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  1. looking for pp amp schematic without nfb
  2. Pseudo dual mono PS?
  3. WE404A drive 6L6 solution
  4. Looking for info on loudness control
  5. Tubes and minority carriers
  6. suggestions for 3 projects please
  7. DIY tube preamp kit
  8. M6 lamination: what is it?
  9. why is it that most tube projects uses copper sheetmetal?
  10. Sources in the Philippines / Manila
  11. Tube noise - Help
  12. Strange reverb circuit
  13. Tiny tube amp
  14. DC heating directly heated output valves
  15. Alps 250k in a Pas-3 Question
  16. 1st cap heats up...
  17. RCA VR Tube engineering data
  18. dropping heater voltage
  19. Please Help with Sound Valves M40 Monoblock Bias Adjustment Procedure!!!
  20. Old Sony SE OPT's /w 600r tap... cathode feedback maybe?
  21. Which is the poor man 45 tube?
  22. Audio Note Low Gain Quest Power Amplifier
  23. Quad II: Which resistors?
  24. Designing a preamp with two tubes
  25. ARC Classic 30 problem
  26. Why does the 6AS7 have such high Miller capacitance ?
  27. Driving an unusal Z=1k5-2k input spring reverb w/o tranny
  28. serching 5A6 beam power pentode data/curves/schematics for AF practice amp
  29. HPHV regulator measurement
  30. DHT Topology Comparison Question
  31. Secondary Tap of Power Transformer?
  32. Soft-clipping Circuit/tubecad
  33. lack of bass in a 6h30 design
  34. Difference between two novals
  35. C3g
  36. All Tube Stereo power amplifier
  37. what gas VR tube?
  38. KT88 schematic
  39. Help me understand the topologies here...
  40. Finished my Amp, Need to build a PS
  41. Push-Pull driver stage?
  42. Floating the heaters
  43. Replacing Power Transformer
  44. When car audio & tubes collide...
  45. 6N6P and 6SN7 Operating point suggestions
  46. NOS pF capacitors voltage rating?
  47. Tubes in Vietnam
  48. Passive pre order?
  49. layout help
  50. junkbox amp help
  51. required specs of an input step up transformer, into a 45, to allow it drive an 845
  52. 6as7 SRPP output stage
  53. Bias range and selenium rectifier
  54. OTL's and aircraft transformers
  55. PSE EL34 - valve rectification question
  56. A 2a3 Amplifier
  57. James Transformer BS
  58. Plate Voltage on 12ax7a
  59. Parallel Triodes and Load Lines
  60. Steve Bench OTL
  61. High power P-P EL34/6550/KT88 amp suggestions
  62. Stepped attenuators - break before make?
  63. audionote 144 OPT comment pls...
  64. KT88 and Hammond Transformer Schematics
  65. How do I know that my measured AC voltage is precise?
  66. 6C33B-C push pull with output transformer
  67. EL84 grid voltage?
  68. seperate power supply?
  69. Mysterious tektronix power supply
  70. tube amp subwoofer hum problem
  71. How to test transformer's current rating?
  72. Death/Black Metal sound on Crate 6212
  73. 4654/4699 pentodes
  74. Output tubes on a Marshall JCM900
  75. vacuum tube logic gate
  76. Screen current
  77. Any tube-sleuths out there know who made these Daystrom tubes?
  78. With this meter reading, enough to know Fuse is the culprit?
  79. need comments on amp design
  80. KEF/Celestion speakers for tube use...
  81. Another cheap fix - MOT as plate choke.
  82. XAM Mark II B
  83. How to test voltages on secondaries?
  84. Audio innovation L1 valve replacement
  85. Is this in-rush current?
  86. TETRODE amplifiers
  87. Audio Shop Eifl Corporation
  88. 6sn7 Buffer
  89. Marantz 8b operating voltages
  90. amplifier with 813 valves
  91. Changing plate resistor in live circuitry.
  92. 2xEL34 vs. 4xEL84 vs. 2x6L6 vs. 4x6V6
  93. KT88 drivers
  94. Simple Hybrid SE EL84 UL amp.. comments please.
  95. max input impedance for // el84's and other ?
  96. Please Help.. PCL81
  97. Some troubles with PSUD. A little help please !
  98. Why D getters?
  99. Help me information of the tubes?
  100. Questions about this line stage
  101. 5Z4P rectifier tube question
  102. Need help from Aikido builder
  103. Aikesi賍机el34尋找國外代理,可以送一台!!
  104. Direct heating triodes are really better?
  105. Audio Reality is back, in digital format
  106. Stoetkit 25W integrated amp
  107. Switchable stages with Tubelab抯 hybrid MOSFET/ 845 SE amp?
  108. Tube Pre Amplifier for SEWA 7 Watt ClassA MOSFET
  109. Michaelson Audio Odysseus Problem.
  110. ASC metal can polypro caps: ground the metal can to AC ground?
  111. anyone living in australia (hopefully adelaide) willing to lend their puncher/bit?
  112. ReinoutdV
  113. Priboj amp schematic
  114. EL84 in ultra-linear mode
  115. internal shielding
  116. RIAA: what does it stand for?
  117. Socket Mounting Rings
  118. heathkit sa2 - new question
  119. RCA R35, 39 & 57 Terminal Usage...
  120. 45 into an 845 parafeed circuit
  121. Tubes power supply 220 t0 300V ?
  122. ripple values in B+ supply
  123. Capacitors and tubes for AA5?
  124. Dynaco PAS Rebuild
  125. Audio Research SP9 Circuit Diagram HELP!
  126. ARC reference II schematic
  127. 71a Line Stage and Miller Capacitance
  128. Low plate voltage pentode (<40v) for diff pair?
  129. loadlines for newbie.
  130. Measuring approx RMS power O/P
  131. Hybrid Aikido-ish gain stage
  132. Loftin-White coupling Questions
  133. 807 screen regulation
  134. What kills an opt tranny?
  135. EAR529 schematic diagram
  136. World Designs KEL84 Valve Amplifier
  137. what 300B design would you recommend but...
  138. Replacement conductance meter for Hickok 533A
  139. My RIAA Phono Stage Project
  140. A2 Questions
  141. World Audio Design
  142. Seek for your comments/advice to newbie on Tube world
  143. CCSed LTP validity?
  144. Suitability of transmitter tubes for musical amplifiers
  145. Anyone using an 813 in pentode?
  146. Electrolytic in the feedback loop
  147. El34 PP Vs. El34 PSE
  148. RIAA Phono Amp Design
  149. Matching resistors to 1% or Better
  150. Wirewound cathode resistor
  151. Tube Hybrid Amp.
  152. Nasty ground loop
  153. ECC88 Class B
  154. Cree diodes
  155. Old Tube Amp Servicer In Nj???
  156. Vg-k max
  157. Anyone used PT15 / VT104 ?
  158. rebuild a Musical Fidelity X-10D ??
  159. Transformer Building
  160. Identifying weird signal transformer
  161. 100watt mono blocks
  162. Resistor combination calculator - RESCALC
  163. Aikido choice of valves (or tubes, if you will)
  164. Pin 9 on 6n6P, 6H30, etc
  165. Croft Super Micro meets Acoustat TNT200
  166. tube mic preamp kit??
  167. The SACD Meets Tubes
  168. Useful Abbreviations
  169. cap value for 6X4 rectifier?
  170. One B+ for the both driver and output tube if they are identical?
  171. Fisher 500B Schematic Question
  172. SE Output Transfromers Question
  173. Amplifier Project
  174. Grid Stopper for parallel sides of dual triode
  175. centre tap or floating heaters?
  176. Converting 6.3V to 6.3VCT Quick questions
  177. Russian Nuvistors...Anyone tried them?
  178. 一台300bc胆机,大家给点意见,谢谢
  179. Australian Amp Manufacturers
  180. Old radio quick question re PS
  181. Kt90 Pse
  182. Velleman K4040 is Always Blowing Output Tubes
  183. looking for transformer with the following specs?
  184. 5686 amplifier schematic
  185. Heaters for cathodes with a large swing
  186. 6DJ8 as phase splitter.
  187. New driver for SE 2A3
  188. I磛e made a Mu stage with 6888 and 6C45...
  189. Quick urgent Help plz !
  190. Cheap SET Kit for UK
  191. How can I change bias 6H30pi tube
  192. DHT heater voltage
  193. Ok SY...You Win
  194. Input level required- PP KT88
  195. SE 6C33C-B ; preview of a new Baby
  196. 2A3 grid DC voltage
  197. Dyna ST70 experience bypassing input tubes
  198. [Theory] Amplifier efficiency
  199. Pentode Cascode CCS
  200. Noval Relay
  201. Where to buy 6A5G ?
  202. AC or grounded DC for heater?
  203. EM84 based VUmeter "lines" don't go to zero
  204. 'scoping tube amps
  205. Preferred operating points of small signal triodes
  206. Is the Nuvistor Better Than The 12B4 For A Line Stage
  207. audio research schematics
  208. Looking to put the entire (last edition) RCA and Sylvania books online
  209. 5693 as a phono preamp?
  210. Audible Illusions Dual Mono Preamplifier
  211. should the filaments be already hot before the B+ is applied or
  212. One Electron vs. Transcendar
  213. &quot;Y&quot; caps? current bleed?
  214. I made a 200W tube amp!
  215. Power amp kit for a complete newbie
  216. Confused, datasheet of 417A/5842
  217. Audio Amp Project
  218. Tube tester settings?
  219. Neutrik XLR for Umbilical
  220. Primary Impedance
  221. Need help for HV section Design
  222. power amp kit recommendations
  223. 6N6P vs 5687
  224. Triode spice models for Circuit maker
  225. My ARC D70 get trouble
  226. when using PSUD2, do you...
  227. Depression... and a plea for help!!!
  228. Weston 981 Type 3 schematic and parts list needed
  229. 3W 6C33B-C SE OTL schematics ready
  230. Batory tubes, anyone familiar with these?
  231. Musical Pre-amp topology needed. Interstages please apply!
  232. Tube power Amp matching with SAE Mark M pre amp and AR18 speaker or MS 25i
  233. PowerDrive Circuit for 805 (+ve grid bias)
  234. Alternate spice models
  235. Is this heater supply OK?
  236. Basic RC Value Question
  237. Hookup powersubwoofer to a tube receiver.
  238. Transformer question RE; connections on phono stage
  239. Rectifier Tubes Data - Quick Sheet
  240. Now This is A Tube Guitar Amp!!
  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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