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  1. Tentlabs Neg Bias Vs Machmat AFB
  2. Looking for 12AT7/ECC81 phonostage schematic
  3. 6AV5 PP amp Design Review
  4. 6sn7 Preamp power supply
  5. Please: tube kit for <$300?
  6. making a load line
  7. Telefunken Consoles: not just for tube and iron scavenging!
  8. Genalex Gold Lion KT77
  9. driving HD600
  10. Counterpoint SA-3000
  11. Phono stage for 2 7F7s (stereo) plus buffer?
  12. Help and your input on YAQIN MC10L EL34
  13. EL Cheapo Quad amplifier???
  14. Noob questions about a K-12/K-502 kit
  15. 3 quick transformer questions
  16. Push Pull Output tranies for SE amp?
  17. Tube Rectifier Capacitance?
  18. rca 189 b console amps need more info
  19. upgrade transformer?
  20. Parasitic oscillation? (picture)
  21. newbie question : driver/output relationship, input sensitivity
  22. Unknown tube logo
  23. Impedance, the 10x rule, losses & bandwidth
  24. el84/6bq5 PSE
  25. A very odd phase inverter- comments?
  26. Please check my work :)
  27. NOS purchase, should I be concerned?
  28. Strange splitter in the Audio Research D4
  29. 6ak5/5654 plate resistance
  30. Further Troubleshooting Simple SE
  31. What is the purpose of the g2 bypass cap?
  32. questionable 2a3 schematic
  33. overdrive circuit for hammond organs(need help)
  34. A singular experiment with a unheated tube.
  35. Limited bass response in one channel
  36. Show me your fave phonostage circuits.
  37. tube heater voltage, how much is too much?
  38. Para feed choke
  39. Dynaco ST35 power?
  40. Tips/comments for upcoming 300B build
  41. page Eli Duttman's Simple p-p with 5965 MQ EXO-173 and 6AQ5
  42. DHT cathode follower idea
  43. GK71 Output Transformer
  44. Schematics for A.I. Mod 2D
  45. Determing Battery Voltage for cathode bias
  46. OT for audio but still tube
  47. Getting transfer characteristics
  48. Pentodes and Choke Loading
  49. Stepped airgap choke ?
  50. Noob question
  51. SE 300B Integrated Amp: Help choose circuit design
  52. SunAudio 2A3 to 300B
  53. Filament Snubber Cap Explodes! What happened?
  54. Alot of 12AX7's about
  55. DIY tube microphone preamp
  56. Tube tester and PSUD II questions
  57. Wurlitzer/Fisher Amp Musings
  58. please check my work
  59. How to get cathode bias info from grid bias info?
  60. SE 300B Integrated Amp: Transformers
  61. Positive feedback, improperly drawn screen, or WTF?
  62. GE Console RC 7100 A - need some help!
  63. Output tube for 600V B+, 5800 ohm primary PP, tertiary 25% UL taps?
  64. Still tring to find a couple 100uf motor runs
  65. small push-pull amp to preamp
  66. Electraprint EL84 PP with PSA-2N
  67. OpAmp Swap?
  68. Bogen MX-60A- output transformer bandwidth?
  69. 6AS7 Parallel Feed Amp
  70. PSpice model of output transformer
  71. simple guitar push pull amp
  72. Siemens capacitor
  73. Super 6BG6 vs. 6550
  74. 5687 line stage
  75. Audio Standards
  76. 4 x used 5867A (TB3/750) triodes
  77. 12au7 who has the best ultra low noise ???
  78. Questions about tweaking the Miniblok SET...
  79. The core -sonic reasons
  80. Removing pot from valve pre amp
  81. Power transformer question
  82. Tube construction materials
  83. LTP second grid
  84. How to figure out the bias point of fisher X-100A
  85. Schematic help! (Bell)
  86. Audio Note Soro SE SCHEMATICS
  87. 807 Tube Triode Connected
  88. Would you pls help.
  89. came across this nice 200W tube amp schematic
  90. Anyone seen this amp topology before?
  91. Max. grid resistance
  92. Yaqin mc10l &quot;popping&quot;
  93. Audio Electronics Supply
  94. Alamo Fury 2566
  95. My friends in the USA - tube stores in LA
  96. Can this marraige work?
  97. RJM with 12AY7
  98. Bias winding to power sand
  99. FM Tube radio design
  100. What do you use? Not technical but relative.
  101. looking for a pre-amp schematic
  102. I have waay too many 6DJ8's
  103. Tango NP126
  104. Two 6J5 versus one 6SN7
  105. Bunch of questions regarding plate CCS and some else.
  106. Tube Store in Washington DC (6C33C Triode Buy Where??)
  107. Scott 399 Receiver Schematics?
  108. Need help with 6l6GC choices
  109. Need Hammond/Everett drawings.
  110. 6V6 PP-based Baby Huey/Mullard inspired design needed...
  111. Ecf80
  112. Please Explain difference Mono vs Push Pull vs Single End etc
  113. VU Meters
  114. diy preamps, bottlehead, decware....
  115. Power supply choke help needed
  116. LED cathode biasing in push-pull input stage
  117. applying fixed bias to cathode followers
  118. Battieries for B+
  119. Put amp in chassis, then, right channel doesn't work!
  120. hammond transformers?
  121. Two Rectifiers, One transformer
  122. Cool problem with Marshall TSL!!!
  123. Tubes currently in production
  124. Rachel's Corner - Shuguang
  125. Small 50C5 Amp improvements
  126. Low voltage pentode?
  127. TX distortion
  128. DIY U-L curves
  129. Transformer spacing
  130. Covers for budget output transformers
  131. Correct for bipolar voltage doubler?
  132. Source for 100uf motor run cap.
  133. magnavox 185aa with 4-6v6
  134. Yaqin 300B re-biasing
  135. Line Amp Diy 6j1
  136. Diy Line Amp£_£_6sn7
  137. Diy Line Amp Audio Note M7
  138. Diy Line Amp Cat Sl-1
  139. Diy Line Amp Malanz 7
  140. Diy Line Amp Htm
  141. Diy Line Amp Jp-80
  142. Diy Line Amp 5670
  143. Quality difference between output transformers
  144. A group-build project for a tube power amp in India
  145. pilot light ideas please
  146. Small signal pentode - zener screen regulation - why not ??
  147. Another KT-88
  148. Rod Coleman filament supply circuit boards
  149. Losing the treble and transient response in this PX25 SE amp
  150. Calculating Zout for Pentode amp with NFB?
  151. Bypassing a volume pot
  152. Lab supply for cathode bias experiment question..
  153. Rheostat for adjustable "fixed" bias?
  154. Output transformer Question
  155. Real Cost of Decware Amplifiers
  156. Digitally driven tube pre-amp
  157. Real cost of Dynaco ST 70 Kits
  158. Fake electrolytics?
  159. Oddball Console Amplifier
  160. Transistor phase splitter (Yaqin MC-84L)
  161. Shuguang to stop 845 and 211
  162. first project.
  163. Help on capacitor info...
  164. Se Kt-66
  165. Is there a power supply guru?
  166. Direct Coupling question
  167. What's the best way to hook up an Isolation transformer
  168. Marzio &Jelasi's Direct Coupled SE Amp
  169. 6SN7 or 6SN7GT??
  170. HY40 Power Triode
  171. parallel capacitors in PS question
  172. Looking for feedback on Bottlehead amps
  173. First Watt F3 / Tube Audio Design TAD-125 Hibachi JFET amps
  174. S-5 Push Pull Power Supply Upgrade!
  175. Capacitor voltage rating conversion
  176. Output Transformer Air Gap
  177. PCF80 -Designing a Pentode Constant Current Sink - help needed.
  178. Purity and simplicity of amp design
  179. watt meters
  180. DIY Dynaco ST70
  181. Help need some info on this Raytheon
  182. Isolating parallel feed amplifiers
  183. Please help for B+ problem!
  184. Second Tubelab Simple SE board done
  185. "Sallen-Key" Public domain?
  186. Transformer questions / Good headphones?
  187. Which Spud Amp?
  188. Very simple SE Triode Help
  189. Tube friendly speakers
  190. Counterpoint SA5000 schematic
  191. Yaqin MC-10L
  192. Screen Driven Dissimilar Pentode SE Anti-Triode Spud
  193. Power tube bias increasing with signal.
  194. Preamp suggestion required pls
  195. How to change deemphasis from 75uS to 50uS for Fisher FM100
  196. Which 300B ?
  197. Custom OT for 6C33C tube - any advice
  198. s-5 tube amp hum troubles
  199. Cathode feedback on Mikael's SE KT88?
  200. RCA tube rectifier
  201. 300B Schematic
  202. Tubelab wiring
  203. My first amp!
  204. Building a Aikido preamplifier
  205. Tube rolling causes failure...
  206. Briefly subjected heaters to about 12v by accident.
  207. She lives!
  208. Wilcox Gay 5U
  209. 6EM7 project: maybe use more sand?
  210. 12B4A SET - any critiques on this project?
  211. Heathkit Manual
  212. What is this??
  213. Amp and Speakers decision
  214. Hey guitar joe...
  215. Question about Low Impedence Filters on a Bogen PA Head Need Info.
  216. counterpoint 3.1
  217. good book for learning the basics of tubes and tube amps
  218. Heater circuit - to twist or not to twist
  219. Rock and Flame: Wavebourn Barracuda
  220. Low voltage rectifiers?
  221. Horz Sweep amp Pent or screen drive
  222. Lessons learned building a 5VDC Power Supply for a 300B heater
  223. Getting frustrated--- amps and speakers for the noob
  224. Smallish chassis feasible? Multiple pics
  225. Using a Maida Regulator with a CCS
  226. Which Aikido pre-amp PCB for a newbie?
  227. Newbie wants to build Tubelab SE Monos.
  228. FM transmitter / PA
  229. What value attenuator would you use in front of a 396A in a preamp?
  230. Hybrid OTL Circlotron idea
  231. Heathkit aa-121
  232. Help please checking my B+ design
  233. Selenium rectifiers
  234. isolation transformer - high voltage.
  235. Cathode Bypass in a PP Output Stage
  236. Mcintosh Tube Amplifier Protection Circuit
  237. Where to start? Or: cool these plates down
  238. epiphone pacemaker 50 t
  239. Hum trouble on old PA amp
  240. Crazy newbie tube driver question
  241. UHF tubes for audio?
  242. Suggestion for this tube preamp
  243. PCB Board software?
  244. 300B push pull amp
  245. Simple P-P 84 proto
  246. Keeping cost down?
  247. Tube Amp Kit for newbie
  248. 40% Tap direct to plate
  249. Funny bias problem in PP EL34. Please help
  250. Transformer from Heathkit A-7 amp

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