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  1. PC86, '88 RF Amplifiers
  2. Jolida SJ-302A tube swap
  3. Inductance for tweeter OPT
  4. Help me.......What is the 6SN7 ???????
  5. high DCR secondary (power transformer)
  6. Transformer power formula Help???
  7. 2A3 OTL 800 Ohm Speaker
  8. Trying to find specs on transformer core material
  9. 12AX7 suggestions?
  10. power supply (cap input)
  11. is it safe to connect these secondaries in series?
  12. Peter Millett's Uniamp with KT88
  13. Mystery transformer
  14. Can I phase split like this?
  15. How to model psud2 using tube regulator?
  16. Choke-loaded 6C33C stage
  17. EL84 as both driver and output stage.
  18. Silvertone (Sears) stereo amp
  19. Chasing hum in a new tube amp
  20. Zenith K731 AM/FM radio audio random cracking sound in FM mode
  21. 6bx7gt Se Amp
  22. Beard P100 Bias Lights
  23. Metasonix TS-21 modulator
  24. help with diyparadiso schematics
  25. electrostatic shield - nice to have or recommended or doesn't matter?
  26. Simple method for 240V from 240V line
  27. Audiophile bibliophilia nervosa
  28. Help with amp layout
  29. Why triode Mk3 is louder than stock Mk3
  30. Seduction or Cornet for phono???
  31. Please review my 6AQ5 Amp
  32. 832A PP Amp LTP
  33. Checklist to observe before applying the mains
  34. C3g driving 2a3: Triode or pentode?
  35. psud2 question and Fi Primer's 211 circuit
  36. Jolida JD-301A & Jadis DPL
  37. Headphones with a Tube Amp
  38. 6S3B-V Wire-Ended Single-Triode tube
  39. Anode stoppers
  40. Weird Quad II mains transformer help
  41. Mullard 5-20 parts list
  42. has anyone DIYed a Citation 2?
  43. Bogen/plexi conversion question
  44. Matched pair - different brands
  45. ERIC Mod 3460P Restore
  46. PV12 Preamplifier
  47. Grandma's old Capitol Console
  48. Music Angel
  49. What is the version of 45
  50. Aikido for guitar?
  51. Heathkit potted power transformer question
  52. Thermionic Cooling?
  53. What have the finest sound, the PX4 or the 45 ?
  54. value of a cap between driver tube and output tubes
  55. do matched pair (or maybe a quad) output tubes "aged" at the same rate?
  56. Mini EL84 Amp Done
  57. Overcoming Miller
  58. Heathkit Schematic model AA-50 needed
  59. Help me choose please
  60. Mono Class A SE Schematics
  61. Irish DIY Meet.
  62. Sizing PP OPT
  63. 6BQ5/EL90 guitar amp schematics wanted
  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. Quick And Dirty ~75W Guitar Amp
  97. Old Diodes
  98. Father, I abused my Leak S/20
  99. 6688/E180F line stage?
  100. Variable feedback to enhance damping factor at low frequency
  101. Need assistance with picking the right Edcor audio transformer
  102. Critique my first design
  103. Biamping, phase of output?
  104. Ground star
  105. op-points for 27 pre...?
  106. Opinions/Experience of Toroidal valve amps
  107. hum, no way to get rid of it
  108. How to adjust my circuit for frequency response?
  109. Input Tubes?
  110. 6BG6 = 6L6GC with top cap - cheap!
  111. Maida Regulators Redux
  112. ground of DC bias supply
  113. does anyone the website for yaqin/mr. liung/music angel amps?
  114. plate load ccs ala gary p question
  115. Books for newbe
  116. 6AS7 OTL
  117. n00b phono preamp troubleshooting..
  118. TubelabSE - Anyone built?
  119. any example of SE designs using GM70?
  120. Shunt regulator question
  121. Any RH807 builders?
  122. Replacing multi-section caps with multiple caps?
  123. Recycle an Eico HFT-90 for a preamp
  124. EL84 PP output transformer for 6L6 PP class A
  125. Jensen PIO capacitor burn in
  126. toroid psu, weird results...
  127. Squeaky Noise in ARC Dual 75
  128. EL84 mod questions
  129. Measuring DC at preamp output
  130. Is Northern Electric the NEW W.E.?
  131. Burnt Woodside STA35 valve amp... Help!
  132. My tube preamplifier project
  133. Ponderings on hybrid 300B
  134. Maida Regulator Parts
  135. anyone familiar with the 211/vt4c circuit from Fi Primer?
  136. Calculating operating points of two DC stages
  137. Advice for retubing VTL Ichiban`s
  138. Need help
  139. Art Audio Kit on Common Ground Magazine
  140. Advice for retubing VTL Ichiban`s
  141. fisher 800c intermitant hum
  142. calling Yves....
  143. X10 Pre
  144. NEW KT66 - 6AU6 single ended
  145. mechanical hum
  146. Big valve preamp
  147. Question about biasing heater above cathode in a direct coupled circuit.
  148. center tapped choke inverter
  149. Guitar tube pre DIY suggestions..?
  150. Which One Of These Tube Amps Should I Buy?
  151. Tube Info
  152. Circuit/Equipment Designer
  153. help needed with noise in phono preamp
  154. Pentode driver and IT?
  155. Plate Caps for 832A
  156. 300b advice
  157. Designs on your noob, err, tube
  158. 7788 Triode Curves
  159. EL81/6CJ6 operating point
  160. Separate cathode resistors in push pull output
  161. C3m linestage
  162. Anyone know this 13E1 design...
  163. LTP w/ positive only supply
  164. 6V6 line preamp
  165. The 6P43P russian tube is a EL84 equivalent ??
  166. Ixys IXCP10M45s IC
  167. Help with hybrid mosfet valve amp
  168. Substitute for 6gw8 in Heathkit aa-32
  169. U-Follower: Output from Cathode or Plate?
  170. Getting rid of oscillations in the preamp
  171. has anyone used the 4-125A in SE amp ?
  172. line preamp using 6SN7 instead of 12AU7
  173. 3-pong conversion for Acoustic amplifier
  174. 6v6pp design
  175. CCS Plate Load
  176. All tube voltage doubler
  177. best value/performance ECC83 on market
  178. Help needed for my preamp
  179. 6H6p cascode differential driving 2A3 PP
  180. Best phono / line preamp
  181. Point to Point
  182. gain curve questions
  183. Questions concerning Aikido Line amp
  184. Partial cathode bypass to effect a treble boost.
  185. SE bass
  186. choke orientation
  187. Musical Fidelity X-PRE schematic
  188. Circuitmaker Spice question
  189. Trouble with a paraphase PI
  190. 27 pre PS question..
  191. 6AV5 g2 driver
  192. Calculate PSU output impedance?
  193. Output stage biasing, with the driver stage
  194. tube pedal plate voltages?
  195. grounding and 12AV6 diodes
  196. 6as7 Pse
  197. Looking for datasheets
  198. Ping Albert from Canada
  199. Old Tektronix booklet
  200. fisher 800c phase inverter adjustment 2
  201. Quick Transformer Question
  202. Power supply for Heathkit
  203. low-power output tube quality
  204. Conn Caprice organ
  205. Conservation of tubes
  206. Brimar EM87
  207. Tube sockets without the ceramic carrier.
  208. SET with tube-based CCS???
  209. fisher 800c modifications
  210. Bottlehead meet.
  211. Tie cathode to heater??
  212. anyone seen it tried like this?
  213. What do people think of the SETH 2A3 PP?
  214. Very high plate voltage EL34 amp
  215. How About Bridging SE
  216. Fisher 800c Has Odd Cathode Reading
  217. What part of DIY do you LOVE?
  218. Priboi tweakers ?
  219. 5751 and 12ax7
  220. LM317 + ceramic cap Q
  221. Derive Triode Curves from Pentode Curves?
  222. 7701 distortion device?
  223. Looking for the perfect giftshop
  224. 300b
  225. Choked ripple killer for SE?
  226. Dynaco Kits
  227. Positive bias for tube CF?
  228. need help
  229. Xindak attenuation for use with Leak Stereo 20, help please
  230. Series heaters = small problem?
  231. Recommend an EL84 tube for HIFI
  232. Help - need some info on this valve amp, please
  233. H. Olson's amps
  234. 12AT7 and the Simple EL84
  235. New K-12g only one channel working
  236. Kofi Annan in: "Kofi Makes a 300b DRD... and You Get to Help!"
  237. Rauland Borg 6L6 amp Need Info
  238. Hum Noise!
  239. Tube regulator for solidstate devices
  240. 6gu7 a sub for 6cg7/6fq7?
  241. obsession sd-600 300b mono block
  242. how do you know you need matched pair?
  243. Nobu Shishido's 805 SET interstage
  244. KT88SE, turning OPT
  245. New to tubes.
  246. OB with.......well, TL Audio's iTUBE :)
  247. Matched tubes required?
  248. GU-50 output trafo
  249. Are Hammond power transformers good enough ?
  250. Transformers.

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