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

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