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  1. Bias range and selenium rectifier
  2. OTL's and aircraft transformers
  3. PSE EL34 - valve rectification question
  4. A 2a3 Amplifier
  5. James Transformer BS
  6. Plate Voltage on 12ax7a
  7. Parallel Triodes and Load Lines
  8. Steve Bench OTL
  9. High power P-P EL34/6550/KT88 amp suggestions
  10. Stepped attenuators - break before make?
  11. audionote 144 OPT comment pls...
  12. KT88 and Hammond Transformer Schematics
  13. How do I know that my measured AC voltage is precise?
  14. 6C33B-C push pull with output transformer
  15. EL84 grid voltage?
  16. seperate power supply?
  17. Mysterious tektronix power supply
  18. tube amp subwoofer hum problem
  19. How to test transformer's current rating?
  20. Death/Black Metal sound on Crate 6212
  21. 4654/4699 pentodes
  22. Output tubes on a Marshall JCM900
  23. vacuum tube logic gate
  24. Screen current
  25. Any tube-sleuths out there know who made these Daystrom tubes?
  26. With this meter reading, enough to know Fuse is the culprit?
  27. need comments on amp design
  28. KEF/Celestion speakers for tube use...
  29. Another cheap fix - MOT as plate choke.
  30. XAM Mark II B
  31. How to test voltages on secondaries?
  32. Audio innovation L1 valve replacement
  33. Is this in-rush current?
  34. TETRODE amplifiers
  35. Audio Shop Eifl Corporation
  36. 6sn7 Buffer
  37. Marantz 8b operating voltages
  38. amplifier with 813 valves
  39. Changing plate resistor in live circuitry.
  40. 2xEL34 vs. 4xEL84 vs. 2x6L6 vs. 4x6V6
  41. KT88 drivers
  42. Simple Hybrid SE EL84 UL amp.. comments please.
  43. max input impedance for // el84's and other ?
  44. Please Help.. PCL81
  45. Some troubles with PSUD. A little help please !
  46. Why D getters?
  47. Help me information of the tubes?
  48. Questions about this line stage
  49. 5Z4P rectifier tube question
  50. Need help from Aikido builder
  51. Aikesi賍机el34尋找國外代理,可以送一台!!
  52. Direct heating triodes are really better?
  53. Audio Reality is back, in digital format
  54. Stoetkit 25W integrated amp
  55. Switchable stages with Tubelab抯 hybrid MOSFET/ 845 SE amp?
  56. Tube Pre Amplifier for SEWA 7 Watt ClassA MOSFET
  57. Michaelson Audio Odysseus Problem.
  58. ASC metal can polypro caps: ground the metal can to AC ground?
  59. anyone living in australia (hopefully adelaide) willing to lend their puncher/bit?
  60. ReinoutdV
  61. Priboj amp schematic
  62. EL84 in ultra-linear mode
  63. internal shielding
  64. RIAA: what does it stand for?
  65. Socket Mounting Rings
  66. heathkit sa2 - new question
  67. RCA R35, 39 & 57 Terminal Usage...
  68. 45 into an 845 parafeed circuit
  69. Tubes power supply 220 t0 300V ?
  70. ripple values in B+ supply
  71. Capacitors and tubes for AA5?
  72. Dynaco PAS Rebuild
  73. Audio Research SP9 Circuit Diagram HELP!
  74. ARC reference II schematic
  75. 71a Line Stage and Miller Capacitance
  76. Low plate voltage pentode (<40v) for diff pair?
  77. loadlines for newbie.
  78. Measuring approx RMS power O/P
  79. Hybrid Aikido-ish gain stage
  80. Loftin-White coupling Questions
  81. 807 screen regulation
  82. What kills an opt tranny?
  83. EAR529 schematic diagram
  84. World Designs KEL84 Valve Amplifier
  85. what 300B design would you recommend but...
  86. Replacement conductance meter for Hickok 533A
  87. My RIAA Phono Stage Project
  88. A2 Questions
  89. World Audio Design
  90. Seek for your comments/advice to newbie on Tube world
  91. CCSed LTP validity?
  92. Suitability of transmitter tubes for musical amplifiers
  93. Anyone using an 813 in pentode?
  94. Electrolytic in the feedback loop
  95. El34 PP Vs. El34 PSE
  96. RIAA Phono Amp Design
  97. Matching resistors to 1% or Better
  98. Wirewound cathode resistor
  99. Tube Hybrid Amp.
  100. Nasty ground loop
  101. ECC88 Class B
  102. Cree diodes
  103. Old Tube Amp Servicer In Nj???
  104. Vg-k max
  105. Anyone used PT15 / VT104 ?
  106. rebuild a Musical Fidelity X-10D ??
  107. Transformer Building
  108. Identifying weird signal transformer
  109. 100watt mono blocks
  110. Resistor combination calculator - RESCALC
  111. Aikido choice of valves (or tubes, if you will)
  112. Pin 9 on 6n6P, 6H30, etc
  113. Croft Super Micro meets Acoustat TNT200
  114. tube mic preamp kit??
  115. The SACD Meets Tubes
  116. Useful Abbreviations
  117. cap value for 6X4 rectifier?
  118. One B+ for the both driver and output tube if they are identical?
  119. Fisher 500B Schematic Question
  120. SE Output Transfromers Question
  121. Amplifier Project
  122. Grid Stopper for parallel sides of dual triode
  123. centre tap or floating heaters?
  124. Converting 6.3V to 6.3VCT Quick questions
  125. Russian Nuvistors...Anyone tried them?
  126. 一台300bc胆机,大家给点意见,谢谢
  127. Australian Amp Manufacturers
  128. Old radio quick question re PS
  129. Kt90 Pse
  130. Velleman K4040 is Always Blowing Output Tubes
  131. looking for transformer with the following specs?
  132. 5686 amplifier schematic
  133. Heaters for cathodes with a large swing
  134. 6DJ8 as phase splitter.
  135. New driver for SE 2A3
  136. I磛e made a Mu stage with 6888 and 6C45...
  137. Quick urgent Help plz !
  138. Cheap SET Kit for UK
  139. How can I change bias 6H30pi tube
  140. DHT heater voltage
  141. Ok SY...You Win
  142. Input level required- PP KT88
  143. SE 6C33C-B ; preview of a new Baby
  144. 2A3 grid DC voltage
  145. Dyna ST70 experience bypassing input tubes
  146. [Theory] Amplifier efficiency
  147. Pentode Cascode CCS
  148. Noval Relay
  149. Where to buy 6A5G ?
  150. AC or grounded DC for heater?
  151. EM84 based VUmeter "lines" don't go to zero
  152. 'scoping tube amps
  153. Preferred operating points of small signal triodes
  154. Is the Nuvistor Better Than The 12B4 For A Line Stage
  155. audio research schematics
  156. Looking to put the entire (last edition) RCA and Sylvania books online
  157. 5693 as a phono preamp?
  158. Audible Illusions Dual Mono Preamplifier
  159. should the filaments be already hot before the B+ is applied or
  160. One Electron vs. Transcendar
  161. &quot;Y&quot; caps? current bleed?
  162. I made a 200W tube amp!
  163. Power amp kit for a complete newbie
  164. Confused, datasheet of 417A/5842
  165. Audio Amp Project
  166. Tube tester settings?
  167. Neutrik XLR for Umbilical
  168. Primary Impedance
  169. Need help for HV section Design
  170. power amp kit recommendations
  171. 6N6P vs 5687
  172. Triode spice models for Circuit maker
  173. My ARC D70 get trouble
  174. when using PSUD2, do you...
  175. Depression... and a plea for help!!!
  176. Weston 981 Type 3 schematic and parts list needed
  177. 3W 6C33B-C SE OTL schematics ready
  178. Batory tubes, anyone familiar with these?
  179. Musical Pre-amp topology needed. Interstages please apply!
  180. Tube power Amp matching with SAE Mark M pre amp and AR18 speaker or MS 25i
  181. PowerDrive Circuit for 805 (+ve grid bias)
  182. Alternate spice models
  183. Is this heater supply OK?
  184. Basic RC Value Question
  185. Hookup powersubwoofer to a tube receiver.
  186. Transformer question RE; connections on phono stage
  187. Rectifier Tubes Data - Quick Sheet
  188. Now This is A Tube Guitar Amp!!
  189. Which cabling to use?
  190. Need 396A/6N3P/2C51/407A spice model
  191. Antek Toroidal Power Transformers
  192. HT stands for???
  193. Is it possible to hook up 6c33 plate in parallel
  194. Help eliminating hum
  195. Tube LTP CCS?
  196. Trancsendar Transformers
  197. Hafler/Keroes 6L6 UL
  198. hum
  199. Leads for ISCO PS?
  200. Negative Feedback Bogen CHB100
  201. TubeCad's Hybrid amp question
  202. Cathode bias resistor value for 6SN7?
  203. El84 2-Channel Mono Blocks
  204. Tube Design Books
  205. Interesting Williamson article..
  206. Locating Preamp Output Transformers
  207. Plate characteristics
  208. How do you finance A Great DIY Audio Amp?
  209. 808 Se
  210. Parafeed doubt
  211. A little research: old tube amps from the past
  212. RCA Victor stereo cabinet amp-newb question
  213. Transformer temperature?
  214. switch in SPICE
  215. Using a standard pentode-tetrode as output "space-charge tube" any ideas-experiences?
  216. Tube testers which is the best?
  217. finished !!!
  218. Transformer Leg Connection Question
  219. simple ccs under 5-10mA ?
  220. Curcio Sarah Phono stage: opinions?
  221. suggest a KT88 SE to build
  222. Transformer potting material??
  223. Jan E Veiset Mini EL84 pp
  224. Some questions on non common things
  225. basic question on plate curves
  226. Euro barrier strip palace
  227. ARC D90 needs new electrolytics
  228. 5763 Triode Strapped
  229. Recommend me some transformers for a PP EL84
  230. grid LED bias?
  231. Help on tube socket
  232. Taking CFB to the extremes...?
  233. Output section impedance change query
  234. Tube Suggestions
  235. 82 Popped
  236. OPT Project for EL84 SE
  237. Interesting eBay "listing" for tube amp
  238. How to chose the right choke
  239. Eco warrior thinking of jumping ship !!!
  240. HELP! Cathode bypass caps keep going...
  241. Best Operating point for a 2A3?
  242. Need help with preamp
  243. Best place to buy valves and components?
  244. Replacing cathode resistors of Aikido 1st stage (or other SRPP circuit) with chokes
  245. Circuit calculations
  246. Finally going to give my TVC/active preamp a real home...
  247. Suggestion on the input transformer for tube preamp
  248. sylvania & GE tubes
  249. SE Amplifier
  250. "fisss" on the 6C33C-pp

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