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  1. power supply (cap input)
  2. is it safe to connect these secondaries in series?
  3. Peter Millett's Uniamp with KT88
  4. Mystery transformer
  5. Can I phase split like this?
  6. How to model psud2 using tube regulator?
  7. Choke-loaded 6C33C stage
  8. EL84 as both driver and output stage.
  9. Silvertone (Sears) stereo amp
  10. Chasing hum in a new tube amp
  11. Zenith K731 AM/FM radio audio random cracking sound in FM mode
  12. 6bx7gt Se Amp
  13. Beard P100 Bias Lights
  14. Metasonix TS-21 modulator
  15. help with diyparadiso schematics
  16. electrostatic shield - nice to have or recommended or doesn't matter?
  17. Simple method for 240V from 240V line
  18. Audiophile bibliophilia nervosa
  19. Help with amp layout
  20. Why triode Mk3 is louder than stock Mk3
  21. Seduction or Cornet for phono???
  22. Please review my 6AQ5 Amp
  23. 832A PP Amp LTP
  24. Checklist to observe before applying the mains
  25. C3g driving 2a3: Triode or pentode?
  26. psud2 question and Fi Primer's 211 circuit
  27. Jolida JD-301A & Jadis DPL
  28. Headphones with a Tube Amp
  29. 6S3B-V Wire-Ended Single-Triode tube
  30. Anode stoppers
  31. Weird Quad II mains transformer help
  32. Mullard 5-20 parts list
  33. has anyone DIYed a Citation 2?
  34. Bogen/plexi conversion question
  35. Matched pair - different brands
  36. ERIC Mod 3460P Restore
  37. PV12 Preamplifier
  38. Grandma's old Capitol Console
  39. Music Angel
  40. What is the version of 45
  41. Aikido for guitar?
  42. Heathkit potted power transformer question
  43. Thermionic Cooling?
  44. What have the finest sound, the PX4 or the 45 ?
  45. value of a cap between driver tube and output tubes
  46. do matched pair (or maybe a quad) output tubes "aged" at the same rate?
  47. Mini EL84 Amp Done
  48. Overcoming Miller
  49. Heathkit Schematic model AA-50 needed
  50. Help me choose please
  51. Mono Class A SE Schematics
  52. Irish DIY Meet.
  53. Sizing PP OPT
  54. 6BQ5/EL90 guitar amp schematics wanted
  55. Do SE transfomers get hot?
  56. Aikido Questions
  57. LTP with interstage trafo
  58. 6BQ5 Push-Pull amplifier
  59. Amplifier input
  60. C#@$ quality 6L6EH's
  61. Mains toroids appear to be great for audio
  62. High bias point.
  63. ebay amp
  64. GU 50 output modification
  65. 6C41Cs Class-A PP
  66. My First Big Amp
  67. sv572-10
  68. Stupid PAS-2 Pot Questions
  69. Old electronics articles
  70. UL Feedback
  71. who know fd23 and fd422 tubes?
  72. Laptop amplifier
  73. Thoughts Of Modifying My First Tube Amp.
  74. Quick question for Eli Duttman (or others!)
  75. Blackened GZ32 glass envelopes
  76. Are these vintage vacuum tubes suitable.....
  77. Tube XP8109-02?!
  78. peak current 300B heater with start up
  79. Microphonic phono preamplifier
  80. Pentode Plate Load
  81. what monoblocks to build?
  82. All tube direct box
  83. max b+ for 6V6
  84. What speakers to go with tubes ??
  85. Bluenote Koala Tube CD Player
  86. OPTs and power for bi-amping
  87. Quick And Dirty ~75W Guitar Amp
  88. Old Diodes
  89. Father, I abused my Leak S/20
  90. 6688/E180F line stage?
  91. Variable feedback to enhance damping factor at low frequency
  92. Need assistance with picking the right Edcor audio transformer
  93. Critique my first design
  94. Biamping, phase of output?
  95. Ground star
  96. op-points for 27 pre...?
  97. Opinions/Experience of Toroidal valve amps
  98. hum, no way to get rid of it
  99. How to adjust my circuit for frequency response?
  100. Input Tubes?
  101. 6BG6 = 6L6GC with top cap - cheap!
  102. Maida Regulators Redux
  103. ground of DC bias supply
  104. does anyone the website for yaqin/mr. liung/music angel amps?
  105. plate load ccs ala gary p question
  106. Books for newbe
  107. 6AS7 OTL
  108. n00b phono preamp troubleshooting..
  109. TubelabSE - Anyone built?
  110. any example of SE designs using GM70?
  111. Shunt regulator question
  112. Any RH807 builders?
  113. Replacing multi-section caps with multiple caps?
  114. Recycle an Eico HFT-90 for a preamp
  115. EL84 PP output transformer for 6L6 PP class A
  116. Jensen PIO capacitor burn in
  117. toroid psu, weird results...
  118. Squeaky Noise in ARC Dual 75
  119. EL84 mod questions
  120. Measuring DC at preamp output
  121. Is Northern Electric the NEW W.E.?
  122. Burnt Woodside STA35 valve amp... Help!
  123. My tube preamplifier project
  124. Ponderings on hybrid 300B
  125. Maida Regulator Parts
  126. anyone familiar with the 211/vt4c circuit from Fi Primer?
  127. Calculating operating points of two DC stages
  128. Advice for retubing VTL Ichiban`s
  129. Need help
  130. Art Audio Kit on Common Ground Magazine
  131. Advice for retubing VTL Ichiban`s
  132. fisher 800c intermitant hum
  133. calling Yves....
  134. X10 Pre
  135. NEW KT66 - 6AU6 single ended
  136. mechanical hum
  137. Big valve preamp
  138. Question about biasing heater above cathode in a direct coupled circuit.
  139. center tapped choke inverter
  140. Guitar tube pre DIY suggestions..?
  141. Which One Of These Tube Amps Should I Buy?
  142. Tube Info
  143. Circuit/Equipment Designer
  144. help needed with noise in phono preamp
  145. Pentode driver and IT?
  146. Plate Caps for 832A
  147. 300b advice
  148. Designs on your noob, err, tube
  149. 7788 Triode Curves
  150. EL81/6CJ6 operating point
  151. Separate cathode resistors in push pull output
  152. C3m linestage
  153. Anyone know this 13E1 design...
  154. LTP w/ positive only supply
  155. 6V6 line preamp
  156. The 6P43P russian tube is a EL84 equivalent ??
  157. Ixys IXCP10M45s IC
  158. Help with hybrid mosfet valve amp
  159. Substitute for 6gw8 in Heathkit aa-32
  160. U-Follower: Output from Cathode or Plate?
  161. Getting rid of oscillations in the preamp
  162. has anyone used the 4-125A in SE amp ?
  163. line preamp using 6SN7 instead of 12AU7
  164. 3-pong conversion for Acoustic amplifier
  165. 6v6pp design
  166. CCS Plate Load
  167. All tube voltage doubler
  168. best value/performance ECC83 on market
  169. Help needed for my preamp
  170. 6H6p cascode differential driving 2A3 PP
  171. Best phono / line preamp
  172. Point to Point
  173. gain curve questions
  174. Questions concerning Aikido Line amp
  175. Partial cathode bypass to effect a treble boost.
  176. SE bass
  177. choke orientation
  178. Musical Fidelity X-PRE schematic
  179. Circuitmaker Spice question
  180. Trouble with a paraphase PI
  181. 27 pre PS question..
  182. 6AV5 g2 driver
  183. Calculate PSU output impedance?
  184. Output stage biasing, with the driver stage
  185. tube pedal plate voltages?
  186. grounding and 12AV6 diodes
  187. 6as7 Pse
  188. Looking for datasheets
  189. Ping Albert from Canada
  190. Old Tektronix booklet
  191. fisher 800c phase inverter adjustment 2
  192. Quick Transformer Question
  193. Power supply for Heathkit
  194. low-power output tube quality
  195. Conn Caprice organ
  196. Conservation of tubes
  197. Brimar EM87
  198. Tube sockets without the ceramic carrier.
  199. SET with tube-based CCS???
  200. fisher 800c modifications
  201. Bottlehead meet.
  202. Tie cathode to heater??
  203. anyone seen it tried like this?
  204. What do people think of the SETH 2A3 PP?
  205. Very high plate voltage EL34 amp
  206. How About Bridging SE
  207. Fisher 800c Has Odd Cathode Reading
  208. What part of DIY do you LOVE?
  209. Priboi tweakers ?
  210. 5751 and 12ax7
  211. LM317 + ceramic cap Q
  212. Derive Triode Curves from Pentode Curves?
  213. 7701 distortion device?
  214. Looking for the perfect giftshop
  215. 300b
  216. Choked ripple killer for SE?
  217. Dynaco Kits
  218. Positive bias for tube CF?
  219. need help
  220. Xindak attenuation for use with Leak Stereo 20, help please
  221. Series heaters = small problem?
  222. Recommend an EL84 tube for HIFI
  223. Help - need some info on this valve amp, please
  224. H. Olson's amps
  225. 12AT7 and the Simple EL84
  226. New K-12g only one channel working
  227. Kofi Annan in: "Kofi Makes a 300b DRD... and You Get to Help!"
  228. Rauland Borg 6L6 amp Need Info
  229. Hum Noise!
  230. Tube regulator for solidstate devices
  231. 6gu7 a sub for 6cg7/6fq7?
  232. obsession sd-600 300b mono block
  233. how do you know you need matched pair?
  234. Nobu Shishido's 805 SET interstage
  235. KT88SE, turning OPT
  236. New to tubes.
  237. OB with.......well, TL Audio's iTUBE :)
  238. Matched tubes required?
  239. GU-50 output trafo
  240. Are Hammond power transformers good enough ?
  241. Transformers.
  242. Quicky - magic eye between preamp and power stage
  243. HT to rectifier
  244. 6AV5 spice model
  245. Audio Research LS2 from 110V to 220V
  246. 6V6 PP power xfrmr
  247. I think I've damaged my amp
  248. Which brands apart wyetech uses Grounded grid?
  249. Parallel vs. series filament supply - or another filament idea
  250. 6146W Power Amplifier. Please help!

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