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

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