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  1. Old Diodes
  2. Father, I abused my Leak S/20
  3. 6688/E180F line stage?
  4. Variable feedback to enhance damping factor at low frequency
  5. Need assistance with picking the right Edcor audio transformer
  6. Critique my first design
  7. Biamping, phase of output?
  8. Ground star
  9. op-points for 27 pre...?
  10. Opinions/Experience of Toroidal valve amps
  11. hum, no way to get rid of it
  12. How to adjust my circuit for frequency response?
  13. Input Tubes?
  14. 6BG6 = 6L6GC with top cap - cheap!
  15. Maida Regulators Redux
  16. ground of DC bias supply
  17. does anyone the website for yaqin/mr. liung/music angel amps?
  18. plate load ccs ala gary p question
  19. Books for newbe
  20. 6AS7 OTL
  21. n00b phono preamp troubleshooting..
  22. TubelabSE - Anyone built?
  23. any example of SE designs using GM70?
  24. Shunt regulator question
  25. Any RH807 builders?
  26. Replacing multi-section caps with multiple caps?
  27. Recycle an Eico HFT-90 for a preamp
  28. EL84 PP output transformer for 6L6 PP class A
  29. Jensen PIO capacitor burn in
  30. toroid psu, weird results...
  31. Squeaky Noise in ARC Dual 75
  32. EL84 mod questions
  33. Measuring DC at preamp output
  34. Is Northern Electric the NEW W.E.?
  35. Burnt Woodside STA35 valve amp... Help!
  36. My tube preamplifier project
  37. Ponderings on hybrid 300B
  38. Maida Regulator Parts
  39. anyone familiar with the 211/vt4c circuit from Fi Primer?
  40. Calculating operating points of two DC stages
  41. Advice for retubing VTL Ichiban`s
  42. Need help
  43. Art Audio Kit on Common Ground Magazine
  44. Advice for retubing VTL Ichiban`s
  45. fisher 800c intermitant hum
  46. calling Yves....
  47. X10 Pre
  48. NEW KT66 - 6AU6 single ended
  49. mechanical hum
  50. Big valve preamp
  51. Question about biasing heater above cathode in a direct coupled circuit.
  52. center tapped choke inverter
  53. Guitar tube pre DIY suggestions..?
  54. Which One Of These Tube Amps Should I Buy?
  55. Tube Info
  56. Circuit/Equipment Designer
  57. help needed with noise in phono preamp
  58. Pentode driver and IT?
  59. Plate Caps for 832A
  60. 300b advice
  61. Designs on your noob, err, tube
  62. 7788 Triode Curves
  63. EL81/6CJ6 operating point
  64. Separate cathode resistors in push pull output
  65. C3m linestage
  66. Anyone know this 13E1 design...
  67. LTP w/ positive only supply
  68. 6V6 line preamp
  69. The 6P43P russian tube is a EL84 equivalent ??
  70. Ixys IXCP10M45s IC
  71. Help with hybrid mosfet valve amp
  72. Substitute for 6gw8 in Heathkit aa-32
  73. U-Follower: Output from Cathode or Plate?
  74. Getting rid of oscillations in the preamp
  75. has anyone used the 4-125A in SE amp ?
  76. line preamp using 6SN7 instead of 12AU7
  77. 3-pong conversion for Acoustic amplifier
  78. 6v6pp design
  79. CCS Plate Load
  80. All tube voltage doubler
  81. best value/performance ECC83 on market
  82. Help needed for my preamp
  83. 6H6p cascode differential driving 2A3 PP
  84. Best phono / line preamp
  85. Point to Point
  86. gain curve questions
  87. Questions concerning Aikido Line amp
  88. Partial cathode bypass to effect a treble boost.
  89. SE bass
  90. choke orientation
  91. Musical Fidelity X-PRE schematic
  92. Circuitmaker Spice question
  93. Trouble with a paraphase PI
  94. 27 pre PS question..
  95. 6AV5 g2 driver
  96. Calculate PSU output impedance?
  97. Output stage biasing, with the driver stage
  98. tube pedal plate voltages?
  99. grounding and 12AV6 diodes
  100. 6as7 Pse
  101. Looking for datasheets
  102. Ping Albert from Canada
  103. Old Tektronix booklet
  104. fisher 800c phase inverter adjustment 2
  105. Quick Transformer Question
  106. Power supply for Heathkit
  107. low-power output tube quality
  108. Conn Caprice organ
  109. Conservation of tubes
  110. Brimar EM87
  111. Tube sockets without the ceramic carrier.
  112. SET with tube-based CCS???
  113. fisher 800c modifications
  114. Bottlehead meet.
  115. Tie cathode to heater??
  116. anyone seen it tried like this?
  117. What do people think of the SETH 2A3 PP?
  118. Very high plate voltage EL34 amp
  119. How About Bridging SE
  120. Fisher 800c Has Odd Cathode Reading
  121. What part of DIY do you LOVE?
  122. Priboi tweakers ?
  123. 5751 and 12ax7
  124. LM317 + ceramic cap Q
  125. Derive Triode Curves from Pentode Curves?
  126. 7701 distortion device?
  127. Looking for the perfect giftshop
  128. 300b
  129. Choked ripple killer for SE?
  130. Dynaco Kits
  131. Positive bias for tube CF?
  132. need help
  133. Xindak attenuation for use with Leak Stereo 20, help please
  134. Series heaters = small problem?
  135. Recommend an EL84 tube for HIFI
  136. Help - need some info on this valve amp, please
  137. H. Olson's amps
  138. 12AT7 and the Simple EL84
  139. New K-12g only one channel working
  140. Kofi Annan in: "Kofi Makes a 300b DRD... and You Get to Help!"
  141. Rauland Borg 6L6 amp Need Info
  142. Hum Noise!
  143. Tube regulator for solidstate devices
  144. 6gu7 a sub for 6cg7/6fq7?
  145. obsession sd-600 300b mono block
  146. how do you know you need matched pair?
  147. Nobu Shishido's 805 SET interstage
  148. KT88SE, turning OPT
  149. New to tubes.
  150. OB with.......well, TL Audio's iTUBE :)
  151. Matched tubes required?
  152. GU-50 output trafo
  153. Are Hammond power transformers good enough ?
  154. Transformers.
  155. Quicky - magic eye between preamp and power stage
  156. HT to rectifier
  157. 6AV5 spice model
  158. Audio Research LS2 from 110V to 220V
  159. 6V6 PP power xfrmr
  160. I think I've damaged my amp
  161. Which brands apart wyetech uses Grounded grid?
  162. Parallel vs. series filament supply - or another filament idea
  163. 6146W Power Amplifier. Please help!
  164. grommes 511a mono tube amp/reciever
  165. First phono needs QC
  166. Meixing 3008ab problems
  167. protecting a VR tube
  168. what's the purpose of pins 3 and 7 in an 8pin VR tube?
  169. help me i need schematic of Music angel PP el34
  170. How long to pre-heat filaments on 6SN7s?
  171. Amplifier Layout - Help & advice needed
  172. Any good places to shop for diy in beijing?
  173. White CF with 6SN7
  174. Cheapo Guitar Amp
  175. Power Amp
  176. is there any sound in a 30A5 / HL94 ?
  177. the hybrid one
  178. 4-1000a se subwoofer amp
  179. ear 834p output resistance
  180. Output transformer push pull
  181. Cheap Lunch?
  182. Source for Alps RK18 pot's..?
  183. Triode strapped tetrode
  184. ok, help me out here......
  185. Homebrew Toroid O/P Tranny
  186. GIBSON GA-79RVT Stereo Cab plans or dims
  187. strange noises from ECL86 amp
  188. Retouching knicks and scratches on chassis
  189. MingDa MC-7R noise and gain
  190. start-up sequence of Aikido preamp / SS power amp
  191. Driving a 6B4G with a single 5687/7044/E182CC?
  192. phono stage with different replay equalization?
  193. Lprimary variation in pair old opts
  194. 8417 triode connected tube data
  195. 5763 = El84?
  196. 5687 to 6L6 SE ?
  197. TubeCad Feedforward Shunt Regulator
  198. "12EA6" Pentode !
  199. Marshall EL34-100/100
  200. short-circuit rectifier EZ80 !
  201. Good radio tube:6AQ5/6005
  202. Replaced pulled tubes with a resistor?
  203. Choke input PSU, drawbacks?
  204. Heater PS alternative / Redux
  205. Gold or silver dress-up rings for tube amps.
  206. 50C5 conversion
  207. Sa-5.1 blow fuse
  208. Hum problem of preamp
  209. Chassis ground blows fuse
  210. 7193 (2c22) preamp buzz/hum
  211. Se Opt
  212. Does anhone use those switching power supply for the heaters?
  213. Tube Minidoc, featuring New York Noise
  214. Help Choosing A Sowter Trans For My DAC?
  215. fisher 800c clipping at ultra low volume
  216. "audiodigit" tubalizer & tubepre original schematic
  217. Dht Guitar Amps
  218. rating of series caps
  219. F704
  220. tube socket PCB library or dimensions
  221. motorboating
  222. 6AN8 Triode connection + EL 84 PP
  223. Please help amend 6AS7PP circuit
  224. El84 Pp
  225. 6V6 Ultralinear
  226. Dear Moderators
  227. 845 se
  228. Bell 2122-B integrated amp - tube suggestions
  229. Wirewound pot for Rk
  230. KT88/90 F2011 Schematic
  231. United Electric 967
  232. Scott 222c mods...?
  233. Switching supply for 300B filaments
  234. ECF80/6BL8
  235. 24v tube buffer & line stage schematic
  236. Vintage gear hunting
  237. Seperate PSU Transformers? Filament Supplys?
  238. 828 is better
  239. Hum on a choke loaded stage
  240. SE Transformer question
  241. Design question - How to make amp porn visible?
  242. Leak Stereo 20 - Johan's Square Wave Theory
  243. K-12G First Time Build
  244. Vishay vt52-55 resistors in a tube amp
  245. EL84 Push-Pull ccs bias
  246. Eight 807's in Push Pull?
  247. Working with Current O/P DAC Chips
  248. Unison research Preludio schematic
  249. Rewinding Power transformer
  250. Information needed on RCA SPECIAL RED TUBES

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