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  1. RJM with 12AY7
  2. Bias winding to power sand
  3. FM Tube radio design
  4. What do you use? Not technical but relative.
  5. looking for a pre-amp schematic
  6. I have waay too many 6DJ8's
  7. Tango NP126
  8. Two 6J5 versus one 6SN7
  9. Bunch of questions regarding plate CCS and some else.
  10. Tube Store in Washington DC (6C33C Triode Buy Where??)
  11. Scott 399 Receiver Schematics?
  12. Need help with 6l6GC choices
  13. Need Hammond/Everett drawings.
  14. 6V6 PP-based Baby Huey/Mullard inspired design needed...
  15. Ecf80
  16. Please Explain difference Mono vs Push Pull vs Single End etc
  17. VU Meters
  18. diy preamps, bottlehead, decware....
  19. Power supply choke help needed
  20. LED cathode biasing in push-pull input stage
  21. applying fixed bias to cathode followers
  22. Battieries for B+
  23. Put amp in chassis, then, right channel doesn't work!
  24. hammond transformers?
  25. Two Rectifiers, One transformer
  26. Cool problem with Marshall TSL!!!
  27. Tubes currently in production
  28. Rachel's Corner - Shuguang
  29. Small 50C5 Amp improvements
  30. Low voltage pentode?
  31. TX distortion
  32. DIY U-L curves
  33. Transformer spacing
  34. Covers for budget output transformers
  35. Correct for bipolar voltage doubler?
  36. Source for 100uf motor run cap.
  37. magnavox 185aa with 4-6v6
  38. Yaqin 300B re-biasing
  39. Line Amp Diy 6j1
  40. Diy Line Amp£_£_6sn7
  41. Diy Line Amp Audio Note M7
  42. Diy Line Amp Cat Sl-1
  43. Diy Line Amp Malanz 7
  44. Diy Line Amp Htm
  45. Diy Line Amp Jp-80
  46. Diy Line Amp 5670
  47. Quality difference between output transformers
  48. A group-build project for a tube power amp in India
  49. pilot light ideas please
  50. Small signal pentode - zener screen regulation - why not ??
  51. Another KT-88
  52. Rod Coleman filament supply circuit boards
  53. Losing the treble and transient response in this PX25 SE amp
  54. Calculating Zout for Pentode amp with NFB?
  55. Bypassing a volume pot
  56. Lab supply for cathode bias experiment question..
  57. Rheostat for adjustable "fixed" bias?
  58. Output transformer Question
  59. Real Cost of Decware Amplifiers
  60. Digitally driven tube pre-amp
  61. Real cost of Dynaco ST 70 Kits
  62. Fake electrolytics?
  63. Oddball Console Amplifier
  64. Transistor phase splitter (Yaqin MC-84L)
  65. Shuguang to stop 845 and 211
  66. first project.
  67. Help on capacitor info...
  68. Se Kt-66
  69. Is there a power supply guru?
  70. Direct Coupling question
  71. What's the best way to hook up an Isolation transformer
  72. Marzio &Jelasi's Direct Coupled SE Amp
  73. 6SN7 or 6SN7GT??
  74. HY40 Power Triode
  75. parallel capacitors in PS question
  76. Looking for feedback on Bottlehead amps
  77. First Watt F3 / Tube Audio Design TAD-125 Hibachi JFET amps
  78. S-5 Push Pull Power Supply Upgrade!
  79. Capacitor voltage rating conversion
  80. Output Transformer Air Gap
  81. PCF80 -Designing a Pentode Constant Current Sink - help needed.
  82. Purity and simplicity of amp design
  83. watt meters
  84. DIY Dynaco ST70
  85. Help need some info on this Raytheon
  86. Isolating parallel feed amplifiers
  87. Please help for B+ problem!
  88. Second Tubelab Simple SE board done
  89. "Sallen-Key" Public domain?
  90. Transformer questions / Good headphones?
  91. Which Spud Amp?
  92. Very simple SE Triode Help
  93. Tube friendly speakers
  94. Counterpoint SA5000 schematic
  95. Yaqin MC-10L
  96. Screen Driven Dissimilar Pentode SE Anti-Triode Spud
  97. Power tube bias increasing with signal.
  98. Preamp suggestion required pls
  99. How to change deemphasis from 75uS to 50uS for Fisher FM100
  100. Which 300B ?
  101. Custom OT for 6C33C tube - any advice
  102. s-5 tube amp hum troubles
  103. Cathode feedback on Mikael's SE KT88?
  104. RCA tube rectifier
  105. 300B Schematic
  106. Tubelab wiring
  107. My first amp!
  108. Building a Aikido preamplifier
  109. Tube rolling causes failure...
  110. Briefly subjected heaters to about 12v by accident.
  111. She lives!
  112. Wilcox Gay 5U
  113. 6EM7 project: maybe use more sand?
  114. 12B4A SET - any critiques on this project?
  115. Heathkit Manual
  116. What is this??
  117. Amp and Speakers decision
  118. Hey guitar joe...
  119. Question about Low Impedence Filters on a Bogen PA Head Need Info.
  120. counterpoint 3.1
  121. good book for learning the basics of tubes and tube amps
  122. Heater circuit - to twist or not to twist
  123. Rock and Flame: Wavebourn Barracuda
  124. Low voltage rectifiers?
  125. Horz Sweep amp Pent or screen drive
  126. Lessons learned building a 5VDC Power Supply for a 300B heater
  127. Getting frustrated--- amps and speakers for the noob
  128. Smallish chassis feasible? Multiple pics
  129. Using a Maida Regulator with a CCS
  130. Which Aikido pre-amp PCB for a newbie?
  131. Newbie wants to build Tubelab SE Monos.
  132. FM transmitter / PA
  133. What value attenuator would you use in front of a 396A in a preamp?
  134. Hybrid OTL Circlotron idea
  135. Heathkit aa-121
  136. Help please checking my B+ design
  137. Selenium rectifiers
  138. isolation transformer - high voltage.
  139. Cathode Bypass in a PP Output Stage
  140. Mcintosh Tube Amplifier Protection Circuit
  141. Where to start? Or: cool these plates down
  142. epiphone pacemaker 50 t
  143. Hum trouble on old PA amp
  144. Crazy newbie tube driver question
  145. UHF tubes for audio?
  146. Suggestion for this tube preamp
  147. PCB Board software?
  148. 300B push pull amp
  149. Simple P-P 84 proto
  150. Keeping cost down?
  151. Tube Amp Kit for newbie
  152. 40% Tap direct to plate
  153. Funny bias problem in PP EL34. Please help
  154. Transformer from Heathkit A-7 amp
  155. Any tube stores in Burnaby, Vancouver, Canada?
  156. B+ time delay circuit - your comments
  157. PCB mount line input transformer question
  158. SRPP circuit question
  159. Russian tubes - what pin material?
  160. Auto-bias - easy to convert to or not?
  161. old style anode/grid caps
  162. 6H30 Dual Triode
  163. Why would the frequency response vary so much on a pair of Monoblock amps?
  164. Disassembling output transformer
  165. Tube sockets
  166. H. P. Friedrichs
  167. The Rebuilding of Theta KT-88 Tube amp.
  168. Please check my PS pcb board layout for problems????
  169. glass capacitors
  170. Help w/fixing counterpoint Sa7 preamp
  171. IXYS 10M45 CCS IC question
  172. Wing-C 300B tubes and opinions
  173. PX25 DRD Power amp.
  174. rectifier tube recommendation please
  175. 6C33C to more standard triode conversion - any ideas?
  176. PP EL84 Build Questions (Bevois Valley)
  177. Tube line stage output impedance
  178. volume between gain stages
  179. Dyna ST70 PWR Tranny 6.3V Crnt Spec?
  180. Next Project - Darling Amplifier or 45
  181. tube magazines
  182. PSU choke help please
  183. PCB Trace properties for PP tube amplifier ( 12AQ5, 6v6 etc)
  184. TubelabSE phase
  185. EML 300B XLS and Mesh comparison
  186. UL - triode switch
  187. Spud anyone?
  188. Nooo! Almost have this amp built!
  189. Need help - Old cap can ID
  190. 16SL7+6SN7 Aikido
  191. 1600Hz Transformer?
  192. Anyone have a Bogen MX 60 Schematic they can post
  193. mc100b burned up
  194. DC heating, parallel diodes
  195. Identify Amperex Tube?
  196. Which speaker tap when going from UL to triode
  197. Tube wont bias...
  198. DIY stepped attenuator
  199. TV-7/DU KT88 Settings?
  200. Filmosound - Tone Knob - Tertiaries
  201. Hybrid Amp, Tube+MOS FET SE
  202. 3.1 integrated possible?
  203. Plate choke material, why to use amorphous core?
  204. Anything obviously wrong with my mic pre amp ?
  205. K-502 or Yamaha RX-V361 for Klipsch F-1?
  206. Help diagnosing phase-splitter
  207. question about Bruce's GGP preamp
  208. Rickenbacher amp HELP!!!
  209. interpreting max. values listed in datasheet
  210. zenith mlt 15 console record player problem
  211. ORIENTED or Not ORIENTED cores for OPT
  212. Audio Research SP-3-A-1 modified.........
  213. Tube heaters in series.
  214. Output transformer listening impressions?
  215. Tube buffer 6H6P after a DAC
  216. S-5 K16LS in enclosure - Pics
  217. Time to mourn the death of Broskie's Tube CAD blog?
  218. 6N6P preamp
  219. our Preamplifier using 2J27S tubes
  220. dc filament design question
  221. 6AV6A for meter driver
  222. AC wiring heaters, A or B ?
  223. Aikido preamp muting
  224. Help! New Yaoin MC-100B with intermittent crackling noise from speakers
  225. hummming YAHA
  226. leave a variac on all the time!
  227. More triodes
  228. Full Wave Rectifier
  229. Blowing B+ fuse
  230. PSRR of CF w/ CCS Sink
  231. MENG Series "EL34B" Integrated Amplifier
  232. Concertina Parafeed, or How to mess with OldEurope's mind...
  233. Phono stage success!
  234. A few pretty pictures and an ugly picture
  235. Rectifier with slow start up?
  236. Calibrating an emission tester
  237. What is this?
  238. 4XKT88 drive
  239. EL84 driven 2a3
  240. need suggestions for "standarizing" tube gain stages
  241. How long until someone tries
  242. Hickok Photo History - hidden web gem!
  243. Common Audio Tubes in standard use
  244. tango input transformer NN-6
  245. Filmosound dual pot
  246. Hi power Moskido with A/B output Bias
  247. how easy to make tube amp?
  248. metal film resistors or carbon?
  249. Quad II tubes replacement
  250. Sirius & FM

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