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  1. 300B Globe physical dimensions
  2. DIY Fisher 800b into a mic pre
  3. OPT Modification Question-Help please?
  4. Cant find origin
  5. Fixing Sneaky Oscillation in P-P Amplifiers
  6. fu-29 Audioromy
  7. Almarro A205A as experimentation platform
  8. Thoughts on layout and potential for improvements
  9. What is the difference between "rectifier tubes" and "power tubes"
  10. uTracer...
  11. EL84/UL84 single valve amp
  12. Mic preamp - strange high frequency roll off problem
  13. Tissbury audio
  14. midification to srpp preamplifier input voltage
  15. DHT SE amp with ultrapath
  16. Tube mic preamp problem
  17. Output transformer: reasons for destruction?
  18. Bewitch KT88
  19. SE OPT Wiring
  20. maggie 185 to stereo guitar amp?
  21. Budget 300b tubes recommendations
  22. Hum problem through one channel
  23. Audio Research LS22 DIY
  24. 300V Tube Power Supply From 120VAC Without Rectifier?
  25. NOS Tube: Black Spot on Getter Flashing? Help
  26. FET Source Follower Distortion
  27. TUBE/MOSFET/BJT hibrid amp
  28. PYE Black Box amplifier
  29. Tube tester
  30. what OPT for 211 parallel SE amp?
  31. Opinions for 6550 bias.
  32. 832A as a Single Ended Tetrode Amp?
  33. DCPP - "Engineer's Amplifier" : Need a bit of help
  34. quicky rebuild 6v6 to 807
  35. Old fire bottles.
  36. Regulated Power Supply using 6550
  37. GU50 SE vs 300B SE tube amp??
  38. Help with voltages
  39. New to valves & this forum.
  40. new amp 2a3 pp
  41. Telefunken EL153 SE circuity
  42. RH 84 Variation: Direct Coupled Pentode
  43. Single Transformer, two valve rectifiers
  44. Capacitors for Radio Frequency Amlifier and Converter Oscillator Tubes
  45. Tube Screening Cans
  46. PSU grounding
  47. 6AX4GT TV damper
  48. plate on chinese 6L6 red on one side
  49. FM stereo decoder
  50. Under the Christmas Tree - Valve Amplifiers 4th Ed.
  51. Using those dern 1625 tubes: a simple SEP amplifier
  52. Pairs of resistors in opposite directions
  53. 45 spice model
  54. APEX 460 Tube mic modification
  55. EL84 and 6BQ5 are Same?
  56. Simple hybrid amplifier (35W/8Ohm)
  57. Yaqin mc 10l or qinpu 6000 mkii
  58. Reported attack site?
  59. LCR RIAA Phono with DHTs
  60. New Here -Would Like to Build
  61. 12E1 push pull poweramp
  62. marantz model 9
  63. I would appreciate some helpfull advice from Aikido builders
  64. Dynaco ST70 big Snorting noise.
  65. Good Soft Distortion
  66. magnavox 8301 revamp, need's a second look
  67. Circuit or schematic for current source of 7.5mA
  68. Sakuma's bleeder tubes and series connected transfomers
  69. Tube measurement
  70. adding tone control to SE 6v6 amp
  71. Easy Little 6L6 SE
  72. knight KA-55
  73. Hum in tube amp
  74. Lundahl LL1660 10 mA Alt V
  75. 12au7 valve preamp (again?)
  76. Simple DC heating question
  77. 6146B?
  78. Reduce gain on power amp?
  79. ES9023 DAC(subbu) + Tube Preamp with Remote and R2R volume control(Danzup)
  80. AC heaters question
  81. Anyone tried this Mcintosh c22 knock off.
  82. Help me to find pins for tube socket
  83. HT delay pcb...
  84. Power supply, heater questions...
  85. Heathkit AA-151, to separate pre-amp advise needed?
  86. grounding
  87. 2 Stage GM-70 amp in A2... possible?
  88. GlassWare Janus Shunt Rectifier Tube Swap
  89. Schematics
  90. SE 6B4G driver tube options?
  91. seeking datasheet of 6J2B-V in english
  92. Nailing Hum in my Phono Stage
  93. Shaving voltage off HV supply?
  94. LEAK T12 and POINT ONE - worth having ?
  95. Quicksilvers Mid Mono Schematic?
  96. Russian & East European Tube Factory Logos
  97. Lampizator Channel
  98. RIAA triode or pentode
  99. Cute Little Tube Oscilloscope, Thought I'd share.
  100. Is it really possible to deliver 2W into 40 ohms with an SET ?
  101. se
  102. Connecting Two Amps to Common Input
  103. Wiring Aikido using LSA/HPA switch
  104. Most exotic SET power amplifier
  105. Help with rogers cadet 3 integrated
  106. Opamps for servos in tube amps - Christmas gift from LT, 12-12-12!
  107. tube amp hum........normal or suggested fix?
  108. Becker Brescia auto radio
  109. Double feedback pentode Power Stage
  110. Anyone Using Guiguang 300b tubes?
  111. Where to get Audio Note Gaku-On service manual?
  112. Sanity Check - Input Transformer Overshoot
  113. TOA HA-355 vintage tube PA amp schematic
  114. EL34 PushPull UL Amp
  115. 6L6G emission too high
  116. Need help designing BIAS circuit for old Bell amp
  117. Heathkit A-5A 6L6 PP Integrated Amp
  118. Where to put the meter
  119. Radii GS-40pp
  120. Concept dilemma (pre/pwr/spud content)
  121. What to do with these Eimac tubes?
  122. Driving 211 with VT25 or EL34?
  123. DIY AMP start project - Help choosing one
  124. Pilot 248B Amp with weak channel
  125. 6H30 VA stage?
  126. What is the best way to connect DC filaments?
  127. suggestions for a parallel feed 45 amp?
  128. Counterpoint SA 5.1 repairs
  129. The Morgan Jones mini tube headphone Amplifier
  130. Borbely headphone amp
  131. Found An Amplifier In My Basement I'd Forgotten About & Learn It's Sought After
  132. Floating OPT oscilloscope measuraments
  133. I Wasn't Away That Long, What's WIth The Price Hikes On All My Old Toys?
  134. Channel voltage mismatch
  135. OS70/1750 datasheets
  136. Beautiful Chassis
  137. 6A4, 46 and 47...excellent sound tubes !!!!
  138. Is it Overkill to use Duelund Caps in Power Stage (Counterpoint SA-5.1)
  139. Quicksilver M135 Schematic?
  140. recognize this old amp?
  141. grey fogging inside 6sn7
  142. Point to point or pcb?
  143. Quad query
  144. Fixing a Velleman K4040 - Buzz HIss Crackle Blown Tubes
  145. Found Original Genalex 12AX7..Need Advice..
  146. OPT power rating and amplifier power
  147. 6BG6-GA
  148. EL84 driving EL84 SET with fixed bias
  149. P2P 6CG7 Input Buffer
  150. 865 in triode mode...anyone ever tried it?
  151. PP KT88 Amp Low frequency Ringing
  152. World audio designs kel34
  153. Glassware Audio Design
  154. 2A3 mounted horizontally
  155. from tube amp to fm reciever
  156. diy tube amp
  157. Cary 805ae xlr option
  158. ST-70 mono makeover
  159. breaking in audio capacitors
  160. Question about 6V6GT amp schematic
  161. Sherwood Schematic
  162. Ever hear of a D7L1 or D7L3 YR7 tube?
  163. Psvane Replica RCA 2A3 tube - WR2A3
  164. 845 Driver Circuit
  165. ADJUSTABLE BIAS MOD KIT
  166. Gold Lion B749 12au7 Thoughts?
  167. Siliconray SRK 09 tube amp kit help
  168. Quantum minstrel
  169. Does anyone know how John Lee Hooker recorded this? (1949)
  170. Please Identify these black capacitors.
  171. New Tubes too silent (6P15P)
  172. best sounding & value amp kits/designs?
  173. Custom Woodwork For Tube Amp
  174. Tube 2E22 in triode mode
  175. Has anyone built an OTL amp with switch mode power supplies.
  176. Altec 15067 transformers
  177. Some interesting findings with transformers
  178. Bogen KO-60 Output Iron
  179. What would you do with Scott 222D IRON?
  180. Aikido vs CCDA
  181. wiring color code
  182. Maverick Audio TubeMagic D1 DAC
  183. Is one gz34 enough
  184. Edcor OPT opinions
  185. mengyue mini/ming da el34b
  186. I need a tube buffer circuit using a 12au7
  187. Stereo Amplifier Wood Enclosure
  188. What is the theoretical advantage of direct heated triodes?
  189. 6AS6 is useful for audio ?
  190. GM-70 design approach
  191. Ultimate emotion core material ( types of silicon steel , Permalloy or Amorphous etc)
  192. Looking to build my first tube amplifier
  193. Tube/SS opamp
  194. Biasing 6CA7/EL34 in Luxman LX33
  195. John Broskie MIA again?
  196. combine filament winding for rectifier
  197. HYBRID TUBE CFP
  198. 9302 Maggie Rebuild
  199. Pyramid-IX monoblock, 200W from 4x GU-50
  200. Suggestions of phono stage to build
  201. Do power transformers affect sound quality?
  202. Help with a Velleman K4040 ...
  203. Capacitor replacement confusion
  204. RCA PA Amplifer, Input Transformers
  205. Channel imbalance Xiang Sheng DAC-01
  206. ARC M100s
  207. pros & cons of current mirror to balance a push-pull ?
  208. Wright Audio WLA10 help needed
  209. The Best tube/valve sound!?
  210. Mcintosh MC1000 and Ming Da MC300-PRE
  211. Operating Modern 845s
  212. The Transcendent Sound Son of Beast OTL Master/Mod Thread.
  213. Neutralizing An Amplifier
  214. Stacked speakers driven by an SEP amp?
  215. Tube buffer suggestion for LM4702 amplifier?
  216. FWB Voltage Doubler with -Bias supply
  217. 500V SE pentode design
  218. single ended transformer driving 32ohm speaker
  219. uC based Tube Curve Tracer Kit - Experts Opinion ?
  220. 250K Attenuator
  221. Possible to drive PP EL34-triodes with a cathodyne phase-splitter?
  222. Daughters POD amp 13EM7 Pics
  223. Calculating Ripple Current with PSUD2
  224. Channel problem on 45 converted amp
  225. Want to make a tube preamp
  226. Marantz TC-5 choke value
  227. diference between schematics and pcb layout
  228. Would this work?
  229. Can old resistors go bad?
  230. Strange output tube behaviour
  231. Practical question: toroidal transformer / heater current / kt120
  232. Morgan Jones Power supply cap values
  233. Can use a ballast for a PSU??
  234. Looking for a OTL tube headphone amp design
  235. Relative Humidity Attenuating HF
  236. Parallel Output transformer question
  237. Need help to ID a tube...
  238. Modifications to Sennheiser VKS 203
  239. Onix SP3 integrated amp latest schematic
  240. Omit sp3 integrated amp latest schematic
  241. Help: Western Electric 102A Tube Datasheet and Test Settings
  242. Power and output transformer separated from amplifier
  243. discrete and simple VCCS
  244. heater wiring question
  245. What is the deal with Welborne Labs?
  246. Center Channel
  247. input stage problem help please!
  248. Tube Tips/Tricks for beginners
  249. Any skilled custom tube amplifier builders out there?
  250. Are these tubes really matched?

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