tried these transformers?
  13. Williamson 6L6 Monoblocks (Finally)
  14. Master Volume preamp.. simple?
  15. ~2 watt SET decision
  16. retube order
  17. MC Riaa preamp help/opinions please
  18. WTB Fairchild 260 transformers
  19. Peter Millet amp
  20. 1946 Gibson BR-4 Amplifier tube question
  21. Power Regulator PCB's and Aikido parts
  22. A heater wiring DOH! moment??
  23. hum in fisher 800c phono section
  24. Aikido warm-up hum, resistor types, etc.
  25. Any of these tubes good for amps?
  26. Mini 98 El84 PP amplifier
  27. 1X6S33S=6X6S19P which one gives less impedance?
  28. schematic for 12.6 VDC heaters
  29. PP transformer for SE?? Help!
  30. 7-pin miniature tubes for audio?
  31. Tube Preamp as a Guitar Effect
  32. 6L6GT vs. EL34/6CA7 and WHY?
  33. Tube rectifier help
  34. Fender push pull amp... using one tube only.. is it dangerous?
  35. KT88 Lifetime estimation
  36. Adjustable distributed load discussion
  37. Thyratron voltage regulation
  38. switch-on, switch-off sequence for preamp/amp
  39. Found Meixing Amp schematic, sorta, would like some feedback
  40. Tube Voltage Regulator Flicker...
  41. Projects...How does one decide ?
  42. Best 6550's for the money....
  43. SMPS and tubes
  44. Looking for Eico 1030 manual/schematic
  45. 6AS7 OTL
  46. Gary Pimm's site down?
  47. 805 + 300b Amplifier Schematic
  48. Music Angel Amplifiers
  49. MM Phono stage (kit?) for tube newbie
  50. Russian tube dealer?
  51. STA1 + amp vs K-12M
  52. cheap ebay KT88 amp
  53. Tubes at low +B...
  54. Converting a yarland amp to drive headphones
  55. Starting a component system
  56. Really elementary question about caps.
  57. Tube newbie with Scott 299B
  58. 12AV7- 5965 Vs 12AY7
  59. PX25 tubes in a 300B Amp?
  60. help with a choke.
  61. 60Hz buzzing
  62. nuvistor bias with 18V ?
  63. ground bus for inputs on preamp - what's best?
  64. Voltage drop of various regulators in dc regulated power supply for preamp
  65. Does anyone recognise this tube amp?
  66. Entry level tube amp
  67. Anyone build/use 6BG6G?
  68. KT-77 Blues
  69. Dynaco Information MArk II Required
  70. tube test numbers - what do they mean?
  71. foolish notion, 12GN7 model?
  72. First-Timer Doubts: K-12 or Gainclone?
  73. Eico ST70 Rebuild / Upgrade
  74. More power in this
  75. Help modifiying schematic
  76. Simple Variable Tube Power Supply
  77. bias voltage vs bias current
  78. All the Bias options
  79. 6N6G looks like a great audio tube. . .
  80. Variable bias
  81. Tube amp on a budget
  82. tung sol
  83. How cool is tube deep cooling?
  84. Modified Fender Deluxe - Constant Current Phase Splitter
  85. 12B4 Equivalents?
  86. KT88 pp triode control grid resistor????
  87. Duncan Amps spice model docs...
  88. Hum in Legend amp
  89. Which do you prefer - EL84 UL PP or EL34 Triode PP - and why?
  90. Mullard high speed tester
  91. Joining two NCT transformers
  92. Stereo Driver PCB for PP Amp (EL34/KT88)?
  93. Tube Integrated Amp Kit Project
  94. 866A transient over-current capability?
  95. 6HS8 tubes for volume control
  96. cathode for plate ccs ?
  97. Broken Tube pin guides
  98. I need a 120v ct transformer... Where to look?
  99. Best production EL34?
  100. 6DJ8 or 12AT7
  101. 6L6 Single Ended Flea Amp?
  102. Se Tranny used on Parafeed!!!
  103. Hammond 270 series power transformer?
  104. 6aq5.......6v6.......
  105. 6N1 substitution with 6922
  106. driving 845 push-pull with a signal from a 300B SE stage
  107. Recommend a schematic for a Moving Coil head amp?
  108. Tube Buffer 6J1 / 5654 (6AK5)
  109. question about 6Av5ga tubes
  110. Toroidal SE transformers
  111. Calling MR. Tubelab! 6W6GT?
  112. Triode Trick
  113. SE 300B or PP KT88 amps?
  114. perhaps an INSANE query...
  115. Possible to estimate transformer specs?
  116. 9 pin replacement sockets
  117. Bench PSU
  118. Need help to make a correct 83 (merc.vapor.rect) SS replacement.
  119. Joke of the day
  120. $300 tube amp budget. Which Amp??
  121. Simple Linestage for 27 or 1H5?
  122. Foreplay III pre amp
  123. Fixing this 100TH
  124. I have some 5654
  125. Multisegment capacitor replacement help.
  126. Amplifer calculation
  127. Auto Bias?
  128. Se KT88 with Quad ESL
  129. Parts from Salvage
  130. power supply question.... too many Volts?
  131. Heathkit A7E Conversion to Guitar
  132. Now wouldn’t this make an awesome monoblock.
  133. Please,help me for schematics!!
  134. Kofi Annan in: "Open for Suggestion"
  135. What connector for 300vDC DOMESTIC environment?
  136. looking for help in transformers.
  137. problems with 805 tubes
  138. Audio Research D-90
  139. Replacing a 12AU7 in a cathode-follower.
  140. Original Dynaco 70 circuit mods/upgrades?
  141. is there a power supply unit for prototyping?
  142. Power Supply Design and Blocking
  143. OTL questions
  144. PP- which input/splitter topology??
  145. Cathode feedback and DHTs
  146. How should Dick Olsher Blue Velvet measure??
  147. Info on Melos MA-111?
  148. Aikido with dual personality
  149. Making a hole for AC socket in a chassis
  150. Liteaudio LS31 preamp pcb
  151. Thoughts on Quad II output topology
  152. HF-85 Rebuild advice
  153. Cheap Williamson amp kit
  154. Mr'Liang audio amplifiers
  155. plate ccs
  156. DC Huuuummmmmm
  157. Hey Gingertube - trying to debug Baby Huey
  158. question about nOrh SE 9 amp for FE207E
  159. 6N1P or EF86 for bass guitar preamp?
  160. Arc D150
  161. help identify this "cleartop 6550"
  162. Cheap emergency gold sockets
  163. Is Western Electric for Real? KT88 Scam?
  164. Russian 635P?
  165. Swinging Choke or Smoothing Choke
  166. Amp de-bugging
  167. SMPS for B+ from PC PS
  168. Placement of tone stacks
  169. Rectify AC to DC for heating
  170. KT88 in class B
  171. 6FE5 Ultralinear?
  172. OPT -the good, the bad or the ugly ??
  173. Switching power supply for tube-pre
  174. Using a zener to drop plate+screen voltages
  175. Will this circuit work?
  176. Ei 6CW5, any users?
  177. Simple tube preamp?
  178. push-pull and primary impedance
  179. DIY : SWR Interstellar OverDrive (bass preamp)
  180. sound valves m-40 schematics
  181. series connection of filament in push pull output stage
  182. Has anybody built this amp?
  183. Red Light District Amp Screen Reg
  184. AEG rectifier
  185. Gm emulator for calibration
  186. Greetings and a couple of questions
  187. Tubes in a chip amp power stage??
  188. Yaqin MC-10L Preamp Tubes
  189. Sound of paralleld EL84
  190. Preamp Question
  191. WTH -- UL back to triode connection
  192. $139 tube amp but cant remember where i saw it...
  193. better 6au6 alternative
  194. type 40 triode curves
  195. Cap size for Hg Rectifiers
  196. Anybody have experience building an OTL amp?
  197. measuring hum
  198. Nytone SA2000
  199. Inter stage iron in High End
  200. very peculiar psu problem
  201. 12A6 Healthkit A7 Amp
  202. testing a 13E1
  203. JE Labs / Arnold Cruz 2A3 amp - Q
  204. 5842 grounded grid
  205. Russian RF Double Tetrodes
  206. Opinions or inputs on Altec 1570B amplifiers
  207. Chinese EL34 amp to modify
  208. GE 97F cap polarity ???
  209. 6C8G phase inverter
  210. Shall I disassemble this ampex for parts?
  211. Power Amp Build from Eico ST70 - Negative Feedback Question
  212. ECC83 cathode grounded = awesome overdrive (?!?!?)
  213. Looking for a Balanced Mic Preamp w 12AX7
  214. Does anyone has a T.A.C.-34 or a T.A.C.-88 schematic?
  215. Conrad Johnson PV10L Phono stage DIY
  216. NEW KT66's
  217. Edcor outputs?
  218. Schematic Comment on 'Principles of Power" book ??
  219. what kind of resistor is this?
  220. stereo push pull amp one heater supply for power tubes
  221. Building new GU-50 stereo amp...
  222. Tubes and microphonics
  223. 829 or GU-29 audio amplifier schematics?
  224. Electrolytic types...
  225. Consonance t99 schematic/ minimax pre
  226. Useful Supplier of Transformers, Chokes, Chassis and other stuff
  227. Serious case of brain fry. You out there Thorsten?
  228. Upgrading a Beard P100 tubeamp
  229. Tube Amplifier with OT100
  230. bogen m120 schematic
  231. Question about Thorsten's Tube Phono Pre
  232. PP Output Trafo Measurement
  233. push pull balancing
  234. New issue Mullard Tubes
  235. Help on triode
  236. 5 Volt Damper Diodes?
  237. Please help diagnose preamp problem
  238. 6N1/6N3 substitution
  239. Cathode feedback and input impedance
  240. Optimal ripple voltage on b+ supply
  241. Setup suggestion between DAC-AH and ST-70
  242. Simple Low Voltage Tube Preamp?
  243. Anyone built this 100W GEC amp? How is the sound?
  244. Does anyone have VT150 schematic?
  245. Ignition Coil Toobe Amplifier
  246. Voltage swing of Heffa?
  247. All pentode PP amp?
  248. GZ34 anode load resistor calculation - help?
  249. Capacitor choice for attached schematic
  250. The sound of... tubes !

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