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  1. Where to find data sheets?
  2. how to reverse signal for Common Cathode circuit
  3. Audio note M2 power supply resistor value
  4. Are 6DZ7 to Rare to be fun?
  5. 7868 substitutes
  6. Millet Hybrid - stacked buffers
  7. Repairing an old tube raido
  8. 3 way ultimate DIY phonostage match!
  9. wanted sv572-3
  10. General Aikido power supply question
  11. question about beefing up my monoblocks
  12. multichannel tube amp
  13. Who can explain this FFT graph to me
  14. Equivalent Noise Resistance
  15. Any Tube heads near Central coast NSW
  16. Question
  17. Screen Supply For PP Amp
  18. Datasheets: RC coupled amp VS. typical characteristics
  19. How to calculate Tube Preamp output impedance?
  20. What vintage tube books do you own?
  21. re design of a SE tube amplifier
  22. NRI 70 tube chart
  23. Multimeter
  24. fizzy and unstable
  25. Russian spud amp
  26. Silly Question about 807
  27. Help with dared MP-15, please!
  28. tube tester B&k 606 Transformer brun need help
  29. Do tube curves tell most of the story?
  30. Sovtek 6B4-G
  31. Ultimate Amplifier
  32. How quiet is dead quiet?
  33. Max B+ for triode-connected KT88
  34. Acrosound Archive
  35. Hail to Vintage Power Transformer & Choke?
  36. 2a3 parafeed
  37. Kimmel mu stage
  38. 4043c
  39. Impedance quandary
  40. 6L6G Amp recommendations
  41. Beefing up the power supply
  42. System distortion and Single Ended Tube Amps
  43. TB3/1000 is alive ! ("European 833A")
  44. Another tube newb
  45. Decoding another recycled power trans
  46. parafeed plate choke calculation
  47. New to tube building / design - Input requested!
  48. tube preamp with hum??emf
  49. Which tubes for this OPT?
  50. Vacuum tube tester, do you own one?
  51. Ping salas re: LED baising
  52. Model train throttles?
  53. Microphonics that go away by themselves
  54. Variable cathode/plate resistors?
  55. 2 newbe questions
  56. 12B4A + LL1671 Linestage
  57. crate vintage "club 50" schematics needed
  58. Distortion Analysis using an Oscilloscope
  59. Western Electric 'Harmonic Equalizer'
  60. Tube Newb Mc Intosh questions.
  61. AH NJoe TJOEB, valve compatibility issue
  62. Tubes: test as New? translation please
  63. new s5 tube amp kit
  64. Stereo BusBar OK?
  65. Fi Primer 807
  66. Calculating power output in the design stage?
  67. Overdriving the grid of a triode
  68. Newb Questions RE: HS caps & B+ Bias
  69. mercury vapor... i love it!!!
  70. Interstage Couple 300B 811-3 SE amp
  71. PCB Trace Clearance for High Voltage
  72. youtube - tubes!
  73. Noob to the Leak ST20
  74. Unconditional stability, phase shift and feedback
  75. An almost DIY 6DJ8 Linestage
  76. Is Acrosound T-330 really good?
  77. My 1st amp just came to life......pics
  78. Russian tube power amp repair
  79. Unity coupled circuit amplifier.
  80. info about lectron JH50
  81. G.E. 6CA7/EL34 - any good?
  82. black face champ tubes
  83. SS Preamp and Tube Poweramp
  84. Values for OTL totem pole (cathode followers)
  85. 12au7 preamp will not work
  86. A Slew of Beginer Tube Questions
  87. calculating b+ voltage drop, decoupling?
  88. Another SET 2A3 in the world
  89. Help needed with Lectron JH 50 Amp
  90. Audio Note M2 regulator schematic
  91. 300b
  92. Three Simple Questions!!
  93. Edcor Transformers
  94. LTP with CCS - IM Distortion
  95. Strange 45 behaviour - help
  96. I have $250 to spend..what amp should I build?
  97. CCs plate load for mu follower 6sn7
  98. Best use of S-265 opt?
  99. what would be a reasonable price to pay for this tube ?
  100. Distortion Neutralizer for Odd Harmonics
  101. 6H13C preamp
  102. Testing tube for noise
  103. Optimal Umbilical Runs and Connections
  104. Little Dot MKIII, faulty driver tube, GE5654 alternative in the UK?
  105. Film capacitors for decoupling
  106. Non-simultaneous Pentode anode/G2 turn-on
  107. ArnoldC's IT coupled 300B amplifier
  108. Ultralinear pse
  109. Using 0D3's for DC regulation in Aikido
  110. ECC40 preamp
  111. Newbie PS questions
  112. Preliminary 12AX7 guitar preamp
  113. Another cap replacement: uF changes..
  114. parallel EL84 transconductance amp
  115. Quad II Modified by Glenn Croft
  116. Wanted:Power transformers for Welborne DRD 300B amp
  117. Just finished testing my first 832A amp
  118. Russian Transformer cores
  119. Suitable diagram so I can use 4x Telsa RD 200B and 8x Tungsram RG 250/3000
  120. 15E and plate curves
  121. Replacing 6N1P' s with 6922s or 7308s
  122. the "cheapo"
  123. OPT Quality Factors?
  124. 50CA10 pushpull amp
  125. New Hammonds?
  126. Welborne Terraplane Amp-PS10 HV Regulated PS Problems
  127. Voltage Gain Confusion!!
  128. is this ok to build???
  129. PSUD2 help needed
  130. It's raining 10M45's!
  131. Grid Leak Bias on small signal pentodes.
  132. Equalizing + & - output voltage?
  133. Help with ECF80 spice model
  134. Would a Williamson sound better with a CCS tail in the driver?
  135. low ac voltage question
  136. Aikido/SMPS/SKA SS
  137. values of ground(?) coupling caps in Aikido
  138. Please explain grid stoppers..
  139. Psud2 Help
  140. Appropriate Iron for 211 Triode SE
  141. does anyone know the resistance of a hammond 300bx transformer
  142. Help with Aikido B+ Bias layout
  143. 12v 6BF7 preamp design tested
  144. power supply PLEASE HELP
  145. power supply PLEASE HELP
  146. power supply PLEASE HELP
  147. tube amp
  148. 6AU8A, and assorted questions
  149. PPP OPT clarification
  150. ECC83/12AX7 Tube test query
  151. 0D3 shunt regulator for single ended duty
  152. where to buy parts (transformers and chokes)
  153. beefy choke -- please help
  154. 5W EL84 drive EL84 SE
  155. Calculate minimum load current of choke?
  156. Best Sounding Output Tube
  157. Best internal wiring for power
  158. Preamp with DHT
  159. bogen m60 and webster pa
  160. 6p13p schematic
  161. Buzzing Choke - Any Ideas?
  162. Floating A2 Bias
  163. Any SE project for 91db speaker?
  164. Hammond Mains Transformer - Center Tap Split
  165. TINA-TI Tube Simulation
  166. Fixed Bias v Ultrapath
  167. Traynor YBA200 6550 help!
  168. cathode follower asymmetric slew
  169. 6SN7 with transformer coupling
  170. 6AQ7 - why so cheap???
  171. Grommes 260
  172. heathkit aa-81 mono blocks
  173. feedbackless interstage p-p kt88 amp
  174. Using Horizontal Output Tubes - Power Supply
  175. 6e5c
  176. Mr Liang 845 Sound :(
  177. Test pentode grids without a tester
  178. Info required : GAMMA VALVE AMPS..
  179. 6SN7 plate voltage, current and lifespan
  180. Clarification of floating heater supply
  181. Changed a cap and lost some bass...?
  182. 6P9/6AG7 Triode Amplifier
  183. Chokes Designed for Choke Input PSU's
  184. Power trafo...
  185. Any value to modding a UL OPT to CFBK?
  186. One guitar, multiple amps at once?
  187. Rogers Cadet III Advice & Opinions Needed
  188. DCG5/5000GS Valve
  189. Morgan Jones on Google Books
  190. CCS for 12B4 linestage
  191. 6j9p
  192. philips hf 303 amp
  193. DIY tube testing Curve Tracer
  194. Amplifier impedance and pot selection
  195. Tube rise time and slew rate
  196. What's your favourite sounding DIY/kit tube amp?
  197. How to convert a 220v Chinese amp to 110v for US use
  198. look for schematic of 12v preamp ???
  199. Bevois Valley and parallel push pull
  200. Amp Wiring Color Code
  201. Xindak 805 monos $4700/pr USD
  202. A new DHT power supply idea
  203. 852 tube
  204. Tube Matcher help needed, ala PassDIY
  205. What's the difference?
  206. Cathode Feedback How-To?
  207. Is Thier Away To Clear Up Distortion???
  208. How much feedback for PP penthode?
  209. To regulate or not to regulate
  210. Anyone used interstage transformers for a 300B?
  211. Hissing Sound in KT88 Amp
  212. Go black or go around?
  213. Triodes that would like a 10K a-a OPT?
  214. Yaqin mc10L
  215. Cycline3 on the 12AU7
  216. How Would You Change This Soildstate Circuit To Tube
  217. Using existing transformer winding to provide and additional supply
  218. Magnetic shields for transformers
  219. First DIY job: Dual Tube Recording Preamp
  220. James Transformers
  221. Audiopax Model 7
  222. Isis 3030 Monoblocks
  223. From diode to tube rectification in my Aikido
  224. Williamson KT77 Question
  225. mu followers --- current --- please help
  226. need tube schematic
  227. switch snubber for Aikido
  228. Pioneer Tube Schematics
  229. Question about "bloaty" bass with SET and KT88's
  230. Ultron 6v6GT
  231. low power OTLs
  232. 6H30 equivalents
  233. What Would You Do?
  234. k-502/k-12m vs. Model 1 pcl82
  235. Shunting Pot
  236. Suggested replacements for Chinese tubes
  237. What to do with these.....
  238. ECL82 PP "reference" amp
  239. Heater TX proximity
  240. Quick question on the PP-C1 amp
  241. SET "interstage coupler" for First Watt F4
  242. 811A amp Class A2
  243. TVC before Input Transformer?
  244. Point-to-Point, Pointers
  245. Triode recommendation
  246. Schmitt & CCS
  247. Simple DC Heater Supply
  248. Output transformers ? sound quality ?
  249. KT88 Minimum Mounting Distance
  250. LED bias indicator

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