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  1. Correct for bipolar voltage doubler?
  2. Source for 100uf motor run cap.
  3. magnavox 185aa with 4-6v6
  4. Yaqin 300B re-biasing
  5. Line Amp Diy 6j1
  6. Diy Line Amp£_£_6sn7
  7. Diy Line Amp Audio Note M7
  8. Diy Line Amp Cat Sl-1
  9. Diy Line Amp Malanz 7
  10. Diy Line Amp Htm
  11. Diy Line Amp 5670
  12. Diy Line Amp Jp-80
  13. Quality difference between output transformers
  14. A group-build project for a tube power amp in India
  15. pilot light ideas please
  16. Small signal pentode - zener screen regulation - why not ??
  17. Another KT-88
  18. Rod Coleman filament supply circuit boards
  19. Losing the treble and transient response in this PX25 SE amp
  20. Calculating Zout for Pentode amp with NFB?
  21. Bypassing a volume pot
  22. Lab supply for cathode bias experiment question..
  23. Rheostat for adjustable "fixed" bias?
  24. Output transformer Question
  25. Real Cost of Decware Amplifiers
  26. Digitally driven tube pre-amp
  27. Real cost of Dynaco ST 70 Kits
  28. Fake electrolytics?
  29. Oddball Console Amplifier
  30. Transistor phase splitter (Yaqin MC-84L)
  31. Shuguang to stop 845 and 211
  32. first project.
  33. Help on capacitor info...
  34. Se Kt-66
  35. Is there a power supply guru?
  36. Direct Coupling question
  37. What's the best way to hook up an Isolation transformer
  38. Marzio &Jelasi's Direct Coupled SE Amp
  39. 6SN7 or 6SN7GT??
  40. HY40 Power Triode
  41. parallel capacitors in PS question
  42. Looking for feedback on Bottlehead amps
  43. First Watt F3 / Tube Audio Design TAD-125 Hibachi JFET amps
  44. S-5 Push Pull Power Supply Upgrade!
  45. Capacitor voltage rating conversion
  46. Output Transformer Air Gap
  47. PCF80 -Designing a Pentode Constant Current Sink - help needed.
  48. Purity and simplicity of amp design
  49. watt meters
  50. DIY Dynaco ST70
  51. Help need some info on this Raytheon
  52. Isolating parallel feed amplifiers
  53. Please help for B+ problem!
  54. Second Tubelab Simple SE board done
  55. "Sallen-Key" Public domain?
  56. Transformer questions / Good headphones?
  57. Which Spud Amp?
  58. Very simple SE Triode Help
  59. Tube friendly speakers
  60. Counterpoint SA5000 schematic
  61. Yaqin MC-10L
  62. Screen Driven Dissimilar Pentode SE Anti-Triode Spud
  63. Power tube bias increasing with signal.
  64. Preamp suggestion required pls
  65. How to change deemphasis from 75uS to 50uS for Fisher FM100
  66. Which 300B ?
  67. Custom OT for 6C33C tube - any advice
  68. s-5 tube amp hum troubles
  69. Cathode feedback on Mikael's SE KT88?
  70. RCA tube rectifier
  71. 300B Schematic
  72. Tubelab wiring
  73. My first amp!
  74. Building a Aikido preamplifier
  75. Tube rolling causes failure...
  76. Briefly subjected heaters to about 12v by accident.
  77. She lives!
  78. Wilcox Gay 5U
  79. 6EM7 project: maybe use more sand?
  80. 12B4A SET - any critiques on this project?
  81. Heathkit Manual
  82. What is this??
  83. Amp and Speakers decision
  84. Question about Low Impedence Filters on a Bogen PA Head Need Info.
  85. counterpoint 3.1
  86. good book for learning the basics of tubes and tube amps
  87. Heater circuit - to twist or not to twist
  88. Rock and Flame: Wavebourn Barracuda
  89. Low voltage rectifiers?
  90. Horz Sweep amp Pent or screen drive
  91. Lessons learned building a 5VDC Power Supply for a 300B heater
  92. Getting frustrated--- amps and speakers for the noob
  93. Smallish chassis feasible? Multiple pics
  94. Using a Maida Regulator with a CCS
  95. Which Aikido pre-amp PCB for a newbie?
  96. Newbie wants to build Tubelab SE Monos.
  97. FM transmitter / PA
  98. What value attenuator would you use in front of a 396A in a preamp?
  99. Hybrid OTL Circlotron idea
  100. Heathkit aa-121
  101. Help please checking my B+ design
  102. Selenium rectifiers
  103. isolation transformer - high voltage.
  104. Cathode Bypass in a PP Output Stage
  105. Mcintosh Tube Amplifier Protection Circuit
  106. Where to start? Or: cool these plates down
  107. Hum trouble on old PA amp
  108. Crazy newbie tube driver question
  109. UHF tubes for audio?
  110. Suggestion for this tube preamp
  111. PCB Board software?
  112. 300B push pull amp
  113. Simple P-P 84 proto
  114. Keeping cost down?
  115. Tube Amp Kit for newbie
  116. 40% Tap direct to plate
  117. Funny bias problem in PP EL34. Please help
  118. Transformer from Heathkit A-7 amp
  119. Any tube stores in Burnaby, Vancouver, Canada?
  120. B+ time delay circuit - your comments
  121. PCB mount line input transformer question
  122. SRPP circuit question
  123. Russian tubes - what pin material?
  124. Auto-bias - easy to convert to or not?
  125. old style anode/grid caps
  126. 6H30 Dual Triode
  127. Why would the frequency response vary so much on a pair of Monoblock amps?
  128. Disassembling output transformer
  129. Tube sockets
  130. H. P. Friedrichs
  131. The Rebuilding of Theta KT-88 Tube amp.
  132. Please check my PS pcb board layout for problems????
  133. glass capacitors
  134. Help w/fixing counterpoint Sa7 preamp
  135. IXYS 10M45 CCS IC question
  136. Wing-C 300B tubes and opinions
  137. PX25 DRD Power amp.
  138. rectifier tube recommendation please
  139. 6C33C to more standard triode conversion - any ideas?
  140. PP EL84 Build Questions (Bevois Valley)
  141. Tube line stage output impedance
  142. volume between gain stages
  143. Dyna ST70 PWR Tranny 6.3V Crnt Spec?
  144. Next Project - Darling Amplifier or 45
  145. tube magazines
  146. PSU choke help please
  147. PCB Trace properties for PP tube amplifier ( 12AQ5, 6v6 etc)
  148. TubelabSE phase
  149. EML 300B XLS and Mesh comparison
  150. UL - triode switch
  151. Spud anyone?
  152. Nooo! Almost have this amp built!
  153. Need help - Old cap can ID
  154. 16SL7+6SN7 Aikido
  155. 1600Hz Transformer?
  156. Anyone have a Bogen MX 60 Schematic they can post
  157. mc100b burned up
  158. DC heating, parallel diodes
  159. Identify Amperex Tube?
  160. Which speaker tap when going from UL to triode
  161. Tube wont bias...
  162. DIY stepped attenuator
  163. TV-7/DU KT88 Settings?
  164. Filmosound - Tone Knob - Tertiaries
  165. Hybrid Amp, Tube+MOS FET SE
  166. 3.1 integrated possible?
  167. Plate choke material, why to use amorphous core?
  168. Anything obviously wrong with my mic pre amp ?
  169. K-502 or Yamaha RX-V361 for Klipsch F-1?
  170. Help diagnosing phase-splitter
  171. question about Bruce's GGP preamp
  172. interpreting max. values listed in datasheet
  173. zenith mlt 15 console record player problem
  174. ORIENTED or Not ORIENTED cores for OPT
  175. Audio Research SP-3-A-1 modified.........
  176. Tube heaters in series.
  177. Output transformer listening impressions?
  178. Tube buffer 6H6P after a DAC
  179. S-5 K16LS in enclosure - Pics
  180. Time to mourn the death of Broskie's Tube CAD blog?
  181. 6N6P preamp
  182. our Preamplifier using 2J27S tubes
  183. dc filament design question
  184. 6AV6A for meter driver
  185. AC wiring heaters, A or B ?
  186. Aikido preamp muting
  187. Help! New Yaoin MC-100B with intermittent crackling noise from speakers
  188. hummming YAHA
  189. leave a variac on all the time!
  190. More triodes
  191. Full Wave Rectifier
  192. Blowing B+ fuse
  193. PSRR of CF w/ CCS Sink
  194. MENG Series "EL34B" Integrated Amplifier
  195. Concertina Parafeed, or How to mess with OldEurope's mind...
  196. Phono stage success!
  197. A few pretty pictures and an ugly picture
  198. Rectifier with slow start up?
  199. Calibrating an emission tester
  200. What is this?
  201. 4XKT88 drive
  202. EL84 driven 2a3
  203. need suggestions for "standarizing" tube gain stages
  204. How long until someone tries
  205. Hickok Photo History - hidden web gem!
  206. Common Audio Tubes in standard use
  207. tango input transformer NN-6
  208. Filmosound dual pot
  209. Hi power Moskido with A/B output Bias
  210. how easy to make tube amp?
  211. metal film resistors or carbon?
  212. Quad II tubes replacement
  213. Sirius & FM
  214. Can someone look at a Counterpoint SA7 for me?
  215. The Wintersweet High-Vividity Project
  216. loftin white 801 amp
  217. Pics of unique design of amp chassis?
  218. Heathkit AA-32 modifications / upgrades
  219. Tango XE-20S Specification
  220. Question about Edcor output transformer
  221. SE EL84 output stage?
  222. New ST-70 Driver board from Blackburn Audio
  223. Transformer primary rating question
  224. Heathkit A7(c?) Rebuild
  225. Rewiring a socket to take 6GK6 instead of 6BQ5
  226. 317 CCS Question
  227. Active filter design software
  228. Larry Moore 10Y Squared
  229. Do you hear “pop” when you turn off your amp?
  230. Simple tube phono stage
  231. Tube phono amp repair/redesign help wanted
  232. tube newbie needs guidance
  233. Interesting linestage optimizing ideas
  234. Powered up my Lafayette 224A for the first time!
  235. Hickok Upgrades
  236. Passive BP filter sim results
  237. 100mA heater tubes for phono
  238. Audiotester + M-audio - info + question
  239. Indestructible HV hybrid regulator!
  240. yet another modified 5-20 amplifier
  241. help with OT for 15 watt tube amp
  242. Power supply for 12SL7 phono preamp
  243. few questions
  244. mystery 5881
  245. does lower B+ cause scratchy distortion?
  246. SY please keep us updated about your site
  247. Cleveland Ohio members?
  248. Scope tricks for detecting rectifier/choke switching
  249. To choke or not to choke
  250. Tube rectified LC PS for 6SN7 Aikido - choke DCR question

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