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  1. My First DIY - need big help!
  2. rectifier tube question
  3. Newbie with Tannoy grfs, helpme to choice a good amp to them.
  4. Mullard CV 4109 tube
  5. Pre PS Improvements?
  6. 6n7gt+300b
  7. Calculating DC coupled Single Ended Valve Amplifiers - Part #1
  8. 12ax7 preamp,need help.
  9. tube datasheets and amp sch
  10. How to check output transformers ?
  11. Filament of a 6AS7G
  12. triode=>pentode
  13. noob PSUD question...
  14. Detailed and Dry.
  15. Audion sterling phono stage - a good base for future upgrades?
  16. First Try on Tube Preamp
  17. EL34 in class AB2 triode mode push-pull?
  18. Heater Voltage Range, Hi or Low
  19. Donor H/K A224 Amp
  20. market for used tubes?
  21. Voltage Doubler Problem
  22. 6922 as a CCS, a question ?
  23. ALPS Pot
  24. Tube parameter ?
  25. tube life
  26. 7591A Tubes for sale?
  27. Restoring tired tubes
  28. My Bottlehead Tube Rig is done...for now
  29. Hammond Transformers
  30. Kenwood KW-70 Receiver
  31. Tube output buffer for DAC....needs advice!
  32. The Crackerbox Amp
  33. Antique Sound Lab MG-SPM25 Output Transformers
  34. el84 quad schematic..something is wrong...?
  35. really dumb question about SE 6bq5 operating point (triode)
  36. 6n7gt
  37. EE-Zee & Chee-Zee bias and offset adjustment idea
  38. Preamp Selection
  39. High frecuency oscillation when moving volume pot
  40. Choke load - how to plot loadline?
  41. Audio Research LS2
  42. Any Tube DIYers in Bay Area
  43. 6DJ8 preamp voltage?
  44. Diodes in Grid-Cathode Circuit
  45. To regulate or not?
  46. Odd tube behavior
  47. output txfr on cathode?
  48. tube preamp w/ XLR?
  49. ECC88 and PCC88 filament voltages
  50. Best tube choice for 1st SET project?
  51. Croft Vitale
  52. at last, amp finnished
  53. Silver micas as coupling caps?
  54. Valve-Heart Recording Studio
  55. Prototyping ( Breadboard ) Chassis Ideas and Suggestions
  56. old tubes
  57. where to place extra filter cap
  58. Troubleshooting a 6n1p linestage.
  59. 300BSE series
  60. Which triode is the best for preamp?
  61. AV8 and AV15 Vaic tubes
  62. Refridgerator trying to kill my Valve Amp
  63. When is capacitance making AC ripple a non-issue in B+ PS's?
  64. Quicksilver Bias Problem
  65. Looking for good book about phase split
  66. speaker protection fuse in Transcendent T8
  67. Shuguang Tube Factory(pics)
  68. "Pentodes for Dummies" needed.
  69. schematic for audio research classic 120 amps?
  70. Bouncing Ground
  71. Testing response....
  72. Impedance selection
  73. Heater To Cathode Potential
  74. uneven wound 50w OT 2 ideas...?
  75. 6B4G Amplifier Questions
  76. grounding heater/filament center
  77. Do I lose power when parafeeding?
  78. no ground problem
  79. Tube amp project
  80. bi-amping with gainclone + tubeamp
  81. Plitron/Vanderveen/KT88 Tube rectifier recommendation for 230mA?
  82. proposed 833 design
  83. Thyratron Circuit
  84. different phase invertors
  85. Tetrode or Pentode? / Tube info
  86. RECTIFIERLESS, is that possible?
  87. About high voltage regulated power supplies
  88. Stupid question about capacitors
  89. Time advanced error feedback correction
  90. My first tube amp
  91. copland 504
  92. 6D22S Damper Tubes
  93. resuscitating 60+ year old radio
  94. 6C45 in a phono amp? looks like this might be hot.
  95. quality of power supply
  96. Gassy Tube
  97. transformer coupling, magnetic amplifiers, grid leak current
  98. How low 6922/ECC88 can go?
  99. Question about PP EL34 power supply behaviour
  100. Tube amps and electric safety
  101. Transformer for a tube amp question
  102. Need some info on E88CC/6922
  103. strange "thing"
  104. Extra gain stage Marshall plexi 50watt
  105. Help with Hickok 539A tube tester repair..
  106. Micing tube amps
  107. Tube preamp huge DC thump!
  108. New speaker for transcendent T8
  109. choke winding
  110. MC phono preamp
  111. KYW's linestage (split from RIAA for life time)
  112. output transformer spice model
  113. cathode connection in directly heated triodes
  114. 50watt Plexi Again
  115. Anyone use ICs as input phase splitters for tube equipment
  116. Tube Sockets
  117. RIAA and Linestage for life time
  118. 211 Preamp
  119. Building a Marshall Plexi
  120. PL504 circuits.
  121. Tube Recommendation
  122. 6.3v 30A!?
  123. Simplest 6080 or 6AS7 OTL Project?
  124. Is 6N1P = 6N7 = ECC31
  125. EL34 in Pentode Class A?
  126. Wiring a 12au7
  127. BLue hue
  128. Choosing a suitable 50W cathode resistor
  129. 5687
  130. heathkit Schematic
  131. Precision S100 schematics?
  132. my RIAA stage. Any comment
  133. buffer circuits
  134. switchable 2.5k/5k primary ot
  135. Old grundig 3095 radio
  136. DIY Single Ended Triode Designs
  137. dog whistle
  138. Volume pot question
  139. Oil PP Cap
  140. commercial tube preamps
  141. Transformer Cover
  142. Harman-Kardon A-300 Amplifier
  143. Phono preamp- how to modify to get deeper LF?
  144. Thyratron heater supply?
  145. amp conversions
  146. Looking for Scott 200 photofacts or service manual
  147. 6ag7 metal pentodes
  148. EL84 Push-Pull Vieta A-225 opinion
  149. 5998 power amp question
  150. Which rectifier tube?
  151. tube preamp
  152. 6GT5 distortion problem
  153. tube preamps and gain
  154. Cathode Follower? Yay or nay?
  155. what the crap is this!?
  156. Safety Practices, General and Ultra-High Voltage
  157. Output transformer issues...
  158. Tube sockets with the same pin spacing as the tube
  159. Help needed with preamp.
  160. VSE RTP5 linestage comments
  161. VSE RTP5 linestage comments
  162. Futterman OTL ferrite bead specification
  163. common anode capacitor for both sections
  164. How good are cheap tranny-interstages
  165. Favorite bias measuring and metering methods?
  166. Suitable regulated/filtered 4volt battery-valve power supply suitable for 6+ valves?
  167. Newbie Transformer Secondary Combination Qs--Plitron Example
  168. Zenith Wavemagnet Help Please !!!
  169. Audio research vs55/VT50/VT100
  170. quad 6bm8 per channel
  171. Tubes from St.Petersburg, Russia?
  172. Tube preamplifier
  173. Seeking suggestions on slowing B+ turn on
  174. Help on Brute force
  175. 6SL7 or 12AX7 in Kimmel OTL
  176. What´s wrong with Hammond 1628SE?
  177. Input stages - to decouple B+ or not?
  178. valve info? NEC 30M-P25
  179. Recommended sources for SED EL 34s
  180. Golden Middle output transformers
  181. Help needed on tube rectification.
  182. NWWA DIY Audio Meet 2004
  183. Audio Research V70
  184. PSU choke value
  185. 4 Ohm on 25v Tap?
  186. The MDF amp chassis discusion reminds me...
  187. Tubed-out guitar affects
  188. SE used as step down OT
  189. Siemens E83f
  190. Enclosures in MDF.
  191. Tube tester and noise test
  192. Sovtek KT88 specifications not found :(
  193. Fisher 800C FM Stereo problem
  194. Soliciting Enthusiastic Recommendations for 50+WPC Kit or Design
  195. EL519/KT90 The old debate
  196. Plasma/ionic
  197. Another Fender on the bench.
  198. How much voltage won't kill me?
  199. Pcl84 / 15dq8
  200. Alliance Audio
  201. Opinions of Menno Vanderveen ( van der Veen ) PP Amps, Esp. Super-Triode
  202. Supertotem
  203. neon bulbs as grid voltage clamps
  204. Large caps in PSU without choke?
  205. Tube rectifier ?s
  206. resistors, capacitors, etc. NEED MORE INFO!
  207. Recitifaction is a pain in the butt? A few lame questions
  208. Hook-up Wire?
  209. Using Telefunken "Tank" transfomers for a single ended el84 amp?
  210. cathode follower with gain
  211. Got sparks in my GZ34!
  212. Duncans PSU designer and tube rectifier.
  213. I want to make a simple UL PP amp
  214. Phase splitter questions
  215. I want dizzy, why can't my speech show?
  216. I come from China, giving the same friends in a fondness for
  217. I come from China, giving the same friends in a fondness for
  218. Choke value?
  219. line voltage level
  220. SRPP & DACs
  221. Tube ageing ?
  222. Changing caps for preamp
  223. 845 PP and Lundahl 1620
  224. schematic for a push pull EL 509
  225. 6N1P preamp too much gain...
  226. Looking for a great DIY-Preamp for MICs (48v)
  227. Miniature 8pin socket
  228. Mesa Boogie Dual Caliber DC-3 schematic?
  229. Please help my MC240
  230. Hammond 125ese cheap in Europe?
  231. Critique for circuit of great value 805 SET?
  232. SE OPT's & Biasing
  233. Compact All-In-One Chassis Design with good ventilation. And low noise, Not a Schemat
  234. Newbie First Amp
  235. Audio Note P-2
  236. 300b?
  237. Power Supply and VR tube help!
  238. Tubes for direct-driving ESL
  239. Question about popping Noise
  240. tube preamp...opinions
  241. Help! I need TRW(UTC) O35 DATA
  242. Is this a good tube DIY kit to get?
  243. Best AC Heater Practices
  244. new hybrid amp turn on circuit
  245. dc phono
  246. screen-plate resistor and grid leak resistor
  247. Kr842vhd
  248. DRD 300b amplifier sound quality?
  249. Pre-amp selection
  250. tube buffer for TDA1543 based dac

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