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  1. Need Help on HEATHKIT W-5M Power Transformer
  2. Fully isolated oilbath transformer.
  3. small signal DHT or DHP like AVVT20/8?
  4. EL 84 Pentode Config.
  5. Amp Tubes
  6. Can I replace the 1M volume pot with a 100K one in my HK A300?
  7. what's a hum band?
  8. Tube phono pre-amp needed.
  9. U/L or triode mode on music angel amp
  10. Why do some people dislike ultralinear?
  11. Adaptive class A
  12. 6X4 Tube rectifier.
  13. AN Conquest Clone modification
  14. Beautiful tubes.
  15. Selectable EL34/6L6 Amp OT
  16. Simple circlotron amp
  17. 12AX7 how many is enough?
  18. samples of 300B in pse or pp
  19. power supply choke with a connection for AC ground?
  20. musical fidelity x10d schematic
  21. Pot Value
  22. Eico 666 (satan's choice) tube tester help.
  23. Minor crackling in new valves
  24. Aikido linestage Help Needed
  25. Scott 299A Schematic
  26. Q on PP & current mirrors
  27. Calculating PT headroom in PP class AB
  28. EL34 Failure
  29. Aikido Transformer recommendation
  30. No mains transformer B+ ?
  31. Help with horizontal mounting of 01-A and VR tubes
  32. twisted pair wiring on a tube amp
  33. Calculating SE Output Question
  34. Fixed-Bias Williamson EL34
  35. Bogen CHB-35 Preamp Mod
  36. resistors and sonic effects?
  37. tamura F-683 pole question
  38. EC52--Plate choke--300B/45/2a3/50/EL34 SE
  39. vtl deluxe 300 mb
  40. Is SD a Schottky Diode in this schematic?
  41. Maida regulator
  42. 572B vs 845 vs 211 SE
  43. Yet Another EL84 Amp
  44. Regulator for tube pre
  45. referencing heater supply ground to B+
  46. One Question for Hammond 1620 output transformer
  47. Bias adjustment on Dynaco ST70
  48. To SRPP or not?
  49. 811 vs 811A?
  50. Bogen integrated stereo amp
  51. Audionote japan ( Kondo) Ongaku..Can I ......... Clone to DIY!!!!!!!
  52. Broken 6L6WXT tube
  53. transformer questions
  54. Microphone With A Low Impedance Tube
  55. 6EM7 Push-Pull
  56. polarity of Xicon electrolytics
  57. SE EL84 question
  58. ST-70 Power Transformer Info
  59. My new quad SED EL34 arrived
  60. isolation transformer for 50C5 amp
  61. DSP and vacuum tubes (from Analog Devices)
  62. Asymmetrical P-P OPT Primary
  63. Gated beam discriminator "amplifier"
  64. PCB Mount Loctal Socket?
  65. "Zero bias"/ driving the grid positive
  66. Low Profile Power Transformer Help
  67. Lowering Gain on an Aikido Preamp
  68. HELP; DIY PP amp - it's phase splitter, or buy Chineese.
  69. Tube vs. SS CCS...
  70. Another "I need an amp recommendation" thread
  71. i am a new one here
  72. i am new ! can you help me
  73. Pentode CCS: Would somebody check my work?
  74. PSU for 12V DC heaters
  75. 50C5 Triode strapped?
  76. homemade faceplates
  77. Can I build this?
  78. Heptode audio preamp? ECH83
  79. E130L in Triode mode
  80. class AB2 who's using it for hifi?
  81. Obscure radio tube
  82. another mingda
  83. tube hum in Aikido
  84. equivalent input impedance
  85. 6DG6GT "Magic Amp"
  86. Solen Fast Cap vs ASC film/oils in PS
  87. Tektronix transformers
  88. *very* basic plate resistance Q
  89. Yaqin MC-5881A amplifier improvements
  90. Tube design software
  91. More wasted space
  92. PC Mount Novar Socket Suppliers
  93. Planning my first project
  94. Power Transformer leakage
  95. current sensing in series with anode resistors
  96. Please recommend a 9-pin dual triode = 417A
  97. Dynaco Pas 2
  98. Anyone have accurate charts for a KT90?
  99. Calling all Phono Preamp gurus, I'm looking for some plans
  100. Measuring Unknown Transformers
  101. Swinging choke vs std. choke in PS
  102. scope tests on a Heathkit A7E
  103. tube hum in a 6SN7 Aikido - is this weird?
  104. ECC807 preamp
  105. Ode to the 8416
  106. CCS 10M45 in Cathode of CF Driver
  107. Audionics help
  108. what 8-pin tubes would you suggest for an aikido preamp?
  109. KT88 tubes
  110. Any one tried these transformers?
  111. Williamson 6L6 Monoblocks (Finally)
  112. ~2 watt SET decision
  113. retube order
  114. MC Riaa preamp help/opinions please
  115. WTB Fairchild 260 transformers
  116. Peter Millet amp
  117. Power Regulator PCB's and Aikido parts
  118. A heater wiring DOH! moment??
  119. hum in fisher 800c phono section
  120. Aikido warm-up hum, resistor types, etc.
  121. Any of these tubes good for amps?
  122. Mini 98 El84 PP amplifier
  123. 1X6S33S=6X6S19P which one gives less impedance?
  124. schematic for 12.6 VDC heaters
  125. PP transformer for SE?? Help!
  126. 7-pin miniature tubes for audio?
  127. 6L6GT vs. EL34/6CA7 and WHY?
  128. Tube rectifier help
  129. KT88 Lifetime estimation
  130. Adjustable distributed load discussion
  131. Thyratron voltage regulation
  132. switch-on, switch-off sequence for preamp/amp
  133. Found Meixing Amp schematic, sorta, would like some feedback
  134. Tube Voltage Regulator Flicker...
  135. Projects...How does one decide ?
  136. Best 6550's for the money....
  137. SMPS and tubes
  138. Looking for Eico 1030 manual/schematic
  139. 6AS7 OTL
  140. Gary Pimm's site down?
  141. 805 + 300b Amplifier Schematic
  142. Music Angel Amplifiers
  143. MM Phono stage (kit?) for tube newbie
  144. Russian tube dealer?
  145. STA1 + amp vs K-12M
  146. cheap ebay KT88 amp
  147. Tubes at low +B...
  148. Converting a yarland amp to drive headphones
  149. Starting a component system
  150. Tube newbie with Scott 299B
  151. 12AV7- 5965 Vs 12AY7
  152. PX25 tubes in a 300B Amp?
  153. help with a choke.
  154. 60Hz buzzing
  155. nuvistor bias with 18V ?
  156. ground bus for inputs on preamp - what's best?
  157. Voltage drop of various regulators in dc regulated power supply for preamp
  158. Does anyone recognise this tube amp?
  159. Entry level tube amp
  160. Anyone build/use 6BG6G?
  161. KT-77 Blues
  162. Dynaco Information MArk II Required
  163. tube test numbers - what do they mean?
  164. foolish notion, 12GN7 model?
  165. First-Timer Doubts: K-12 or Gainclone?
  166. Eico ST70 Rebuild / Upgrade
  167. More power in this
  168. Help modifiying schematic
  169. Simple Variable Tube Power Supply
  170. bias voltage vs bias current
  171. All the Bias options
  172. 6N6G looks like a great audio tube. . .
  173. Variable bias
  174. Tube amp on a budget
  175. tung sol
  176. How cool is tube deep cooling?
  177. 12B4 Equivalents?
  178. KT88 pp triode control grid resistor????
  179. Duncan Amps spice model docs...
  180. Hum in Legend amp
  181. Which do you prefer - EL84 UL PP or EL34 Triode PP - and why?
  182. Mullard high speed tester
  183. Joining two NCT transformers
  184. Stereo Driver PCB for PP Amp (EL34/KT88)?
  185. Tube Integrated Amp Kit Project
  186. 866A transient over-current capability?
  187. 6HS8 tubes for volume control
  188. cathode for plate ccs ?
  189. Broken Tube pin guides
  190. I need a 120v ct transformer... Where to look?
  191. Best production EL34?
  192. 6DJ8 or 12AT7
  193. 6L6 Single Ended Flea Amp?
  194. Se Tranny used on Parafeed!!!
  195. Hammond 270 series power transformer?
  196. 6aq5.......6v6.......
  197. 6N1 substitution with 6922
  198. driving 845 push-pull with a signal from a 300B SE stage
  199. Recommend a schematic for a Moving Coil head amp?
  200. Tube Buffer 6J1 / 5654 (6AK5)
  201. question about 6Av5ga tubes
  202. Toroidal SE transformers
  203. Calling MR. Tubelab! 6W6GT?
  204. Triode Trick
  205. SE 300B or PP KT88 amps?
  206. perhaps an INSANE query...
  207. Possible to estimate transformer specs?
  208. 9 pin replacement sockets
  209. Bench PSU
  210. Need help to make a correct 83 (merc.vapor.rect) SS replacement.
  211. Joke of the day
  212. $300 tube amp budget. Which Amp??
  213. Simple Linestage for 27 or 1H5?
  214. Foreplay III pre amp
  215. Fixing this 100TH
  216. I have some 5654
  217. Amplifer calculation
  218. Auto Bias?
  219. Se KT88 with Quad ESL
  220. Parts from Salvage
  221. power supply question.... too many Volts?
  222. Now wouldn’t this make an awesome monoblock.
  223. Please,help me for schematics!!
  224. Kofi Annan in: "Open for Suggestion"
  225. What connector for 300vDC DOMESTIC environment?
  226. looking for help in transformers.
  227. problems with 805 tubes
  228. Audio Research D-90
  229. Replacing a 12AU7 in a cathode-follower.
  230. Original Dynaco 70 circuit mods/upgrades?
  231. is there a power supply unit for prototyping?
  232. Power Supply Design and Blocking
  233. OTL questions
  234. PP- which input/splitter topology??
  235. Cathode feedback and DHTs
  236. How should Dick Olsher Blue Velvet measure??
  237. Info on Melos MA-111?
  238. Aikido with dual personality
  239. Making a hole for AC socket in a chassis
  240. Liteaudio LS31 preamp pcb
  241. Thoughts on Quad II output topology
  242. HF-85 Rebuild advice
  243. Cheap Williamson amp kit
  244. Mr. Liang audio amplifiers
  245. plate ccs
  246. DC Huuuummmmmm
  247. Hey Gingertube - trying to debug Baby Huey
  248. question about nOrh SE 9 amp for FE207E
  249. Arc D150
  250. help identify this "cleartop 6550"

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