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  1. Common Cathode 6922 output impedance?
  2. Blue Velvet Preamp
  3. Has anyone got any plans for a car amp?
  4. Tube Radio Kit
  5. New Tube Porn!!
  6. Need someone to host my "TUBE PORN" images.
  7. Trying to understand preamp schematic...
  8. 6C33C schematic
  9. We have liftoff!!!! Houston, all systems are go!
  10. Dynaco ST70
  11. Is Tesla still going?
  12. yet another 12b4a
  13. Tubes load resistance and output trans impedance
  14. Antique schematic help please.
  15. 12b4a wiring question
  16. $1 AMP find
  17. Heater winding load question.
  18. Direct Coupling Modulated Bias (SET)
  19. Amp with 6c33
  20. Ideas for amp rebuild...
  21. simple tube amp
  22. What's the ideal tube amplifier for me for max. $660 , maybe a kit ?
  23. CCS design help!!
  24. Proposed Transfomer/Valve Layout
  25. Mic input for guitar?
  26. My darling is giving me hell!
  27. EL84 or 6v6 or something else?
  28. Borbely hybrid phono
  29. SS power supply question
  30. RCA Tube Radio...circa 1930-40
  31. New project on 807
  32. SE design using 10k OPTs
  33. Biasing a cathode follower?
  34. Lower Distortion Alternatives to 12AT7 & 12AU7 ?
  35. Oil in Paper in oil capacitor.
  36. Valves for Crackly Fender Hot Rod
  37. Information needed
  38. Hybrid
  39. heavy metal, low power guitar amp?
  40. found two boxes of GE 6CL6 tubes
  41. Please help me compare 2 cattle of fish...
  42. Vacuum Tube Valley 6SN7 preamp
  43. SET Power Supply Regulation
  44. TubeCAD
  45. 60 Hz noise in modified Audible Illusions M2B
  46. Anodized Aluminum and Glue/Epoxy
  47. shared parts between channels
  48. May I use 5K transformer for Dynaco III amp?
  49. First amp build questions
  50. Help needed changing from srpp5814a to srpp12bh7a
  51. ok, i'll try and make it simple.
  52. Sure, copy an amp. . . It'd work but I'm looking for something different.
  53. Half a bee Philosophically. . . Er sorry Its actually about ECC83 amps
  54. Bogan schematic for HO 50 power Amp
  55. Gibson GA-15RV tube amp
  56. Can VT-185 be applied in audio circuit?
  57. Best PP transformer for 2A3 amp?
  58. help in finding tubetester meter value
  59. B+ Voltage
  60. CCS Conceptual Qs, Using Gary Pimm CCS as Example
  61. Is there a no/gain preamplifier schematic using high-distortion EC90?
  62. marshall jcm hifi?
  63. Klystron??
  64. single ended 2a3 project
  65. Visit Shuguang tube factory(many pics)
  66. AKAI M8 Tube R-R input problem
  67. How do Sovtek 6L6WGCs stand up?
  68. Hammond SE Transformer question
  69. Tube Safety
  70. old console
  71. AB1 or 2?
  72. help with restoring amp
  73. Tube preamplifier with PCC88
  74. Tube amplifier 300b proyect
  75. linestage needed
  76. 5687 Tube - best choice
  77. Fisher 500c - Trouble shooting tuner section
  78. Morgan Jones book to swap
  79. gu-48 PP
  80. Taylor 45b Gm Problem
  81. 5687, ECC99, 7119, or E182CC??
  82. Bell Sound Systems Old Gem
  83. Mu-follower current capability?
  84. Bogen M330A Tube PA Amp for Guitar
  85. Filaments voltage question
  86. Is it Good to regulate supplies?
  87. Damper Diodes
  88. Fisher X-100 transformers
  89. Some questions about C4S CCS adjustment.
  90. Lowther LL18S stereo power amplifier - circuit diagram?
  91. Problem with mouting choke underneath chassis?
  92. How accurate is RMAA distortion measurement?
  93. 801
  94. CROFT Eminent Audio
  95. Any good flea-watt SET designs?
  96. PTP wiring
  97. switching regulators
  98. Push Pull Power supply. to Tube or not to?
  99. Kepco 615B Bench Supply pix
  100. Standart gains and voltage levels for standart audio eq
  101. How do I measure OPT impedance?
  102. Using TFA 204 transformers for SE EL84?
  103. Help on 311-CH triode tube
  104. Shots of my GG pre amp!!
  105. 6C45Pi Microphone Preamp
  106. cf topology lessons... pls help
  107. Father's Cousin Louis's vintage 1920+ collection pictures!
  108. Tube Newbie needs help
  109. Need help
  110. Zytron Tubes
  111. Hapi2 Preamp
  112. Svetlana Cryo Tubes For Wave 8's
  113. Audio Note Preamp Circuit a good guess...
  114. Which one is the better design?
  115. Lab Power Supply for Glass Audio
  116. A joke?
  117. Need Advice on new Amp
  118. Using the 7591 or 7868
  119. Schematic of Audio Research VT 100
  120. Hermetically sealed Oil Filled resistors!
  121. Pre Amp schematic Audio Note M1
  122. opt impedance
  123. Schematic for Bogen DB130 ?
  124. SRPP Help Needed
  125. Schematic for Bogen DB130 ?
  126. Hot tube
  127. 6L6 Design Phase
  128. High Power Single Ended Amplifier Club
  129. Suggestions please..
  130. These are the best looking tube amps I have ever seen
  131. Sylvania News
  132. Will this work? "Mixed" 300B PPP IT
  133. Whats a Good 6L6 circuit?
  134. Guitar Tube Preamp
  135. Circlotron amps
  136. Mods on leak stereo 20
  137. When do the tubes have a fever?
  138. psu problem
  139. earthing
  140. 6V6 SET amp with 6SN7 driver
  141. 6n1p pre with active load
  142. buy tubes in the EU
  143. Neutral AC wave on O'scope
  144. Running power to tubes so as not to effect the audio signal
  145. el34 se schematic opinion
  146. Ef86
  147. A Rimbaldi amp?
  148. SE or PP?
  149. PP 807's
  150. CCS loading first stage of DC coupled driver
  151. Search for a pre (RIAA+LINE+TUNER)with 12au7-12ax7.
  152. Film cap's
  153. Goertz: amp killer? or where to fix my Audio Research VSi55?
  154. help finding a good amp project?
  155. Yet another valve pre, comments?!
  156. Source for round and/or square transformer covers ??
  157. Ac30
  158. Some questions!
  159. filament source connection to DHT
  160. Use tubes for 2000V. power supply,
  161. mu / srpp / or CF?
  162. dB into voltage gain????
  163. Building a Tube Mic Pre
  164. Negative Voltage using tube rectifier?
  165. Reichert info
  166. really basic question
  167. Has anybody built 6BG6 or similar OTL amp?
  168. Old OP Transformer
  169. Need Advice, 820vct tranny?
  170. 811a Tube Cap Size
  171. need help with (now) not-working amp
  172. How about this 12au7 pre?
  173. SV811-3 SE : Lots of questions...
  174. Criticise please!
  175. 6n3p = ECC85 ???
  176. Any website reference for diy Audio Research REFERENCE amp and Manley Studio amp
  177. grid bias
  178. 12AT7 poweramp specs?
  179. valve pre amp
  180. what is the simplest possible triode amp?
  181. poweramp topology
  182. limits in transient time
  183. OPT Design
  184. Would this work
  185. manley pre schematic
  186. Heathkit FM3A
  187. Aleph-type CCS as plate load?
  188. Talbot Wright's Williamson mod (Heathkit W3-AM)
  189. Conrad-Johnson PV6 Preamp
  190. Mc275 opt manual rewinding
  191. Newbie asking help
  192. converting EF86 to take 12AX7
  193. B&K 650 tube tester not working, need help
  194. 5814/12AU7 Preamp?
  195. Grounded Grid pre amp-- help please
  196. Tube output indicator - EM84 or 6AF6G
  197. suggest circuit with gain of 60
  198. ready to mod the hell out of my asl wave 8's
  199. My First DIY - need big help!
  200. rectifier tube question
  201. Newbie with Tannoy grfs, helpme to choice a good amp to them.
  202. Mullard CV 4109 tube
  203. Pre PS Improvements?
  204. 6n7gt+300b
  205. Calculating DC coupled Single Ended Valve Amplifiers - Part #1
  206. 12ax7 preamp,need help.
  207. tube datasheets and amp sch
  208. How to check output transformers ?
  209. Filament of a 6AS7G
  210. triode=>pentode
  211. noob PSUD question...
  212. Detailed and Dry.
  213. Audion sterling phono stage - a good base for future upgrades?
  214. First Try on Tube Preamp
  215. EL34 in class AB2 triode mode push-pull?
  216. Heater Voltage Range, Hi or Low
  217. Donor H/K A224 Amp
  218. market for used tubes?
  219. Voltage Doubler Problem
  220. 6922 as a CCS, a question ?
  221. ALPS Pot
  222. Tube parameter ?
  223. tube life
  224. 7591A Tubes for sale?
  225. Restoring tired tubes
  226. My Bottlehead Tube Rig is done...for now
  227. Hammond Transformers
  228. Kenwood KW-70 Receiver
  229. Tube output buffer for DAC....needs advice!
  230. The Crackerbox Amp
  231. Antique Sound Lab MG-SPM25 Output Transformers
  232. el84 quad schematic..something is wrong...?
  233. really dumb question about SE 6bq5 operating point (triode)
  234. 6n7gt
  235. EE-Zee & Chee-Zee bias and offset adjustment idea
  236. Preamp Selection
  237. High frecuency oscillation when moving volume pot
  238. Choke load - how to plot loadline?
  239. Audio Research LS2
  240. Any Tube DIYers in Bay Area
  241. 6DJ8 preamp voltage?
  242. Diodes in Grid-Cathode Circuit
  243. To regulate or not?
  244. Odd tube behavior
  245. output txfr on cathode?
  246. tube preamp w/ XLR?
  247. ECC88 and PCC88 filament voltages
  248. Best tube choice for 1st SET project?
  249. Croft Vitale
  250. at last, amp finnished

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