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  1. Tube Amp Hum
  2. Modding MEIXING MC 3008
  3. Will this work for an EL84 push pull?
  4. "Integrated" or "stand alone"
  5. Heater to cathode voltage limits in cascodes???
  6. some Japanese can help me? (OPT trafo winding)
  7. Quicksilver 8417 a class C amp?
  8. Newcomer, where to start?
  9. Benefits of Potted Output Transformers
  10. Transformer question
  11. 6AW6A, Unloaded
  12. Aikido PSU help
  13. Plate to Cathode Cap -- what's this??
  14. Need Help Understanding/Optimising a Schematic
  15. Simple basic question quick
  16. problem on thorens PR15 (strange filaments circuity)
  17. My 1W 5687 SE Direct Coupled Power Amp
  18. VT-25 linestage + step-down trafo
  19. What to do with 803's
  20. Newbie: KT88 amp info needed
  21. 805 tube amp, uProcessor controlled
  22. Class A Tube BJT Hybrid
  23. John Broskie's enhanced T8
  24. Audio Research SP6 E
  25. Andr Charlin anybody got his Tube Amp
  26. Info needed - Shuguang SG120-C Integrated Amp
  27. Help with 6SN7 preamp
  28. 12b4 vs. aikido linestage
  29. KT88/6550 as Triode
  30. 6AU6WA triode connected as a line amp?
  31. A few basic noobie questions.
  32. Which connector for PSU/chassis B+ supply?
  33. Quad II-Forty schematic ?:
  34. Audio Research Manuals
  35. I was thinking
  36. Is this OK for the Etude Preamp?
  37. gary pimm's latest self-biasing CCS circuit
  38. 46 tube pre
  39. BEZ T9B Intermittent problem
  40. Heathkit W-5M rebuild
  41. Masco MA25N repair
  42. Sunday's Project
  43. 5881- 6l6
  44. Gas-Rectifier power supply
  45. How to get more juice out of this shunt regulator
  46. Resistors on DHT Cathode
  47. Noise floor rise on heathkit W4-AMs when power supply transformers were swapped
  48. Help me finish up this SET project (multiple questions / ramblings)
  49. This Is Cool !!
  50. output bias servo
  51. Looking for dual power triodes.
  52. Need advice selecting a 2A3 design
  53. Feedback basics
  54. tubalizer..
  55. The 6b4g
  56. 6N6P Operating Points
  57. Lundahl+EL84 PP+concertina+input stage
  58. Looking for circuit of SE amp. for Eimac 100TH
  59. Counterpoint Sa-3000 Circuit Diagram
  60. compressor Faiirchild 670 DIY
  61. How much headroom for a choke---to stop it from humming?
  62. Bay Area Diy Festival
  63. Using Eagle for Tubes designs
  64. Worst that could happen?
  65. Identifying output tx.
  66. Small pre
  67. Cathode follower driver
  68. comment on this B+ supply
  69. ODD TUBES, what to look for?
  70. 2A3 SE and Edcorp tranny
  71. Differential amplifier with 12AX7
  72. Bogen Challenger CH30 Amplifier
  73. do I need to use a heatsink on a DN2540 in a B+ supply?
  74. Transformer, 10K 1:1 - which one?
  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. SS No R No C Power Supply for Tubes
  87. Hot running regulated dc filament supply for aikido preamp
  88. B+ TX. overkill?
  89. 33 Power Pentode Design Pointers Needed
  90. What Wiki?
  91. help understanding updated DRD from J Elliano's site (using 6AN4 instead of 6n1p)
  92. Zen SE84TS
  93. 5687 tube
  94. Tube vs. Semiconducter rectification
  95. Bogen CHB35 Mods and Preamp ideas
  96. I Want To Build A 100+Watt per/channel Tube Poweramp
  97. Phonodude problem
  98. enjoythemusic's t-rex amp: where is the +70VDC tap?
  99. Earthing and how it effects sound.
  100. 6D22S Getter Question
  101. Repair of a McIntosh MC225 power amp
  102. OPA627 with tube buffer....
  103. Bell Stereophonic 3030 help
  104. Choosing the line stage preamp.
  105. I Need Help, Mcintosh/Marantz 7 content
  106. For 45 > 845: selecting an 9.5/ 10 Interstage
  107. How to reduce gain of this Tube Preamplifier ?
  108. looking for pp amp schematic without nfb
  109. Pseudo dual mono PS?
  110. WE404A drive 6L6 solution
  111. Looking for info on loudness control
  112. Tubes and minority carriers
  113. suggestions for 3 projects please
  114. DIY tube preamp kit
  115. M6 lamination: what is it?
  116. why is it that most tube projects uses copper sheetmetal?
  117. Sources in the Philippines / Manila
  118. Tube noise - Help
  119. Tiny tube amp
  120. DC heating directly heated output valves
  121. Alps 250k in a Pas-3 Question
  122. 1st cap heats up...
  123. RCA VR Tube engineering data
  124. dropping heater voltage
  125. Please Help with Sound Valves M40 Monoblock Bias Adjustment Procedure!!!
  126. Old Sony SE OPT's /w 600r tap... cathode feedback maybe?
  127. Which is the poor man 45 tube?
  128. Audio Note Low Gain Quest Power Amplifier
  129. Quad II: Which resistors?
  130. Designing a preamp with two tubes
  131. ARC Classic 30 problem
  132. Why does the 6AS7 have such high Miller capacitance ?
  133. serching 5A6 beam power pentode data/curves/schematics for AF practice amp
  134. DHT Topology Comparison Question
  135. Secondary Tap of Power Transformer?
  136. Soft-clipping Circuit/tubecad
  137. lack of bass in a 6h30 design
  138. Difference between two novals
  139. C3g
  140. All Tube Stereo power amplifier
  141. what gas VR tube?
  142. KT88 schematic
  143. Help me understand the topologies here...
  144. Finished my Amp, Need to build a PS
  145. Push-Pull driver stage?
  146. Floating the heaters
  147. Replacing Power Transformer
  148. When car audio & tubes collide...
  149. 6N6P and 6SN7 Operating point suggestions
  150. NOS pF capacitors voltage rating?
  151. Tubes in Vietnam
  152. Passive pre order?
  153. layout help
  154. junkbox amp help
  155. required specs of an input step up transformer, into a 45, to allow it drive an 845
  156. 6as7 SRPP output stage
  157. OTL's and aircraft transformers
  158. PSE EL34 - valve rectification question
  159. A 2a3 Amplifier
  160. James Transformer BS
  161. Plate Voltage on 12ax7a
  162. Parallel Triodes and Load Lines
  163. Steve Bench OTL
  164. High power P-P EL34/6550/KT88 amp suggestions
  165. Stepped attenuators - break before make?
  166. audionote 144 OPT comment pls...
  167. KT88 and Hammond Transformer Schematics
  168. How do I know that my measured AC voltage is precise?
  169. 6C33B-C push pull with output transformer
  170. EL84 grid voltage?
  171. Mysterious tektronix power supply
  172. tube amp subwoofer hum problem
  173. 4654/4699 pentodes
  174. vacuum tube logic gate
  175. Screen current
  176. Any tube-sleuths out there know who made these Daystrom tubes?
  177. With this meter reading, enough to know Fuse is the culprit?
  178. need comments on amp design
  179. KEF/Celestion speakers for tube use...
  180. Another cheap fix - MOT as plate choke.
  181. XAM Mark II B
  182. Audio innovation L1 valve replacement
  183. TETRODE amplifiers
  184. Audio Shop Eifl Corporation
  185. 6sn7 Buffer
  186. Marantz 8b operating voltages
  187. amplifier with 813 valves
  188. Changing plate resistor in live circuitry.
  189. 2xEL34 vs. 4xEL84 vs. 2x6L6 vs. 4x6V6
  190. KT88 drivers
  191. Simple Hybrid SE EL84 UL amp.. comments please.
  192. max input impedance for // el84's and other ?
  193. Please Help.. PCL81
  194. Some troubles with PSUD. A little help please !
  195. Why D getters?
  196. Help me information of the tubes?
  197. Questions about this line stage
  198. Need help from Aikido builder
  199. Aikesi_el34҇һ̨
  200. Direct heating triodes are really better?
  201. Audio Reality is back, in digital format
  202. Stoetkit 25W integrated amp
  203. Switchable stages with Tubelabs hybrid MOSFET/ 845 SE amp?
  204. Tube Pre Amplifier for SEWA 7 Watt ClassA MOSFET
  205. Michaelson Audio Odysseus Problem.
  206. anyone living in australia (hopefully adelaide) willing to lend their puncher/bit?
  207. ReinoutdV
  208. Priboj amp schematic
  209. EL84 in ultra-linear mode
  210. internal shielding
  211. RIAA: what does it stand for?
  212. Socket Mounting Rings
  213. heathkit sa2 - new question
  214. RCA R35, 39 & 57 Terminal Usage...
  215. 45 into an 845 parafeed circuit
  216. Tubes power supply 220 t0 300V ?
  217. ripple values in B+ supply
  218. Capacitors and tubes for AA5?
  219. Dynaco PAS Rebuild
  220. Audio Research SP9 Circuit Diagram HELP!
  221. ARC reference II schematic
  222. 71a Line Stage and Miller Capacitance
  223. Low plate voltage pentode (<40v) for diff pair?
  224. loadlines for newbie.
  225. Measuring approx RMS power O/P
  226. Hybrid Aikido-ish gain stage
  227. Loftin-White coupling Questions
  228. 807 screen regulation
  229. What kills an opt tranny?
  230. EAR529 schematic diagram
  231. World Designs KEL84 Valve Amplifier
  232. what 300B design would you recommend but...
  233. Replacement conductance meter for Hickok 533A
  234. My RIAA Phono Stage Project
  235. A2 Questions
  236. World Audio Design
  237. Seek for your comments/advice to newbie on Tube world
  238. CCSed LTP validity?
  239. Suitability of transmitter tubes for musical amplifiers
  240. Anyone using an 813 in pentode?
  241. Electrolytic in the feedback loop
  242. El34 PP Vs. El34 PSE
  243. RIAA Phono Amp Design
  244. Matching resistors to 1% or Better
  245. Wirewound cathode resistor
  246. Tube Hybrid Amp.
  247. Nasty ground loop
  248. ECC88 Class B
  249. Old Tube Amp Servicer In Nj???
  250. Vg-k max

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