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  1. 5687
  2. heathkit Schematic
  3. Precision S100 schematics?
  4. my RIAA stage. Any comment
  5. buffer circuits
  6. switchable 2.5k/5k primary ot
  7. Old grundig 3095 radio
  8. DIY Single Ended Triode Designs
  9. dog whistle
  10. Volume pot question
  11. Oil PP Cap
  12. commercial tube preamps
  13. Transformer Cover
  14. Harman-Kardon A-300 Amplifier
  15. Phono preamp- how to modify to get deeper LF?
  16. Thyratron heater supply?
  17. amp conversions
  18. Looking for Scott 200 photofacts or service manual
  19. 6ag7 metal pentodes
  20. EL84 Push-Pull Vieta A-225 opinion
  21. 5998 power amp question
  22. Which rectifier tube?
  23. tube preamp
  24. 6GT5 distortion problem
  25. tube preamps and gain
  26. Cathode Follower? Yay or nay?
  27. what the crap is this!?
  28. Safety Practices, General and Ultra-High Voltage
  29. Output transformer issues...
  30. Tube sockets with the same pin spacing as the tube
  31. Help needed with preamp.
  32. VSE RTP5 linestage comments
  33. VSE RTP5 linestage comments
  34. Futterman OTL ferrite bead specification
  35. common anode capacitor for both sections
  36. How good are cheap tranny-interstages
  37. Favorite bias measuring and metering methods?
  38. Suitable regulated/filtered 4volt battery-valve power supply suitable for 6+ valves?
  39. Newbie Transformer Secondary Combination Qs--Plitron Example
  40. Zenith Wavemagnet Help Please !!!
  41. Audio research vs55/VT50/VT100
  42. quad 6bm8 per channel
  43. Tubes from St.Petersburg, Russia?
  44. Tube preamplifier
  45. Seeking suggestions on slowing B+ turn on
  46. Help on Brute force
  47. 6SL7 or 12AX7 in Kimmel OTL
  48. What´s wrong with Hammond 1628SE?
  49. Input stages - to decouple B+ or not?
  50. valve info? NEC 30M-P25
  51. Recommended sources for SED EL 34s
  52. Golden Middle output transformers
  53. Help needed on tube rectification.
  54. NWWA DIY Audio Meet 2004
  55. Audio Research V70
  56. PSU choke value
  57. 4 Ohm on 25v Tap?
  58. The MDF amp chassis discusion reminds me...
  59. Tubed-out guitar affects
  60. SE used as step down OT
  61. Siemens E83f
  62. Enclosures in MDF.
  63. Tube tester and noise test
  64. Sovtek KT88 specifications not found :(
  65. Fisher 800C FM Stereo problem
  66. Soliciting Enthusiastic Recommendations for 50+WPC Kit or Design
  67. EL519/KT90 The old debate
  68. Plasma/ionic
  69. Another Fender on the bench.
  70. How much voltage won't kill me?
  71. Pcl84 / 15dq8
  72. Alliance Audio
  73. Opinions of Menno Vanderveen ( van der Veen ) PP Amps, Esp. Super-Triode
  74. Supertotem
  75. neon bulbs as grid voltage clamps
  76. Large caps in PSU without choke?
  77. Tube rectifier ?s
  78. resistors, capacitors, etc. NEED MORE INFO!
  79. Recitifaction is a pain in the butt? A few lame questions
  80. Hook-up Wire?
  81. Using Telefunken "Tank" transfomers for a single ended el84 amp?
  82. cathode follower with gain
  83. Got sparks in my GZ34!
  84. Duncans PSU designer and tube rectifier.
  85. I want to make a simple UL PP amp
  86. Phase splitter questions
  87. I want dizzy, why can't my speech show?
  88. I come from China, giving the same friends in a fondness for
  89. I come from China, giving the same friends in a fondness for
  90. Choke value?
  91. line voltage level
  92. SRPP & DACs
  93. Tube ageing ?
  94. Changing caps for preamp
  95. 845 PP and Lundahl 1620
  96. schematic for a push pull EL 509
  97. 6N1P preamp too much gain...
  98. Looking for a great DIY-Preamp for MICs (48v)
  99. Miniature 8pin socket
  100. Mesa Boogie Dual Caliber DC-3 schematic?
  101. Please help my MC240
  102. Hammond 125ese cheap in Europe?
  103. Critique for circuit of great value 805 SET?
  104. SE OPT's & Biasing
  105. Compact All-In-One Chassis Design with good ventilation. And low noise, Not a Schemat
  106. Newbie First Amp
  107. Audio Note P-2
  108. 300b?
  109. Power Supply and VR tube help!
  110. Tubes for direct-driving ESL
  111. Question about popping Noise
  112. tube preamp...opinions
  113. Help! I need TRW(UTC) O35 DATA
  114. Is this a good tube DIY kit to get?
  115. Best AC Heater Practices
  116. new hybrid amp turn on circuit
  117. dc phono
  118. screen-plate resistor and grid leak resistor
  119. Kr842vhd
  120. DRD 300b amplifier sound quality?
  121. Pre-amp selection
  122. tube buffer for TDA1543 based dac
  123. Does anybody know if a WE404 (5847) would be able...
  124. Transformer Question
  125. New preamp
  126. Fisher 800c neg bias problem
  127. Seek your comments on 71a tube amp
  128. Single-Ended 6V6 Questions
  129. El509 Plate current question
  130. Building a Pre-Amplifier
  131. cathode bias in OTL??
  132. 10y-IT-10Y SE amp
  133. Any schematics for balanced line driver using 6922?
  134. Would you buy EI EL509/EL519 in an Octal Package?
  135. A Noisey CAT SL1 Reference
  136. Plate color and getter
  137. Learning to interpret the performance curves for KT88
  138. 811A in P.S.E or P/P
  139. Quick help needed! LOTs of noise in BBMCCCS loaded /0A2 regulated preamp!
  140. power output calculations, rated power and required power output
  141. Please help with Stancor A-4416
  142. transformers, read me!!!!
  143. Source for archive cd of Sound Practices Magazine
  144. PSE with 6C41C
  145. cathode follower
  146. Orientation and Horizontal Mounting
  147. Newbie on cathode curves
  148. transformers, regulation, triode-connection...
  149. 1st tube project - newbie tranny question
  150. NOS supply
  151. AN7 prototype- variation?
  152. Help needed with 805 sets
  153. controlling heat in tube amps.
  154. Suround Tube Amp?
  155. PSUD Model Hack
  156. advice about project wanted (newbie)
  157. Newly CCS circuit from Pimm
  158. simple matching philosophy on tubes..
  159. A good source for PIO & HV Resistors??
  160. ARC SP8 schematic
  161. some questions...
  162. 6KD6 For OTL??
  163. Rogers Cadet III PU Adapter
  164. G2-driven 6BM8
  165. Appropiate cabling quality & Regulators
  166. Tubes.Ru
  167. Buy 6C33 in Canada, where?
  168. A simple OTL??
  169. Allan Kimmel OTL
  170. sansui au111 output transformer
  171. JJ capacitors
  172. How many rectifiers?
  173. Can I use LT1083 as a CCS load?
  174. What front end for PP - triode, pentode, mu-stage or differential triodes?
  175. Electro-Harmonix 6SN7EH
  176. hehe
  177. Any DHT PX25 DIY user here???
  178. 6216 beam pentode question
  179. comments on this design..
  180. Parallel single ended or push-pull?
  181. amp measurements
  182. Extremely low power first amp problem
  183. Are these Caps any good?
  184. ...in SE mode !
  185. Simple 6BM8 at Evolve Power Amps?
  186. Newbie needs help. Basic PSU design and choke question.
  187. Audio Innovations 800 (series 2)
  188. 12B4A PP schematic
  189. Breakdown between solder tags?
  190. Caps topology
  191. questions about tubeamp building
  192. Antonio Tucci
  193. Choke Load or WOT
  194. Amp identification wanted
  195. tubes or not..!
  196. Vitreous Enamel vs Wirewound Resistor
  197. Will Simple 5687 or Etude 12b4A drive headphones?
  198. For Info: We91 Fans
  199. Just finished my new 300B amp
  200. tape alignment hell
  201. caps for RIAA network
  202. tube based CCS
  203. Tube brands.. who is best/most popular..
  204. Vintage Oil Caps
  205. Please critique this 2A3 SE schematic!
  206. KT-88 Ella amplifier, how to lower noise?
  207. PSU2 and power transformer question.
  208. Possible to make a KT88 PP UL schemat OTL ?
  209. Using 12 EL519 for T8
  210. what film capacitors do you use?
  211. 6550, kt88's at 600+ Volts
  212. circuit diagram to build my DIY preamp
  213. The rule to calculate the load impedance of two or more valvces connected in parallel
  214. no capacitors!
  215. SJS SE 300B with Interstage Transformer Mk2
  216. Differential input stage for T8 OTL-OCL from newbie
  217. Scott LK72 output transformer quality ?
  218. Van Scoyoc SRPP Amp - GvT
  219. Newbie/Guitar Amp BOOK recommendation
  220. Hammond PT and KT88 Design costs.
  221. direct coupling
  222. NFB question
  223. ebooks/online literature...
  224. First time tube jitters...
  225. Audio Note Kageki vs. EAR 859 vs. Audio Innovations: The First
  226. Where is the best place to add tubes in this system?
  227. Anyone seen one?
  228. newbie and i mean new
  229. Differential amp, Long tail, Split load - what difference in sonics?
  230. IC geometry
  231. Fully silver hard wired
  232. Possible damage of a 5AS4 full-wave rect...
  233. direct coupling
  234. Good 6L6 schematic needed
  235. I could lose some heat - suggestions?
  236. Svetlana Svetlana EL509-II: Please disregard all my statements about this tube!
  237. help using Tube Tester
  238. @Tanberg owners. help needed..
  239. Electro Harmonix KT90 after 200hrs use
  240. Need suggestions on tube regulator.
  241. EAR 859 questions
  242. First build from scratch.
  243. Tanberg design..
  244. How to use Russian tube 6H6
  245. Are Svet EL509s really EL509s?
  246. Resistors and Capacitors
  247. simple design power amp.. wanted.
  248. SJS SE108Mk2 Amplifier layout.
  249. Free Auctions?
  250. measuring wattage?

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