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  1. Please,help me for schematics!!
  2. Kofi Annan in: "Open for Suggestion"
  3. What connector for 300vDC DOMESTIC environment?
  4. looking for help in transformers.
  5. problems with 805 tubes
  6. Audio Research D-90
  7. Replacing a 12AU7 in a cathode-follower.
  8. Original Dynaco 70 circuit mods/upgrades?
  9. is there a power supply unit for prototyping?
  10. Power Supply Design and Blocking
  11. OTL questions
  12. PP- which input/splitter topology??
  13. Cathode feedback and DHTs
  14. How should Dick Olsher Blue Velvet measure??
  15. Info on Melos MA-111?
  16. Aikido with dual personality
  17. Making a hole for AC socket in a chassis
  18. Liteaudio LS31 preamp pcb
  19. Thoughts on Quad II output topology
  20. HF-85 Rebuild advice
  21. Cheap Williamson amp kit
  22. Mr. Liang audio amplifiers
  23. plate ccs
  24. DC Huuuummmmmm
  25. Hey Gingertube - trying to debug Baby Huey
  26. question about nOrh SE 9 amp for FE207E
  27. 6N1P or EF86 for bass guitar preamp?
  28. Arc D150
  29. help identify this "cleartop 6550"
  30. Cheap emergency gold sockets
  31. Is Western Electric for Real? KT88 Scam?
  32. Russian 635P?
  33. Swinging Choke or Smoothing Choke
  34. Amp de-bugging
  35. SMPS for B+ from PC PS
  36. Placement of tone stacks
  37. Rectify AC to DC for heating
  38. KT88 in class B
  39. 6FE5 Ultralinear?
  40. OPT -the good, the bad or the ugly ??
  41. Switching power supply for tube-pre
  42. Using a zener to drop plate+screen voltages
  43. Will this circuit work?
  44. Ei 6CW5, any users?
  45. Simple tube preamp?
  46. push-pull and primary impedance
  47. DIY : SWR Interstellar OverDrive (bass preamp)
  48. sound valves m-40 schematics
  49. series connection of filament in push pull output stage
  50. Has anybody built this amp?
  51. Red Light District Amp Screen Reg
  52. AEG rectifier
  53. Gm emulator for calibration
  54. Greetings and a couple of questions
  55. Tubes in a chip amp power stage??
  56. Yaqin MC-10L Preamp Tubes
  57. Sound of paralleld EL84
  58. Preamp Question
  59. WTH -- UL back to triode connection
  60. $139 tube amp but cant remember where i saw it...
  61. better 6au6 alternative
  62. type 40 triode curves
  63. Cap size for Hg Rectifiers
  64. Anybody have experience building an OTL amp?
  65. measuring hum
  66. Nytone SA2000
  67. Inter stage iron in High End
  68. very peculiar psu problem
  69. 12A6 Healthkit A7 Amp
  70. testing a 13E1
  71. JE Labs / Arnold Cruz 2A3 amp - Q
  72. 5842 grounded grid
  73. Russian RF Double Tetrodes
  74. Opinions or inputs on Altec 1570B amplifiers
  75. Chinese EL34 amp to modify
  76. GE 97F cap polarity ???
  77. 6C8G phase inverter
  78. Shall I disassemble this ampex for parts?
  79. Power Amp Build from Eico ST70 - Negative Feedback Question
  80. ECC83 cathode grounded = awesome overdrive (?!?!?)
  81. Looking for a Balanced Mic Preamp w 12AX7
  82. Does anyone has a T.A.C.-34 or a T.A.C.-88 schematic?
  83. Conrad Johnson PV10L Phono stage DIY
  84. NEW KT66's
  85. Edcor outputs?
  86. Schematic Comment on 'Principles of Power" book ??
  87. what kind of resistor is this?
  88. stereo push pull amp one heater supply for power tubes
  89. Building new GU-50 stereo amp...
  90. Tubes and microphonics
  91. 829 or GU-29 audio amplifier schematics?
  92. Electrolytic types...
  93. Consonance t99 schematic/ minimax pre
  94. Useful Supplier of Transformers, Chokes, Chassis and other stuff
  95. Serious case of brain fry. You out there Thorsten?
  96. Upgrading a Beard P100 tubeamp
  97. Tube Amplifier with OT100
  98. bogen m120 schematic
  99. Question about Thorsten's Tube Phono Pre
  100. PP Output Trafo Measurement
  101. push pull balancing
  102. New issue Mullard Tubes
  103. Help on triode
  104. 5 Volt Damper Diodes?
  105. Please help diagnose preamp problem
  106. 6N1/6N3 substitution
  107. Cathode feedback and input impedance
  108. Optimal ripple voltage on b+ supply
  109. Setup suggestion between DAC-AH and ST-70
  110. Simple Low Voltage Tube Preamp?
  111. Anyone built this 100W GEC amp? How is the sound?
  112. Does anyone have VT150 schematic?
  113. Ignition Coil Toobe Amplifier
  114. Voltage swing of Heffa?
  115. All pentode PP amp?
  116. GZ34 anode load resistor calculation - help?
  117. Capacitor choice for attached schematic
  118. The sound of... tubes !
  119. All quiet on the SN front - recommended choice of tubes
  120. Moscode 600 hum/turn off thump
  121. Tube Tester Resto Basics
  122. Marshall 100v 8100U Guitar Amp Hums
  123. What's the simple killer tube amp? Anyone?
  124. Help - CFB in a KT88 SE amp
  125. Any Russian speakers here?
  126. 6av6 Diode use?
  127. Power Supply
  128. Choke rating for choke input duty
  129. drawing a loadline for a power stage EL34 tube.
  130. Experiencing problems to insert tubes
  131. Preamp signal wiring ideas ?
  132. el34PP circuit evaluation!!
  133. "Re-Forming" Caps on Old Tube Amp
  134. Gary Pimm website?
  135. Haltron (UK), Trigon (UK) and Ultron (germany) ECC83 tubes info request.
  136. Audio Research D150 bias setting
  137. Cathodyne phase splitter with CCS?
  138. Has anyone tried 2 x 6550 100W amp?
  139. modelling PSU for Aikido
  140. 27 head phone amp or.??
  141. New Chassis Fabrication Pics and Capacitor Question
  142. Replacing old caps in the SP8 pre-amp
  143. Tube choice for Class A2
  144. hybrid graetz in PSUDII
  145. 6C45P Spud
  146. Philips ECG 12AX7WA or GE 5751 ?? Opinions, please.
  147. Single Ended EL34 Amp
  148. Rp / Rk on Aikido preamp
  149. hum in amp!
  150. Looking for a 83 rectifier model
  151. Advice wanted on ebay SET amps
  152. Resistors for ultralinear-to-triode conversion
  153. Gary Pimm
  154. resistor values for lifting ground AND LED
  155. output transformer impedance choices
  156. Feedback disc recording amp
  157. 6bm8/ECL82 vs EL84
  158. B+ filter caps
  159. (Newbie) CSS Question
  160. 6P15P Tubes: Push Pull Possible?
  161. Tube X-ref list ??
  162. AVO tube tester spares
  163. Add gain before or after the phase splitter?
  164. ping SY: Red Light LED question
  165. Greinacher voltage multiplier
  166. Dead channel
  167. Euphonia is back!
  168. What's the best 417A & 437A?
  169. Eico ST70 OPT / Schematic Question
  170. Is this feasible?
  171. Repairing 805 tubes
  172. jadis defy 7 help
  173. 6n1p Screen
  174. Mc275ce
  175. Are these tubes are the same?
  176. "King of tube(s) for line-stages"
  177. Acoustic Plan PhonoMaster
  178. Heathkit AA-81 schematic
  179. has anyone kept a copy of gpimm's latest self-biasing CCS?
  180. How to wire inductor - s and n
  181. Rogers Cadet III schematics Corrections
  182. Hickok TV-7/U restoration advice needed.
  183. Rogers Cadet III to SY's Red Light District or Gingertubes's Baby Huey
  184. 24v Aikido for newb.
  185. Powering Up Old Tube Amps/Receivers
  186. preliminary schematic drawing rev.1a
  187. Not a typical MKIII Dynaco.
  188. mosfet buffer for power stage
  189. 304TL based Class A
  190. EI KT-90 news
  191. Purchasing NOS Tubes
  192. tube power supply design resources
  193. High Voltage Regulator Design
  194. max. output for two 5881 tubes?
  195. Excessive current draw in Fender Deville
  196. driving your power stage
  197. Need schematic Cary Audio SLP-70 preamp
  198. Bridge-balanced amplifiers
  199. Tell-tale signs of good feedback usage?
  200. Any mid priced SE transformers around?
  201. Bias resistor
  202. Some sneek peeks
  203. Old radio with 4 pin sockets, info?
  204. need help on pot tapers
  205. A typical KT88 tubes
  206. amplifier for unknown output transformers?
  207. vista audio
  208. CV4014 and 5650 - any audio application of these tubes?
  209. SVP-PRO schematic
  210. Looking for a good source for attenuators
  211. Center-tap to ground?
  212. 6n1p-ev operating points
  213. where to find old pot's with switch built in
  214. Maggie refurb project
  215. Parafeed output
  216. Hirtel junior stereo italian tube amp
  217. power supply help
  218. 7189/7189A Problem
  219. Glow modulation tubes
  220. Transformer Hum leaks to Speakers
  221. EAR Yoshino V20 Amplifier
  222. Repair a tube tester?
  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. 100watt power, fixed gain far cleaner than Marshall amp any sugestion
  238. Minimum Zener Current with Pass Device
  239. Favorite easy 6V6 push-pull circuit?
  240. Tubecad soft-clipping circuit
  241. broskie voltage regulator
  242. E88CC dissipation in Aikido
  243. Magnavox 6BQ5/EL84 and Mr. Gabe
  244. Aikido hum has me stumped !!!!
  245. 5842 and 5842 WA for 300B
  246. Basic tube combination question.
  247. Resistive ps voltage follower
  248. First time DIY tube
  249. Need help with hum and faint left channel on my S5 Electronics kit
  250. grid impedence of paralleled tubes in push pull

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