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  1. Help! Phono stage LF instability
  2. Help! Mesa Stiletto is motorboating and then fuse blows
  3. Faulty tube?
  4. Philbrick opamp bases
  5. Hammond Driver transformers
  6. 6n7/2a3
  7. Flea power for cheap OPT's?
  8. 1st Project - Half time report
  9. Claus Byrith 4-30 Questions
  10. quicksilver 8417 biasing
  11. 6sl7
  12. Trying to identify/find documentation on a 50EH5 amp
  13. Basic tests and measurements for OPTs
  14. 6SN7GT SRSE Linestage
  15. Dynaco Mark III
  16. Push Pull 300B preliminary
  17. triode thermodynamic model
  18. My first post!
  19. A Neophyte's 12B4 Build Thread
  20. Webster Hammond Model "G" amplifier
  21. Matching tubes- WE 396a/RFT EL34
  22. What is the most powerful AF tube amp ever built?
  23. SOHA Amp & PSU Layout, need feedback
  24. smoke came from transformer
  25. Startup Cost?
  26. Old or new output transformer?
  27. speaker magnet proximity Question
  28. Russian L3-3 tube tester
  29. I made a web page on building triode models /w CurveCaptor
  30. Boosted Triode mode?
  31. Unbalacing a PP output transformer?
  32. ecl86 & ez80 - suitable for guitar amp?
  33. Double C Cores
  34. Aikido Power Supply
  35. Output Noise question
  36. Power Supply Ringing
  37. Compare Sowter SA08 with Plitron 3035SE for 300B
  38. My 6C33C SING WITH No SPEAKER !
  39. MOSFET Driver for Power Pentodes
  40. Floating heater supplies
  41. Altec Amplifiers
  42. What causes the overrun bias on V4?
  43. sound comparison of Class A1 vs A2 amps
  44. 12AU7 substituted for a 6922
  45. Whats the worst that could happen?
  46. Ferranti transformers
  47. PC Cooling Fans for Tube Amps
  48. 845 circuit suggestions
  49. DIY Sofia tube tester?
  50. transformer hum / buzz getting into B+?
  51. Safe Transformerless Amps Possible?
  52. GM70 Lower Voltage PP Question
  53. phonostage with 150VDC B+
  54. Spuddo more powerfull
  55. Larry Moore 300B/10Y/6SN7GT
  56. Foreplay Preamp volume popping
  57. Altec Tube Amplifiers
  58. Circuit review
  59. DIY Tube Tester for 6336s
  60. 12dw7 to 12ax7 conversion?
  61. 26 preamp
  62. Etf07
  63. 1st Project Heater Wiring
  64. Dropped tube
  65. Great bench supply for tube work.
  66. Mullard px25 - need matched pair
  67. 2W carbon composit ressy
  68. popping noise through 1 channel on Radford STA15
  69. Point to point wiring help
  70. 1st Time Project - Report 2 + advice sought
  71. "Simple" 2A3
  72. vinyl v cd differences - phono pre and cd-player
  73. Shielded input cable
  74. knight guitar amp conversion
  75. Dumb motor run capacitor question
  76. Coupling caps in ST35
  77. Mentmore M100
  78. How to match tubes?
  79. Transcendent OTL T8 Vs. Atma-Sphere M60
  80. New 12AX7A Pspice model
  81. What does R2D2, Mickey Mouse and a...
  82. Why 5V filament
  83. Alloys for filaments
  84. 6360 as Power Tube for SE amp
  85. Bridging Stereo Amps
  86. Problem with 6L6 Monoblock
  87. Gain
  88. Proper grounding method...
  89. Changing a tube amp...
  90. Houston Mini 2004 Pot question
  91. Diode Heatsink
  92. Looking for a PCB / kit for a bipolar tube rectified PSU
  93. compactron output stage and power supply
  94. Better sounding ECL86's
  95. Heathkit EA-3 conversion to guitar amp
  96. interesting amp & interesting problem
  97. Hybrid Tube / Mosfet Amplifier
  98. Again (sorry) what's the biggest 6V heater double rectifier?
  99. PP EL34 circuit wanted
  100. Need advice for transformer for tube GM 70.
  101. Pentode filter
  102. How to calculate for cathode follower
  103. 6L6WXT in a Dynaco ST-70
  104. tube preamp using submini tube
  105. SE Trafo for PP use
  106. WE91A Pentode Questions?
  107. Lower voltage Dynaco ST35 for 6P14P // 7247 replacement
  108. looking for schematic; three EL84's in PSE ?
  109. Need work done on a dynaco power amp
  110. quick question on fixed bias
  111. DIY Tube Audio dealers in New Zealand
  112. ornec
  113. Tuner filament supply question
  114. An idea for a partial feedback pentode amp using 6AU6's and 807's
  115. Tube current regulation for series heaters' supply.
  116. Bogen PCA-1 two tube booster amp
  117. First time building a tube preamp
  118. B&K 700 problems?
  119. Silvertone 1482 Blowing Rectifier Tubes
  120. Voltage Multipliers
  121. Russian 6P14P tubes
  122. Where to get tube spec sheets, pinouts
  123. PCL 82 Hybrid 2SC5200/2SA1943
  124. CCS in Otput Tube Cathode - Does It Make Sense?
  125. My Guitar Tube Amp. Help needed with Mesa/Boogie pre
  126. My brew of the "Darling"
  127. Series connection of filaments
  128. noisy filament transformer
  129. Circuit diagram for Trilogy VTi.
  130. Got oddball tubes!
  131. A photo for my question
  132. Make a preamp with an already buil amplifier
  133. DN2540
  134. mods for almarro amp
  135. Filament Transformer
  136. Circuit indentification
  137. Simplest Tube Regulated PSU?
  138. High Voltage Insulator for Umbilical
  139. wiring diagram, instruction on the transformer S-265-Q
  140. help me get started
  141. 12AU7 instead of 6C4
  142. Fisher 600 questions
  143. Phase inverter
  144. srpp input stage
  145. Orientation of EL34 Tubes
  146. Load termination ?
  147. Advice on SE DHT for Lowther Fidelio DX2
  148. Dynacord MV46 as a compressor
  149. Biggest dual triode output tube?
  150. OPT impedance question
  151. Partridge SE O/P transformers
  152. SimpleSE and me
  153. SRPP decoupling cap vs. output transformer
  154. Differences between 6SN7GTA and 6SN7GTB?
  155. Radford STA-15 questions
  156. Balanced Input Hookup
  157. Need Tube Testing Settings for 3 tubes
  158. Need helping in Grounded Grid preamp using 6H6P 6H30P
  159. Regulated Lab DC power supply
  160. Fixed Bias 6BQ5?
  161. Heathkit AG7 Audio Geneator
  162. Music Angel vs Mr Liang L1-L3? And best speakers for 3k budget?
  163. NEWBIE question SET vs. Solid State
  164. 6N6P cascode + 6AS7 Cathode follower
  165. Help me calculator OPT for 807, 6C4C tubes.
  166. Now I have caught the bug - next project
  167. 20W cathode follower amplifier
  168. Muting line level signals
  169. Anywhere in Hong Kong...
  170. RIAA / Pre mod/upgrade
  171. IT WORKS! Tube Phono Stage
  172. 2033 info sought
  173. Pentode Zeus
  174. 5987 (sc968b)
  175. Low Voltage Plate Follower 6DJ8 Buffer Power Supply
  176. JAN Sylvania 7308 vs. JAN Sylvania 6922
  177. recording amp
  178. A Tee-Vee T00b Amp
  179. metal tube lineup for a guitar amp
  180. Locating a bad resistor
  181. MiscEI
  182. ST70 iron recommendations please
  183. need help finding a link . . .
  184. Cathodyne Phase Inverter question
  185. Using a ignition coil for a audio transformer
  186. Multiple primary windings
  187. mcintosh mc3500 clone
  188. B+ Delay
  189. My attempt: 5 element Pentode Spice model
  190. Spelling, capitalization, and grammar.
  191. Power Supply
  192. Output Autotransformers
  193. Multi Section Cap....diy?
  194. Mullard: Tube Circuits for Audio Amplifiers" - Price?
  195. Tube rectifier to Solid state Diodes exchange
  196. Hickok 533A help
  197. Custom Cards For B&K 675 Tester
  198. Peavey Heritage VTX - Bias Question
  199. EMC Model 200 Tube Tester Any Info Pls
  200. Guitar amp PT design questions
  201. Bada PH-1 simple box mod
  202. Tubes Rectifier Help?
  203. How to make sense of LTSpice FFT analysis?
  204. Cascode with local feedback
  205. amps
  206. how to preserve copper plates?
  207. Stereo EL34 amplifier
  208. SA 3000 Counterpoint
  209. tube amp transformer identification
  210. Beginner needs advices for 807 PP project
  211. Heater Power Supply Pspice model
  212. FWCT Rectification
  213. dc or not dc
  214. OTL for dummies.
  215. TCJ Cathode-Coupled Amplifier
  216. 845 Low voltage SE AMP
  217. Vacuum Tube Computer Simulation Modeling
  218. Getting a vintage amp to work
  219. Switched DC/DCconverter for B+
  220. What can I do with this?
  221. Super Pas Two
  222. pspice model of 811A
  223. Question on what is more important B+ or Plate Voltage
  224. Can I trust SPICE?
  225. Power supply filter mod
  226. Does antone interested xxx PCB groupbuy ?
  227. 1 signal ground or two?
  228. Peavey Heritage VTX - Schematics
  229. #47......
  230. Hammond 1650F
  231. 100 watt KT88/6550 Designs
  232. What glue to use for tube glass bulb + base
  233. Tube filaments (heaters) power supply
  234. Quick Ecl86/6gw8 Amp
  235. Need help on eq. hook up for new tube system
  236. Alternatives to the Dynaco ST-70
  237. I need some eq. hook up expert advice please!
  238. Please help identify which plug I need for this socket
  239. Svetlana KT88 winged C's failings
  240. PP amp using 6p15P
  241. Time for another round of "Criticise my Circuit"... err..I mean
  242. Adding a parallel feed on DRD
  243. How hot can resistor stands?
  244. Hybrid amplifier A2 class
  245. Diodes on power supply output for voltage drop?
  246. Converting from single ended parafeed to differential
  247. micro-amp SE with 2,5k OPT+
  248. Unknown Tube Amp
  249. Aikido AC Heater Supply
  250. Help me find some odd looking rectifiers!

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