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  1. Trans. alignments
  2. Audio Note M3 Kit modification
  3. Has anyone simulated an "Aikido" amplifier?
  4. 6N1 Chinese tube and others
  5. 12AT7 Linestage design
  6. ECF80 instead of 7199
  7. Modifying a tube tester into a curve tracer (oscilloscope X/Y outputs) ?
  8. 6922 vs 6SN7
  9. Transformer DCR's
  10. ferrite beads v. grid resistor
  11. What went wrong with my amp? Bass driver strange movement.
  12. Toccata Phono Preamp
  13. Drawbacks of Parafeed?
  14. aikido problem
  15. RS253 giant SE monoblock (Chinese)
  16. Plate chokes & Power chokes
  17. best amp for rock n roll
  18. quick question about tube relays
  19. Yeo's Simple EL84 with a twist
  20. ST-70 OPT, A-470 question
  21. meixing 805 tube amp problems
  22. Advice for NOOBie - Dad's Scott LK-72
  23. KT66 SE amp, grid current or not?
  24. How do I achieve more output power?
  25. Driver stage load resistor
  26. More Edcor XSM10K/10K Specs
  27. DC filament
  28. driver stages
  29. Bay Area DIY is Cancelled Because....
  30. Is constant filament current better way to build amps?
  31. Next amp build - Trainwreck - Princeton - Deluxe ???
  32. Quicksilver M135 Output Transformers Color Code?
  33. Dynaco ST70 clone, tubes substitution question
  34. caddocks mk132: has anyone used them for tube projects?
  35. Current rating and tube current draw
  36. PP splitters again
  37. preamp with output trannies.
  38. Is it the 6SN7 or me?
  39. Manufacture date of 6SN7s
  40. simple 12AU7 cathode follower
  41. How's your bench, what's your favorite setup/tool ?
  42. Siemens H42 AM/FM receiver circuit diagram?
  43. 429A load lines
  44. Mu-stage on output
  45. My new project, 2 x KT88 60W amp
  46. Tube Amp Hum
  47. Modding MEIXING MC 3008
  48. Will this work for an EL84 push pull?
  49. "Integrated" or "stand alone"
  50. Heater to cathode voltage limits in cascodes???
  51. some Japanese can help me? (OPT trafo winding)
  52. Quicksilver 8417 a class C amp?
  53. Newcomer, where to start?
  54. Benefits of Potted Output Transformers
  55. Transformer question
  56. 6AW6A, Unloaded
  57. Aikido PSU help
  58. Plate to Cathode Cap -- what's this??
  59. Need Help Understanding/Optimising a Schematic
  60. Simple basic question quick
  61. problem on thorens PR15 (strange filaments circuity)
  62. My 1W 5687 SE Direct Coupled Power Amp
  63. VT-25 linestage + step-down trafo
  64. What to do with 803's
  65. Newbie: KT88 amp info needed
  66. 805 tube amp, uProcessor controlled
  67. Class A Tube BJT Hybrid
  68. John Broskie's enhanced T8
  69. Audio Research SP6 E
  70. Andr Charlin anybody got his Tube Amp
  71. Info needed - Shuguang SG120-C Integrated Amp
  72. Help with 6SN7 preamp
  73. 12b4 vs. aikido linestage
  74. KT88/6550 as Triode
  75. 6AU6WA triode connected as a line amp?
  76. A few basic noobie questions.
  77. Which connector for PSU/chassis B+ supply?
  78. Quad II-Forty schematic ?:
  79. Audio Research Manuals
  80. I was thinking
  81. Is this OK for the Etude Preamp?
  82. gary pimm's latest self-biasing CCS circuit
  83. 46 tube pre
  84. BEZ T9B Intermittent problem
  85. Heathkit W-5M rebuild
  86. Masco MA25N repair
  87. Sunday's Project
  88. 5881- 6l6
  89. Gas-Rectifier power supply
  90. How to get more juice out of this shunt regulator
  91. Resistors on DHT Cathode
  92. Noise floor rise on heathkit W4-AMs when power supply transformers were swapped
  93. Help me finish up this SET project (multiple questions / ramblings)
  94. This Is Cool !!
  95. output bias servo
  96. Looking for dual power triodes.
  97. Need advice selecting a 2A3 design
  98. Feedback basics
  99. tubalizer..
  100. The 6b4g
  101. 6N6P Operating Points
  102. Lundahl+EL84 PP+concertina+input stage
  103. Looking for circuit of SE amp. for Eimac 100TH
  104. Counterpoint Sa-3000 Circuit Diagram
  105. compressor Faiirchild 670 DIY
  106. How much headroom for a choke---to stop it from humming?
  107. Bay Area Diy Festival
  108. Using Eagle for Tubes designs
  109. Worst that could happen?
  110. Identifying output tx.
  111. Small pre
  112. Cathode follower driver
  113. comment on this B+ supply
  114. ODD TUBES, what to look for?
  115. 2A3 SE and Edcorp tranny
  116. Differential amplifier with 12AX7
  117. Bogen Challenger CH30 Amplifier
  118. do I need to use a heatsink on a DN2540 in a B+ supply?
  119. Transformer, 10K 1:1 - which one?
  120. Passive Pre-Amp causes huge power loss?
  121. Rubbish fluorescent tubes: Eterna Lighting (UK), GE (US)
  122. Melos TM90 ST schematic?
  123. My first tube preamplifier:)
  124. Opinions on the Conrad Johnson MV75 amplifier please.
  125. Favorite Tubes
  126. SS replacement for 83 tube ?
  127. AMC CVT 2030 Output Transformer.
  128. 6-ohm speaker to tube amp
  129. What tubes share the pinout with the 5687?
  130. SMPS for B+ discussion
  131. SS No R No C Power Supply for Tubes
  132. Hot running regulated dc filament supply for aikido preamp
  133. B+ TX. overkill?
  134. 33 Power Pentode Design Pointers Needed
  135. What Wiki?
  136. help understanding updated DRD from J Elliano's site (using 6AN4 instead of 6n1p)
  137. Zen SE84TS
  138. 5687 tube
  139. Tube vs. Semiconducter rectification
  140. Bogen CHB35 Mods and Preamp ideas
  141. I Want To Build A 100+Watt per/channel Tube Poweramp
  142. Phonodude problem
  143. enjoythemusic's t-rex amp: where is the +70VDC tap?
  144. Earthing and how it effects sound.
  145. 6D22S Getter Question
  146. Repair of a McIntosh MC225 power amp
  147. OPA627 with tube buffer....
  148. Bell Stereophonic 3030 help
  149. Choosing the line stage preamp.
  150. I Need Help, Mcintosh/Marantz 7 content
  151. For 45 > 845: selecting an 9.5/ 10 Interstage
  152. How to reduce gain of this Tube Preamplifier ?
  153. looking for pp amp schematic without nfb
  154. Pseudo dual mono PS?
  155. WE404A drive 6L6 solution
  156. Looking for info on loudness control
  157. Tubes and minority carriers
  158. suggestions for 3 projects please
  159. DIY tube preamp kit
  160. M6 lamination: what is it?
  161. why is it that most tube projects uses copper sheetmetal?
  162. Sources in the Philippines / Manila
  163. Tube noise - Help
  164. Tiny tube amp
  165. DC heating directly heated output valves
  166. Alps 250k in a Pas-3 Question
  167. 1st cap heats up...
  168. RCA VR Tube engineering data
  169. dropping heater voltage
  170. Please Help with Sound Valves M40 Monoblock Bias Adjustment Procedure!!!
  171. Old Sony SE OPT's /w 600r tap... cathode feedback maybe?
  172. Which is the poor man 45 tube?
  173. Audio Note Low Gain Quest Power Amplifier
  174. Quad II: Which resistors?
  175. Designing a preamp with two tubes
  176. ARC Classic 30 problem
  177. Why does the 6AS7 have such high Miller capacitance ?
  178. serching 5A6 beam power pentode data/curves/schematics for AF practice amp
  179. DHT Topology Comparison Question
  180. Secondary Tap of Power Transformer?
  181. Soft-clipping Circuit/tubecad
  182. lack of bass in a 6h30 design
  183. Difference between two novals
  184. C3g
  185. All Tube Stereo power amplifier
  186. what gas VR tube?
  187. KT88 schematic
  188. Help me understand the topologies here...
  189. Finished my Amp, Need to build a PS
  190. Push-Pull driver stage?
  191. Floating the heaters
  192. Replacing Power Transformer
  193. When car audio & tubes collide...
  194. 6N6P and 6SN7 Operating point suggestions
  195. NOS pF capacitors voltage rating?
  196. Tubes in Vietnam
  197. Passive pre order?
  198. layout help
  199. junkbox amp help
  200. required specs of an input step up transformer, into a 45, to allow it drive an 845
  201. 6as7 SRPP output stage
  202. OTL's and aircraft transformers
  203. PSE EL34 - valve rectification question
  204. A 2a3 Amplifier
  205. James Transformer BS
  206. Plate Voltage on 12ax7a
  207. Parallel Triodes and Load Lines
  208. Steve Bench OTL
  209. High power P-P EL34/6550/KT88 amp suggestions
  210. Stepped attenuators - break before make?
  211. audionote 144 OPT comment pls...
  212. KT88 and Hammond Transformer Schematics
  213. How do I know that my measured AC voltage is precise?
  214. 6C33B-C push pull with output transformer
  215. EL84 grid voltage?
  216. Mysterious tektronix power supply
  217. tube amp subwoofer hum problem
  218. 4654/4699 pentodes
  219. vacuum tube logic gate
  220. Screen current
  221. Any tube-sleuths out there know who made these Daystrom tubes?
  222. With this meter reading, enough to know Fuse is the culprit?
  223. need comments on amp design
  224. KEF/Celestion speakers for tube use...
  225. Another cheap fix - MOT as plate choke.
  226. XAM Mark II B
  227. Audio innovation L1 valve replacement
  228. TETRODE amplifiers
  229. Audio Shop Eifl Corporation
  230. 6sn7 Buffer
  231. Marantz 8b operating voltages
  232. amplifier with 813 valves
  233. Changing plate resistor in live circuitry.
  234. 2xEL34 vs. 4xEL84 vs. 2x6L6 vs. 4x6V6
  235. KT88 drivers
  236. Simple Hybrid SE EL84 UL amp.. comments please.
  237. max input impedance for // el84's and other ?
  238. Please Help.. PCL81
  239. Some troubles with PSUD. A little help please !
  240. Why D getters?
  241. Help me information of the tubes?
  242. Questions about this line stage
  243. Need help from Aikido builder
  244. Aikesi_el34҇һ̨
  245. Direct heating triodes are really better?
  246. Audio Reality is back, in digital format
  247. Stoetkit 25W integrated amp
  248. Switchable stages with Tubelabs hybrid MOSFET/ 845 SE amp?
  249. Tube Pre Amplifier for SEWA 7 Watt ClassA MOSFET
  250. Michaelson Audio Odysseus Problem.

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