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  1. Foreplay III pre amp
  2. Fixing this 100TH
  3. I have some 5654
  4. Amplifer calculation
  5. Auto Bias?
  6. Se KT88 with Quad ESL
  7. Parts from Salvage
  8. power supply question.... too many Volts?
  9. Now wouldn’t this make an awesome monoblock.
  10. Please,help me for schematics!!
  11. Kofi Annan in: "Open for Suggestion"
  12. What connector for 300vDC DOMESTIC environment?
  13. looking for help in transformers.
  14. problems with 805 tubes
  15. Audio Research D-90
  16. Replacing a 12AU7 in a cathode-follower.
  17. Original Dynaco 70 circuit mods/upgrades?
  18. is there a power supply unit for prototyping?
  19. Power Supply Design and Blocking
  20. OTL questions
  21. PP- which input/splitter topology??
  22. Cathode feedback and DHTs
  23. How should Dick Olsher Blue Velvet measure??
  24. Info on Melos MA-111?
  25. Aikido with dual personality
  26. Making a hole for AC socket in a chassis
  27. Liteaudio LS31 preamp pcb
  28. Thoughts on Quad II output topology
  29. HF-85 Rebuild advice
  30. Cheap Williamson amp kit
  31. Mr. Liang audio amplifiers
  32. plate ccs
  33. DC Huuuummmmmm
  34. Hey Gingertube - trying to debug Baby Huey
  35. question about nOrh SE 9 amp for FE207E
  36. Arc D150
  37. help identify this "cleartop 6550"
  38. Cheap emergency gold sockets
  39. Is Western Electric for Real? KT88 Scam?
  40. Russian 635P?
  41. Swinging Choke or Smoothing Choke
  42. Amp de-bugging
  43. SMPS for B+ from PC PS
  44. Placement of tone stacks
  45. Rectify AC to DC for heating
  46. KT88 in class B
  47. 6FE5 Ultralinear?
  48. OPT -the good, the bad or the ugly ??
  49. Switching power supply for tube-pre
  50. Using a zener to drop plate+screen voltages
  51. Will this circuit work?
  52. Ei 6CW5, any users?
  53. Simple tube preamp?
  54. push-pull and primary impedance
  55. DIY : SWR Interstellar OverDrive (bass preamp)
  56. sound valves m-40 schematics
  57. series connection of filament in push pull output stage
  58. Has anybody built this amp?
  59. Red Light District Amp Screen Reg
  60. AEG rectifier
  61. Gm emulator for calibration
  62. Greetings and a couple of questions
  63. Tubes in a chip amp power stage??
  64. Yaqin MC-10L Preamp Tubes
  65. Sound of paralleld EL84
  66. Preamp Question
  67. WTH -- UL back to triode connection
  68. $139 tube amp but cant remember where i saw it...
  69. better 6au6 alternative
  70. type 40 triode curves
  71. Cap size for Hg Rectifiers
  72. Anybody have experience building an OTL amp?
  73. measuring hum
  74. Nytone SA2000
  75. Inter stage iron in High End
  76. very peculiar psu problem
  77. 12A6 Healthkit A7 Amp
  78. testing a 13E1
  79. JE Labs / Arnold Cruz 2A3 amp - Q
  80. 5842 grounded grid
  81. Russian RF Double Tetrodes
  82. Opinions or inputs on Altec 1570B amplifiers
  83. Chinese EL34 amp to modify
  84. GE 97F cap polarity ???
  85. 6C8G phase inverter
  86. Shall I disassemble this ampex for parts?
  87. Power Amp Build from Eico ST70 - Negative Feedback Question
  88. ECC83 cathode grounded = awesome overdrive (?!?!?)
  89. Looking for a Balanced Mic Preamp w 12AX7
  90. Does anyone has a T.A.C.-34 or a T.A.C.-88 schematic?
  91. Conrad Johnson PV10L Phono stage DIY
  92. NEW KT66's
  93. Edcor outputs?
  94. Schematic Comment on 'Principles of Power" book ??
  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. Consonance t99 schematic/ minimax pre
  100. Useful Supplier of Transformers, Chokes, Chassis and other stuff
  101. Serious case of brain fry. You out there Thorsten?
  102. Upgrading a Beard P100 tubeamp
  103. Tube Amplifier with OT100
  104. bogen m120 schematic
  105. Question about Thorsten's Tube Phono Pre
  106. PP Output Trafo Measurement
  107. push pull balancing
  108. New issue Mullard Tubes
  109. Help on triode
  110. 5 Volt Damper Diodes?
  111. Please help diagnose preamp problem
  112. 6N1/6N3 substitution
  113. Cathode feedback and input impedance
  114. Optimal ripple voltage on b+ supply
  115. Setup suggestion between DAC-AH and ST-70
  116. Simple Low Voltage Tube Preamp?
  117. Anyone built this 100W GEC amp? How is the sound?
  118. Does anyone have VT150 schematic?
  119. Ignition Coil Toobe Amplifier
  120. Voltage swing of Heffa?
  121. All pentode PP amp?
  122. GZ34 anode load resistor calculation - help?
  123. Capacitor choice for attached schematic
  124. The sound of... tubes !
  125. All quiet on the SN front - recommended choice of tubes
  126. Moscode 600 hum/turn off thump
  127. What's the simple killer tube amp? Anyone?
  128. Help - CFB in a KT88 SE amp
  129. Any Russian speakers here?
  130. 6av6 Diode use?
  131. Power Supply
  132. Choke rating for choke input duty
  133. drawing a loadline for a power stage EL34 tube.
  134. Experiencing problems to insert tubes
  135. Preamp signal wiring ideas ?
  136. el34PP circuit evaluation!!
  137. "Re-Forming" Caps on Old Tube Amp
  138. Gary Pimm website?
  139. Haltron (UK), Trigon (UK) and Ultron (germany) ECC83 tubes info request.
  140. Audio Research D150 bias setting
  141. Cathodyne phase splitter with CCS?
  142. Has anyone tried 2 x 6550 100W amp?
  143. modelling PSU for Aikido
  144. 27 head phone amp or.??
  145. New Chassis Fabrication Pics and Capacitor Question
  146. Replacing old caps in the SP8 pre-amp
  147. Tube choice for Class A2
  148. hybrid graetz in PSUDII
  149. 6C45P Spud
  150. Philips ECG 12AX7WA or GE 5751 ?? Opinions, please.
  151. Single Ended EL34 Amp
  152. Rp / Rk on Aikido preamp
  153. hum in amp!
  154. Looking for a 83 rectifier model
  155. Advice wanted on ebay SET amps
  156. Resistors for ultralinear-to-triode conversion
  157. Gary Pimm
  158. resistor values for lifting ground AND LED
  159. output transformer impedance choices
  160. Feedback disc recording amp
  161. 6bm8/ECL82 vs EL84
  162. B+ filter caps
  163. (Newbie) CSS Question
  164. 6P15P Tubes: Push Pull Possible?
  165. Tube X-ref list ??
  166. Add gain before or after the phase splitter?
  167. ping SY: Red Light LED question
  168. Greinacher voltage multiplier
  169. Dead channel
  170. Euphonia is back!
  171. What's the best 417A & 437A?
  172. Eico ST70 OPT / Schematic Question
  173. Is this feasible?
  174. Repairing 805 tubes
  175. jadis defy 7 help
  176. 6n1p Screen
  177. Mc275ce
  178. Are these tubes are the same?
  179. "King of tube(s) for line-stages"
  180. Acoustic Plan PhonoMaster
  181. Heathkit AA-81 schematic
  182. has anyone kept a copy of gpimm's latest self-biasing CCS?
  183. How to wire inductor - s and n
  184. Rogers Cadet III schematics Corrections
  185. Rogers Cadet III to SY's Red Light District or Gingertubes's Baby Huey
  186. 24v Aikido for newb.
  187. Powering Up Old Tube Amps/Receivers
  188. preliminary schematic drawing rev.1a
  189. Not a typical MKIII Dynaco.
  190. mosfet buffer for power stage
  191. EI KT-90 news
  192. 304TL based Class A
  193. Purchasing NOS Tubes
  194. tube power supply design resources
  195. High Voltage Regulator Design
  196. max. output for two 5881 tubes?
  197. driving your power stage
  198. Need schematic Cary Audio SLP-70 preamp
  199. Bridge-balanced amplifiers
  200. Tell-tale signs of good feedback usage?
  201. Any mid priced SE transformers around?
  202. Bias resistor
  203. Some sneek peeks
  204. Old radio with 4 pin sockets, info?
  205. need help on pot tapers
  206. A typical KT88 tubes
  207. amplifier for unknown output transformers?
  208. vista audio
  209. CV4014 and 5650 - any audio application of these tubes?
  210. SVP-PRO schematic
  211. Looking for a good source for attenuators
  212. Center-tap to ground?
  213. 6n1p-ev operating points
  214. where to find old pot's with switch built in
  215. Maggie refurb project
  216. Parafeed output
  217. Hirtel junior stereo italian tube amp
  218. power supply help
  219. 7189/7189A Problem
  220. Glow modulation tubes
  221. Transformer Hum leaks to Speakers
  222. EAR Yoshino V20 Amplifier
  223. starting PP - 6p3s
  224. 6BL7 rA in PP
  225. Why such high plate voltage in 2A3 DRD?
  226. to parafeed or not to parafeed that is the question
  227. Lowering voltage output of transformer
  228. Using EL34 in a line stage
  229. peerless transfomer information
  230. Output transformer design for SS amp
  231. CD source fortube amp
  232. What's the SIMPLEST 50W or higher Amp Schematic but best sound you've heard ?
  233. BIG tube amplifier, two qbl5/3500 tubes
  234. EL34 or 6L6 mono help me please!!
  235. Why don't we use output tubes as cathode followers?
  236. 6C33 driver recommendations
  237. Minimum Zener Current with Pass Device
  238. Favorite easy 6V6 push-pull circuit?
  239. Tubecad soft-clipping circuit
  240. broskie voltage regulator
  241. E88CC dissipation in Aikido
  242. Magnavox 6BQ5/EL84 and Mr. Gabe
  243. Aikido hum has me stumped !!!!
  244. 5842 and 5842 WA for 300B
  245. Basic tube combination question.
  246. Resistive ps voltage follower
  247. First time DIY tube
  248. Need help with hum and faint left channel on my S5 Electronics kit
  249. grid impedence of paralleled tubes in push pull
  250. rectification

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