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  1. Speaker impedance questions (SE KT88)
  2. Spud-Assist: Totem-Pole Current-Mirror PP Hybrid
  3. my 6922 / E88CC preamp
  4. For the moderator
  5. 3 amps for HE speakers
  6. Pentode sounds great
  7. Shindo claret
  8. james 6123hs
  9. 6550 Amplifier
  10. ARC Ls 15 Schematic
  11. Super spud-amp?
  12. Basic Oscilloscope Usage Questions
  13. Grounded Cathode phase?
  14. Simple SE, how to wire CFB with outputs for different speaker impedances?
  15. PCB Board designer?
  16. Speaker for your low power tube amp?
  17. Tube collection Database.
  18. E288cc value?
  19. Hi End Tube Project
  20. parallel SE 2A3
  21. Want to build a tube/SS hybrid preamp for HT
  22. Do anyone has schematic for Counterpoint SA3000 ?
  23. Thermistor B+ or primary
  24. Measuring AC at Radio Frequencies
  25. The MingDa MC67-HA meets Frankenstein
  26. What's the biggest full wave damper diode?
  27. Maximising Tube Life
  28. Darling power supply calculations
  29. This is nice - Pix Ongen tube RIAA amp
  30. Tubelab SE 45... Super amp!?
  31. DAC - tube gain stage w/ AC heaters
  32. Microphonics?
  33. Insides of Tango Transformers
  34. Thoughts on horizontal sweep tubes?
  35. 2A3 Design Issues (Long)
  36. Design using EL42 output pentodes
  37. Blumlein's Garter Bias question
  38. Original ECL86 "Baby Huey" thread
  39. Too low heater voltage?
  40. Tube and digital?
  41. 807 monoblocks
  42. What to swap a 6AV6 for?
  43. Pot Noise Help
  44. cathode bias circuit question
  45. ECC40 driver stage for 2A3
  46. heater current and 6922 - 6n6p swap
  47. Tube Crystal Clock Oscillator
  48. Decware Zen Plate Model ZSP1
  49. Battery Power Preamp E188CC review please !
  50. 6sl7
  51. Tube sale at AES
  52. 5v3a
  53. 813 trioded Datasheet and curves
  54. Importance of resistor working voltage spec?
  55. TCJ My-Stock DB
  56. 845 Amp
  57. Ripple filtering help... strange slow rise and fall of voltage
  58. Plate and Filament Transformers
  59. Tentlabs Neg Bias Vs Machmat AFB
  60. Looking for 12AT7/ECC81 phonostage schematic
  61. 6AV5 PP amp Design Review
  62. 6sn7 Preamp power supply
  63. Please: tube kit for <$300?
  64. making a load line
  65. Telefunken Consoles: not just for tube and iron scavenging!
  66. Genalex Gold Lion KT77
  67. driving HD600
  68. Counterpoint SA-3000
  69. Phono stage for 2 7F7s (stereo) plus buffer?
  70. Help and your input on YAQIN MC10L EL34
  71. EL Cheapo Quad amplifier???
  72. Noob questions about a K-12/K-502 kit
  73. 3 quick transformer questions
  74. Push Pull Output tranies for SE amp?
  75. Tube Rectifier Capacitance?
  76. rca 189 b console amps need more info
  77. upgrade transformer?
  78. Parasitic oscillation? (picture)
  79. newbie question : driver/output relationship, input sensitivity
  80. Unknown tube logo
  81. Impedance, the 10x rule, losses & bandwidth
  82. el84/6bq5 PSE
  83. A very odd phase inverter- comments?
  84. Please check my work :)
  85. NOS purchase, should I be concerned?
  86. Strange splitter in the Audio Research D4
  87. 6ak5/5654 plate resistance
  88. Further Troubleshooting Simple SE
  89. What is the purpose of the g2 bypass cap?
  90. questionable 2a3 schematic
  91. overdrive circuit for hammond organs(need help)
  92. A singular experiment with a unheated tube.
  93. Limited bass response in one channel
  94. Show me your fave phonostage circuits.
  95. tube heater voltage, how much is too much?
  96. Para feed choke
  97. Dynaco ST35 power?
  98. Tips/comments for upcoming 300B build
  99. page Eli Duttman's Simple p-p with 5965 MQ EXO-173 and 6AQ5
  100. DHT cathode follower idea
  101. GK71 Output Transformer
  102. Schematics for A.I. Mod 2D
  103. Determing Battery Voltage for cathode bias
  104. OT for audio but still tube
  105. Getting transfer characteristics
  106. Pentodes and Choke Loading
  107. Stepped airgap choke ?
  108. Noob question
  109. SE 300B Integrated Amp: Help choose circuit design
  110. SunAudio 2A3 to 300B
  111. Filament Snubber Cap Explodes! What happened?
  112. Alot of 12AX7's about
  113. DIY tube microphone preamp
  114. Tube tester and PSUD II questions
  115. Wurlitzer/Fisher Amp Musings
  116. please check my work
  117. How to get cathode bias info from grid bias info?
  118. SE 300B Integrated Amp: Transformers
  119. Positive feedback, improperly drawn screen, or WTF?
  120. GE Console RC 7100 A - need some help!
  121. Output tube for 600V B+, 5800 ohm primary PP, tertiary 25% UL taps?
  122. Still tring to find a couple 100uf motor runs
  123. small push-pull amp to preamp
  124. Electraprint EL84 PP with PSA-2N
  125. OpAmp Swap?
  126. Bogen MX-60A- output transformer bandwidth?
  127. 6AS7 Parallel Feed Amp
  128. PSpice model of output transformer
  129. simple guitar push pull amp
  130. Siemens capacitor
  131. Super 6BG6 vs. 6550
  132. 5687 line stage
  133. Audio Standards
  134. 4 x used 5867A (TB3/750) triodes
  135. 12au7 who has the best ultra low noise ???
  136. Questions about tweaking the Miniblok SET...
  137. The core -sonic reasons
  138. Removing pot from valve pre amp
  139. Power transformer question
  140. Tube construction materials
  141. LTP second grid
  142. How to figure out the bias point of fisher X-100A
  143. Schematic help! (Bell)
  144. Audio Note Soro SE SCHEMATICS
  145. 807 Tube Triode Connected
  146. Would you pls help.
  147. came across this nice 200W tube amp schematic
  148. Anyone seen this amp topology before?
  149. Max. grid resistance
  150. Yaqin mc10l &quot;popping&quot;
  151. Audio Electronics Supply
  152. Alamo Fury 2566
  153. My friends in the USA - tube stores in LA
  154. Can this marraige work?
  155. RJM with 12AY7
  156. Bias winding to power sand
  157. FM Tube radio design
  158. What do you use? Not technical but relative.
  159. looking for a pre-amp schematic
  160. I have waay too many 6DJ8's
  161. Tango NP126
  162. Two 6J5 versus one 6SN7
  163. Bunch of questions regarding plate CCS and some else.
  164. Tube Store in Washington DC (6C33C Triode Buy Where??)
  165. Scott 399 Receiver Schematics?
  166. Need help with 6l6GC choices
  167. Need Hammond/Everett drawings.
  168. 6V6 PP-based Baby Huey/Mullard inspired design needed...
  169. Ecf80
  170. Please Explain difference Mono vs Push Pull vs Single End etc
  171. VU Meters
  172. diy preamps, bottlehead, decware....
  173. Power supply choke help needed
  174. LED cathode biasing in push-pull input stage
  175. applying fixed bias to cathode followers
  176. Battieries for B+
  177. Put amp in chassis, then, right channel doesn't work!
  178. hammond transformers?
  179. Two Rectifiers, One transformer
  180. Cool problem with Marshall TSL!!!
  181. Tubes currently in production
  182. Rachel's Corner - Shuguang
  183. Small 50C5 Amp improvements
  184. Low voltage pentode?
  185. TX distortion
  186. DIY U-L curves
  187. Transformer spacing
  188. Covers for budget output transformers
  189. Correct for bipolar voltage doubler?
  190. Source for 100uf motor run cap.
  191. magnavox 185aa with 4-6v6
  192. Yaqin 300B re-biasing
  193. Line Amp Diy 6j1
  194. Diy Line Amp£_£_6sn7
  195. Diy Line Amp Audio Note M7
  196. Diy Line Amp Cat Sl-1
  197. Diy Line Amp Malanz 7
  198. Diy Line Amp Htm
  199. Diy Line Amp Jp-80
  200. Diy Line Amp 5670
  201. Quality difference between output transformers
  202. A group-build project for a tube power amp in India
  203. pilot light ideas please
  204. Small signal pentode - zener screen regulation - why not ??
  205. Another KT-88
  206. Rod Coleman filament supply circuit boards
  207. Losing the treble and transient response in this PX25 SE amp
  208. Calculating Zout for Pentode amp with NFB?
  209. Bypassing a volume pot
  210. Lab supply for cathode bias experiment question..
  211. Rheostat for adjustable "fixed" bias?
  212. Output transformer Question
  213. Real Cost of Decware Amplifiers
  214. Digitally driven tube pre-amp
  215. Real cost of Dynaco ST 70 Kits
  216. Fake electrolytics?
  217. Oddball Console Amplifier
  218. Transistor phase splitter (Yaqin MC-84L)
  219. Shuguang to stop 845 and 211
  220. first project.
  221. Help on capacitor info...
  222. Se Kt-66
  223. Is there a power supply guru?
  224. Direct Coupling question
  225. What's the best way to hook up an Isolation transformer
  226. Marzio &Jelasi's Direct Coupled SE Amp
  227. 6SN7 or 6SN7GT??
  228. HY40 Power Triode
  229. parallel capacitors in PS question
  230. Looking for feedback on Bottlehead amps
  231. First Watt F3 / Tube Audio Design TAD-125 Hibachi JFET amps
  232. S-5 Push Pull Power Supply Upgrade!
  233. Capacitor voltage rating conversion
  234. Output Transformer Air Gap
  235. PCF80 -Designing a Pentode Constant Current Sink - help needed.
  236. Purity and simplicity of amp design
  237. watt meters
  238. DIY Dynaco ST70
  239. Help need some info on this Raytheon
  240. Isolating parallel feed amplifiers
  241. Please help for B+ problem!
  242. Second Tubelab Simple SE board done
  243. "Sallen-Key" Public domain?
  244. Transformer questions / Good headphones?
  245. Which Spud Amp?
  246. Very simple SE Triode Help
  247. Tube friendly speakers
  248. Counterpoint SA5000 schematic
  249. Yaqin MC-10L
  250. Screen Driven Dissimilar Pentode SE Anti-Triode Spud

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