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  1. polarity of Xicon electrolytics
  2. SE EL84 question
  3. ST-70 Power Transformer Info
  4. My new quad SED EL34 arrived
  5. isolation transformer for 50C5 amp
  6. DSP and vacuum tubes (from Analog Devices)
  7. Asymmetrical P-P OPT Primary
  8. Gated beam discriminator "amplifier"
  9. PCB Mount Loctal Socket?
  10. "Zero bias"/ driving the grid positive
  11. Low Profile Power Transformer Help
  12. Lowering Gain on an Aikido Preamp
  13. HELP; DIY PP amp - it's phase splitter, or buy Chineese.
  14. Tube vs. SS CCS...
  15. Another "I need an amp recommendation" thread
  16. i am a new one here
  17. i am new ! can you help me
  18. Pentode CCS: Would somebody check my work?
  19. PSU for 12V DC heaters
  20. 50C5 Triode strapped?
  21. homemade faceplates
  22. Can I build this?
  23. Heptode audio preamp? ECH83
  24. E130L in Triode mode
  25. class AB2 who's using it for hifi?
  26. Obscure radio tube
  27. another mingda
  28. tube hum in Aikido
  29. equivalent input impedance
  30. 6DG6GT "Magic Amp"
  31. Tektronix transformers
  32. *very* basic plate resistance Q
  33. Yaqin MC-5881A amplifier improvements
  34. Tube design software
  35. More wasted space
  36. PC Mount Novar Socket Suppliers
  37. Planning my first project
  38. Power Transformer leakage
  39. current sensing in series with anode resistors
  40. Please recommend a 9-pin dual triode = 417A
  41. Dynaco Pas 2
  42. Anyone have accurate charts for a KT90?
  43. Calling all Phono Preamp gurus, I'm looking for some plans
  44. Measuring Unknown Transformers
  45. Swinging choke vs std. choke in PS
  46. scope tests on a Heathkit A7E
  47. tube hum in a 6SN7 Aikido - is this weird?
  48. ECC807 preamp
  49. Ode to the 8416
  50. CCS 10M45 in Cathode of CF Driver
  51. Audionics help
  52. what 8-pin tubes would you suggest for an aikido preamp?
  53. KT88 tubes
  54. Any one tried these transformers?
  55. Williamson 6L6 Monoblocks (Finally)
  56. ~2 watt SET decision
  57. retube order
  58. MC Riaa preamp help/opinions please
  59. WTB Fairchild 260 transformers
  60. Peter Millet amp
  61. Power Regulator PCB's and Aikido parts
  62. A heater wiring DOH! moment??
  63. hum in fisher 800c phono section
  64. Aikido warm-up hum, resistor types, etc.
  65. Any of these tubes good for amps?
  66. Mini 98 El84 PP amplifier
  67. 1X6S33S=6X6S19P which one gives less impedance?
  68. schematic for 12.6 VDC heaters
  69. PP transformer for SE?? Help!
  70. 7-pin miniature tubes for audio?
  71. 6L6GT vs. EL34/6CA7 and WHY?
  72. Tube rectifier help
  73. KT88 Lifetime estimation
  74. Adjustable distributed load discussion
  75. Thyratron voltage regulation
  76. switch-on, switch-off sequence for preamp/amp
  77. Found Meixing Amp schematic, sorta, would like some feedback
  78. Tube Voltage Regulator Flicker...
  79. Projects...How does one decide ?
  80. Best 6550's for the money....
  81. SMPS and tubes
  82. Looking for Eico 1030 manual/schematic
  83. 6AS7 OTL
  84. Gary Pimm's site down?
  85. 805 + 300b Amplifier Schematic
  86. Music Angel Amplifiers
  87. MM Phono stage (kit?) for tube newbie
  88. Russian tube dealer?
  89. STA1 + amp vs K-12M
  90. cheap ebay KT88 amp
  91. Tubes at low +B...
  92. Converting a yarland amp to drive headphones
  93. Starting a component system
  94. Tube newbie with Scott 299B
  95. 12AV7- 5965 Vs 12AY7
  96. PX25 tubes in a 300B Amp?
  97. help with a choke.
  98. 60Hz buzzing
  99. nuvistor bias with 18V ?
  100. ground bus for inputs on preamp - what's best?
  101. Voltage drop of various regulators in dc regulated power supply for preamp
  102. Does anyone recognise this tube amp?
  103. Entry level tube amp
  104. Anyone build/use 6BG6G?
  105. KT-77 Blues
  106. Dynaco Information MArk II Required
  107. tube test numbers - what do they mean?
  108. foolish notion, 12GN7 model?
  109. First-Timer Doubts: K-12 or Gainclone?
  110. Eico ST70 Rebuild / Upgrade
  111. More power in this
  112. Help modifiying schematic
  113. Simple Variable Tube Power Supply
  114. bias voltage vs bias current
  115. All the Bias options
  116. 6N6G looks like a great audio tube. . .
  117. Variable bias
  118. Tube amp on a budget
  119. tung sol
  120. How cool is tube deep cooling?
  121. 12B4 Equivalents?
  122. KT88 pp triode control grid resistor????
  123. Duncan Amps spice model docs...
  124. Hum in Legend amp
  125. Which do you prefer - EL84 UL PP or EL34 Triode PP - and why?
  126. Mullard high speed tester
  127. Joining two NCT transformers
  128. Stereo Driver PCB for PP Amp (EL34/KT88)?
  129. Tube Integrated Amp Kit Project
  130. 866A transient over-current capability?
  131. 6HS8 tubes for volume control
  132. cathode for plate ccs ?
  133. Broken Tube pin guides
  134. I need a 120v ct transformer... Where to look?
  135. Best production EL34?
  136. 6DJ8 or 12AT7
  137. 6L6 Single Ended Flea Amp?
  138. Se Tranny used on Parafeed!!!
  139. Hammond 270 series power transformer?
  140. 6aq5.......6v6.......
  141. 6N1 substitution with 6922
  142. driving 845 push-pull with a signal from a 300B SE stage
  143. Recommend a schematic for a Moving Coil head amp?
  144. Tube Buffer 6J1 / 5654 (6AK5)
  145. question about 6Av5ga tubes
  146. Toroidal SE transformers
  147. Triode Trick
  148. SE 300B or PP KT88 amps?
  149. perhaps an INSANE query...
  150. Possible to estimate transformer specs?
  151. 9 pin replacement sockets
  152. Bench PSU
  153. Need help to make a correct 83 (merc.vapor.rect) SS replacement.
  154. Joke of the day
  155. $300 tube amp budget. Which Amp??
  156. Simple Linestage for 27 or 1H5?
  157. Foreplay III pre amp
  158. Fixing this 100TH
  159. I have some 5654
  160. Amplifer calculation
  161. Auto Bias?
  162. Se KT88 with Quad ESL
  163. Parts from Salvage
  164. power supply question.... too many Volts?
  165. Now wouldn’t this make an awesome monoblock.
  166. Please,help me for schematics!!
  167. Kofi Annan in: "Open for Suggestion"
  168. What connector for 300vDC DOMESTIC environment?
  169. looking for help in transformers.
  170. problems with 805 tubes
  171. Audio Research D-90
  172. Replacing a 12AU7 in a cathode-follower.
  173. Original Dynaco 70 circuit mods/upgrades?
  174. is there a power supply unit for prototyping?
  175. Power Supply Design and Blocking
  176. OTL questions
  177. PP- which input/splitter topology??
  178. Cathode feedback and DHTs
  179. How should Dick Olsher Blue Velvet measure??
  180. Info on Melos MA-111?
  181. Aikido with dual personality
  182. Making a hole for AC socket in a chassis
  183. Liteaudio LS31 preamp pcb
  184. Thoughts on Quad II output topology
  185. HF-85 Rebuild advice
  186. Cheap Williamson amp kit
  187. Mr. Liang audio amplifiers
  188. plate ccs
  189. DC Huuuummmmmm
  190. Hey Gingertube - trying to debug Baby Huey
  191. question about nOrh SE 9 amp for FE207E
  192. Arc D150
  193. help identify this "cleartop 6550"
  194. Cheap emergency gold sockets
  195. Is Western Electric for Real? KT88 Scam?
  196. Russian 635P?
  197. Swinging Choke or Smoothing Choke
  198. Amp de-bugging
  199. SMPS for B+ from PC PS
  200. Placement of tone stacks
  201. Rectify AC to DC for heating
  202. KT88 in class B
  203. 6FE5 Ultralinear?
  204. OPT -the good, the bad or the ugly ??
  205. Switching power supply for tube-pre
  206. Using a zener to drop plate+screen voltages
  207. Will this circuit work?
  208. Ei 6CW5, any users?
  209. Simple tube preamp?
  210. push-pull and primary impedance
  211. DIY : SWR Interstellar OverDrive (bass preamp)
  212. sound valves m-40 schematics
  213. series connection of filament in push pull output stage
  214. Has anybody built this amp?
  215. Red Light District Amp Screen Reg
  216. AEG rectifier
  217. Gm emulator for calibration
  218. Greetings and a couple of questions
  219. Tubes in a chip amp power stage??
  220. Yaqin MC-10L Preamp Tubes
  221. Sound of paralleld EL84
  222. Preamp Question
  223. WTH -- UL back to triode connection
  224. $139 tube amp but cant remember where i saw it...
  225. better 6au6 alternative
  226. type 40 triode curves
  227. Cap size for Hg Rectifiers
  228. Anybody have experience building an OTL amp?
  229. measuring hum
  230. Nytone SA2000
  231. Inter stage iron in High End
  232. very peculiar psu problem
  233. 12A6 Healthkit A7 Amp
  234. testing a 13E1
  235. JE Labs / Arnold Cruz 2A3 amp - Q
  236. 5842 grounded grid
  237. Russian RF Double Tetrodes
  238. Opinions or inputs on Altec 1570B amplifiers
  239. Chinese EL34 amp to modify
  240. GE 97F cap polarity ???
  241. 6C8G phase inverter
  242. Shall I disassemble this ampex for parts?
  243. Power Amp Build from Eico ST70 - Negative Feedback Question
  244. ECC83 cathode grounded = awesome overdrive (?!?!?)
  245. Looking for a Balanced Mic Preamp w 12AX7
  246. Does anyone has a T.A.C.-34 or a T.A.C.-88 schematic?
  247. Conrad Johnson PV10L Phono stage DIY
  248. NEW KT66's
  249. Edcor outputs?
  250. Schematic Comment on 'Principles of Power" book ??

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