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  1. comment on this B+ supply
  2. ODD TUBES, what to look for?
  3. 2A3 SE and Edcorp tranny
  4. Differential amplifier with 12AX7
  5. Bogen Challenger CH30 Amplifier
  6. do I need to use a heatsink on a DN2540 in a B+ supply?
  7. Transformer, 10K 1:1 - which one?
  8. Where to find Blackgate Caps?
  9. Passive Pre-Amp causes huge power loss?
  10. Rubbish fluorescent tubes: Eterna Lighting (UK), GE (US)
  11. Melos TM90 ST schematic?
  12. My first tube preamplifier:)
  13. Opinions on the Conrad Johnson MV75 amplifier please.
  14. Favorite Tubes
  15. SS replacement for 83 tube ?
  16. AMC CVT 2030 Output Transformer.
  17. 6-ohm speaker to tube amp
  18. What tubes share the pinout with the 5687?
  19. SMPS for B+ discussion
  20. Building a 200W+ bass amp
  21. need help understanding voltage regulator schematic (using CCS) from Raleigh Audio
  22. SS No R No C Power Supply for Tubes
  23. FREDs? Replace 1N4003 rectifier diodes?
  24. Hot running regulated dc filament supply for aikido preamp
  25. B+ TX. overkill?
  26. 33 Power Pentode Design Pointers Needed
  27. What Wiki?
  28. help understanding updated DRD from J Elliano's site (using 6AN4 instead of 6n1p)
  29. Zen SE84TS
  30. 5687 tube
  31. Tube vs. Semiconducter rectification
  32. Bogen CHB35 Mods and Preamp ideas
  33. I Want To Build A 100+Watt per/channel Tube Poweramp
  34. Phonodude problem
  35. enjoythemusic's t-rex amp: where is the +70VDC tap?
  36. Earthing and how it effects sound.
  37. Rectifier question
  38. Help for SE Main Transformer
  39. 6D22S Getter Question
  40. Repair of a McIntosh MC225 power amp
  41. OPA627 with tube buffer....
  42. Bell Stereophonic 3030 help
  43. Choosing the line stage preamp.
  44. I Need Help, Mcintosh/Marantz 7 content
  45. For 45 > 845: selecting an 9.5/ 10 Interstage
  46. How to reduce gain of this Tube Preamplifier ?
  47. looking for pp amp schematic without nfb
  48. Pseudo dual mono PS?
  49. WE404A drive 6L6 solution
  50. Looking for info on loudness control
  51. Tubes and minority carriers
  52. suggestions for 3 projects please
  53. DIY tube preamp kit
  54. M6 lamination: what is it?
  55. why is it that most tube projects uses copper sheetmetal?
  56. Sources in the Philippines / Manila
  57. Tube noise - Help
  58. Strange reverb circuit
  59. Tiny tube amp
  60. DC heating directly heated output valves
  61. Alps 250k in a Pas-3 Question
  62. 1st cap heats up...
  63. RCA VR Tube engineering data
  64. dropping heater voltage
  65. Please Help with Sound Valves M40 Monoblock Bias Adjustment Procedure!!!
  66. Old Sony SE OPT's /w 600r tap... cathode feedback maybe?
  67. Which is the poor man 45 tube?
  68. Audio Note Low Gain Quest Power Amplifier
  69. Quad II: Which resistors?
  70. Designing a preamp with two tubes
  71. ARC Classic 30 problem
  72. Why does the 6AS7 have such high Miller capacitance ?
  73. Driving an unusal Z=1k5-2k input spring reverb w/o tranny
  74. serching 5A6 beam power pentode data/curves/schematics for AF practice amp
  75. HPHV regulator measurement
  76. DHT Topology Comparison Question
  77. Secondary Tap of Power Transformer?
  78. Soft-clipping Circuit/tubecad
  79. lack of bass in a 6h30 design
  80. Difference between two novals
  81. C3g
  82. All Tube Stereo power amplifier
  83. what gas VR tube?
  84. KT88 schematic
  85. Help me understand the topologies here...
  86. Finished my Amp, Need to build a PS
  87. Push-Pull driver stage?
  88. Floating the heaters
  89. Replacing Power Transformer
  90. When car audio & tubes collide...
  91. 6N6P and 6SN7 Operating point suggestions
  92. NOS pF capacitors voltage rating?
  93. Tubes in Vietnam
  94. Passive pre order?
  95. layout help
  96. junkbox amp help
  97. required specs of an input step up transformer, into a 45, to allow it drive an 845
  98. 6as7 SRPP output stage
  99. Bias range and selenium rectifier
  100. OTL's and aircraft transformers
  101. PSE EL34 - valve rectification question
  102. A 2a3 Amplifier
  103. James Transformer BS
  104. Plate Voltage on 12ax7a
  105. Parallel Triodes and Load Lines
  106. Steve Bench OTL
  107. High power P-P EL34/6550/KT88 amp suggestions
  108. Stepped attenuators - break before make?
  109. audionote 144 OPT comment pls...
  110. KT88 and Hammond Transformer Schematics
  111. How do I know that my measured AC voltage is precise?
  112. 6C33B-C push pull with output transformer
  113. EL84 grid voltage?
  114. seperate power supply?
  115. Mysterious tektronix power supply
  116. tube amp subwoofer hum problem
  117. How to test transformer's current rating?
  118. Death/Black Metal sound on Crate 6212
  119. 4654/4699 pentodes
  120. Output tubes on a Marshall JCM900
  121. vacuum tube logic gate
  122. Screen current
  123. Any tube-sleuths out there know who made these Daystrom tubes?
  124. With this meter reading, enough to know Fuse is the culprit?
  125. need comments on amp design
  126. KEF/Celestion speakers for tube use...
  127. Another cheap fix - MOT as plate choke.
  128. XAM Mark II B
  129. How to test voltages on secondaries?
  130. Audio innovation L1 valve replacement
  131. Is this in-rush current?
  132. TETRODE amplifiers
  133. Audio Shop Eifl Corporation
  134. 6sn7 Buffer
  135. Marantz 8b operating voltages
  136. amplifier with 813 valves
  137. Changing plate resistor in live circuitry.
  138. 2xEL34 vs. 4xEL84 vs. 2x6L6 vs. 4x6V6
  139. KT88 drivers
  140. Simple Hybrid SE EL84 UL amp.. comments please.
  141. max input impedance for // el84's and other ?
  142. Please Help.. PCL81
  143. Some troubles with PSUD. A little help please !
  144. Why D getters?
  145. Help me information of the tubes?
  146. Questions about this line stage
  147. 5Z4P rectifier tube question
  148. Need help from Aikido builder
  149. Aikesi賍机el34尋找國外代理,可以送一台!!
  150. Direct heating triodes are really better?
  151. Audio Reality is back, in digital format
  152. Stoetkit 25W integrated amp
  153. Switchable stages with Tubelab抯 hybrid MOSFET/ 845 SE amp?
  154. Tube Pre Amplifier for SEWA 7 Watt ClassA MOSFET
  155. Michaelson Audio Odysseus Problem.
  156. ASC metal can polypro caps: ground the metal can to AC ground?
  157. anyone living in australia (hopefully adelaide) willing to lend their puncher/bit?
  158. ReinoutdV
  159. Priboj amp schematic
  160. EL84 in ultra-linear mode
  161. internal shielding
  162. RIAA: what does it stand for?
  163. Socket Mounting Rings
  164. heathkit sa2 - new question
  165. RCA R35, 39 & 57 Terminal Usage...
  166. 45 into an 845 parafeed circuit
  167. Tubes power supply 220 t0 300V ?
  168. ripple values in B+ supply
  169. Capacitors and tubes for AA5?
  170. Dynaco PAS Rebuild
  171. Audio Research SP9 Circuit Diagram HELP!
  172. ARC reference II schematic
  173. 71a Line Stage and Miller Capacitance
  174. Low plate voltage pentode (<40v) for diff pair?
  175. loadlines for newbie.
  176. Measuring approx RMS power O/P
  177. Hybrid Aikido-ish gain stage
  178. Loftin-White coupling Questions
  179. 807 screen regulation
  180. What kills an opt tranny?
  181. EAR529 schematic diagram
  182. World Designs KEL84 Valve Amplifier
  183. what 300B design would you recommend but...
  184. Replacement conductance meter for Hickok 533A
  185. My RIAA Phono Stage Project
  186. A2 Questions
  187. World Audio Design
  188. Seek for your comments/advice to newbie on Tube world
  189. CCSed LTP validity?
  190. Suitability of transmitter tubes for musical amplifiers
  191. Anyone using an 813 in pentode?
  192. Electrolytic in the feedback loop
  193. El34 PP Vs. El34 PSE
  194. RIAA Phono Amp Design
  195. Matching resistors to 1% or Better
  196. Wirewound cathode resistor
  197. Tube Hybrid Amp.
  198. Nasty ground loop
  199. ECC88 Class B
  200. Cree diodes
  201. Old Tube Amp Servicer In Nj???
  202. Vg-k max
  203. Anyone used PT15 / VT104 ?
  204. rebuild a Musical Fidelity X-10D ??
  205. Transformer Building
  206. Identifying weird signal transformer
  207. 100watt mono blocks
  208. Resistor combination calculator - RESCALC
  209. Aikido choice of valves (or tubes, if you will)
  210. Pin 9 on 6n6P, 6H30, etc
  211. Croft Super Micro meets Acoustat TNT200
  212. tube mic preamp kit??
  213. The SACD Meets Tubes
  214. Useful Abbreviations
  215. cap value for 6X4 rectifier?
  216. One B+ for the both driver and output tube if they are identical?
  217. Fisher 500B Schematic Question
  218. SE Output Transfromers Question
  219. Amplifier Project
  220. Grid Stopper for parallel sides of dual triode
  221. centre tap or floating heaters?
  222. Converting 6.3V to 6.3VCT Quick questions
  223. Russian Nuvistors...Anyone tried them?
  224. 一台300bc胆机,大家给点意见,谢谢
  225. Australian Amp Manufacturers
  226. Old radio quick question re PS
  227. Kt90 Pse
  228. Velleman K4040 is Always Blowing Output Tubes
  229. looking for transformer with the following specs?
  230. 5686 amplifier schematic
  231. Heaters for cathodes with a large swing
  232. 6DJ8 as phase splitter.
  233. New driver for SE 2A3
  234. I磛e made a Mu stage with 6888 and 6C45...
  235. Quick urgent Help plz !
  236. Cheap SET Kit for UK
  237. How can I change bias 6H30pi tube
  238. DHT heater voltage
  239. Ok SY...You Win
  240. Input level required- PP KT88
  241. SE 6C33C-B ; preview of a new Baby
  242. 2A3 grid DC voltage
  243. Dyna ST70 experience bypassing input tubes
  244. [Theory] Amplifier efficiency
  245. Pentode Cascode CCS
  246. Noval Relay
  247. Where to buy 6A5G ?
  248. AC or grounded DC for heater?
  249. EM84 based VUmeter "lines" don't go to zero
  250. 'scoping tube amps

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