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  1. Heater to cathode voltage limits in cascodes???
  2. some Japanese can help me? (OPT trafo winding)
  3. Quicksilver 8417 a class C amp?
  4. Newcomer, where to start?
  5. Benefits of Potted Output Transformers
  6. Transformer question
  7. 6AW6A, Unloaded
  8. Aikido PSU help
  9. Rectifier that doesn't need own filament supply?
  10. Plate to Cathode Cap -- what's this??
  11. Need Help Understanding/Optimising a Schematic
  12. Simple basic question quick
  13. problem on thorens PR15 (strange filaments circuity)
  14. My 1W 5687 SE Direct Coupled Power Amp
  15. VT-25 linestage + step-down trafo
  16. What to do with 803's
  17. Newbie: KT88 amp info needed
  18. 805 tube amp, uProcessor controlled
  19. Class A Tube BJT Hybrid
  20. John Broskie's enhanced T8
  21. Audio Research SP6 E
  22. Andr Charlin anybody got his Tube Amp
  23. Info needed - Shuguang SG120-C Integrated Amp
  24. Help with 6SN7 preamp
  25. 12b4 vs. aikido linestage
  26. KT88/6550 as Triode
  27. 6AU6WA triode connected as a line amp?
  28. A few basic noobie questions.
  29. Which connector for PSU/chassis B+ supply?
  30. Quad II-Forty schematic ?:
  31. Audio Research Manuals
  32. I was thinking
  33. silicon or tube rectifier?
  34. Is this OK for the Etude Preamp?
  35. gary pimm's latest self-biasing CCS circuit
  36. 46 tube pre
  37. BEZ T9B Intermittent problem
  38. Heathkit W-5M rebuild
  39. Masco MA25N repair
  40. Sunday's Project
  41. 5881- 6l6
  42. Gas-Rectifier power supply
  43. How to get more juice out of this shunt regulator
  44. Resistors on DHT Cathode
  45. Noise floor rise on heathkit W4-AMs when power supply transformers were swapped
  46. Help me finish up this SET project (multiple questions / ramblings)
  47. This Is Cool !!
  48. output bias servo
  49. Looking for dual power triodes.
  50. Need advice selecting a 2A3 design
  51. Feedback basics
  52. tubalizer..
  53. The 6b4g
  54. 6N6P Operating Points
  55. Lundahl+EL84 PP+concertina+input stage
  56. Help wanted for a truly loco project. (A Tube--gainclone hybrid guitar amp!)
  57. Looking for circuit of SE amp. for Eimac 100TH
  58. Counterpoint Sa-3000 Circuit Diagram
  59. compressor Faiirchild 670 DIY
  60. How much headroom for a choke---to stop it from humming?
  61. Bay Area Diy Festival
  62. Using Eagle for Tubes designs
  63. Worst that could happen?
  64. Identifying output tx.
  65. Small pre
  66. Cathode follower driver
  67. comment on this B+ supply
  68. ODD TUBES, what to look for?
  69. 2A3 SE and Edcorp tranny
  70. Differential amplifier with 12AX7
  71. Bogen Challenger CH30 Amplifier
  72. do I need to use a heatsink on a DN2540 in a B+ supply?
  73. Transformer, 10K 1:1 - which one?
  74. Where to find Blackgate Caps?
  75. Passive Pre-Amp causes huge power loss?
  76. Rubbish fluorescent tubes: Eterna Lighting (UK), GE (US)
  77. Melos TM90 ST schematic?
  78. My first tube preamplifier:)
  79. Opinions on the Conrad Johnson MV75 amplifier please.
  80. Favorite Tubes
  81. SS replacement for 83 tube ?
  82. AMC CVT 2030 Output Transformer.
  83. 6-ohm speaker to tube amp
  84. What tubes share the pinout with the 5687?
  85. SMPS for B+ discussion
  86. Building a 200W+ bass amp
  87. need help understanding voltage regulator schematic (using CCS) from Raleigh Audio
  88. SS No R No C Power Supply for Tubes
  89. FREDs? Replace 1N4003 rectifier diodes?
  90. Hot running regulated dc filament supply for aikido preamp
  91. B+ TX. overkill?
  92. 33 Power Pentode Design Pointers Needed
  93. What Wiki?
  94. help understanding updated DRD from J Elliano's site (using 6AN4 instead of 6n1p)
  95. Zen SE84TS
  96. 5687 tube
  97. Tube vs. Semiconducter rectification
  98. Bogen CHB35 Mods and Preamp ideas
  99. I Want To Build A 100+Watt per/channel Tube Poweramp
  100. Phonodude problem
  101. enjoythemusic's t-rex amp: where is the +70VDC tap?
  102. Earthing and how it effects sound.
  103. Rectifier question
  104. Help for SE Main Transformer
  105. 6D22S Getter Question
  106. Repair of a McIntosh MC225 power amp
  107. OPA627 with tube buffer....
  108. Bell Stereophonic 3030 help
  109. Choosing the line stage preamp.
  110. I Need Help, Mcintosh/Marantz 7 content
  111. For 45 > 845: selecting an 9.5/ 10 Interstage
  112. How to reduce gain of this Tube Preamplifier ?
  113. looking for pp amp schematic without nfb
  114. Pseudo dual mono PS?
  115. WE404A drive 6L6 solution
  116. Looking for info on loudness control
  117. Tubes and minority carriers
  118. suggestions for 3 projects please
  119. DIY tube preamp kit
  120. M6 lamination: what is it?
  121. why is it that most tube projects uses copper sheetmetal?
  122. Sources in the Philippines / Manila
  123. Tube noise - Help
  124. Strange reverb circuit
  125. Tiny tube amp
  126. DC heating directly heated output valves
  127. Alps 250k in a Pas-3 Question
  128. 1st cap heats up...
  129. RCA VR Tube engineering data
  130. dropping heater voltage
  131. Please Help with Sound Valves M40 Monoblock Bias Adjustment Procedure!!!
  132. Old Sony SE OPT's /w 600r tap... cathode feedback maybe?
  133. Which is the poor man 45 tube?
  134. Audio Note Low Gain Quest Power Amplifier
  135. Quad II: Which resistors?
  136. Designing a preamp with two tubes
  137. ARC Classic 30 problem
  138. Why does the 6AS7 have such high Miller capacitance ?
  139. Driving an unusal Z=1k5-2k input spring reverb w/o tranny
  140. serching 5A6 beam power pentode data/curves/schematics for AF practice amp
  141. HPHV regulator measurement
  142. DHT Topology Comparison Question
  143. Secondary Tap of Power Transformer?
  144. Soft-clipping Circuit/tubecad
  145. lack of bass in a 6h30 design
  146. Difference between two novals
  147. C3g
  148. All Tube Stereo power amplifier
  149. what gas VR tube?
  150. KT88 schematic
  151. Help me understand the topologies here...
  152. Finished my Amp, Need to build a PS
  153. Push-Pull driver stage?
  154. Floating the heaters
  155. Replacing Power Transformer
  156. When car audio & tubes collide...
  157. 6N6P and 6SN7 Operating point suggestions
  158. NOS pF capacitors voltage rating?
  159. Tubes in Vietnam
  160. Passive pre order?
  161. layout help
  162. junkbox amp help
  163. required specs of an input step up transformer, into a 45, to allow it drive an 845
  164. 6as7 SRPP output stage
  165. Bias range and selenium rectifier
  166. OTL's and aircraft transformers
  167. PSE EL34 - valve rectification question
  168. A 2a3 Amplifier
  169. James Transformer BS
  170. Plate Voltage on 12ax7a
  171. Parallel Triodes and Load Lines
  172. Steve Bench OTL
  173. High power P-P EL34/6550/KT88 amp suggestions
  174. Stepped attenuators - break before make?
  175. audionote 144 OPT comment pls...
  176. KT88 and Hammond Transformer Schematics
  177. How do I know that my measured AC voltage is precise?
  178. 6C33B-C push pull with output transformer
  179. EL84 grid voltage?
  180. seperate power supply?
  181. Mysterious tektronix power supply
  182. tube amp subwoofer hum problem
  183. How to test transformer's current rating?
  184. Death/Black Metal sound on Crate 6212
  185. 4654/4699 pentodes
  186. Output tubes on a Marshall JCM900
  187. vacuum tube logic gate
  188. Screen current
  189. Any tube-sleuths out there know who made these Daystrom tubes?
  190. With this meter reading, enough to know Fuse is the culprit?
  191. need comments on amp design
  192. KEF/Celestion speakers for tube use...
  193. Another cheap fix - MOT as plate choke.
  194. XAM Mark II B
  195. How to test voltages on secondaries?
  196. Audio innovation L1 valve replacement
  197. Is this in-rush current?
  198. TETRODE amplifiers
  199. Audio Shop Eifl Corporation
  200. 6sn7 Buffer
  201. Marantz 8b operating voltages
  202. amplifier with 813 valves
  203. Changing plate resistor in live circuitry.
  204. 2xEL34 vs. 4xEL84 vs. 2x6L6 vs. 4x6V6
  205. KT88 drivers
  206. Simple Hybrid SE EL84 UL amp.. comments please.
  207. max input impedance for // el84's and other ?
  208. Please Help.. PCL81
  209. Some troubles with PSUD. A little help please !
  210. Why D getters?
  211. Help me information of the tubes?
  212. Questions about this line stage
  213. 5Z4P rectifier tube question
  214. Need help from Aikido builder
  215. Aikesi_el34҇һ̨
  216. Direct heating triodes are really better?
  217. Audio Reality is back, in digital format
  218. Stoetkit 25W integrated amp
  219. Switchable stages with Tubelabs hybrid MOSFET/ 845 SE amp?
  220. Tube Pre Amplifier for SEWA 7 Watt ClassA MOSFET
  221. Michaelson Audio Odysseus Problem.
  222. ASC metal can polypro caps: ground the metal can to AC ground?
  223. anyone living in australia (hopefully adelaide) willing to lend their puncher/bit?
  224. ReinoutdV
  225. Priboj amp schematic
  226. EL84 in ultra-linear mode
  227. internal shielding
  228. RIAA: what does it stand for?
  229. Socket Mounting Rings
  230. heathkit sa2 - new question
  231. RCA R35, 39 & 57 Terminal Usage...
  232. 45 into an 845 parafeed circuit
  233. Tubes power supply 220 t0 300V ?
  234. ripple values in B+ supply
  235. Capacitors and tubes for AA5?
  236. Dynaco PAS Rebuild
  237. Audio Research SP9 Circuit Diagram HELP!
  238. ARC reference II schematic
  239. 71a Line Stage and Miller Capacitance
  240. Low plate voltage pentode (<40v) for diff pair?
  241. loadlines for newbie.
  242. Measuring approx RMS power O/P
  243. Hybrid Aikido-ish gain stage
  244. Loftin-White coupling Questions
  245. 807 screen regulation
  246. What kills an opt tranny?
  247. EAR529 schematic diagram
  248. World Designs KEL84 Valve Amplifier
  249. what 300B design would you recommend but...
  250. Replacement conductance meter for Hickok 533A

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