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  1. yet another 6em7 amp
  2. zenith amp
  3. 6AG7 Amplifier
  4. Valve Power Supplies?
  5. tube tracer article
  6. PCB design techniques for Tube Amps
  7. Adjectives for tube sound!
  8. Question about Amperex tubes and a preamp
  9. I want to build a preamp for my dad.. thoughts?
  10. Constant Current DC Heater Supply
  11. Which valves for MF CD-T
  12. 6C33C-EB / 6C33C-EV extended life ?
  13. Yamamoto A-08S RCA 45 tube amplifier original schematic
  14. Audiovalve RKV schematic (hybrid headphones amp)
  15. Music Angel EL34 XDSE
  16. Dynaco PAS Preamp Tone Controls
  17. build 805 or 845 se for ~$1000
  18. Built a quick 26 pre yesterday..nice so far,,
  19. An UL preamp idea.
  20. 6BX7 PSpice Model?
  21. using 24G and 3B28 in an od ball amp.......
  22. Tube Line Buffer
  23. Please help me build an amp for my father
  24. Why is my phono amp fatiguing?
  25. Heater current drawn by 8416
  26. want dead counterpoint SA100 SA-100 in good cosmetics
  27. Cathode Followers and Clipping
  28. transformer secondary connections
  29. imp amp
  30. Information 6DJ8
  31. Smoothing Cap = Noise Source?
  32. 6S19P budget SE.
  33. My 2 new latest Dynaco ST-70's
  34. help with KT88 / mikaels SE amp
  35. adding LEDs to amp head
  36. What Is Line Level????
  37. chokes, caps, and long distance relationships
  38. First foray into tubes!!
  39. Simple Hi-end 845 amplifier
  40. increased choke inductance - recommended?
  41. HELP PLEASE - with preamp design
  42. Alternative to James OPTs
  43. DIY preamp tube: Audio Research Reference 3???
  44. Crowhurst's Twin Coupled Amplifier
  45. 6lw6 tv sweep tube bias?
  46. 24V aikido build!
  47. magnavox tube radio
  48. New S5 L series kits
  49. Anyone has experience with Stranwood
  50. 6n6p amp
  51. DC Darling Amp Buzzing on both channels.
  52. 6SL7 EL34 300B amp
  53. I just installed Yeos (DIY Paradise) DC Blocker
  54. Measuring Cathode Current
  55. Need the Ogirin Circuit of Bruce Berman
  56. Input Choke Too Small
  57. Would a line stage/preamp be beneficial? NEWBIE question
  58. 6p45c
  59. fanon pa amp schematic
  60. line stage confusion
  61. Hammond Transformer Secondary Connections
  62. Klimo Merlin LS Tube Power Supply
  63. OPT Design Assistante (EL84)
  64. Hum - can't find an answer by searching the forum
  65. Please critique my plans for a WE91 clone.
  66. Emission Labs 300B Mesh plate
  67. DRD Power Supply
  68. Octal Champ works - pls check design
  69. telefunken EL 34 audio tube
  70. Bias instability in Heathkit W-5M amp
  71. EL-34 instability in EICO HF-35 amp
  72. Matching Impedances
  73. Open-Source Audio Input Switch
  74. Phono pre amp RF problem
  75. Best CHEAP + best BEST current production EL34?
  76. New toy
  77. EL84 SEP schematic. Some questions.
  78. Referencing DC heaters to cathode
  79. Need advice on Val Audio amp with EL-34 Tubes
  80. Please help a newbie with PSU current requirement for Aikido linestage
  81. Loudspeaker noise from 300B
  82. Schematic for GU-50, EL34, 6J32P ???
  83. alternative for heater / B+ references
  84. need a little help from some tube Gurus!!!
  85. EF86 + SPICE = no noise contribution?
  86. 6n1 tube = 6n1p
  87. One channel softer than the other, humming and buzzing
  88. Parallel Output Transformers
  89. Distortion from heater sag?
  90. Testing 5842 / 417a
  91. RH ECL86 Amp: Dave?
  92. High gain pentodes
  93. Tube Matching and Push-Pull
  94. Question on Input Connections
  95. s5electronics tube amp kit damping factor
  96. 6L6s and cabinet selections HELP!!!!
  97. source of nickel + silicon steel laminations
  98. Explanation for this problem?
  99. turn off thump
  100. Pop from amp when turning off
  101. Valve noobie asks for help / advice
  102. Polypropylene vs electrolytic in Power supply
  103. 6S4P vs 5842
  104. Calibrating Your Hickok Tube Tester
  105. Which 2A3 ?
  106. New design: 12V push-pull tube amplifier
  107. hybrid power supply: diode bridge into diode tube
  108. heater reference to B+ and buzzing trafo
  109. Hum cancelling scheme?
  110. Run a transformer backwards?
  111. FIVRE RRCF info needed
  112. Siemens Valvo ED-8000
  113. My last Zamir Aleph
  114. Questions about first tube PSU!
  115. Looking for site
  116. Heater voltage mismatch
  117. Contacting Pete Millet for 813 PSU?
  118. Suggestions for first tube project?
  119. Just Saying Howdy
  120. Wiring a tube rectifier PSU
  121. Looking for a small yet powerful pentode / dual triode?
  122. Earth Bus Wire - Where can I get it?
  123. Tube Amp Startup
  124. 45 amplifier
  125. Noob saying Hi...
  126. Maida regulator
  127. Sensitivity limiter in Bogen MX60a
  128. Just finished first amp
  129. 6080 / 6AS7G power amplifier
  130. Schematics
  131. General questions before finishing up ST-35 clone
  132. Will a 12AX7 sub. for 12DW7/7247?
  133. Deutsche Wurlitzer Lyric Jukebox?
  134. Made in China buyer beware...
  135. Variac to power-up Beveridge OTLs?
  136. Any ideas on how old this is?
  137. Philips Tube radio
  138. Improve Avel toroid in OTL amp
  139. tube pre amp mods in queensland, australia
  140. 6SL7GT pre-amp
  141. Aikido circuit question
  142. question
  143. Edcor OPT's w/ SimpleSE
  144. Please check this PSU
  145. met. MKP in oil capacitors for PSU?
  146. EH EL34's at +600V?
  147. The Infamous Kay 703C! - Help finding an output transformer?
  148. MOT's as output transformers?
  149. Grain oriented silicon steel core data needed
  150. PSUD II help
  151. Tube curves
  152. S-5 electronics amp kits
  153. up-to-date El Cheapo schematic
  154. unknown output trannie
  155. Help needed with KT88 Amp design
  156. Bogen MX60a
  157. AIKIDO - Low-volage with buffer version
  158. 6N6P cascode calculation
  159. 866a Min operating voltages
  160. new 6V6 amp
  161. Tube-based CCS- 0.2uF cap OK?
  162. DHT filament PSU: What would you do?
  163. PSU problem
  164. 811A se amp using a solid state driver
  165. ECC83 - Long Plate vs Short Plate
  166. Tube Matching
  167. Cascoded mu-follower
  168. DIY speaker choice for SE
  169. Output transformer wanted
  170. Tube Tester
  171. 835 amp
  172. One 300B filament supply for stereo?
  173. Aikido Built At Last!!
  174. Question about amount of feedback to apply
  175. design help needed.
  176. LED in cathode
  177. Need help for Eico 1030 regulated power supply
  178. zinc chassis
  179. Anode Cap Question
  180. what pins to use solid rectifier for 5Y3
  181. New PSU for Aikido?
  182. tube anti-vibration mounting
  183. Border Patrol PSU, can anyone help?
  184. Aikido Line Stage
  185. LED Bias Modifications
  186. Standby switch for bridge rectified power supplies.
  187. Decoupling in Phono stages.
  188. easy one valve pre help
  189. Single-ended-series amp with a "1 winding" transformer
  190. Complementary Symmetry Output
  191. Help getting these d$&* Dynascan probes apart!
  192. Aikido output cap selector switch
  193. adding an "on" lamp to amp kit
  194. Why does 6BM8 have so high max plate voltage?
  195. B+ soft start
  196. Unison research
  197. photos of my creations
  198. First Time Project - Finished! Photos Attached
  199. Design parameters for SE OPTs'
  200. want to build a pentode driven drd 2a3!
  201. Passive Magnetic Preamp!
  202. Testing an E288CC (8223)
  203. Need expert help on presence control
  204. Value of output caps for Aikido - how low is too low?
  205. Very expensive WE106A pre-amp, any member had this??
  206. B+ with or without tubes?
  207. 1st Time Project - Spot the howler
  208. Tube flashes on tester... Bad ?
  209. Amp advice needed for a poor DIY er...
  210. DCR of primaries and secondaries of Hammond Transformer
  211. 801 amp with Power Drive
  212. Where did this come from?
  213. 6N7S's PPP Class A
  214. your opinion needed.......
  215. ST-70 strangeness
  216. SS preamp w/ tube amp
  217. pri. impedance vs. sek. impedance
  218. TubeLab SimpleSe and speaker efficiency
  219. Question about speaker transformer
  220. How to read Russian Date Codes
  221. 300B Amp on ebay
  222. Would a 396A or 2C51 drive a 45?
  223. PSUD2 Q on regulator
  224. My last design
  225. OPT for 250th Se A2
  226. 829B, 3E29, QQV03-20 Connector
  227. Measuring from UK schematic but on US mains
  228. strange tube
  229. cathode resistor ?? in p-p fixed bias
  230. Need Help please . Headphones into line up of tube amp .
  231. 5Z4 inrush current too high
  232. Reducing gain on Audible Illusions M3A
  233. Decoding output transformers: strange SE's
  234. cheap and usable for 1K p-p iron?
  235. Help! Phono stage LF instability
  236. Help! Mesa Stiletto is motorboating and then fuse blows
  237. Faulty tube?
  238. Philbrick opamp bases
  239. Hammond Driver transformers
  240. 6n7/2a3
  241. Flea power for cheap OPT's?
  242. 1st Project - Half time report
  243. Claus Byrith 4-30 Questions
  244. quicksilver 8417 biasing
  245. 6sl7
  246. Trying to identify/find documentation on a 50EH5 amp
  247. Basic tests and measurements for OPTs
  248. 6SN7GT SRSE Linestage
  249. Dynaco Mark III
  250. Push Pull 300B preliminary

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