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  1. Output transformer: reasons for destruction?
  2. Bewitch KT88
  3. SE OPT Wiring
  4. maggie 185 to stereo guitar amp?
  5. Budget 300b tubes recommendations
  6. Hum problem through one channel
  7. Audio Research LS22 DIY
  8. 300V Tube Power Supply From 120VAC Without Rectifier?
  9. NOS Tube: Black Spot on Getter Flashing? Help
  10. FET Source Follower Distortion
  11. TUBE/MOSFET/BJT hibrid amp
  12. PYE Black Box amplifier
  13. Tube tester
  14. what OPT for 211 parallel SE amp?
  15. Opinions for 6550 bias.
  16. 832A as a Single Ended Tetrode Amp?
  17. DCPP - "Engineer's Amplifier" : Need a bit of help
  18. quicky rebuild 6v6 to 807
  19. Old fire bottles.
  20. Regulated Power Supply using 6550
  21. GU50 SE vs 300B SE tube amp??
  22. Help with voltages
  23. New to valves & this forum.
  24. new amp 2a3 pp
  25. Telefunken EL153 SE circuity
  26. RH 84 Variation: Direct Coupled Pentode
  27. Single Transformer, two valve rectifiers
  28. Capacitors for Radio Frequency Amlifier and Converter Oscillator Tubes
  29. Tube Screening Cans
  30. PSU grounding
  31. 6AX4GT TV damper
  32. plate on chinese 6L6 red on one side
  33. FM stereo decoder
  34. Under the Christmas Tree - Valve Amplifiers 4th Ed.
  35. Using those dern 1625 tubes: a simple SEP amplifier
  36. Pairs of resistors in opposite directions
  37. 45 spice model
  38. APEX 460 Tube mic modification
  39. EL84 and 6BQ5 are Same?
  40. Simple hybrid amplifier (35W/8Ohm)
  41. Yaqin mc 10l or qinpu 6000 mkii
  42. Reported attack site?
  43. LCR RIAA Phono with DHTs
  44. New Here -Would Like to Build
  45. 12E1 push pull poweramp
  46. marantz model 9
  47. I would appreciate some helpfull advice from Aikido builders
  48. Dynaco ST70 big Snorting noise.
  49. Good Soft Distortion
  50. magnavox 8301 revamp, need's a second look
  51. Circuit or schematic for current source of 7.5mA
  52. Sakuma's bleeder tubes and series connected transfomers
  53. Tube measurement
  54. adding tone control to SE 6v6 amp
  55. Easy Little 6L6 SE
  56. knight KA-55
  57. Hum in tube amp
  58. Lundahl LL1660 10 mA Alt V
  59. 12au7 valve preamp (again?)
  60. Simple DC heating question
  61. 6146B?
  62. Reduce gain on power amp?
  63. ES9023 DAC(subbu) + Tube Preamp with Remote and R2R volume control(Danzup)
  64. AC heaters question
  65. Anyone tried this Mcintosh c22 knock off.
  66. Help me to find pins for tube socket
  67. HT delay pcb...
  68. Power supply, heater questions...
  69. Heathkit AA-151, to separate pre-amp advise needed?
  70. grounding
  71. 2 Stage GM-70 amp in A2... possible?
  72. GlassWare Janus Shunt Rectifier Tube Swap
  73. Schematics
  74. SE 6B4G driver tube options?
  75. seeking datasheet of 6J2B-V in english
  76. Nailing Hum in my Phono Stage
  77. Shaving voltage off HV supply?
  78. LEAK T12 and POINT ONE - worth having ?
  79. Quicksilvers Mid Mono Schematic?
  80. Russian & East European Tube Factory Logos
  81. Lampizator Channel
  82. RIAA triode or pentode
  83. Cute Little Tube Oscilloscope, Thought I'd share.
  84. Is it really possible to deliver 2W into 40 ohms with an SET ?
  85. se
  86. Connecting Two Amps to Common Input
  87. Wiring Aikido using LSA/HPA switch
  88. Most exotic SET power amplifier
  89. Help with rogers cadet 3 integrated
  90. Opamps for servos in tube amps - Christmas gift from LT, 12-12-12!
  91. tube amp hum........normal or suggested fix?
  92. Building a beast: Stereo EL84 auto bias PP tube amp
  93. Becker Brescia auto radio
  94. Double feedback pentode Power Stage
  95. Anyone Using Guiguang 300b tubes?
  96. Where to get Audio Note Gaku-On service manual?
  97. Sanity Check - Input Transformer Overshoot
  98. TOA HA-355 vintage tube PA amp schematic
  99. EL34 PushPull UL Amp
  100. 6L6G emission too high
  101. Need help designing BIAS circuit for old Bell amp
  102. Heathkit A-5A 6L6 PP Integrated Amp
  103. Where to put the meter
  104. Radii GS-40pp
  105. Concept dilemma (pre/pwr/spud content)
  106. What to do with these Eimac tubes?
  107. Driving 211 with VT25 or EL34?
  108. DIY AMP start project - Help choosing one
  109. Pilot 248B Amp with weak channel
  110. 6H30 VA stage?
  111. What is the best way to connect DC filaments?
  112. suggestions for a parallel feed 45 amp?
  113. Counterpoint SA 5.1 repairs
  114. The Morgan Jones mini tube headphone Amplifier
  115. Borbely headphone amp
  116. Found An Amplifier In My Basement I'd Forgotten About & Learn It's Sought After
  117. Floating OPT oscilloscope measuraments
  118. I Wasn't Away That Long, What's WIth The Price Hikes On All My Old Toys?
  119. Channel voltage mismatch
  120. OS70/1750 datasheets
  121. Beautiful Chassis
  122. 6A4, 46 and 47...excellent sound tubes !!!!
  123. Is it Overkill to use Duelund Caps in Power Stage (Counterpoint SA-5.1)
  124. Quicksilver M135 Schematic?
  125. recognize this old amp?
  126. grey fogging inside 6sn7
  127. Point to point or pcb?
  128. Quad query
  129. Fixing a Velleman K4040 - Buzz HIss Crackle Blown Tubes
  130. Found Original Genalex 12AX7..Need Advice..
  131. OPT power rating and amplifier power
  132. 6BG6-GA
  133. EL84 driving EL84 SET with fixed bias
  134. P2P 6CG7 Input Buffer
  135. 865 in triode mode...anyone ever tried it?
  136. PP KT88 Amp Low frequency Ringing
  137. World audio designs kel34
  138. Glassware Audio Design
  139. 2A3 mounted horizontally
  140. from tube amp to fm reciever
  141. diy tube amp
  142. Cary 805ae xlr option
  143. ST-70 mono makeover
  144. breaking in audio capacitors
  145. Question about 6V6GT amp schematic
  146. Sherwood Schematic
  147. Ever hear of a D7L1 or D7L3 YR7 tube?
  148. Psvane Replica RCA 2A3 tube - WR2A3
  149. 845 Driver Circuit
  150. ADJUSTABLE BIAS MOD KIT
  151. Gold Lion B749 12au7 Thoughts?
  152. Siliconray SRK 09 tube amp kit help
  153. Quantum minstrel
  154. Does anyone know how John Lee Hooker recorded this? (1949)
  155. Please Identify these black capacitors.
  156. New Tubes too silent (6P15P)
  157. best sounding & value amp kits/designs?
  158. Custom Woodwork For Tube Amp
  159. Tube 2E22 in triode mode
  160. Has anyone built an OTL amp with switch mode power supplies.
  161. Altec 15067 transformers
  162. Some interesting findings with transformers
  163. Bogen KO-60 Output Iron
  164. What would you do with Scott 222D IRON?
  165. Aikido vs CCDA
  166. wiring color code
  167. Maverick Audio TubeMagic D1 DAC
  168. Is one gz34 enough
  169. Edcor OPT opinions
  170. mengyue mini/ming da el34b
  171. I need a tube buffer circuit using a 12au7
  172. Stereo Amplifier Wood Enclosure
  173. What is the theoretical advantage of direct heated triodes?
  174. 6AS6 is useful for audio ?
  175. GM-70 design approach
  176. Ultimate emotion core material ( types of silicon steel , Permalloy or Amorphous etc)
  177. Looking to build my first tube amplifier
  178. Tube/SS opamp
  179. Biasing 6CA7/EL34 in Luxman LX33
  180. John Broskie MIA again?
  181. combine filament winding for rectifier
  182. HYBRID TUBE CFP
  183. 9302 Maggie Rebuild
  184. Pyramid-IX monoblock, 200W from 4x GU-50
  185. Suggestions of phono stage to build
  186. Do power transformers affect sound quality?
  187. Help with a Velleman K4040 ...
  188. Capacitor replacement confusion
  189. RCA PA Amplifer, Input Transformers
  190. Channel imbalance Xiang Sheng DAC-01
  191. ARC M100s
  192. pros & cons of current mirror to balance a push-pull ?
  193. Wright Audio WLA10 help needed
  194. The Best tube/valve sound!?
  195. Mcintosh MC1000 and Ming Da MC300-PRE
  196. Operating Modern 845s
  197. The Transcendent Sound Son of Beast OTL Master/Mod Thread.
  198. Neutralizing An Amplifier
  199. Stacked speakers driven by an SEP amp?
  200. Tube buffer suggestion for LM4702 amplifier?
  201. FWB Voltage Doubler with -Bias supply
  202. 500V SE pentode design
  203. single ended transformer driving 32ohm speaker
  204. uC based Tube Curve Tracer Kit - Experts Opinion ?
  205. 250K Attenuator
  206. Possible to drive PP EL34-triodes with a cathodyne phase-splitter?
  207. Daughters POD amp 13EM7 Pics
  208. Calculating Ripple Current with PSUD2
  209. Channel problem on 45 converted amp
  210. Want to make a tube preamp
  211. Marantz TC-5 choke value
  212. diference between schematics and pcb layout
  213. Would this work?
  214. Can old resistors go bad?
  215. Strange output tube behaviour
  216. Practical question: toroidal transformer / heater current / kt120
  217. Morgan Jones Power supply cap values
  218. Can use a ballast for a PSU??
  219. Looking for a OTL tube headphone amp design
  220. Relative Humidity Attenuating HF
  221. Parallel Output transformer question
  222. Need help to ID a tube...
  223. Modifications to Sennheiser VKS 203
  224. Onix SP3 integrated amp latest schematic
  225. Omit sp3 integrated amp latest schematic
  226. Help: Western Electric 102A Tube Datasheet and Test Settings
  227. Power and output transformer separated from amplifier
  228. discrete and simple VCCS
  229. heater wiring question
  230. What is the deal with Welborne Labs?
  231. Center Channel
  232. input stage problem help please!
  233. Tube Tips/Tricks for beginners
  234. Any skilled custom tube amplifier builders out there?
  235. Are these tubes really matched?
  236. Single Ended Amp
  237. Mighty Midget Problems
  238. Run the tube stuff in your car
  239. Jackson 648 test for 6973
  240. Space-charge tetrodes in Inverted Mode
  241. choosing input valve
  242. Rectifier characteristics
  243. Glass-ware?
  244. 5751 Mil spec tubes vrs 12AX7
  245. 47 pentode...fabulous sound !!!!
  246. Aikido preamp transformer question
  247. 40's tube receiver question
  248. W5m transformer
  249. Dual voltage PS filtering.
  250. OD3 150V tube regulator

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