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  1. 33 Power Pentode Design Pointers Needed
  2. What Wiki?
  3. help understanding updated DRD from J Elliano's site (using 6AN4 instead of 6n1p)
  4. Zen SE84TS
  5. 5687 tube
  6. Tube vs. Semiconducter rectification
  7. Bogen CHB35 Mods and Preamp ideas
  8. I Want To Build A 100+Watt per/channel Tube Poweramp
  9. Phonodude problem
  10. enjoythemusic's t-rex amp: where is the +70VDC tap?
  11. Earthing and how it effects sound.
  12. 6D22S Getter Question
  13. Repair of a McIntosh MC225 power amp
  14. OPA627 with tube buffer....
  15. Bell Stereophonic 3030 help
  16. Choosing the line stage preamp.
  17. I Need Help, Mcintosh/Marantz 7 content
  18. For 45 > 845: selecting an 9.5/ 10 Interstage
  19. How to reduce gain of this Tube Preamplifier ?
  20. looking for pp amp schematic without nfb
  21. Pseudo dual mono PS?
  22. WE404A drive 6L6 solution
  23. Looking for info on loudness control
  24. Tubes and minority carriers
  25. suggestions for 3 projects please
  26. DIY tube preamp kit
  27. M6 lamination: what is it?
  28. why is it that most tube projects uses copper sheetmetal?
  29. Sources in the Philippines / Manila
  30. Tube noise - Help
  31. Tiny tube amp
  32. DC heating directly heated output valves
  33. Alps 250k in a Pas-3 Question
  34. 1st cap heats up...
  35. RCA VR Tube engineering data
  36. dropping heater voltage
  37. Please Help with Sound Valves M40 Monoblock Bias Adjustment Procedure!!!
  38. Old Sony SE OPT's /w 600r tap... cathode feedback maybe?
  39. Which is the poor man 45 tube?
  40. Audio Note Low Gain Quest Power Amplifier
  41. Quad II: Which resistors?
  42. Designing a preamp with two tubes
  43. ARC Classic 30 problem
  44. Why does the 6AS7 have such high Miller capacitance ?
  45. serching 5A6 beam power pentode data/curves/schematics for AF practice amp
  46. DHT Topology Comparison Question
  47. Secondary Tap of Power Transformer?
  48. Soft-clipping Circuit/tubecad
  49. lack of bass in a 6h30 design
  50. Difference between two novals
  51. C3g
  52. All Tube Stereo power amplifier
  53. what gas VR tube?
  54. KT88 schematic
  55. Help me understand the topologies here...
  56. Finished my Amp, Need to build a PS
  57. Push-Pull driver stage?
  58. Floating the heaters
  59. Replacing Power Transformer
  60. When car audio & tubes collide...
  61. 6N6P and 6SN7 Operating point suggestions
  62. NOS pF capacitors voltage rating?
  63. Tubes in Vietnam
  64. Passive pre order?
  65. layout help
  66. junkbox amp help
  67. required specs of an input step up transformer, into a 45, to allow it drive an 845
  68. 6as7 SRPP output stage
  69. OTL's and aircraft transformers
  70. PSE EL34 - valve rectification question
  71. A 2a3 Amplifier
  72. James Transformer BS
  73. Plate Voltage on 12ax7a
  74. Parallel Triodes and Load Lines
  75. Steve Bench OTL
  76. High power P-P EL34/6550/KT88 amp suggestions
  77. Stepped attenuators - break before make?
  78. audionote 144 OPT comment pls...
  79. KT88 and Hammond Transformer Schematics
  80. How do I know that my measured AC voltage is precise?
  81. 6C33B-C push pull with output transformer
  82. EL84 grid voltage?
  83. Mysterious tektronix power supply
  84. tube amp subwoofer hum problem
  85. 4654/4699 pentodes
  86. vacuum tube logic gate
  87. Screen current
  88. Any tube-sleuths out there know who made these Daystrom tubes?
  89. With this meter reading, enough to know Fuse is the culprit?
  90. need comments on amp design
  91. KEF/Celestion speakers for tube use...
  92. Another cheap fix - MOT as plate choke.
  93. XAM Mark II B
  94. Audio innovation L1 valve replacement
  95. TETRODE amplifiers
  96. Audio Shop Eifl Corporation
  97. 6sn7 Buffer
  98. Marantz 8b operating voltages
  99. amplifier with 813 valves
  100. Changing plate resistor in live circuitry.
  101. 2xEL34 vs. 4xEL84 vs. 2x6L6 vs. 4x6V6
  102. KT88 drivers
  103. Simple Hybrid SE EL84 UL amp.. comments please.
  104. max input impedance for // el84's and other ?
  105. Please Help.. PCL81
  106. Some troubles with PSUD. A little help please !
  107. Why D getters?
  108. Help me information of the tubes?
  109. Questions about this line stage
  110. Need help from Aikido builder
  111. Aikesi賍机el34尋找國外代理,可以送一台!!
  112. Direct heating triodes are really better?
  113. Audio Reality is back, in digital format
  114. Stoetkit 25W integrated amp
  115. Tube Pre Amplifier for SEWA 7 Watt ClassA MOSFET
  116. Michaelson Audio Odysseus Problem.
  117. anyone living in australia (hopefully adelaide) willing to lend their puncher/bit?
  118. ReinoutdV
  119. Priboj amp schematic
  120. EL84 in ultra-linear mode
  121. internal shielding
  122. RIAA: what does it stand for?
  123. heathkit sa2 - new question
  124. RCA R35, 39 & 57 Terminal Usage...
  125. 45 into an 845 parafeed circuit
  126. Tubes power supply 220 t0 300V ?
  127. ripple values in B+ supply
  128. Capacitors and tubes for AA5?
  129. Dynaco PAS Rebuild
  130. Audio Research SP9 Circuit Diagram HELP!
  131. ARC reference II schematic
  132. 71a Line Stage and Miller Capacitance
  133. Low plate voltage pentode (<40v) for diff pair?
  134. loadlines for newbie.
  135. Measuring approx RMS power O/P
  136. Hybrid Aikido-ish gain stage
  137. Loftin-White coupling Questions
  138. 807 screen regulation
  139. What kills an opt tranny?
  140. EAR529 schematic diagram
  141. World Designs KEL84 Valve Amplifier
  142. what 300B design would you recommend but...
  143. My RIAA Phono Stage Project
  144. A2 Questions
  145. World Audio Design
  146. Seek for your comments/advice to newbie on Tube world
  147. CCSed LTP validity?
  148. Suitability of transmitter tubes for musical amplifiers
  149. Anyone using an 813 in pentode?
  150. Electrolytic in the feedback loop
  151. El34 PP Vs. El34 PSE
  152. RIAA Phono Amp Design
  153. Matching resistors to 1% or Better
  154. Wirewound cathode resistor
  155. Tube Hybrid Amp.
  156. Nasty ground loop
  157. ECC88 Class B
  158. Old Tube Amp Servicer In Nj???
  159. Vg-k max
  160. Anyone used PT15 / VT104 ?
  161. rebuild a Musical Fidelity X-10D ??
  162. Transformer Building
  163. Identifying weird signal transformer
  164. 100watt mono blocks
  165. Resistor combination calculator - RESCALC
  166. Aikido choice of valves (or tubes, if you will)
  167. Pin 9 on 6n6P, 6H30, etc
  168. Croft Super Micro meets Acoustat TNT200
  169. tube mic preamp kit??
  170. The SACD Meets Tubes
  171. Useful Abbreviations
  172. One B+ for the both driver and output tube if they are identical?
  173. Fisher 500B Schematic Question
  174. SE Output Transfromers Question
  175. Amplifier Project
  176. Grid Stopper for parallel sides of dual triode
  177. centre tap or floating heaters?
  178. Converting 6.3V to 6.3VCT Quick questions
  179. Russian Nuvistors...Anyone tried them?
  180. 一台300bc胆机,大家给点意见,谢谢
  181. Australian Amp Manufacturers
  182. Old radio quick question re PS
  183. Kt90 Pse
  184. Velleman K4040 is Always Blowing Output Tubes
  185. looking for transformer with the following specs?
  186. 5686 amplifier schematic
  187. Heaters for cathodes with a large swing
  188. 6DJ8 as phase splitter.
  189. New driver for SE 2A3
  190. I磛e made a Mu stage with 6888 and 6C45...
  191. Quick urgent Help plz !
  192. Cheap SET Kit for UK
  193. How can I change bias 6H30pi tube
  194. DHT heater voltage
  195. Ok SY...You Win
  196. Input level required- PP KT88
  197. SE 6C33C-B ; preview of a new Baby
  198. 2A3 grid DC voltage
  199. Dyna ST70 experience bypassing input tubes
  200. [Theory] Amplifier efficiency
  201. Pentode Cascode CCS
  202. Noval Relay
  203. Where to buy 6A5G ?
  204. AC or grounded DC for heater?
  205. EM84 based VUmeter "lines" don't go to zero
  206. 'scoping tube amps
  207. Preferred operating points of small signal triodes
  208. Is the Nuvistor Better Than The 12B4 For A Line Stage
  209. audio research schematics
  210. Looking to put the entire (last edition) RCA and Sylvania books online
  211. 5693 as a phono preamp?
  212. Audible Illusions Dual Mono Preamplifier
  213. should the filaments be already hot before the B+ is applied or
  214. One Electron vs. Transcendar
  215. &quot;Y&quot; caps? current bleed?
  216. I made a 200W tube amp!
  217. Power amp kit for a complete newbie
  218. Confused, datasheet of 417A/5842
  219. Audio Amp Project
  220. Neutrik XLR for Umbilical
  221. Primary Impedance
  222. Need help for HV section Design
  223. power amp kit recommendations
  224. 6N6P vs 5687
  225. Triode spice models for Circuit maker
  226. My ARC D70 get trouble
  227. when using PSUD2, do you...
  228. Depression... and a plea for help!!!
  229. Weston 981 Type 3 schematic and parts list needed
  230. 3W 6C33B-C SE OTL schematics ready
  231. Batory tubes, anyone familiar with these?
  232. Musical Pre-amp topology needed. Interstages please apply!
  233. Tube power Amp matching with SAE Mark M pre amp and AR18 speaker or MS 25i
  234. PowerDrive Circuit for 805 (+ve grid bias)
  235. Alternate spice models
  236. Is this heater supply OK?
  237. Basic RC Value Question
  238. Hookup powersubwoofer to a tube receiver.
  239. Transformer question RE; connections on phono stage
  240. Rectifier Tubes Data - Quick Sheet
  241. Which cabling to use?
  242. Need 396A/6N3P/2C51/407A spice model
  243. Antek Toroidal Power Transformers
  244. HT stands for???
  245. Is it possible to hook up 6c33 plate in parallel
  246. Help eliminating hum
  247. Tube LTP CCS?
  248. Trancsendar Transformers
  249. Hafler/Keroes 6L6 UL
  250. hum

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