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  1. E288cc value?
  2. Hi End Tube Project
  3. parallel SE 2A3
  4. Want to build a tube/SS hybrid preamp for HT
  5. Do anyone has schematic for Counterpoint SA3000 ?
  6. Thermistor B+ or primary
  7. Measuring AC at Radio Frequencies
  8. The MingDa MC67-HA meets Frankenstein
  9. What's the biggest full wave damper diode?
  10. Maximising Tube Life
  11. Darling power supply calculations
  12. This is nice - Pix Ongen tube RIAA amp
  13. Tubelab SE 45... Super amp!?
  14. DAC - tube gain stage w/ AC heaters
  15. Microphonics?
  16. Insides of Tango Transformers
  17. Thoughts on horizontal sweep tubes?
  18. 2A3 Design Issues (Long)
  19. Design using EL42 output pentodes
  20. Blumlein's Garter Bias question
  21. Original ECL86 "Baby Huey" thread
  22. Too low heater voltage?
  23. Tube and digital?
  24. 807 monoblocks
  25. What to swap a 6AV6 for?
  26. Pot Noise Help
  27. cathode bias circuit question
  28. ECC40 driver stage for 2A3
  29. heater current and 6922 - 6n6p swap
  30. Tube Crystal Clock Oscillator
  31. Decware Zen Plate Model ZSP1
  32. Battery Power Preamp E188CC review please !
  33. 6sl7
  34. Tube sale at AES
  35. 5v3a
  36. 813 trioded Datasheet and curves
  37. Importance of resistor working voltage spec?
  38. TCJ My-Stock DB
  39. 845 Amp
  40. Ripple filtering help... strange slow rise and fall of voltage
  41. Plate and Filament Transformers
  42. Tentlabs Neg Bias Vs Machmat AFB
  43. Looking for 12AT7/ECC81 phonostage schematic
  44. 6AV5 PP amp Design Review
  45. 6sn7 Preamp power supply
  46. Please: tube kit for <$300?
  47. making a load line
  48. Telefunken Consoles: not just for tube and iron scavenging!
  49. Genalex Gold Lion KT77
  50. driving HD600
  51. Counterpoint SA-3000
  52. Phono stage for 2 7F7s (stereo) plus buffer?
  53. Help and your input on YAQIN MC10L EL34
  54. EL Cheapo Quad amplifier???
  55. Noob questions about a K-12/K-502 kit
  56. 3 quick transformer questions
  57. Push Pull Output tranies for SE amp?
  58. Tube Rectifier Capacitance?
  59. rca 189 b console amps need more info
  60. upgrade transformer?
  61. Parasitic oscillation? (picture)
  62. newbie question : driver/output relationship, input sensitivity
  63. Unknown tube logo
  64. Impedance, the 10x rule, losses & bandwidth
  65. el84/6bq5 PSE
  66. A very odd phase inverter- comments?
  67. Please check my work :)
  68. NOS purchase, should I be concerned?
  69. Strange splitter in the Audio Research D4
  70. 6ak5/5654 plate resistance
  71. Further Troubleshooting Simple SE
  72. What is the purpose of the g2 bypass cap?
  73. questionable 2a3 schematic
  74. overdrive circuit for hammond organs(need help)
  75. A singular experiment with a unheated tube.
  76. Limited bass response in one channel
  77. Show me your fave phonostage circuits.
  78. tube heater voltage, how much is too much?
  79. Para feed choke
  80. Dynaco ST35 power?
  81. Tips/comments for upcoming 300B build
  82. page Eli Duttman's Simple p-p with 5965 MQ EXO-173 and 6AQ5
  83. DHT cathode follower idea
  84. GK71 Output Transformer
  85. Schematics for A.I. Mod 2D
  86. Determing Battery Voltage for cathode bias
  87. OT for audio but still tube
  88. Getting transfer characteristics
  89. Pentodes and Choke Loading
  90. Stepped airgap choke ?
  91. Noob question
  92. SE 300B Integrated Amp: Help choose circuit design
  93. SunAudio 2A3 to 300B
  94. Filament Snubber Cap Explodes! What happened?
  95. Alot of 12AX7's about
  96. DIY tube microphone preamp
  97. Tube tester and PSUD II questions
  98. Wurlitzer/Fisher Amp Musings
  99. please check my work
  100. How to get cathode bias info from grid bias info?
  101. SE 300B Integrated Amp: Transformers
  102. Positive feedback, improperly drawn screen, or WTF?
  103. GE Console RC 7100 A - need some help!
  104. Output tube for 600V B+, 5800 ohm primary PP, tertiary 25% UL taps?
  105. Still tring to find a couple 100uf motor runs
  106. small push-pull amp to preamp
  107. Electraprint EL84 PP with PSA-2N
  108. OpAmp Swap?
  109. Bogen MX-60A- output transformer bandwidth?
  110. 6AS7 Parallel Feed Amp
  111. PSpice model of output transformer
  112. simple guitar push pull amp
  113. Siemens capacitor
  114. Super 6BG6 vs. 6550
  115. 5687 line stage
  116. Audio Standards
  117. 4 x used 5867A (TB3/750) triodes
  118. 12au7 who has the best ultra low noise ???
  119. Questions about tweaking the Miniblok SET...
  120. The core -sonic reasons
  121. Removing pot from valve pre amp
  122. Power transformer question
  123. Tube construction materials
  124. LTP second grid
  125. How to figure out the bias point of fisher X-100A
  126. Schematic help! (Bell)
  127. Audio Note Soro SE SCHEMATICS
  128. 807 Tube Triode Connected
  129. Would you pls help.
  130. came across this nice 200W tube amp schematic
  131. Anyone seen this amp topology before?
  132. Max. grid resistance
  133. Yaqin mc10l &quot;popping&quot;
  134. Audio Electronics Supply
  135. Alamo Fury 2566
  136. My friends in the USA - tube stores in LA
  137. Can this marraige work?
  138. RJM with 12AY7
  139. Bias winding to power sand
  140. FM Tube radio design
  141. What do you use? Not technical but relative.
  142. looking for a pre-amp schematic
  143. I have waay too many 6DJ8's
  144. Tango NP126
  145. Two 6J5 versus one 6SN7
  146. Bunch of questions regarding plate CCS and some else.
  147. Tube Store in Washington DC (6C33C Triode Buy Where??)
  148. Scott 399 Receiver Schematics?
  149. Need help with 6l6GC choices
  150. Need Hammond/Everett drawings.
  151. 6V6 PP-based Baby Huey/Mullard inspired design needed...
  152. Ecf80
  153. Please Explain difference Mono vs Push Pull vs Single End etc
  154. VU Meters
  155. diy preamps, bottlehead, decware....
  156. Power supply choke help needed
  157. LED cathode biasing in push-pull input stage
  158. applying fixed bias to cathode followers
  159. Battieries for B+
  160. Put amp in chassis, then, right channel doesn't work!
  161. hammond transformers?
  162. Two Rectifiers, One transformer
  163. Cool problem with Marshall TSL!!!
  164. Tubes currently in production
  165. Rachel's Corner - Shuguang
  166. Small 50C5 Amp improvements
  167. Low voltage pentode?
  168. TX distortion
  169. DIY U-L curves
  170. Transformer spacing
  171. Covers for budget output transformers
  172. Correct for bipolar voltage doubler?
  173. Source for 100uf motor run cap.
  174. magnavox 185aa with 4-6v6
  175. Yaqin 300B re-biasing
  176. Line Amp Diy 6j1
  177. Diy Line Amp£_£_6sn7
  178. Diy Line Amp Audio Note M7
  179. Diy Line Amp Cat Sl-1
  180. Diy Line Amp Malanz 7
  181. Diy Line Amp Htm
  182. Diy Line Amp Jp-80
  183. Diy Line Amp 5670
  184. Quality difference between output transformers
  185. A group-build project for a tube power amp in India
  186. pilot light ideas please
  187. Small signal pentode - zener screen regulation - why not ??
  188. Another KT-88
  189. Rod Coleman filament supply circuit boards
  190. Losing the treble and transient response in this PX25 SE amp
  191. Calculating Zout for Pentode amp with NFB?
  192. Bypassing a volume pot
  193. Lab supply for cathode bias experiment question..
  194. Rheostat for adjustable "fixed" bias?
  195. Output transformer Question
  196. Real Cost of Decware Amplifiers
  197. Digitally driven tube pre-amp
  198. Real cost of Dynaco ST 70 Kits
  199. Fake electrolytics?
  200. Oddball Console Amplifier
  201. Transistor phase splitter (Yaqin MC-84L)
  202. Shuguang to stop 845 and 211
  203. first project.
  204. Help on capacitor info...
  205. Se Kt-66
  206. Is there a power supply guru?
  207. Direct Coupling question
  208. What's the best way to hook up an Isolation transformer
  209. Marzio &Jelasi's Direct Coupled SE Amp
  210. 6SN7 or 6SN7GT??
  211. HY40 Power Triode
  212. parallel capacitors in PS question
  213. Looking for feedback on Bottlehead amps
  214. First Watt F3 / Tube Audio Design TAD-125 Hibachi JFET amps
  215. S-5 Push Pull Power Supply Upgrade!
  216. Capacitor voltage rating conversion
  217. Output Transformer Air Gap
  218. PCF80 -Designing a Pentode Constant Current Sink - help needed.
  219. Purity and simplicity of amp design
  220. watt meters
  221. DIY Dynaco ST70
  222. Help need some info on this Raytheon
  223. Isolating parallel feed amplifiers
  224. Please help for B+ problem!
  225. Second Tubelab Simple SE board done
  226. "Sallen-Key" Public domain?
  227. Transformer questions / Good headphones?
  228. Which Spud Amp?
  229. Very simple SE Triode Help
  230. Tube friendly speakers
  231. Counterpoint SA5000 schematic
  232. Yaqin MC-10L
  233. Screen Driven Dissimilar Pentode SE Anti-Triode Spud
  234. Power tube bias increasing with signal.
  235. Preamp suggestion required pls
  236. How to change deemphasis from 75uS to 50uS for Fisher FM100
  237. Which 300B ?
  238. Custom OT for 6C33C tube - any advice
  239. s-5 tube amp hum troubles
  240. Cathode feedback on Mikael's SE KT88?
  241. RCA tube rectifier
  242. 300B Schematic
  243. Tubelab wiring
  244. My first amp!
  245. Building a Aikido preamplifier
  246. Tube rolling causes failure...
  247. Briefly subjected heaters to about 12v by accident.
  248. She lives!
  249. Wilcox Gay 5U
  250. 6EM7 project: maybe use more sand?

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