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  1. High Power 805 Triode based amplifier
  2. DigitalSignalProcessing -> future?
  3. 5v Damper Diode?
  4. Tubes in Class D amplifiers
  5. Universal power supply UIP-1 from former USSR schematics
  6. First project for Proac loudspeakers
  7. transformers
  8. cathode battery bias questions
  9. tube amp project
  10. AN DacKit 1.2 Upgrade Ideas
  11. What are the requirements for driving a 300B?
  12. 900v. 100ma. Power supply for 813 tube amplifier
  13. Chassis Internal Height / Pot Clearance
  14. Bogen help
  15. 211 VT-4C Good Simple SE Schematic
  16. mosfet in regulated PS.
  17. Hammond Transformer in Toronto
  18. 6n30pi plate resistance ?
  19. balanced input stage
  20. A better triode strap?
  21. Chinese new 845
  22. what tube manufacture of 6550??
  23. Low frequency noise in a 12B4 preamp
  24. Difference between CK6528 and 6528A ?
  25. 6L6 help needed
  26. Hawksford style error correcting output
  27. SE UL OT - primary wired in reverse
  28. tube bias pot question
  29. Transformer supplier in Australia
  30. Newb here
  31. Anyone familiar with James output transformers?
  32. What Limits Freqency response in a simple tube amp like the zen?
  33. Grid driven (ETM) KT88 SE amp design - final works on paper
  34. Sansui 1000 outputs?
  35. The overlooked is often cheaper
  36. Tube amp design characteristics?
  37. ecc40 or 76 as driver for 2A3
  38. toroids on top of each other ?
  39. Out Of Order
  40. Pinging JAX (Sweden)
  41. Common Cathode 6922 output impedance?
  42. Blue Velvet Preamp
  43. Has anyone got any plans for a car amp?
  44. Tube Radio Kit
  45. New Tube Porn!!
  46. Need someone to host my "TUBE PORN" images.
  47. Trying to understand preamp schematic...
  48. 6C33C schematic
  49. We have liftoff!!!! Houston, all systems are go!
  50. Dynaco ST70
  51. Is Tesla still going?
  52. yet another 12b4a
  53. Tubes load resistance and output trans impedance
  54. Antique schematic help please.
  55. 12b4a wiring question
  56. $1 AMP find
  57. Heater winding load question.
  58. Direct Coupling Modulated Bias (SET)
  59. Amp with 6c33
  60. Ideas for amp rebuild...
  61. simple tube amp
  62. What's the ideal tube amplifier for me for max. $660 , maybe a kit ?
  63. CCS design help!!
  64. Proposed Transfomer/Valve Layout
  65. My darling is giving me hell!
  66. EL84 or 6v6 or something else?
  67. Borbely hybrid phono
  68. SS power supply question
  69. RCA Tube Radio...circa 1930-40
  70. New project on 807
  71. SE design using 10k OPTs
  72. Biasing a cathode follower?
  73. Lower Distortion Alternatives to 12AT7 & 12AU7 ?
  74. Information needed
  75. Hybrid
  76. found two boxes of GE 6CL6 tubes
  77. Please help me compare 2 cattle of fish...
  78. Vacuum Tube Valley 6SN7 preamp
  79. SET Power Supply Regulation
  80. TubeCAD
  81. 60 Hz noise in modified Audible Illusions M2B
  82. Anodized Aluminum and Glue/Epoxy
  83. shared parts between channels
  84. May I use 5K transformer for Dynaco III amp?
  85. First amp build questions
  86. Help needed changing from srpp5814a to srpp12bh7a
  87. ok, i'll try and make it simple.
  88. Sure, copy an amp. . . It'd work but I'm looking for something different.
  89. Half a bee Philosophically. . . Er sorry Its actually about ECC83 amps
  90. Bogan schematic for HO 50 power Amp
  91. Can VT-185 be applied in audio circuit?
  92. Best PP transformer for 2A3 amp?
  93. help in finding tubetester meter value
  94. B+ Voltage
  95. CCS Conceptual Qs, Using Gary Pimm CCS as Example
  96. Is there a no/gain preamplifier schematic using high-distortion EC90?
  97. Klystron??
  98. single ended 2a3 project
  99. Visit Shuguang tube factory(many pics)
  100. AKAI M8 Tube R-R input problem
  101. How do Sovtek 6L6WGCs stand up?
  102. Hammond SE Transformer question
  103. Tube Safety
  104. old console
  105. AB1 or 2?
  106. help with restoring amp
  107. Tube preamplifier with PCC88
  108. Tube amplifier 300b proyect
  109. linestage needed
  110. 5687 Tube - best choice
  111. Fisher 500c - Trouble shooting tuner section
  112. Morgan Jones book to swap
  113. gu-48 PP
  114. Taylor 45b Gm Problem
  115. 5687, ECC99, 7119, or E182CC??
  116. Bell Sound Systems Old Gem
  117. Mu-follower current capability?
  118. Filaments voltage question
  119. Is it Good to regulate supplies?
  120. Damper Diodes
  121. Fisher X-100 transformers
  122. Some questions about C4S CCS adjustment.
  123. Lowther LL18S stereo power amplifier - circuit diagram?
  124. Problem with mouting choke underneath chassis?
  125. How accurate is RMAA distortion measurement?
  126. 801
  127. CROFT Eminent Audio
  128. Any good flea-watt SET designs?
  129. PTP wiring
  130. switching regulators
  131. Push Pull Power supply. to Tube or not to?
  132. Kepco 615B Bench Supply pix
  133. Standart gains and voltage levels for standart audio eq
  134. How do I measure OPT impedance?
  135. Using TFA 204 transformers for SE EL84?
  136. Help on 311-CH triode tube
  137. Shots of my GG pre amp!!
  138. 6C45Pi Microphone Preamp
  139. cf topology lessons... pls help
  140. Father's Cousin Louis's vintage 1920+ collection pictures!
  141. Tube Newbie needs help
  142. Need help
  143. Zytron Tubes
  144. Hapi2 Preamp
  145. Svetlana Cryo Tubes For Wave 8's
  146. Audio Note Preamp Circuit a good guess...
  147. Which one is the better design?
  148. Lab Power Supply for Glass Audio
  149. A joke?
  150. Need Advice on new Amp
  151. Using the 7591 or 7868
  152. Schematic of Audio Research VT 100
  153. Hermetically sealed Oil Filled resistors!
  154. Pre Amp schematic Audio Note M1
  155. opt impedance
  156. Schematic for Bogen DB130 ?
  157. SRPP Help Needed
  158. Schematic for Bogen DB130 ?
  159. Hot tube
  160. 6L6 Design Phase
  161. High Power Single Ended Amplifier Club
  162. Suggestions please..
  163. These are the best looking tube amps I have ever seen
  164. Sylvania News
  165. Will this work? "Mixed" 300B PPP IT
  166. Whats a Good 6L6 circuit?
  167. Circlotron amps
  168. Mods on leak stereo 20
  169. When do the tubes have a fever?
  170. psu problem
  171. earthing
  172. 6V6 SET amp with 6SN7 driver
  173. 6n1p pre with active load
  174. buy tubes in the EU
  175. Neutral AC wave on O'scope
  176. Running power to tubes so as not to effect the audio signal
  177. el34 se schematic opinion
  178. EF86
  179. A Rimbaldi amp?
  180. SE or PP?
  181. PP 807's
  182. CCS loading first stage of DC coupled driver
  183. Search for a pre (RIAA+LINE+TUNER)with 12au7-12ax7.
  184. Film cap's
  185. Goertz: amp killer? or where to fix my Audio Research VSi55?
  186. help finding a good amp project?
  187. Yet another valve pre, comments?!
  188. Source for round and/or square transformer covers ??
  189. Some questions!
  190. filament source connection to DHT
  191. Use tubes for 2000V. power supply,
  192. mu / srpp / or CF?
  193. dB into voltage gain????
  194. Building a Tube Mic Pre
  195. Negative Voltage using tube rectifier?
  196. Reichert info
  197. really basic question
  198. Has anybody built 6BG6 or similar OTL amp?
  199. Old OP Transformer
  200. Need Advice, 820vct tranny?
  201. 811a Tube Cap Size
  202. need help with (now) not-working amp
  203. How about this 12au7 pre?
  204. SV811-3 SE : Lots of questions...
  205. Criticise please!
  206. 6n3p = ECC85 ???
  207. Any website reference for diy Audio Research REFERENCE amp and Manley Studio amp
  208. grid bias
  209. 12AT7 poweramp specs?
  210. valve pre amp
  211. what is the simplest possible triode amp?
  212. poweramp topology
  213. limits in transient time
  214. OPT Design
  215. Would this work
  216. manley pre schematic
  217. Heathkit FM3A
  218. Aleph-type CCS as plate load?
  219. Talbot Wright's Williamson mod (Heathkit W3-AM)
  220. Conrad-Johnson PV6 Preamp
  221. MC275 OPT manual rewinding
  222. Newbie asking help
  223. converting EF86 to take 12AX7
  224. 5814/12AU7 Preamp?
  225. Grounded Grid pre amp-- help please
  226. Tube output indicator - EM84 or 6AF6G
  227. suggest circuit with gain of 60
  228. ready to mod the hell out of my asl wave 8's
  229. My First DIY - need big help!
  230. rectifier tube question
  231. Newbie with Tannoy grfs, helpme to choice a good amp to them.
  232. Mullard CV 4109 tube
  233. Pre PS Improvements?
  234. 6n7gt+300b
  235. Calculating DC coupled Single Ended Valve Amplifiers - Part #1
  236. 12ax7 preamp,need help.
  237. tube datasheets and amp sch
  238. How to check output transformers ?
  239. Filament of a 6AS7G
  240. triode=>pentode
  241. noob PSUD question...
  242. Detailed and Dry.
  243. Audion sterling phono stage - a good base for future upgrades?
  244. First Try on Tube Preamp
  245. EL34 in class AB2 triode mode push-pull?
  246. Heater Voltage Range, Hi or Low
  247. Donor H/K A224 Amp
  248. market for used tubes?
  249. Voltage Doubler Problem
  250. 6922 as a CCS, a question ?

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