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  1. EL84 or 6v6 or something else?
  2. Borbely hybrid phono
  3. SS power supply question
  4. RCA Tube Radio...circa 1930-40
  5. New project on 807
  6. SE design using 10k OPTs
  7. Biasing a cathode follower?
  8. Lower Distortion Alternatives to 12AT7 & 12AU7 ?
  9. Oil in Paper in oil capacitor.
  10. Valves for Crackly Fender Hot Rod
  11. Information needed
  12. Hybrid
  13. heavy metal, low power guitar amp?
  14. found two boxes of GE 6CL6 tubes
  15. Please help me compare 2 cattle of fish...
  16. Vacuum Tube Valley 6SN7 preamp
  17. SET Power Supply Regulation
  18. TubeCAD
  19. 60 Hz noise in modified Audible Illusions M2B
  20. Anodized Aluminum and Glue/Epoxy
  21. shared parts between channels
  22. May I use 5K transformer for Dynaco III amp?
  23. First amp build questions
  24. Help needed changing from srpp5814a to srpp12bh7a
  25. ok, i'll try and make it simple.
  26. Sure, copy an amp. . . It'd work but I'm looking for something different.
  27. Half a bee Philosophically. . . Er sorry Its actually about ECC83 amps
  28. Bogan schematic for HO 50 power Amp
  29. Gibson GA-15RV tube amp
  30. Can VT-185 be applied in audio circuit?
  31. Best PP transformer for 2A3 amp?
  32. help in finding tubetester meter value
  33. B+ Voltage
  34. CCS Conceptual Qs, Using Gary Pimm CCS as Example
  35. Is there a no/gain preamplifier schematic using high-distortion EC90?
  36. marshall jcm hifi?
  37. Klystron??
  38. single ended 2a3 project
  39. Visit Shuguang tube factory(many pics)
  40. AKAI M8 Tube R-R input problem
  41. How do Sovtek 6L6WGCs stand up?
  42. Hammond SE Transformer question
  43. Tube Safety
  44. old console
  45. AB1 or 2?
  46. help with restoring amp
  47. Tube preamplifier with PCC88
  48. Tube amplifier 300b proyect
  49. linestage needed
  50. 5687 Tube - best choice
  51. Fisher 500c - Trouble shooting tuner section
  52. Morgan Jones book to swap
  53. gu-48 PP
  54. Taylor 45b Gm Problem
  55. 5687, ECC99, 7119, or E182CC??
  56. Bell Sound Systems Old Gem
  57. Mu-follower current capability?
  58. Bogen M330A Tube PA Amp for Guitar
  59. Filaments voltage question
  60. Is it Good to regulate supplies?
  61. Damper Diodes
  62. Fisher X-100 transformers
  63. Some questions about C4S CCS adjustment.
  64. Lowther LL18S stereo power amplifier - circuit diagram?
  65. Problem with mouting choke underneath chassis?
  66. How accurate is RMAA distortion measurement?
  67. 801
  68. CROFT Eminent Audio
  69. Any good flea-watt SET designs?
  70. PTP wiring
  71. switching regulators
  72. Push Pull Power supply. to Tube or not to?
  73. Kepco 615B Bench Supply pix
  74. Standart gains and voltage levels for standart audio eq
  75. How do I measure OPT impedance?
  76. Using TFA 204 transformers for SE EL84?
  77. Help on 311-CH triode tube
  78. Shots of my GG pre amp!!
  79. 6C45Pi Microphone Preamp
  80. cf topology lessons... pls help
  81. Father's Cousin Louis's vintage 1920+ collection pictures!
  82. Tube Newbie needs help
  83. Need help
  84. Zytron Tubes
  85. Hapi2 Preamp
  86. Svetlana Cryo Tubes For Wave 8's
  87. Audio Note Preamp Circuit a good guess...
  88. Which one is the better design?
  89. Lab Power Supply for Glass Audio
  90. A joke?
  91. Need Advice on new Amp
  92. Using the 7591 or 7868
  93. Schematic of Audio Research VT 100
  94. Hermetically sealed Oil Filled resistors!
  95. Pre Amp schematic Audio Note M1
  96. opt impedance
  97. Schematic for Bogen DB130 ?
  98. SRPP Help Needed
  99. Schematic for Bogen DB130 ?
  100. Hot tube
  101. 6L6 Design Phase
  102. High Power Single Ended Amplifier Club
  103. Suggestions please..
  104. These are the best looking tube amps I have ever seen
  105. Sylvania News
  106. Will this work? "Mixed" 300B PPP IT
  107. Whats a Good 6L6 circuit?
  108. Guitar Tube Preamp
  109. Circlotron amps
  110. Mods on leak stereo 20
  111. When do the tubes have a fever?
  112. psu problem
  113. earthing
  114. 6V6 SET amp with 6SN7 driver
  115. 6n1p pre with active load
  116. buy tubes in the EU
  117. Neutral AC wave on O'scope
  118. Running power to tubes so as not to effect the audio signal
  119. el34 se schematic opinion
  120. EF86
  121. A Rimbaldi amp?
  122. SE or PP?
  123. PP 807's
  124. CCS loading first stage of DC coupled driver
  125. Search for a pre (RIAA+LINE+TUNER)with 12au7-12ax7.
  126. Film cap's
  127. Goertz: amp killer? or where to fix my Audio Research VSi55?
  128. help finding a good amp project?
  129. Yet another valve pre, comments?!
  130. Source for round and/or square transformer covers ??
  131. Ac30
  132. Some questions!
  133. filament source connection to DHT
  134. Use tubes for 2000V. power supply,
  135. mu / srpp / or CF?
  136. dB into voltage gain????
  137. Building a Tube Mic Pre
  138. Negative Voltage using tube rectifier?
  139. Reichert info
  140. really basic question
  141. Has anybody built 6BG6 or similar OTL amp?
  142. Old OP Transformer
  143. Need Advice, 820vct tranny?
  144. 811a Tube Cap Size
  145. need help with (now) not-working amp
  146. How about this 12au7 pre?
  147. SV811-3 SE : Lots of questions...
  148. Criticise please!
  149. 6n3p = ECC85 ???
  150. Any website reference for diy Audio Research REFERENCE amp and Manley Studio amp
  151. grid bias
  152. 12AT7 poweramp specs?
  153. valve pre amp
  154. what is the simplest possible triode amp?
  155. poweramp topology
  156. limits in transient time
  157. OPT Design
  158. Would this work
  159. manley pre schematic
  160. Heathkit FM3A
  161. Aleph-type CCS as plate load?
  162. Talbot Wright's Williamson mod (Heathkit W3-AM)
  163. Conrad-Johnson PV6 Preamp
  164. Mc275 opt manual rewinding
  165. Newbie asking help
  166. converting EF86 to take 12AX7
  167. B&K 650 tube tester not working, need help
  168. 5814/12AU7 Preamp?
  169. Grounded Grid pre amp-- help please
  170. Tube output indicator - EM84 or 6AF6G
  171. suggest circuit with gain of 60
  172. ready to mod the hell out of my asl wave 8's
  173. My First DIY - need big help!
  174. rectifier tube question
  175. Newbie with Tannoy grfs, helpme to choice a good amp to them.
  176. Mullard CV 4109 tube
  177. Pre PS Improvements?
  178. 6n7gt+300b
  179. Calculating DC coupled Single Ended Valve Amplifiers - Part #1
  180. 12ax7 preamp,need help.
  181. tube datasheets and amp sch
  182. How to check output transformers ?
  183. Filament of a 6AS7G
  184. triode=>pentode
  185. noob PSUD question...
  186. Detailed and Dry.
  187. Audion sterling phono stage - a good base for future upgrades?
  188. First Try on Tube Preamp
  189. EL34 in class AB2 triode mode push-pull?
  190. Heater Voltage Range, Hi or Low
  191. Donor H/K A224 Amp
  192. market for used tubes?
  193. Voltage Doubler Problem
  194. 6922 as a CCS, a question ?
  195. ALPS Pot
  196. Tube parameter ?
  197. tube life
  198. 7591A Tubes for sale?
  199. Restoring tired tubes
  200. My Bottlehead Tube Rig is done...for now
  201. Hammond Transformers
  202. Kenwood KW-70 Receiver
  203. Tube output buffer for DAC....needs advice!
  204. The Crackerbox Amp
  205. Antique Sound Lab MG-SPM25 Output Transformers
  206. el84 quad schematic..something is wrong...?
  207. really dumb question about SE 6bq5 operating point (triode)
  208. 6n7gt
  209. EE-Zee & Chee-Zee bias and offset adjustment idea
  210. Preamp Selection
  211. High frecuency oscillation when moving volume pot
  212. Choke load - how to plot loadline?
  213. Audio Research LS2
  214. Any Tube DIYers in Bay Area
  215. 6DJ8 preamp voltage?
  216. Diodes in Grid-Cathode Circuit
  217. To regulate or not?
  218. Odd tube behavior
  219. output txfr on cathode?
  220. tube preamp w/ XLR?
  221. ECC88 and PCC88 filament voltages
  222. Best tube choice for 1st SET project?
  223. Croft Vitale
  224. at last, amp finnished
  225. Silver micas as coupling caps?
  226. Valve-Heart Recording Studio
  227. Prototyping ( Breadboard ) Chassis Ideas and Suggestions
  228. old tubes
  229. where to place extra filter cap
  230. Troubleshooting a 6n1p linestage.
  231. 300BSE series
  232. Which triode is the best for preamp?
  233. AV8 and AV15 Vaic tubes
  234. Refridgerator trying to kill my Valve Amp
  235. When is capacitance making AC ripple a non-issue in B+ PS's?
  236. Quicksilver Bias Problem
  237. Looking for good book about phase split
  238. speaker protection fuse in Transcendent T8
  239. Shuguang Tube Factory(pics)
  240. "Pentodes for Dummies" needed.
  241. schematic for audio research classic 120 amps?
  242. Bouncing Ground
  243. Testing response....
  244. Impedance selection
  245. Heater To Cathode Potential
  246. uneven wound 50w OT 2 ideas...?
  247. 6B4G Amplifier Questions
  248. grounding heater/filament center
  249. Do I lose power when parafeeding?
  250. no ground problem

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