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  1. 230 VAC to 2*140 VAC transformer - 20VA
  2. Re gettering?
  3. Distortion rise on OPT
  4. How to build a transconductance tester for small driver tubes?
  5. Musical Fidelity X-10D Cap Mod
  6. 6N3 & 6E2 tubes.
  7. help with local nfb
  8. What should I build
  9. leak st20
  10. Wright Audio WPA 3.5 Humpot & schematics
  11. the old light bulb trick
  12. Dynaco ST70 KIT - your opinion please
  13. Wire for tubes using a plate cap?
  14. Lundahl LL1660 OPT Franks 6SN7 linestage
  15. GU-50 PP + 10k:16-8-4 Ohm ,20w OPT..what is the best to do?
  16. Tomiko 10k PP transformer?
  17. Powerdrive for higher grid wattage A2 transmitter tubes
  18. Marantz Model 5 Amps and Model Seven Preamp
  19. How to calculate output transformers
  20. Grounding considerations with external PS
  21. Cathodyne fet buffered balanced line out
  22. 807pp + input phase splitter
  23. leak st 20
  24. Questions about Champ mods, NF loop and more
  25. Does anyone know what this is!..???
  26. Thought Exercise: Submini Circlotron OTL Amp
  27. Preamp Grounding PCB
  28. Manley 440: Tubes red cherry after replacing old tubes with new ones
  29. EL95 Parallel Push Pull design
  30. What is the ideal low-noise heater power for high-power output tubes?
  31. Beijing 6N6T
  32. Tube recomedations for my first tube amp
  33. Tube Load Lines and B+
  34. Hybrid rectifier possible in PSUD?
  35. Hickok calibration
  36. Bias voltage slower to come up
  37. Can You Reccommend a 6922 tube?
  38. Miniblok Resistor Parameter Modulation using Pots
  39. gm70 driver tube tests
  40. 300B Globe physical dimensions
  41. DIY Fisher 800b into a mic pre
  42. OPT Modification Question-Help please?
  43. Cant find origin
  44. Fixing Sneaky Oscillation in P-P Amplifiers
  45. fu-29 Audioromy
  46. Almarro A205A as experimentation platform
  47. Thoughts on layout and potential for improvements
  48. What is the difference between "rectifier tubes" and "power tubes"
  49. uTracer...
  50. EL84/UL84 single valve amp
  51. Mic preamp - strange high frequency roll off problem
  52. Tissbury audio
  53. midification to srpp preamplifier input voltage
  54. DHT SE amp with ultrapath
  55. Tube mic preamp problem
  56. Output transformer: reasons for destruction?
  57. Bewitch KT88
  58. SE OPT Wiring
  59. maggie 185 to stereo guitar amp?
  60. Budget 300b tubes recommendations
  61. Hum problem through one channel
  62. Audio Research LS22 DIY
  63. 300V Tube Power Supply From 120VAC Without Rectifier?
  64. NOS Tube: Black Spot on Getter Flashing? Help
  65. FET Source Follower Distortion
  66. TUBE/MOSFET/BJT hibrid amp
  67. PYE Black Box amplifier
  68. Tube tester
  69. what OPT for 211 parallel SE amp?
  70. Opinions for 6550 bias.
  71. 832A as a Single Ended Tetrode Amp?
  72. DCPP - "Engineer's Amplifier" : Need a bit of help
  73. quicky rebuild 6v6 to 807
  74. Old fire bottles.
  75. Regulated Power Supply using 6550
  76. GU50 SE vs 300B SE tube amp??
  77. Help with voltages
  78. New to valves & this forum.
  79. new amp 2a3 pp
  80. Telefunken EL153 SE circuity
  81. RH 84 Variation: Direct Coupled Pentode
  82. Single Transformer, two valve rectifiers
  83. Capacitors for Radio Frequency Amlifier and Converter Oscillator Tubes
  84. Tube Screening Cans
  85. PSU grounding
  86. 6AX4GT TV damper
  87. plate on chinese 6L6 red on one side
  88. FM stereo decoder
  89. Under the Christmas Tree - Valve Amplifiers 4th Ed.
  90. Using those dern 1625 tubes: a simple SEP amplifier
  91. Pairs of resistors in opposite directions
  92. 45 spice model
  93. APEX 460 Tube mic modification
  94. EL84 and 6BQ5 are Same?
  95. Simple hybrid amplifier (35W/8Ohm)
  96. Yaqin mc 10l or qinpu 6000 mkii
  97. Reported attack site?
  98. LCR RIAA Phono with DHTs
  99. New Here -Would Like to Build
  100. 12E1 push pull poweramp
  101. marantz model 9
  102. I would appreciate some helpfull advice from Aikido builders
  103. Dynaco ST70 big Snorting noise.
  104. Good Soft Distortion
  105. magnavox 8301 revamp, need's a second look
  106. Circuit or schematic for current source of 7.5mA
  107. Sakuma's bleeder tubes and series connected transfomers
  108. Tube measurement
  109. adding tone control to SE 6v6 amp
  110. Easy Little 6L6 SE
  111. knight KA-55
  112. Hum in tube amp
  113. Lundahl LL1660 10 mA Alt V
  114. 12au7 valve preamp (again?)
  115. Simple DC heating question
  116. 6146B?
  117. Reduce gain on power amp?
  118. ES9023 DAC(subbu) + Tube Preamp with Remote and R2R volume control(Danzup)
  119. AC heaters question
  120. Anyone tried this Mcintosh c22 knock off.
  121. Help me to find pins for tube socket
  122. HT delay pcb...
  123. Power supply, heater questions...
  124. Heathkit AA-151, to separate pre-amp advise needed?
  125. grounding
  126. 2 Stage GM-70 amp in A2... possible?
  127. GlassWare Janus Shunt Rectifier Tube Swap
  128. Schematics
  129. SE 6B4G driver tube options?
  130. seeking datasheet of 6J2B-V in english
  131. Nailing Hum in my Phono Stage
  132. Shaving voltage off HV supply?
  133. LEAK T12 and POINT ONE - worth having ?
  134. Quicksilvers Mid Mono Schematic?
  135. Russian & East European Tube Factory Logos
  136. Lampizator Channel
  137. RIAA triode or pentode
  138. Cute Little Tube Oscilloscope, Thought I'd share.
  139. Is it really possible to deliver 2W into 40 ohms with an SET ?
  140. se
  141. Connecting Two Amps to Common Input
  142. Wiring Aikido using LSA/HPA switch
  143. Most exotic SET power amplifier
  144. Help with rogers cadet 3 integrated
  145. Opamps for servos in tube amps - Christmas gift from LT, 12-12-12!
  146. tube amp hum........normal or suggested fix?
  147. Building a beast: Stereo EL84 auto bias PP tube amp
  148. Becker Brescia auto radio
  149. Double feedback pentode Power Stage
  150. Anyone Using Guiguang 300b tubes?
  151. Where to get Audio Note Gaku-On service manual?
  152. Sanity Check - Input Transformer Overshoot
  153. TOA HA-355 vintage tube PA amp schematic
  154. EL34 PushPull UL Amp
  155. 6L6G emission too high
  156. Need help designing BIAS circuit for old Bell amp
  157. Heathkit A-5A 6L6 PP Integrated Amp
  158. Where to put the meter
  159. Radii GS-40pp
  160. Concept dilemma (pre/pwr/spud content)
  161. What to do with these Eimac tubes?
  162. Driving 211 with VT25 or EL34?
  163. DIY AMP start project - Help choosing one
  164. Pilot 248B Amp with weak channel
  165. 6H30 VA stage?
  166. What is the best way to connect DC filaments?
  167. suggestions for a parallel feed 45 amp?
  168. Counterpoint SA 5.1 repairs
  169. The Morgan Jones mini tube headphone Amplifier
  170. Borbely headphone amp
  171. Found An Amplifier In My Basement I'd Forgotten About & Learn It's Sought After
  172. Floating OPT oscilloscope measuraments
  173. I Wasn't Away That Long, What's WIth The Price Hikes On All My Old Toys?
  174. Channel voltage mismatch
  175. OS70/1750 datasheets
  176. Beautiful Chassis
  177. 6A4, 46 and 47...excellent sound tubes !!!!
  178. Is it Overkill to use Duelund Caps in Power Stage (Counterpoint SA-5.1)
  179. Quicksilver M135 Schematic?
  180. recognize this old amp?
  181. grey fogging inside 6sn7
  182. Point to point or pcb?
  183. Quad query
  184. Fixing a Velleman K4040 - Buzz HIss Crackle Blown Tubes
  185. Found Original Genalex 12AX7..Need Advice..
  186. OPT power rating and amplifier power
  187. 6BG6-GA
  188. EL84 driving EL84 SET with fixed bias
  189. P2P 6CG7 Input Buffer
  190. 865 in triode mode...anyone ever tried it?
  191. PP KT88 Amp Low frequency Ringing
  192. World audio designs kel34
  193. Glassware Audio Design
  194. 2A3 mounted horizontally
  195. from tube amp to fm reciever
  196. diy tube amp
  197. Cary 805ae xlr option
  198. ST-70 mono makeover
  199. breaking in audio capacitors
  200. Question about 6V6GT amp schematic
  201. Sherwood Schematic
  202. Ever hear of a D7L1 or D7L3 YR7 tube?
  203. Psvane Replica RCA 2A3 tube - WR2A3
  204. 845 Driver Circuit
  205. ADJUSTABLE BIAS MOD KIT
  206. Gold Lion B749 12au7 Thoughts?
  207. Siliconray SRK 09 tube amp kit help
  208. Quantum minstrel
  209. Does anyone know how John Lee Hooker recorded this? (1949)
  210. Please Identify these black capacitors.
  211. New Tubes too silent (6P15P)
  212. best sounding & value amp kits/designs?
  213. Custom Woodwork For Tube Amp
  214. Tube 2E22 in triode mode
  215. Has anyone built an OTL amp with switch mode power supplies.
  216. Altec 15067 transformers
  217. Some interesting findings with transformers
  218. Bogen KO-60 Output Iron
  219. What would you do with Scott 222D IRON?
  220. Aikido vs CCDA
  221. wiring color code
  222. Maverick Audio TubeMagic D1 DAC
  223. Is one gz34 enough
  224. Edcor OPT opinions
  225. mengyue mini/ming da el34b
  226. I need a tube buffer circuit using a 12au7
  227. Stereo Amplifier Wood Enclosure
  228. What is the theoretical advantage of direct heated triodes?
  229. 6AS6 is useful for audio ?
  230. GM-70 design approach
  231. Ultimate emotion core material ( types of silicon steel , Permalloy or Amorphous etc)
  232. Looking to build my first tube amplifier
  233. Tube/SS opamp
  234. Biasing 6CA7/EL34 in Luxman LX33
  235. John Broskie MIA again?
  236. combine filament winding for rectifier
  237. HYBRID TUBE CFP
  238. 9302 Maggie Rebuild
  239. Pyramid-IX monoblock, 200W from 4x GU-50
  240. Suggestions of phono stage to build
  241. Do power transformers affect sound quality?
  242. Help with a Velleman K4040 ...
  243. Capacitor replacement confusion
  244. RCA PA Amplifer, Input Transformers
  245. Channel imbalance Xiang Sheng DAC-01
  246. ARC M100s
  247. pros & cons of current mirror to balance a push-pull ?
  248. Wright Audio WLA10 help needed
  249. The Best tube/valve sound!?
  250. Mcintosh MC1000 and Ming Da MC300-PRE

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