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  1. Choke input PSU, drawbacks?
  2. Heater PS alternative / Redux
  3. Gold or silver dress-up rings for tube amps.
  4. 50C5 conversion
  5. Sa-5.1 blow fuse
  6. Hum problem of preamp
  7. Chassis ground blows fuse
  8. 7193 (2c22) preamp buzz/hum
  9. Se Opt
  10. Does anhone use those switching power supply for the heaters?
  11. Tube Minidoc, featuring New York Noise
  12. Help Choosing A Sowter Trans For My DAC?
  13. fisher 800c clipping at ultra low volume
  14. "audiodigit" tubalizer & tubepre original schematic
  15. F704
  16. tube socket PCB library or dimensions
  17. motorboating
  18. 6AN8 Triode connection + EL 84 PP
  19. Please help amend 6AS7PP circuit
  20. El84 Pp
  21. 6V6 Ultralinear
  22. Dear Moderators
  23. 845 se
  24. Bell 2122-B integrated amp - tube suggestions
  25. Wirewound pot for Rk
  26. KT88/90 F2011 Schematic
  27. United Electric 967
  28. Scott 222c mods...?
  29. Switching supply for 300B filaments
  30. ECF80/6BL8
  31. 24v tube buffer & line stage schematic
  32. Vintage gear hunting
  33. Seperate PSU Transformers? Filament Supplys?
  34. 828 is better
  35. Hum on a choke loaded stage
  36. SE Transformer question
  37. Design question - How to make amp porn visible?
  38. Leak Stereo 20 - Johan's Square Wave Theory
  39. K-12G First Time Build
  40. Vishay vt52-55 resistors in a tube amp
  41. EL84 Push-Pull ccs bias
  42. Eight 807's in Push Pull?
  43. Working with Current O/P DAC Chips
  44. Unison research Preludio schematic
  45. Rewinding Power transformer
  46. Information needed on RCA SPECIAL RED TUBES
  47. Score?
  48. Herron phono
  49. tube preamp + SS power amp.
  50. Puzzler
  51. HI-Fi 6p13p
  52. Resistor values
  53. To chassies SE amp,PSU question
  54. Grounding & board Layout questions
  55. Look for a beefy driver tube.
  56. ECC81
  57. 5687 v.s. 6922 preamp/xover
  58. amorphous iron core good or not
  59. Pre-Amp
  60. submini tube preamp is a success
  61. Roll off frequency.
  62. Materials Technology for Electron Tubes by Walter H. Kohl
  63. Grundig TK 46 manual
  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. VacuTrace ... In Chicago?
  74. Lifesaver question on earthing
  75. Affordable, but good attenuators?
  76. Gu50 Set ?
  77. mounting an EL34 upside-down
  78. Direct coupled PP 2a3 amp - maths needed!!
  79. My 1st scratch build complete......
  80. Very Basic EL84 or EL34 DIY Amp
  81. Curcio Daniel Preamp Mods?
  82. Tube designs: 45 driving 45/2a3/300b?
  83. Adding secondary of output transformer into cathodes of output stage ? Eico ST-70
  84. Marantz 8 B : Output Transformer
  85. has anyone used a fan on their project?
  86. Audio Research SP12 heater arrangement
  87. tv damper diodes
  88. volume pot quite close to a tube - is this okay?
  89. UTC s42 special series
  90. 6H30P preamp schematics
  91. Digital potentiometer corrupt tube amps
  92. Alternative filament supply for 01A line stage
  93. Lamination Size
  94. Yaqin MC10L and KT88
  95. Help me read tube data sheets
  96. Quick Question (Driving 6L6GC's)
  97. Cause for concern -- scorch mark in tube
  98. why not 10k pot
  99. Dynaco Stereo 70 Output Transformer
  100. 6CJ3 rectifier or 6D22S rectifier
  101. Back-to-Back trannies
  102. Hamfest in Toronto area next weekend
  103. st70 bass response
  104. Triode "Champ" transformer v Edcor
  105. Low vs High aka Series vs Parallel Filaments
  106. Bogen monster MO200A schematic
  107. The Great Tempe Audio Shootout
  108. opinions on this p-p kt88
  109. Any XLR Tube Buffer Plans?
  110. Mystery transformers
  111. I need help with my next project
  112. A thought on Cathode feedback
  113. EL34 SE, direct coupled
  114. Ccs
  115. Hybrid amp: ECH83 + TDA2030A
  116. Leaving tube preamp always powered on.
  117. Variable 6922 heater to cathode voltage limit...?
  118. Is this risky?
  119. What to do with some WE tubes and others
  120. 6B4G SRPP
  121. pentode in triode mode SE vs a DHT SE like 2a3/300b
  122. dynakit decware bottlehead ... which to pick
  123. 6JC6 triode strapped?
  124. Searching for Raw Turrets
  125. Help.. EZ81 power supply diagram
  126. Ear 8l6
  127. Voltage measurements from a blown 5AR4 vs. good 5Y3
  128. Sanity check on a 2A3 ultrapath with Pentode driver
  129. Star ground with dissimilar metals: concern?
  130. 5AR4 marked as 5V4GA?
  131. Calculating cathode bypass cap.
  132. Please need help! TUBE BIAS PROBE
  133. Aikido Phono Stage
  134. Using an El84 as a driver
  135. Transfromer value of this 300B circuit
  136. Chassis Layout & PS questions
  137. help needed for 1st DIY tube amp - Sakuma 845 SE
  138. Ideas for 4v filament triodes/pentodes
  139. Comments on Power Amp Viability
  140. Balanced active crossover advice
  141. The Tube Center
  142. Help1 with a 3 channel 2a3 amplifier
  143. volume control hum/noise
  144. PS choke magnetic induction
  145. Circlotron power supply question
  146. Autoformer as choke?
  147. E182CC
  148. Grundig Fine Arts OTL Amplifier
  149. Damper diodes, 6ax4 and or 6w4?
  150. Knight 333 / Pioneer SX 34B info needed.
  151. Gargantuan Linestage Output Capacitors
  152. Quad II Restoration
  153. Help identifying a tube.
  154. Tube filaments in series?
  155. Design of Resonant Input Choke PSU
  156. Dissimilar triode
  157. How important is the quality of a triode used as a cathode follower
  158. EL34B tubes
  159. Why not so common to split dual triodes between channels?
  160. In search of power supply schematic for phono preamp
  161. General Electric vs Toshiba 6L6's
  162. Audio Research Dual 75 Capacitor Source?
  163. Choosing A Cathode bypass capacitor
  164. 12AU7 SRPP buffer suggestions
  165. Pentode/triode switch question
  166. Lundahll 1669A Secondary voltage???
  167. Substituting tube rectifiers by silicon
  168. newbie question: is the connection to the output xformer somewhat odd?
  169. All quiet on the SN front - about darned time!
  170. Estimating power output
  171. Looking for KT88 Amplifier Schematic by Mikael Abdellah
  172. Comments on passive pre and cables
  173. curvecaptor
  174. 6b4g pushpull build!newbie
  175. Need help; I have "dog leg" shaped waveform on my amp
  176. Output Transformer Question?
  177. Urgent OT HELP needed ASAP please
  178. Questions on Triode Strapping
  179. Morgan Jones BALANCED?
  180. What are your RFI precautions?
  181. Pentodes without cathodes?
  182. help me
  183. Good quality 6600 CT OT
  184. Local Hamfest score!!!
  185. Unknown Transformer
  186. S5 11g help
  187. 6SN7 pre-amp
  188. These tube can be use for amplifier
  189. Any pitfalls to choke derived CT?
  190. Audio Research D76A bias adjustment
  191. I meet Mr. Morgan Jones
  192. st70 electrolytic caps
  193. Thank you SY
  194. el84 1 channel stopped working help
  195. Help! Weak Bass!
  196. never say never - 300B amps...
  197. 6aq5 Screen resistor?
  198. L. Tatro farm radios from 1930's.
  199. Published/DIY ultra-low THD designs?
  200. EL84 SE auto bias
  201. Kofi Annan in: "Oscillatin' in the Bevois Valley'"
  202. Subwoofer connections
  203. 6/30L2 - What to do with them ?
  204. PIONEER SA-810 Tube Amp Schematics
  205. EF86 Gm
  206. EL84/6BQ5 Ultra-Linear Push-Pull Recomendation
  207. Aria 6P14 makeover.
  208. switch for paralelled tube
  209. Curvecaptor with pentodes??
  210. Ground point for HF decoupling cap?
  211. Cancelling Harmonics
  212. Quiet Tube
  213. LM385 Adjustable voltage ref. diode as LED bias?
  214. Tubed Expression Pedal
  215. Any spice models around for AA5-esque battery tubes?
  216. Where to connect shielding
  217. Help 805 As that the friend makes to straighten even gallbladder machine
  218. studiogear of the beatles
  219. 6AK5 Triode Curves
  220. twisted pair signal, source selector and ground buss???
  221. Tiny Amplifiers
  222. A newly aquired Hum
  223. many jan tubes
  224. is this the correct way of adding a volume control?
  225. Basic DIY Valve Phono Stage
  226. 5879 Experience?
  227. personal jobs
  228. Wanted Triode strapped curves for pentode of ECL82.
  229. source selector / volume hum in Aikido
  230. DHTs and Cathode Bias
  231. Best SET driver stage with lots of B+?
  232. Tube Library Pspice error
  233. referencing DC heater to B+
  234. Double floating Circlotron
  235. Supply Capacitors ?
  236. Sakuma style Tango project
  237. MC10L is good or not
  238. Eico HF-20 & Claus Byrith PS voltage & power draw
  239. Voltage Regulator Tubes
  240. EL34 triode-connected grounding-grid curves?
  241. Pls help me understand AR SP6 circuit
  242. I'm looking for 417a/5842 Preamp Schematic without any Transformer, any suggestion ?
  243. Trouble in a new DIY amp.
  244. Suitable Transformers
  245. PT winding calculations HELP
  246. How to measure frequency response with a PC?
  247. Pspice Tube Generation Software
  248. Tektron tube amplifier Italy made
  249. What to do with 2x Stancor A3830?
  250. REQ: Schematics and tweaking tips

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