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  1. Need help: Looking for ECF80 preamp schematic
  2. a 5AR4 after a diode bridge? what is the purpose?
  3. 807 & Pe 06/40n
  4. Board layout design
  5. 12AX7, 12AU7 Substitution
  6. 200,000 Tubes for sale in Michigan
  7. Ground scheme
  8. Help on 6L6GC Triode PP..working points..
  9. A neat trick?
  10. Setup & Implementation of G Pimm's Self-Bias CCS
  11. Tube Preamp FM interference
  12. Parafeed 6EM7 with 2k load?
  13. Need Help on HEATHKIT W-5M Power Transformer
  14. Fully isolated oilbath transformer.
  15. small signal DHT or DHP like AVVT20/8?
  16. EL 84 Pentode Config.
  17. Amp Tubes
  18. Can I replace the 1M volume pot with a 100K one in my HK A300?
  19. what's a hum band?
  20. Tube phono pre-amp needed.
  21. U/L or triode mode on music angel amp
  22. Why do some people dislike ultralinear?
  23. Adaptive class A
  24. 6X4 Tube rectifier.
  25. AN Conquest Clone modification
  26. Beautiful tubes.
  27. Selectable EL34/6L6 Amp OT
  28. Simple circlotron amp
  29. 12AX7 how many is enough?
  30. samples of 300B in pse or pp
  31. power supply choke with a connection for AC ground?
  32. Heathkit A7E for guitar - preamp gain
  33. musical fidelity x10d schematic
  34. Pot Value
  35. Eico 666 (satan's choice) tube tester help.
  36. Finally built a subminiature guitar amp... now I need help!
  37. Minor crackling in new valves
  38. Matchless Lightning v Spitfire
  39. Aikido linestage Help Needed
  40. Scott 299A Schematic
  41. Q on PP & current mirrors
  42. Calculating PT headroom in PP class AB
  43. EL34 Failure
  44. Aikido Transformer recommendation
  45. No mains transformer B+ ?
  46. Help with horizontal mounting of 01-A and VR tubes
  47. twisted pair wiring on a tube amp
  48. Calculating SE Output Question
  49. Fixed-Bias Williamson EL34
  50. Bogen CHB-35 Preamp Mod
  51. resistors and sonic effects?
  52. tamura F-683 pole question
  53. EC52--Plate choke--300B/45/2a3/50/EL34 SE
  54. vtl deluxe 300 mb
  55. Is SD a Schottky Diode in this schematic?
  56. Maida regulator
  57. 572B vs 845 vs 211 SE
  58. Yet Another EL84 Amp
  59. Regulator for tube pre
  60. referencing heater supply ground to B+
  61. One Question for Hammond 1620 output transformer
  62. Bias adjustment on Dynaco ST70
  63. To SRPP or not?
  64. Ampeg SVT-VR or SVT-CL Schematics
  65. 811 vs 811A?
  66. Bogen integrated stereo amp
  67. Audionote japan ( Kondo) Ongaku..Can I ......... Clone to DIY!!!!!!!
  68. Broken 6L6WXT tube
  69. transformer questions
  70. Microphone With A Low Impedance Tube
  71. 6EM7 Push-Pull
  72. polarity of Xicon electrolytics
  73. SE EL84 question
  74. Slightly Different guitar amp question
  75. ST-70 Power Transformer Info
  76. My new quad SED EL34 arrived
  77. isolation transformer for 50C5 amp
  78. DSP and vacuum tubes (from Analog Devices)
  79. Asymmetrical P-P OPT Primary
  80. Gated beam discriminator "amplifier"
  81. PCB Mount Loctal Socket?
  82. "Zero bias"/ driving the grid positive
  83. Low Profile Power Transformer Help
  84. Lowering Gain on an Aikido Preamp
  85. HELP; DIY PP amp - it's phase splitter, or buy Chineese.
  86. Tube vs. SS CCS...
  87. Another "I need an amp recommendation" thread
  88. i am a new one here
  89. i am new ! can you help me
  90. Pentode CCS: Would somebody check my work?
  91. PSU for 12V DC heaters
  92. 50C5 Triode strapped?
  93. homemade faceplates
  94. Can I build this?
  95. Heptode audio preamp? ECH83
  96. E130L in Triode mode
  97. class AB2 who's using it for hifi?
  98. Obscure radio tube
  99. another mingda
  100. tube hum in Aikido
  101. equivalent input impedance
  102. 6DG6GT "Magic Amp"
  103. Solen Fast Cap vs ASC film/oils in PS
  104. Tektronix transformers
  105. *very* basic plate resistance Q
  106. Yaqin MC-5881A amplifier improvements
  107. Tube design software
  108. More wasted space
  109. Radio tube guitar preamp
  110. PC Mount Novar Socket Suppliers
  111. Planning my first project
  112. Power Transformer leakage
  113. current sensing in series with anode resistors
  114. Please recommend a 9-pin dual triode = 417A
  115. Dynaco Pas 2
  116. Anyone have accurate charts for a KT90?
  117. Calling all Phono Preamp gurus, I'm looking for some plans
  118. Measuring Unknown Transformers
  119. Swinging choke vs std. choke in PS
  120. scope tests on a Heathkit A7E
  121. tube hum in a 6SN7 Aikido - is this weird?
  122. ECC807 preamp
  123. Ode to the 8416
  124. CCS 10M45 in Cathode of CF Driver
  125. Audionics help
  126. what 8-pin tubes would you suggest for an aikido preamp?
  127. KT88 tubes
  128. Any one tried these transformers?
  129. Williamson 6L6 Monoblocks (Finally)
  130. Master Volume preamp.. simple?
  131. ~2 watt SET decision
  132. retube order
  133. MC Riaa preamp help/opinions please
  134. WTB Fairchild 260 transformers
  135. Peter Millet amp
  136. 1946 Gibson BR-4 Amplifier tube question
  137. Power Regulator PCB's and Aikido parts
  138. A heater wiring DOH! moment??
  139. hum in fisher 800c phono section
  140. Aikido warm-up hum, resistor types, etc.
  141. Any of these tubes good for amps?
  142. Mini 98 El84 PP amplifier
  143. 1X6S33S=6X6S19P which one gives less impedance?
  144. schematic for 12.6 VDC heaters
  145. PP transformer for SE?? Help!
  146. 7-pin miniature tubes for audio?
  147. Tube Preamp as a Guitar Effect
  148. 6L6GT vs. EL34/6CA7 and WHY?
  149. Tube rectifier help
  150. Fender push pull amp... using one tube only.. is it dangerous?
  151. KT88 Lifetime estimation
  152. Adjustable distributed load discussion
  153. Thyratron voltage regulation
  154. switch-on, switch-off sequence for preamp/amp
  155. Found Meixing Amp schematic, sorta, would like some feedback
  156. Tube Voltage Regulator Flicker...
  157. Projects...How does one decide ?
  158. Best 6550's for the money....
  159. SMPS and tubes
  160. Looking for Eico 1030 manual/schematic
  161. 6AS7 OTL
  162. Gary Pimm's site down?
  163. 805 + 300b Amplifier Schematic
  164. Music Angel Amplifiers
  165. MM Phono stage (kit?) for tube newbie
  166. Russian tube dealer?
  167. STA1 + amp vs K-12M
  168. cheap ebay KT88 amp
  169. Tubes at low +B...
  170. Converting a yarland amp to drive headphones
  171. Starting a component system
  172. Really elementary question about caps.
  173. Tube newbie with Scott 299B
  174. 12AV7- 5965 Vs 12AY7
  175. PX25 tubes in a 300B Amp?
  176. help with a choke.
  177. 60Hz buzzing
  178. nuvistor bias with 18V ?
  179. ground bus for inputs on preamp - what's best?
  180. Voltage drop of various regulators in dc regulated power supply for preamp
  181. Does anyone recognise this tube amp?
  182. Entry level tube amp
  183. Anyone build/use 6BG6G?
  184. KT-77 Blues
  185. Dynaco Information MArk II Required
  186. tube test numbers - what do they mean?
  187. foolish notion, 12GN7 model?
  188. First-Timer Doubts: K-12 or Gainclone?
  189. Eico ST70 Rebuild / Upgrade
  190. More power in this
  191. Help modifiying schematic
  192. Simple Variable Tube Power Supply
  193. bias voltage vs bias current
  194. All the Bias options
  195. 6N6G looks like a great audio tube. . .
  196. Variable bias
  197. Tube amp on a budget
  198. tung sol
  199. How cool is tube deep cooling?
  200. Modified Fender Deluxe - Constant Current Phase Splitter
  201. 12B4 Equivalents?
  202. KT88 pp triode control grid resistor????
  203. Duncan Amps spice model docs...
  204. Hum in Legend amp
  205. Which do you prefer - EL84 UL PP or EL34 Triode PP - and why?
  206. Mullard high speed tester
  207. Joining two NCT transformers
  208. Stereo Driver PCB for PP Amp (EL34/KT88)?
  209. Tube Integrated Amp Kit Project
  210. 866A transient over-current capability?
  211. 6HS8 tubes for volume control
  212. cathode for plate ccs ?
  213. Broken Tube pin guides
  214. I need a 120v ct transformer... Where to look?
  215. Best production EL34?
  216. 6DJ8 or 12AT7
  217. 6L6 Single Ended Flea Amp?
  218. Se Tranny used on Parafeed!!!
  219. Hammond 270 series power transformer?
  220. 6aq5.......6v6.......
  221. 6N1 substitution with 6922
  222. driving 845 push-pull with a signal from a 300B SE stage
  223. Recommend a schematic for a Moving Coil head amp?
  224. Tube Buffer 6J1 / 5654 (6AK5)
  225. question about 6Av5ga tubes
  226. Toroidal SE transformers
  227. Calling MR. Tubelab! 6W6GT?
  228. Triode Trick
  229. SE 300B or PP KT88 amps?
  230. perhaps an INSANE query...
  231. Possible to estimate transformer specs?
  232. 9 pin replacement sockets
  233. Bench PSU
  234. Need help to make a correct 83 (merc.vapor.rect) SS replacement.
  235. Joke of the day
  236. $300 tube amp budget. Which Amp??
  237. Simple Linestage for 27 or 1H5?
  238. Foreplay III pre amp
  239. Fixing this 100TH
  240. I have some 5654
  241. Multisegment capacitor replacement help.
  242. Amplifer calculation
  243. Auto Bias?
  244. Se KT88 with Quad ESL
  245. Parts from Salvage
  246. power supply question.... too many Volts?
  247. Heathkit A7E Conversion to Guitar
  248. Now wouldn’t this make an awesome monoblock.
  249. Please,help me for schematics!!
  250. Kofi Annan in: "Open for Suggestion"

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