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  1. Tube guilt
  2. KT88 or 6550
  3. Single ended OTL Transcendent
  4. K-12 kit, buzz in R channel
  5. Hickok 752A repair
  6. my new tube line stage
  7. Audio Innovations Series 200 Phono Stage
  8. is it correct to calculate OTL?
  9. Late Halloween Cartoon
  10. on/off/on switch for bright/bold?
  11. Another CCS for tubes/valves: PCBs
  12. Customdaveus
  13. newbie questions on Bogen M330A repair
  14. crackling sound from one channel
  15. Cosmos Valve amplifier
  16. The Vacuum Tube Truth
  17. Inverted Triode SE OTL
  18. Negative feedback problems on ECL82 SE amp.
  19. Cheap tester?
  20. Anyone familiar with Hyuger HK-300BS kit from Hino Audio?
  21. Fisher SA 1000
  22. Hot Hot Hot
  23. Dynaco PAS-4 manual
  24. amplifier pp with 6p3s
  25. rusty chassis - what to do?
  26. Use 9 pin Aikido PCB kit or buy 8 pin ?
  27. Where to find data sheets?
  28. how to reverse signal for Common Cathode circuit
  29. Audio note M2 power supply resistor value
  30. Are 6DZ7 to Rare to be fun?
  31. 7868 substitutes
  32. Millet Hybrid - stacked buffers
  33. Repairing an old tube raido
  34. 3 way ultimate DIY phonostage match!
  35. wanted sv572-3
  36. General Aikido power supply question
  37. question about beefing up my monoblocks
  38. multichannel tube amp
  39. Who can explain this FFT graph to me
  40. Equivalent Noise Resistance
  41. Any Tube heads near Central coast NSW
  42. Question
  43. Screen Supply For PP Amp
  44. Datasheets: RC coupled amp VS. typical characteristics
  45. How to calculate Tube Preamp output impedance?
  46. What vintage tube books do you own?
  47. re design of a SE tube amplifier
  48. NRI 70 tube chart
  49. Multimeter
  50. fizzy and unstable
  51. Russian spud amp
  52. Silly Question about 807
  53. Help with dared MP-15, please!
  54. tube tester B&k 606 Transformer brun need help
  55. Do tube curves tell most of the story?
  56. Sovtek 6B4-G
  57. Ultimate Amplifier
  58. How quiet is dead quiet?
  59. Max B+ for triode-connected KT88
  60. Acrosound Archive
  61. Hail to Vintage Power Transformer & Choke?
  62. 2a3 parafeed
  63. Kimmel mu stage
  64. 4043c
  65. Impedance quandary
  66. 6L6G Amp recommendations
  67. Beefing up the power supply
  68. System distortion and Single Ended Tube Amps
  69. TB3/1000 is alive ! ("European 833A")
  70. Another tube newb
  71. Decoding another recycled power trans
  72. parafeed plate choke calculation
  73. New to tube building / design - Input requested!
  74. tube preamp with hum??emf
  75. Which tubes for this OPT?
  76. Vacuum tube tester, do you own one?
  77. Ping salas re: LED baising
  78. Model train throttles?
  79. Microphonics that go away by themselves
  80. Variable cathode/plate resistors?
  81. 2 newbe questions
  82. 12B4A + LL1671 Linestage
  83. Distortion Analysis using an Oscilloscope
  84. Western Electric 'Harmonic Equalizer'
  85. Tube Newb Mc Intosh questions.
  86. AH NJoe TJOEB, valve compatibility issue
  87. Tubes: test as New? translation please
  88. new s5 tube amp kit
  89. Stereo BusBar OK?
  90. Fi Primer 807
  91. Calculating power output in the design stage?
  92. Overdriving the grid of a triode
  93. Newb Questions RE: HS caps & B+ Bias
  94. mercury vapor... i love it!!!
  95. Interstage Couple 300B 811-3 SE amp
  96. PCB Trace Clearance for High Voltage
  97. youtube - tubes!
  98. Noob to the Leak ST20
  99. Unconditional stability, phase shift and feedback
  100. An almost DIY 6DJ8 Linestage
  101. Is Acrosound T-330 really good?
  102. My 1st amp just came to life......pics
  103. Russian tube power amp repair
  104. Unity coupled circuit amplifier.
  105. info about lectron JH50
  106. G.E. 6CA7/EL34 - any good?
  107. SS Preamp and Tube Poweramp
  108. Values for OTL totem pole (cathode followers)
  109. 12au7 preamp will not work
  110. A Slew of Beginer Tube Questions
  111. calculating b+ voltage drop, decoupling?
  112. Another SET 2A3 in the world
  113. Help needed with Lectron JH 50 Amp
  114. Audio Note M2 regulator schematic
  115. 300b
  116. Three Simple Questions!!
  117. Edcor Transformers
  118. LTP with CCS - IM Distortion
  119. Strange 45 behaviour - help
  120. I have $250 to spend..what amp should I build?
  121. CCs plate load for mu follower 6sn7
  122. Best use of S-265 opt?
  123. what would be a reasonable price to pay for this tube ?
  124. Distortion Neutralizer for Odd Harmonics
  125. 6H13C preamp
  126. Testing tube for noise
  127. Optimal Umbilical Runs and Connections
  128. Little Dot MKIII, faulty driver tube, GE5654 alternative in the UK?
  129. Film capacitors for decoupling
  130. Non-simultaneous Pentode anode/G2 turn-on
  131. ArnoldC's IT coupled 300B amplifier
  132. Ultralinear pse
  133. Using 0D3's for DC regulation in Aikido
  134. ECC40 preamp
  135. Newbie PS questions
  136. Another cap replacement: uF changes..
  137. parallel EL84 transconductance amp
  138. Quad II Modified by Glenn Croft
  139. Wanted:Power transformers for Welborne DRD 300B amp
  140. Just finished testing my first 832A amp
  141. Russian Transformer cores
  142. Suitable diagram so I can use 4x Telsa RD 200B and 8x Tungsram RG 250/3000
  143. 15E and plate curves
  144. Replacing 6N1P' s with 6922s or 7308s
  145. the "cheapo"
  146. OPT Quality Factors?
  147. 50CA10 pushpull amp
  148. New Hammonds?
  149. Welborne Terraplane Amp-PS10 HV Regulated PS Problems
  150. Voltage Gain Confusion!!
  151. is this ok to build???
  152. PSUD2 help needed
  153. It's raining 10M45's!
  154. Grid Leak Bias on small signal pentodes.
  155. Equalizing + & - output voltage?
  156. Help with ECF80 spice model
  157. Would a Williamson sound better with a CCS tail in the driver?
  158. low ac voltage question
  159. Aikido/SMPS/SKA SS
  160. values of ground(?) coupling caps in Aikido
  161. Please explain grid stoppers..
  162. Psud2 Help
  163. Appropriate Iron for 211 Triode SE
  164. does anyone know the resistance of a hammond 300bx transformer
  165. Help with Aikido B+ Bias layout
  166. 12v 6BF7 preamp design tested
  167. power supply PLEASE HELP
  168. power supply PLEASE HELP
  169. power supply PLEASE HELP
  170. tube amp
  171. 6AU8A, and assorted questions
  172. PPP OPT clarification
  173. ECC83/12AX7 Tube test query
  174. 0D3 shunt regulator for single ended duty
  175. where to buy parts (transformers and chokes)
  176. beefy choke -- please help
  177. 5W EL84 drive EL84 SE
  178. Calculate minimum load current of choke?
  179. Best Sounding Output Tube
  180. Best internal wiring for power
  181. Preamp with DHT
  182. bogen m60 and webster pa
  183. 6p13p schematic
  184. Buzzing Choke - Any Ideas?
  185. Floating A2 Bias
  186. Any SE project for 91db speaker?
  187. Hammond Mains Transformer - Center Tap Split
  188. TINA-TI Tube Simulation
  189. Fixed Bias v Ultrapath
  190. cathode follower asymmetric slew
  191. 6SN7 with transformer coupling
  192. 6AQ7 - why so cheap???
  193. Grommes 260
  194. heathkit aa-81 mono blocks
  195. feedbackless interstage p-p kt88 amp
  196. Using Horizontal Output Tubes - Power Supply
  197. 6e5c
  198. Mr Liang 845 Sound :(
  199. Test pentode grids without a tester
  200. Info required : GAMMA VALVE AMPS..
  201. 6SN7 plate voltage, current and lifespan
  202. Clarification of floating heater supply
  203. Changed a cap and lost some bass...?
  204. 6P9/6AG7 Triode Amplifier
  205. Chokes Designed for Choke Input PSU's
  206. Power trafo...
  207. Any value to modding a UL OPT to CFBK?
  208. Rogers Cadet III Advice & Opinions Needed
  209. DCG5/5000GS Valve
  210. Morgan Jones on Google Books
  211. CCS for 12B4 linestage
  212. 6j9p
  213. philips hf 303 amp
  214. DIY tube testing Curve Tracer
  215. Amplifier impedance and pot selection
  216. Tube rise time and slew rate
  217. What's your favourite sounding DIY/kit tube amp?
  218. How to convert a 220v Chinese amp to 110v for US use
  219. look for schematic of 12v preamp ???
  220. Bevois Valley and parallel push pull
  221. Amp Wiring Color Code
  222. Xindak 805 monos $4700/pr USD
  223. A new DHT power supply idea
  224. 852 tube
  225. Tube Matcher help needed, ala PassDIY
  226. What's the difference?
  227. Cathode Feedback How-To?
  228. Is Thier Away To Clear Up Distortion???
  229. How much feedback for PP penthode?
  230. To regulate or not to regulate
  231. Anyone used interstage transformers for a 300B?
  232. Hissing Sound in KT88 Amp
  233. Go black or go around?
  234. Triodes that would like a 10K a-a OPT?
  235. Yaqin mc10L
  236. Cycline3 on the 12AU7
  237. How Would You Change This Soildstate Circuit To Tube
  238. Using existing transformer winding to provide and additional supply
  239. Magnetic shields for transformers
  240. First DIY job: Dual Tube Recording Preamp
  241. James Transformers
  242. Audiopax Model 7
  243. Isis 3030 Monoblocks
  244. From diode to tube rectification in my Aikido
  245. Williamson KT77 Question
  246. mu followers --- current --- please help
  247. need tube schematic
  248. switch snubber for Aikido
  249. Pioneer Tube Schematics
  250. Question about "bloaty" bass with SET and KT88's

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