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  1. Tube Crystal Clock Oscillator
  2. Decware Zen Plate Model ZSP1
  3. Battery Power Preamp E188CC review please !
  4. 6sl7
  5. Tube sale at AES
  6. 5v3a
  7. 813 trioded Datasheet and curves
  8. Importance of resistor working voltage spec?
  9. TCJ My-Stock DB
  10. 845 Amp
  11. Ripple filtering help... strange slow rise and fall of voltage
  12. Plate and Filament Transformers
  13. Tentlabs Neg Bias Vs Machmat AFB
  14. Looking for 12AT7/ECC81 phonostage schematic
  15. 6AV5 PP amp Design Review
  16. 6sn7 Preamp power supply
  17. Please: tube kit for <$300?
  18. making a load line
  19. Telefunken Consoles: not just for tube and iron scavenging!
  20. Genalex Gold Lion KT77
  21. driving HD600
  22. Counterpoint SA-3000
  23. Phono stage for 2 7F7s (stereo) plus buffer?
  24. Help and your input on YAQIN MC10L EL34
  25. EL Cheapo Quad amplifier???
  26. Noob questions about a K-12/K-502 kit
  27. 3 quick transformer questions
  28. Push Pull Output tranies for SE amp?
  29. Tube Rectifier Capacitance?
  30. rca 189 b console amps need more info
  31. upgrade transformer?
  32. Parasitic oscillation? (picture)
  33. newbie question : driver/output relationship, input sensitivity
  34. Unknown tube logo
  35. Impedance, the 10x rule, losses & bandwidth
  36. el84/6bq5 PSE
  37. A very odd phase inverter- comments?
  38. Please check my work :)
  39. NOS purchase, should I be concerned?
  40. Strange splitter in the Audio Research D4
  41. 6ak5/5654 plate resistance
  42. Further Troubleshooting Simple SE
  43. What is the purpose of the g2 bypass cap?
  44. questionable 2a3 schematic
  45. overdrive circuit for hammond organs(need help)
  46. A singular experiment with a unheated tube.
  47. Limited bass response in one channel
  48. Show me your fave phonostage circuits.
  49. tube heater voltage, how much is too much?
  50. Para feed choke
  51. Dynaco ST35 power?
  52. Tips/comments for upcoming 300B build
  53. page Eli Duttman's Simple p-p with 5965 MQ EXO-173 and 6AQ5
  54. DHT cathode follower idea
  55. GK71 Output Transformer
  56. Schematics for A.I. Mod 2D
  57. Determing Battery Voltage for cathode bias
  58. OT for audio but still tube
  59. Getting transfer characteristics
  60. Pentodes and Choke Loading
  61. Stepped airgap choke ?
  62. Noob question
  63. SE 300B Integrated Amp: Help choose circuit design
  64. SunAudio 2A3 to 300B
  65. Filament Snubber Cap Explodes! What happened?
  66. Alot of 12AX7's about
  67. DIY tube microphone preamp
  68. Tube tester and PSUD II questions
  69. Wurlitzer/Fisher Amp Musings
  70. please check my work
  71. How to get cathode bias info from grid bias info?
  72. SE 300B Integrated Amp: Transformers
  73. Positive feedback, improperly drawn screen, or WTF?
  74. GE Console RC 7100 A - need some help!
  75. Output tube for 600V B+, 5800 ohm primary PP, tertiary 25% UL taps?
  76. Still tring to find a couple 100uf motor runs
  77. small push-pull amp to preamp
  78. Electraprint EL84 PP with PSA-2N
  79. OpAmp Swap?
  80. Bogen MX-60A- output transformer bandwidth?
  81. 6AS7 Parallel Feed Amp
  82. PSpice model of output transformer
  83. simple guitar push pull amp
  84. Siemens capacitor
  85. Super 6BG6 vs. 6550
  86. 5687 line stage
  87. Audio Standards
  88. 4 x used 5867A (TB3/750) triodes
  89. 12au7 who has the best ultra low noise ???
  90. Questions about tweaking the Miniblok SET...
  91. The core -sonic reasons
  92. Removing pot from valve pre amp
  93. Power transformer question
  94. Tube construction materials
  95. LTP second grid
  96. How to figure out the bias point of fisher X-100A
  97. Schematic help! (Bell)
  98. Audio Note Soro SE SCHEMATICS
  99. 807 Tube Triode Connected
  100. Would you pls help.
  101. came across this nice 200W tube amp schematic
  102. Anyone seen this amp topology before?
  103. Max. grid resistance
  104. Yaqin mc10l &quot;popping&quot;
  105. Audio Electronics Supply
  106. Alamo Fury 2566
  107. My friends in the USA - tube stores in LA
  108. Can this marraige work?
  109. RJM with 12AY7
  110. Bias winding to power sand
  111. FM Tube radio design
  112. What do you use? Not technical but relative.
  113. looking for a pre-amp schematic
  114. I have waay too many 6DJ8's
  115. Tango NP126
  116. Two 6J5 versus one 6SN7
  117. Bunch of questions regarding plate CCS and some else.
  118. Tube Store in Washington DC (6C33C Triode Buy Where??)
  119. Scott 399 Receiver Schematics?
  120. Need help with 6l6GC choices
  121. Need Hammond/Everett drawings.
  122. 6V6 PP-based Baby Huey/Mullard inspired design needed...
  123. Ecf80
  124. Please Explain difference Mono vs Push Pull vs Single End etc
  125. VU Meters
  126. diy preamps, bottlehead, decware....
  127. Power supply choke help needed
  128. LED cathode biasing in push-pull input stage
  129. applying fixed bias to cathode followers
  130. Battieries for B+
  131. Put amp in chassis, then, right channel doesn't work!
  132. hammond transformers?
  133. Two Rectifiers, One transformer
  134. Cool problem with Marshall TSL!!!
  135. Tubes currently in production
  136. Rachel's Corner - Shuguang
  137. Small 50C5 Amp improvements
  138. Low voltage pentode?
  139. TX distortion
  140. DIY U-L curves
  141. Transformer spacing
  142. Covers for budget output transformers
  143. Correct for bipolar voltage doubler?
  144. Source for 100uf motor run cap.
  145. magnavox 185aa with 4-6v6
  146. Yaqin 300B re-biasing
  147. Line Amp Diy 6j1
  148. Diy Line Amp£_£_6sn7
  149. Diy Line Amp Audio Note M7
  150. Diy Line Amp Cat Sl-1
  151. Diy Line Amp Malanz 7
  152. Diy Line Amp Htm
  153. Diy Line Amp 5670
  154. Diy Line Amp Jp-80
  155. Quality difference between output transformers
  156. A group-build project for a tube power amp in India
  157. pilot light ideas please
  158. Small signal pentode - zener screen regulation - why not ??
  159. Another KT-88
  160. Losing the treble and transient response in this PX25 SE amp
  161. Rod Coleman filament supply circuit boards
  162. Calculating Zout for Pentode amp with NFB?
  163. Bypassing a volume pot
  164. Lab supply for cathode bias experiment question..
  165. Rheostat for adjustable "fixed" bias?
  166. Output transformer Question
  167. Real Cost of Decware Amplifiers
  168. Digitally driven tube pre-amp
  169. Real cost of Dynaco ST 70 Kits
  170. Fake electrolytics?
  171. Oddball Console Amplifier
  172. Transistor phase splitter (Yaqin MC-84L)
  173. Shuguang to stop 845 and 211
  174. first project.
  175. Help on capacitor info...
  176. Se Kt-66
  177. Is there a power supply guru?
  178. Direct Coupling question
  179. What's the best way to hook up an Isolation transformer
  180. Marzio &Jelasi's Direct Coupled SE Amp
  181. 6SN7 or 6SN7GT??
  182. HY40 Power Triode
  183. parallel capacitors in PS question
  184. Looking for feedback on Bottlehead amps
  185. First Watt F3 / Tube Audio Design TAD-125 Hibachi JFET amps
  186. S-5 Push Pull Power Supply Upgrade!
  187. Capacitor voltage rating conversion
  188. Output Transformer Air Gap
  189. PCF80 -Designing a Pentode Constant Current Sink - help needed.
  190. Purity and simplicity of amp design
  191. watt meters
  192. DIY Dynaco ST70
  193. Help need some info on this Raytheon
  194. Isolating parallel feed amplifiers
  195. Please help for B+ problem!
  196. Second Tubelab Simple SE board done
  197. "Sallen-Key" Public domain?
  198. Transformer questions / Good headphones?
  199. Which Spud Amp?
  200. Very simple SE Triode Help
  201. Tube friendly speakers
  202. Counterpoint SA5000 schematic
  203. Yaqin MC-10L
  204. Screen Driven Dissimilar Pentode SE Anti-Triode Spud
  205. Power tube bias increasing with signal.
  206. Preamp suggestion required pls
  207. How to change deemphasis from 75uS to 50uS for Fisher FM100
  208. Which 300B ?
  209. Custom OT for 6C33C tube - any advice
  210. s-5 tube amp hum troubles
  211. Cathode feedback on Mikael's SE KT88?
  212. RCA tube rectifier
  213. 300B Schematic
  214. Tubelab wiring
  215. My first amp!
  216. Building a Aikido preamplifier
  217. Tube rolling causes failure...
  218. Briefly subjected heaters to about 12v by accident.
  219. She lives!
  220. Wilcox Gay 5U
  221. 6EM7 project: maybe use more sand?
  222. 12B4A SET - any critiques on this project?
  223. Heathkit Manual
  224. What is this??
  225. Amp and Speakers decision
  226. Hey guitar joe...
  227. Question about Low Impedence Filters on a Bogen PA Head Need Info.
  228. counterpoint 3.1
  229. good book for learning the basics of tubes and tube amps
  230. Heater circuit - to twist or not to twist
  231. Rock and Flame: Wavebourn Barracuda
  232. Low voltage rectifiers?
  233. Horz Sweep amp Pent or screen drive
  234. Lessons learned building a 5VDC Power Supply for a 300B heater
  235. Getting frustrated--- amps and speakers for the noob
  236. Smallish chassis feasible? Multiple pics
  237. Using a Maida Regulator with a CCS
  238. Which Aikido pre-amp PCB for a newbie?
  239. Newbie wants to build Tubelab SE Monos.
  240. FM transmitter / PA
  241. What value attenuator would you use in front of a 396A in a preamp?
  242. Hybrid OTL Circlotron idea
  243. Heathkit aa-121
  244. Help please checking my B+ design
  245. Selenium rectifiers
  246. isolation transformer - high voltage.
  247. Cathode Bypass in a PP Output Stage
  248. Mcintosh Tube Amplifier Protection Circuit
  249. Where to start? Or: cool these plates down
  250. epiphone pacemaker 50 t