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  1. Difference between two novals
  2. C3g
  3. All Tube Stereo power amplifier
  4. what gas VR tube?
  5. KT88 schematic
  6. Help me understand the topologies here...
  7. Finished my Amp, Need to build a PS
  8. Push-Pull driver stage?
  9. Floating the heaters
  10. Replacing Power Transformer
  11. When car audio & tubes collide...
  12. 6N6P and 6SN7 Operating point suggestions
  13. NOS pF capacitors voltage rating?
  14. Tubes in Vietnam
  15. Passive pre order?
  16. layout help
  17. junkbox amp help
  18. required specs of an input step up transformer, into a 45, to allow it drive an 845
  19. 6as7 SRPP output stage
  20. Bias range and selenium rectifier
  21. OTL's and aircraft transformers
  22. PSE EL34 - valve rectification question
  23. A 2a3 Amplifier
  24. James Transformer BS
  25. Plate Voltage on 12ax7a
  26. Parallel Triodes and Load Lines
  27. Steve Bench OTL
  28. High power P-P EL34/6550/KT88 amp suggestions
  29. Stepped attenuators - break before make?
  30. audionote 144 OPT comment pls...
  31. KT88 and Hammond Transformer Schematics
  32. How do I know that my measured AC voltage is precise?
  33. 6C33B-C push pull with output transformer
  34. EL84 grid voltage?
  35. seperate power supply?
  36. Mysterious tektronix power supply
  37. tube amp subwoofer hum problem
  38. How to test transformer's current rating?
  39. Death/Black Metal sound on Crate 6212
  40. 4654/4699 pentodes
  41. Output tubes on a Marshall JCM900
  42. vacuum tube logic gate
  43. Screen current
  44. Any tube-sleuths out there know who made these Daystrom tubes?
  45. With this meter reading, enough to know Fuse is the culprit?
  46. need comments on amp design
  47. KEF/Celestion speakers for tube use...
  48. Another cheap fix - MOT as plate choke.
  49. XAM Mark II B
  50. How to test voltages on secondaries?
  51. Audio innovation L1 valve replacement
  52. Is this in-rush current?
  53. TETRODE amplifiers
  54. Audio Shop Eifl Corporation
  55. 6sn7 Buffer
  56. Marantz 8b operating voltages
  57. amplifier with 813 valves
  58. Changing plate resistor in live circuitry.
  59. 2xEL34 vs. 4xEL84 vs. 2x6L6 vs. 4x6V6
  60. KT88 drivers
  61. Simple Hybrid SE EL84 UL amp.. comments please.
  62. max input impedance for // el84's and other ?
  63. Please Help.. PCL81
  64. Some troubles with PSUD. A little help please !
  65. Why D getters?
  66. Help me information of the tubes?
  67. Questions about this line stage
  68. 5Z4P rectifier tube question
  69. Need help from Aikido builder
  70. Aikesi賍机el34尋找國外代理,可以送一台!!
  71. Direct heating triodes are really better?
  72. Audio Reality is back, in digital format
  73. Stoetkit 25W integrated amp
  74. Switchable stages with Tubelab抯 hybrid MOSFET/ 845 SE amp?
  75. Tube Pre Amplifier for SEWA 7 Watt ClassA MOSFET
  76. Michaelson Audio Odysseus Problem.
  77. ASC metal can polypro caps: ground the metal can to AC ground?
  78. anyone living in australia (hopefully adelaide) willing to lend their puncher/bit?
  79. ReinoutdV
  80. Priboj amp schematic
  81. EL84 in ultra-linear mode
  82. internal shielding
  83. RIAA: what does it stand for?
  84. Socket Mounting Rings
  85. heathkit sa2 - new question
  86. RCA R35, 39 & 57 Terminal Usage...
  87. 45 into an 845 parafeed circuit
  88. Tubes power supply 220 t0 300V ?
  89. ripple values in B+ supply
  90. Capacitors and tubes for AA5?
  91. Dynaco PAS Rebuild
  92. Audio Research SP9 Circuit Diagram HELP!
  93. ARC reference II schematic
  94. 71a Line Stage and Miller Capacitance
  95. Low plate voltage pentode (<40v) for diff pair?
  96. loadlines for newbie.
  97. Measuring approx RMS power O/P
  98. Hybrid Aikido-ish gain stage
  99. Loftin-White coupling Questions
  100. 807 screen regulation
  101. What kills an opt tranny?
  102. EAR529 schematic diagram
  103. World Designs KEL84 Valve Amplifier
  104. what 300B design would you recommend but...
  105. Replacement conductance meter for Hickok 533A
  106. My RIAA Phono Stage Project
  107. A2 Questions
  108. World Audio Design
  109. Seek for your comments/advice to newbie on Tube world
  110. CCSed LTP validity?
  111. Suitability of transmitter tubes for musical amplifiers
  112. Anyone using an 813 in pentode?
  113. Electrolytic in the feedback loop
  114. El34 PP Vs. El34 PSE
  115. RIAA Phono Amp Design
  116. Matching resistors to 1% or Better
  117. Wirewound cathode resistor
  118. Tube Hybrid Amp.
  119. Nasty ground loop
  120. ECC88 Class B
  121. Cree diodes
  122. Old Tube Amp Servicer In Nj???
  123. Vg-k max
  124. Anyone used PT15 / VT104 ?
  125. rebuild a Musical Fidelity X-10D ??
  126. Transformer Building
  127. Identifying weird signal transformer
  128. 100watt mono blocks
  129. Resistor combination calculator - RESCALC
  130. Aikido choice of valves (or tubes, if you will)
  131. Pin 9 on 6n6P, 6H30, etc
  132. Croft Super Micro meets Acoustat TNT200
  133. tube mic preamp kit??
  134. The SACD Meets Tubes
  135. Useful Abbreviations
  136. cap value for 6X4 rectifier?
  137. One B+ for the both driver and output tube if they are identical?
  138. Fisher 500B Schematic Question
  139. SE Output Transfromers Question
  140. Amplifier Project
  141. Grid Stopper for parallel sides of dual triode
  142. centre tap or floating heaters?
  143. Converting 6.3V to 6.3VCT Quick questions
  144. Russian Nuvistors...Anyone tried them?
  145. 一台300bc胆机,大家给点意见,谢谢
  146. Australian Amp Manufacturers
  147. Old radio quick question re PS
  148. Kt90 Pse
  149. Velleman K4040 is Always Blowing Output Tubes
  150. looking for transformer with the following specs?
  151. 5686 amplifier schematic
  152. Heaters for cathodes with a large swing
  153. 6DJ8 as phase splitter.
  154. New driver for SE 2A3
  155. I磛e made a Mu stage with 6888 and 6C45...
  156. Quick urgent Help plz !
  157. Cheap SET Kit for UK
  158. How can I change bias 6H30pi tube
  159. DHT heater voltage
  160. Ok SY...You Win
  161. Input level required- PP KT88
  162. SE 6C33C-B ; preview of a new Baby
  163. 2A3 grid DC voltage
  164. Dyna ST70 experience bypassing input tubes
  165. [Theory] Amplifier efficiency
  166. Pentode Cascode CCS
  167. Noval Relay
  168. Where to buy 6A5G ?
  169. AC or grounded DC for heater?
  170. EM84 based VUmeter "lines" don't go to zero
  171. 'scoping tube amps
  172. Preferred operating points of small signal triodes
  173. Is the Nuvistor Better Than The 12B4 For A Line Stage
  174. audio research schematics
  175. Looking to put the entire (last edition) RCA and Sylvania books online
  176. 5693 as a phono preamp?
  177. Audible Illusions Dual Mono Preamplifier
  178. should the filaments be already hot before the B+ is applied or
  179. One Electron vs. Transcendar
  180. &quot;Y&quot; caps? current bleed?
  181. I made a 200W tube amp!
  182. Power amp kit for a complete newbie
  183. Confused, datasheet of 417A/5842
  184. Audio Amp Project
  185. Tube tester settings?
  186. Neutrik XLR for Umbilical
  187. Primary Impedance
  188. Need help for HV section Design
  189. power amp kit recommendations
  190. 6N6P vs 5687
  191. Triode spice models for Circuit maker
  192. My ARC D70 get trouble
  193. when using PSUD2, do you...
  194. Depression... and a plea for help!!!
  195. Weston 981 Type 3 schematic and parts list needed
  196. 3W 6C33B-C SE OTL schematics ready
  197. Batory tubes, anyone familiar with these?
  198. Musical Pre-amp topology needed. Interstages please apply!
  199. Tube power Amp matching with SAE Mark M pre amp and AR18 speaker or MS 25i
  200. PowerDrive Circuit for 805 (+ve grid bias)
  201. Alternate spice models
  202. Is this heater supply OK?
  203. Basic RC Value Question
  204. Hookup powersubwoofer to a tube receiver.
  205. Transformer question RE; connections on phono stage
  206. Rectifier Tubes Data - Quick Sheet
  207. Now This is A Tube Guitar Amp!!
  208. Which cabling to use?
  209. Need 396A/6N3P/2C51/407A spice model
  210. Antek Toroidal Power Transformers
  211. HT stands for???
  212. Is it possible to hook up 6c33 plate in parallel
  213. Help eliminating hum
  214. Tube LTP CCS?
  215. Trancsendar Transformers
  216. Hafler/Keroes 6L6 UL
  217. hum
  218. Leads for ISCO PS?
  219. Negative Feedback Bogen CHB100
  220. TubeCad's Hybrid amp question
  221. Cathode bias resistor value for 6SN7?
  222. El84 2-Channel Mono Blocks
  223. Tube Design Books
  224. Interesting Williamson article..
  225. Locating Preamp Output Transformers
  226. Plate characteristics
  227. How do you finance A Great DIY Audio Amp?
  228. 808 Se
  229. Parafeed doubt
  230. A little research: old tube amps from the past
  231. RCA Victor stereo cabinet amp-newb question
  232. Transformer temperature?
  233. switch in SPICE
  234. Using a standard pentode-tetrode as output "space-charge tube" any ideas-experiences?
  235. Tube testers which is the best?
  236. finished !!!
  237. Transformer Leg Connection Question
  238. simple ccs under 5-10mA ?
  239. Curcio Sarah Phono stage: opinions?
  240. suggest a KT88 SE to build
  241. Transformer potting material??
  242. Jan E Veiset Mini EL84 pp
  243. Some questions on non common things
  244. basic question on plate curves
  245. Euro barrier strip palace
  246. ARC D90 needs new electrolytics
  247. 5763 Triode Strapped
  248. Recommend me some transformers for a PP EL84
  249. grid LED bias?
  250. Help on tube socket

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