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  1. ppp el84 fixed bias schematics
  2. Tube buffered NIGC trafo thoughs?
  3. driver stage
  4. PS cap placement/type
  5. Vintage OPT
  6. simple, single-ended project
  7. 6sn7 - 6bx7 - sv811-3 amp
  8. I look for a correct driver stage
  9. PCB tubes amp?
  10. XLR to 1/4" TRS?
  11. Umbilical Connector Suggestions
  12. Good Inexpensive Starter Amp Kit
  13. tube rectified preamp schematic
  14. oxygen free interconnects
  15. how to calculate feedback resistor
  16. Topaz Isolation Tranny
  17. 4E27A monster se amp??
  18. 6V6 Parafeed?
  19. Old Tranny Potting Material
  20. Brimar ECC81
  21. PCB mounting B7G sockets
  22. Directly heated cathodes, but why?
  23. SET kit for newbie
  24. High Power 805 Triode based amplifier
  25. DigitalSignalProcessing -> future?
  26. 5v Damper Diode?
  27. Tubes in Class D amplifiers
  28. Universal power supply UIP-1 from former USSR schematics
  29. First project for Proac loudspeakers
  30. transformers
  31. cathode battery bias questions
  32. tube amp project
  33. AN DacKit 1.2 Upgrade Ideas
  34. What are the requirements for driving a 300B?
  35. 900v. 100ma. Power supply for 813 tube amplifier
  36. Chassis Internal Height / Pot Clearance
  37. Bogen help
  38. 211 VT-4C Good Simple SE Schematic
  39. mosfet in regulated PS.
  40. Hammond Transformer in Toronto
  41. 6n30pi plate resistance ?
  42. balanced input stage
  43. A better triode strap?
  44. Chinese new 845
  45. what tube manufacture of 6550??
  46. Low frequency noise in a 12B4 preamp
  47. Difference between CK6528 and 6528A ?
  48. 6L6 help needed
  49. Hawksford style error correcting output
  50. SE UL OT - primary wired in reverse
  51. tube bias pot question
  52. Transformer supplier in Australia
  53. Newb here
  54. Anyone familiar with James output transformers?
  55. What Limits Freqency response in a simple tube amp like the zen?
  56. Grid driven (ETM) KT88 SE amp design - final works on paper
  57. Sansui 1000 outputs?
  58. The overlooked is often cheaper
  59. Tube amp design characteristics?
  60. ecc40 or 76 as driver for 2A3
  61. toroids on top of each other ?
  62. Out Of Order
  63. Pinging JAX (Sweden)
  64. Common Cathode 6922 output impedance?
  65. Blue Velvet Preamp
  66. Has anyone got any plans for a car amp?
  67. Tube Radio Kit
  68. New Tube Porn!!
  69. Need someone to host my "TUBE PORN" images.
  70. Trying to understand preamp schematic...
  71. 6C33C schematic
  72. We have liftoff!!!! Houston, all systems are go!
  73. Dynaco ST70
  74. Is Tesla still going?
  75. yet another 12b4a
  76. Tubes load resistance and output trans impedance
  77. Antique schematic help please.
  78. 12b4a wiring question
  79. $1 AMP find
  80. Heater winding load question.
  81. Direct Coupling Modulated Bias (SET)
  82. Amp with 6c33
  83. Ideas for amp rebuild...
  84. simple tube amp
  85. What's the ideal tube amplifier for me for max. $660 , maybe a kit ?
  86. CCS design help!!
  87. Proposed Transfomer/Valve Layout
  88. My darling is giving me hell!
  89. EL84 or 6v6 or something else?
  90. Borbely hybrid phono
  91. SS power supply question
  92. RCA Tube Radio...circa 1930-40
  93. New project on 807
  94. SE design using 10k OPTs
  95. Biasing a cathode follower?
  96. Lower Distortion Alternatives to 12AT7 & 12AU7 ?
  97. Information needed
  98. Hybrid
  99. found two boxes of GE 6CL6 tubes
  100. Please help me compare 2 cattle of fish...
  101. Vacuum Tube Valley 6SN7 preamp
  102. SET Power Supply Regulation
  103. TubeCAD
  104. 60 Hz noise in modified Audible Illusions M2B
  105. Anodized Aluminum and Glue/Epoxy
  106. shared parts between channels
  107. May I use 5K transformer for Dynaco III amp?
  108. First amp build questions
  109. Help needed changing from srpp5814a to srpp12bh7a
  110. ok, i'll try and make it simple.
  111. Sure, copy an amp. . . It'd work but I'm looking for something different.
  112. Half a bee Philosophically. . . Er sorry Its actually about ECC83 amps
  113. Bogan schematic for HO 50 power Amp
  114. Can VT-185 be applied in audio circuit?
  115. Best PP transformer for 2A3 amp?
  116. help in finding tubetester meter value
  117. B+ Voltage
  118. CCS Conceptual Qs, Using Gary Pimm CCS as Example
  119. Is there a no/gain preamplifier schematic using high-distortion EC90?
  120. Klystron??
  121. single ended 2a3 project
  122. Visit Shuguang tube factory(many pics)
  123. AKAI M8 Tube R-R input problem
  124. How do Sovtek 6L6WGCs stand up?
  125. Hammond SE Transformer question
  126. Tube Safety
  127. old console
  128. AB1 or 2?
  129. help with restoring amp
  130. Tube preamplifier with PCC88
  131. Tube amplifier 300b proyect
  132. linestage needed
  133. 5687 Tube - best choice
  134. Fisher 500c - Trouble shooting tuner section
  135. Morgan Jones book to swap
  136. gu-48 PP
  137. Taylor 45b Gm Problem
  138. 5687, ECC99, 7119, or E182CC??
  139. Bell Sound Systems Old Gem
  140. Mu-follower current capability?
  141. Filaments voltage question
  142. Is it Good to regulate supplies?
  143. Damper Diodes
  144. Fisher X-100 transformers
  145. Some questions about C4S CCS adjustment.
  146. Lowther LL18S stereo power amplifier - circuit diagram?
  147. Problem with mouting choke underneath chassis?
  148. How accurate is RMAA distortion measurement?
  149. 801
  150. CROFT Eminent Audio
  151. Any good flea-watt SET designs?
  152. PTP wiring
  153. switching regulators
  154. Push Pull Power supply. to Tube or not to?
  155. Kepco 615B Bench Supply pix
  156. Standart gains and voltage levels for standart audio eq
  157. How do I measure OPT impedance?
  158. Using TFA 204 transformers for SE EL84?
  159. Help on 311-CH triode tube
  160. Shots of my GG pre amp!!
  161. 6C45Pi Microphone Preamp
  162. cf topology lessons... pls help
  163. Father's Cousin Louis's vintage 1920+ collection pictures!
  164. Tube Newbie needs help
  165. Need help
  166. Zytron Tubes
  167. Hapi2 Preamp
  168. Svetlana Cryo Tubes For Wave 8's
  169. Audio Note Preamp Circuit a good guess...
  170. Which one is the better design?
  171. Lab Power Supply for Glass Audio
  172. A joke?
  173. Need Advice on new Amp
  174. Using the 7591 or 7868
  175. Schematic of Audio Research VT 100
  176. Hermetically sealed Oil Filled resistors!
  177. Pre Amp schematic Audio Note M1
  178. opt impedance
  179. Schematic for Bogen DB130 ?
  180. SRPP Help Needed
  181. Schematic for Bogen DB130 ?
  182. Hot tube
  183. 6L6 Design Phase
  184. High Power Single Ended Amplifier Club
  185. Suggestions please..
  186. These are the best looking tube amps I have ever seen
  187. Sylvania News
  188. Will this work? "Mixed" 300B PPP IT
  189. Whats a Good 6L6 circuit?
  190. Circlotron amps
  191. Mods on leak stereo 20
  192. When do the tubes have a fever?
  193. psu problem
  194. earthing
  195. 6V6 SET amp with 6SN7 driver
  196. 6n1p pre with active load
  197. buy tubes in the EU
  198. Neutral AC wave on O'scope
  199. Running power to tubes so as not to effect the audio signal
  200. el34 se schematic opinion
  201. EF86
  202. A Rimbaldi amp?
  203. SE or PP?
  204. PP 807's
  205. CCS loading first stage of DC coupled driver
  206. Search for a pre (RIAA+LINE+TUNER)with 12au7-12ax7.
  207. Film cap's
  208. Goertz: amp killer? or where to fix my Audio Research VSi55?
  209. help finding a good amp project?
  210. Yet another valve pre, comments?!
  211. Source for round and/or square transformer covers ??
  212. Some questions!
  213. filament source connection to DHT
  214. Use tubes for 2000V. power supply,
  215. mu / srpp / or CF?
  216. dB into voltage gain????
  217. Building a Tube Mic Pre
  218. Negative Voltage using tube rectifier?
  219. Reichert info
  220. really basic question
  221. Has anybody built 6BG6 or similar OTL amp?
  222. Old OP Transformer
  223. Need Advice, 820vct tranny?
  224. 811a Tube Cap Size
  225. need help with (now) not-working amp
  226. How about this 12au7 pre?
  227. SV811-3 SE : Lots of questions...
  228. Criticise please!
  229. 6n3p = ECC85 ???
  230. Any website reference for diy Audio Research REFERENCE amp and Manley Studio amp
  231. grid bias
  232. 12AT7 poweramp specs?
  233. valve pre amp
  234. what is the simplest possible triode amp?
  235. poweramp topology
  236. limits in transient time
  237. OPT Design
  238. Would this work
  239. manley pre schematic
  240. Heathkit FM3A
  241. Aleph-type CCS as plate load?
  242. Talbot Wright's Williamson mod (Heathkit W3-AM)
  243. Conrad-Johnson PV6 Preamp
  244. MC275 OPT manual rewinding
  245. Newbie asking help
  246. converting EF86 to take 12AX7
  247. 5814/12AU7 Preamp?
  248. Grounded Grid pre amp-- help please
  249. Tube output indicator - EM84 or 6AF6G
  250. suggest circuit with gain of 60

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