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  1. Question about amount of feedback to apply
  2. design help needed.
  3. LED in cathode
  4. Need help for Eico 1030 regulated power supply
  5. zinc chassis
  6. Anode Cap Question
  7. what pins to use solid rectifier for 5Y3
  8. New PSU for Aikido?
  9. tube anti-vibration mounting
  10. Border Patrol PSU, can anyone help?
  11. Aikido Line Stage
  12. LED Bias Modifications
  13. Standby switch for bridge rectified power supplies.
  14. Decoupling in Phono stages.
  15. easy one valve pre help
  16. Single-ended-series amp with a "1 winding" transformer
  17. Complementary Symmetry Output
  18. Help getting these d$&* Dynascan probes apart!
  19. Aikido output cap selector switch
  20. adding an "on" lamp to amp kit
  21. Why does 6BM8 have so high max plate voltage?
  22. B+ soft start
  23. Unison research
  24. photos of my creations
  25. First Time Project - Finished! Photos Attached
  26. Design parameters for SE OPTs'
  27. want to build a pentode driven drd 2a3!
  28. Passive Magnetic Preamp!
  29. Testing an E288CC (8223)
  30. Need expert help on presence control
  31. Value of output caps for Aikido - how low is too low?
  32. Very expensive WE106A pre-amp, any member had this??
  33. B+ with or without tubes?
  34. 1st Time Project - Spot the howler
  35. Amp advice needed for a poor DIY er...
  36. DCR of primaries and secondaries of Hammond Transformer
  37. 801 amp with Power Drive
  38. Where did this come from?
  39. 6N7S's PPP Class A
  40. your opinion needed.......
  41. ST-70 strangeness
  42. SS preamp w/ tube amp
  43. pri. impedance vs. sek. impedance
  44. Question about speaker transformer
  45. How to read Russian Date Codes
  46. 300B Amp on ebay
  47. Would a 396A or 2C51 drive a 45?
  48. PSUD2 Q on regulator
  49. My last design
  50. OPT for 250th Se A2
  51. 829B, 3E29, QQV03-20 Connector
  52. Measuring from UK schematic but on US mains
  53. strange tube
  54. cathode resistor ?? in p-p fixed bias
  55. Need Help please . Headphones into line up of tube amp .
  56. 5Z4 inrush current too high
  57. Reducing gain on Audible Illusions M3A
  58. Decoding output transformers: strange SE's
  59. cheap and usable for 1K p-p iron?
  60. Help! Phono stage LF instability
  61. Faulty tube?
  62. Philbrick opamp bases
  63. Hammond Driver transformers
  64. 6n7/2a3
  65. Flea power for cheap OPT's?
  66. 1st Project - Half time report
  67. Claus Byrith 4-30 Questions
  68. quicksilver 8417 biasing
  69. 6sl7
  70. Trying to identify/find documentation on a 50EH5 amp
  71. Basic tests and measurements for OPTs
  72. 6SN7GT SRSE Linestage
  73. Dynaco Mark III
  74. Push Pull 300B preliminary
  75. triode thermodynamic model
  76. My first post!
  77. A Neophyte's 12B4 Build Thread
  78. Webster Hammond Model "G" amplifier
  79. Matching tubes- WE 396a/RFT EL34
  80. What is the most powerful AF tube amp ever built?
  81. SOHA Amp & PSU Layout, need feedback
  82. smoke came from transformer
  83. Startup Cost?
  84. Old or new output transformer?
  85. speaker magnet proximity Question
  86. I made a web page on building triode models /w CurveCaptor
  87. Boosted Triode mode?
  88. Unbalacing a PP output transformer?
  89. Double C Cores
  90. Aikido Power Supply
  91. Output Noise question
  92. Power Supply Ringing
  93. Compare Sowter SA08 with Plitron 3035SE for 300B
  94. My 6C33C SING WITH No SPEAKER !
  95. MOSFET Driver for Power Pentodes
  96. Floating heater supplies
  97. Altec Amplifiers
  98. What causes the overrun bias on V4?
  99. sound comparison of Class A1 vs A2 amps
  100. 12AU7 substituted for a 6922
  101. Whats the worst that could happen?
  102. Ferranti transformers
  103. PC Cooling Fans for Tube Amps
  104. 845 circuit suggestions
  105. transformer hum / buzz getting into B+?
  106. Safe Transformerless Amps Possible?
  107. GM70 Lower Voltage PP Question
  108. phonostage with 150VDC B+
  109. Spuddo more powerfull
  110. Larry Moore 300B/10Y/6SN7GT
  111. Foreplay Preamp volume popping
  112. Altec Tube Amplifiers
  113. Circuit review
  114. 12dw7 to 12ax7 conversion?
  115. 26 preamp
  116. Etf07
  117. 1st Project Heater Wiring
  118. Dropped tube
  119. Great bench supply for tube work.
  120. Mullard px25 - need matched pair
  121. popping noise through 1 channel on Radford STA15
  122. Point to point wiring help
  123. 1st Time Project - Report 2 + advice sought
  124. "Simple" 2A3
  125. vinyl v cd differences - phono pre and cd-player
  126. Shielded input cable
  127. Coupling caps in ST35
  128. Mentmore M100
  129. How to match tubes?
  130. Transcendent OTL T8 Vs. Atma-Sphere M60
  131. New 12AX7A Pspice model
  132. What does R2D2, Mickey Mouse and a...
  133. Why 5V filament
  134. Alloys for filaments
  135. 6360 as Power Tube for SE amp
  136. Bridging Stereo Amps
  137. Problem with 6L6 Monoblock
  138. Gain
  139. Proper grounding method...
  140. Changing a tube amp...
  141. Houston Mini 2004 Pot question
  142. Diode Heatsink
  143. Looking for a PCB / kit for a bipolar tube rectified PSU
  144. compactron output stage and power supply
  145. Better sounding ECL86's
  146. interesting amp & interesting problem
  147. Hybrid Tube / Mosfet Amplifier
  148. Again (sorry) what's the biggest 6V heater double rectifier?
  149. PP EL34 circuit wanted
  150. Need advice for transformer for tube GM 70.
  151. Pentode filter
  152. How to calculate for cathode follower
  153. 6L6WXT in a Dynaco ST-70
  154. tube preamp using submini tube
  155. SE Trafo for PP use
  156. WE91A Pentode Questions?
  157. Lower voltage Dynaco ST35 for 6P14P // 7247 replacement
  158. looking for schematic; three EL84's in PSE ?
  159. Need work done on a dynaco power amp
  160. quick question on fixed bias
  161. DIY Tube Audio dealers in New Zealand
  162. ornec
  163. Tuner filament supply question
  164. An idea for a partial feedback pentode amp using 6AU6's and 807's
  165. Tube current regulation for series heaters' supply.
  166. Bogen PCA-1 two tube booster amp
  167. First time building a tube preamp
  168. B&K 700 problems?
  169. Voltage Multipliers
  170. Russian 6P14P tubes
  171. Where to get tube spec sheets, pinouts
  172. PCL 82 Hybrid 2SC5200/2SA1943
  173. CCS in Otput Tube Cathode - Does It Make Sense?
  174. My brew of the "Darling"
  175. Series connection of filaments
  176. noisy filament transformer
  177. Circuit diagram for Trilogy VTi.
  178. Got oddball tubes!
  179. A photo for my question
  180. Make a preamp with an already buil amplifier
  181. DN2540
  182. mods for almarro amp
  183. Filament Transformer
  184. Circuit indentification
  185. Simplest Tube Regulated PSU?
  186. High Voltage Insulator for Umbilical
  187. wiring diagram, instruction on the transformer S-265-Q
  188. help me get started
  189. 12AU7 instead of 6C4
  190. Fisher 600 questions
  191. Phase inverter
  192. srpp input stage
  193. Orientation of EL34 Tubes
  194. Load termination ?
  195. Advice on SE DHT for Lowther Fidelio DX2
  196. Biggest dual triode output tube?
  197. OPT impedance question
  198. Partridge SE O/P transformers
  199. SimpleSE and me
  200. SRPP decoupling cap vs. output transformer
  201. Differences between 6SN7GTA and 6SN7GTB?
  202. Radford STA-15 questions
  203. Balanced Input Hookup
  204. Need Tube Testing Settings for 3 tubes
  205. Need helping in Grounded Grid preamp using 6H6P 6H30P
  206. Regulated Lab DC power supply
  207. Fixed Bias 6BQ5?
  208. Music Angel vs Mr Liang L1-L3? And best speakers for 3k budget?
  209. NEWBIE question SET vs. Solid State
  210. 6N6P cascode + 6AS7 Cathode follower
  211. Help me calculator OPT for 807, 6C4C tubes.
  212. Now I have caught the bug - next project
  213. 20W cathode follower amplifier
  214. Muting line level signals
  215. Anywhere in Hong Kong...
  216. RIAA / Pre mod/upgrade
  217. IT WORKS! Tube Phono Stage
  218. 2033 info sought
  219. Pentode Zeus
  220. 5987 (sc968b)
  221. Low Voltage Plate Follower 6DJ8 Buffer Power Supply
  222. JAN Sylvania 7308 vs. JAN Sylvania 6922
  223. recording amp
  224. A Tee-Vee T00b Amp
  225. Locating a bad resistor
  226. MiscEI
  227. ST70 iron recommendations please
  228. need help finding a link . . .
  229. Cathodyne Phase Inverter question
  230. Using a ignition coil for a audio transformer
  231. Multiple primary windings
  232. mcintosh mc3500 clone
  233. B+ Delay
  234. My attempt: 5 element Pentode Spice model
  235. Spelling, capitalization, and grammar.
  236. Power Supply
  237. Output Autotransformers
  238. Multi Section Cap....diy?
  239. Mullard: Tube Circuits for Audio Amplifiers" - Price?
  240. Tube rectifier to Solid state Diodes exchange
  241. Custom Cards For B&K 675 Tester
  242. Bada PH-1 simple box mod
  243. Tubes Rectifier Help?
  244. Cascode with local feedback
  245. amps
  246. how to preserve copper plates?
  247. Stereo EL34 amplifier
  248. tube amp transformer identification
  249. SA 3000 Counterpoint
  250. Beginner needs advices for 807 PP project

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