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  1. Measuring Cathode Current
  2. Need the Ogirin Circuit of Bruce Berman
  3. Input Choke Too Small
  4. Poodle gives clues to capacitor construction
  5. Would a line stage/preamp be beneficial? NEWBIE question
  6. 6p45c
  7. fanon pa amp schematic
  8. line stage confusion
  9. Hammond Transformer Secondary Connections
  10. Klimo Merlin LS Tube Power Supply
  11. OPT Design Assistante (EL84)
  12. Hum - can't find an answer by searching the forum
  13. Please critique my plans for a WE91 clone.
  14. Emission Labs 300B Mesh plate
  15. DRD Power Supply
  16. Octal Champ works - pls check design
  17. telefunken EL 34 audio tube
  18. Bias instability in Heathkit W-5M amp
  19. EL-34 instability in EICO HF-35 amp
  20. Russian paper in oil caps - any good?
  21. Matching Impedances
  22. Open-Source Audio Input Switch
  23. Phono pre amp RF problem
  24. Best CHEAP + best BEST current production EL34?
  25. New toy
  26. EL84 SEP schematic. Some questions.
  27. Referencing DC heaters to cathode
  28. Need advice on Val Audio amp with EL-34 Tubes
  29. Please help a newbie with PSU current requirement for Aikido linestage
  30. Loudspeaker noise from 300B
  31. Schematic for GU-50, EL34, 6J32P ???
  32. alternative for heater / B+ references
  33. need a little help from some tube Gurus!!!
  34. EF86 + SPICE = no noise contribution?
  35. 6n1 tube = 6n1p
  36. One channel softer than the other, humming and buzzing
  37. Parallel Output Transformers
  38. Distortion from heater sag?
  39. Testing 5842 / 417a
  40. RH ECL86 Amp: Dave?
  41. High gain pentodes
  42. Tube Matching and Push-Pull
  43. What constitutes a leaky Coupling capacitor?
  44. Question on Input Connections
  45. s5electronics tube amp kit damping factor
  46. 6L6s and cabinet selections HELP!!!!
  47. source of nickel + silicon steel laminations
  48. Explanation for this problem?
  49. turn off thump
  50. Pop from amp when turning off
  51. Big Paper in Oil Caps
  52. Valve noobie asks for help / advice
  53. Polypropylene vs electrolytic in Power supply
  54. 6S4P vs 5842
  55. Calibrating Your Hickok Tube Tester
  56. Which 2A3 ?
  57. New design: 12V push-pull tube amplifier
  58. hybrid power supply: diode bridge into diode tube
  59. heater reference to B+ and buzzing trafo
  60. Hum cancelling scheme?
  61. Run a transformer backwards?
  62. FIVRE RRCF info needed
  63. Siemens Valvo ED-8000
  64. 6J5 and 6F6 SE - enough gain for guitar?
  65. My last Zamir Aleph
  66. Questions about first tube PSU!
  67. Looking for site
  68. Heater voltage mismatch
  69. Contacting Pete Millet for 813 PSU?
  70. Suggestions for first tube project?
  71. Just Saying Howdy
  72. Wiring a tube rectifier PSU
  73. Looking for a small yet powerful pentode / dual triode?
  74. Earth Bus Wire - Where can I get it?
  75. Tube Amp Startup
  76. 45 amplifier
  77. Noob saying Hi...
  78. Maida regulator
  79. Sensitivity limiter in Bogen MX60a
  80. Just finished first amp
  81. 6080 / 6AS7G power amplifier
  82. Schematics
  83. General questions before finishing up ST-35 clone
  84. Will a 12AX7 sub. for 12DW7/7247?
  85. Deutsche Wurlitzer Lyric Jukebox?
  86. Made in China buyer beware...
  87. Variac to power-up Beveridge OTLs?
  88. Any ideas on how old this is?
  89. Philips Tube radio
  90. Improve Avel toroid in OTL amp
  91. tube pre amp mods in queensland, australia
  92. 6SL7GT pre-amp
  93. Aikido circuit question
  94. question
  95. Edcor OPT's w/ SimpleSE
  96. Please check this PSU
  97. met. MKP in oil capacitors for PSU?
  98. EH EL34's at +600V?
  99. The Infamous Kay 703C! - Help finding an output transformer?
  100. MOT's as output transformers?
  101. Grain oriented silicon steel core data needed
  102. Gibson reverb driver transformer
  103. PSUD II help
  104. Edcor In SE Guitar Amp
  105. Tube curves
  106. S-5 electronics amp kits
  107. up-to-date El Cheapo schematic
  108. unknown output trannie
  109. Help needed with KT88 Amp design
  110. Bogen MX60a
  111. AIKIDO - Low-volage with buffer version
  112. 6N6P cascode calculation
  113. 866a Min operating voltages
  114. new 6V6 amp
  115. Tube-based CCS- 0.2uF cap OK?
  116. DHT filament PSU: What would you do?
  117. PSU problem
  118. 811A se amp using a solid state driver
  119. ECC83 - Long Plate vs Short Plate
  120. Tube Matching
  121. Cascoded mu-follower
  122. DIY speaker choice for SE
  123. Output transformer wanted
  124. big valve traffo for guitar amp?
  125. Tube Tester
  126. 835 amp
  127. One 300B filament supply for stereo?
  128. Aikido Built At Last!!
  129. Question about amount of feedback to apply
  130. design help needed.
  131. LED in cathode
  132. Need help for Eico 1030 regulated power supply
  133. zinc chassis
  134. Anode Cap Question
  135. what pins to use solid rectifier for 5Y3
  136. New PSU for Aikido?
  137. tube anti-vibration mounting
  138. Border Patrol PSU, can anyone help?
  139. Aikido Line Stage
  140. LED Bias Modifications
  141. danelectro vibravox
  142. Standby switch for bridge rectified power supplies.
  143. Decoupling in Phono stages.
  144. easy one valve pre help
  145. Single-ended-series amp with a "1 winding" transformer
  146. Complementary Symmetry Output
  147. Help getting these d$&* Dynascan probes apart!
  148. Aikido output cap selector switch
  149. adding an "on" lamp to amp kit
  150. Why does 6BM8 have so high max plate voltage?
  151. B+ soft start
  152. Unison research
  153. photos of my creations
  154. First Time Project - Finished! Photos Attached
  155. Design parameters for SE OPTs'
  156. want to build a pentode driven drd 2a3!
  157. Passive Magnetic Preamp!
  158. Testing an E288CC (8223)
  159. Need expert help on presence control
  160. Value of output caps for Aikido - how low is too low?
  161. Very expensive WE106A pre-amp, any member had this??
  162. B+ with or without tubes?
  163. 1st Time Project - Spot the howler
  164. Tube flashes on tester... Bad ?
  165. Amp advice needed for a poor DIY er...
  166. DCR of primaries and secondaries of Hammond Transformer
  167. 801 amp with Power Drive
  168. Where did this come from?
  169. 6N7S's PPP Class A
  170. your opinion needed.......
  171. ST-70 strangeness
  172. SS preamp w/ tube amp
  173. pri. impedance vs. sek. impedance
  174. TubeLab SimpleSe and speaker efficiency
  175. Question about speaker transformer
  176. How to read Russian Date Codes
  177. 300B Amp on ebay
  178. Would a 396A or 2C51 drive a 45?
  179. PSUD2 Q on regulator
  180. My last design
  181. Silvertone 1481 power transformer?
  182. OPT for 250th Se A2
  183. 829B, 3E29, QQV03-20 Connector
  184. Measuring from UK schematic but on US mains
  185. strange tube
  186. cathode resistor ?? in p-p fixed bias
  187. Need Help please . Headphones into line up of tube amp .
  188. 5Z4 inrush current too high
  189. Reducing gain on Audible Illusions M3A
  190. Decoding output transformers: strange SE's
  191. cheap and usable for 1K p-p iron?
  192. Help! Phono stage LF instability
  193. Help! Mesa Stiletto is motorboating and then fuse blows
  194. Faulty tube?
  195. Philbrick opamp bases
  196. Hammond Driver transformers
  197. 6n7/2a3
  198. Flea power for cheap OPT's?
  199. 1st Project - Half time report
  200. Claus Byrith 4-30 Questions
  201. quicksilver 8417 biasing
  202. 6sl7
  203. Trying to identify/find documentation on a 50EH5 amp
  204. Basic tests and measurements for OPTs
  205. 6SN7GT SRSE Linestage
  206. Dynaco Mark III
  207. Push Pull 300B preliminary
  208. triode thermodynamic model
  209. My first post!
  210. A Neophyte's 12B4 Build Thread
  211. Webster Hammond Model "G" amplifier
  212. Matching tubes- WE 396a/RFT EL34
  213. What is the most powerful AF tube amp ever built?
  214. SOHA Amp & PSU Layout, need feedback
  215. smoke came from transformer
  216. Startup Cost?
  217. Old or new output transformer?
  218. speaker magnet proximity Question
  219. Russian L3-3 tube tester
  220. I made a web page on building triode models /w CurveCaptor
  221. Boosted Triode mode?
  222. Unbalacing a PP output transformer?
  223. ecl86 & ez80 - suitable for guitar amp?
  224. Double C Cores
  225. Aikido Power Supply
  226. Output Noise question
  227. Power Supply Ringing
  228. Compare Sowter SA08 with Plitron 3035SE for 300B
  229. My 6C33C SING WITH No SPEAKER !
  230. MOSFET Driver for Power Pentodes
  231. Floating heater supplies
  232. Altec Amplifiers
  233. What causes the overrun bias on V4?
  234. sound comparison of Class A1 vs A2 amps
  235. 12AU7 substituted for a 6922
  236. Whats the worst that could happen?
  237. Ferranti transformers
  238. PC Cooling Fans for Tube Amps
  239. 845 circuit suggestions
  240. DIY Sofia tube tester?
  241. transformer hum / buzz getting into B+?
  242. Safe Transformerless Amps Possible?
  243. GM70 Lower Voltage PP Question
  244. phonostage with 150VDC B+
  245. Spuddo more powerfull
  246. Larry Moore 300B/10Y/6SN7GT
  247. Foreplay Preamp volume popping
  248. Altec Tube Amplifiers
  249. Circuit review
  250. DIY Tube Tester for 6336s

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