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  1. B&K 650 tube tester not working, need help
  2. 5814/12AU7 Preamp?
  3. Grounded Grid pre amp-- help please
  4. Tube output indicator - EM84 or 6AF6G
  5. suggest circuit with gain of 60
  6. ready to mod the hell out of my asl wave 8's
  7. My First DIY - need big help!
  8. rectifier tube question
  9. Newbie with Tannoy grfs, helpme to choice a good amp to them.
  10. Mullard CV 4109 tube
  11. Pre PS Improvements?
  12. 6n7gt+300b
  13. Calculating DC coupled Single Ended Valve Amplifiers - Part #1
  14. 12ax7 preamp,need help.
  15. tube datasheets and amp sch
  16. How to check output transformers ?
  17. Filament of a 6AS7G
  18. triode=>pentode
  19. noob PSUD question...
  20. Detailed and Dry.
  21. Audion sterling phono stage - a good base for future upgrades?
  22. First Try on Tube Preamp
  23. EL34 in class AB2 triode mode push-pull?
  24. Heater Voltage Range, Hi or Low
  25. Donor H/K A224 Amp
  26. market for used tubes?
  27. Voltage Doubler Problem
  28. 6922 as a CCS, a question ?
  29. ALPS Pot
  30. Tube parameter ?
  31. tube life
  32. 7591A Tubes for sale?
  33. Restoring tired tubes
  34. My Bottlehead Tube Rig is done...for now
  35. Hammond Transformers
  36. Kenwood KW-70 Receiver
  37. Tube output buffer for DAC....needs advice!
  38. The Crackerbox Amp
  39. Antique Sound Lab MG-SPM25 Output Transformers
  40. el84 quad schematic..something is wrong...?
  41. really dumb question about SE 6bq5 operating point (triode)
  42. 6n7gt
  43. EE-Zee & Chee-Zee bias and offset adjustment idea
  44. Preamp Selection
  45. High frecuency oscillation when moving volume pot
  46. Choke load - how to plot loadline?
  47. Audio Research LS2
  48. Any Tube DIYers in Bay Area
  49. 6DJ8 preamp voltage?
  50. Diodes in Grid-Cathode Circuit
  51. To regulate or not?
  52. Odd tube behavior
  53. output txfr on cathode?
  54. tube preamp w/ XLR?
  55. ECC88 and PCC88 filament voltages
  56. Best tube choice for 1st SET project?
  57. Croft Vitale
  58. at last, amp finnished
  59. Silver micas as coupling caps?
  60. Valve-Heart Recording Studio
  61. Prototyping ( Breadboard ) Chassis Ideas and Suggestions
  62. old tubes
  63. where to place extra filter cap
  64. Troubleshooting a 6n1p linestage.
  65. 300BSE series
  66. Which triode is the best for preamp?
  67. AV8 and AV15 Vaic tubes
  68. Refridgerator trying to kill my Valve Amp
  69. When is capacitance making AC ripple a non-issue in B+ PS's?
  70. Quicksilver Bias Problem
  71. Looking for good book about phase split
  72. speaker protection fuse in Transcendent T8
  73. Shuguang Tube Factory(pics)
  74. "Pentodes for Dummies" needed.
  75. schematic for audio research classic 120 amps?
  76. Bouncing Ground
  77. Testing response....
  78. Impedance selection
  79. Heater To Cathode Potential
  80. uneven wound 50w OT 2 ideas...?
  81. 6B4G Amplifier Questions
  82. grounding heater/filament center
  83. Do I lose power when parafeeding?
  84. no ground problem
  85. Tube amp project
  86. bi-amping with gainclone + tubeamp
  87. Plitron/Vanderveen/KT88 Tube rectifier recommendation for 230mA?
  88. proposed 833 design
  89. Thyratron Circuit
  90. different phase invertors
  91. Tetrode or Pentode? / Tube info
  92. RECTIFIERLESS, is that possible?
  93. About high voltage regulated power supplies
  94. Stupid question about capacitors
  95. Time advanced error feedback correction
  96. My first tube amp
  97. copland 504
  98. 6D22S Damper Tubes
  99. resuscitating 60+ year old radio
  100. 6C45 in a phono amp? looks like this might be hot.
  101. quality of power supply
  102. Gassy Tube
  103. transformer coupling, magnetic amplifiers, grid leak current
  104. How low 6922/ECC88 can go?
  105. Question about PP EL34 power supply behaviour
  106. Tube amps and electric safety
  107. Transformer for a tube amp question
  108. Need some info on E88CC/6922
  109. strange "thing"
  110. Extra gain stage Marshall plexi 50watt
  111. Help with Hickok 539A tube tester repair..
  112. Micing tube amps
  113. Tube preamp huge DC thump!
  114. New speaker for transcendent T8
  115. choke winding
  116. MC phono preamp
  117. KYW's linestage (split from RIAA for life time)
  118. output transformer spice model
  119. cathode connection in directly heated triodes
  120. 50watt Plexi Again
  121. Anyone use ICs as input phase splitters for tube equipment
  122. Tube Sockets
  123. RIAA and Linestage for life time
  124. 211 Preamp
  125. Building a Marshall Plexi
  126. PL504 circuits.
  127. Tube Recommendation
  128. 6.3v 30A!?
  129. Simplest 6080 or 6AS7 OTL Project?
  130. Is 6N1P = 6N7 = ECC31
  131. EL34 in Pentode Class A?
  132. Wiring a 12au7
  133. BLue hue
  134. Choosing a suitable 50W cathode resistor
  135. 5687
  136. heathkit Schematic
  137. Precision S100 schematics?
  138. my RIAA stage. Any comment
  139. buffer circuits
  140. switchable 2.5k/5k primary ot
  141. Old grundig 3095 radio
  142. DIY Single Ended Triode Designs
  143. dog whistle
  144. Volume pot question
  145. Oil PP Cap
  146. commercial tube preamps
  147. Transformer Cover
  148. Harman-Kardon A-300 Amplifier
  149. Phono preamp- how to modify to get deeper LF?
  150. Thyratron heater supply?
  151. amp conversions
  152. Looking for Scott 200 photofacts or service manual
  153. 6ag7 metal pentodes
  154. EL84 Push-Pull Vieta A-225 opinion
  155. 5998 power amp question
  156. Which rectifier tube?
  157. tube preamp
  158. 6GT5 distortion problem
  159. tube preamps and gain
  160. Cathode Follower? Yay or nay?
  161. what the crap is this!?
  162. Safety Practices, General and Ultra-High Voltage
  163. Output transformer issues...
  164. Tube sockets with the same pin spacing as the tube
  165. Help needed with preamp.
  166. VSE RTP5 linestage comments
  167. VSE RTP5 linestage comments
  168. Futterman OTL ferrite bead specification
  169. common anode capacitor for both sections
  170. How good are cheap tranny-interstages
  171. Favorite bias measuring and metering methods?
  172. Suitable regulated/filtered 4volt battery-valve power supply suitable for 6+ valves?
  173. Newbie Transformer Secondary Combination Qs--Plitron Example
  174. Zenith Wavemagnet Help Please !!!
  175. Audio research vs55/VT50/VT100
  176. quad 6bm8 per channel
  177. Tubes from St.Petersburg, Russia?
  178. Tube preamplifier
  179. Seeking suggestions on slowing B+ turn on
  180. Help on Brute force
  181. 6SL7 or 12AX7 in Kimmel OTL
  182. What´s wrong with Hammond 1628SE?
  183. Input stages - to decouple B+ or not?
  184. valve info? NEC 30M-P25
  185. Recommended sources for SED EL 34s
  186. Golden Middle output transformers
  187. Help needed on tube rectification.
  188. NWWA DIY Audio Meet 2004
  189. Audio Research V70
  190. PSU choke value
  191. 4 Ohm on 25v Tap?
  192. The MDF amp chassis discusion reminds me...
  193. Tubed-out guitar affects
  194. SE used as step down OT
  195. Siemens E83f
  196. Enclosures in MDF.
  197. Tube tester and noise test
  198. Sovtek KT88 specifications not found :(
  199. Fisher 800C FM Stereo problem
  200. Soliciting Enthusiastic Recommendations for 50+WPC Kit or Design
  201. EL519/KT90 The old debate
  202. Plasma/ionic
  203. Another Fender on the bench.
  204. How much voltage won't kill me?
  205. Pcl84 / 15dq8
  206. Alliance Audio
  207. Opinions of Menno Vanderveen ( van der Veen ) PP Amps, Esp. Super-Triode
  208. Supertotem
  209. neon bulbs as grid voltage clamps
  210. Large caps in PSU without choke?
  211. Tube rectifier ?s
  212. resistors, capacitors, etc. NEED MORE INFO!
  213. Recitifaction is a pain in the butt? A few lame questions
  214. Hook-up Wire?
  215. Using Telefunken "Tank" transfomers for a single ended el84 amp?
  216. cathode follower with gain
  217. Got sparks in my GZ34!
  218. Duncans PSU designer and tube rectifier.
  219. I want to make a simple UL PP amp
  220. Phase splitter questions
  221. I want dizzy, why can't my speech show?
  222. I come from China, giving the same friends in a fondness for
  223. I come from China, giving the same friends in a fondness for
  224. Choke value?
  225. line voltage level
  226. SRPP & DACs
  227. Tube ageing ?
  228. Changing caps for preamp
  229. 845 PP and Lundahl 1620
  230. schematic for a push pull EL 509
  231. 6N1P preamp too much gain...
  232. Looking for a great DIY-Preamp for MICs (48v)
  233. Miniature 8pin socket
  234. Mesa Boogie Dual Caliber DC-3 schematic?
  235. Please help my MC240
  236. Hammond 125ese cheap in Europe?
  237. Critique for circuit of great value 805 SET?
  238. SE OPT's & Biasing
  239. Compact All-In-One Chassis Design with good ventilation. And low noise, Not a Schemat
  240. Newbie First Amp
  241. Audio Note P-2
  242. 300b?
  243. Power Supply and VR tube help!
  244. Tubes for direct-driving ESL
  245. Question about popping Noise
  246. tube preamp...opinions
  247. Help! I need TRW(UTC) O35 DATA
  248. Is this a good tube DIY kit to get?
  249. Best AC Heater Practices
  250. new hybrid amp turn on circuit

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