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  1. value of a cap between driver tube and output tubes
  2. do matched pair (or maybe a quad) output tubes "aged" at the same rate?
  3. Mini EL84 Amp Done
  4. Overcoming Miller
  5. Heathkit Schematic model AA-50 needed
  6. Help me choose please
  7. Mono Class A SE Schematics
  8. Irish DIY Meet.
  9. Sizing PP OPT
  10. Do SE transfomers get hot?
  11. Aikido Questions
  12. LTP with interstage trafo
  13. 6BQ5 Push-Pull amplifier
  14. Amplifier input
  15. C#@$ quality 6L6EH's
  16. Mains toroids appear to be great for audio
  17. High bias point.
  18. ebay amp
  19. GU 50 output modification
  20. 6C41Cs Class-A PP
  21. My First Big Amp
  22. sv572-10
  23. Stupid PAS-2 Pot Questions
  24. Old electronics articles
  25. UL Feedback
  26. who know fd23 and fd422 tubes?
  27. Laptop amplifier
  28. Thoughts Of Modifying My First Tube Amp.
  29. Quick question for Eli Duttman (or others!)
  30. Blackened GZ32 glass envelopes
  31. Are these vintage vacuum tubes suitable.....
  32. Tube XP8109-02?!
  33. peak current 300B heater with start up
  34. Microphonic phono preamplifier
  35. Pentode Plate Load
  36. what monoblocks to build?
  37. All tube direct box
  38. max b+ for 6V6
  39. What speakers to go with tubes ??
  40. Bluenote Koala Tube CD Player
  41. OPTs and power for bi-amping
  42. Old Diodes
  43. Father, I abused my Leak S/20
  44. 6688/E180F line stage?
  45. Variable feedback to enhance damping factor at low frequency
  46. Need assistance with picking the right Edcor audio transformer
  47. Critique my first design
  48. Biamping, phase of output?
  49. Ground star
  50. op-points for 27 pre...?
  51. Opinions/Experience of Toroidal valve amps
  52. hum, no way to get rid of it
  53. How to adjust my circuit for frequency response?
  54. Input Tubes?
  55. 6BG6 = 6L6GC with top cap - cheap!
  56. Maida Regulators Redux
  57. ground of DC bias supply
  58. does anyone the website for yaqin/mr. liung/music angel amps?
  59. plate load ccs ala gary p question
  60. Books for newbe
  61. 6AS7 OTL
  62. n00b phono preamp troubleshooting..
  63. TubelabSE - Anyone built?
  64. any example of SE designs using GM70?
  65. Shunt regulator question
  66. Any RH807 builders?
  67. Recycle an Eico HFT-90 for a preamp
  68. EL84 PP output transformer for 6L6 PP class A
  69. toroid psu, weird results...
  70. Squeaky Noise in ARC Dual 75
  71. EL84 mod questions
  72. Measuring DC at preamp output
  73. Is Northern Electric the NEW W.E.?
  74. Burnt Woodside STA35 valve amp... Help!
  75. My tube preamplifier project
  76. Ponderings on hybrid 300B
  77. Maida Regulator Parts
  78. anyone familiar with the 211/vt4c circuit from Fi Primer?
  79. Calculating operating points of two DC stages
  80. Advice for retubing VTL Ichiban`s
  81. Need help
  82. Art Audio Kit on Common Ground Magazine
  83. Advice for retubing VTL Ichiban`s
  84. fisher 800c intermitant hum
  85. calling Yves....
  86. X10 Pre
  87. NEW KT66 - 6AU6 single ended
  88. mechanical hum
  89. Big valve preamp
  90. Question about biasing heater above cathode in a direct coupled circuit.
  91. center tapped choke inverter
  92. Which One Of These Tube Amps Should I Buy?
  93. Tube Info
  94. Circuit/Equipment Designer
  95. help needed with noise in phono preamp
  96. Pentode driver and IT?
  97. Plate Caps for 832A
  98. 300b advice
  99. Designs on your noob, err, tube
  100. 7788 Triode Curves
  101. EL81/6CJ6 operating point
  102. Separate cathode resistors in push pull output
  103. C3m linestage
  104. Anyone know this 13E1 design...
  105. LTP w/ positive only supply
  106. 6V6 line preamp
  107. The 6P43P russian tube is a EL84 equivalent ??
  108. Ixys IXCP10M45s IC
  109. Help with hybrid mosfet valve amp
  110. Substitute for 6gw8 in Heathkit aa-32
  111. U-Follower: Output from Cathode or Plate?
  112. Getting rid of oscillations in the preamp
  113. has anyone used the 4-125A in SE amp ?
  114. line preamp using 6SN7 instead of 12AU7
  115. 3-pong conversion for Acoustic amplifier
  116. 6v6pp design
  117. CCS Plate Load
  118. All tube voltage doubler
  119. best value/performance ECC83 on market
  120. Help needed for my preamp
  121. 6H6p cascode differential driving 2A3 PP
  122. Best phono / line preamp
  123. Point to Point
  124. gain curve questions
  125. Questions concerning Aikido Line amp
  126. Partial cathode bypass to effect a treble boost.
  127. SE bass
  128. choke orientation
  129. Musical Fidelity X-PRE schematic
  130. Circuitmaker Spice question
  131. Trouble with a paraphase PI
  132. 27 pre PS question..
  133. 6AV5 g2 driver
  134. Calculate PSU output impedance?
  135. Output stage biasing, with the driver stage
  136. tube pedal plate voltages?
  137. grounding and 12AV6 diodes
  138. 6as7 Pse
  139. Looking for datasheets
  140. Ping Albert from Canada
  141. Old Tektronix booklet
  142. fisher 800c phase inverter adjustment 2
  143. Quick Transformer Question
  144. Power supply for Heathkit
  145. low-power output tube quality
  146. Conn Caprice organ
  147. Conservation of tubes
  148. Brimar EM87
  149. Tube sockets without the ceramic carrier.
  150. SET with tube-based CCS???
  151. fisher 800c modifications
  152. Bottlehead meet.
  153. Tie cathode to heater??
  154. anyone seen it tried like this?
  155. What do people think of the SETH 2A3 PP?
  156. Very high plate voltage EL34 amp
  157. How About Bridging SE
  158. Fisher 800c Has Odd Cathode Reading
  159. What part of DIY do you LOVE?
  160. Priboi tweakers ?
  161. 5751 and 12ax7
  162. LM317 + ceramic cap Q
  163. Derive Triode Curves from Pentode Curves?
  164. 7701 distortion device?
  165. Looking for the perfect giftshop
  166. 300b
  167. Choked ripple killer for SE?
  168. Dynaco Kits
  169. Positive bias for tube CF?
  170. need help
  171. Xindak attenuation for use with Leak Stereo 20, help please
  172. Series heaters = small problem?
  173. Recommend an EL84 tube for HIFI
  174. Help - need some info on this valve amp, please
  175. H. Olson's amps
  176. 12AT7 and the Simple EL84
  177. New K-12g only one channel working
  178. Kofi Annan in: "Kofi Makes a 300b DRD... and You Get to Help!"
  179. Rauland Borg 6L6 amp Need Info
  180. Hum Noise!
  181. Tube regulator for solidstate devices
  182. 6gu7 a sub for 6cg7/6fq7?
  183. obsession sd-600 300b mono block
  184. how do you know you need matched pair?
  185. Nobu Shishido's 805 SET interstage
  186. KT88SE, turning OPT
  187. New to tubes.
  188. OB with.......well, TL Audio's iTUBE :)
  189. Matched tubes required?
  190. GU-50 output trafo
  191. Are Hammond power transformers good enough ?
  192. Transformers.
  193. Quicky - magic eye between preamp and power stage
  194. HT to rectifier
  195. 6AV5 spice model
  196. Audio Research LS2 from 110V to 220V
  197. 6V6 PP power xfrmr
  198. I think I've damaged my amp
  199. Which brands apart wyetech uses Grounded grid?
  200. Parallel vs. series filament supply - or another filament idea
  201. 6146W Power Amplifier. Please help!
  202. grommes 511a mono tube amp/reciever
  203. First phono needs QC
  204. Meixing 3008ab problems
  205. protecting a VR tube
  206. what's the purpose of pins 3 and 7 in an 8pin VR tube?
  207. help me i need schematic of Music angel PP el34
  208. How long to pre-heat filaments on 6SN7s?
  209. Amplifier Layout - Help & advice needed
  210. Any good places to shop for diy in beijing?
  211. White CF with 6SN7
  212. Power Amp
  213. is there any sound in a 30A5 / HL94 ?
  214. the hybrid one
  215. 4-1000a se subwoofer amp
  216. ear 834p output resistance
  217. Output transformer push pull
  218. Cheap Lunch?
  219. Source for Alps RK18 pot's..?
  220. Triode strapped tetrode
  221. ok, help me out here......
  222. Homebrew Toroid O/P Tranny
  223. strange noises from ECL86 amp
  224. Retouching knicks and scratches on chassis
  225. MingDa MC-7R noise and gain
  226. start-up sequence of Aikido preamp / SS power amp
  227. Driving a 6B4G with a single 5687/7044/E182CC?
  228. phono stage with different replay equalization?
  229. Lprimary variation in pair old opts
  230. 8417 triode connected tube data
  231. 5763 = El84?
  232. 5687 to 6L6 SE ?
  233. TubeCad Feedforward Shunt Regulator
  234. "12EA6" Pentode !
  235. short-circuit rectifier EZ80 !
  236. Good radio tube:6AQ5/6005
  237. Replaced pulled tubes with a resistor?
  238. Choke input PSU, drawbacks?
  239. Heater PS alternative / Redux
  240. Gold or silver dress-up rings for tube amps.
  241. 50C5 conversion
  242. Sa-5.1 blow fuse
  243. Hum problem of preamp
  244. Chassis ground blows fuse
  245. 7193 (2c22) preamp buzz/hum
  246. Se Opt
  247. Does anhone use those switching power supply for the heaters?
  248. Tube Minidoc, featuring New York Noise
  249. Help Choosing A Sowter Trans For My DAC?
  250. fisher 800c clipping at ultra low volume

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