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  1. How much feedback for PP penthode?
  2. To regulate or not to regulate
  3. Anyone used interstage transformers for a 300B?
  4. Hissing Sound in KT88 Amp
  5. Go black or go around?
  6. Triodes that would like a 10K a-a OPT?
  7. Yaqin mc10L
  8. Cycline3 on the 12AU7
  9. How Would You Change This Soildstate Circuit To Tube
  10. Using existing transformer winding to provide and additional supply
  11. Magnetic shields for transformers
  12. First DIY job: Dual Tube Recording Preamp
  13. James Transformers
  14. Audiopax Model 7
  15. Isis 3030 Monoblocks
  16. From diode to tube rectification in my Aikido
  17. Williamson KT77 Question
  18. mu followers --- current --- please help
  19. need tube schematic
  20. switch snubber for Aikido
  21. Pioneer Tube Schematics
  22. Question about "bloaty" bass with SET and KT88's
  23. Ultron 6v6GT
  24. low power OTLs
  25. 6H30 equivalents
  26. What Would You Do?
  27. k-502/k-12m vs. Model 1 pcl82
  28. Shunting Pot
  29. Suggested replacements for Chinese tubes
  30. What to do with these.....
  31. ECL82 PP "reference" amp
  32. Heater TX proximity
  33. Quick question on the PP-C1 amp
  34. SET "interstage coupler" for First Watt F4
  35. 811A amp Class A2
  36. TVC before Input Transformer?
  37. Point-to-Point, Pointers
  38. Triode recommendation
  39. Schmitt & CCS
  40. Simple DC Heater Supply
  41. Output transformers ? sound quality ?
  42. KT88 Minimum Mounting Distance
  43. LED bias indicator
  44. Standby Switch
  45. chinese tube amp
  46. Broskie OTL
  47. Connecting a single plate to multiple screens?
  48. voltage divider+Aikido
  49. Wiring PSU and Aikido PCB
  50. Mission 300b parallel single ended
  51. Vietnam tube amplifier festival
  52. learning design but need help
  53. tutorial software
  54. Fisher 500C troubleshooting
  55. triode pentodes
  56. Deriving Secondary Voltages
  57. Here's the W-5M schematics . . .
  58. Question for Heathkit W-5M owners
  59. Classic 16.0
  60. 100 Ohm loudspeaker
  61. Are Srpp's Any Good (please Help)
  62. Blasphemy, I'm sure
  63. Decware ZSLA buffer -- worth cloning?
  64. Pse El84
  65. 6S19P Push-Pull Amplifier
  66. Class B Triodes
  67. Need a serious PP driver stage
  68. laptop->tubes?
  69. cathode follower -- damping factor (HELP please)
  70. Interstage X-former identification
  71. Multi-turn pot?
  72. 6L6G and 6L6GB differences?
  73. 6AK6 low power tube amp finished
  74. 7 pin X
  75. Replacing KT88 with KT90 - Beginner's questions
  76. way to estimate choke current rating?
  77. attn: Montreal, QC, Canada, OPAMPS!
  78. Hiss but no hum...
  79. Cap size for Aikido heater PS?
  80. Heathkit W-5M
  81. NTK " Teds tube mic"
  82. Making a Bias Voltage from B+ tape?
  83. Reg. Heater Circuit
  84. 6AG7 UL Curves
  85. Best SE output transformer for 300b - shootout
  86. Single ended amp from class A push-pull
  87. Yaqin MC-100b schematic diagram
  88. 12/24 volt tubes
  89. Favorite noval hi gain dual triode?
  90. AVO MKIII Tester Operation?
  91. Aikido users- anyone NOT have turn-off thump?
  92. Optimum value for volume control?
  93. VAL MPS mark II preamp gain reduction
  94. It is asked drawing 100 or 200 watts amplifier
  95. Mystery ST-70 Driver Board
  96. First Timer needs help
  97. Help. Bogen m60a
  98. grid-grounded preamp sound
  99. Rectifier switching / choke ringing noise
  100. Single Ended Amp Design -- Help Needed
  101. tube current
  102. Needed : ECF83, can anyone help ??
  103. Problem with a solid state CCS
  104. Looking for low-ish rp single triode
  105. Cleaning beverage out of inside tube amp
  106. Aikido problems!!!
  107. Another Power Supply Question
  108. 2a3 output transformers....
  109. yet another 6em7 amp
  110. zenith amp
  111. 6AG7 Amplifier
  112. Valve Power Supplies?
  113. tube tracer article
  114. PCB design techniques for Tube Amps
  115. Adjectives for tube sound!
  116. Question about Amperex tubes and a preamp
  117. I want to build a preamp for my dad.. thoughts?
  118. Constant Current DC Heater Supply
  119. Weekend Fun with Tubes - Guitar Preamp
  120. Which valves for MF CD-T
  121. 6C33C-EB / 6C33C-EV extended life ?
  122. Yamamoto A-08S RCA 45 tube amplifier original schematic
  123. Audiovalve RKV schematic (hybrid headphones amp)
  124. Music Angel EL34 XDSE
  125. Dynaco PAS Preamp Tone Controls
  126. build 805 or 845 se for ~$1000
  127. Built a quick 26 pre yesterday..nice so far,,
  128. An UL preamp idea.
  129. 6BX7 PSpice Model?
  130. using 24G and 3B28 in an od ball amp.......
  131. Tube Line Buffer
  132. Please help me build an amp for my father
  133. Why is my phono amp fatiguing?
  134. Heater current drawn by 8416
  135. want dead counterpoint SA100 SA-100 in good cosmetics
  136. Cathode Followers and Clipping
  137. transformer secondary connections
  138. imp amp
  139. Information 6DJ8
  140. Smoothing Cap = Noise Source?
  141. peavey ultra 60 footswitch wiring diagram
  142. 6S19P budget SE.
  143. adding reverb to a PA head
  144. My 2 new latest Dynaco ST-70's
  145. help with KT88 / mikaels SE amp
  146. twin reverb 100 watt
  147. adding LEDs to amp head
  148. What Is Line Level????
  149. chokes, caps, and long distance relationships
  150. First foray into tubes!!
  151. Simple Hi-end 845 amplifier
  152. increased choke inductance - recommended?
  153. HELP PLEASE - with preamp design
  154. Alternative to James OPTs
  155. DIY preamp tube: Audio Research Reference 3???
  156. Crowhurst's Twin Coupled Amplifier
  157. 6lw6 tv sweep tube bias?
  158. 24V aikido build!
  159. magnavox tube radio
  160. New S5 L series kits
  161. Anyone has experience with Stranwood
  162. 6n6p amp
  163. DC Darling Amp Buzzing on both channels.
  164. 6SL7 EL34 300B amp
  165. I just installed Yeos (DIY Paradise) DC Blocker
  166. Measuring Cathode Current
  167. Need the Ogirin Circuit of Bruce Berman
  168. Input Choke Too Small
  169. Poodle gives clues to capacitor construction
  170. Would a line stage/preamp be beneficial? NEWBIE question
  171. 6p45c
  172. fanon pa amp schematic
  173. line stage confusion
  174. Hammond Transformer Secondary Connections
  175. Klimo Merlin LS Tube Power Supply
  176. OPT Design Assistante (EL84)
  177. Hum - can't find an answer by searching the forum
  178. Please critique my plans for a WE91 clone.
  179. Emission Labs 300B Mesh plate
  180. DRD Power Supply
  181. Octal Champ works - pls check design
  182. telefunken EL 34 audio tube
  183. Bias instability in Heathkit W-5M amp
  184. EL-34 instability in EICO HF-35 amp
  185. Russian paper in oil caps - any good?
  186. Matching Impedances
  187. Open-Source Audio Input Switch
  188. Phono pre amp RF problem
  189. Best CHEAP + best BEST current production EL34?
  190. New toy
  191. EL84 SEP schematic. Some questions.
  192. Referencing DC heaters to cathode
  193. Need advice on Val Audio amp with EL-34 Tubes
  194. Please help a newbie with PSU current requirement for Aikido linestage
  195. Loudspeaker noise from 300B
  196. Schematic for GU-50, EL34, 6J32P ???
  197. alternative for heater / B+ references
  198. need a little help from some tube Gurus!!!
  199. EF86 + SPICE = no noise contribution?
  200. 6n1 tube = 6n1p
  201. One channel softer than the other, humming and buzzing
  202. Parallel Output Transformers
  203. Distortion from heater sag?
  204. Testing 5842 / 417a
  205. RH ECL86 Amp: Dave?
  206. High gain pentodes
  207. Tube Matching and Push-Pull
  208. What constitutes a leaky Coupling capacitor?
  209. Question on Input Connections
  210. s5electronics tube amp kit damping factor
  211. 6L6s and cabinet selections HELP!!!!
  212. source of nickel + silicon steel laminations
  213. Explanation for this problem?
  214. turn off thump
  215. Pop from amp when turning off
  216. Big Paper in Oil Caps
  217. Valve noobie asks for help / advice
  218. Polypropylene vs electrolytic in Power supply
  219. 6S4P vs 5842
  220. Calibrating Your Hickok Tube Tester
  221. Which 2A3 ?
  222. New design: 12V push-pull tube amplifier
  223. hybrid power supply: diode bridge into diode tube
  224. heater reference to B+ and buzzing trafo
  225. Hum cancelling scheme?
  226. Run a transformer backwards?
  227. FIVRE RRCF info needed
  228. Siemens Valvo ED-8000
  229. 6J5 and 6F6 SE - enough gain for guitar?
  230. My last Zamir Aleph
  231. Questions about first tube PSU!
  232. Looking for site
  233. Heater voltage mismatch
  234. Contacting Pete Millet for 813 PSU?
  235. Suggestions for first tube project?
  236. Just Saying Howdy
  237. Wiring a tube rectifier PSU
  238. Looking for a small yet powerful pentode / dual triode?
  239. Earth Bus Wire - Where can I get it?
  240. Tube Amp Startup
  241. 45 amplifier
  242. Noob saying Hi...
  243. Maida regulator
  244. Sensitivity limiter in Bogen MX60a
  245. Just finished first amp
  246. 6080 / 6AS7G power amplifier
  247. Schematics
  248. General questions before finishing up ST-35 clone
  249. Will a 12AX7 sub. for 12DW7/7247?
  250. Deutsche Wurlitzer Lyric Jukebox?

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