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