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  1. Ra-a??
  2. Help with my el509 amp almost done but with one problem.
  3. McIntosh chassis help needed
  4. Tube Voltage Regulator Design
  5. DC Tube Amplifiers
  6. Coupling cap voltage rating
  7. Anyone experienced in the 76 tube?
  8. aikido thump
  9. bypassing preamp board in integrated amp
  10. Mallory FP 2x30/500 for Scott LX-72 - NOOB
  11. is it really required to use carbon comp for grid stoppers?
  12. How much trickle current can fixed bias cathode batteries stand?
  13. LM329 as voltage reference in a CCS.
  14. Euridice Preamp with 5842 and LL1660
  15. Trans. alignments
  16. Audio Note M3 Kit modification
  17. Has anyone simulated an "Aikido" amplifier?
  18. 6N1 Chinese tube and others
  19. 12AT7 Linestage design
  20. ECF80 instead of 7199
  21. 6922 vs 6SN7
  22. Transformer DCR's
  23. ferrite beads v. grid resistor
  24. What went wrong with my amp? Bass driver strange movement.
  25. Toccata Phono Preamp
  26. Drawbacks of Parafeed?
  27. aikido problem
  28. RS253 giant SE monoblock (Chinese)
  29. Plate chokes & Power chokes
  30. best amp for rock n roll
  31. quick question about tube relays
  32. Yeo's Simple EL84 with a twist
  33. ST-70 OPT, A-470 question
  34. meixing 805 tube amp problems
  35. Advice for NOOBie - Dad's Scott LK-72
  36. KT66 SE amp, grid current or not?
  37. How do I achieve more output power?
  38. Driver stage load resistor
  39. More Edcor XSM10K/10K Specs
  40. DC filament
  41. driver stages
  42. Bay Area DIY is Cancelled Because....
  43. Is constant filament current better way to build amps?
  44. Next amp build - Trainwreck - Princeton - Deluxe ???
  45. Quicksilver M135 Output Transformers Color Code?
  46. Dynaco ST70 clone, tubes substitution question
  47. caddocks mk132: has anyone used them for tube projects?
  48. Current rating and tube current draw
  49. PP splitters again
  50. preamp with output trannies.
  51. Is it the 6SN7 or me?
  52. Manufacture date of 6SN7s
  53. simple 12AU7 cathode follower
  54. How's your bench, what's your favorite setup/tool ?
  55. Siemens H42 AM/FM receiver circuit diagram?
  56. 429A load lines
  57. Mu-stage on output
  58. My new project, 2 x KT88 60W amp
  59. Tube Amp Hum
  60. Modding MEIXING MC 3008
  61. Will this work for an EL84 push pull?
  62. "Integrated" or "stand alone"
  63. Heater to cathode voltage limits in cascodes???
  64. some Japanese can help me? (OPT trafo winding)
  65. Quicksilver 8417 a class C amp?
  66. Newcomer, where to start?
  67. Benefits of Potted Output Transformers
  68. Transformer question
  69. 6AW6A, Unloaded
  70. Aikido PSU help
  71. Plate to Cathode Cap -- what's this??
  72. Need Help Understanding/Optimising a Schematic
  73. Simple basic question quick
  74. problem on thorens PR15 (strange filaments circuity)
  75. My 1W 5687 SE Direct Coupled Power Amp
  76. VT-25 linestage + step-down trafo
  77. What to do with 803's
  78. Newbie: KT88 amp info needed
  79. 805 tube amp, uProcessor controlled
  80. Class A Tube BJT Hybrid
  81. John Broskie's enhanced T8
  82. Audio Research SP6 E
  83. André Charlin anybody got his Tube Amp
  84. Info needed - Shuguang SG120-C Integrated Amp
  85. Help with 6SN7 preamp
  86. 12b4 vs. aikido linestage
  87. KT88/6550 as Triode
  88. 6AU6WA triode connected as a line amp?
  89. A few basic noobie questions.
  90. Which connector for PSU/chassis B+ supply?
  91. Quad II-Forty schematic ?:
  92. Audio Research Manuals
  93. I was thinking
  94. Is this OK for the Etude Preamp?
  95. gary pimm's latest self-biasing CCS circuit
  96. 46 tube pre
  97. BEZ T9B Intermittent problem
  98. Heathkit W-5M rebuild
  99. Masco MA25N repair
  100. Sunday's Project
  101. 5881- 6l6
  102. Gas-Rectifier power supply
  103. How to get more juice out of this shunt regulator
  104. Resistors on DHT Cathode
  105. Noise floor rise on heathkit W4-AMs when power supply transformers were swapped
  106. Help me finish up this SET project (multiple questions / ramblings)
  107. This Is Cool !!
  108. output bias servo
  109. Looking for dual power triodes.
  110. Need advice selecting a 2A3 design
  111. Feedback basics
  112. tubalizer..
  113. The 6b4g
  114. 6N6P Operating Points
  115. Lundahl+EL84 PP+concertina+input stage
  116. Looking for circuit of SE amp. for Eimac 100TH
  117. Counterpoint Sa-3000 Circuit Diagram
  118. compressor Faiirchild 670 DIY
  119. How much headroom for a choke---to stop it from humming?
  120. Bay Area Diy Festival
  121. Using Eagle for Tubes designs
  122. Worst that could happen?
  123. Identifying output tx.
  124. Small pre
  125. Cathode follower driver
  126. comment on this B+ supply
  127. ODD TUBES, what to look for?
  128. 2A3 SE and Edcorp tranny
  129. Differential amplifier with 12AX7
  130. Bogen Challenger CH30 Amplifier
  131. do I need to use a heatsink on a DN2540 in a B+ supply?
  132. Transformer, 10K 1:1 - which one?
  133. Passive Pre-Amp causes huge power loss?
  134. Rubbish fluorescent tubes: Eterna Lighting (UK), GE (US)
  135. Melos TM90 ST schematic?
  136. My first tube preamplifier:)
  137. Opinions on the Conrad Johnson MV75 amplifier please.
  138. Favorite Tubes
  139. SS replacement for 83 tube ?
  140. AMC CVT 2030 Output Transformer.
  141. 6-ohm speaker to tube amp
  142. What tubes share the pinout with the 5687?
  143. SMPS for B+ discussion
  144. SS No R No C Power Supply for Tubes
  145. Hot running regulated dc filament supply for aikido preamp
  146. B+ TX. overkill?
  147. 33 Power Pentode Design Pointers Needed
  148. What Wiki?
  149. help understanding updated DRD from J Elliano's site (using 6AN4 instead of 6n1p)
  150. Zen SE84TS
  151. 5687 tube
  152. Tube vs. Semiconducter rectification
  153. Bogen CHB35 Mods and Preamp ideas
  154. I Want To Build A 100+Watt per/channel Tube Poweramp
  155. Phonodude problem
  156. enjoythemusic's t-rex amp: where is the +70VDC tap?
  157. Earthing and how it effects sound.
  158. 6D22S Getter Question
  159. Repair of a McIntosh MC225 power amp
  160. OPA627 with tube buffer....
  161. Bell Stereophonic 3030 help
  162. Choosing the line stage preamp.
  163. I Need Help, Mcintosh/Marantz 7 content
  164. For 45 > 845: selecting an 9.5/ 10 Interstage
  165. How to reduce gain of this Tube Preamplifier ?
  166. looking for pp amp schematic without nfb
  167. Pseudo dual mono PS?
  168. WE404A drive 6L6 solution
  169. Looking for info on loudness control
  170. Tubes and minority carriers
  171. suggestions for 3 projects please
  172. DIY tube preamp kit
  173. M6 lamination: what is it?
  174. why is it that most tube projects uses copper sheetmetal?
  175. Sources in the Philippines / Manila
  176. Tube noise - Help
  177. Tiny tube amp
  178. DC heating directly heated output valves
  179. Alps 250k in a Pas-3 Question
  180. 1st cap heats up...
  181. RCA VR Tube engineering data
  182. dropping heater voltage
  183. Please Help with Sound Valves M40 Monoblock Bias Adjustment Procedure!!!
  184. Old Sony SE OPT's /w 600r tap... cathode feedback maybe?
  185. Which is the poor man 45 tube?
  186. Audio Note Low Gain Quest Power Amplifier
  187. Quad II: Which resistors?
  188. Designing a preamp with two tubes
  189. ARC Classic 30 problem
  190. Why does the 6AS7 have such high Miller capacitance ?
  191. serching 5A6 beam power pentode data/curves/schematics for AF practice amp
  192. DHT Topology Comparison Question
  193. Secondary Tap of Power Transformer?
  194. Soft-clipping Circuit/tubecad
  195. lack of bass in a 6h30 design
  196. Difference between two novals
  197. C3g
  198. All Tube Stereo power amplifier
  199. what gas VR tube?
  200. KT88 schematic
  201. Help me understand the topologies here...
  202. Finished my Amp, Need to build a PS
  203. Push-Pull driver stage?
  204. Floating the heaters
  205. Replacing Power Transformer
  206. When car audio & tubes collide...
  207. 6N6P and 6SN7 Operating point suggestions
  208. NOS pF capacitors voltage rating?
  209. Tubes in Vietnam
  210. Passive pre order?
  211. layout help
  212. junkbox amp help
  213. required specs of an input step up transformer, into a 45, to allow it drive an 845
  214. 6as7 SRPP output stage
  215. OTL's and aircraft transformers
  216. PSE EL34 - valve rectification question
  217. A 2a3 Amplifier
  218. James Transformer BS
  219. Plate Voltage on 12ax7a
  220. Parallel Triodes and Load Lines
  221. Steve Bench OTL
  222. High power P-P EL34/6550/KT88 amp suggestions
  223. Stepped attenuators - break before make?
  224. audionote 144 OPT comment pls...
  225. KT88 and Hammond Transformer Schematics
  226. How do I know that my measured AC voltage is precise?
  227. 6C33B-C push pull with output transformer
  228. EL84 grid voltage?
  229. Mysterious tektronix power supply
  230. tube amp subwoofer hum problem
  231. 4654/4699 pentodes
  232. vacuum tube logic gate
  233. Screen current
  234. Any tube-sleuths out there know who made these Daystrom tubes?
  235. With this meter reading, enough to know Fuse is the culprit?
  236. need comments on amp design
  237. KEF/Celestion speakers for tube use...
  238. Another cheap fix - MOT as plate choke.
  239. XAM Mark II B
  240. Audio innovation L1 valve replacement
  241. TETRODE amplifiers
  242. Audio Shop Eifl Corporation
  243. 6sn7 Buffer
  244. Marantz 8b operating voltages
  245. amplifier with 813 valves
  246. Changing plate resistor in live circuitry.
  247. 2xEL34 vs. 4xEL84 vs. 2x6L6 vs. 4x6V6
  248. KT88 drivers
  249. Simple Hybrid SE EL84 UL amp.. comments please.
  250. max input impedance for // el84's and other ?

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