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

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