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  1. How do I bias up a constant current series filament circuit?
  2. The perfect phono preamp.
  3. Got my 6BG6GA's last night
  4. Tubes4HiFi SP-6 preamp
  5. Stupid electrolytic cap question.......
  6. Shuguang 807s?
  7. LX-72A Sanity Check for Noooobie?
  8. Convert EL84 to 6V6? Anyone try this?
  9. PC96
  10. Ultrapath output transformers
  11. Grant RIAA phono with 12AX7/ECC83
  12. Tube VS SS voltage regulators - any advantages?
  13. Ra-a??
  14. Help with my el509 amp almost done but with one problem.
  15. McIntosh chassis help needed
  16. Tube Voltage Regulator Design
  17. DC Tube Amplifiers
  18. Coupling cap voltage rating
  19. Anyone experienced in the 76 tube?
  20. aikido thump
  21. bypassing preamp board in integrated amp
  22. Mallory FP 2x30/500 for Scott LX-72 - NOOB
  23. is it really required to use carbon comp for grid stoppers?
  24. How much trickle current can fixed bias cathode batteries stand?
  25. Who is the administrator?
  26. LM329 as voltage reference in a CCS.
  27. Euridice Preamp with 5842 and LL1660
  28. Trans. alignments
  29. Audio Note M3 Kit modification
  30. Has anyone simulated an "Aikido" amplifier?
  31. Upgrading ST70 PS w/ SS question
  32. 6N1 Chinese tube and others
  33. 12AT7 Linestage design
  34. ECF80 instead of 7199
  35. Modifying a tube tester into a curve tracer (oscilloscope X/Y outputs) ?
  36. 6922 vs 6SN7
  37. Transformer DCR's
  38. ferrite beads v. grid resistor
  39. What went wrong with my amp? Bass driver strange movement.
  40. Toccata Phono Preamp
  41. Drawbacks of Parafeed?
  42. aikido problem
  43. RS253 giant SE monoblock (Chinese)
  44. Plate chokes & Power chokes
  45. 10uF filter cap too small? PSU schematic inside
  46. HOT ROD DELUXE: CRACKLE...POP...what to do?
  47. converting Baldwin organ amp to guitar
  48. best amp for rock n roll
  49. quick question about tube relays
  50. Yeo's Simple EL84 with a twist
  51. ST-70 OPT, A-470 question
  52. meixing 805 tube amp problems
  53. Advice for NOOBie - Dad's Scott LK-72
  54. Peavey Valve King 112
  55. KT66 SE amp, grid current or not?
  56. 269EX in a champ?
  57. How do I achieve more output power?
  58. Driver stage load resistor
  59. More Edcor XSM10K/10K Specs
  60. DC filament
  61. driver stages
  62. Bay Area DIY is Cancelled Because....
  63. Is constant filament current better way to build amps?
  64. Next amp build - Trainwreck - Princeton - Deluxe ???
  65. Quicksilver M135 Output Transformers Color Code?
  66. Dynaco ST70 clone, tubes substitution question
  67. caddocks mk132: has anyone used them for tube projects?
  68. DIY Pro Audio Recording Gear - La2a, Pultec, more.
  69. size of filtering caps SS vs OTL tube
  70. Current rating and tube current draw
  71. NUCLON -- My first hybrid guitar amp
  72. PP splitters again
  73. preamp with output trannies.
  74. Is it the 6SN7 or me?
  75. My Kind of Guitar Tuner
  76. Regulating tube amp power supply - can Iget away with a simpler CLC filtering scheme?
  77. Manufacture date of 6SN7s
  78. simple 12AU7 cathode follower
  79. How's your bench, what's your favorite setup/tool ?
  80. Siemens H42 AM/FM receiver circuit diagram?
  81. 429A load lines
  82. Mu-stage on output
  83. My new project, 2 x KT88 60W amp
  84. Tube Amp Hum
  85. Modding MEIXING MC 3008
  86. crate vc 2110 schematic ???
  87. Will this work for an EL84 push pull?
  88. "Integrated" or "stand alone"
  89. Heater to cathode voltage limits in cascodes???
  90. some Japanese can help me? (OPT trafo winding)
  91. Quicksilver 8417 a class C amp?
  92. Newcomer, where to start?
  93. Benefits of Potted Output Transformers
  94. Transformer question
  95. 6AW6A, Unloaded
  96. Aikido PSU help
  97. Rectifier that doesn't need own filament supply?
  98. Plate to Cathode Cap -- what's this??
  99. Need Help Understanding/Optimising a Schematic
  100. Simple basic question quick
  101. problem on thorens PR15 (strange filaments circuity)
  102. My 1W 5687 SE Direct Coupled Power Amp
  103. VT-25 linestage + step-down trafo
  104. What to do with 803's
  105. Newbie: KT88 amp info needed
  106. 805 tube amp, uProcessor controlled
  107. Class A Tube BJT Hybrid
  108. John Broskie's enhanced T8
  109. Audio Research SP6 E
  110. André Charlin anybody got his Tube Amp
  111. Info needed - Shuguang SG120-C Integrated Amp
  112. Help with 6SN7 preamp
  113. 12b4 vs. aikido linestage
  114. KT88/6550 as Triode
  115. 6AU6WA triode connected as a line amp?
  116. A few basic noobie questions.
  117. Which connector for PSU/chassis B+ supply?
  118. Quad II-Forty schematic ?:
  119. Audio Research Manuals
  120. I was thinking
  121. silicon or tube rectifier?
  122. Is this OK for the Etude Preamp?
  123. gary pimm's latest self-biasing CCS circuit
  124. 46 tube pre
  125. BEZ T9B Intermittent problem
  126. Heathkit W-5M rebuild
  127. Masco MA25N repair
  128. Sunday's Project
  129. 5881- 6l6
  130. Gas-Rectifier power supply
  131. How to get more juice out of this shunt regulator
  132. Resistors on DHT Cathode
  133. Noise floor rise on heathkit W4-AMs when power supply transformers were swapped
  134. Help me finish up this SET project (multiple questions / ramblings)
  135. This Is Cool !!
  136. output bias servo
  137. Looking for dual power triodes.
  138. Need advice selecting a 2A3 design
  139. Feedback basics
  140. tubalizer..
  141. The 6b4g
  142. 6N6P Operating Points
  143. Lundahl+EL84 PP+concertina+input stage
  144. Help wanted for a truly loco project. (A Tube--gainclone hybrid guitar amp!)
  145. Looking for circuit of SE amp. for Eimac 100TH
  146. Counterpoint Sa-3000 Circuit Diagram
  147. compressor Faiirchild 670 DIY
  148. How much headroom for a choke---to stop it from humming?
  149. Bay Area Diy Festival
  150. Using Eagle for Tubes designs
  151. Worst that could happen?
  152. Identifying output tx.
  153. Small pre
  154. Cathode follower driver
  155. comment on this B+ supply
  156. ODD TUBES, what to look for?
  157. 2A3 SE and Edcorp tranny
  158. Differential amplifier with 12AX7
  159. Bogen Challenger CH30 Amplifier
  160. do I need to use a heatsink on a DN2540 in a B+ supply?
  161. Transformer, 10K 1:1 - which one?
  162. Where to find Blackgate Caps?
  163. Passive Pre-Amp causes huge power loss?
  164. Rubbish fluorescent tubes: Eterna Lighting (UK), GE (US)
  165. Melos TM90 ST schematic?
  166. My first tube preamplifier:)
  167. Opinions on the Conrad Johnson MV75 amplifier please.
  168. Favorite Tubes
  169. SS replacement for 83 tube ?
  170. AMC CVT 2030 Output Transformer.
  171. 6-ohm speaker to tube amp
  172. What tubes share the pinout with the 5687?
  173. SMPS for B+ discussion
  174. Building a 200W+ bass amp
  175. need help understanding voltage regulator schematic (using CCS) from Raleigh Audio
  176. SS No R No C Power Supply for Tubes
  177. FREDs? Replace 1N4003 rectifier diodes?
  178. Hot running regulated dc filament supply for aikido preamp
  179. B+ TX. overkill?
  180. 33 Power Pentode Design Pointers Needed
  181. What Wiki?
  182. help understanding updated DRD from J Elliano's site (using 6AN4 instead of 6n1p)
  183. Zen SE84TS
  184. 5687 tube
  185. Tube vs. Semiconducter rectification
  186. Bogen CHB35 Mods and Preamp ideas
  187. I Want To Build A 100+Watt per/channel Tube Poweramp
  188. Phonodude problem
  189. enjoythemusic's t-rex amp: where is the +70VDC tap?
  190. Earthing and how it effects sound.
  191. Rectifier question
  192. Help for SE Main Transformer
  193. 6D22S Getter Question
  194. Repair of a McIntosh MC225 power amp
  195. OPA627 with tube buffer....
  196. Bell Stereophonic 3030 help
  197. Choosing the line stage preamp.
  198. I Need Help, Mcintosh/Marantz 7 content
  199. For 45 > 845: selecting an 9.5/ 10 Interstage
  200. How to reduce gain of this Tube Preamplifier ?
  201. looking for pp amp schematic without nfb
  202. Pseudo dual mono PS?
  203. WE404A drive 6L6 solution
  204. Looking for info on loudness control
  205. Tubes and minority carriers
  206. suggestions for 3 projects please
  207. DIY tube preamp kit
  208. M6 lamination: what is it?
  209. why is it that most tube projects uses copper sheetmetal?
  210. Sources in the Philippines / Manila
  211. Tube noise - Help
  212. Strange reverb circuit
  213. Tiny tube amp
  214. DC heating directly heated output valves
  215. Alps 250k in a Pas-3 Question
  216. 1st cap heats up...
  217. RCA VR Tube engineering data
  218. dropping heater voltage
  219. Please Help with Sound Valves M40 Monoblock Bias Adjustment Procedure!!!
  220. Old Sony SE OPT's /w 600r tap... cathode feedback maybe?
  221. Which is the poor man 45 tube?
  222. Audio Note Low Gain Quest Power Amplifier
  223. Quad II: Which resistors?
  224. Designing a preamp with two tubes
  225. ARC Classic 30 problem
  226. Why does the 6AS7 have such high Miller capacitance ?
  227. Driving an unusal Z=1k5-2k input spring reverb w/o tranny
  228. serching 5A6 beam power pentode data/curves/schematics for AF practice amp
  229. HPHV regulator measurement
  230. DHT Topology Comparison Question
  231. Secondary Tap of Power Transformer?
  232. Soft-clipping Circuit/tubecad
  233. lack of bass in a 6h30 design
  234. Difference between two novals
  235. C3g
  236. All Tube Stereo power amplifier
  237. what gas VR tube?
  238. KT88 schematic
  239. Help me understand the topologies here...
  240. Finished my Amp, Need to build a PS
  241. Push-Pull driver stage?
  242. Floating the heaters
  243. Replacing Power Transformer
  244. When car audio & tubes collide...
  245. 6N6P and 6SN7 Operating point suggestions
  246. NOS pF capacitors voltage rating?
  247. Tubes in Vietnam
  248. Passive pre order?
  249. layout help
  250. junkbox amp help

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