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  1. SRPP & DACs
  2. Tube ageing ?
  3. Changing caps for preamp
  4. 845 PP and Lundahl 1620
  5. schematic for a push pull EL 509
  6. 6N1P preamp too much gain...
  7. Looking for a great DIY-Preamp for MICs (48v)
  8. Miniature 8pin socket
  9. Mesa Boogie Dual Caliber DC-3 schematic?
  10. Please help my MC240
  11. Hammond 125ese cheap in Europe?
  12. Critique for circuit of great value 805 SET?
  13. SE OPT's & Biasing
  14. Compact All-In-One Chassis Design with good ventilation. And low noise, Not a Schemat
  15. Newbie First Amp
  16. Audio Note P-2
  17. 300b?
  18. Power Supply and VR tube help!
  19. Tubes for direct-driving ESL
  20. Question about popping Noise
  21. tube preamp...opinions
  22. Help! I need TRW(UTC) O35 DATA
  23. Is this a good tube DIY kit to get?
  24. Best AC Heater Practices
  25. new hybrid amp turn on circuit
  26. dc phono
  27. screen-plate resistor and grid leak resistor
  28. Kr842vhd
  29. DRD 300b amplifier sound quality?
  30. Pre-amp selection
  31. tube buffer for TDA1543 based dac
  32. Does anybody know if a WE404 (5847) would be able...
  33. Transformer Question
  34. New preamp
  35. Fisher 800c neg bias problem
  36. Seek your comments on 71a tube amp
  37. Single-Ended 6V6 Questions
  38. El509 Plate current question
  39. Building a Pre-Amplifier
  40. cathode bias in OTL??
  41. 10y-IT-10Y SE amp
  42. Any schematics for balanced line driver using 6922?
  43. Would you buy EI EL509/EL519 in an Octal Package?
  44. A Noisey CAT SL1 Reference
  45. Plate color and getter
  46. Learning to interpret the performance curves for KT88
  47. 811A in P.S.E or P/P
  48. Quick help needed! LOTs of noise in BBMCCCS loaded /0A2 regulated preamp!
  49. power output calculations, rated power and required power output
  50. Please help with Stancor A-4416
  51. transformers, read me!!!!
  52. Source for archive cd of Sound Practices Magazine
  53. PSE with 6C41C
  54. cathode follower
  55. Orientation and Horizontal Mounting
  56. Newbie on cathode curves
  57. transformers, regulation, triode-connection...
  58. 1st tube project - newbie tranny question
  59. NOS supply
  60. AN7 prototype- variation?
  61. Help needed with 805 sets
  62. controlling heat in tube amps.
  63. Suround Tube Amp?
  64. PSUD Model Hack
  65. advice about project wanted (newbie)
  66. Newly CCS circuit from Pimm
  67. simple matching philosophy on tubes..
  68. A good source for PIO & HV Resistors??
  69. ARC SP8 schematic
  70. some questions...
  71. 6KD6 For OTL??
  72. Rogers Cadet III PU Adapter
  73. G2-driven 6BM8
  74. Appropiate cabling quality & Regulators
  75. Tubes.Ru
  76. Buy 6C33 in Canada, where?
  77. A simple OTL??
  78. Allan Kimmel OTL
  79. sansui au111 output transformer
  80. JJ capacitors
  81. How many rectifiers?
  82. Can I use LT1083 as a CCS load?
  83. What front end for PP - triode, pentode, mu-stage or differential triodes?
  84. Electro-Harmonix 6SN7EH
  85. hehe
  86. Any DHT PX25 DIY user here???
  87. 6216 beam pentode question
  88. comments on this design..
  89. Parallel single ended or push-pull?
  90. amp measurements
  91. Extremely low power first amp problem
  92. Are these Caps any good?
  93. ...in SE mode !
  94. Simple 6BM8 at Evolve Power Amps?
  95. Newbie needs help. Basic PSU design and choke question.
  96. Audio Innovations 800 (series 2)
  97. 12B4A PP schematic
  98. Breakdown between solder tags?
  99. Caps topology
  100. questions about tubeamp building
  101. Antonio Tucci
  102. Choke Load or WOT
  103. Amp identification wanted
  104. tubes or not..!
  105. Vitreous Enamel vs Wirewound Resistor
  106. Will Simple 5687 or Etude 12b4A drive headphones?
  107. For Info: We91 Fans
  108. Just finished my new 300B amp
  109. tape alignment hell
  110. caps for RIAA network
  111. tube based CCS
  112. Tube brands.. who is best/most popular..
  113. Vintage Oil Caps
  114. Please critique this 2A3 SE schematic!
  115. KT-88 Ella amplifier, how to lower noise?
  116. PSU2 and power transformer question.
  117. Possible to make a KT88 PP UL schemat OTL ?
  118. Using 12 EL519 for T8
  119. what film capacitors do you use?
  120. 6550, kt88's at 600+ Volts
  121. circuit diagram to build my DIY preamp
  122. The rule to calculate the load impedance of two or more valvces connected in parallel
  123. no capacitors!
  124. SJS SE 300B with Interstage Transformer Mk2
  125. Differential input stage for T8 OTL-OCL from newbie
  126. Scott LK72 output transformer quality ?
  127. Van Scoyoc SRPP Amp - GvT
  128. Newbie/Guitar Amp BOOK recommendation
  129. Hammond PT and KT88 Design costs.
  130. direct coupling
  131. NFB question
  132. ebooks/online literature...
  133. First time tube jitters...
  134. Audio Note Kageki vs. EAR 859 vs. Audio Innovations: The First
  135. Where is the best place to add tubes in this system?
  136. Anyone seen one?
  137. newbie and i mean new
  138. Differential amp, Long tail, Split load - what difference in sonics?
  139. IC geometry
  140. Fully silver hard wired
  141. Possible damage of a 5AS4 full-wave rect...
  142. direct coupling
  143. Good 6L6 schematic needed
  144. I could lose some heat - suggestions?
  145. Svetlana Svetlana EL509-II: Please disregard all my statements about this tube!
  146. help using Tube Tester
  147. @Tanberg owners. help needed..
  148. Electro Harmonix KT90 after 200hrs use
  149. Need suggestions on tube regulator.
  150. EAR 859 questions
  151. First build from scratch.
  152. Tanberg design..
  153. How to use Russian tube 6H6
  154. Are Svet EL509s really EL509s?
  155. Resistors and Capacitors
  156. simple design power amp.. wanted.
  157. SJS SE108Mk2 Amplifier layout.
  158. Free Auctions?
  159. measuring wattage?
  160. Seeking advise on my EL34 amplifier
  161. exchange
  162. CCS in tail of differential phase splitter
  163. Quicksilver 6550A's?
  164. Is this mod worth the effort?
  165. Current sourced heaters
  166. Manual for Tube Technology - Unisis Signature
  167. Valve amp with Dynaudio?
  168. Why can 8W sound as loud as 100W?
  169. Progress of my 813 SE
  170. NOS Tubes
  171. Would it be possible? OTL/OCL KT88?
  172. KT88EH matched quad auction, Fake?!
  173. Interstage attenuation transformer?
  174. HV ON noise
  175. Opinions on Walton Audio 300B Design
  176. Joplin Amp
  177. voltage regulators
  178. CCS for PP Class A output stage?
  179. distortion measurement
  180. Has anybody built the Matthew Reidsma Experimental 45?
  181. Citation II Assembly Manual
  182. what tube preamp DIY kit to match B&W P-5 speakers
  183. heavy duty valve amps.... for PA use....?
  184. Audio Innovation 800 mk2 ? advice?
  185. Tube amps.......AGAIN
  186. driver 6a3
  187. Morgan Jones H/P Amp problems PLEASE HELP
  188. Wad 6550
  189. Ferguson Type: OX170 & Ferguson OP6M Info Needed...
  190. Ebay Stuff - electrolytics for tubies
  191. Pioneer output transformers from the 60's
  192. The future of the Valve.
  193. Trying to understand negative feedback
  194. schematics
  195. Overvolting e-lyts
  196. Bottlehead Paramours done my way
  197. next project: rebuild using fisher 500c trannies
  198. Consonance ELLA
  199. Just a quick Q
  200. Has anyone tried a 6S4A as a 300B driver tube?
  201. Tube Preamp PSU Question
  202. 6N1P for buffer instead of 6DJ8, 6922
  203. quick question about a sovtek 6922
  204. 50.000 $ for a 30W amplifier .
  205. Opinion upon amp life expectancy at 5 hours/day? (theres a catch)
  206. Online Resoucre for Old Tubes?
  207. Comparisons
  208. Conrad Johnson PV10 mod
  209. ETM connected EL/PL509 in T8 OTL-OCL amplifier - how?
  210. good replacement for ECC82
  211. Velleman K4040
  212. $5 SE amp... but is it fried?!
  213. Build with 300B or something else???
  214. Another question
  215. Anybody know these two tubes? DET-9 & Ba
  216. Decent Valve Amp Kit?
  217. distorted hum
  218. Which KT88??
  219. Not connecting grids/anode can hurt tube?
  220. Question for SE Transformer Gurus
  221. Decoupling Paper In Oil capacitor question for KT88 design.
  222. Isabelle Phono Stage
  223. input/driver tube
  224. Best Sounding 6550
  225. toroidal trannies alignment
  226. OTL OCL or Non
  227. How can I use UTC A22 at OPT in pre-amp?
  228. SE Output Transformers
  229. Sq-5
  230. Specs And Curves
  231. Golden Dragon Tube
  232. 2A3 Output Transformer
  233. Powre Transformer for 2A3
  234. Newbie - Is this a good amp?
  235. Reference for DIY AudioCraft in Hong Kong
  236. tubes avalibility
  237. OTL Output Cap Question
  238. Newbie question : Plate CCS
  239. Black Art Single Ended Output Transformers
  240. quick transformer question
  241. CCS for p-p cathode bias ?
  242. Tube output stage for DAC
  243. Reinhöfer Transformers (Germany).
  244. power transformer help !!!
  245. UXCV11 Triode Tube
  246. HVHP shuntreg PCB's available?
  247. Harmon Kardon Ballad Stereo Amplifier
  248. 811A tube internal resistance ?
  249. 8417
  250. Running tubes at lower voltages

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