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  1. Jolida JD-301A & Jadis DPL
  2. Headphones with a Tube Amp
  3. 6S3B-V Wire-Ended Single-Triode tube
  4. Anode stoppers
  5. Weird Quad II mains transformer help
  6. Mullard 5-20 parts list
  7. has anyone DIYed a Citation 2?
  8. Bogen/plexi conversion question
  9. Matched pair - different brands
  10. ERIC Mod 3460P Restore
  11. PV12 Preamplifier
  12. Grandma's old Capitol Console
  13. Music Angel
  14. What is the version of 45
  15. Heathkit potted power transformer question
  16. Thermionic Cooling?
  17. What have the finest sound, the PX4 or the 45 ?
  18. value of a cap between driver tube and output tubes
  19. do matched pair (or maybe a quad) output tubes "aged" at the same rate?
  20. Mini EL84 Amp Done
  21. Overcoming Miller
  22. Heathkit Schematic model AA-50 needed
  23. Help me choose please
  24. Mono Class A SE Schematics
  25. Irish DIY Meet.
  26. Sizing PP OPT
  27. Do SE transfomers get hot?
  28. Aikido Questions
  29. LTP with interstage trafo
  30. 6BQ5 Push-Pull amplifier
  31. Amplifier input
  32. C#@$ quality 6L6EH's
  33. Mains toroids appear to be great for audio
  34. High bias point.
  35. ebay amp
  36. GU 50 output modification
  37. 6C41Cs Class-A PP
  38. My First Big Amp
  39. sv572-10
  40. Stupid PAS-2 Pot Questions
  41. Old electronics articles
  42. UL Feedback
  43. who know fd23 and fd422 tubes?
  44. Laptop amplifier
  45. Thoughts Of Modifying My First Tube Amp.
  46. Quick question for Eli Duttman (or others!)
  47. Blackened GZ32 glass envelopes
  48. Are these vintage vacuum tubes suitable.....
  49. Tube XP8109-02?!
  50. peak current 300B heater with start up
  51. Microphonic phono preamplifier
  52. Pentode Plate Load
  53. what monoblocks to build?
  54. All tube direct box
  55. max b+ for 6V6
  56. What speakers to go with tubes ??
  57. Bluenote Koala Tube CD Player
  58. OPTs and power for bi-amping
  59. Old Diodes
  60. Father, I abused my Leak S/20
  61. 6688/E180F line stage?
  62. Variable feedback to enhance damping factor at low frequency
  63. Need assistance with picking the right Edcor audio transformer
  64. Critique my first design
  65. Biamping, phase of output?
  66. Ground star
  67. op-points for 27 pre...?
  68. Opinions/Experience of Toroidal valve amps
  69. hum, no way to get rid of it
  70. How to adjust my circuit for frequency response?
  71. Input Tubes?
  72. 6BG6 = 6L6GC with top cap - cheap!
  73. Maida Regulators Redux
  74. ground of DC bias supply
  75. does anyone the website for yaqin/mr. liung/music angel amps?
  76. plate load ccs ala gary p question
  77. Books for newbe
  78. 6AS7 OTL
  79. n00b phono preamp troubleshooting..
  80. any example of SE designs using GM70?
  81. Shunt regulator question
  82. Any RH807 builders?
  83. Recycle an Eico HFT-90 for a preamp
  84. EL84 PP output transformer for 6L6 PP class A
  85. toroid psu, weird results...
  86. Squeaky Noise in ARC Dual 75
  87. EL84 mod questions
  88. Measuring DC at preamp output
  89. Is Northern Electric the NEW W.E.?
  90. Burnt Woodside STA35 valve amp... Help!
  91. My tube preamplifier project
  92. Ponderings on hybrid 300B
  93. Maida Regulator Parts
  94. anyone familiar with the 211/vt4c circuit from Fi Primer?
  95. Calculating operating points of two DC stages
  96. Advice for retubing VTL Ichiban`s
  97. Need help
  98. Art Audio Kit on Common Ground Magazine
  99. Advice for retubing VTL Ichiban`s
  100. fisher 800c intermitant hum
  101. calling Yves....
  102. X10 Pre
  103. NEW KT66 - 6AU6 single ended
  104. mechanical hum
  105. Big valve preamp
  106. Question about biasing heater above cathode in a direct coupled circuit.
  107. center tapped choke inverter
  108. Which One Of These Tube Amps Should I Buy?
  109. Tube Info
  110. Circuit/Equipment Designer
  111. help needed with noise in phono preamp
  112. Pentode driver and IT?
  113. Plate Caps for 832A
  114. 300b advice
  115. Designs on your noob, err, tube
  116. 7788 Triode Curves
  117. EL81/6CJ6 operating point
  118. Separate cathode resistors in push pull output
  119. C3m linestage
  120. Anyone know this 13E1 design...
  121. LTP w/ positive only supply
  122. 6V6 line preamp
  123. The 6P43P russian tube is a EL84 equivalent ??
  124. Ixys IXCP10M45s IC
  125. Help with hybrid mosfet valve amp
  126. Substitute for 6gw8 in Heathkit aa-32
  127. U-Follower: Output from Cathode or Plate?
  128. Getting rid of oscillations in the preamp
  129. has anyone used the 4-125A in SE amp ?
  130. line preamp using 6SN7 instead of 12AU7
  131. 3-pong conversion for Acoustic amplifier
  132. 6v6pp design
  133. CCS Plate Load
  134. All tube voltage doubler
  135. best value/performance ECC83 on market
  136. Help needed for my preamp
  137. 6H6p cascode differential driving 2A3 PP
  138. Best phono / line preamp
  139. Point to Point
  140. gain curve questions
  141. Questions concerning Aikido Line amp
  142. Partial cathode bypass to effect a treble boost.
  143. SE bass
  144. choke orientation
  145. Musical Fidelity X-PRE schematic
  146. Circuitmaker Spice question
  147. Trouble with a paraphase PI
  148. 27 pre PS question..
  149. 6AV5 g2 driver
  150. Calculate PSU output impedance?
  151. Output stage biasing, with the driver stage
  152. tube pedal plate voltages?
  153. grounding and 12AV6 diodes
  154. 6as7 Pse
  155. Looking for datasheets
  156. Ping Albert from Canada
  157. Old Tektronix booklet
  158. fisher 800c phase inverter adjustment 2
  159. Quick Transformer Question
  160. Power supply for Heathkit
  161. low-power output tube quality
  162. Conn Caprice organ
  163. Conservation of tubes
  164. Brimar EM87
  165. Tube sockets without the ceramic carrier.
  166. SET with tube-based CCS???
  167. fisher 800c modifications
  168. Bottlehead meet.
  169. Tie cathode to heater??
  170. anyone seen it tried like this?
  171. What do people think of the SETH 2A3 PP?
  172. Very high plate voltage EL34 amp
  173. How About Bridging SE
  174. Fisher 800c Has Odd Cathode Reading
  175. What part of DIY do you LOVE?
  176. Priboi tweakers ?
  177. 5751 and 12ax7
  178. LM317 + ceramic cap Q
  179. Derive Triode Curves from Pentode Curves?
  180. 7701 distortion device?
  181. Looking for the perfect giftshop
  182. 300b
  183. Choked ripple killer for SE?
  184. Dynaco Kits
  185. Positive bias for tube CF?
  186. need help
  187. Xindak attenuation for use with Leak Stereo 20, help please
  188. Series heaters = small problem?
  189. Recommend an EL84 tube for HIFI
  190. Help - need some info on this valve amp, please
  191. H. Olson's amps
  192. 12AT7 and the Simple EL84
  193. New K-12g only one channel working
  194. Kofi Annan in: "Kofi Makes a 300b DRD... and You Get to Help!"
  195. Rauland Borg 6L6 amp Need Info
  196. Hum Noise!
  197. Tube regulator for solidstate devices
  198. 6gu7 a sub for 6cg7/6fq7?
  199. obsession sd-600 300b mono block
  200. how do you know you need matched pair?
  201. Nobu Shishido's 805 SET interstage
  202. KT88SE, turning OPT
  203. New to tubes.
  204. OB with.......well, TL Audio's iTUBE :)
  205. Matched tubes required?
  206. GU-50 output trafo
  207. Are Hammond power transformers good enough ?
  208. Transformers.
  209. Quicky - magic eye between preamp and power stage
  210. HT to rectifier
  211. 6AV5 spice model
  212. Audio Research LS2 from 110V to 220V
  213. 6V6 PP power xfrmr
  214. I think I've damaged my amp
  215. Which brands apart wyetech uses Grounded grid?
  216. Parallel vs. series filament supply - or another filament idea
  217. 6146W Power Amplifier. Please help!
  218. grommes 511a mono tube amp/reciever
  219. First phono needs QC
  220. Meixing 3008ab problems
  221. protecting a VR tube
  222. what's the purpose of pins 3 and 7 in an 8pin VR tube?
  223. help me i need schematic of Music angel PP el34
  224. How long to pre-heat filaments on 6SN7s?
  225. Amplifier Layout - Help & advice needed
  226. Any good places to shop for diy in beijing?
  227. White CF with 6SN7
  228. Power Amp
  229. is there any sound in a 30A5 / HL94 ?
  230. the hybrid one
  231. 4-1000a se subwoofer amp
  232. ear 834p output resistance
  233. Output transformer push pull
  234. Cheap Lunch?
  235. Source for Alps RK18 pot's..?
  236. Triode strapped tetrode
  237. ok, help me out here......
  238. Homebrew Toroid O/P Tranny
  239. strange noises from ECL86 amp
  240. Retouching knicks and scratches on chassis
  241. MingDa MC-7R noise and gain
  242. start-up sequence of Aikido preamp / SS power amp
  243. Driving a 6B4G with a single 5687/7044/E182CC?
  244. phono stage with different replay equalization?
  245. Lprimary variation in pair old opts
  246. 8417 triode connected tube data
  247. 5763 = El84?
  248. 5687 to 6L6 SE ?
  249. TubeCad Feedforward Shunt Regulator
  250. "12EA6" Pentode !

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