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  1. Tube 6550 to test
  2. Using semiconductor curvetracer for tubes...
  3. Question regarding 3rd wire grounding and safety
  4. Plate Current VS Plate Voltage Graphs
  5. Toggle Switch Contact Type and Rating
  6. Inside information on Shuguang
  7. 6N6P vs. 6N6P-I
  8. Technical Survey Paper -- Need Some Help!
  9. VOLTAGE DOUBLER : drop in current?
  10. Using genetic algorithms to optimize pentode parameters
  11. Favorite size wire for signal wiring?
  12. Any idea what this thing is?
  13. Breadboarding Poindexter's 6GK5/EL34 Music Machine
  14. bad 5ar4?
  15. 6DJ8 biasing question
  16. anyone ever use el86/6cw5?
  17. Is it worth using anything other than DHTs for preamps?
  18. Billington Export Ltd Tubes?
  19. 845SE : comments on this circuit?
  20. Tip-Restoring Vintage Pot
  21. B+ Delay - Is this a problem?
  22. Toroids in SET
  23. I have to sell my Pyramid-V prototype...
  24. Stealing a preamp
  25. OLD GOLD, or something I can dissassemble and use
  26. CF PP design
  27. Preamp Idea
  28. Metal Oxide Screen Stoppers
  29. Splitting up power supply inductance
  30. Back to Back transformers and safety ground
  31. Vintage tube tester
  32. 7 pin ECC81.
  33. 26 Driver Tube for 45 - Operating Points
  34. My New pre-amplifier£¡
  35. Echocord Super Question
  36. High quality matching panel meters?
  37. 6BY5GA question
  38. Seeking schematic for Conn organ amp
  39. Will this work as a differential stage?
  40. Tube ID and suggestions
  41. 6L6 to EL34 conversion
  42. my saturation test ??
  43. DO-35 diode inside vacuum tube ?
  44. Transformer Polarity
  45. Modular Gain Stages for Tube Guitar Amp
  46. Where to go for tube gear in Hong Kong?
  47. EL84 Shunt reg for pre-amp, 85A1?
  48. Tube Preamp Idea
  49. UTC Linear Standard High Level matching transformers
  50. Manley Compact 160w noise problem -please help
  51. D3a Experimenters Breadboard Project
  52. Dtmm
  53. Running Single Ended 6V6 in Triode Mode
  54. 6v6pp Finished
  55. Stereo Buffer with a single twin triode
  56. Marshall volume drop off help
  57. Anybody recognize this pentode?
  58. Original schemes of amplifiers for 45 tubes of 1920 and 1930 years?
  59. My new amplifier£_300BSE!
  60. low zout vs output transfo
  61. can't find valve art tube - and glowey tube pic
  62. Which Phono Pre???
  63. EICO HF-20 Guitar Amp Convert
  64. BB 1702 DAC + transformer I/V ?
  65. aikido build thread-
  66. Triode Connected 6BK5
  67. need help in building tube amplifier 10 watter
  68. Parasitic oscillations in general
  69. Help Russian tube experts.
  70. forced aircooling
  71. Dirty Cheap Vintage Pot Fix - Your Opinion Please
  72. ask jan first
  73. running 6S4S/6C4C hot .. calling widowmaker
  74. An Odd Duck -- Gibson BR-6f Guitar Amp
  75. Covi Mark II OTL Help
  76. Volume pot between triodes?
  77. Series Pass Transistor for TL-783
  78. Anyone else have the new Mullard EL34's?
  79. VR tubes in single ended circuits
  80. Transformer for Tube Amps?
  81. "Magga Amp Workshop" builds again (Simple 45 Project)
  82. How to handle Reclaimed Transformers
  83. Dual supply...
  84. How much would this cost/how complicated would this be...
  85. low cost DHT hum pots vendors?
  86. Tube Buffer – question?
  87. Bogen CHB 10A questions
  88. 12B4 Preamp
  89. adding output tubes etc to pre amp
  90. primaluna dialogue 5 and fanboys?
  91. yaqin mc-100b
  92. KT88 in place of 6550?
  93. Tube manaul data sheets
  94. Need a bias supply how??
  95. Wouldn't you just love to have these!. United Electronics 211's
  96. Using single tube of Dual
  97. 21st century tube? Non-Vacuum
  98. making two minibloks for stereo
  99. Lynn Olson Raven Question
  100. Inrush current limiting heater filaments
  101. Tube amp with "meter"?
  102. lytics and choke AFTER regulator
  103. Boosing the power of your existing amp.
  104. Component ID from a 50EH5 Amp
  105. Music Angel KT88 Bridged /Bias problem
  106. Output of preamp drops when overdriven
  107. Choke load calculation...
  108. 807 SE amp schematic
  109. DC Heater Voltage
  110. Choke loading vs. SRPP
  111. Unloaded Power Transformer Current Draw/Janus-Aikido snipet
  112. Need help with tubed output for PCM1793 DAC
  113. Single ended transformer grounding question
  114. Reforming Caps with Variac
  115. First Shot at a 41 SE amp
  116. [Question] Ground Error?
  117. TOMIKO OPT-SE, any good?
  118. 6550 Williamson - Low Bass Response...
  119. Preamp design question
  120. Reading Oscilloscope Traces -For Dummies
  121. Power Supply Question
  122. PI Question Guitar Amp Related
  123. Altec 1568A modifications for comments and help…. again
  124. H & K Tube 20 unruly gain
  125. Electro-Harmonix interview
  126. Using LED bias for 4.5 mA cathode current, is it a good idea?
  127. amp dead?
  128. 7189 vs EL84 +458v plate
  129. What does your Aikido drive?
  130. Help with Decware SE84 Kit!
  131. Hybrid Amplifier in Small cases
  132. audio mixer with tubes?
  133. Epiphone Galaxy 25 transformer problem
  134. Help with KT88 biasing
  135. Bad Schottky??
  136. Aikido Diagnostic
  137. Could this become a Baby Huey killer ?
  138. SV83 vs EL84
  139. KT88 PP-5 Monoblock Amplifier
  140. RE604 SET amp
  141. Dropping rectifier filament voltage
  142. need suggestion about MC pre-pre
  143. New gain stage .. Opinions???
  144. Using SS to augment < 100Hz?
  145. A help with an soviet transformer.
  146. I thought that I had seen everything
  147. Triatic PP-amp with 6p14p
  148. Single 6N6P stereo pre-amp
  149. Tubelab SE input tube filament
  150. high frequency oscillation and decoupling question
  151. Long tailed pair schematic questions
  152. CCS Kit options
  153. Variac Question for Thatch_Ear
  154. 13e1
  155. Rogers Tube Amp
  156. Pair of McIntosh MC-60 on Dallas Craigslist
  157. Lundahl LL1517. What is it good for?
  158. Edcor OPT Voltage Rating?
  159. Which Tube to Start with?
  160. Basic Transformer hookup wiring
  161. Beta followers, biasing.
  162. 6W 2xEL519 Half-hybrid Class-A OTL
  163. Can a Class AB PP amp be said to be operating in Class A at low signal levels?
  164. Wiring / Layout question
  165. Yaqin MC10K
  166. help me lower the gain of this preamp pls
  167. How to wiring the transformer
  168. "universal" P-P driver board
  169. series or parallel?
  170. Question about Cathode bias in this Magnavox amp. . .
  171. GK71 B+ turn on delay
  172. Paralleling Triodes in a 6SN7GT
  173. 6C33C-B. PP or SE ?
  174. 6550 Triode B+
  175. Aikido Phono Pre.....any good???
  176. Tube Preamp L&amp;R Channel different current draw
  177. amp is dead!
  178. What you think about Ayon Audio Spark SE 6C33 tube 22 W
  179. Running stereo through a single tube with dual triodes?
  180. Looking for 6AQ5 audio preamp schematic!
  181. Quad KT88 oscillation problem
  182. El86 driving high beta bipolar power tr
  183. Wikipedia article: Tube sound
  184. Installed 12&quot; Speaker in Pro Jr---Now What??
  185. How do I design a pentode constant current source plate load?
  186. Socket for 6AQ5
  187. new 845? Who produces it?
  188. Looking for a 45 SE Schematic
  189. Counterpoint SA-12 outputs 2SK134/2SJ49 work??
  190. Tube Amps left outdoors 24/7
  191. The beast OTL
  192. Input transformer: floating input = distortion
  193. Altmann's Split Feedback concept
  194. preamp for a JE LABS 2A3DX amp
  195. Phase flip needed -Interstage Transformer?
  196. Can your amp do this?
  197. AES out of 1625?
  198. Any info on Haltron 6BL8 tubes?
  199. Need Schematic for 12 Volt Tube Buffer
  200. Input impedance for Simple SE?
  201. SR-101 Pioneer Spring Reverb
  202. Basic Transformer Question - how do I know build possibilities?
  203. Source for 2.5VCT 5A filament transformers
  204. Nichicon VR VZ or GU
  205. Missing 6.3V CT/'Cockeyed Bridge' problem
  206. Best plate voltage for 6dj8 at +-6ma
  207. Max supply voltage for small DHT's
  208. Operating Temperature of KT88?
  209. First Tube Amp
  210. earthing advice on a US amp
  211. distortion at low volume
  212. interstage transformer cheating?
  213. PP EL34 or 6L6 circuits?
  214. Rectifier Capacator (voltage adjust)
  215. Passive RIAA and cap variation
  216. 6T9 push pull with Cathode Coupled input
  217. mixed bias
  218. Need help: tube DAC and Phono pre-amp
  219. Feedback equation
  220. Lafayette PA 675 Schematic ?
  221. phono preamp?
  222. Input tube recommendations...
  223. blind test tube preamp free for all
  224. Estimate Miller of Triode Strapped Pentode
  225. Tube Care for Prolonged Life
  226. bias resistor to use for a PP 300B?
  227. 12AY7 preamp schematic
  228. visio shapes
  229. vt25 in pre amp
  230. Wire Wound Pontentiometers - resistors
  231. Sound City B120
  232. Single supply 6922 buffer with 2SK CCS
  233. Aikido and 30W Class AB power buffer?
  234. Simple Pentode driver for a 45 ?
  235. Sennheiser HD 650 Question
  236. ampeg svt 2 pro preamp problem
  237. Edcor specs?
  238. hook up wire
  239. 6X5, 2x 6SL7 &amp; a 6v6GT....
  240. strange tube? E-8128
  241. Value of grid-leak resistor
  242. TubeTech Valves
  243. 1st build done.
  244. Tube socket does not fit tube
  245. 300B SET Bias Help
  246. This Connector for an Amp Umbilical?
  247. Chassis Grounding and rectifiers
  248. TechTube TM Blackburn status
  249. Protection of tubes/amp...
  250. 6sf5

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