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  1. Bias winding to power sand
  2. FM Tube radio design
  3. What do you use? Not technical but relative.
  4. looking for a pre-amp schematic
  5. I have waay too many 6DJ8's
  6. Tango NP126
  7. Two 6J5 versus one 6SN7
  8. Bunch of questions regarding plate CCS and some else.
  9. Tube Store in Washington DC (6C33C Triode Buy Where??)
  10. Scott 399 Receiver Schematics?
  11. Need help with 6l6GC choices
  12. Need Hammond/Everett drawings.
  13. 6V6 PP-based Baby Huey/Mullard inspired design needed...
  14. Ecf80
  15. Please Explain difference Mono vs Push Pull vs Single End etc
  16. VU Meters
  17. diy preamps, bottlehead, decware....
  18. Power supply choke help needed
  19. LED cathode biasing in push-pull input stage
  20. applying fixed bias to cathode followers
  21. Battieries for B+
  22. Put amp in chassis, then, right channel doesn't work!
  23. hammond transformers?
  24. Two Rectifiers, One transformer
  25. Cool problem with Marshall TSL!!!
  26. Tubes currently in production
  27. Rachel's Corner - Shuguang
  28. Small 50C5 Amp improvements
  29. Low voltage pentode?
  30. TX distortion
  31. DIY U-L curves
  32. Transformer spacing
  33. Covers for budget output transformers
  34. Correct for bipolar voltage doubler?
  35. Source for 100uf motor run cap.
  36. magnavox 185aa with 4-6v6
  37. Yaqin 300B re-biasing
  38. Line Amp Diy 6j1
  39. Diy Line Amp£_£_6sn7
  40. Diy Line Amp Audio Note M7
  41. Diy Line Amp Cat Sl-1
  42. Diy Line Amp Malanz 7
  43. Diy Line Amp Htm
  44. Diy Line Amp Jp-80
  45. Diy Line Amp 5670
  46. Quality difference between output transformers
  47. A group-build project for a tube power amp in India
  48. pilot light ideas please
  49. Small signal pentode - zener screen regulation - why not ??
  50. Another KT-88
  51. Rod Coleman filament supply circuit boards
  52. Losing the treble and transient response in this PX25 SE amp
  53. Calculating Zout for Pentode amp with NFB?
  54. Bypassing a volume pot
  55. Lab supply for cathode bias experiment question..
  56. Rheostat for adjustable "fixed" bias?
  57. Output transformer Question
  58. Real Cost of Decware Amplifiers
  59. Digitally driven tube pre-amp
  60. Real cost of Dynaco ST 70 Kits
  61. Fake electrolytics?
  62. Oddball Console Amplifier
  63. Transistor phase splitter (Yaqin MC-84L)
  64. Shuguang to stop 845 and 211
  65. first project.
  66. Help on capacitor info...
  67. Se Kt-66
  68. Is there a power supply guru?
  69. Direct Coupling question
  70. What's the best way to hook up an Isolation transformer
  71. Marzio &Jelasi's Direct Coupled SE Amp
  72. 6SN7 or 6SN7GT??
  73. HY40 Power Triode
  74. parallel capacitors in PS question
  75. Looking for feedback on Bottlehead amps
  76. First Watt F3 / Tube Audio Design TAD-125 Hibachi JFET amps
  77. S-5 Push Pull Power Supply Upgrade!
  78. Capacitor voltage rating conversion
  79. Output Transformer Air Gap
  80. PCF80 -Designing a Pentode Constant Current Sink - help needed.
  81. Purity and simplicity of amp design
  82. watt meters
  83. DIY Dynaco ST70
  84. Help need some info on this Raytheon
  85. Isolating parallel feed amplifiers
  86. Please help for B+ problem!
  87. Second Tubelab Simple SE board done
  88. "Sallen-Key" Public domain?
  89. Transformer questions / Good headphones?
  90. Which Spud Amp?
  91. Very simple SE Triode Help
  92. Tube friendly speakers
  93. Counterpoint SA5000 schematic
  94. Yaqin MC-10L
  95. Screen Driven Dissimilar Pentode SE Anti-Triode Spud
  96. Power tube bias increasing with signal.
  97. Preamp suggestion required pls
  98. How to change deemphasis from 75uS to 50uS for Fisher FM100
  99. Which 300B ?
  100. Custom OT for 6C33C tube - any advice
  101. s-5 tube amp hum troubles
  102. Cathode feedback on Mikael's SE KT88?
  103. RCA tube rectifier
  104. 300B Schematic
  105. Tubelab wiring
  106. My first amp!
  107. Building a Aikido preamplifier
  108. Tube rolling causes failure...
  109. Briefly subjected heaters to about 12v by accident.
  110. She lives!
  111. Wilcox Gay 5U
  112. 6EM7 project: maybe use more sand?
  113. 12B4A SET - any critiques on this project?
  114. Heathkit Manual
  115. What is this??
  116. Amp and Speakers decision
  117. Hey guitar joe...
  118. Question about Low Impedence Filters on a Bogen PA Head Need Info.
  119. counterpoint 3.1
  120. good book for learning the basics of tubes and tube amps
  121. Heater circuit - to twist or not to twist
  122. Rock and Flame: Wavebourn Barracuda
  123. Low voltage rectifiers?
  124. Horz Sweep amp Pent or screen drive
  125. Lessons learned building a 5VDC Power Supply for a 300B heater
  126. Getting frustrated--- amps and speakers for the noob
  127. Smallish chassis feasible? Multiple pics
  128. Using a Maida Regulator with a CCS
  129. Which Aikido pre-amp PCB for a newbie?
  130. Newbie wants to build Tubelab SE Monos.
  131. FM transmitter / PA
  132. What value attenuator would you use in front of a 396A in a preamp?
  133. Hybrid OTL Circlotron idea
  134. Heathkit aa-121
  135. Help please checking my B+ design
  136. Selenium rectifiers
  137. isolation transformer - high voltage.
  138. Cathode Bypass in a PP Output Stage
  139. Mcintosh Tube Amplifier Protection Circuit
  140. Where to start? Or: cool these plates down
  141. epiphone pacemaker 50 t
  142. Hum trouble on old PA amp
  143. Crazy newbie tube driver question
  144. UHF tubes for audio?
  145. Suggestion for this tube preamp
  146. PCB Board software?
  147. 300B push pull amp
  148. Simple P-P 84 proto
  149. Keeping cost down?
  150. Tube Amp Kit for newbie
  151. 40% Tap direct to plate
  152. Funny bias problem in PP EL34. Please help
  153. Transformer from Heathkit A-7 amp
  154. Any tube stores in Burnaby, Vancouver, Canada?
  155. B+ time delay circuit - your comments
  156. PCB mount line input transformer question
  157. SRPP circuit question
  158. Russian tubes - what pin material?
  159. Auto-bias - easy to convert to or not?
  160. old style anode/grid caps
  161. 6H30 Dual Triode
  162. Why would the frequency response vary so much on a pair of Monoblock amps?
  163. Disassembling output transformer
  164. Tube sockets
  165. H. P. Friedrichs
  166. The Rebuilding of Theta KT-88 Tube amp.
  167. Please check my PS pcb board layout for problems????
  168. glass capacitors
  169. Help w/fixing counterpoint Sa7 preamp
  170. IXYS 10M45 CCS IC question
  171. Wing-C 300B tubes and opinions
  172. PX25 DRD Power amp.
  173. rectifier tube recommendation please
  174. 6C33C to more standard triode conversion - any ideas?
  175. PP EL84 Build Questions (Bevois Valley)
  176. Tube line stage output impedance
  177. volume between gain stages
  178. Dyna ST70 PWR Tranny 6.3V Crnt Spec?
  179. Next Project - Darling Amplifier or 45
  180. tube magazines
  181. PSU choke help please
  182. PCB Trace properties for PP tube amplifier ( 12AQ5, 6v6 etc)
  183. TubelabSE phase
  184. EML 300B XLS and Mesh comparison
  185. UL - triode switch
  186. Spud anyone?
  187. Nooo! Almost have this amp built!
  188. Need help - Old cap can ID
  189. 16SL7+6SN7 Aikido
  190. 1600Hz Transformer?
  191. Anyone have a Bogen MX 60 Schematic they can post
  192. mc100b burned up
  193. DC heating, parallel diodes
  194. Identify Amperex Tube?
  195. Which speaker tap when going from UL to triode
  196. Tube wont bias...
  197. DIY stepped attenuator
  198. TV-7/DU KT88 Settings?
  199. Filmosound - Tone Knob - Tertiaries
  200. Hybrid Amp, Tube+MOS FET SE
  201. 3.1 integrated possible?
  202. Plate choke material, why to use amorphous core?
  203. Anything obviously wrong with my mic pre amp ?
  204. K-502 or Yamaha RX-V361 for Klipsch F-1?
  205. Help diagnosing phase-splitter
  206. question about Bruce's GGP preamp
  207. Rickenbacher amp HELP!!!
  208. interpreting max. values listed in datasheet
  209. zenith mlt 15 console record player problem
  210. ORIENTED or Not ORIENTED cores for OPT
  211. Audio Research SP-3-A-1 modified.........
  212. Tube heaters in series.
  213. Output transformer listening impressions?
  214. Tube buffer 6H6P after a DAC
  215. S-5 K16LS in enclosure - Pics
  216. Time to mourn the death of Broskie's Tube CAD blog?
  217. 6N6P preamp
  218. our Preamplifier using 2J27S tubes
  219. dc filament design question
  220. 6AV6A for meter driver
  221. AC wiring heaters, A or B ?
  222. Aikido preamp muting
  223. Help! New Yaoin MC-100B with intermittent crackling noise from speakers
  224. hummming YAHA
  225. leave a variac on all the time!
  226. More triodes
  227. Full Wave Rectifier
  228. Blowing B+ fuse
  229. PSRR of CF w/ CCS Sink
  230. MENG Series "EL34B" Integrated Amplifier
  231. Concertina Parafeed, or How to mess with OldEurope's mind...
  232. Phono stage success!
  233. A few pretty pictures and an ugly picture
  234. Rectifier with slow start up?
  235. Calibrating an emission tester
  236. What is this?
  237. 4XKT88 drive
  238. EL84 driven 2a3
  239. need suggestions for "standarizing" tube gain stages
  240. How long until someone tries
  241. Hickok Photo History - hidden web gem!
  242. Common Audio Tubes in standard use
  243. tango input transformer NN-6
  244. Filmosound dual pot
  245. Hi power Moskido with A/B output Bias
  246. how easy to make tube amp?
  247. metal film resistors or carbon?
  248. Quad II tubes replacement
  249. Sirius & FM
  250. Can someone look at a Counterpoint SA7 for me?

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