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  1. Amplifier input
  2. C#@$ quality 6L6EH's
  3. Mains toroids appear to be great for audio
  4. High bias point.
  5. ebay amp
  6. GU 50 output modification
  7. 6C41Cs Class-A PP
  8. My First Big Amp
  9. sv572-10
  10. Stupid PAS-2 Pot Questions
  11. Old electronics articles
  12. UL Feedback
  13. who know fd23 and fd422 tubes?
  14. Laptop amplifier
  15. Thoughts Of Modifying My First Tube Amp.
  16. Quick question for Eli Duttman (or others!)
  17. Blackened GZ32 glass envelopes
  18. Are these vintage vacuum tubes suitable.....
  19. Tube XP8109-02?!
  20. peak current 300B heater with start up
  21. Microphonic phono preamplifier
  22. Pentode Plate Load
  23. what monoblocks to build?
  24. All tube direct box
  25. max b+ for 6V6
  26. What speakers to go with tubes ??
  27. Bluenote Koala Tube CD Player
  28. OPTs and power for bi-amping
  29. Quick And Dirty ~75W Guitar Amp
  30. Old Diodes
  31. Father, I abused my Leak S/20
  32. 6688/E180F line stage?
  33. Variable feedback to enhance damping factor at low frequency
  34. Need assistance with picking the right Edcor audio transformer
  35. Critique my first design
  36. Biamping, phase of output?
  37. Ground star
  38. op-points for 27 pre...?
  39. Opinions/Experience of Toroidal valve amps
  40. hum, no way to get rid of it
  41. How to adjust my circuit for frequency response?
  42. Input Tubes?
  43. 6BG6 = 6L6GC with top cap - cheap!
  44. Maida Regulators Redux
  45. ground of DC bias supply
  46. does anyone the website for yaqin/mr. liung/music angel amps?
  47. plate load ccs ala gary p question
  48. Books for newbe
  49. 6AS7 OTL
  50. n00b phono preamp troubleshooting..
  51. TubelabSE - Anyone built?
  52. any example of SE designs using GM70?
  53. Shunt regulator question
  54. Any RH807 builders?
  55. Replacing multi-section caps with multiple caps?
  56. Recycle an Eico HFT-90 for a preamp
  57. EL84 PP output transformer for 6L6 PP class A
  58. Jensen PIO capacitor burn in
  59. toroid psu, weird results...
  60. Squeaky Noise in ARC Dual 75
  61. EL84 mod questions
  62. Measuring DC at preamp output
  63. Is Northern Electric the NEW W.E.?
  64. Burnt Woodside STA35 valve amp... Help!
  65. My tube preamplifier project
  66. Ponderings on hybrid 300B
  67. Maida Regulator Parts
  68. anyone familiar with the 211/vt4c circuit from Fi Primer?
  69. Calculating operating points of two DC stages
  70. Advice for retubing VTL Ichiban`s
  71. Need help
  72. Art Audio Kit on Common Ground Magazine
  73. Advice for retubing VTL Ichiban`s
  74. fisher 800c intermitant hum
  75. calling Yves....
  76. X10 Pre
  77. NEW KT66 - 6AU6 single ended
  78. mechanical hum
  79. Big valve preamp
  80. Question about biasing heater above cathode in a direct coupled circuit.
  81. center tapped choke inverter
  82. Guitar tube pre DIY suggestions..?
  83. Which One Of These Tube Amps Should I Buy?
  84. Tube Info
  85. Circuit/Equipment Designer
  86. help needed with noise in phono preamp
  87. Pentode driver and IT?
  88. Plate Caps for 832A
  89. 300b advice
  90. Designs on your noob, err, tube
  91. 7788 Triode Curves
  92. EL81/6CJ6 operating point
  93. Separate cathode resistors in push pull output
  94. C3m linestage
  95. Anyone know this 13E1 design...
  96. LTP w/ positive only supply
  97. 6V6 line preamp
  98. The 6P43P russian tube is a EL84 equivalent ??
  99. Ixys IXCP10M45s IC
  100. Help with hybrid mosfet valve amp
  101. Substitute for 6gw8 in Heathkit aa-32
  102. U-Follower: Output from Cathode or Plate?
  103. Getting rid of oscillations in the preamp
  104. has anyone used the 4-125A in SE amp ?
  105. line preamp using 6SN7 instead of 12AU7
  106. 3-pong conversion for Acoustic amplifier
  107. 6v6pp design
  108. CCS Plate Load
  109. All tube voltage doubler
  110. best value/performance ECC83 on market
  111. Help needed for my preamp
  112. 6H6p cascode differential driving 2A3 PP
  113. Best phono / line preamp
  114. Point to Point
  115. gain curve questions
  116. Questions concerning Aikido Line amp
  117. Partial cathode bypass to effect a treble boost.
  118. SE bass
  119. choke orientation
  120. Musical Fidelity X-PRE schematic
  121. Circuitmaker Spice question
  122. Trouble with a paraphase PI
  123. 27 pre PS question..
  124. 6AV5 g2 driver
  125. Calculate PSU output impedance?
  126. Output stage biasing, with the driver stage
  127. tube pedal plate voltages?
  128. grounding and 12AV6 diodes
  129. 6as7 Pse
  130. Looking for datasheets
  131. Ping Albert from Canada
  132. Old Tektronix booklet
  133. fisher 800c phase inverter adjustment 2
  134. Quick Transformer Question
  135. Power supply for Heathkit
  136. low-power output tube quality
  137. Conn Caprice organ
  138. Conservation of tubes
  139. Brimar EM87
  140. Tube sockets without the ceramic carrier.
  141. SET with tube-based CCS???
  142. fisher 800c modifications
  143. Bottlehead meet.
  144. Tie cathode to heater??
  145. anyone seen it tried like this?
  146. What do people think of the SETH 2A3 PP?
  147. Very high plate voltage EL34 amp
  148. How About Bridging SE
  149. Fisher 800c Has Odd Cathode Reading
  150. What part of DIY do you LOVE?
  151. Priboi tweakers ?
  152. 5751 and 12ax7
  153. LM317 + ceramic cap Q
  154. Derive Triode Curves from Pentode Curves?
  155. 7701 distortion device?
  156. Looking for the perfect giftshop
  157. 300b
  158. Choked ripple killer for SE?
  159. Dynaco Kits
  160. Positive bias for tube CF?
  161. need help
  162. Xindak attenuation for use with Leak Stereo 20, help please
  163. Series heaters = small problem?
  164. Recommend an EL84 tube for HIFI
  165. Help - need some info on this valve amp, please
  166. H. Olson's amps
  167. 12AT7 and the Simple EL84
  168. New K-12g only one channel working
  169. Kofi Annan in: "Kofi Makes a 300b DRD... and You Get to Help!"
  170. Rauland Borg 6L6 amp Need Info
  171. Hum Noise!
  172. Tube regulator for solidstate devices
  173. 6gu7 a sub for 6cg7/6fq7?
  174. obsession sd-600 300b mono block
  175. how do you know you need matched pair?
  176. Nobu Shishido's 805 SET interstage
  177. KT88SE, turning OPT
  178. New to tubes.
  179. OB with.......well, TL Audio's iTUBE :)
  180. Matched tubes required?
  181. GU-50 output trafo
  182. Are Hammond power transformers good enough ?
  183. Transformers.
  184. Quicky - magic eye between preamp and power stage
  185. HT to rectifier
  186. 6AV5 spice model
  187. Audio Research LS2 from 110V to 220V
  188. 6V6 PP power xfrmr
  189. I think I've damaged my amp
  190. Which brands apart wyetech uses Grounded grid?
  191. Parallel vs. series filament supply - or another filament idea
  192. 6146W Power Amplifier. Please help!
  193. grommes 511a mono tube amp/reciever
  194. First phono needs QC
  195. Meixing 3008ab problems
  196. protecting a VR tube
  197. what's the purpose of pins 3 and 7 in an 8pin VR tube?
  198. help me i need schematic of Music angel PP el34
  199. How long to pre-heat filaments on 6SN7s?
  200. Amplifier Layout - Help & advice needed
  201. Any good places to shop for diy in beijing?
  202. White CF with 6SN7
  203. Cheapo Guitar Amp
  204. Power Amp
  205. is there any sound in a 30A5 / HL94 ?
  206. the hybrid one
  207. 4-1000a se subwoofer amp
  208. ear 834p output resistance
  209. Output transformer push pull
  210. Cheap Lunch?
  211. Source for Alps RK18 pot's..?
  212. Triode strapped tetrode
  213. ok, help me out here......
  214. Homebrew Toroid O/P Tranny
  215. GIBSON GA-79RVT Stereo Cab plans or dims
  216. strange noises from ECL86 amp
  217. Retouching knicks and scratches on chassis
  218. MingDa MC-7R noise and gain
  219. start-up sequence of Aikido preamp / SS power amp
  220. Driving a 6B4G with a single 5687/7044/E182CC?
  221. phono stage with different replay equalization?
  222. Lprimary variation in pair old opts
  223. 8417 triode connected tube data
  224. 5763 = El84?
  225. 5687 to 6L6 SE ?
  226. TubeCad Feedforward Shunt Regulator
  227. "12EA6" Pentode !
  228. Marshall EL34-100/100
  229. short-circuit rectifier EZ80 !
  230. Good radio tube:6AQ5/6005
  231. Replaced pulled tubes with a resistor?
  232. Choke input PSU, drawbacks?
  233. Heater PS alternative / Redux
  234. Gold or silver dress-up rings for tube amps.
  235. 50C5 conversion
  236. Sa-5.1 blow fuse
  237. Hum problem of preamp
  238. Chassis ground blows fuse
  239. 7193 (2c22) preamp buzz/hum
  240. Se Opt
  241. Does anhone use those switching power supply for the heaters?
  242. Tube Minidoc, featuring New York Noise
  243. Help Choosing A Sowter Trans For My DAC?
  244. fisher 800c clipping at ultra low volume
  245. "audiodigit" tubalizer & tubepre original schematic
  246. Dht Guitar Amps
  247. rating of series caps
  248. F704
  249. tube socket PCB library or dimensions
  250. motorboating

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