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  1. 50C5 conversion
  2. Sa-5.1 blow fuse
  3. Hum problem of preamp
  4. Chassis ground blows fuse
  5. 7193 (2c22) preamp buzz/hum
  6. Se Opt
  7. Does anhone use those switching power supply for the heaters?
  8. Tube Minidoc, featuring New York Noise
  9. Help Choosing A Sowter Trans For My DAC?
  10. fisher 800c clipping at ultra low volume
  11. "audiodigit" tubalizer & tubepre original schematic
  12. Dht Guitar Amps
  13. rating of series caps
  14. F704
  15. tube socket PCB library or dimensions
  16. motorboating
  17. 6AN8 Triode connection + EL 84 PP
  18. Please help amend 6AS7PP circuit
  19. El84 Pp
  20. 6V6 Ultralinear
  21. Dear Moderators
  22. 845 se
  23. Bell 2122-B integrated amp - tube suggestions
  24. Wirewound pot for Rk
  25. KT88/90 F2011 Schematic
  26. United Electric 967
  27. Scott 222c mods...?
  28. Switching supply for 300B filaments
  29. ECF80/6BL8
  30. 24v tube buffer & line stage schematic
  31. Vintage gear hunting
  32. Seperate PSU Transformers? Filament Supplys?
  33. 828 is better
  34. Hum on a choke loaded stage
  35. SE Transformer question
  36. Design question - How to make amp porn visible?
  37. Leak Stereo 20 - Johan's Square Wave Theory
  38. K-12G First Time Build
  39. Vishay vt52-55 resistors in a tube amp
  40. EL84 Push-Pull ccs bias
  41. Eight 807's in Push Pull?
  42. Working with Current O/P DAC Chips
  43. Unison research Preludio schematic
  44. Rewinding Power transformer
  45. Information needed on RCA SPECIAL RED TUBES
  46. Score?
  47. Herron phono
  48. tube preamp + SS power amp.
  49. Puzzler
  50. HI-Fi 6p13p
  51. Resistor values
  52. To chassies SE amp,PSU question
  53. Grounding & board Layout questions
  54. Look for a beefy driver tube.
  55. ECC81
  56. 5687 v.s. 6922 preamp/xover
  57. amorphous iron core good or not
  58. Pre-Amp
  59. submini tube preamp is a success
  60. Roll off frequency.
  61. Materials Technology for Electron Tubes by Walter H. Kohl
  62. Grundig TK 46 manual
  63. I'm anti-expensive audio parts but man, a good capacitor can make a difference
  64. How to determine a tube is shorted?
  65. Power supply problem
  66. SS power trans for tube experiments
  67. how to set output current on G Pimm's CCS circuit?
  68. Tube testing questions
  69. Push Pull Output Transformer wiring problem
  70. shunt regulator using VR tubes (with ccs like g pimm) and circuit load
  71. Stepped attenuators vs. Carbon pots
  72. hum/buzz with pot all the way up
  73. Cap and resistor types in guitar tube amp
  74. VacuTrace ... In Chicago?
  75. Lifesaver question on earthing
  76. Affordable, but good attenuators?
  77. Gu50 Set ?
  78. mounting an EL34 upside-down
  79. Direct coupled PP 2a3 amp - maths needed!!
  80. My 1st scratch build complete......
  81. Very Basic EL84 or EL34 DIY Amp
  82. Curcio Daniel Preamp Mods?
  83. Tube designs: 45 driving 45/2a3/300b?
  84. Adding secondary of output transformer into cathodes of output stage ? Eico ST-70
  85. Marantz 8 B : Output Transformer
  86. has anyone used a fan on their project?
  87. Audio Research SP12 heater arrangement
  88. tv damper diodes
  89. volume pot quite close to a tube - is this okay?
  90. UTC s42 special series
  91. 6H30P preamp schematics
  92. Digital potentiometer corrupt tube amps
  93. Alternative filament supply for 01A line stage
  94. Lamination Size
  95. Yaqin MC10L and KT88
  96. Help me read tube data sheets
  97. Quick Question (Driving 6L6GC's)
  98. Cause for concern -- scorch mark in tube
  99. why not 10k pot
  100. Dynaco Stereo 70 Output Transformer
  101. 6CJ3 rectifier or 6D22S rectifier
  102. Back-to-Back trannies
  103. Spring Reverb transformer
  104. Hamfest in Toronto area next weekend
  105. st70 bass response
  106. Triode "Champ" transformer v Edcor
  107. Low vs High aka Series vs Parallel Filaments
  108. Bogen monster MO200A schematic
  109. The Great Tempe Audio Shootout
  110. opinions on this p-p kt88
  111. Any XLR Tube Buffer Plans?
  112. Mystery transformers
  113. I need help with my next project
  114. A thought on Cathode feedback
  115. EL34 SE, direct coupled
  116. Ccs
  117. Hybrid amp: ECH83 + TDA2030A
  118. Leaving tube preamp always powered on.
  119. Variable 6922 heater to cathode voltage limit...?
  120. Is this risky?
  121. What to do with some WE tubes and others
  122. 6B4G SRPP
  123. pentode in triode mode SE vs a DHT SE like 2a3/300b
  124. dynakit decware bottlehead ... which to pick
  125. 6JC6 triode strapped?
  126. Searching for Raw Turrets
  127. Help.. EZ81 power supply diagram
  128. Ear 8l6
  129. Bogen H-30 guitar mod
  130. Voltage measurements from a blown 5AR4 vs. good 5Y3
  131. Sanity check on a 2A3 ultrapath with Pentode driver
  132. Star ground with dissimilar metals: concern?
  133. 5AR4 marked as 5V4GA?
  134. Calculating cathode bypass cap.
  135. Please need help! TUBE BIAS PROBE
  136. Aikido Phono Stage
  137. Using an El84 as a driver
  138. Transfromer value of this 300B circuit
  139. Chassis Layout & PS questions
  140. help needed for 1st DIY tube amp - Sakuma 845 SE
  141. Ideas for 4v filament triodes/pentodes
  142. Comments on Power Amp Viability
  143. Balanced active crossover advice
  144. The Tube Center
  145. Help1 with a 3 channel 2a3 amplifier
  146. volume control hum/noise
  147. PS choke magnetic induction
  148. Circlotron power supply question
  149. Autoformer as choke?
  150. E182CC
  151. Fender Hotrod Deville 212
  152. Grundig Fine Arts OTL Amplifier
  153. Damper diodes, 6ax4 and or 6w4?
  154. Knight 333 / Pioneer SX 34B info needed.
  155. Gargantuan Linestage Output Capacitors
  156. Quad II Restoration
  157. Help identifying a tube.
  158. Tube filaments in series?
  159. Design of Resonant Input Choke PSU
  160. Dissimilar triode
  161. How important is the quality of a triode used as a cathode follower
  162. EL34B tubes
  163. Why not so common to split dual triodes between channels?
  164. In search of power supply schematic for phono preamp
  165. General Electric vs Toshiba 6L6's
  166. Audio Research Dual 75 Capacitor Source?
  167. Choosing A Cathode bypass capacitor
  168. 12AU7 SRPP buffer suggestions
  169. Pentode/triode switch question
  170. Lundahll 1669A Secondary voltage???
  171. Substituting tube rectifiers by silicon
  172. newbie question: is the connection to the output xformer somewhat odd?
  173. All quiet on the SN front - about darned time!
  174. Estimating power output
  175. Looking for KT88 Amplifier Schematic by Mikael Abdellah
  176. Comments on passive pre and cables
  177. curvecaptor
  178. 6b4g pushpull build!newbie
  179. Need help; I have "dog leg" shaped waveform on my amp
  180. Output Transformer Question?
  181. Urgent OT HELP needed ASAP please
  182. Questions on Triode Strapping
  183. Morgan Jones BALANCED?
  184. What are your RFI precautions?
  185. Pentodes without cathodes?
  186. help me
  187. Good quality 6600 CT OT
  188. Local Hamfest score!!!
  189. Unknown Transformer
  190. S5 11g help
  191. 6SN7 pre-amp
  192. These tube can be use for amplifier
  193. Any pitfalls to choke derived CT?
  194. Audio Research D76A bias adjustment
  195. I meet Mr. Morgan Jones
  196. st70 electrolytic caps
  197. Thank you SY
  198. el84 1 channel stopped working help
  199. Help! Weak Bass!
  200. never say never - 300B amps...
  201. 6aq5 Screen resistor?
  202. L. Tatro farm radios from 1930's.
  203. Published/DIY ultra-low THD designs?
  204. EL84 SE auto bias
  205. Kofi Annan in: "Oscillatin' in the Bevois Valley'"
  206. Subwoofer connections
  207. 6/30L2 - What to do with them ?
  208. PIONEER SA-810 Tube Amp Schematics
  209. EF86 Gm
  210. EL84/6BQ5 Ultra-Linear Push-Pull Recomendation
  211. Aria 6P14 makeover.
  212. switch for paralelled tube
  213. Curvecaptor with pentodes??
  214. Ground point for HF decoupling cap?
  215. Cancelling Harmonics
  216. Quiet Tube
  217. LM385 Adjustable voltage ref. diode as LED bias?
  218. Tubed Expression Pedal
  219. Any spice models around for AA5-esque battery tubes?
  220. Where to connect shielding
  221. Bogen K15 convert to guitar amp
  222. Help 805 As that the friend makes to straighten even gallbladder machine
  223. studiogear of the beatles
  224. 6AK5 Triode Curves
  225. twisted pair signal, source selector and ground buss???
  226. Tiny Amplifiers
  227. A newly aquired Hum
  228. many jan tubes
  229. is this the correct way of adding a volume control?
  230. Basic DIY Valve Phono Stage
  231. 5879 Experience?
  232. personal jobs
  233. Wanted Triode strapped curves for pentode of ECL82.
  234. source selector / volume hum in Aikido
  235. DHTs and Cathode Bias
  236. Best SET driver stage with lots of B+?
  237. Tube Library Pspice error
  238. referencing DC heater to B+
  239. Double floating Circlotron
  240. Supply Capacitors ?
  241. Sakuma style Tango project
  242. MC10L is good or not
  243. Eico HF-20 & Claus Byrith PS voltage & power draw
  244. Voltage Regulator Tubes
  245. EL34 triode-connected grounding-grid curves?
  246. Pls help me understand AR SP6 circuit
  247. good begginer project (ax84 v.s. boozhound)
  248. I'm looking for 417a/5842 Preamp Schematic without any Transformer, any suggestion ?
  249. Trouble in a new DIY amp.
  250. Suitable Transformers

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