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  1. Amplifer calculation
  2. Auto Bias?
  3. Se KT88 with Quad ESL
  4. Parts from Salvage
  5. power supply question.... too many Volts?
  6. Heathkit A7E Conversion to Guitar
  7. Now wouldn’t this make an awesome monoblock.
  8. Please,help me for schematics!!
  9. Kofi Annan in: "Open for Suggestion"
  10. What connector for 300vDC DOMESTIC environment?
  11. looking for help in transformers.
  12. problems with 805 tubes
  13. Audio Research D-90
  14. Replacing a 12AU7 in a cathode-follower.
  15. Original Dynaco 70 circuit mods/upgrades?
  16. is there a power supply unit for prototyping?
  17. Power Supply Design and Blocking
  18. OTL questions
  19. PP- which input/splitter topology??
  20. Cathode feedback and DHTs
  21. How should Dick Olsher Blue Velvet measure??
  22. Info on Melos MA-111?
  23. Aikido with dual personality
  24. Making a hole for AC socket in a chassis
  25. Liteaudio LS31 preamp pcb
  26. Thoughts on Quad II output topology
  27. HF-85 Rebuild advice
  28. Cheap Williamson amp kit
  29. Mr'Liang audio amplifiers
  30. plate ccs
  31. DC Huuuummmmmm
  32. Hey Gingertube - trying to debug Baby Huey
  33. question about nOrh SE 9 amp for FE207E
  34. 6N1P or EF86 for bass guitar preamp?
  35. Arc D150
  36. help identify this "cleartop 6550"
  37. Cheap emergency gold sockets
  38. Is Western Electric for Real? KT88 Scam?
  39. Russian 635P?
  40. Swinging Choke or Smoothing Choke
  41. Amp de-bugging
  42. SMPS for B+ from PC PS
  43. Placement of tone stacks
  44. Rectify AC to DC for heating
  45. KT88 in class B
  46. 6FE5 Ultralinear?
  47. OPT -the good, the bad or the ugly ??
  48. Switching power supply for tube-pre
  49. Using a zener to drop plate+screen voltages
  50. Will this circuit work?
  51. Ei 6CW5, any users?
  52. Simple tube preamp?
  53. push-pull and primary impedance
  54. DIY : SWR Interstellar OverDrive (bass preamp)
  55. sound valves m-40 schematics
  56. series connection of filament in push pull output stage
  57. Has anybody built this amp?
  58. Red Light District Amp Screen Reg
  59. AEG rectifier
  60. Gm emulator for calibration
  61. Greetings and a couple of questions
  62. Tubes in a chip amp power stage??
  63. Yaqin MC-10L Preamp Tubes
  64. Sound of paralleld EL84
  65. Preamp Question
  66. WTH -- UL back to triode connection
  67. $139 tube amp but cant remember where i saw it...
  68. better 6au6 alternative
  69. type 40 triode curves
  70. Cap size for Hg Rectifiers
  71. Anybody have experience building an OTL amp?
  72. measuring hum
  73. Nytone SA2000
  74. Inter stage iron in High End
  75. very peculiar psu problem
  76. 12A6 Healthkit A7 Amp
  77. testing a 13E1
  78. JE Labs / Arnold Cruz 2A3 amp - Q
  79. 5842 grounded grid
  80. Russian RF Double Tetrodes
  81. Opinions or inputs on Altec 1570B amplifiers
  82. Chinese EL34 amp to modify
  83. GE 97F cap polarity ???
  84. 6C8G phase inverter
  85. Shall I disassemble this ampex for parts?
  86. Power Amp Build from Eico ST70 - Negative Feedback Question
  87. ECC83 cathode grounded = awesome overdrive (?!?!?)
  88. Looking for a Balanced Mic Preamp w 12AX7
  89. Does anyone has a T.A.C.-34 or a T.A.C.-88 schematic?
  90. Conrad Johnson PV10L Phono stage DIY
  91. NEW KT66's
  92. Edcor outputs?
  93. Schematic Comment on 'Principles of Power" book ??
  94. what kind of resistor is this?
  95. stereo push pull amp one heater supply for power tubes
  96. Building new GU-50 stereo amp...
  97. Tubes and microphonics
  98. 829 or GU-29 audio amplifier schematics?
  99. Electrolytic types...
  100. Consonance t99 schematic/ minimax pre
  101. Useful Supplier of Transformers, Chokes, Chassis and other stuff
  102. Serious case of brain fry. You out there Thorsten?
  103. Upgrading a Beard P100 tubeamp
  104. Tube Amplifier with OT100
  105. bogen m120 schematic
  106. Question about Thorsten's Tube Phono Pre
  107. PP Output Trafo Measurement
  108. push pull balancing
  109. New issue Mullard Tubes
  110. Help on triode
  111. 5 Volt Damper Diodes?
  112. Please help diagnose preamp problem
  113. 6N1/6N3 substitution
  114. Cathode feedback and input impedance
  115. Optimal ripple voltage on b+ supply
  116. Setup suggestion between DAC-AH and ST-70
  117. Simple Low Voltage Tube Preamp?
  118. Anyone built this 100W GEC amp? How is the sound?
  119. Does anyone have VT150 schematic?
  120. Ignition Coil Toobe Amplifier
  121. Voltage swing of Heffa?
  122. All pentode PP amp?
  123. GZ34 anode load resistor calculation - help?
  124. Capacitor choice for attached schematic
  125. The sound of... tubes !
  126. All quiet on the SN front - recommended choice of tubes
  127. Moscode 600 hum/turn off thump
  128. Tube Tester Resto Basics
  129. Marshall 100v 8100U Guitar Amp Hums
  130. What's the simple killer tube amp? Anyone?
  131. Help - CFB in a KT88 SE amp
  132. Any Russian speakers here?
  133. 6av6 Diode use?
  134. Power Supply
  135. Choke rating for choke input duty
  136. drawing a loadline for a power stage EL34 tube.
  137. Experiencing problems to insert tubes
  138. Preamp signal wiring ideas ?
  139. el34PP circuit evaluation!!
  140. "Re-Forming" Caps on Old Tube Amp
  141. Gary Pimm website?
  142. Haltron (UK), Trigon (UK) and Ultron (germany) ECC83 tubes info request.
  143. Audio Research D150 bias setting
  144. Cathodyne phase splitter with CCS?
  145. Has anyone tried 2 x 6550 100W amp?
  146. modelling PSU for Aikido
  147. 27 head phone amp or.??
  148. New Chassis Fabrication Pics and Capacitor Question
  149. Replacing old caps in the SP8 pre-amp
  150. Tube choice for Class A2
  151. hybrid graetz in PSUDII
  152. 6C45P Spud
  153. Philips ECG 12AX7WA or GE 5751 ?? Opinions, please.
  154. Single Ended EL34 Amp
  155. Rp / Rk on Aikido preamp
  156. hum in amp!
  157. Looking for a 83 rectifier model
  158. Advice wanted on ebay SET amps
  159. Resistors for ultralinear-to-triode conversion
  160. Gary Pimm
  161. resistor values for lifting ground AND LED
  162. output transformer impedance choices
  163. Feedback disc recording amp
  164. 6bm8/ECL82 vs EL84
  165. B+ filter caps
  166. (Newbie) CSS Question
  167. 6P15P Tubes: Push Pull Possible?
  168. Tube X-ref list ??
  169. AVO tube tester spares
  170. Add gain before or after the phase splitter?
  171. ping SY: Red Light LED question
  172. Greinacher voltage multiplier
  173. Dead channel
  174. Euphonia is back!
  175. What's the best 417A & 437A?
  176. Eico ST70 OPT / Schematic Question
  177. Is this feasible?
  178. Repairing 805 tubes
  179. jadis defy 7 help
  180. 6n1p Screen
  181. Mc275ce
  182. Are these tubes are the same?
  183. "King of tube(s) for line-stages"
  184. Acoustic Plan PhonoMaster
  185. Heathkit AA-81 schematic
  186. has anyone kept a copy of gpimm's latest self-biasing CCS?
  187. How to wire inductor - s and n
  188. Rogers Cadet III schematics Corrections
  189. Hickok TV-7/U restoration advice needed.
  190. Rogers Cadet III to SY's Red Light District or Gingertubes's Baby Huey
  191. 24v Aikido for newb.
  192. Powering Up Old Tube Amps/Receivers
  193. preliminary schematic drawing rev.1a
  194. Not a typical MKIII Dynaco.
  195. mosfet buffer for power stage
  196. 304TL based Class A
  197. EI KT-90 news
  198. Purchasing NOS Tubes
  199. tube power supply design resources
  200. High Voltage Regulator Design
  201. max. output for two 5881 tubes?
  202. Excessive current draw in Fender Deville
  203. driving your power stage
  204. Need schematic Cary Audio SLP-70 preamp
  205. Bridge-balanced amplifiers
  206. Tell-tale signs of good feedback usage?
  207. Any mid priced SE transformers around?
  208. Bias resistor
  209. Some sneek peeks
  210. Old radio with 4 pin sockets, info?
  211. need help on pot tapers
  212. A typical KT88 tubes
  213. amplifier for unknown output transformers?
  214. vista audio
  215. CV4014 and 5650 - any audio application of these tubes?
  216. SVP-PRO schematic
  217. Looking for a good source for attenuators
  218. Center-tap to ground?
  219. 6n1p-ev operating points
  220. where to find old pot's with switch built in
  221. Maggie refurb project
  222. Parafeed output
  223. Hirtel junior stereo italian tube amp
  224. power supply help
  225. 7189/7189A Problem
  226. Glow modulation tubes
  227. Transformer Hum leaks to Speakers
  228. EAR Yoshino V20 Amplifier
  229. Repair a tube tester?
  230. starting PP - 6p3s
  231. 6BL7 rA in PP
  232. Why such high plate voltage in 2A3 DRD?
  233. to parafeed or not to parafeed that is the question
  234. Lowering voltage output of transformer
  235. Using EL34 in a line stage
  236. peerless transfomer information
  237. Output transformer design for SS amp
  238. CD source fortube amp
  239. What's the SIMPLEST 50W or higher Amp Schematic but best sound you've heard ?
  240. BIG tube amplifier, two qbl5/3500 tubes
  241. EL34 or 6L6 mono help me please!!
  242. Why don't we use output tubes as cathode followers?
  243. 6C33 driver recommendations
  244. 100watt power, fixed gain far cleaner than Marshall amp any sugestion
  245. Minimum Zener Current with Pass Device
  246. Favorite easy 6V6 push-pull circuit?
  247. Tubecad soft-clipping circuit
  248. broskie voltage regulator
  249. E88CC dissipation in Aikido
  250. Magnavox 6BQ5/EL84 and Mr. Gabe

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