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  1. is it really required to use carbon comp for grid stoppers?
  2. How much trickle current can fixed bias cathode batteries stand?
  3. Who is the administrator?
  4. LM329 as voltage reference in a CCS.
  5. Euridice Preamp with 5842 and LL1660
  6. Trans. alignments
  7. Audio Note M3 Kit modification
  8. Has anyone simulated an "Aikido" amplifier?
  9. Upgrading ST70 PS w/ SS question
  10. 6N1 Chinese tube and others
  11. 12AT7 Linestage design
  12. ECF80 instead of 7199
  13. Modifying a tube tester into a curve tracer (oscilloscope X/Y outputs) ?
  14. 6922 vs 6SN7
  15. Transformer DCR's
  16. ferrite beads v. grid resistor
  17. What went wrong with my amp? Bass driver strange movement.
  18. Toccata Phono Preamp
  19. Drawbacks of Parafeed?
  20. aikido problem
  21. RS253 giant SE monoblock (Chinese)
  22. Plate chokes & Power chokes
  23. 10uF filter cap too small? PSU schematic inside
  24. HOT ROD DELUXE: CRACKLE...POP...what to do?
  25. converting Baldwin organ amp to guitar
  26. best amp for rock n roll
  27. quick question about tube relays
  28. Yeo's Simple EL84 with a twist
  29. ST-70 OPT, A-470 question
  30. meixing 805 tube amp problems
  31. Advice for NOOBie - Dad's Scott LK-72
  32. Peavey Valve King 112
  33. KT66 SE amp, grid current or not?
  34. 269EX in a champ?
  35. How do I achieve more output power?
  36. Driver stage load resistor
  37. More Edcor XSM10K/10K Specs
  38. DC filament
  39. driver stages
  40. Bay Area DIY is Cancelled Because....
  41. Is constant filament current better way to build amps?
  42. Next amp build - Trainwreck - Princeton - Deluxe ???
  43. Quicksilver M135 Output Transformers Color Code?
  44. Dynaco ST70 clone, tubes substitution question
  45. caddocks mk132: has anyone used them for tube projects?
  46. DIY Pro Audio Recording Gear - La2a, Pultec, more.
  47. size of filtering caps SS vs OTL tube
  48. Current rating and tube current draw
  49. NUCLON -- My first hybrid guitar amp
  50. PP splitters again
  51. preamp with output trannies.
  52. Is it the 6SN7 or me?
  53. My Kind of Guitar Tuner
  54. Regulating tube amp power supply - can Iget away with a simpler CLC filtering scheme?
  55. Manufacture date of 6SN7s
  56. simple 12AU7 cathode follower
  57. How's your bench, what's your favorite setup/tool ?
  58. Siemens H42 AM/FM receiver circuit diagram?
  59. 429A load lines
  60. Mu-stage on output
  61. My new project, 2 x KT88 60W amp
  62. Tube Amp Hum
  63. Modding MEIXING MC 3008
  64. crate vc 2110 schematic ???
  65. Will this work for an EL84 push pull?
  66. "Integrated" or "stand alone"
  67. Heater to cathode voltage limits in cascodes???
  68. some Japanese can help me? (OPT trafo winding)
  69. Quicksilver 8417 a class C amp?
  70. Newcomer, where to start?
  71. Benefits of Potted Output Transformers
  72. Transformer question
  73. 6AW6A, Unloaded
  74. Aikido PSU help
  75. Rectifier that doesn't need own filament supply?
  76. Plate to Cathode Cap -- what's this??
  77. Need Help Understanding/Optimising a Schematic
  78. Simple basic question quick
  79. problem on thorens PR15 (strange filaments circuity)
  80. My 1W 5687 SE Direct Coupled Power Amp
  81. VT-25 linestage + step-down trafo
  82. What to do with 803's
  83. Newbie: KT88 amp info needed
  84. 805 tube amp, uProcessor controlled
  85. Class A Tube BJT Hybrid
  86. John Broskie's enhanced T8
  87. Audio Research SP6 E
  88. André Charlin anybody got his Tube Amp
  89. Info needed - Shuguang SG120-C Integrated Amp
  90. Help with 6SN7 preamp
  91. 12b4 vs. aikido linestage
  92. KT88/6550 as Triode
  93. 6AU6WA triode connected as a line amp?
  94. A few basic noobie questions.
  95. Which connector for PSU/chassis B+ supply?
  96. Quad II-Forty schematic ?:
  97. Audio Research Manuals
  98. I was thinking
  99. silicon or tube rectifier?
  100. Is this OK for the Etude Preamp?
  101. gary pimm's latest self-biasing CCS circuit
  102. 46 tube pre
  103. BEZ T9B Intermittent problem
  104. Heathkit W-5M rebuild
  105. Masco MA25N repair
  106. Sunday's Project
  107. 5881- 6l6
  108. Gas-Rectifier power supply
  109. How to get more juice out of this shunt regulator
  110. Resistors on DHT Cathode
  111. Noise floor rise on heathkit W4-AMs when power supply transformers were swapped
  112. Help me finish up this SET project (multiple questions / ramblings)
  113. This Is Cool !!
  114. output bias servo
  115. Looking for dual power triodes.
  116. Need advice selecting a 2A3 design
  117. Feedback basics
  118. tubalizer..
  119. The 6b4g
  120. 6N6P Operating Points
  121. Lundahl+EL84 PP+concertina+input stage
  122. Help wanted for a truly loco project. (A Tube--gainclone hybrid guitar amp!)
  123. Looking for circuit of SE amp. for Eimac 100TH
  124. Counterpoint Sa-3000 Circuit Diagram
  125. compressor Faiirchild 670 DIY
  126. How much headroom for a choke---to stop it from humming?
  127. Bay Area Diy Festival
  128. Using Eagle for Tubes designs
  129. Worst that could happen?
  130. Identifying output tx.
  131. Small pre
  132. Cathode follower driver
  133. comment on this B+ supply
  134. ODD TUBES, what to look for?
  135. 2A3 SE and Edcorp tranny
  136. Differential amplifier with 12AX7
  137. Bogen Challenger CH30 Amplifier
  138. do I need to use a heatsink on a DN2540 in a B+ supply?
  139. Transformer, 10K 1:1 - which one?
  140. Where to find Blackgate Caps?
  141. Passive Pre-Amp causes huge power loss?
  142. Rubbish fluorescent tubes: Eterna Lighting (UK), GE (US)
  143. Melos TM90 ST schematic?
  144. My first tube preamplifier:)
  145. Opinions on the Conrad Johnson MV75 amplifier please.
  146. Favorite Tubes
  147. SS replacement for 83 tube ?
  148. AMC CVT 2030 Output Transformer.
  149. 6-ohm speaker to tube amp
  150. What tubes share the pinout with the 5687?
  151. SMPS for B+ discussion
  152. Building a 200W+ bass amp
  153. need help understanding voltage regulator schematic (using CCS) from Raleigh Audio
  154. SS No R No C Power Supply for Tubes
  155. FREDs? Replace 1N4003 rectifier diodes?
  156. Hot running regulated dc filament supply for aikido preamp
  157. B+ TX. overkill?
  158. 33 Power Pentode Design Pointers Needed
  159. What Wiki?
  160. help understanding updated DRD from J Elliano's site (using 6AN4 instead of 6n1p)
  161. Zen SE84TS
  162. 5687 tube
  163. Tube vs. Semiconducter rectification
  164. Bogen CHB35 Mods and Preamp ideas
  165. I Want To Build A 100+Watt per/channel Tube Poweramp
  166. Phonodude problem
  167. enjoythemusic's t-rex amp: where is the +70VDC tap?
  168. Earthing and how it effects sound.
  169. Rectifier question
  170. Help for SE Main Transformer
  171. 6D22S Getter Question
  172. Repair of a McIntosh MC225 power amp
  173. OPA627 with tube buffer....
  174. Bell Stereophonic 3030 help
  175. Choosing the line stage preamp.
  176. I Need Help, Mcintosh/Marantz 7 content
  177. For 45 > 845: selecting an 9.5/ 10 Interstage
  178. How to reduce gain of this Tube Preamplifier ?
  179. looking for pp amp schematic without nfb
  180. Pseudo dual mono PS?
  181. WE404A drive 6L6 solution
  182. Looking for info on loudness control
  183. Tubes and minority carriers
  184. suggestions for 3 projects please
  185. DIY tube preamp kit
  186. M6 lamination: what is it?
  187. why is it that most tube projects uses copper sheetmetal?
  188. Sources in the Philippines / Manila
  189. Tube noise - Help
  190. Strange reverb circuit
  191. Tiny tube amp
  192. DC heating directly heated output valves
  193. Alps 250k in a Pas-3 Question
  194. 1st cap heats up...
  195. RCA VR Tube engineering data
  196. dropping heater voltage
  197. Please Help with Sound Valves M40 Monoblock Bias Adjustment Procedure!!!
  198. Old Sony SE OPT's /w 600r tap... cathode feedback maybe?
  199. Which is the poor man 45 tube?
  200. Audio Note Low Gain Quest Power Amplifier
  201. Quad II: Which resistors?
  202. Designing a preamp with two tubes
  203. ARC Classic 30 problem
  204. Why does the 6AS7 have such high Miller capacitance ?
  205. Driving an unusal Z=1k5-2k input spring reverb w/o tranny
  206. serching 5A6 beam power pentode data/curves/schematics for AF practice amp
  207. HPHV regulator measurement
  208. DHT Topology Comparison Question
  209. Secondary Tap of Power Transformer?
  210. Soft-clipping Circuit/tubecad
  211. lack of bass in a 6h30 design
  212. Difference between two novals
  213. C3g
  214. All Tube Stereo power amplifier
  215. what gas VR tube?
  216. KT88 schematic
  217. Help me understand the topologies here...
  218. Finished my Amp, Need to build a PS
  219. Push-Pull driver stage?
  220. Floating the heaters
  221. Replacing Power Transformer
  222. When car audio & tubes collide...
  223. 6N6P and 6SN7 Operating point suggestions
  224. NOS pF capacitors voltage rating?
  225. Tubes in Vietnam
  226. Passive pre order?
  227. layout help
  228. junkbox amp help
  229. required specs of an input step up transformer, into a 45, to allow it drive an 845
  230. 6as7 SRPP output stage
  231. Bias range and selenium rectifier
  232. OTL's and aircraft transformers
  233. PSE EL34 - valve rectification question
  234. A 2a3 Amplifier
  235. James Transformer BS
  236. Plate Voltage on 12ax7a
  237. Parallel Triodes and Load Lines
  238. Steve Bench OTL
  239. High power P-P EL34/6550/KT88 amp suggestions
  240. Stepped attenuators - break before make?
  241. audionote 144 OPT comment pls...
  242. KT88 and Hammond Transformer Schematics
  243. How do I know that my measured AC voltage is precise?
  244. 6C33B-C push pull with output transformer
  245. EL84 grid voltage?
  246. seperate power supply?
  247. Mysterious tektronix power supply
  248. tube amp subwoofer hum problem
  249. How to test transformer's current rating?
  250. Death/Black Metal sound on Crate 6212

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