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  1. 5687 perveance
  2. Where Can I Pick Up Neutral
  3. Hyperlinear line preamp
  4. What tube to use.
  5. Using mains transformer as output transformer
  6. AutoCAD of tube Packages?
  7. Has Anyone Tried This Before??
  8. More Tube Learning (for me) Cathode followers
  9. weird hum problem
  10. Simple technique for guitar amp channel switching?
  11. Weird oscillation
  12. Tube stash strategy and testing (long)
  13. Choke loaded LTP
  14. LM Ericsson 2C51 help!
  15. Antek TXs??Any use em???
  16. Speaker impedance questions (SE KT88)
  17. Spud-Assist: Totem-Pole Current-Mirror PP Hybrid
  18. my 6922 / E88CC preamp
  19. For the moderator
  20. 3 amps for HE speakers
  21. Pentode sounds great
  22. Shindo claret
  23. james 6123hs
  24. 6550 Amplifier
  25. ARC Ls 15 Schematic
  26. Super spud-amp?
  27. Basic Oscilloscope Usage Questions
  28. Grounded Cathode phase?
  29. Simple SE, how to wire CFB with outputs for different speaker impedances?
  30. PCB Board designer?
  31. Speaker for your low power tube amp?
  32. Tube collection Database.
  33. E288cc value?
  34. Hi End Tube Project
  35. parallel SE 2A3
  36. Want to build a tube/SS hybrid preamp for HT
  37. Do anyone has schematic for Counterpoint SA3000 ?
  38. Thermistor B+ or primary
  39. Measuring AC at Radio Frequencies
  40. The MingDa MC67-HA meets Frankenstein
  41. What's the biggest full wave damper diode?
  42. Maximising Tube Life
  43. Darling power supply calculations
  44. This is nice - Pix Ongen tube RIAA amp
  45. Tubelab SE 45... Super amp!?
  46. DAC - tube gain stage w/ AC heaters
  47. Microphonics?
  48. Insides of Tango Transformers
  49. Thoughts on horizontal sweep tubes?
  50. 2A3 Design Issues (Long)
  51. Design using EL42 output pentodes
  52. Blumlein's Garter Bias question
  53. Original ECL86 "Baby Huey" thread
  54. Too low heater voltage?
  55. Tube and digital?
  56. 807 monoblocks
  57. What to swap a 6AV6 for?
  58. Pot Noise Help
  59. cathode bias circuit question
  60. ECC40 driver stage for 2A3
  61. heater current and 6922 - 6n6p swap
  62. Tube Crystal Clock Oscillator
  63. Decware Zen Plate Model ZSP1
  64. Battery Power Preamp E188CC review please !
  65. 6sl7
  66. Tube sale at AES
  67. 5v3a
  68. 813 trioded Datasheet and curves
  69. Importance of resistor working voltage spec?
  70. TCJ My-Stock DB
  71. 845 Amp
  72. Ripple filtering help... strange slow rise and fall of voltage
  73. Plate and Filament Transformers
  74. Tentlabs Neg Bias Vs Machmat AFB
  75. Looking for 12AT7/ECC81 phonostage schematic
  76. 6AV5 PP amp Design Review
  77. 6sn7 Preamp power supply
  78. Please: tube kit for <$300?
  79. making a load line
  80. Telefunken Consoles: not just for tube and iron scavenging!
  81. Genalex Gold Lion KT77
  82. driving HD600
  83. Counterpoint SA-3000
  84. Phono stage for 2 7F7s (stereo) plus buffer?
  85. Help and your input on YAQIN MC10L EL34
  86. EL Cheapo Quad amplifier???
  87. Noob questions about a K-12/K-502 kit
  88. 3 quick transformer questions
  89. Push Pull Output tranies for SE amp?
  90. Tube Rectifier Capacitance?
  91. rca 189 b console amps need more info
  92. upgrade transformer?
  93. Parasitic oscillation? (picture)
  94. newbie question : driver/output relationship, input sensitivity
  95. Unknown tube logo
  96. Impedance, the 10x rule, losses & bandwidth
  97. el84/6bq5 PSE
  98. A very odd phase inverter- comments?
  99. Please check my work :)
  100. NOS purchase, should I be concerned?
  101. Strange splitter in the Audio Research D4
  102. 6ak5/5654 plate resistance
  103. Further Troubleshooting Simple SE
  104. What is the purpose of the g2 bypass cap?
  105. questionable 2a3 schematic
  106. overdrive circuit for hammond organs(need help)
  107. A singular experiment with a unheated tube.
  108. Limited bass response in one channel
  109. Show me your fave phonostage circuits.
  110. tube heater voltage, how much is too much?
  111. Para feed choke
  112. Dynaco ST35 power?
  113. Tips/comments for upcoming 300B build
  114. page Eli Duttman's Simple p-p with 5965 MQ EXO-173 and 6AQ5
  115. DHT cathode follower idea
  116. GK71 Output Transformer
  117. Schematics for A.I. Mod 2D
  118. Determing Battery Voltage for cathode bias
  119. OT for audio but still tube
  120. Getting transfer characteristics
  121. Pentodes and Choke Loading
  122. Stepped airgap choke ?
  123. Noob question
  124. SE 300B Integrated Amp: Help choose circuit design
  125. SunAudio 2A3 to 300B
  126. Filament Snubber Cap Explodes! What happened?
  127. Alot of 12AX7's about
  128. DIY tube microphone preamp
  129. Tube tester and PSUD II questions
  130. Wurlitzer/Fisher Amp Musings
  131. please check my work
  132. How to get cathode bias info from grid bias info?
  133. SE 300B Integrated Amp: Transformers
  134. Positive feedback, improperly drawn screen, or WTF?
  135. GE Console RC 7100 A - need some help!
  136. Output tube for 600V B+, 5800 ohm primary PP, tertiary 25% UL taps?
  137. Still tring to find a couple 100uf motor runs
  138. small push-pull amp to preamp
  139. Electraprint EL84 PP with PSA-2N
  140. OpAmp Swap?
  141. Bogen MX-60A- output transformer bandwidth?
  142. 6AS7 Parallel Feed Amp
  143. PSpice model of output transformer
  144. simple guitar push pull amp
  145. Siemens capacitor
  146. Super 6BG6 vs. 6550
  147. 5687 line stage
  148. Audio Standards
  149. 4 x used 5867A (TB3/750) triodes
  150. 12au7 who has the best ultra low noise ???
  151. Questions about tweaking the Miniblok SET...
  152. The core -sonic reasons
  153. Removing pot from valve pre amp
  154. Power transformer question
  155. Tube construction materials
  156. LTP second grid
  157. How to figure out the bias point of fisher X-100A
  158. Schematic help! (Bell)
  159. Audio Note Soro SE SCHEMATICS
  160. 807 Tube Triode Connected
  161. Would you pls help.
  162. came across this nice 200W tube amp schematic
  163. Anyone seen this amp topology before?
  164. Max. grid resistance
  165. Yaqin mc10l &quot;popping&quot;
  166. Audio Electronics Supply
  167. Alamo Fury 2566
  168. My friends in the USA - tube stores in LA
  169. Can this marraige work?
  170. RJM with 12AY7
  171. Bias winding to power sand
  172. FM Tube radio design
  173. What do you use? Not technical but relative.
  174. looking for a pre-amp schematic
  175. I have waay too many 6DJ8's
  176. Tango NP126
  177. Two 6J5 versus one 6SN7
  178. Bunch of questions regarding plate CCS and some else.
  179. Tube Store in Washington DC (6C33C Triode Buy Where??)
  180. Scott 399 Receiver Schematics?
  181. Need help with 6l6GC choices
  182. Need Hammond/Everett drawings.
  183. 6V6 PP-based Baby Huey/Mullard inspired design needed...
  184. Ecf80
  185. Please Explain difference Mono vs Push Pull vs Single End etc
  186. VU Meters
  187. diy preamps, bottlehead, decware....
  188. Power supply choke help needed
  189. LED cathode biasing in push-pull input stage
  190. applying fixed bias to cathode followers
  191. Battieries for B+
  192. Put amp in chassis, then, right channel doesn't work!
  193. hammond transformers?
  194. Two Rectifiers, One transformer
  195. Cool problem with Marshall TSL!!!
  196. Tubes currently in production
  197. Rachel's Corner - Shuguang
  198. Small 50C5 Amp improvements
  199. Low voltage pentode?
  200. TX distortion
  201. DIY U-L curves
  202. Transformer spacing
  203. Covers for budget output transformers
  204. Correct for bipolar voltage doubler?
  205. Source for 100uf motor run cap.
  206. magnavox 185aa with 4-6v6
  207. Yaqin 300B re-biasing
  208. Line Amp Diy 6j1
  209. Diy Line Amp£_£_6sn7
  210. Diy Line Amp Audio Note M7
  211. Diy Line Amp Cat Sl-1
  212. Diy Line Amp Malanz 7
  213. Diy Line Amp Htm
  214. Diy Line Amp Jp-80
  215. Diy Line Amp 5670
  216. Quality difference between output transformers
  217. A group-build project for a tube power amp in India
  218. pilot light ideas please
  219. Small signal pentode - zener screen regulation - why not ??
  220. Another KT-88
  221. Rod Coleman filament supply circuit boards
  222. Losing the treble and transient response in this PX25 SE amp
  223. Calculating Zout for Pentode amp with NFB?
  224. Bypassing a volume pot
  225. Lab supply for cathode bias experiment question..
  226. Rheostat for adjustable "fixed" bias?
  227. Output transformer Question
  228. Real Cost of Decware Amplifiers
  229. Digitally driven tube pre-amp
  230. Real cost of Dynaco ST 70 Kits
  231. Fake electrolytics?
  232. Oddball Console Amplifier
  233. Transistor phase splitter (Yaqin MC-84L)
  234. Shuguang to stop 845 and 211
  235. first project.
  236. Help on capacitor info...
  237. Se Kt-66
  238. Is there a power supply guru?
  239. Direct Coupling question
  240. What's the best way to hook up an Isolation transformer
  241. Marzio &Jelasi's Direct Coupled SE Amp
  242. 6SN7 or 6SN7GT??
  243. HY40 Power Triode
  244. parallel capacitors in PS question
  245. Looking for feedback on Bottlehead amps
  246. First Watt F3 / Tube Audio Design TAD-125 Hibachi JFET amps
  247. S-5 Push Pull Power Supply Upgrade!
  248. Capacitor voltage rating conversion
  249. Output Transformer Air Gap
  250. PCF80 -Designing a Pentode Constant Current Sink - help needed.

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