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  1. Further Troubleshooting Simple SE
  2. What is the purpose of the g2 bypass cap?
  3. questionable 2a3 schematic
  4. overdrive circuit for hammond organs(need help)
  5. A singular experiment with a unheated tube.
  6. Limited bass response in one channel
  7. Show me your fave phonostage circuits.
  8. tube heater voltage, how much is too much?
  9. Para feed choke
  10. Dynaco ST35 power?
  11. Tips/comments for upcoming 300B build
  12. page Eli Duttman's Simple p-p with 5965 MQ EXO-173 and 6AQ5
  13. DHT cathode follower idea
  14. GK71 Output Transformer
  15. Schematics for A.I. Mod 2D
  16. Determing Battery Voltage for cathode bias
  17. OT for audio but still tube
  18. Getting transfer characteristics
  19. Pentodes and Choke Loading
  20. Stepped airgap choke ?
  21. Noob question
  22. SE 300B Integrated Amp: Help choose circuit design
  23. SunAudio 2A3 to 300B
  24. Filament Snubber Cap Explodes! What happened?
  25. Alot of 12AX7's about
  26. DIY tube microphone preamp
  27. Tube tester and PSUD II questions
  28. Wurlitzer/Fisher Amp Musings
  29. please check my work
  30. How to get cathode bias info from grid bias info?
  31. SE 300B Integrated Amp: Transformers
  32. Positive feedback, improperly drawn screen, or WTF?
  33. GE Console RC 7100 A - need some help!
  34. Output tube for 600V B+, 5800 ohm primary PP, tertiary 25% UL taps?
  35. Still tring to find a couple 100uf motor runs
  36. small push-pull amp to preamp
  37. Electraprint EL84 PP with PSA-2N
  38. OpAmp Swap?
  39. Bogen MX-60A- output transformer bandwidth?
  40. 6AS7 Parallel Feed Amp
  41. PSpice model of output transformer
  42. simple guitar push pull amp
  43. Siemens capacitor
  44. Super 6BG6 vs. 6550
  45. 5687 line stage
  46. Audio Standards
  47. 4 x used 5867A (TB3/750) triodes
  48. 12au7 who has the best ultra low noise ???
  49. Questions about tweaking the Miniblok SET...
  50. The core -sonic reasons
  51. Removing pot from valve pre amp
  52. Power transformer question
  53. Tube construction materials
  54. LTP second grid
  55. How to figure out the bias point of fisher X-100A
  56. Schematic help! (Bell)
  57. Audio Note Soro SE SCHEMATICS
  58. 807 Tube Triode Connected
  59. Would you pls help.
  60. came across this nice 200W tube amp schematic
  61. Anyone seen this amp topology before?
  62. Max. grid resistance
  63. Yaqin mc10l "popping"
  64. Audio Electronics Supply
  65. Alamo Fury 2566
  66. My friends in the USA - tube stores in LA
  67. Can this marraige work?
  68. RJM with 12AY7
  69. Bias winding to power sand
  70. FM Tube radio design
  71. What do you use? Not technical but relative.
  72. looking for a pre-amp schematic
  73. I have waay too many 6DJ8's
  74. Tango NP126
  75. Two 6J5 versus one 6SN7
  76. Bunch of questions regarding plate CCS and some else.
  77. Tube Store in Washington DC (6C33C Triode Buy Where??)
  78. Scott 399 Receiver Schematics?
  79. Need help with 6l6GC choices
  80. Need Hammond/Everett drawings.
  81. 6V6 PP-based Baby Huey/Mullard inspired design needed...
  82. Ecf80
  83. Please Explain difference Mono vs Push Pull vs Single End etc
  84. VU Meters
  85. diy preamps, bottlehead, decware....
  86. Power supply choke help needed
  87. LED cathode biasing in push-pull input stage
  88. applying fixed bias to cathode followers
  89. Battieries for B+
  90. Put amp in chassis, then, right channel doesn't work!
  91. hammond transformers?
  92. Two Rectifiers, One transformer
  93. Cool problem with Marshall TSL!!!
  94. Tubes currently in production
  95. Rachel's Corner - Shuguang
  96. Small 50C5 Amp improvements
  97. Low voltage pentode?
  98. TX distortion
  99. DIY U-L curves
  100. Transformer spacing
  101. Covers for budget output transformers
  102. Correct for bipolar voltage doubler?
  103. Source for 100uf motor run cap.
  104. magnavox 185aa with 4-6v6
  105. Yaqin 300B re-biasing
  106. Line Amp Diy 6j1
  107. Diy Line Amp£_£_6sn7
  108. Diy Line Amp Audio Note M7
  109. Diy Line Amp Cat Sl-1
  110. Diy Line Amp Malanz 7
  111. Diy Line Amp Htm
  112. Diy Line Amp 5670
  113. Diy Line Amp Jp-80
  114. Quality difference between output transformers
  115. A group-build project for a tube power amp in India
  116. pilot light ideas please
  117. Small signal pentode - zener screen regulation - why not ??
  118. Another KT-88
  119. Rod Coleman filament supply circuit boards
  120. Losing the treble and transient response in this PX25 SE amp
  121. Calculating Zout for Pentode amp with NFB?
  122. Bypassing a volume pot
  123. Lab supply for cathode bias experiment question..
  124. Rheostat for adjustable "fixed" bias?
  125. Output transformer Question
  126. Real Cost of Decware Amplifiers
  127. Digitally driven tube pre-amp
  128. Real cost of Dynaco ST 70 Kits
  129. Fake electrolytics?
  130. Oddball Console Amplifier
  131. Transistor phase splitter (Yaqin MC-84L)
  132. Shuguang to stop 845 and 211
  133. first project.
  134. Help on capacitor info...
  135. Se Kt-66
  136. Is there a power supply guru?
  137. Direct Coupling question
  138. What's the best way to hook up an Isolation transformer
  139. Marzio &Jelasi's Direct Coupled SE Amp
  140. 6SN7 or 6SN7GT??
  141. HY40 Power Triode
  142. parallel capacitors in PS question
  143. Looking for feedback on Bottlehead amps
  144. First Watt F3 / Tube Audio Design TAD-125 Hibachi JFET amps
  145. S-5 Push Pull Power Supply Upgrade!
  146. Capacitor voltage rating conversion
  147. Output Transformer Air Gap
  148. PCF80 -Designing a Pentode Constant Current Sink - help needed.
  149. Purity and simplicity of amp design
  150. watt meters
  151. DIY Dynaco ST70
  152. Help need some info on this Raytheon
  153. Isolating parallel feed amplifiers
  154. Please help for B+ problem!
  155. Second Tubelab Simple SE board done
  156. "Sallen-Key" Public domain?
  157. Transformer questions / Good headphones?
  158. Which Spud Amp?
  159. Very simple SE Triode Help
  160. Tube friendly speakers
  161. Counterpoint SA5000 schematic
  162. Yaqin MC-10L
  163. Screen Driven Dissimilar Pentode SE Anti-Triode Spud
  164. Power tube bias increasing with signal.
  165. Preamp suggestion required pls
  166. How to change deemphasis from 75uS to 50uS for Fisher FM100
  167. Which 300B ?
  168. Custom OT for 6C33C tube - any advice
  169. s-5 tube amp hum troubles
  170. Cathode feedback on Mikael's SE KT88?
  171. RCA tube rectifier
  172. 300B Schematic
  173. Tubelab wiring
  174. My first amp!
  175. Building a Aikido preamplifier
  176. Tube rolling causes failure...
  177. Briefly subjected heaters to about 12v by accident.
  178. She lives!
  179. Wilcox Gay 5U
  180. 6EM7 project: maybe use more sand?
  181. 12B4A SET - any critiques on this project?
  182. Heathkit Manual
  183. What is this??
  184. Amp and Speakers decision
  185. Hey guitar joe...
  186. Question about Low Impedence Filters on a Bogen PA Head Need Info.
  187. counterpoint 3.1
  188. good book for learning the basics of tubes and tube amps
  189. Heater circuit - to twist or not to twist
  190. Rock and Flame: Wavebourn Barracuda
  191. Low voltage rectifiers?
  192. Horz Sweep amp Pent or screen drive
  193. Lessons learned building a 5VDC Power Supply for a 300B heater
  194. Getting frustrated--- amps and speakers for the noob
  195. Smallish chassis feasible? Multiple pics
  196. Using a Maida Regulator with a CCS
  197. Which Aikido pre-amp PCB for a newbie?
  198. Newbie wants to build Tubelab SE Monos.
  199. FM transmitter / PA
  200. What value attenuator would you use in front of a 396A in a preamp?
  201. Hybrid OTL Circlotron idea
  202. Heathkit aa-121
  203. Help please checking my B+ design
  204. Selenium rectifiers
  205. isolation transformer - high voltage.
  206. Cathode Bypass in a PP Output Stage
  207. Mcintosh Tube Amplifier Protection Circuit
  208. Where to start? Or: cool these plates down
  209. epiphone pacemaker 50 t
  210. Hum trouble on old PA amp
  211. Crazy newbie tube driver question
  212. UHF tubes for audio?
  213. Suggestion for this tube preamp
  214. PCB Board software?
  215. 300B push pull amp
  216. Simple P-P 84 proto
  217. Keeping cost down?
  218. Tube Amp Kit for newbie
  219. 40% Tap direct to plate
  220. Funny bias problem in PP EL34. Please help
  221. Transformer from Heathkit A-7 amp
  222. Any tube stores in Burnaby, Vancouver, Canada?
  223. B+ time delay circuit - your comments
  224. PCB mount line input transformer question
  225. SRPP circuit question
  226. Russian tubes - what pin material?
  227. Auto-bias - easy to convert to or not?
  228. old style anode/grid caps
  229. 6H30 Dual Triode
  230. Why would the frequency response vary so much on a pair of Monoblock amps?
  231. Disassembling output transformer
  232. Tube sockets
  233. H. P. Friedrichs
  234. The Rebuilding of Theta KT-88 Tube amp.
  235. Please check my PS pcb board layout for problems????
  236. glass capacitors
  237. Help w/fixing counterpoint Sa7 preamp
  238. IXYS 10M45 CCS IC question
  239. Wing-C 300B tubes and opinions
  240. PX25 DRD Power amp.
  241. rectifier tube recommendation please
  242. 6C33C to more standard triode conversion - any ideas?
  243. PP EL84 Build Questions (Bevois Valley)
  244. Tube line stage output impedance
  245. volume between gain stages
  246. Dyna ST70 PWR Tranny 6.3V Crnt Spec?
  247. Next Project - Darling Amplifier or 45
  248. tube magazines
  249. PSU choke help please
  250. PCB Trace properties for PP tube amplifier ( 12AQ5, 6v6 etc)

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