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  1. Using existing transformer winding to provide and additional supply
  2. Magnetic shields for transformers
  3. First DIY job: Dual Tube Recording Preamp
  4. James Transformers
  5. Audiopax Model 7
  6. Isis 3030 Monoblocks
  7. From diode to tube rectification in my Aikido
  8. Williamson KT77 Question
  9. mu followers --- current --- please help
  10. need tube schematic
  11. switch snubber for Aikido
  12. Pioneer Tube Schematics
  13. Question about "bloaty" bass with SET and KT88's
  14. Ultron 6v6GT
  15. low power OTLs
  16. 6H30 equivalents
  17. What Would You Do?
  18. k-502/k-12m vs. Model 1 pcl82
  19. Shunting Pot
  20. Suggested replacements for Chinese tubes
  21. What to do with these.....
  22. ECL82 PP "reference" amp
  23. Heater TX proximity
  24. Quick question on the PP-C1 amp
  25. SET "interstage coupler" for First Watt F4
  26. 811A amp Class A2
  27. TVC before Input Transformer?
  28. Point-to-Point, Pointers
  29. Triode recommendation
  30. Schmitt & CCS
  31. Simple DC Heater Supply
  32. Output transformers ? sound quality ?
  33. KT88 Minimum Mounting Distance
  34. LED bias indicator
  35. Standby Switch
  36. chinese tube amp
  37. Broskie OTL
  38. Connecting a single plate to multiple screens?
  39. voltage divider+Aikido
  40. Wiring PSU and Aikido PCB
  41. Mission 300b parallel single ended
  42. Vietnam tube amplifier festival
  43. learning design but need help
  44. tutorial software
  45. Fisher 500C troubleshooting
  46. triode pentodes
  47. Deriving Secondary Voltages
  48. Here's the W-5M schematics . . .
  49. Question for Heathkit W-5M owners
  50. Classic 16.0
  51. 100 Ohm loudspeaker
  52. Are Srpp's Any Good (please Help)
  53. Blasphemy, I'm sure
  54. Decware ZSLA buffer -- worth cloning?
  55. Pse El84
  56. 6S19P Push-Pull Amplifier
  57. Class B Triodes
  58. Need a serious PP driver stage
  59. laptop->tubes?
  60. cathode follower -- damping factor (HELP please)
  61. Interstage X-former identification
  62. Multi-turn pot?
  63. 6L6G and 6L6GB differences?
  64. 6AK6 low power tube amp finished
  65. 7 pin X
  66. Replacing KT88 with KT90 - Beginner's questions
  67. way to estimate choke current rating?
  68. attn: Montreal, QC, Canada, OPAMPS!
  69. Hiss but no hum...
  70. Cap size for Aikido heater PS?
  71. Heathkit W-5M
  72. NTK " Teds tube mic"
  73. Making a Bias Voltage from B+ tape?
  74. Reg. Heater Circuit
  75. 6AG7 UL Curves
  76. Best SE output transformer for 300b - shootout
  77. Single ended amp from class A push-pull
  78. Yaqin MC-100b schematic diagram
  79. 12/24 volt tubes
  80. Favorite noval hi gain dual triode?
  81. AVO MKIII Tester Operation?
  82. Aikido users- anyone NOT have turn-off thump?
  83. Optimum value for volume control?
  84. VAL MPS mark II preamp gain reduction
  85. It is asked drawing 100 or 200 watts amplifier
  86. Mystery ST-70 Driver Board
  87. First Timer needs help
  88. Help. Bogen m60a
  89. grid-grounded preamp sound
  90. Rectifier switching / choke ringing noise
  91. Single Ended Amp Design -- Help Needed
  92. tube current
  93. Needed : ECF83, can anyone help ??
  94. Problem with a solid state CCS
  95. Looking for low-ish rp single triode
  96. Cleaning beverage out of inside tube amp
  97. Aikido problems!!!
  98. Another Power Supply Question
  99. 2a3 output transformers....
  100. yet another 6em7 amp
  101. zenith amp
  102. 6AG7 Amplifier
  103. Valve Power Supplies?
  104. tube tracer article
  105. PCB design techniques for Tube Amps
  106. Adjectives for tube sound!
  107. Question about Amperex tubes and a preamp
  108. I want to build a preamp for my dad.. thoughts?
  109. Constant Current DC Heater Supply
  110. Which valves for MF CD-T
  111. 6C33C-EB / 6C33C-EV extended life ?
  112. Yamamoto A-08S RCA 45 tube amplifier original schematic
  113. Audiovalve RKV schematic (hybrid headphones amp)
  114. Music Angel EL34 XDSE
  115. Dynaco PAS Preamp Tone Controls
  116. build 805 or 845 se for ~$1000
  117. Built a quick 26 pre yesterday..nice so far,,
  118. An UL preamp idea.
  119. 6BX7 PSpice Model?
  120. using 24G and 3B28 in an od ball amp.......
  121. Tube Line Buffer
  122. Please help me build an amp for my father
  123. Why is my phono amp fatiguing?
  124. Heater current drawn by 8416
  125. want dead counterpoint SA100 SA-100 in good cosmetics
  126. Cathode Followers and Clipping
  127. transformer secondary connections
  128. imp amp
  129. Information 6DJ8
  130. Smoothing Cap = Noise Source?
  131. 6S19P budget SE.
  132. My 2 new latest Dynaco ST-70's
  133. help with KT88 / mikaels SE amp
  134. adding LEDs to amp head
  135. What Is Line Level????
  136. chokes, caps, and long distance relationships
  137. First foray into tubes!!
  138. Simple Hi-end 845 amplifier
  139. increased choke inductance - recommended?
  140. HELP PLEASE - with preamp design
  141. Alternative to James OPTs
  142. DIY preamp tube: Audio Research Reference 3???
  143. Crowhurst's Twin Coupled Amplifier
  144. 6lw6 tv sweep tube bias?
  145. 24V aikido build!
  146. magnavox tube radio
  147. New S5 L series kits
  148. Anyone has experience with Stranwood
  149. 6n6p amp
  150. DC Darling Amp Buzzing on both channels.
  151. 6SL7 EL34 300B amp
  152. I just installed Yeos (DIY Paradise) DC Blocker
  153. Measuring Cathode Current
  154. Need the Ogirin Circuit of Bruce Berman
  155. Input Choke Too Small
  156. Poodle gives clues to capacitor construction
  157. Would a line stage/preamp be beneficial? NEWBIE question
  158. 6p45c
  159. fanon pa amp schematic
  160. line stage confusion
  161. Hammond Transformer Secondary Connections
  162. Klimo Merlin LS Tube Power Supply
  163. OPT Design Assistante (EL84)
  164. Hum - can't find an answer by searching the forum
  165. Please critique my plans for a WE91 clone.
  166. Emission Labs 300B Mesh plate
  167. DRD Power Supply
  168. Octal Champ works - pls check design
  169. telefunken EL 34 audio tube
  170. Bias instability in Heathkit W-5M amp
  171. EL-34 instability in EICO HF-35 amp
  172. Russian paper in oil caps - any good?
  173. Matching Impedances
  174. Open-Source Audio Input Switch
  175. Phono pre amp RF problem
  176. Best CHEAP + best BEST current production EL34?
  177. New toy
  178. EL84 SEP schematic. Some questions.
  179. Referencing DC heaters to cathode
  180. Need advice on Val Audio amp with EL-34 Tubes
  181. Please help a newbie with PSU current requirement for Aikido linestage
  182. Loudspeaker noise from 300B
  183. Schematic for GU-50, EL34, 6J32P ???
  184. alternative for heater / B+ references
  185. need a little help from some tube Gurus!!!
  186. EF86 + SPICE = no noise contribution?
  187. 6n1 tube = 6n1p
  188. One channel softer than the other, humming and buzzing
  189. Parallel Output Transformers
  190. Distortion from heater sag?
  191. Testing 5842 / 417a
  192. RH ECL86 Amp: Dave?
  193. High gain pentodes
  194. Tube Matching and Push-Pull
  195. What constitutes a leaky Coupling capacitor?
  196. Question on Input Connections
  197. s5electronics tube amp kit damping factor
  198. 6L6s and cabinet selections HELP!!!!
  199. source of nickel + silicon steel laminations
  200. Explanation for this problem?
  201. turn off thump
  202. Pop from amp when turning off
  203. Big Paper in Oil Caps
  204. Valve noobie asks for help / advice
  205. Polypropylene vs electrolytic in Power supply
  206. 6S4P vs 5842
  207. Calibrating Your Hickok Tube Tester
  208. Which 2A3 ?
  209. New design: 12V push-pull tube amplifier
  210. hybrid power supply: diode bridge into diode tube
  211. heater reference to B+ and buzzing trafo
  212. Hum cancelling scheme?
  213. Run a transformer backwards?
  214. FIVRE RRCF info needed
  215. Siemens Valvo ED-8000
  216. My last Zamir Aleph
  217. Questions about first tube PSU!
  218. Looking for site
  219. Heater voltage mismatch
  220. Contacting Pete Millet for 813 PSU?
  221. Suggestions for first tube project?
  222. Just Saying Howdy
  223. Wiring a tube rectifier PSU
  224. Looking for a small yet powerful pentode / dual triode?
  225. Earth Bus Wire - Where can I get it?
  226. Tube Amp Startup
  227. 45 amplifier
  228. Noob saying Hi...
  229. Maida regulator
  230. Sensitivity limiter in Bogen MX60a
  231. Just finished first amp
  232. 6080 / 6AS7G power amplifier
  233. Schematics
  234. General questions before finishing up ST-35 clone
  235. Will a 12AX7 sub. for 12DW7/7247?
  236. Deutsche Wurlitzer Lyric Jukebox?
  237. Made in China buyer beware...
  238. Variac to power-up Beveridge OTLs?
  239. Any ideas on how old this is?
  240. Philips Tube radio
  241. Improve Avel toroid in OTL amp
  242. tube pre amp mods in queensland, australia
  243. 6SL7GT pre-amp
  244. Aikido circuit question
  245. question
  246. Edcor OPT's w/ SimpleSE
  247. Please check this PSU
  248. met. MKP in oil capacitors for PSU?
  249. EH EL34's at +600V?
  250. The Infamous Kay 703C! - Help finding an output transformer?

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