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  1. Need help
  2. Art Audio Kit on Common Ground Magazine
  3. Advice for retubing VTL Ichiban`s
  4. fisher 800c intermitant hum
  5. calling Yves....
  6. X10 Pre
  7. NEW KT66 - 6AU6 single ended
  8. mechanical hum
  9. Big valve preamp
  10. Question about biasing heater above cathode in a direct coupled circuit.
  11. center tapped choke inverter
  12. Which One Of These Tube Amps Should I Buy?
  13. Tube Info
  14. Circuit/Equipment Designer
  15. help needed with noise in phono preamp
  16. Pentode driver and IT?
  17. Plate Caps for 832A
  18. 300b advice
  19. Designs on your noob, err, tube
  20. 7788 Triode Curves
  21. EL81/6CJ6 operating point
  22. Separate cathode resistors in push pull output
  23. C3m linestage
  24. Anyone know this 13E1 design...
  25. LTP w/ positive only supply
  26. 6V6 line preamp
  27. The 6P43P russian tube is a EL84 equivalent ??
  28. Ixys IXCP10M45s IC
  29. Help with hybrid mosfet valve amp
  30. Substitute for 6gw8 in Heathkit aa-32
  31. U-Follower: Output from Cathode or Plate?
  32. Getting rid of oscillations in the preamp
  33. has anyone used the 4-125A in SE amp ?
  34. line preamp using 6SN7 instead of 12AU7
  35. 3-pong conversion for Acoustic amplifier
  36. 6v6pp design
  37. CCS Plate Load
  38. All tube voltage doubler
  39. best value/performance ECC83 on market
  40. Help needed for my preamp
  41. 6H6p cascode differential driving 2A3 PP
  42. Best phono / line preamp
  43. Point to Point
  44. gain curve questions
  45. Questions concerning Aikido Line amp
  46. Partial cathode bypass to effect a treble boost.
  47. SE bass
  48. choke orientation
  49. Musical Fidelity X-PRE schematic
  50. Circuitmaker Spice question
  51. Trouble with a paraphase PI
  52. 27 pre PS question..
  53. 6AV5 g2 driver
  54. Calculate PSU output impedance?
  55. Output stage biasing, with the driver stage
  56. tube pedal plate voltages?
  57. grounding and 12AV6 diodes
  58. 6as7 Pse
  59. Looking for datasheets
  60. Ping Albert from Canada
  61. Old Tektronix booklet
  62. fisher 800c phase inverter adjustment 2
  63. Quick Transformer Question
  64. Power supply for Heathkit
  65. low-power output tube quality
  66. Conn Caprice organ
  67. Conservation of tubes
  68. Brimar EM87
  69. Tube sockets without the ceramic carrier.
  70. SET with tube-based CCS???
  71. fisher 800c modifications
  72. Bottlehead meet.
  73. Tie cathode to heater??
  74. anyone seen it tried like this?
  75. What do people think of the SETH 2A3 PP?
  76. Very high plate voltage EL34 amp
  77. How About Bridging SE
  78. Fisher 800c Has Odd Cathode Reading
  79. What part of DIY do you LOVE?
  80. Priboi tweakers ?
  81. 5751 and 12ax7
  82. LM317 + ceramic cap Q
  83. Derive Triode Curves from Pentode Curves?
  84. 7701 distortion device?
  85. Looking for the perfect giftshop
  86. 300b
  87. Choked ripple killer for SE?
  88. Dynaco Kits
  89. Positive bias for tube CF?
  90. need help
  91. Xindak attenuation for use with Leak Stereo 20, help please
  92. Series heaters = small problem?
  93. Recommend an EL84 tube for HIFI
  94. Help - need some info on this valve amp, please
  95. H. Olson's amps
  96. 12AT7 and the Simple EL84
  97. New K-12g only one channel working
  98. Kofi Annan in: "Kofi Makes a 300b DRD... and You Get to Help!"
  99. Rauland Borg 6L6 amp Need Info
  100. Hum Noise!
  101. Tube regulator for solidstate devices
  102. 6gu7 a sub for 6cg7/6fq7?
  103. obsession sd-600 300b mono block
  104. how do you know you need matched pair?
  105. Nobu Shishido's 805 SET interstage
  106. KT88SE, turning OPT
  107. New to tubes.
  108. OB with.......well, TL Audio's iTUBE :)
  109. Matched tubes required?
  110. GU-50 output trafo
  111. Are Hammond power transformers good enough ?
  112. Transformers.
  113. Quicky - magic eye between preamp and power stage
  114. HT to rectifier
  115. 6AV5 spice model
  116. Audio Research LS2 from 110V to 220V
  117. 6V6 PP power xfrmr
  118. I think I've damaged my amp
  119. Which brands apart wyetech uses Grounded grid?
  120. Parallel vs. series filament supply - or another filament idea
  121. 6146W Power Amplifier. Please help!
  122. grommes 511a mono tube amp/reciever
  123. First phono needs QC
  124. Meixing 3008ab problems
  125. protecting a VR tube
  126. what's the purpose of pins 3 and 7 in an 8pin VR tube?
  127. help me i need schematic of Music angel PP el34
  128. How long to pre-heat filaments on 6SN7s?
  129. Amplifier Layout - Help & advice needed
  130. Any good places to shop for diy in beijing?
  131. White CF with 6SN7
  132. Power Amp
  133. is there any sound in a 30A5 / HL94 ?
  134. the hybrid one
  135. 4-1000a se subwoofer amp
  136. ear 834p output resistance
  137. Output transformer push pull
  138. Cheap Lunch?
  139. Source for Alps RK18 pot's..?
  140. Triode strapped tetrode
  141. ok, help me out here......
  142. Homebrew Toroid O/P Tranny
  143. strange noises from ECL86 amp
  144. Retouching knicks and scratches on chassis
  145. MingDa MC-7R noise and gain
  146. start-up sequence of Aikido preamp / SS power amp
  147. Driving a 6B4G with a single 5687/7044/E182CC?
  148. phono stage with different replay equalization?
  149. Lprimary variation in pair old opts
  150. 8417 triode connected tube data
  151. 5763 = El84?
  152. 5687 to 6L6 SE ?
  153. TubeCad Feedforward Shunt Regulator
  154. "12EA6" Pentode !
  155. short-circuit rectifier EZ80 !
  156. Good radio tube:6AQ5/6005
  157. Replaced pulled tubes with a resistor?
  158. Choke input PSU, drawbacks?
  159. Heater PS alternative / Redux
  160. Gold or silver dress-up rings for tube amps.
  161. 50C5 conversion
  162. Sa-5.1 blow fuse
  163. Hum problem of preamp
  164. Chassis ground blows fuse
  165. 7193 (2c22) preamp buzz/hum
  166. Se Opt
  167. Does anhone use those switching power supply for the heaters?
  168. Tube Minidoc, featuring New York Noise
  169. Help Choosing A Sowter Trans For My DAC?
  170. fisher 800c clipping at ultra low volume
  171. "audiodigit" tubalizer & tubepre original schematic
  172. F704
  173. tube socket PCB library or dimensions
  174. motorboating
  175. 6AN8 Triode connection + EL 84 PP
  176. Please help amend 6AS7PP circuit
  177. El84 Pp
  178. 6V6 Ultralinear
  179. Dear Moderators
  180. 845 se
  181. Bell 2122-B integrated amp - tube suggestions
  182. Wirewound pot for Rk
  183. KT88/90 F2011 Schematic
  184. United Electric 967
  185. Scott 222c mods...?
  186. Switching supply for 300B filaments
  187. ECF80/6BL8
  188. 24v tube buffer & line stage schematic
  189. Vintage gear hunting
  190. Seperate PSU Transformers? Filament Supplys?
  191. 828 is better
  192. Hum on a choke loaded stage
  193. SE Transformer question
  194. Design question - How to make amp porn visible?
  195. Leak Stereo 20 - Johan's Square Wave Theory
  196. K-12G First Time Build
  197. Vishay vt52-55 resistors in a tube amp
  198. EL84 Push-Pull ccs bias
  199. Eight 807's in Push Pull?
  200. Working with Current O/P DAC Chips
  201. Unison research Preludio schematic
  202. Rewinding Power transformer
  203. Information needed on RCA SPECIAL RED TUBES
  204. Score?
  205. Herron phono
  206. tube preamp + SS power amp.
  207. Puzzler
  208. HI-Fi 6p13p
  209. Resistor values
  210. To chassies SE amp,PSU question
  211. Grounding & board Layout questions
  212. Look for a beefy driver tube.
  213. ECC81
  214. 5687 v.s. 6922 preamp/xover
  215. amorphous iron core good or not
  216. Pre-Amp
  217. submini tube preamp is a success
  218. Roll off frequency.
  219. Materials Technology for Electron Tubes by Walter H. Kohl
  220. Grundig TK 46 manual
  221. How to determine a tube is shorted?
  222. Power supply problem
  223. SS power trans for tube experiments
  224. how to set output current on G Pimm's CCS circuit?
  225. Tube testing questions
  226. Push Pull Output Transformer wiring problem
  227. shunt regulator using VR tubes (with ccs like g pimm) and circuit load
  228. Stepped attenuators vs. Carbon pots
  229. hum/buzz with pot all the way up
  230. VacuTrace ... In Chicago?
  231. Lifesaver question on earthing
  232. Affordable, but good attenuators?
  233. Gu50 Set ?
  234. mounting an EL34 upside-down
  235. Direct coupled PP 2a3 amp - maths needed!!
  236. My 1st scratch build complete......
  237. Very Basic EL84 or EL34 DIY Amp
  238. Curcio Daniel Preamp Mods?
  239. Tube designs: 45 driving 45/2a3/300b?
  240. Adding secondary of output transformer into cathodes of output stage ? Eico ST-70
  241. Marantz 8 B : Output Transformer
  242. has anyone used a fan on their project?
  243. Audio Research SP12 heater arrangement
  244. tv damper diodes
  245. volume pot quite close to a tube - is this okay?
  246. UTC s42 special series
  247. 6H30P preamp schematics
  248. Digital potentiometer corrupt tube amps
  249. Alternative filament supply for 01A line stage
  250. Lamination Size

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