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  1. Open-Source Audio Input Switch
  2. Phono pre amp RF problem
  3. Best CHEAP + best BEST current production EL34?
  4. New toy
  5. EL84 SEP schematic. Some questions.
  6. Referencing DC heaters to cathode
  7. Need advice on Val Audio amp with EL-34 Tubes
  8. Please help a newbie with PSU current requirement for Aikido linestage
  9. Loudspeaker noise from 300B
  10. Schematic for GU-50, EL34, 6J32P ???
  11. alternative for heater / B+ references
  12. need a little help from some tube Gurus!!!
  13. EF86 + SPICE = no noise contribution?
  14. 6n1 tube = 6n1p
  15. One channel softer than the other, humming and buzzing
  16. Parallel Output Transformers
  17. Distortion from heater sag?
  18. Testing 5842 / 417a
  19. RH ECL86 Amp: Dave?
  20. High gain pentodes
  21. Tube Matching and Push-Pull
  22. What constitutes a leaky Coupling capacitor?
  23. Question on Input Connections
  24. s5electronics tube amp kit damping factor
  25. 6L6s and cabinet selections HELP!!!!
  26. source of nickel + silicon steel laminations
  27. Explanation for this problem?
  28. turn off thump
  29. Pop from amp when turning off
  30. Big Paper in Oil Caps
  31. Valve noobie asks for help / advice
  32. Polypropylene vs electrolytic in Power supply
  33. 6S4P vs 5842
  34. Calibrating Your Hickok Tube Tester
  35. Which 2A3 ?
  36. New design: 12V push-pull tube amplifier
  37. hybrid power supply: diode bridge into diode tube
  38. heater reference to B+ and buzzing trafo
  39. Hum cancelling scheme?
  40. Run a transformer backwards?
  41. FIVRE RRCF info needed
  42. Siemens Valvo ED-8000
  43. 6J5 and 6F6 SE - enough gain for guitar?
  44. My last Zamir Aleph
  45. Questions about first tube PSU!
  46. Looking for site
  47. Heater voltage mismatch
  48. Contacting Pete Millet for 813 PSU?
  49. Suggestions for first tube project?
  50. Just Saying Howdy
  51. Wiring a tube rectifier PSU
  52. Looking for a small yet powerful pentode / dual triode?
  53. Earth Bus Wire - Where can I get it?
  54. Tube Amp Startup
  55. 45 amplifier
  56. Noob saying Hi...
  57. Maida regulator
  58. Sensitivity limiter in Bogen MX60a
  59. Just finished first amp
  60. 6080 / 6AS7G power amplifier
  61. Schematics
  62. General questions before finishing up ST-35 clone
  63. Will a 12AX7 sub. for 12DW7/7247?
  64. Deutsche Wurlitzer Lyric Jukebox?
  65. Made in China buyer beware...
  66. Variac to power-up Beveridge OTLs?
  67. Any ideas on how old this is?
  68. Philips Tube radio
  69. Improve Avel toroid in OTL amp
  70. tube pre amp mods in queensland, australia
  71. 6SL7GT pre-amp
  72. Aikido circuit question
  73. question
  74. Edcor OPT's w/ SimpleSE
  75. Please check this PSU
  76. met. MKP in oil capacitors for PSU?
  77. EH EL34's at +600V?
  78. The Infamous Kay 703C! - Help finding an output transformer?
  79. MOT's as output transformers?
  80. Grain oriented silicon steel core data needed
  81. Gibson reverb driver transformer
  82. PSUD II help
  83. Edcor In SE Guitar Amp
  84. Tube curves
  85. S-5 electronics amp kits
  86. up-to-date El Cheapo schematic
  87. unknown output trannie
  88. Help needed with KT88 Amp design
  89. Bogen MX60a
  90. AIKIDO - Low-volage with buffer version
  91. 6N6P cascode calculation
  92. 866a Min operating voltages
  93. new 6V6 amp
  94. Tube-based CCS- 0.2uF cap OK?
  95. DHT filament PSU: What would you do?
  96. PSU problem
  97. 811A se amp using a solid state driver
  98. ECC83 - Long Plate vs Short Plate
  99. Tube Matching
  100. Cascoded mu-follower
  101. DIY speaker choice for SE
  102. Output transformer wanted
  103. big valve traffo for guitar amp?
  104. Tube Tester
  105. 835 amp
  106. One 300B filament supply for stereo?
  107. Aikido Built At Last!!
  108. Question about amount of feedback to apply
  109. design help needed.
  110. LED in cathode
  111. Need help for Eico 1030 regulated power supply
  112. zinc chassis
  113. Anode Cap Question
  114. what pins to use solid rectifier for 5Y3
  115. New PSU for Aikido?
  116. tube anti-vibration mounting
  117. Border Patrol PSU, can anyone help?
  118. Aikido Line Stage
  119. LED Bias Modifications
  120. danelectro vibravox
  121. Standby switch for bridge rectified power supplies.
  122. Decoupling in Phono stages.
  123. easy one valve pre help
  124. Single-ended-series amp with a "1 winding" transformer
  125. Complementary Symmetry Output
  126. Help getting these d$&* Dynascan probes apart!
  127. Aikido output cap selector switch
  128. adding an "on" lamp to amp kit
  129. Why does 6BM8 have so high max plate voltage?
  130. B+ soft start
  131. Unison research
  132. photos of my creations
  133. First Time Project - Finished! Photos Attached
  134. Design parameters for SE OPTs'
  135. want to build a pentode driven drd 2a3!
  136. Passive Magnetic Preamp!
  137. Testing an E288CC (8223)
  138. Need expert help on presence control
  139. Value of output caps for Aikido - how low is too low?
  140. Very expensive WE106A pre-amp, any member had this??
  141. B+ with or without tubes?
  142. 1st Time Project - Spot the howler
  143. Tube flashes on tester... Bad ?
  144. Amp advice needed for a poor DIY er...
  145. DCR of primaries and secondaries of Hammond Transformer
  146. 801 amp with Power Drive
  147. Where did this come from?
  148. 6N7S's PPP Class A
  149. your opinion needed.......
  150. ST-70 strangeness
  151. SS preamp w/ tube amp
  152. pri. impedance vs. sek. impedance
  153. TubeLab SimpleSe and speaker efficiency
  154. Question about speaker transformer
  155. How to read Russian Date Codes
  156. 300B Amp on ebay
  157. Would a 396A or 2C51 drive a 45?
  158. PSUD2 Q on regulator
  159. My last design
  160. OPT for 250th Se A2
  161. Silvertone 1481 power transformer?
  162. 829B, 3E29, QQV03-20 Connector
  163. Measuring from UK schematic but on US mains
  164. strange tube
  165. cathode resistor ?? in p-p fixed bias
  166. Need Help please . Headphones into line up of tube amp .
  167. 5Z4 inrush current too high
  168. Reducing gain on Audible Illusions M3A
  169. Decoding output transformers: strange SE's
  170. cheap and usable for 1K p-p iron?
  171. Help! Phono stage LF instability
  172. Help! Mesa Stiletto is motorboating and then fuse blows
  173. Faulty tube?
  174. Philbrick opamp bases
  175. Hammond Driver transformers
  176. 6n7/2a3
  177. Flea power for cheap OPT's?
  178. 1st Project - Half time report
  179. Claus Byrith 4-30 Questions
  180. quicksilver 8417 biasing
  181. 6sl7
  182. Trying to identify/find documentation on a 50EH5 amp
  183. Basic tests and measurements for OPTs
  184. 6SN7GT SRSE Linestage
  185. Dynaco Mark III
  186. Push Pull 300B preliminary
  187. triode thermodynamic model
  188. My first post!
  189. A Neophyte's 12B4 Build Thread
  190. Webster Hammond Model "G" amplifier
  191. Matching tubes- WE 396a/RFT EL34
  192. What is the most powerful AF tube amp ever built?
  193. SOHA Amp & PSU Layout, need feedback
  194. smoke came from transformer
  195. Startup Cost?
  196. Old or new output transformer?
  197. speaker magnet proximity Question
  198. Russian L3-3 tube tester
  199. I made a web page on building triode models /w CurveCaptor
  200. Boosted Triode mode?
  201. Unbalacing a PP output transformer?
  202. ecl86 & ez80 - suitable for guitar amp?
  203. Double C Cores
  204. Aikido Power Supply
  205. Output Noise question
  206. Power Supply Ringing
  207. Compare Sowter SA08 with Plitron 3035SE for 300B
  208. My 6C33C SING WITH No SPEAKER !
  209. MOSFET Driver for Power Pentodes
  210. Floating heater supplies
  211. Altec Amplifiers
  212. What causes the overrun bias on V4?
  213. sound comparison of Class A1 vs A2 amps
  214. 12AU7 substituted for a 6922
  215. Whats the worst that could happen?
  216. Ferranti transformers
  217. PC Cooling Fans for Tube Amps
  218. 845 circuit suggestions
  219. DIY Sofia tube tester?
  220. transformer hum / buzz getting into B+?
  221. Safe Transformerless Amps Possible?
  222. GM70 Lower Voltage PP Question
  223. phonostage with 150VDC B+
  224. Spuddo more powerfull
  225. Larry Moore 300B/10Y/6SN7GT
  226. Foreplay Preamp volume popping
  227. Altec Tube Amplifiers
  228. Circuit review
  229. DIY Tube Tester for 6336s
  230. 12dw7 to 12ax7 conversion?
  231. 26 preamp
  232. Etf07
  233. 1st Project Heater Wiring
  234. Dropped tube
  235. Great bench supply for tube work.
  236. Mullard px25 - need matched pair
  237. 2W carbon composit ressy
  238. popping noise through 1 channel on Radford STA15
  239. Point to point wiring help
  240. 1st Time Project - Report 2 + advice sought
  241. "Simple" 2A3
  242. vinyl v cd differences - phono pre and cd-player
  243. Shielded input cable
  244. knight guitar amp conversion
  245. Dumb motor run capacitor question
  246. Coupling caps in ST35
  247. Mentmore M100
  248. How to match tubes?
  249. Transcendent OTL T8 Vs. Atma-Sphere M60
  250. New 12AX7A Pspice model

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