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  1. Taylor 211 vs. GE 211
  2. regulated
  3. What should I do with these eico hf-12's?
  4. Dynaco mk3 clone hum issue
  5. First DIY project, which SE tube amp should I build?
  6. 6n11 tube headphone amp
  7. Kt88 Pin alignement problem=did a mistake
  8. LTspice Frustration...help, please..
  9. Bias mods
  10. Maida tracking preregulator?
  11. 230 VAC to 2*140 VAC transformer - 20VA
  12. Re gettering?
  13. Distortion rise on OPT
  14. How to build a transconductance tester for small driver tubes?
  15. Musical Fidelity X-10D Cap Mod
  16. 6N3 & 6E2 tubes.
  17. help with local nfb
  18. What should I build
  19. leak st20
  20. Wright Audio WPA 3.5 Humpot & schematics
  21. the old light bulb trick
  22. Dynaco ST70 KIT - your opinion please
  23. Wire for tubes using a plate cap?
  24. Lundahl LL1660 OPT Franks 6SN7 linestage
  25. GU-50 PP + 10k:16-8-4 Ohm ,20w OPT..what is the best to do?
  26. Tomiko 10k PP transformer?
  27. Powerdrive for higher grid wattage A2 transmitter tubes
  28. Marantz Model 5 Amps and Model Seven Preamp
  29. How to calculate output transformers
  30. Grounding considerations with external PS
  31. Cathodyne fet buffered balanced line out
  32. 807pp + input phase splitter
  33. leak st 20
  34. Questions about Champ mods, NF loop and more
  35. Does anyone know what this is!..???
  36. Thought Exercise: Submini Circlotron OTL Amp
  37. Preamp Grounding PCB
  38. Manley 440: Tubes red cherry after replacing old tubes with new ones
  39. EL95 Parallel Push Pull design
  40. What is the ideal low-noise heater power for high-power output tubes?
  41. Beijing 6N6T
  42. Tube recomedations for my first tube amp
  43. Tube Load Lines and B+
  44. Hybrid rectifier possible in PSUD?
  45. Hickok calibration
  46. Bias voltage slower to come up
  47. Can You Reccommend a 6922 tube?
  48. Miniblok Resistor Parameter Modulation using Pots
  49. gm70 driver tube tests
  50. 300B Globe physical dimensions
  51. DIY Fisher 800b into a mic pre
  52. OPT Modification Question-Help please?
  53. Cant find origin
  54. Fixing Sneaky Oscillation in P-P Amplifiers
  55. fu-29 Audioromy
  56. Almarro A205A as experimentation platform
  57. Thoughts on layout and potential for improvements
  58. What is the difference between "rectifier tubes" and "power tubes"
  59. uTracer...
  60. EL84/UL84 single valve amp
  61. Mic preamp - strange high frequency roll off problem
  62. Tissbury audio
  63. midification to srpp preamplifier input voltage
  64. DHT SE amp with ultrapath
  65. Tube mic preamp problem
  66. Output transformer: reasons for destruction?
  67. Bewitch KT88
  68. SE OPT Wiring
  69. maggie 185 to stereo guitar amp?
  70. Budget 300b tubes recommendations
  71. Hum problem through one channel
  72. Audio Research LS22 DIY
  73. 300V Tube Power Supply From 120VAC Without Rectifier?
  74. NOS Tube: Black Spot on Getter Flashing? Help
  75. FET Source Follower Distortion
  76. TUBE/MOSFET/BJT hibrid amp
  77. PYE Black Box amplifier
  78. Tube tester
  79. what OPT for 211 parallel SE amp?
  80. Opinions for 6550 bias.
  81. 832A as a Single Ended Tetrode Amp?
  82. DCPP - "Engineer's Amplifier" : Need a bit of help
  83. quicky rebuild 6v6 to 807
  84. Old fire bottles.
  85. Regulated Power Supply using 6550
  86. GU50 SE vs 300B SE tube amp??
  87. Help with voltages
  88. New to valves & this forum.
  89. new amp 2a3 pp
  90. Telefunken EL153 SE circuity
  91. RH 84 Variation: Direct Coupled Pentode
  92. Single Transformer, two valve rectifiers
  93. Capacitors for Radio Frequency Amlifier and Converter Oscillator Tubes
  94. Tube Screening Cans
  95. PSU grounding
  96. 6AX4GT TV damper
  97. plate on chinese 6L6 red on one side
  98. FM stereo decoder
  99. Under the Christmas Tree - Valve Amplifiers 4th Ed.
  100. Using those dern 1625 tubes: a simple SEP amplifier
  101. Pairs of resistors in opposite directions
  102. 45 spice model
  103. APEX 460 Tube mic modification
  104. EL84 and 6BQ5 are Same?
  105. Simple hybrid amplifier (35W/8Ohm)
  106. Yaqin mc 10l or qinpu 6000 mkii
  107. Reported attack site?
  108. LCR RIAA Phono with DHTs
  109. New Here -Would Like to Build
  110. 12E1 push pull poweramp
  111. marantz model 9
  112. I would appreciate some helpfull advice from Aikido builders
  113. Dynaco ST70 big Snorting noise.
  114. Good Soft Distortion
  115. magnavox 8301 revamp, need's a second look
  116. Circuit or schematic for current source of 7.5mA
  117. Sakuma's bleeder tubes and series connected transfomers
  118. Tube measurement
  119. adding tone control to SE 6v6 amp
  120. Easy Little 6L6 SE
  121. knight KA-55
  122. Hum in tube amp
  123. Lundahl LL1660 10 mA Alt V
  124. 12au7 valve preamp (again?)
  125. Simple DC heating question
  126. 6146B?
  127. Reduce gain on power amp?
  128. ES9023 DAC(subbu) + Tube Preamp with Remote and R2R volume control(Danzup)
  129. AC heaters question
  130. Anyone tried this Mcintosh c22 knock off.
  131. Help me to find pins for tube socket
  132. HT delay pcb...
  133. Power supply, heater questions...
  134. Heathkit AA-151, to separate pre-amp advise needed?
  135. grounding
  136. 2 Stage GM-70 amp in A2... possible?
  137. GlassWare Janus Shunt Rectifier Tube Swap
  138. Schematics
  139. SE 6B4G driver tube options?
  140. seeking datasheet of 6J2B-V in english
  141. Nailing Hum in my Phono Stage
  142. Shaving voltage off HV supply?
  143. LEAK T12 and POINT ONE - worth having ?
  144. Quicksilvers Mid Mono Schematic?
  145. Russian & East European Tube Factory Logos
  146. Lampizator Channel
  147. RIAA triode or pentode
  148. Cute Little Tube Oscilloscope, Thought I'd share.
  149. Is it really possible to deliver 2W into 40 ohms with an SET ?
  150. se
  151. Connecting Two Amps to Common Input
  152. Wiring Aikido using LSA/HPA switch
  153. Most exotic SET power amplifier
  154. Help with rogers cadet 3 integrated
  155. Opamps for servos in tube amps - Christmas gift from LT, 12-12-12!
  156. tube amp hum........normal or suggested fix?
  157. Building a beast: Stereo EL84 auto bias PP tube amp
  158. Becker Brescia auto radio
  159. Double feedback pentode Power Stage
  160. Anyone Using Guiguang 300b tubes?
  161. Where to get Audio Note Gaku-On service manual?
  162. Sanity Check - Input Transformer Overshoot
  163. TOA HA-355 vintage tube PA amp schematic
  164. EL34 PushPull UL Amp
  165. 6L6G emission too high
  166. Need help designing BIAS circuit for old Bell amp
  167. Heathkit A-5A 6L6 PP Integrated Amp
  168. Where to put the meter
  169. Radii GS-40pp
  170. Concept dilemma (pre/pwr/spud content)
  171. What to do with these Eimac tubes?
  172. Driving 211 with VT25 or EL34?
  173. DIY AMP start project - Help choosing one
  174. Pilot 248B Amp with weak channel
  175. 6H30 VA stage?
  176. What is the best way to connect DC filaments?
  177. suggestions for a parallel feed 45 amp?
  178. Counterpoint SA 5.1 repairs
  179. The Morgan Jones mini tube headphone Amplifier
  180. Borbely headphone amp
  181. Found An Amplifier In My Basement I'd Forgotten About & Learn It's Sought After
  182. Floating OPT oscilloscope measuraments
  183. I Wasn't Away That Long, What's WIth The Price Hikes On All My Old Toys?
  184. Channel voltage mismatch
  185. OS70/1750 datasheets
  186. Beautiful Chassis
  187. 6A4, 46 and 47...excellent sound tubes !!!!
  188. Is it Overkill to use Duelund Caps in Power Stage (Counterpoint SA-5.1)
  189. Quicksilver M135 Schematic?
  190. recognize this old amp?
  191. grey fogging inside 6sn7
  192. Point to point or pcb?
  193. Quad query
  194. Fixing a Velleman K4040 - Buzz HIss Crackle Blown Tubes
  195. Found Original Genalex 12AX7..Need Advice..
  196. OPT power rating and amplifier power
  197. 6BG6-GA
  198. EL84 driving EL84 SET with fixed bias
  199. P2P 6CG7 Input Buffer
  200. 865 in triode mode...anyone ever tried it?
  201. PP KT88 Amp Low frequency Ringing
  202. World audio designs kel34
  203. Glassware Audio Design
  204. 2A3 mounted horizontally
  205. from tube amp to fm reciever
  206. diy tube amp
  207. Cary 805ae xlr option
  208. ST-70 mono makeover
  209. breaking in audio capacitors
  210. Question about 6V6GT amp schematic
  211. Sherwood Schematic
  212. Ever hear of a D7L1 or D7L3 YR7 tube?
  213. Psvane Replica RCA 2A3 tube - WR2A3
  214. 845 Driver Circuit
  215. ADJUSTABLE BIAS MOD KIT
  216. Gold Lion B749 12au7 Thoughts?
  217. Siliconray SRK 09 tube amp kit help
  218. Quantum minstrel
  219. Does anyone know how John Lee Hooker recorded this? (1949)
  220. Please Identify these black capacitors.
  221. New Tubes too silent (6P15P)
  222. best sounding & value amp kits/designs?
  223. Custom Woodwork For Tube Amp
  224. Tube 2E22 in triode mode
  225. Has anyone built an OTL amp with switch mode power supplies.
  226. Altec 15067 transformers
  227. Some interesting findings with transformers
  228. Bogen KO-60 Output Iron
  229. What would you do with Scott 222D IRON?
  230. Aikido vs CCDA
  231. wiring color code
  232. Maverick Audio TubeMagic D1 DAC
  233. Is one gz34 enough
  234. Edcor OPT opinions
  235. mengyue mini/ming da el34b
  236. I need a tube buffer circuit using a 12au7
  237. Stereo Amplifier Wood Enclosure
  238. What is the theoretical advantage of direct heated triodes?
  239. 6AS6 is useful for audio ?
  240. GM-70 design approach
  241. Ultimate emotion core material ( types of silicon steel , Permalloy or Amorphous etc)
  242. Looking to build my first tube amplifier
  243. Tube/SS opamp
  244. Biasing 6CA7/EL34 in Luxman LX33
  245. John Broskie MIA again?
  246. combine filament winding for rectifier
  247. HYBRID TUBE CFP
  248. 9302 Maggie Rebuild
  249. Pyramid-IX monoblock, 200W from 4x GU-50
  250. Suggestions of phono stage to build

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