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  1. Microphonic phono preamplifier
  2. Pentode Plate Load
  3. what monoblocks to build?
  4. All tube direct box
  5. max b+ for 6V6
  6. What speakers to go with tubes ??
  7. Bluenote Koala Tube CD Player
  8. OPTs and power for bi-amping
  9. Quick And Dirty ~75W Guitar Amp
  10. Old Diodes
  11. Father, I abused my Leak S/20
  12. 6688/E180F line stage?
  13. Variable feedback to enhance damping factor at low frequency
  14. Need assistance with picking the right Edcor audio transformer
  15. Critique my first design
  16. Biamping, phase of output?
  17. Ground star
  18. op-points for 27 pre...?
  19. Opinions/Experience of Toroidal valve amps
  20. hum, no way to get rid of it
  21. How to adjust my circuit for frequency response?
  22. Input Tubes?
  23. 6BG6 = 6L6GC with top cap - cheap!
  24. Maida Regulators Redux
  25. ground of DC bias supply
  26. does anyone the website for yaqin/mr. liung/music angel amps?
  27. plate load ccs ala gary p question
  28. Books for newbe
  29. 6AS7 OTL
  30. n00b phono preamp troubleshooting..
  31. TubelabSE - Anyone built?
  32. any example of SE designs using GM70?
  33. Shunt regulator question
  34. Any RH807 builders?
  35. Replacing multi-section caps with multiple caps?
  36. Recycle an Eico HFT-90 for a preamp
  37. EL84 PP output transformer for 6L6 PP class A
  38. Jensen PIO capacitor burn in
  39. toroid psu, weird results...
  40. Squeaky Noise in ARC Dual 75
  41. EL84 mod questions
  42. Measuring DC at preamp output
  43. Is Northern Electric the NEW W.E.?
  44. Burnt Woodside STA35 valve amp... Help!
  45. My tube preamplifier project
  46. Ponderings on hybrid 300B
  47. Maida Regulator Parts
  48. anyone familiar with the 211/vt4c circuit from Fi Primer?
  49. Calculating operating points of two DC stages
  50. Advice for retubing VTL Ichiban`s
  51. Need help
  52. Art Audio Kit on Common Ground Magazine
  53. Advice for retubing VTL Ichiban`s
  54. fisher 800c intermitant hum
  55. calling Yves....
  56. X10 Pre
  57. NEW KT66 - 6AU6 single ended
  58. mechanical hum
  59. Big valve preamp
  60. Question about biasing heater above cathode in a direct coupled circuit.
  61. center tapped choke inverter
  62. Guitar tube pre DIY suggestions..?
  63. Which One Of These Tube Amps Should I Buy?
  64. Tube Info
  65. Circuit/Equipment Designer
  66. help needed with noise in phono preamp
  67. Pentode driver and IT?
  68. Plate Caps for 832A
  69. 300b advice
  70. Designs on your noob, err, tube
  71. 7788 Triode Curves
  72. EL81/6CJ6 operating point
  73. Separate cathode resistors in push pull output
  74. C3m linestage
  75. Anyone know this 13E1 design...
  76. LTP w/ positive only supply
  77. 6V6 line preamp
  78. The 6P43P russian tube is a EL84 equivalent ??
  79. Ixys IXCP10M45s IC
  80. Help with hybrid mosfet valve amp
  81. Substitute for 6gw8 in Heathkit aa-32
  82. U-Follower: Output from Cathode or Plate?
  83. Getting rid of oscillations in the preamp
  84. has anyone used the 4-125A in SE amp ?
  85. line preamp using 6SN7 instead of 12AU7
  86. 3-pong conversion for Acoustic amplifier
  87. 6v6pp design
  88. CCS Plate Load
  89. All tube voltage doubler
  90. best value/performance ECC83 on market
  91. Help needed for my preamp
  92. 6H6p cascode differential driving 2A3 PP
  93. Best phono / line preamp
  94. Point to Point
  95. gain curve questions
  96. Questions concerning Aikido Line amp
  97. Partial cathode bypass to effect a treble boost.
  98. SE bass
  99. choke orientation
  100. Musical Fidelity X-PRE schematic
  101. Circuitmaker Spice question
  102. Trouble with a paraphase PI
  103. 27 pre PS question..
  104. 6AV5 g2 driver
  105. Calculate PSU output impedance?
  106. Output stage biasing, with the driver stage
  107. tube pedal plate voltages?
  108. grounding and 12AV6 diodes
  109. 6as7 Pse
  110. Looking for datasheets
  111. Ping Albert from Canada
  112. Old Tektronix booklet
  113. fisher 800c phase inverter adjustment 2
  114. Quick Transformer Question
  115. Power supply for Heathkit
  116. low-power output tube quality
  117. Conn Caprice organ
  118. Conservation of tubes
  119. Brimar EM87
  120. Tube sockets without the ceramic carrier.
  121. SET with tube-based CCS???
  122. fisher 800c modifications
  123. Bottlehead meet.
  124. Tie cathode to heater??
  125. anyone seen it tried like this?
  126. What do people think of the SETH 2A3 PP?
  127. Very high plate voltage EL34 amp
  128. How About Bridging SE
  129. Fisher 800c Has Odd Cathode Reading
  130. What part of DIY do you LOVE?
  131. Priboi tweakers ?
  132. 5751 and 12ax7
  133. LM317 + ceramic cap Q
  134. Derive Triode Curves from Pentode Curves?
  135. 7701 distortion device?
  136. Looking for the perfect giftshop
  137. 300b
  138. Choked ripple killer for SE?
  139. Dynaco Kits
  140. Positive bias for tube CF?
  141. need help
  142. Xindak attenuation for use with Leak Stereo 20, help please
  143. Series heaters = small problem?
  144. Recommend an EL84 tube for HIFI
  145. Help - need some info on this valve amp, please
  146. H. Olson's amps
  147. 12AT7 and the Simple EL84
  148. New K-12g only one channel working
  149. Kofi Annan in: "Kofi Makes a 300b DRD... and You Get to Help!"
  150. Rauland Borg 6L6 amp Need Info
  151. Hum Noise!
  152. Tube regulator for solidstate devices
  153. 6gu7 a sub for 6cg7/6fq7?
  154. obsession sd-600 300b mono block
  155. how do you know you need matched pair?
  156. Nobu Shishido's 805 SET interstage
  157. KT88SE, turning OPT
  158. New to tubes.
  159. OB with.......well, TL Audio's iTUBE :)
  160. Matched tubes required?
  161. GU-50 output trafo
  162. Are Hammond power transformers good enough ?
  163. Transformers.
  164. Quicky - magic eye between preamp and power stage
  165. HT to rectifier
  166. 6AV5 spice model
  167. Audio Research LS2 from 110V to 220V
  168. 6V6 PP power xfrmr
  169. I think I've damaged my amp
  170. Which brands apart wyetech uses Grounded grid?
  171. Parallel vs. series filament supply - or another filament idea
  172. 6146W Power Amplifier. Please help!
  173. grommes 511a mono tube amp/reciever
  174. First phono needs QC
  175. Meixing 3008ab problems
  176. protecting a VR tube
  177. what's the purpose of pins 3 and 7 in an 8pin VR tube?
  178. help me i need schematic of Music angel PP el34
  179. How long to pre-heat filaments on 6SN7s?
  180. Amplifier Layout - Help & advice needed
  181. Any good places to shop for diy in beijing?
  182. White CF with 6SN7
  183. Cheapo Guitar Amp
  184. Power Amp
  185. is there any sound in a 30A5 / HL94 ?
  186. the hybrid one
  187. 4-1000a se subwoofer amp
  188. ear 834p output resistance
  189. Output transformer push pull
  190. Cheap Lunch?
  191. Source for Alps RK18 pot's..?
  192. Triode strapped tetrode
  193. ok, help me out here......
  194. Homebrew Toroid O/P Tranny
  195. GIBSON GA-79RVT Stereo Cab plans or dims
  196. strange noises from ECL86 amp
  197. Retouching knicks and scratches on chassis
  198. MingDa MC-7R noise and gain
  199. start-up sequence of Aikido preamp / SS power amp
  200. Driving a 6B4G with a single 5687/7044/E182CC?
  201. phono stage with different replay equalization?
  202. Lprimary variation in pair old opts
  203. 8417 triode connected tube data
  204. 5763 = El84?
  205. 5687 to 6L6 SE ?
  206. TubeCad Feedforward Shunt Regulator
  207. "12EA6" Pentode !
  208. Marshall EL34-100/100
  209. short-circuit rectifier EZ80 !
  210. Good radio tube:6AQ5/6005
  211. Replaced pulled tubes with a resistor?
  212. Choke input PSU, drawbacks?
  213. Heater PS alternative / Redux
  214. Gold or silver dress-up rings for tube amps.
  215. 50C5 conversion
  216. Sa-5.1 blow fuse
  217. Hum problem of preamp
  218. Chassis ground blows fuse
  219. 7193 (2c22) preamp buzz/hum
  220. Se Opt
  221. Does anhone use those switching power supply for the heaters?
  222. Tube Minidoc, featuring New York Noise
  223. Help Choosing A Sowter Trans For My DAC?
  224. fisher 800c clipping at ultra low volume
  225. "audiodigit" tubalizer & tubepre original schematic
  226. Dht Guitar Amps
  227. rating of series caps
  228. F704
  229. tube socket PCB library or dimensions
  230. motorboating
  231. 6AN8 Triode connection + EL 84 PP
  232. Please help amend 6AS7PP circuit
  233. El84 Pp
  234. 6V6 Ultralinear
  235. Dear Moderators
  236. 845 se
  237. Bell 2122-B integrated amp - tube suggestions
  238. Wirewound pot for Rk
  239. KT88/90 F2011 Schematic
  240. United Electric 967
  241. Scott 222c mods...?
  242. Switching supply for 300B filaments
  243. ECF80/6BL8
  244. 24v tube buffer & line stage schematic
  245. Vintage gear hunting
  246. Seperate PSU Transformers? Filament Supplys?
  247. 828 is better
  248. Hum on a choke loaded stage
  249. SE Transformer question
  250. Design question - How to make amp porn visible?

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