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  1. Bay Area DIY is Cancelled Because....
  2. Is constant filament current better way to build amps?
  3. Next amp build - Trainwreck - Princeton - Deluxe ???
  4. Quicksilver M135 Output Transformers Color Code?
  5. Dynaco ST70 clone, tubes substitution question
  6. caddocks mk132: has anyone used them for tube projects?
  7. Current rating and tube current draw
  8. PP splitters again
  9. preamp with output trannies.
  10. Is it the 6SN7 or me?
  11. Manufacture date of 6SN7s
  12. simple 12AU7 cathode follower
  13. How's your bench, what's your favorite setup/tool ?
  14. Siemens H42 AM/FM receiver circuit diagram?
  15. 429A load lines
  16. Mu-stage on output
  17. My new project, 2 x KT88 60W amp
  18. Tube Amp Hum
  19. Modding MEIXING MC 3008
  20. Will this work for an EL84 push pull?
  21. "Integrated" or "stand alone"
  22. Heater to cathode voltage limits in cascodes???
  23. some Japanese can help me? (OPT trafo winding)
  24. Quicksilver 8417 a class C amp?
  25. Newcomer, where to start?
  26. Benefits of Potted Output Transformers
  27. Transformer question
  28. 6AW6A, Unloaded
  29. Aikido PSU help
  30. Plate to Cathode Cap -- what's this??
  31. Need Help Understanding/Optimising a Schematic
  32. Simple basic question quick
  33. problem on thorens PR15 (strange filaments circuity)
  34. My 1W 5687 SE Direct Coupled Power Amp
  35. VT-25 linestage + step-down trafo
  36. What to do with 803's
  37. Newbie: KT88 amp info needed
  38. 805 tube amp, uProcessor controlled
  39. Class A Tube BJT Hybrid
  40. John Broskie's enhanced T8
  41. Audio Research SP6 E
  42. Andr Charlin anybody got his Tube Amp
  43. Info needed - Shuguang SG120-C Integrated Amp
  44. Help with 6SN7 preamp
  45. 12b4 vs. aikido linestage
  46. KT88/6550 as Triode
  47. 6AU6WA triode connected as a line amp?
  48. A few basic noobie questions.
  49. Which connector for PSU/chassis B+ supply?
  50. Quad II-Forty schematic ?:
  51. Audio Research Manuals
  52. I was thinking
  53. Is this OK for the Etude Preamp?
  54. gary pimm's latest self-biasing CCS circuit
  55. 46 tube pre
  56. BEZ T9B Intermittent problem
  57. Heathkit W-5M rebuild
  58. Masco MA25N repair
  59. Sunday's Project
  60. 5881- 6l6
  61. Gas-Rectifier power supply
  62. How to get more juice out of this shunt regulator
  63. Resistors on DHT Cathode
  64. Noise floor rise on heathkit W4-AMs when power supply transformers were swapped
  65. Help me finish up this SET project (multiple questions / ramblings)
  66. This Is Cool !!
  67. output bias servo
  68. Looking for dual power triodes.
  69. Need advice selecting a 2A3 design
  70. Feedback basics
  71. tubalizer..
  72. The 6b4g
  73. 6N6P Operating Points
  74. Lundahl+EL84 PP+concertina+input stage
  75. Looking for circuit of SE amp. for Eimac 100TH
  76. Counterpoint Sa-3000 Circuit Diagram
  77. compressor Faiirchild 670 DIY
  78. How much headroom for a choke---to stop it from humming?
  79. Bay Area Diy Festival
  80. Using Eagle for Tubes designs
  81. Worst that could happen?
  82. Identifying output tx.
  83. Small pre
  84. Cathode follower driver
  85. comment on this B+ supply
  86. ODD TUBES, what to look for?
  87. 2A3 SE and Edcorp tranny
  88. Differential amplifier with 12AX7
  89. Bogen Challenger CH30 Amplifier
  90. do I need to use a heatsink on a DN2540 in a B+ supply?
  91. Transformer, 10K 1:1 - which one?
  92. Passive Pre-Amp causes huge power loss?
  93. Rubbish fluorescent tubes: Eterna Lighting (UK), GE (US)
  94. Melos TM90 ST schematic?
  95. My first tube preamplifier:)
  96. Opinions on the Conrad Johnson MV75 amplifier please.
  97. Favorite Tubes
  98. SS replacement for 83 tube ?
  99. AMC CVT 2030 Output Transformer.
  100. 6-ohm speaker to tube amp
  101. What tubes share the pinout with the 5687?
  102. SMPS for B+ discussion
  103. SS No R No C Power Supply for Tubes
  104. Hot running regulated dc filament supply for aikido preamp
  105. B+ TX. overkill?
  106. 33 Power Pentode Design Pointers Needed
  107. What Wiki?
  108. help understanding updated DRD from J Elliano's site (using 6AN4 instead of 6n1p)
  109. Zen SE84TS
  110. 5687 tube
  111. Tube vs. Semiconducter rectification
  112. Bogen CHB35 Mods and Preamp ideas
  113. I Want To Build A 100+Watt per/channel Tube Poweramp
  114. Phonodude problem
  115. enjoythemusic's t-rex amp: where is the +70VDC tap?
  116. Earthing and how it effects sound.
  117. 6D22S Getter Question
  118. Repair of a McIntosh MC225 power amp
  119. OPA627 with tube buffer....
  120. Bell Stereophonic 3030 help
  121. Choosing the line stage preamp.
  122. I Need Help, Mcintosh/Marantz 7 content
  123. For 45 > 845: selecting an 9.5/ 10 Interstage
  124. How to reduce gain of this Tube Preamplifier ?
  125. looking for pp amp schematic without nfb
  126. Pseudo dual mono PS?
  127. WE404A drive 6L6 solution
  128. Looking for info on loudness control
  129. Tubes and minority carriers
  130. suggestions for 3 projects please
  131. DIY tube preamp kit
  132. M6 lamination: what is it?
  133. why is it that most tube projects uses copper sheetmetal?
  134. Sources in the Philippines / Manila
  135. Tube noise - Help
  136. Tiny tube amp
  137. DC heating directly heated output valves
  138. Alps 250k in a Pas-3 Question
  139. 1st cap heats up...
  140. RCA VR Tube engineering data
  141. dropping heater voltage
  142. Please Help with Sound Valves M40 Monoblock Bias Adjustment Procedure!!!
  143. Old Sony SE OPT's /w 600r tap... cathode feedback maybe?
  144. Which is the poor man 45 tube?
  145. Audio Note Low Gain Quest Power Amplifier
  146. Quad II: Which resistors?
  147. Designing a preamp with two tubes
  148. ARC Classic 30 problem
  149. Why does the 6AS7 have such high Miller capacitance ?
  150. serching 5A6 beam power pentode data/curves/schematics for AF practice amp
  151. DHT Topology Comparison Question
  152. Secondary Tap of Power Transformer?
  153. Soft-clipping Circuit/tubecad
  154. lack of bass in a 6h30 design
  155. Difference between two novals
  156. C3g
  157. All Tube Stereo power amplifier
  158. what gas VR tube?
  159. KT88 schematic
  160. Help me understand the topologies here...
  161. Finished my Amp, Need to build a PS
  162. Push-Pull driver stage?
  163. Floating the heaters
  164. Replacing Power Transformer
  165. When car audio & tubes collide...
  166. 6N6P and 6SN7 Operating point suggestions
  167. NOS pF capacitors voltage rating?
  168. Tubes in Vietnam
  169. Passive pre order?
  170. layout help
  171. junkbox amp help
  172. required specs of an input step up transformer, into a 45, to allow it drive an 845
  173. 6as7 SRPP output stage
  174. OTL's and aircraft transformers
  175. PSE EL34 - valve rectification question
  176. A 2a3 Amplifier
  177. James Transformer BS
  178. Plate Voltage on 12ax7a
  179. Parallel Triodes and Load Lines
  180. Steve Bench OTL
  181. High power P-P EL34/6550/KT88 amp suggestions
  182. Stepped attenuators - break before make?
  183. audionote 144 OPT comment pls...
  184. KT88 and Hammond Transformer Schematics
  185. How do I know that my measured AC voltage is precise?
  186. 6C33B-C push pull with output transformer
  187. EL84 grid voltage?
  188. Mysterious tektronix power supply
  189. tube amp subwoofer hum problem
  190. 4654/4699 pentodes
  191. vacuum tube logic gate
  192. Screen current
  193. Any tube-sleuths out there know who made these Daystrom tubes?
  194. With this meter reading, enough to know Fuse is the culprit?
  195. need comments on amp design
  196. KEF/Celestion speakers for tube use...
  197. Another cheap fix - MOT as plate choke.
  198. XAM Mark II B
  199. Audio innovation L1 valve replacement
  200. TETRODE amplifiers
  201. Audio Shop Eifl Corporation
  202. 6sn7 Buffer
  203. Marantz 8b operating voltages
  204. amplifier with 813 valves
  205. Changing plate resistor in live circuitry.
  206. 2xEL34 vs. 4xEL84 vs. 2x6L6 vs. 4x6V6
  207. KT88 drivers
  208. Simple Hybrid SE EL84 UL amp.. comments please.
  209. max input impedance for // el84's and other ?
  210. Please Help.. PCL81
  211. Some troubles with PSUD. A little help please !
  212. Why D getters?
  213. Help me information of the tubes?
  214. Questions about this line stage
  215. Need help from Aikido builder
  216. Aikesi_el34҇һ̨
  217. Direct heating triodes are really better?
  218. Audio Reality is back, in digital format
  219. Stoetkit 25W integrated amp
  220. Tube Pre Amplifier for SEWA 7 Watt ClassA MOSFET
  221. Michaelson Audio Odysseus Problem.
  222. anyone living in australia (hopefully adelaide) willing to lend their puncher/bit?
  223. ReinoutdV
  224. Priboj amp schematic
  225. EL84 in ultra-linear mode
  226. internal shielding
  227. RIAA: what does it stand for?
  228. heathkit sa2 - new question
  229. RCA R35, 39 & 57 Terminal Usage...
  230. 45 into an 845 parafeed circuit
  231. Tubes power supply 220 t0 300V ?
  232. ripple values in B+ supply
  233. Capacitors and tubes for AA5?
  234. Dynaco PAS Rebuild
  235. Audio Research SP9 Circuit Diagram HELP!
  236. ARC reference II schematic
  237. 71a Line Stage and Miller Capacitance
  238. Low plate voltage pentode (<40v) for diff pair?
  239. loadlines for newbie.
  240. Measuring approx RMS power O/P
  241. Hybrid Aikido-ish gain stage
  242. Loftin-White coupling Questions
  243. 807 screen regulation
  244. What kills an opt tranny?
  245. EAR529 schematic diagram
  246. World Designs KEL84 Valve Amplifier
  247. what 300B design would you recommend but...
  248. My RIAA Phono Stage Project
  249. A2 Questions
  250. World Audio Design

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