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  1. DIY Pro Audio Recording Gear - La2a, Pultec, more.
  2. size of filtering caps SS vs OTL tube
  3. Current rating and tube current draw
  4. NUCLON -- My first hybrid guitar amp
  5. PP splitters again
  6. preamp with output trannies.
  7. Is it the 6SN7 or me?
  8. My Kind of Guitar Tuner
  9. Regulating tube amp power supply - can Iget away with a simpler CLC filtering scheme?
  10. Manufacture date of 6SN7s
  11. simple 12AU7 cathode follower
  12. How's your bench, what's your favorite setup/tool ?
  13. Siemens H42 AM/FM receiver circuit diagram?
  14. 429A load lines
  15. Mu-stage on output
  16. My new project, 2 x KT88 60W amp
  17. Tube Amp Hum
  18. Modding MEIXING MC 3008
  19. crate vc 2110 schematic ???
  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. Rectifier that doesn't need own filament supply?
  31. Plate to Cathode Cap -- what's this??
  32. Need Help Understanding/Optimising a Schematic
  33. Simple basic question quick
  34. problem on thorens PR15 (strange filaments circuity)
  35. My 1W 5687 SE Direct Coupled Power Amp
  36. VT-25 linestage + step-down trafo
  37. What to do with 803's
  38. Newbie: KT88 amp info needed
  39. 805 tube amp, uProcessor controlled
  40. Class A Tube BJT Hybrid
  41. John Broskie's enhanced T8
  42. Audio Research SP6 E
  43. Andr Charlin anybody got his Tube Amp
  44. Info needed - Shuguang SG120-C Integrated Amp
  45. Help with 6SN7 preamp
  46. 12b4 vs. aikido linestage
  47. KT88/6550 as Triode
  48. 6AU6WA triode connected as a line amp?
  49. A few basic noobie questions.
  50. Which connector for PSU/chassis B+ supply?
  51. Quad II-Forty schematic ?:
  52. Audio Research Manuals
  53. I was thinking
  54. silicon or tube rectifier?
  55. Is this OK for the Etude Preamp?
  56. gary pimm's latest self-biasing CCS circuit
  57. 46 tube pre
  58. BEZ T9B Intermittent problem
  59. Heathkit W-5M rebuild
  60. Masco MA25N repair
  61. Sunday's Project
  62. 5881- 6l6
  63. Gas-Rectifier power supply
  64. How to get more juice out of this shunt regulator
  65. Resistors on DHT Cathode
  66. Noise floor rise on heathkit W4-AMs when power supply transformers were swapped
  67. Help me finish up this SET project (multiple questions / ramblings)
  68. This Is Cool !!
  69. output bias servo
  70. Looking for dual power triodes.
  71. Need advice selecting a 2A3 design
  72. Feedback basics
  73. tubalizer..
  74. The 6b4g
  75. 6N6P Operating Points
  76. Lundahl+EL84 PP+concertina+input stage
  77. Help wanted for a truly loco project. (A Tube--gainclone hybrid guitar amp!)
  78. Looking for circuit of SE amp. for Eimac 100TH
  79. Counterpoint Sa-3000 Circuit Diagram
  80. compressor Faiirchild 670 DIY
  81. How much headroom for a choke---to stop it from humming?
  82. Bay Area Diy Festival
  83. Using Eagle for Tubes designs
  84. Worst that could happen?
  85. Identifying output tx.
  86. Small pre
  87. Cathode follower driver
  88. comment on this B+ supply
  89. ODD TUBES, what to look for?
  90. 2A3 SE and Edcorp tranny
  91. Differential amplifier with 12AX7
  92. Bogen Challenger CH30 Amplifier
  93. do I need to use a heatsink on a DN2540 in a B+ supply?
  94. Transformer, 10K 1:1 - which one?
  95. Where to find Blackgate Caps?
  96. Passive Pre-Amp causes huge power loss?
  97. Rubbish fluorescent tubes: Eterna Lighting (UK), GE (US)
  98. Melos TM90 ST schematic?
  99. My first tube preamplifier:)
  100. Opinions on the Conrad Johnson MV75 amplifier please.
  101. Favorite Tubes
  102. SS replacement for 83 tube ?
  103. AMC CVT 2030 Output Transformer.
  104. 6-ohm speaker to tube amp
  105. What tubes share the pinout with the 5687?
  106. SMPS for B+ discussion
  107. Building a 200W+ bass amp
  108. need help understanding voltage regulator schematic (using CCS) from Raleigh Audio
  109. SS No R No C Power Supply for Tubes
  110. FREDs? Replace 1N4003 rectifier diodes?
  111. Hot running regulated dc filament supply for aikido preamp
  112. B+ TX. overkill?
  113. 33 Power Pentode Design Pointers Needed
  114. What Wiki?
  115. help understanding updated DRD from J Elliano's site (using 6AN4 instead of 6n1p)
  116. Zen SE84TS
  117. 5687 tube
  118. Tube vs. Semiconducter rectification
  119. Bogen CHB35 Mods and Preamp ideas
  120. I Want To Build A 100+Watt per/channel Tube Poweramp
  121. Phonodude problem
  122. enjoythemusic's t-rex amp: where is the +70VDC tap?
  123. Earthing and how it effects sound.
  124. Rectifier question
  125. Help for SE Main Transformer
  126. 6D22S Getter Question
  127. Repair of a McIntosh MC225 power amp
  128. OPA627 with tube buffer....
  129. Bell Stereophonic 3030 help
  130. Choosing the line stage preamp.
  131. I Need Help, Mcintosh/Marantz 7 content
  132. For 45 > 845: selecting an 9.5/ 10 Interstage
  133. How to reduce gain of this Tube Preamplifier ?
  134. looking for pp amp schematic without nfb
  135. Pseudo dual mono PS?
  136. WE404A drive 6L6 solution
  137. Looking for info on loudness control
  138. Tubes and minority carriers
  139. suggestions for 3 projects please
  140. DIY tube preamp kit
  141. M6 lamination: what is it?
  142. why is it that most tube projects uses copper sheetmetal?
  143. Sources in the Philippines / Manila
  144. Tube noise - Help
  145. Strange reverb circuit
  146. Tiny tube amp
  147. DC heating directly heated output valves
  148. Alps 250k in a Pas-3 Question
  149. 1st cap heats up...
  150. RCA VR Tube engineering data
  151. dropping heater voltage
  152. Please Help with Sound Valves M40 Monoblock Bias Adjustment Procedure!!!
  153. Old Sony SE OPT's /w 600r tap... cathode feedback maybe?
  154. Which is the poor man 45 tube?
  155. Audio Note Low Gain Quest Power Amplifier
  156. Quad II: Which resistors?
  157. Designing a preamp with two tubes
  158. ARC Classic 30 problem
  159. Why does the 6AS7 have such high Miller capacitance ?
  160. Driving an unusal Z=1k5-2k input spring reverb w/o tranny
  161. serching 5A6 beam power pentode data/curves/schematics for AF practice amp
  162. HPHV regulator measurement
  163. DHT Topology Comparison Question
  164. Secondary Tap of Power Transformer?
  165. Soft-clipping Circuit/tubecad
  166. lack of bass in a 6h30 design
  167. Difference between two novals
  168. C3g
  169. All Tube Stereo power amplifier
  170. what gas VR tube?
  171. KT88 schematic
  172. Help me understand the topologies here...
  173. Finished my Amp, Need to build a PS
  174. Push-Pull driver stage?
  175. Floating the heaters
  176. Replacing Power Transformer
  177. When car audio & tubes collide...
  178. 6N6P and 6SN7 Operating point suggestions
  179. NOS pF capacitors voltage rating?
  180. Tubes in Vietnam
  181. Passive pre order?
  182. layout help
  183. junkbox amp help
  184. required specs of an input step up transformer, into a 45, to allow it drive an 845
  185. 6as7 SRPP output stage
  186. Bias range and selenium rectifier
  187. OTL's and aircraft transformers
  188. PSE EL34 - valve rectification question
  189. A 2a3 Amplifier
  190. James Transformer BS
  191. Plate Voltage on 12ax7a
  192. Parallel Triodes and Load Lines
  193. Steve Bench OTL
  194. High power P-P EL34/6550/KT88 amp suggestions
  195. Stepped attenuators - break before make?
  196. audionote 144 OPT comment pls...
  197. KT88 and Hammond Transformer Schematics
  198. How do I know that my measured AC voltage is precise?
  199. 6C33B-C push pull with output transformer
  200. EL84 grid voltage?
  201. seperate power supply?
  202. Mysterious tektronix power supply
  203. tube amp subwoofer hum problem
  204. How to test transformer's current rating?
  205. Death/Black Metal sound on Crate 6212
  206. 4654/4699 pentodes
  207. Output tubes on a Marshall JCM900
  208. vacuum tube logic gate
  209. Screen current
  210. Any tube-sleuths out there know who made these Daystrom tubes?
  211. With this meter reading, enough to know Fuse is the culprit?
  212. need comments on amp design
  213. KEF/Celestion speakers for tube use...
  214. Another cheap fix - MOT as plate choke.
  215. XAM Mark II B
  216. How to test voltages on secondaries?
  217. Audio innovation L1 valve replacement
  218. Is this in-rush current?
  219. TETRODE amplifiers
  220. Audio Shop Eifl Corporation
  221. 6sn7 Buffer
  222. Marantz 8b operating voltages
  223. amplifier with 813 valves
  224. Changing plate resistor in live circuitry.
  225. 2xEL34 vs. 4xEL84 vs. 2x6L6 vs. 4x6V6
  226. KT88 drivers
  227. Simple Hybrid SE EL84 UL amp.. comments please.
  228. max input impedance for // el84's and other ?
  229. Please Help.. PCL81
  230. Some troubles with PSUD. A little help please !
  231. Why D getters?
  232. Help me information of the tubes?
  233. Questions about this line stage
  234. 5Z4P rectifier tube question
  235. Need help from Aikido builder
  236. Aikesi_el34҇һ̨
  237. Direct heating triodes are really better?
  238. Audio Reality is back, in digital format
  239. Stoetkit 25W integrated amp
  240. Switchable stages with Tubelabs hybrid MOSFET/ 845 SE amp?
  241. Tube Pre Amplifier for SEWA 7 Watt ClassA MOSFET
  242. Michaelson Audio Odysseus Problem.
  243. ASC metal can polypro caps: ground the metal can to AC ground?
  244. anyone living in australia (hopefully adelaide) willing to lend their puncher/bit?
  245. ReinoutdV
  246. Priboj amp schematic
  247. EL84 in ultra-linear mode
  248. internal shielding
  249. RIAA: what does it stand for?
  250. Socket Mounting Rings

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