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  1. what gas VR tube?
  2. KT88 schematic
  3. Help me understand the topologies here...
  4. Finished my Amp, Need to build a PS
  5. Push-Pull driver stage?
  6. Floating the heaters
  7. Replacing Power Transformer
  8. When car audio & tubes collide...
  9. 6N6P and 6SN7 Operating point suggestions
  10. NOS pF capacitors voltage rating?
  11. Tubes in Vietnam
  12. Passive pre order?
  13. layout help
  14. junkbox amp help
  15. required specs of an input step up transformer, into a 45, to allow it drive an 845
  16. 6as7 SRPP output stage
  17. Bias range and selenium rectifier
  18. OTL's and aircraft transformers
  19. PSE EL34 - valve rectification question
  20. A 2a3 Amplifier
  21. James Transformer BS
  22. Plate Voltage on 12ax7a
  23. Parallel Triodes and Load Lines
  24. Steve Bench OTL
  25. High power P-P EL34/6550/KT88 amp suggestions
  26. Stepped attenuators - break before make?
  27. audionote 144 OPT comment pls...
  28. KT88 and Hammond Transformer Schematics
  29. How do I know that my measured AC voltage is precise?
  30. 6C33B-C push pull with output transformer
  31. EL84 grid voltage?
  32. seperate power supply?
  33. Mysterious tektronix power supply
  34. tube amp subwoofer hum problem
  35. How to test transformer's current rating?
  36. Death/Black Metal sound on Crate 6212
  37. 4654/4699 pentodes
  38. Output tubes on a Marshall JCM900
  39. vacuum tube logic gate
  40. Screen current
  41. Any tube-sleuths out there know who made these Daystrom tubes?
  42. With this meter reading, enough to know Fuse is the culprit?
  43. need comments on amp design
  44. KEF/Celestion speakers for tube use...
  45. Another cheap fix - MOT as plate choke.
  46. XAM Mark II B
  47. How to test voltages on secondaries?
  48. Audio innovation L1 valve replacement
  49. Is this in-rush current?
  50. TETRODE amplifiers
  51. Audio Shop Eifl Corporation
  52. 6sn7 Buffer
  53. Marantz 8b operating voltages
  54. amplifier with 813 valves
  55. Changing plate resistor in live circuitry.
  56. 2xEL34 vs. 4xEL84 vs. 2x6L6 vs. 4x6V6
  57. KT88 drivers
  58. Simple Hybrid SE EL84 UL amp.. comments please.
  59. max input impedance for // el84's and other ?
  60. Please Help.. PCL81
  61. Some troubles with PSUD. A little help please !
  62. Why D getters?
  63. Help me information of the tubes?
  64. Questions about this line stage
  65. 5Z4P rectifier tube question
  66. Need help from Aikido builder
  67. Aikesi賍机el34尋找國外代理,可以送一台!!
  68. Direct heating triodes are really better?
  69. Audio Reality is back, in digital format
  70. Stoetkit 25W integrated amp
  71. Switchable stages with Tubelab抯 hybrid MOSFET/ 845 SE amp?
  72. Tube Pre Amplifier for SEWA 7 Watt ClassA MOSFET
  73. Michaelson Audio Odysseus Problem.
  74. ASC metal can polypro caps: ground the metal can to AC ground?
  75. anyone living in australia (hopefully adelaide) willing to lend their puncher/bit?
  76. ReinoutdV
  77. Priboj amp schematic
  78. EL84 in ultra-linear mode
  79. internal shielding
  80. RIAA: what does it stand for?
  81. Socket Mounting Rings
  82. heathkit sa2 - new question
  83. RCA R35, 39 & 57 Terminal Usage...
  84. 45 into an 845 parafeed circuit
  85. Tubes power supply 220 t0 300V ?
  86. ripple values in B+ supply
  87. Capacitors and tubes for AA5?
  88. Dynaco PAS Rebuild
  89. Audio Research SP9 Circuit Diagram HELP!
  90. ARC reference II schematic
  91. 71a Line Stage and Miller Capacitance
  92. Low plate voltage pentode (<40v) for diff pair?
  93. loadlines for newbie.
  94. Measuring approx RMS power O/P
  95. Hybrid Aikido-ish gain stage
  96. Loftin-White coupling Questions
  97. 807 screen regulation
  98. What kills an opt tranny?
  99. EAR529 schematic diagram
  100. World Designs KEL84 Valve Amplifier
  101. what 300B design would you recommend but...
  102. Replacement conductance meter for Hickok 533A
  103. My RIAA Phono Stage Project
  104. A2 Questions
  105. World Audio Design
  106. Seek for your comments/advice to newbie on Tube world
  107. CCSed LTP validity?
  108. Suitability of transmitter tubes for musical amplifiers
  109. Anyone using an 813 in pentode?
  110. Electrolytic in the feedback loop
  111. El34 PP Vs. El34 PSE
  112. RIAA Phono Amp Design
  113. Matching resistors to 1% or Better
  114. Wirewound cathode resistor
  115. Tube Hybrid Amp.
  116. Nasty ground loop
  117. ECC88 Class B
  118. Cree diodes
  119. Old Tube Amp Servicer In Nj???
  120. Vg-k max
  121. Anyone used PT15 / VT104 ?
  122. rebuild a Musical Fidelity X-10D ??
  123. Transformer Building
  124. Identifying weird signal transformer
  125. 100watt mono blocks
  126. Resistor combination calculator - RESCALC
  127. Aikido choice of valves (or tubes, if you will)
  128. Pin 9 on 6n6P, 6H30, etc
  129. Croft Super Micro meets Acoustat TNT200
  130. tube mic preamp kit??
  131. The SACD Meets Tubes
  132. Useful Abbreviations
  133. cap value for 6X4 rectifier?
  134. One B+ for the both driver and output tube if they are identical?
  135. Fisher 500B Schematic Question
  136. SE Output Transfromers Question
  137. Amplifier Project
  138. Grid Stopper for parallel sides of dual triode
  139. centre tap or floating heaters?
  140. Converting 6.3V to 6.3VCT Quick questions
  141. Russian Nuvistors...Anyone tried them?
  142. 一台300bc胆机,大家给点意见,谢谢
  143. Australian Amp Manufacturers
  144. Old radio quick question re PS
  145. Kt90 Pse
  146. Velleman K4040 is Always Blowing Output Tubes
  147. looking for transformer with the following specs?
  148. 5686 amplifier schematic
  149. Heaters for cathodes with a large swing
  150. 6DJ8 as phase splitter.
  151. New driver for SE 2A3
  152. I磛e made a Mu stage with 6888 and 6C45...
  153. Quick urgent Help plz !
  154. Cheap SET Kit for UK
  155. How can I change bias 6H30pi tube
  156. DHT heater voltage
  157. Ok SY...You Win
  158. Input level required- PP KT88
  159. SE 6C33C-B ; preview of a new Baby
  160. 2A3 grid DC voltage
  161. Dyna ST70 experience bypassing input tubes
  162. [Theory] Amplifier efficiency
  163. Pentode Cascode CCS
  164. Noval Relay
  165. Where to buy 6A5G ?
  166. AC or grounded DC for heater?
  167. EM84 based VUmeter "lines" don't go to zero
  168. 'scoping tube amps
  169. Preferred operating points of small signal triodes
  170. Is the Nuvistor Better Than The 12B4 For A Line Stage
  171. audio research schematics
  172. Looking to put the entire (last edition) RCA and Sylvania books online
  173. 5693 as a phono preamp?
  174. Audible Illusions Dual Mono Preamplifier
  175. should the filaments be already hot before the B+ is applied or
  176. One Electron vs. Transcendar
  177. &quot;Y&quot; caps? current bleed?
  178. I made a 200W tube amp!
  179. Power amp kit for a complete newbie
  180. Confused, datasheet of 417A/5842
  181. Audio Amp Project
  182. Tube tester settings?
  183. Neutrik XLR for Umbilical
  184. Primary Impedance
  185. Need help for HV section Design
  186. power amp kit recommendations
  187. 6N6P vs 5687
  188. Triode spice models for Circuit maker
  189. My ARC D70 get trouble
  190. when using PSUD2, do you...
  191. Depression... and a plea for help!!!
  192. Weston 981 Type 3 schematic and parts list needed
  193. 3W 6C33B-C SE OTL schematics ready
  194. Batory tubes, anyone familiar with these?
  195. Musical Pre-amp topology needed. Interstages please apply!
  196. Tube power Amp matching with SAE Mark M pre amp and AR18 speaker or MS 25i
  197. PowerDrive Circuit for 805 (+ve grid bias)
  198. Alternate spice models
  199. Is this heater supply OK?
  200. Basic RC Value Question
  201. Hookup powersubwoofer to a tube receiver.
  202. Transformer question RE; connections on phono stage
  203. Rectifier Tubes Data - Quick Sheet
  204. Now This is A Tube Guitar Amp!!
  205. Which cabling to use?
  206. Need 396A/6N3P/2C51/407A spice model
  207. Antek Toroidal Power Transformers
  208. HT stands for???
  209. Is it possible to hook up 6c33 plate in parallel
  210. Help eliminating hum
  211. Tube LTP CCS?
  212. Trancsendar Transformers
  213. Hafler/Keroes 6L6 UL
  214. hum
  215. Leads for ISCO PS?
  216. Negative Feedback Bogen CHB100
  217. TubeCad's Hybrid amp question
  218. Cathode bias resistor value for 6SN7?
  219. El84 2-Channel Mono Blocks
  220. Tube Design Books
  221. Interesting Williamson article..
  222. Locating Preamp Output Transformers
  223. Plate characteristics
  224. How do you finance A Great DIY Audio Amp?
  225. 808 Se
  226. Parafeed doubt
  227. A little research: old tube amps from the past
  228. RCA Victor stereo cabinet amp-newb question
  229. Transformer temperature?
  230. switch in SPICE
  231. Using a standard pentode-tetrode as output "space-charge tube" any ideas-experiences?
  232. Tube testers which is the best?
  233. finished !!!
  234. Transformer Leg Connection Question
  235. simple ccs under 5-10mA ?
  236. Curcio Sarah Phono stage: opinions?
  237. suggest a KT88 SE to build
  238. Transformer potting material??
  239. Jan E Veiset Mini EL84 pp
  240. Some questions on non common things
  241. basic question on plate curves
  242. Euro barrier strip palace
  243. ARC D90 needs new electrolytics
  244. 5763 Triode Strapped
  245. Recommend me some transformers for a PP EL84
  246. grid LED bias?
  247. Help on tube socket
  248. Taking CFB to the extremes...?
  249. Output section impedance change query
  250. Tube Suggestions

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