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  1. Tube Characteristics
  2. Tube guilt
  3. KT88 or 6550
  4. Single ended OTL Transcendent
  5. K-12 kit, buzz in R channel
  6. Hickok 752A repair
  7. my new tube line stage
  8. Audio Innovations Series 200 Phono Stage
  9. is it correct to calculate OTL?
  10. Late Halloween Cartoon
  11. on/off/on switch for bright/bold?
  12. Another CCS for tubes/valves: PCBs
  13. Customdaveus
  14. newbie questions on Bogen M330A repair
  15. crackling sound from one channel
  16. Cosmos Valve amplifier
  17. The Vacuum Tube Truth
  18. Inverted Triode SE OTL
  19. Negative feedback problems on ECL82 SE amp.
  20. Cheap tester?
  21. Anyone familiar with Hyuger HK-300BS kit from Hino Audio?
  22. Fisher SA 1000
  23. Hot Hot Hot
  24. Dynaco PAS-4 manual
  25. amplifier pp with 6p3s
  26. rusty chassis - what to do?
  27. Use 9 pin Aikido PCB kit or buy 8 pin ?
  28. Where to find data sheets?
  29. how to reverse signal for Common Cathode circuit
  30. Audio note M2 power supply resistor value
  31. Are 6DZ7 to Rare to be fun?
  32. 7868 substitutes
  33. Millet Hybrid - stacked buffers
  34. Repairing an old tube raido
  35. 3 way ultimate DIY phonostage match!
  36. wanted sv572-3
  37. General Aikido power supply question
  38. question about beefing up my monoblocks
  39. multichannel tube amp
  40. Who can explain this FFT graph to me
  41. Equivalent Noise Resistance
  42. Any Tube heads near Central coast NSW
  43. Question
  44. Screen Supply For PP Amp
  45. Datasheets: RC coupled amp VS. typical characteristics
  46. How to calculate Tube Preamp output impedance?
  47. What vintage tube books do you own?
  48. re design of a SE tube amplifier
  49. NRI 70 tube chart
  50. Multimeter
  51. fizzy and unstable
  52. Russian spud amp
  53. Silly Question about 807
  54. Help with dared MP-15, please!
  55. tube tester B&k 606 Transformer brun need help
  56. Do tube curves tell most of the story?
  57. Sovtek 6B4-G
  58. Ultimate Amplifier
  59. How quiet is dead quiet?
  60. Max B+ for triode-connected KT88
  61. Acrosound Archive
  62. Hail to Vintage Power Transformer & Choke?
  63. 2a3 parafeed
  64. Kimmel mu stage
  65. 4043c
  66. Impedance quandary
  67. 6L6G Amp recommendations
  68. Beefing up the power supply
  69. System distortion and Single Ended Tube Amps
  70. TB3/1000 is alive ! ("European 833A")
  71. Another tube newb
  72. Decoding another recycled power trans
  73. parafeed plate choke calculation
  74. New to tube building / design - Input requested!
  75. tube preamp with hum??emf
  76. Which tubes for this OPT?
  77. Vacuum tube tester, do you own one?
  78. Ping salas re: LED baising
  79. Model train throttles?
  80. Microphonics that go away by themselves
  81. Variable cathode/plate resistors?
  82. 2 newbe questions
  83. 12B4A + LL1671 Linestage
  84. crate vintage "club 50" schematics needed
  85. Distortion Analysis using an Oscilloscope
  86. Western Electric 'Harmonic Equalizer'
  87. Tube Newb Mc Intosh questions.
  88. AH NJoe TJOEB, valve compatibility issue
  89. Tubes: test as New? translation please
  90. new s5 tube amp kit
  91. Stereo BusBar OK?
  92. Fi Primer 807
  93. Calculating power output in the design stage?
  94. Overdriving the grid of a triode
  95. Newb Questions RE: HS caps & B+ Bias
  96. mercury vapor... i love it!!!
  97. Interstage Couple 300B 811-3 SE amp
  98. PCB Trace Clearance for High Voltage
  99. youtube - tubes!
  100. Noob to the Leak ST20
  101. Unconditional stability, phase shift and feedback
  102. An almost DIY 6DJ8 Linestage
  103. Is Acrosound T-330 really good?
  104. My 1st amp just came to life......pics
  105. Russian tube power amp repair
  106. Unity coupled circuit amplifier.
  107. info about lectron JH50
  108. G.E. 6CA7/EL34 - any good?
  109. black face champ tubes
  110. SS Preamp and Tube Poweramp
  111. Values for OTL totem pole (cathode followers)
  112. 12au7 preamp will not work
  113. A Slew of Beginer Tube Questions
  114. calculating b+ voltage drop, decoupling?
  115. Another SET 2A3 in the world
  116. Help needed with Lectron JH 50 Amp
  117. Audio Note M2 regulator schematic
  118. 300b
  119. Three Simple Questions!!
  120. Edcor Transformers
  121. LTP with CCS - IM Distortion
  122. Strange 45 behaviour - help
  123. I have $250 to spend..what amp should I build?
  124. CCs plate load for mu follower 6sn7
  125. Best use of S-265 opt?
  126. what would be a reasonable price to pay for this tube ?
  127. Distortion Neutralizer for Odd Harmonics
  128. 6H13C preamp
  129. Testing tube for noise
  130. Optimal Umbilical Runs and Connections
  131. Little Dot MKIII, faulty driver tube, GE5654 alternative in the UK?
  132. Film capacitors for decoupling
  133. Non-simultaneous Pentode anode/G2 turn-on
  134. ArnoldC's IT coupled 300B amplifier
  135. Ultralinear pse
  136. Using 0D3's for DC regulation in Aikido
  137. ECC40 preamp
  138. Newbie PS questions
  139. Preliminary 12AX7 guitar preamp
  140. Another cap replacement: uF changes..
  141. parallel EL84 transconductance amp
  142. Quad II Modified by Glenn Croft
  143. Wanted:Power transformers for Welborne DRD 300B amp
  144. Just finished testing my first 832A amp
  145. Russian Transformer cores
  146. Suitable diagram so I can use 4x Telsa RD 200B and 8x Tungsram RG 250/3000
  147. 15E and plate curves
  148. Replacing 6N1P' s with 6922s or 7308s
  149. the "cheapo"
  150. OPT Quality Factors?
  151. 50CA10 pushpull amp
  152. New Hammonds?
  153. Welborne Terraplane Amp-PS10 HV Regulated PS Problems
  154. Voltage Gain Confusion!!
  155. is this ok to build???
  156. PSUD2 help needed
  157. It's raining 10M45's!
  158. Grid Leak Bias on small signal pentodes.
  159. Equalizing + & - output voltage?
  160. Help with ECF80 spice model
  161. Would a Williamson sound better with a CCS tail in the driver?
  162. low ac voltage question
  163. Aikido/SMPS/SKA SS
  164. values of ground(?) coupling caps in Aikido
  165. Please explain grid stoppers..
  166. Psud2 Help
  167. Appropriate Iron for 211 Triode SE
  168. does anyone know the resistance of a hammond 300bx transformer
  169. Help with Aikido B+ Bias layout
  170. 12v 6BF7 preamp design tested
  171. power supply PLEASE HELP
  172. power supply PLEASE HELP
  173. power supply PLEASE HELP
  174. tube amp
  175. 6AU8A, and assorted questions
  176. PPP OPT clarification
  177. ECC83/12AX7 Tube test query
  178. 0D3 shunt regulator for single ended duty
  179. where to buy parts (transformers and chokes)
  180. beefy choke -- please help
  181. 5W EL84 drive EL84 SE
  182. Calculate minimum load current of choke?
  183. Best Sounding Output Tube
  184. Best internal wiring for power
  185. Preamp with DHT
  186. bogen m60 and webster pa
  187. 6p13p schematic
  188. Buzzing Choke - Any Ideas?
  189. Floating A2 Bias
  190. Any SE project for 91db speaker?
  191. Hammond Mains Transformer - Center Tap Split
  192. TINA-TI Tube Simulation
  193. Fixed Bias v Ultrapath
  194. Traynor YBA200 6550 help!
  195. cathode follower asymmetric slew
  196. 6SN7 with transformer coupling
  197. 6AQ7 - why so cheap???
  198. Grommes 260
  199. heathkit aa-81 mono blocks
  200. feedbackless interstage p-p kt88 amp
  201. Using Horizontal Output Tubes - Power Supply
  202. 6e5c
  203. Mr Liang 845 Sound :(
  204. Test pentode grids without a tester
  205. Info required : GAMMA VALVE AMPS..
  206. 6SN7 plate voltage, current and lifespan
  207. Clarification of floating heater supply
  208. Changed a cap and lost some bass...?
  209. 6P9/6AG7 Triode Amplifier
  210. Chokes Designed for Choke Input PSU's
  211. Power trafo...
  212. Any value to modding a UL OPT to CFBK?
  213. One guitar, multiple amps at once?
  214. Rogers Cadet III Advice & Opinions Needed
  215. DCG5/5000GS Valve
  216. Morgan Jones on Google Books
  217. CCS for 12B4 linestage
  218. 6j9p
  219. philips hf 303 amp
  220. DIY tube testing Curve Tracer
  221. Amplifier impedance and pot selection
  222. Tube rise time and slew rate
  223. What's your favourite sounding DIY/kit tube amp?
  224. How to convert a 220v Chinese amp to 110v for US use
  225. look for schematic of 12v preamp ???
  226. Bevois Valley and parallel push pull
  227. Amp Wiring Color Code
  228. Xindak 805 monos $4700/pr USD
  229. A new DHT power supply idea
  230. 852 tube
  231. Tube Matcher help needed, ala PassDIY
  232. What's the difference?
  233. Cathode Feedback How-To?
  234. Is Thier Away To Clear Up Distortion???
  235. How much feedback for PP penthode?
  236. To regulate or not to regulate
  237. Anyone used interstage transformers for a 300B?
  238. Hissing Sound in KT88 Amp
  239. Go black or go around?
  240. Triodes that would like a 10K a-a OPT?
  241. Yaqin mc10L
  242. Cycline3 on the 12AU7
  243. How Would You Change This Soildstate Circuit To Tube
  244. Using existing transformer winding to provide and additional supply
  245. Magnetic shields for transformers
  246. First DIY job: Dual Tube Recording Preamp
  247. James Transformers
  248. Audiopax Model 7
  249. Isis 3030 Monoblocks
  250. From diode to tube rectification in my Aikido

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