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  1. uTracer...
  2. EL84/UL84 single valve amp
  3. Mic preamp - strange high frequency roll off problem
  4. Tissbury audio
  5. midification to srpp preamplifier input voltage
  6. DHT SE amp with ultrapath
  7. Tube mic preamp problem
  8. Output transformer: reasons for destruction?
  9. Bewitch KT88
  10. SE OPT Wiring
  11. maggie 185 to stereo guitar amp?
  12. Budget 300b tubes recommendations
  13. Hum problem through one channel
  14. Audio Research LS22 DIY
  15. 300V Tube Power Supply From 120VAC Without Rectifier?
  16. NOS Tube: Black Spot on Getter Flashing? Help
  17. FET Source Follower Distortion
  18. TUBE/MOSFET/BJT hibrid amp
  19. PYE Black Box amplifier
  20. Tube tester
  21. what OPT for 211 parallel SE amp?
  22. Opinions for 6550 bias.
  23. 832A as a Single Ended Tetrode Amp?
  24. DCPP - "Engineer's Amplifier" : Need a bit of help
  25. quicky rebuild 6v6 to 807
  26. Old fire bottles.
  27. Regulated Power Supply using 6550
  28. GU50 SE vs 300B SE tube amp??
  29. Help with voltages
  30. New to valves & this forum.
  31. new amp 2a3 pp
  32. Telefunken EL153 SE circuity
  33. RH 84 Variation: Direct Coupled Pentode
  34. Single Transformer, two valve rectifiers
  35. Capacitors for Radio Frequency Amlifier and Converter Oscillator Tubes
  36. Tube Screening Cans
  37. PSU grounding
  38. 6AX4GT TV damper
  39. plate on chinese 6L6 red on one side
  40. FM stereo decoder
  41. Under the Christmas Tree - Valve Amplifiers 4th Ed.
  42. Using those dern 1625 tubes: a simple SEP amplifier
  43. Pairs of resistors in opposite directions
  44. 45 spice model
  45. APEX 460 Tube mic modification
  46. EL84 and 6BQ5 are Same?
  47. Simple hybrid amplifier (35W/8Ohm)
  48. Yaqin mc 10l or qinpu 6000 mkii
  49. Reported attack site?
  50. LCR RIAA Phono with DHTs
  51. New Here -Would Like to Build
  52. 12E1 push pull poweramp
  53. marantz model 9
  54. I would appreciate some helpfull advice from Aikido builders
  55. Dynaco ST70 big Snorting noise.
  56. Good Soft Distortion
  57. magnavox 8301 revamp, need's a second look
  58. Circuit or schematic for current source of 7.5mA
  59. Sakuma's bleeder tubes and series connected transfomers
  60. Tube measurement
  61. adding tone control to SE 6v6 amp
  62. Easy Little 6L6 SE
  63. knight KA-55
  64. Hum in tube amp
  65. Lundahl LL1660 10 mA Alt V
  66. 12au7 valve preamp (again?)
  67. Simple DC heating question
  68. 6146B?
  69. Reduce gain on power amp?
  70. ES9023 DAC(subbu) + Tube Preamp with Remote and R2R volume control(Danzup)
  71. AC heaters question
  72. Anyone tried this Mcintosh c22 knock off.
  73. Help me to find pins for tube socket
  74. HT delay pcb...
  75. Power supply, heater questions...
  76. Heathkit AA-151, to separate pre-amp advise needed?
  77. grounding
  78. 2 Stage GM-70 amp in A2... possible?
  79. GlassWare Janus Shunt Rectifier Tube Swap
  80. Schematics
  81. SE 6B4G driver tube options?
  82. seeking datasheet of 6J2B-V in english
  83. Nailing Hum in my Phono Stage
  84. Shaving voltage off HV supply?
  85. LEAK T12 and POINT ONE - worth having ?
  86. Quicksilvers Mid Mono Schematic?
  87. Russian & East European Tube Factory Logos
  88. Lampizator Channel
  89. RIAA triode or pentode
  90. Cute Little Tube Oscilloscope, Thought I'd share.
  91. Is it really possible to deliver 2W into 40 ohms with an SET ?
  92. se
  93. Connecting Two Amps to Common Input
  94. Wiring Aikido using LSA/HPA switch
  95. Most exotic SET power amplifier
  96. Help with rogers cadet 3 integrated
  97. Opamps for servos in tube amps - Christmas gift from LT, 12-12-12!
  98. tube amp hum........normal or suggested fix?
  99. Building a beast: Stereo EL84 auto bias PP tube amp
  100. Becker Brescia auto radio
  101. Double feedback pentode Power Stage
  102. Anyone Using Guiguang 300b tubes?
  103. Where to get Audio Note Gaku-On service manual?
  104. Sanity Check - Input Transformer Overshoot
  105. TOA HA-355 vintage tube PA amp schematic
  106. EL34 PushPull UL Amp
  107. 6L6G emission too high
  108. Need help designing BIAS circuit for old Bell amp
  109. Heathkit A-5A 6L6 PP Integrated Amp
  110. Where to put the meter
  111. Radii GS-40pp
  112. Concept dilemma (pre/pwr/spud content)
  113. What to do with these Eimac tubes?
  114. Driving 211 with VT25 or EL34?
  115. DIY AMP start project - Help choosing one
  116. Pilot 248B Amp with weak channel
  117. 6H30 VA stage?
  118. What is the best way to connect DC filaments?
  119. suggestions for a parallel feed 45 amp?
  120. Counterpoint SA 5.1 repairs
  121. The Morgan Jones mini tube headphone Amplifier
  122. Borbely headphone amp
  123. Found An Amplifier In My Basement I'd Forgotten About & Learn It's Sought After
  124. Floating OPT oscilloscope measuraments
  125. I Wasn't Away That Long, What's WIth The Price Hikes On All My Old Toys?
  126. Channel voltage mismatch
  127. OS70/1750 datasheets
  128. Beautiful Chassis
  129. 6A4, 46 and 47...excellent sound tubes !!!!
  130. Is it Overkill to use Duelund Caps in Power Stage (Counterpoint SA-5.1)
  131. Quicksilver M135 Schematic?
  132. recognize this old amp?
  133. grey fogging inside 6sn7
  134. Point to point or pcb?
  135. Quad query
  136. Fixing a Velleman K4040 - Buzz HIss Crackle Blown Tubes
  137. Found Original Genalex 12AX7..Need Advice..
  138. OPT power rating and amplifier power
  139. 6BG6-GA
  140. EL84 driving EL84 SET with fixed bias
  141. P2P 6CG7 Input Buffer
  142. 865 in triode mode...anyone ever tried it?
  143. PP KT88 Amp Low frequency Ringing
  144. World audio designs kel34
  145. Glassware Audio Design
  146. 2A3 mounted horizontally
  147. from tube amp to fm reciever
  148. diy tube amp
  149. Cary 805ae xlr option
  150. ST-70 mono makeover
  151. breaking in audio capacitors
  152. Question about 6V6GT amp schematic
  153. Sherwood Schematic
  154. Ever hear of a D7L1 or D7L3 YR7 tube?
  155. Psvane Replica RCA 2A3 tube - WR2A3
  156. 845 Driver Circuit
  157. ADJUSTABLE BIAS MOD KIT
  158. Gold Lion B749 12au7 Thoughts?
  159. Siliconray SRK 09 tube amp kit help
  160. Quantum minstrel
  161. Does anyone know how John Lee Hooker recorded this? (1949)
  162. Please Identify these black capacitors.
  163. New Tubes too silent (6P15P)
  164. best sounding & value amp kits/designs?
  165. Custom Woodwork For Tube Amp
  166. Tube 2E22 in triode mode
  167. Has anyone built an OTL amp with switch mode power supplies.
  168. Altec 15067 transformers
  169. Some interesting findings with transformers
  170. Bogen KO-60 Output Iron
  171. What would you do with Scott 222D IRON?
  172. Aikido vs CCDA
  173. wiring color code
  174. Maverick Audio TubeMagic D1 DAC
  175. Is one gz34 enough
  176. Edcor OPT opinions
  177. mengyue mini/ming da el34b
  178. I need a tube buffer circuit using a 12au7
  179. Stereo Amplifier Wood Enclosure
  180. What is the theoretical advantage of direct heated triodes?
  181. 6AS6 is useful for audio ?
  182. GM-70 design approach
  183. Ultimate emotion core material ( types of silicon steel , Permalloy or Amorphous etc)
  184. Looking to build my first tube amplifier
  185. Tube/SS opamp
  186. Biasing 6CA7/EL34 in Luxman LX33
  187. John Broskie MIA again?
  188. combine filament winding for rectifier
  189. HYBRID TUBE CFP
  190. 9302 Maggie Rebuild
  191. Pyramid-IX monoblock, 200W from 4x GU-50
  192. Suggestions of phono stage to build
  193. Do power transformers affect sound quality?
  194. Help with a Velleman K4040 ...
  195. Capacitor replacement confusion
  196. RCA PA Amplifer, Input Transformers
  197. Channel imbalance Xiang Sheng DAC-01
  198. ARC M100s
  199. pros & cons of current mirror to balance a push-pull ?
  200. Wright Audio WLA10 help needed
  201. The Best tube/valve sound!?
  202. Mcintosh MC1000 and Ming Da MC300-PRE
  203. Operating Modern 845s
  204. The Transcendent Sound Son of Beast OTL Master/Mod Thread.
  205. Neutralizing An Amplifier
  206. Stacked speakers driven by an SEP amp?
  207. Tube buffer suggestion for LM4702 amplifier?
  208. FWB Voltage Doubler with -Bias supply
  209. 500V SE pentode design
  210. single ended transformer driving 32ohm speaker
  211. uC based Tube Curve Tracer Kit - Experts Opinion ?
  212. 250K Attenuator
  213. Possible to drive PP EL34-triodes with a cathodyne phase-splitter?
  214. Daughters POD amp 13EM7 Pics
  215. Calculating Ripple Current with PSUD2
  216. Channel problem on 45 converted amp
  217. Want to make a tube preamp
  218. Marantz TC-5 choke value
  219. diference between schematics and pcb layout
  220. Would this work?
  221. Can old resistors go bad?
  222. Strange output tube behaviour
  223. Practical question: toroidal transformer / heater current / kt120
  224. Morgan Jones Power supply cap values
  225. Can use a ballast for a PSU??
  226. Looking for a OTL tube headphone amp design
  227. Relative Humidity Attenuating HF
  228. Parallel Output transformer question
  229. Need help to ID a tube...
  230. Modifications to Sennheiser VKS 203
  231. Onix SP3 integrated amp latest schematic
  232. Omit sp3 integrated amp latest schematic
  233. Help: Western Electric 102A Tube Datasheet and Test Settings
  234. Power and output transformer separated from amplifier
  235. discrete and simple VCCS
  236. heater wiring question
  237. What is the deal with Welborne Labs?
  238. Center Channel
  239. input stage problem help please!
  240. Tube Tips/Tricks for beginners
  241. Any skilled custom tube amplifier builders out there?
  242. Are these tubes really matched?
  243. Single Ended Amp
  244. Mighty Midget Problems
  245. Run the tube stuff in your car
  246. Jackson 648 test for 6973
  247. Space-charge tetrodes in Inverted Mode
  248. choosing input valve
  249. Rectifier characteristics
  250. Glass-ware?

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