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  1. want to build a pentode driven drd 2a3!
  2. Passive Magnetic Preamp!
  3. Testing an E288CC (8223)
  4. Need expert help on presence control
  5. Value of output caps for Aikido - how low is too low?
  6. Very expensive WE106A pre-amp, any member had this??
  7. B+ with or without tubes?
  8. 1st Time Project - Spot the howler
  9. Tube flashes on tester... Bad ?
  10. Amp advice needed for a poor DIY er...
  11. DCR of primaries and secondaries of Hammond Transformer
  12. 801 amp with Power Drive
  13. Where did this come from?
  14. 6N7S's PPP Class A
  15. your opinion needed.......
  16. ST-70 strangeness
  17. SS preamp w/ tube amp
  18. pri. impedance vs. sek. impedance
  19. TubeLab SimpleSe and speaker efficiency
  20. Question about speaker transformer
  21. How to read Russian Date Codes
  22. 300B Amp on ebay
  23. Would a 396A or 2C51 drive a 45?
  24. PSUD2 Q on regulator
  25. My last design
  26. Silvertone 1481 power transformer?
  27. OPT for 250th Se A2
  28. 829B, 3E29, QQV03-20 Connector
  29. Measuring from UK schematic but on US mains
  30. strange tube
  31. cathode resistor ?? in p-p fixed bias
  32. Need Help please . Headphones into line up of tube amp .
  33. 5Z4 inrush current too high
  34. Reducing gain on Audible Illusions M3A
  35. Decoding output transformers: strange SE's
  36. cheap and usable for 1K p-p iron?
  37. Help! Phono stage LF instability
  38. Help! Mesa Stiletto is motorboating and then fuse blows
  39. Faulty tube?
  40. Philbrick opamp bases
  41. Hammond Driver transformers
  42. 6n7/2a3
  43. Flea power for cheap OPT's?
  44. 1st Project - Half time report
  45. Claus Byrith 4-30 Questions
  46. quicksilver 8417 biasing
  47. 6sl7
  48. Trying to identify/find documentation on a 50EH5 amp
  49. Basic tests and measurements for OPTs
  50. 6SN7GT SRSE Linestage
  51. Dynaco Mark III
  52. Push Pull 300B preliminary
  53. triode thermodynamic model
  54. My first post!
  55. A Neophyte's 12B4 Build Thread
  56. Webster Hammond Model "G" amplifier
  57. Matching tubes- WE 396a/RFT EL34
  58. What is the most powerful AF tube amp ever built?
  59. SOHA Amp & PSU Layout, need feedback
  60. smoke came from transformer
  61. Startup Cost?
  62. Old or new output transformer?
  63. speaker magnet proximity Question
  64. Russian L3-3 tube tester
  65. I made a web page on building triode models /w CurveCaptor
  66. Boosted Triode mode?
  67. Unbalacing a PP output transformer?
  68. ecl86 & ez80 - suitable for guitar amp?
  69. Double C Cores
  70. Aikido Power Supply
  71. Output Noise question
  72. Power Supply Ringing
  73. Compare Sowter SA08 with Plitron 3035SE for 300B
  74. My 6C33C SING WITH No SPEAKER !
  75. MOSFET Driver for Power Pentodes
  76. Floating heater supplies
  77. Altec Amplifiers
  78. What causes the overrun bias on V4?
  79. sound comparison of Class A1 vs A2 amps
  80. 12AU7 substituted for a 6922
  81. Whats the worst that could happen?
  82. Ferranti transformers
  83. PC Cooling Fans for Tube Amps
  84. 845 circuit suggestions
  85. DIY Sofia tube tester?
  86. transformer hum / buzz getting into B+?
  87. Safe Transformerless Amps Possible?
  88. GM70 Lower Voltage PP Question
  89. phonostage with 150VDC B+
  90. Spuddo more powerfull
  91. Larry Moore 300B/10Y/6SN7GT
  92. Foreplay Preamp volume popping
  93. Altec Tube Amplifiers
  94. Circuit review
  95. DIY Tube Tester for 6336s
  96. 12dw7 to 12ax7 conversion?
  97. 26 preamp
  98. Etf07
  99. 1st Project Heater Wiring
  100. Dropped tube
  101. Great bench supply for tube work.
  102. Mullard px25 - need matched pair
  103. 2W carbon composit ressy
  104. popping noise through 1 channel on Radford STA15
  105. Point to point wiring help
  106. 1st Time Project - Report 2 + advice sought
  107. "Simple" 2A3
  108. vinyl v cd differences - phono pre and cd-player
  109. Shielded input cable
  110. knight guitar amp conversion
  111. Dumb motor run capacitor question
  112. Coupling caps in ST35
  113. Mentmore M100
  114. How to match tubes?
  115. Transcendent OTL T8 Vs. Atma-Sphere M60
  116. New 12AX7A Pspice model
  117. What does R2D2, Mickey Mouse and a...
  118. Why 5V filament
  119. Alloys for filaments
  120. 6360 as Power Tube for SE amp
  121. Bridging Stereo Amps
  122. Problem with 6L6 Monoblock
  123. Gain
  124. Proper grounding method...
  125. Changing a tube amp...
  126. Houston Mini 2004 Pot question
  127. Diode Heatsink
  128. Looking for a PCB / kit for a bipolar tube rectified PSU
  129. compactron output stage and power supply
  130. Better sounding ECL86's
  131. Heathkit EA-3 conversion to guitar amp
  132. interesting amp & interesting problem
  133. Hybrid Tube / Mosfet Amplifier
  134. Again (sorry) what's the biggest 6V heater double rectifier?
  135. PP EL34 circuit wanted
  136. Need advice for transformer for tube GM 70.
  137. Pentode filter
  138. How to calculate for cathode follower
  139. 6L6WXT in a Dynaco ST-70
  140. tube preamp using submini tube
  141. SE Trafo for PP use
  142. WE91A Pentode Questions?
  143. Lower voltage Dynaco ST35 for 6P14P // 7247 replacement
  144. looking for schematic; three EL84's in PSE ?
  145. Need work done on a dynaco power amp
  146. quick question on fixed bias
  147. DIY Tube Audio dealers in New Zealand
  148. ornec
  149. Tuner filament supply question
  150. An idea for a partial feedback pentode amp using 6AU6's and 807's
  151. Tube current regulation for series heaters' supply.
  152. Bogen PCA-1 two tube booster amp
  153. First time building a tube preamp
  154. B&K 700 problems?
  155. Silvertone 1482 Blowing Rectifier Tubes
  156. Voltage Multipliers
  157. Russian 6P14P tubes
  158. Where to get tube spec sheets, pinouts
  159. PCL 82 Hybrid 2SC5200/2SA1943
  160. CCS in Otput Tube Cathode - Does It Make Sense?
  161. My Guitar Tube Amp. Help needed with Mesa/Boogie pre
  162. My brew of the "Darling"
  163. Series connection of filaments
  164. noisy filament transformer
  165. Circuit diagram for Trilogy VTi.
  166. Got oddball tubes!
  167. A photo for my question
  168. Make a preamp with an already buil amplifier
  169. DN2540
  170. mods for almarro amp
  171. Filament Transformer
  172. Circuit indentification
  173. Simplest Tube Regulated PSU?
  174. High Voltage Insulator for Umbilical
  175. wiring diagram, instruction on the transformer S-265-Q
  176. help me get started
  177. 12AU7 instead of 6C4
  178. Fisher 600 questions
  179. Phase inverter
  180. srpp input stage
  181. Orientation of EL34 Tubes
  182. Load termination ?
  183. Advice on SE DHT for Lowther Fidelio DX2
  184. Dynacord MV46 as a compressor
  185. Biggest dual triode output tube?
  186. OPT impedance question
  187. Partridge SE O/P transformers
  188. SimpleSE and me
  189. SRPP decoupling cap vs. output transformer
  190. Differences between 6SN7GTA and 6SN7GTB?
  191. Radford STA-15 questions
  192. Balanced Input Hookup
  193. Need Tube Testing Settings for 3 tubes
  194. Need helping in Grounded Grid preamp using 6H6P 6H30P
  195. Regulated Lab DC power supply
  196. Fixed Bias 6BQ5?
  197. Heathkit AG7 Audio Geneator
  198. Music Angel vs Mr Liang L1-L3? And best speakers for 3k budget?
  199. NEWBIE question SET vs. Solid State
  200. 6N6P cascode + 6AS7 Cathode follower
  201. Help me calculator OPT for 807, 6C4C tubes.
  202. Now I have caught the bug - next project
  203. 20W cathode follower amplifier
  204. Muting line level signals
  205. Anywhere in Hong Kong...
  206. RIAA / Pre mod/upgrade
  207. IT WORKS! Tube Phono Stage
  208. 2033 info sought
  209. Pentode Zeus
  210. 5987 (sc968b)
  211. Low Voltage Plate Follower 6DJ8 Buffer Power Supply
  212. JAN Sylvania 7308 vs. JAN Sylvania 6922
  213. recording amp
  214. A Tee-Vee T00b Amp
  215. metal tube lineup for a guitar amp
  216. Locating a bad resistor
  217. MiscEI
  218. ST70 iron recommendations please
  219. need help finding a link . . .
  220. Cathodyne Phase Inverter question
  221. Using a ignition coil for a audio transformer
  222. Multiple primary windings
  223. mcintosh mc3500 clone
  224. B+ Delay
  225. My attempt: 5 element Pentode Spice model
  226. Spelling, capitalization, and grammar.
  227. Power Supply
  228. Output Autotransformers
  229. Multi Section Cap....diy?
  230. Mullard: Tube Circuits for Audio Amplifiers" - Price?
  231. Tube rectifier to Solid state Diodes exchange
  232. Hickok 533A help
  233. Custom Cards For B&K 675 Tester
  234. Peavey Heritage VTX - Bias Question
  235. EMC Model 200 Tube Tester Any Info Pls
  236. Guitar amp PT design questions
  237. Bada PH-1 simple box mod
  238. Tubes Rectifier Help?
  239. How to make sense of LTSpice FFT analysis?
  240. Cascode with local feedback
  241. amps
  242. how to preserve copper plates?
  243. Stereo EL34 amplifier
  244. SA 3000 Counterpoint
  245. tube amp transformer identification
  246. Beginner needs advices for 807 PP project
  247. Heater Power Supply Pspice model
  248. FWCT Rectification
  249. dc or not dc
  250. OTL for dummies.

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