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  1. Heptode audio preamp? ECH83
  2. E130L in Triode mode
  3. class AB2 who's using it for hifi?
  4. Obscure radio tube
  5. another mingda
  6. tube hum in Aikido
  7. equivalent input impedance
  8. 6DG6GT "Magic Amp"
  9. Solen Fast Cap vs ASC film/oils in PS
  10. Tektronix transformers
  11. *very* basic plate resistance Q
  12. Yaqin MC-5881A amplifier improvements
  13. Tube design software
  14. More wasted space
  15. Radio tube guitar preamp
  16. PC Mount Novar Socket Suppliers
  17. Planning my first project
  18. Power Transformer leakage
  19. current sensing in series with anode resistors
  20. Please recommend a 9-pin dual triode = 417A
  21. Dynaco Pas 2
  22. Anyone have accurate charts for a KT90?
  23. Calling all Phono Preamp gurus, I'm looking for some plans
  24. Measuring Unknown Transformers
  25. Swinging choke vs std. choke in PS
  26. scope tests on a Heathkit A7E
  27. tube hum in a 6SN7 Aikido - is this weird?
  28. ECC807 preamp
  29. Ode to the 8416
  30. CCS 10M45 in Cathode of CF Driver
  31. Audionics help
  32. what 8-pin tubes would you suggest for an aikido preamp?
  33. KT88 tubes
  34. Any one tried these transformers?
  35. Williamson 6L6 Monoblocks (Finally)
  36. Master Volume preamp.. simple?
  37. ~2 watt SET decision
  38. retube order
  39. MC Riaa preamp help/opinions please
  40. WTB Fairchild 260 transformers
  41. Peter Millet amp
  42. 1946 Gibson BR-4 Amplifier tube question
  43. Power Regulator PCB's and Aikido parts
  44. A heater wiring DOH! moment??
  45. hum in fisher 800c phono section
  46. Aikido warm-up hum, resistor types, etc.
  47. Any of these tubes good for amps?
  48. Mini 98 El84 PP amplifier
  49. 1X6S33S=6X6S19P which one gives less impedance?
  50. schematic for 12.6 VDC heaters
  51. PP transformer for SE?? Help!
  52. 7-pin miniature tubes for audio?
  53. Tube Preamp as a Guitar Effect
  54. 6L6GT vs. EL34/6CA7 and WHY?
  55. Tube rectifier help
  56. Fender push pull amp... using one tube only.. is it dangerous?
  57. KT88 Lifetime estimation
  58. Adjustable distributed load discussion
  59. Thyratron voltage regulation
  60. switch-on, switch-off sequence for preamp/amp
  61. Found Meixing Amp schematic, sorta, would like some feedback
  62. Tube Voltage Regulator Flicker...
  63. Projects...How does one decide ?
  64. Best 6550's for the money....
  65. SMPS and tubes
  66. Looking for Eico 1030 manual/schematic
  67. 6AS7 OTL
  68. Gary Pimm's site down?
  69. 805 + 300b Amplifier Schematic
  70. Music Angel Amplifiers
  71. MM Phono stage (kit?) for tube newbie
  72. Russian tube dealer?
  73. STA1 + amp vs K-12M
  74. cheap ebay KT88 amp
  75. Tubes at low +B...
  76. Converting a yarland amp to drive headphones
  77. Starting a component system
  78. Really elementary question about caps.
  79. Tube newbie with Scott 299B
  80. 12AV7- 5965 Vs 12AY7
  81. PX25 tubes in a 300B Amp?
  82. help with a choke.
  83. 60Hz buzzing
  84. nuvistor bias with 18V ?
  85. ground bus for inputs on preamp - what's best?
  86. Voltage drop of various regulators in dc regulated power supply for preamp
  87. Does anyone recognise this tube amp?
  88. Entry level tube amp
  89. Anyone build/use 6BG6G?
  90. KT-77 Blues
  91. Dynaco Information MArk II Required
  92. tube test numbers - what do they mean?
  93. foolish notion, 12GN7 model?
  94. First-Timer Doubts: K-12 or Gainclone?
  95. Eico ST70 Rebuild / Upgrade
  96. More power in this
  97. Help modifiying schematic
  98. Simple Variable Tube Power Supply
  99. bias voltage vs bias current
  100. All the Bias options
  101. 6N6G looks like a great audio tube. . .
  102. Variable bias
  103. Tube amp on a budget
  104. tung sol
  105. How cool is tube deep cooling?
  106. Modified Fender Deluxe - Constant Current Phase Splitter
  107. 12B4 Equivalents?
  108. KT88 pp triode control grid resistor????
  109. Duncan Amps spice model docs...
  110. Hum in Legend amp
  111. Which do you prefer - EL84 UL PP or EL34 Triode PP - and why?
  112. Mullard high speed tester
  113. Joining two NCT transformers
  114. Stereo Driver PCB for PP Amp (EL34/KT88)?
  115. Tube Integrated Amp Kit Project
  116. 866A transient over-current capability?
  117. 6HS8 tubes for volume control
  118. cathode for plate ccs ?
  119. Broken Tube pin guides
  120. I need a 120v ct transformer... Where to look?
  121. Best production EL34?
  122. 6DJ8 or 12AT7
  123. 6L6 Single Ended Flea Amp?
  124. Se Tranny used on Parafeed!!!
  125. Hammond 270 series power transformer?
  126. 6aq5.......6v6.......
  127. 6N1 substitution with 6922
  128. driving 845 push-pull with a signal from a 300B SE stage
  129. Recommend a schematic for a Moving Coil head amp?
  130. Tube Buffer 6J1 / 5654 (6AK5)
  131. question about 6Av5ga tubes
  132. Toroidal SE transformers
  133. Calling MR. Tubelab! 6W6GT?
  134. Triode Trick
  135. SE 300B or PP KT88 amps?
  136. perhaps an INSANE query...
  137. Possible to estimate transformer specs?
  138. 9 pin replacement sockets
  139. Bench PSU
  140. Need help to make a correct 83 (merc.vapor.rect) SS replacement.
  141. Joke of the day
  142. $300 tube amp budget. Which Amp??
  143. Simple Linestage for 27 or 1H5?
  144. Foreplay III pre amp
  145. Fixing this 100TH
  146. I have some 5654
  147. Multisegment capacitor replacement help.
  148. Amplifer calculation
  149. Auto Bias?
  150. Se KT88 with Quad ESL
  151. Parts from Salvage
  152. power supply question.... too many Volts?
  153. Heathkit A7E Conversion to Guitar
  154. Now wouldn’t this make an awesome monoblock.
  155. Please,help me for schematics!!
  156. Kofi Annan in: "Open for Suggestion"
  157. What connector for 300vDC DOMESTIC environment?
  158. looking for help in transformers.
  159. problems with 805 tubes
  160. Audio Research D-90
  161. Replacing a 12AU7 in a cathode-follower.
  162. Original Dynaco 70 circuit mods/upgrades?
  163. is there a power supply unit for prototyping?
  164. Power Supply Design and Blocking
  165. OTL questions
  166. PP- which input/splitter topology??
  167. Cathode feedback and DHTs
  168. How should Dick Olsher Blue Velvet measure??
  169. Info on Melos MA-111?
  170. Aikido with dual personality
  171. Making a hole for AC socket in a chassis
  172. Liteaudio LS31 preamp pcb
  173. Thoughts on Quad II output topology
  174. HF-85 Rebuild advice
  175. Cheap Williamson amp kit
  176. Mr'Liang audio amplifiers
  177. plate ccs
  178. DC Huuuummmmmm
  179. Hey Gingertube - trying to debug Baby Huey
  180. question about nOrh SE 9 amp for FE207E
  181. 6N1P or EF86 for bass guitar preamp?
  182. Arc D150
  183. help identify this "cleartop 6550"
  184. Cheap emergency gold sockets
  185. Is Western Electric for Real? KT88 Scam?
  186. Russian 635P?
  187. Swinging Choke or Smoothing Choke
  188. Amp de-bugging
  189. SMPS for B+ from PC PS
  190. Placement of tone stacks
  191. Rectify AC to DC for heating
  192. KT88 in class B
  193. 6FE5 Ultralinear?
  194. OPT -the good, the bad or the ugly ??
  195. Switching power supply for tube-pre
  196. Using a zener to drop plate+screen voltages
  197. Will this circuit work?
  198. Ei 6CW5, any users?
  199. Simple tube preamp?
  200. push-pull and primary impedance
  201. DIY : SWR Interstellar OverDrive (bass preamp)
  202. sound valves m-40 schematics
  203. series connection of filament in push pull output stage
  204. Has anybody built this amp?
  205. Red Light District Amp Screen Reg
  206. AEG rectifier
  207. Gm emulator for calibration
  208. Greetings and a couple of questions
  209. Tubes in a chip amp power stage??
  210. Yaqin MC-10L Preamp Tubes
  211. Sound of paralleld EL84
  212. Preamp Question
  213. WTH -- UL back to triode connection
  214. $139 tube amp but cant remember where i saw it...
  215. better 6au6 alternative
  216. type 40 triode curves
  217. Cap size for Hg Rectifiers
  218. Anybody have experience building an OTL amp?
  219. measuring hum
  220. Nytone SA2000
  221. Inter stage iron in High End
  222. very peculiar psu problem
  223. 12A6 Healthkit A7 Amp
  224. testing a 13E1
  225. JE Labs / Arnold Cruz 2A3 amp - Q
  226. 5842 grounded grid
  227. Russian RF Double Tetrodes
  228. Opinions or inputs on Altec 1570B amplifiers
  229. Chinese EL34 amp to modify
  230. GE 97F cap polarity ???
  231. 6C8G phase inverter
  232. Shall I disassemble this ampex for parts?
  233. Power Amp Build from Eico ST70 - Negative Feedback Question
  234. ECC83 cathode grounded = awesome overdrive (?!?!?)
  235. Looking for a Balanced Mic Preamp w 12AX7
  236. Does anyone has a T.A.C.-34 or a T.A.C.-88 schematic?
  237. Conrad Johnson PV10L Phono stage DIY
  238. NEW KT66's
  239. Edcor outputs?
  240. Schematic Comment on 'Principles of Power" book ??
  241. what kind of resistor is this?
  242. stereo push pull amp one heater supply for power tubes
  243. Building new GU-50 stereo amp...
  244. Tubes and microphonics
  245. 829 or GU-29 audio amplifier schematics?
  246. Electrolytic types...
  247. Consonance t99 schematic/ minimax pre
  248. Useful Supplier of Transformers, Chokes, Chassis and other stuff
  249. Serious case of brain fry. You out there Thorsten?
  250. Upgrading a Beard P100 tubeamp

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