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  1. my 6922 / E88CC preamp
  2. For the moderator
  3. 3 amps for HE speakers
  4. Pentode sounds great
  5. Shindo claret
  6. james 6123hs
  7. 6550 Amplifier
  8. ARC Ls 15 Schematic
  9. Super spud-amp?
  10. Grounded Cathode phase?
  11. Speaker for your low power tube amp?
  12. Tube collection Database.
  13. E288cc value?
  14. Hi End Tube Project
  15. parallel SE 2A3
  16. Want to build a tube/SS hybrid preamp for HT
  17. Do anyone has schematic for Counterpoint SA3000 ?
  18. Thermistor B+ or primary
  19. The MingDa MC67-HA meets Frankenstein
  20. What's the biggest full wave damper diode?
  21. Maximising Tube Life
  22. Darling power supply calculations
  23. This is nice - Pix Ongen tube RIAA 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. Decware Zen Plate Model ZSP1
  41. Battery Power Preamp E188CC review please !
  42. 6sl7
  43. Tube sale at AES
  44. 5v3a
  45. 813 trioded Datasheet and curves
  46. TCJ My-Stock DB
  47. 845 Amp
  48. Ripple filtering help... strange slow rise and fall of voltage
  49. Plate and Filament Transformers
  50. Tentlabs Neg Bias Vs Machmat AFB
  51. Looking for 12AT7/ECC81 phonostage schematic
  52. 6AV5 PP amp Design Review
  53. 6sn7 Preamp power supply
  54. Please: tube kit for <$300?
  55. making a load line
  56. Telefunken Consoles: not just for tube and iron scavenging!
  57. Genalex Gold Lion KT77
  58. driving HD600
  59. Counterpoint SA-3000
  60. Phono stage for 2 7F7s (stereo) plus buffer?
  61. Help and your input on YAQIN MC10L EL34
  62. EL Cheapo Quad amplifier???
  63. Noob questions about a K-12/K-502 kit
  64. 3 quick transformer questions
  65. Push Pull Output tranies for SE amp?
  66. Tube Rectifier Capacitance?
  67. rca 189 b console amps need more info
  68. upgrade transformer?
  69. Parasitic oscillation? (picture)
  70. newbie question : driver/output relationship, input sensitivity
  71. Unknown tube logo
  72. Impedance, the 10x rule, losses & bandwidth
  73. el84/6bq5 PSE
  74. A very odd phase inverter- comments?
  75. Please check my work :)
  76. NOS purchase, should I be concerned?
  77. Strange splitter in the Audio Research D4
  78. 6ak5/5654 plate resistance
  79. What is the purpose of the g2 bypass cap?
  80. questionable 2a3 schematic
  81. A singular experiment with a unheated tube.
  82. Limited bass response in one channel
  83. Show me your fave phonostage circuits.
  84. tube heater voltage, how much is too much?
  85. Para feed choke
  86. Dynaco ST35 power?
  87. Tips/comments for upcoming 300B build
  88. page Eli Duttman's Simple p-p with 5965 MQ EXO-173 and 6AQ5
  89. DHT cathode follower idea
  90. GK71 Output Transformer
  91. Schematics for A.I. Mod 2D
  92. Determing Battery Voltage for cathode bias
  93. OT for audio but still tube
  94. Getting transfer characteristics
  95. Pentodes and Choke Loading
  96. Stepped airgap choke ?
  97. Noob question
  98. SE 300B Integrated Amp: Help choose circuit design
  99. SunAudio 2A3 to 300B
  100. Filament Snubber Cap Explodes! What happened?
  101. Alot of 12AX7's about
  102. DIY tube microphone preamp
  103. Wurlitzer/Fisher Amp Musings
  104. please check my work
  105. How to get cathode bias info from grid bias info?
  106. SE 300B Integrated Amp: Transformers
  107. Positive feedback, improperly drawn screen, or WTF?
  108. GE Console RC 7100 A - need some help!
  109. Output tube for 600V B+, 5800 ohm primary PP, tertiary 25% UL taps?
  110. Still tring to find a couple 100uf motor runs
  111. small push-pull amp to preamp
  112. Electraprint EL84 PP with PSA-2N
  113. Bogen MX-60A- output transformer bandwidth?
  114. 6AS7 Parallel Feed Amp
  115. Super 6BG6 vs. 6550
  116. 5687 line stage
  117. Audio Standards
  118. 4 x used 5867A (TB3/750) triodes
  119. 12au7 who has the best ultra low noise ???
  120. Questions about tweaking the Miniblok SET...
  121. The core -sonic reasons
  122. Removing pot from valve pre amp
  123. Power transformer question
  124. Tube construction materials
  125. LTP second grid
  126. How to figure out the bias point of fisher X-100A
  127. Schematic help! (Bell)
  128. Audio Note Soro SE SCHEMATICS
  129. 807 Tube Triode Connected
  130. Would you pls help.
  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. Tubes currently in production
  164. Rachel's Corner - Shuguang
  165. Small 50C5 Amp improvements
  166. Low voltage pentode?
  167. TX distortion
  168. DIY U-L curves
  169. Transformer spacing
  170. Covers for budget output transformers
  171. Correct for bipolar voltage doubler?
  172. Source for 100uf motor run cap.
  173. magnavox 185aa with 4-6v6
  174. Yaqin 300B re-biasing
  175. Diy Line Amp 5670
  176. Diy Line Amp Jp-80
  177. Quality difference between output transformers
  178. A group-build project for a tube power amp in India
  179. pilot light ideas please
  180. Small signal pentode - zener screen regulation - why not ??
  181. Another KT-88
  182. Losing the treble and transient response in this PX25 SE amp
  183. Rod Coleman filament supply circuit boards
  184. Calculating Zout for Pentode amp with NFB?
  185. Bypassing a volume pot
  186. Lab supply for cathode bias experiment question..
  187. Rheostat for adjustable "fixed" bias?
  188. Output transformer Question
  189. Real Cost of Decware Amplifiers
  190. Digitally driven tube pre-amp
  191. Real cost of Dynaco ST 70 Kits
  192. Oddball Console Amplifier
  193. Transistor phase splitter (Yaqin MC-84L)
  194. Shuguang to stop 845 and 211
  195. first project.
  196. Se Kt-66
  197. Is there a power supply guru?
  198. Direct Coupling question
  199. What's the best way to hook up an Isolation transformer
  200. Marzio &Jelasi's Direct Coupled SE Amp
  201. 6SN7 or 6SN7GT??
  202. HY40 Power Triode
  203. parallel capacitors in PS question
  204. Looking for feedback on Bottlehead amps
  205. First Watt F3 / Tube Audio Design TAD-125 Hibachi JFET amps
  206. S-5 Push Pull Power Supply Upgrade!
  207. Output Transformer Air Gap
  208. PCF80 -Designing a Pentode Constant Current Sink - help needed.
  209. Purity and simplicity of amp design
  210. DIY Dynaco ST70
  211. Help need some info on this Raytheon
  212. Isolating parallel feed amplifiers
  213. Please help for B+ problem!
  214. "Sallen-Key" Public domain?
  215. Transformer questions / Good headphones?
  216. Which Spud Amp?
  217. Very simple SE Triode Help
  218. Tube friendly speakers
  219. Counterpoint SA5000 schematic
  220. Yaqin MC-10L
  221. Screen Driven Dissimilar Pentode SE Anti-Triode Spud
  222. Power tube bias increasing with signal.
  223. Preamp suggestion required pls
  224. How to change deemphasis from 75uS to 50uS for Fisher FM100
  225. Which 300B ?
  226. Custom OT for 6C33C tube - any advice
  227. s-5 tube amp hum troubles
  228. Cathode feedback on Mikael's SE KT88?
  229. RCA tube rectifier
  230. 300B Schematic
  231. My first amp!
  232. Building a Aikido preamplifier
  233. Tube rolling causes failure...
  234. Briefly subjected heaters to about 12v by accident.
  235. She lives!
  236. Wilcox Gay 5U
  237. 6EM7 project: maybe use more sand?
  238. 12B4A SET - any critiques on this project?
  239. Heathkit Manual
  240. What is this??
  241. Amp and Speakers decision
  242. Question about Low Impedence Filters on a Bogen PA Head Need Info.
  243. Counterpoint 3.1
  244. good book for learning the basics of tubes and tube amps
  245. Heater circuit - to twist or not to twist
  246. Rock and Flame: Wavebourn Barracuda
  247. Low voltage rectifiers?
  248. Horz Sweep amp Pent or screen drive
  249. Lessons learned building a 5VDC Power Supply for a 300B heater
  250. Getting frustrated--- amps and speakers for the noob

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