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

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