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  1. Input attenuation on Leak amp
  2. 101D Sockets
  3. PC86, '88 RF Amplifiers
  4. Jolida SJ-302A tube swap
  5. Inductance for tweeter OPT
  6. Help me.......What is the 6SN7 ???????
  7. high DCR secondary (power transformer)
  8. Transformer power formula Help???
  9. 2A3 OTL 800 Ohm Speaker
  10. Trying to find specs on transformer core material
  11. 12AX7 suggestions?
  12. power supply (cap input)
  13. is it safe to connect these secondaries in series?
  14. Peter Millett's Uniamp with KT88
  15. Mystery transformer
  16. Can I phase split like this?
  17. How to model psud2 using tube regulator?
  18. Choke-loaded 6C33C stage
  19. EL84 as both driver and output stage.
  20. Silvertone (Sears) stereo amp
  21. Chasing hum in a new tube amp
  22. Zenith K731 AM/FM radio audio random cracking sound in FM mode
  23. 6bx7gt Se Amp
  24. Beard P100 Bias Lights
  25. Metasonix TS-21 modulator
  26. help with diyparadiso schematics
  27. electrostatic shield - nice to have or recommended or doesn't matter?
  28. Simple method for 240V from 240V line
  29. Audiophile bibliophilia nervosa
  30. Help with amp layout
  31. Why triode Mk3 is louder than stock Mk3
  32. Seduction or Cornet for phono???
  33. Please review my 6AQ5 Amp
  34. 832A PP Amp LTP
  35. Checklist to observe before applying the mains
  36. C3g driving 2a3: Triode or pentode?
  37. psud2 question and Fi Primer's 211 circuit
  38. Jolida JD-301A & Jadis DPL
  39. Headphones with a Tube Amp
  40. 6S3B-V Wire-Ended Single-Triode tube
  41. Anode stoppers
  42. Weird Quad II mains transformer help
  43. Mullard 5-20 parts list
  44. has anyone DIYed a Citation 2?
  45. Bogen/plexi conversion question
  46. Matched pair - different brands
  47. ERIC Mod 3460P Restore
  48. PV12 Preamplifier
  49. Grandma's old Capitol Console
  50. Music Angel
  51. What is the version of 45
  52. Heathkit potted power transformer question
  53. Thermionic Cooling?
  54. What have the finest sound, the PX4 or the 45 ?
  55. value of a cap between driver tube and output tubes
  56. do matched pair (or maybe a quad) output tubes "aged" at the same rate?
  57. Mini EL84 Amp Done
  58. Overcoming Miller
  59. Heathkit Schematic model AA-50 needed
  60. Help me choose please
  61. Mono Class A SE Schematics
  62. Irish DIY Meet.
  63. Sizing PP OPT
  64. Do SE transfomers get hot?
  65. Aikido Questions
  66. LTP with interstage trafo
  67. 6BQ5 Push-Pull amplifier
  68. Amplifier input
  69. C#@$ quality 6L6EH's
  70. Mains toroids appear to be great for audio
  71. High bias point.
  72. ebay amp
  73. GU 50 output modification
  74. 6C41Cs Class-A PP
  75. My First Big Amp
  76. sv572-10
  77. Stupid PAS-2 Pot Questions
  78. Old electronics articles
  79. UL Feedback
  80. who know fd23 and fd422 tubes?
  81. Laptop amplifier
  82. Thoughts Of Modifying My First Tube Amp.
  83. Quick question for Eli Duttman (or others!)
  84. Blackened GZ32 glass envelopes
  85. Are these vintage vacuum tubes suitable.....
  86. Tube XP8109-02?!
  87. peak current 300B heater with start up
  88. Microphonic phono preamplifier
  89. Pentode Plate Load
  90. what monoblocks to build?
  91. All tube direct box
  92. max b+ for 6V6
  93. What speakers to go with tubes ??
  94. Bluenote Koala Tube CD Player
  95. OPTs and power for bi-amping
  96. Old Diodes
  97. Father, I abused my Leak S/20
  98. 6688/E180F line stage?
  99. Variable feedback to enhance damping factor at low frequency
  100. Need assistance with picking the right Edcor audio transformer
  101. Critique my first design
  102. Biamping, phase of output?
  103. Ground star
  104. op-points for 27 pre...?
  105. Opinions/Experience of Toroidal valve amps
  106. hum, no way to get rid of it
  107. How to adjust my circuit for frequency response?
  108. Input Tubes?
  109. 6BG6 = 6L6GC with top cap - cheap!
  110. Maida Regulators Redux
  111. ground of DC bias supply
  112. does anyone the website for yaqin/mr. liung/music angel amps?
  113. plate load ccs ala gary p question
  114. Books for newbe
  115. 6AS7 OTL
  116. n00b phono preamp troubleshooting..
  117. any example of SE designs using GM70?
  118. Shunt regulator question
  119. Any RH807 builders?
  120. Recycle an Eico HFT-90 for a preamp
  121. EL84 PP output transformer for 6L6 PP class A
  122. toroid psu, weird results...
  123. Squeaky Noise in ARC Dual 75
  124. EL84 mod questions
  125. Measuring DC at preamp output
  126. Is Northern Electric the NEW W.E.?
  127. Burnt Woodside STA35 valve amp... Help!
  128. My tube preamplifier project
  129. Ponderings on hybrid 300B
  130. Maida Regulator Parts
  131. anyone familiar with the 211/vt4c circuit from Fi Primer?
  132. Calculating operating points of two DC stages
  133. Advice for retubing VTL Ichiban`s
  134. Need help
  135. Art Audio Kit on Common Ground Magazine
  136. Advice for retubing VTL Ichiban`s
  137. fisher 800c intermitant hum
  138. calling Yves....
  139. X10 Pre
  140. NEW KT66 - 6AU6 single ended
  141. mechanical hum
  142. Big valve preamp
  143. Question about biasing heater above cathode in a direct coupled circuit.
  144. center tapped choke inverter
  145. Which One Of These Tube Amps Should I Buy?
  146. Tube Info
  147. Circuit/Equipment Designer
  148. help needed with noise in phono preamp
  149. Pentode driver and IT?
  150. Plate Caps for 832A
  151. 300b advice
  152. Designs on your noob, err, tube
  153. 7788 Triode Curves
  154. EL81/6CJ6 operating point
  155. Separate cathode resistors in push pull output
  156. C3m linestage
  157. Anyone know this 13E1 design...
  158. LTP w/ positive only supply
  159. 6V6 line preamp
  160. The 6P43P russian tube is a EL84 equivalent ??
  161. Ixys IXCP10M45s IC
  162. Help with hybrid mosfet valve amp
  163. Substitute for 6gw8 in Heathkit aa-32
  164. U-Follower: Output from Cathode or Plate?
  165. Getting rid of oscillations in the preamp
  166. has anyone used the 4-125A in SE amp ?
  167. line preamp using 6SN7 instead of 12AU7
  168. 3-pong conversion for Acoustic amplifier
  169. 6v6pp design
  170. CCS Plate Load
  171. All tube voltage doubler
  172. best value/performance ECC83 on market
  173. Help needed for my preamp
  174. 6H6p cascode differential driving 2A3 PP
  175. Best phono / line preamp
  176. Point to Point
  177. gain curve questions
  178. Questions concerning Aikido Line amp
  179. Partial cathode bypass to effect a treble boost.
  180. SE bass
  181. choke orientation
  182. Musical Fidelity X-PRE schematic
  183. Circuitmaker Spice question
  184. Trouble with a paraphase PI
  185. 27 pre PS question..
  186. 6AV5 g2 driver
  187. Calculate PSU output impedance?
  188. Output stage biasing, with the driver stage
  189. tube pedal plate voltages?
  190. grounding and 12AV6 diodes
  191. 6as7 Pse
  192. Looking for datasheets
  193. Ping Albert from Canada
  194. Old Tektronix booklet
  195. fisher 800c phase inverter adjustment 2
  196. Quick Transformer Question
  197. Power supply for Heathkit
  198. low-power output tube quality
  199. Conn Caprice organ
  200. Conservation of tubes
  201. Brimar EM87
  202. Tube sockets without the ceramic carrier.
  203. SET with tube-based CCS???
  204. fisher 800c modifications
  205. Bottlehead meet.
  206. Tie cathode to heater??
  207. anyone seen it tried like this?
  208. What do people think of the SETH 2A3 PP?
  209. Very high plate voltage EL34 amp
  210. How About Bridging SE
  211. Fisher 800c Has Odd Cathode Reading
  212. What part of DIY do you LOVE?
  213. Priboi tweakers ?
  214. 5751 and 12ax7
  215. LM317 + ceramic cap Q
  216. Derive Triode Curves from Pentode Curves?
  217. 7701 distortion device?
  218. Looking for the perfect giftshop
  219. 300b
  220. Choked ripple killer for SE?
  221. Dynaco Kits
  222. Positive bias for tube CF?
  223. need help
  224. Xindak attenuation for use with Leak Stereo 20, help please
  225. Series heaters = small problem?
  226. Recommend an EL84 tube for HIFI
  227. Help - need some info on this valve amp, please
  228. H. Olson's amps
  229. 12AT7 and the Simple EL84
  230. New K-12g only one channel working
  231. Kofi Annan in: "Kofi Makes a 300b DRD... and You Get to Help!"
  232. Rauland Borg 6L6 amp Need Info
  233. Hum Noise!
  234. Tube regulator for solidstate devices
  235. 6gu7 a sub for 6cg7/6fq7?
  236. obsession sd-600 300b mono block
  237. how do you know you need matched pair?
  238. Nobu Shishido's 805 SET interstage
  239. KT88SE, turning OPT
  240. New to tubes.
  241. OB with.......well, TL Audio's iTUBE :)
  242. Matched tubes required?
  243. GU-50 output trafo
  244. Are Hammond power transformers good enough ?
  245. Transformers.
  246. Quicky - magic eye between preamp and power stage
  247. HT to rectifier
  248. 6AV5 spice model
  249. Audio Research LS2 from 110V to 220V
  250. 6V6 PP power xfrmr

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