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  1. james 6123hs
  2. 6550 Amplifier
  3. ARC Ls 15 Schematic
  4. Super spud-amp?
  5. Basic Oscilloscope Usage Questions
  6. Grounded Cathode phase?
  7. Simple SE, how to wire CFB with outputs for different speaker impedances?
  8. PCB Board designer?
  9. Speaker for your low power tube amp?
  10. Tube collection Database.
  11. E288cc value?
  12. Hi End Tube Project
  13. parallel SE 2A3
  14. Want to build a tube/SS hybrid preamp for HT
  15. Do anyone has schematic for Counterpoint SA3000 ?
  16. Thermistor B+ or primary
  17. Measuring AC at Radio Frequencies
  18. The MingDa MC67-HA meets Frankenstein
  19. What's the biggest full wave damper diode?
  20. Maximising Tube Life
  21. Darling power supply calculations
  22. This is nice - Pix Ongen tube RIAA amp
  23. Tubelab SE 45... Super amp!?
  24. DAC - tube gain stage w/ AC heaters
  25. Microphonics?
  26. Insides of Tango Transformers
  27. Thoughts on horizontal sweep tubes?
  28. 2A3 Design Issues (Long)
  29. Design using EL42 output pentodes
  30. Blumlein's Garter Bias question
  31. Original ECL86 "Baby Huey" thread
  32. Too low heater voltage?
  33. Tube and digital?
  34. 807 monoblocks
  35. What to swap a 6AV6 for?
  36. Pot Noise Help
  37. cathode bias circuit question
  38. ECC40 driver stage for 2A3
  39. heater current and 6922 - 6n6p swap
  40. Tube Crystal Clock Oscillator
  41. Decware Zen Plate Model ZSP1
  42. Battery Power Preamp E188CC review please !
  43. 6sl7
  44. Tube sale at AES
  45. 5v3a
  46. 813 trioded Datasheet and curves
  47. Importance of resistor working voltage spec?
  48. TCJ My-Stock DB
  49. 845 Amp
  50. Ripple filtering help... strange slow rise and fall of voltage
  51. Plate and Filament Transformers
  52. Tentlabs Neg Bias Vs Machmat AFB
  53. Looking for 12AT7/ECC81 phonostage schematic
  54. 6AV5 PP amp Design Review
  55. 6sn7 Preamp power supply
  56. Please: tube kit for <$300?
  57. making a load line
  58. Telefunken Consoles: not just for tube and iron scavenging!
  59. Genalex Gold Lion KT77
  60. driving HD600
  61. Counterpoint SA-3000
  62. Phono stage for 2 7F7s (stereo) plus buffer?
  63. Help and your input on YAQIN MC10L EL34
  64. EL Cheapo Quad amplifier???
  65. Noob questions about a K-12/K-502 kit
  66. 3 quick transformer questions
  67. Push Pull Output tranies for SE amp?
  68. Tube Rectifier Capacitance?
  69. rca 189 b console amps need more info
  70. upgrade transformer?
  71. Parasitic oscillation? (picture)
  72. newbie question : driver/output relationship, input sensitivity
  73. Unknown tube logo
  74. Impedance, the 10x rule, losses & bandwidth
  75. el84/6bq5 PSE
  76. A very odd phase inverter- comments?
  77. Please check my work :)
  78. NOS purchase, should I be concerned?
  79. Strange splitter in the Audio Research D4
  80. 6ak5/5654 plate resistance
  81. Further Troubleshooting Simple SE
  82. What is the purpose of the g2 bypass cap?
  83. questionable 2a3 schematic
  84. overdrive circuit for hammond organs(need help)
  85. A singular experiment with a unheated tube.
  86. Limited bass response in one channel
  87. Show me your fave phonostage circuits.
  88. tube heater voltage, how much is too much?
  89. Para feed choke
  90. Dynaco ST35 power?
  91. Tips/comments for upcoming 300B build
  92. page Eli Duttman's Simple p-p with 5965 MQ EXO-173 and 6AQ5
  93. DHT cathode follower idea
  94. GK71 Output Transformer
  95. Schematics for A.I. Mod 2D
  96. Determing Battery Voltage for cathode bias
  97. OT for audio but still tube
  98. Getting transfer characteristics
  99. Pentodes and Choke Loading
  100. Stepped airgap choke ?
  101. Noob question
  102. SE 300B Integrated Amp: Help choose circuit design
  103. SunAudio 2A3 to 300B
  104. Filament Snubber Cap Explodes! What happened?
  105. Alot of 12AX7's about
  106. DIY tube microphone preamp
  107. Tube tester and PSUD II questions
  108. Wurlitzer/Fisher Amp Musings
  109. please check my work
  110. How to get cathode bias info from grid bias info?
  111. SE 300B Integrated Amp: Transformers
  112. Positive feedback, improperly drawn screen, or WTF?
  113. GE Console RC 7100 A - need some help!
  114. Output tube for 600V B+, 5800 ohm primary PP, tertiary 25% UL taps?
  115. Still tring to find a couple 100uf motor runs
  116. small push-pull amp to preamp
  117. OpAmp Swap?
  118. Electraprint EL84 PP with PSA-2N
  119. Bogen MX-60A- output transformer bandwidth?
  120. 6AS7 Parallel Feed Amp
  121. PSpice model of output transformer
  122. Super 6BG6 vs. 6550
  123. 5687 line stage
  124. Audio Standards
  125. 4 x used 5867A (TB3/750) triodes
  126. 12au7 who has the best ultra low noise ???
  127. Questions about tweaking the Miniblok SET...
  128. The core -sonic reasons
  129. Removing pot from valve pre amp
  130. Power transformer question
  131. Tube construction materials
  132. LTP second grid
  133. How to figure out the bias point of fisher X-100A
  134. Schematic help! (Bell)
  135. Audio Note Soro SE SCHEMATICS
  136. 807 Tube Triode Connected
  137. Would you pls help.
  138. came across this nice 200W tube amp schematic
  139. Anyone seen this amp topology before?
  140. Max. grid resistance
  141. Yaqin mc10l &quot;popping&quot;
  142. Audio Electronics Supply
  143. Alamo Fury 2566
  144. My friends in the USA - tube stores in LA
  145. Can this marraige work?
  146. RJM with 12AY7
  147. Bias winding to power sand
  148. FM Tube radio design
  149. What do you use? Not technical but relative.
  150. looking for a pre-amp schematic
  151. I have waay too many 6DJ8's
  152. Tango NP126
  153. Two 6J5 versus one 6SN7
  154. Bunch of questions regarding plate CCS and some else.
  155. Tube Store in Washington DC (6C33C Triode Buy Where??)
  156. Scott 399 Receiver Schematics?
  157. Need help with 6l6GC choices
  158. Need Hammond/Everett drawings.
  159. 6V6 PP-based Baby Huey/Mullard inspired design needed...
  160. Ecf80
  161. Please Explain difference Mono vs Push Pull vs Single End etc
  162. VU Meters
  163. diy preamps, bottlehead, decware....
  164. Power supply choke help needed
  165. LED cathode biasing in push-pull input stage
  166. applying fixed bias to cathode followers
  167. Battieries for B+
  168. Put amp in chassis, then, right channel doesn't work!
  169. hammond transformers?
  170. Two Rectifiers, One transformer
  171. Tubes currently in production
  172. Rachel's Corner - Shuguang
  173. Small 50C5 Amp improvements
  174. Low voltage pentode?
  175. TX distortion
  176. DIY U-L curves
  177. Transformer spacing
  178. Covers for budget output transformers
  179. Correct for bipolar voltage doubler?
  180. Source for 100uf motor run cap.
  181. magnavox 185aa with 4-6v6
  182. Yaqin 300B re-biasing
  183. Line Amp Diy 6j1
  184. Diy Line Amp£_£_6sn7
  185. Diy Line Amp Audio Note M7
  186. Diy Line Amp Cat Sl-1
  187. Diy Line Amp Malanz 7
  188. Diy Line Amp Htm
  189. Diy Line Amp Jp-80
  190. Diy Line Amp 5670
  191. Quality difference between output transformers
  192. A group-build project for a tube power amp in India
  193. pilot light ideas please
  194. Small signal pentode - zener screen regulation - why not ??
  195. Another KT-88
  196. Rod Coleman filament supply circuit boards
  197. Losing the treble and transient response in this PX25 SE amp
  198. Calculating Zout for Pentode amp with NFB?
  199. Bypassing a volume pot
  200. Lab supply for cathode bias experiment question..
  201. Rheostat for adjustable "fixed" bias?
  202. Output transformer Question
  203. Real Cost of Decware Amplifiers
  204. Digitally driven tube pre-amp
  205. Real cost of Dynaco ST 70 Kits
  206. Fake electrolytics?
  207. Oddball Console Amplifier
  208. Transistor phase splitter (Yaqin MC-84L)
  209. Shuguang to stop 845 and 211
  210. first project.
  211. Se Kt-66
  212. Is there a power supply guru?
  213. Direct Coupling question
  214. What's the best way to hook up an Isolation transformer
  215. Marzio &Jelasi's Direct Coupled SE Amp
  216. 6SN7 or 6SN7GT??
  217. HY40 Power Triode
  218. parallel capacitors in PS question
  219. Looking for feedback on Bottlehead amps
  220. First Watt F3 / Tube Audio Design TAD-125 Hibachi JFET amps
  221. S-5 Push Pull Power Supply Upgrade!
  222. Output Transformer Air Gap
  223. PCF80 -Designing a Pentode Constant Current Sink - help needed.
  224. Purity and simplicity of amp design
  225. watt meters
  226. DIY Dynaco ST70
  227. Help need some info on this Raytheon
  228. Isolating parallel feed amplifiers
  229. Please help for B+ problem!
  230. Second Tubelab Simple SE board done
  231. "Sallen-Key" Public domain?
  232. Transformer questions / Good headphones?
  233. Which Spud Amp?
  234. Very simple SE Triode Help
  235. Tube friendly speakers
  236. Counterpoint SA5000 schematic
  237. Yaqin MC-10L
  238. Screen Driven Dissimilar Pentode SE Anti-Triode Spud
  239. Power tube bias increasing with signal.
  240. Preamp suggestion required pls
  241. How to change deemphasis from 75uS to 50uS for Fisher FM100
  242. Which 300B ?
  243. Custom OT for 6C33C tube - any advice
  244. s-5 tube amp hum troubles
  245. Cathode feedback on Mikael's SE KT88?
  246. RCA tube rectifier
  247. 300B Schematic
  248. Tubelab wiring
  249. My first amp!
  250. Building a Aikido preamplifier

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