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

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