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  1. Vintage OPT
  2. simple, single-ended project
  3. 6sn7 - 6bx7 - sv811-3 amp
  4. I look for a correct driver stage
  5. PCB tubes amp?
  6. XLR to 1/4" TRS?
  7. Umbilical Connector Suggestions
  8. Good Inexpensive Starter Amp Kit
  9. tube rectified preamp schematic
  10. oxygen free interconnects
  11. how to calculate feedback resistor
  12. Topaz Isolation Tranny
  13. 4E27A monster se amp??
  14. 6V6 Parafeed?
  15. Old Tranny Potting Material
  16. Brimar ECC81
  17. PCB mounting B7G sockets
  18. Directly heated cathodes, but why?
  19. SET kit for newbie
  20. High Power 805 Triode based amplifier
  21. DigitalSignalProcessing -> future?
  22. 5v Damper Diode?
  23. Tubes in Class D amplifiers
  24. Universal power supply UIP-1 from former USSR schematics
  25. First project for Proac loudspeakers
  26. transformers
  27. cathode battery bias questions
  28. tube amp project
  29. AN DacKit 1.2 Upgrade Ideas
  30. What are the requirements for driving a 300B?
  31. 900v. 100ma. Power supply for 813 tube amplifier
  32. Chassis Internal Height / Pot Clearance
  33. Bogen help
  34. Tube tester questions
  35. 211 VT-4C Good Simple SE Schematic
  36. mosfet in regulated PS.
  37. Hammond Transformer in Toronto
  38. 6n30pi plate resistance ?
  39. balanced input stage
  40. A better triode strap?
  41. Chinese new 845
  42. what tube manufacture of 6550??
  43. Low frequency noise in a 12B4 preamp
  44. Difference between CK6528 and 6528A ?
  45. 6L6 help needed
  46. Hawksford style error correcting output
  47. SE UL OT - primary wired in reverse
  48. tube bias pot question
  49. Transformer supplier in Australia
  50. Newb here
  51. Anyone familiar with James output transformers?
  52. What Limits Freqency response in a simple tube amp like the zen?
  53. Grid driven (ETM) KT88 SE amp design - final works on paper
  54. Sansui 1000 outputs?
  55. The overlooked is often cheaper
  56. Tube amp design characteristics?
  57. ecc40 or 76 as driver for 2A3
  58. toroids on top of each other ?
  59. Out Of Order
  60. Pinging JAX (Sweden)
  61. Common Cathode 6922 output impedance?
  62. Blue Velvet Preamp
  63. Has anyone got any plans for a car amp?
  64. Tube Radio Kit
  65. New Tube Porn!!
  66. Need someone to host my "TUBE PORN" images.
  67. Trying to understand preamp schematic...
  68. 6C33C schematic
  69. We have liftoff!!!! Houston, all systems are go!
  70. Dynaco ST70
  71. Is Tesla still going?
  72. yet another 12b4a
  73. Tubes load resistance and output trans impedance
  74. Antique schematic help please.
  75. 12b4a wiring question
  76. $1 AMP find
  77. Heater winding load question.
  78. Direct Coupling Modulated Bias (SET)
  79. Amp with 6c33
  80. Ideas for amp rebuild...
  81. simple tube amp
  82. What's the ideal tube amplifier for me for max. $660 , maybe a kit ?
  83. CCS design help!!
  84. Proposed Transfomer/Valve Layout
  85. My darling is giving me hell!
  86. EL84 or 6v6 or something else?
  87. Borbely hybrid phono
  88. SS power supply question
  89. RCA Tube Radio...circa 1930-40
  90. New project on 807
  91. SE design using 10k OPTs
  92. Biasing a cathode follower?
  93. Lower Distortion Alternatives to 12AT7 & 12AU7 ?
  94. Information needed
  95. Hybrid
  96. found two boxes of GE 6CL6 tubes
  97. Please help me compare 2 cattle of fish...
  98. Vacuum Tube Valley 6SN7 preamp
  99. SET Power Supply Regulation
  100. TubeCAD
  101. 60 Hz noise in modified Audible Illusions M2B
  102. Anodized Aluminum and Glue/Epoxy
  103. shared parts between channels
  104. May I use 5K transformer for Dynaco III amp?
  105. First amp build questions
  106. Help needed changing from srpp5814a to srpp12bh7a
  107. ok, i'll try and make it simple.
  108. Sure, copy an amp. . . It'd work but I'm looking for something different.
  109. Half a bee Philosophically. . . Er sorry Its actually about ECC83 amps
  110. Bogan schematic for HO 50 power Amp
  111. Can VT-185 be applied in audio circuit?
  112. Best PP transformer for 2A3 amp?
  113. help in finding tubetester meter value
  114. B+ Voltage
  115. CCS Conceptual Qs, Using Gary Pimm CCS as Example
  116. Is there a no/gain preamplifier schematic using high-distortion EC90?
  117. Klystron??
  118. single ended 2a3 project
  119. Visit Shuguang tube factory(many pics)
  120. AKAI M8 Tube R-R input problem
  121. How do Sovtek 6L6WGCs stand up?
  122. Hammond SE Transformer question
  123. Tube Safety
  124. old console
  125. AB1 or 2?
  126. help with restoring amp
  127. Tube preamplifier with PCC88
  128. Tube amplifier 300b proyect
  129. linestage needed
  130. 5687 Tube - best choice
  131. Fisher 500c - Trouble shooting tuner section
  132. Morgan Jones book to swap
  133. gu-48 PP
  134. Taylor 45b Gm Problem
  135. 5687, ECC99, 7119, or E182CC??
  136. Bell Sound Systems Old Gem
  137. Mu-follower current capability?
  138. Filaments voltage question
  139. Is it Good to regulate supplies?
  140. Damper Diodes
  141. Fisher X-100 transformers
  142. Some questions about C4S CCS adjustment.
  143. Lowther LL18S stereo power amplifier - circuit diagram?
  144. Problem with mouting choke underneath chassis?
  145. How accurate is RMAA distortion measurement?
  146. 801
  147. CROFT Eminent Audio
  148. Any good flea-watt SET designs?
  149. PTP wiring
  150. switching regulators
  151. Push Pull Power supply. to Tube or not to?
  152. Kepco 615B Bench Supply pix
  153. Standart gains and voltage levels for standart audio eq
  154. How do I measure OPT impedance?
  155. Using TFA 204 transformers for SE EL84?
  156. Help on 311-CH triode tube
  157. Shots of my GG pre amp!!
  158. 6C45Pi Microphone Preamp
  159. cf topology lessons... pls help
  160. Father's Cousin Louis's vintage 1920+ collection pictures!
  161. Tube Newbie needs help
  162. Need help
  163. Zytron Tubes
  164. Hapi2 Preamp
  165. Svetlana Cryo Tubes For Wave 8's
  166. Audio Note Preamp Circuit a good guess...
  167. Which one is the better design?
  168. Lab Power Supply for Glass Audio
  169. A joke?
  170. Need Advice on new Amp
  171. Using the 7591 or 7868
  172. Schematic of Audio Research VT 100
  173. Hermetically sealed Oil Filled resistors!
  174. Pre Amp schematic Audio Note M1
  175. opt impedance
  176. Schematic for Bogen DB130 ?
  177. SRPP Help Needed
  178. Schematic for Bogen DB130 ?
  179. Hot tube
  180. 6L6 Design Phase
  181. High Power Single Ended Amplifier Club
  182. Suggestions please..
  183. These are the best looking tube amps I have ever seen
  184. Sylvania News
  185. Will this work? "Mixed" 300B PPP IT
  186. Whats a Good 6L6 circuit?
  187. Circlotron amps
  188. Mods on leak stereo 20
  189. When do the tubes have a fever?
  190. psu problem
  191. earthing
  192. 6V6 SET amp with 6SN7 driver
  193. 6n1p pre with active load
  194. buy tubes in the EU
  195. Neutral AC wave on O'scope
  196. Running power to tubes so as not to effect the audio signal
  197. el34 se schematic opinion
  198. EF86
  199. A Rimbaldi amp?
  200. SE or PP?
  201. PP 807's
  202. CCS loading first stage of DC coupled driver
  203. Search for a pre (RIAA+LINE+TUNER)with 12au7-12ax7.
  204. Film cap's
  205. Goertz: amp killer? or where to fix my Audio Research VSi55?
  206. help finding a good amp project?
  207. Yet another valve pre, comments?!
  208. Source for round and/or square transformer covers ??
  209. Some questions!
  210. filament source connection to DHT
  211. Use tubes for 2000V. power supply,
  212. mu / srpp / or CF?
  213. dB into voltage gain????
  214. Building a Tube Mic Pre
  215. Negative Voltage using tube rectifier?
  216. Reichert info
  217. really basic question
  218. Has anybody built 6BG6 or similar OTL amp?
  219. Old OP Transformer
  220. Need Advice, 820vct tranny?
  221. 811a Tube Cap Size
  222. need help with (now) not-working amp
  223. How about this 12au7 pre?
  224. SV811-3 SE : Lots of questions...
  225. Criticise please!
  226. 6n3p = ECC85 ???
  227. Any website reference for diy Audio Research REFERENCE amp and Manley Studio amp
  228. grid bias
  229. 12AT7 poweramp specs?
  230. valve pre amp
  231. what is the simplest possible triode amp?
  232. poweramp topology
  233. limits in transient time
  234. OPT Design
  235. Would this work
  236. manley pre schematic
  237. Heathkit FM3A
  238. Aleph-type CCS as plate load?
  239. Talbot Wright's Williamson mod (Heathkit W3-AM)
  240. Conrad-Johnson PV6 Preamp
  241. MC275 OPT manual rewinding
  242. Newbie asking help
  243. converting EF86 to take 12AX7
  244. B&K 650 tube tester not working, need help
  245. 5814/12AU7 Preamp?
  246. Grounded Grid pre amp-- help please
  247. Tube output indicator - EM84 or 6AF6G
  248. suggest circuit with gain of 60
  249. ready to mod the hell out of my asl wave 8's
  250. My First DIY - need big help!

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