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  1. Advice/Help - Cap upgrade
  2. question on old tube sockets
  3. fisher sa-16 very red tube and?
  4. pros/cons of a 845 VS 211
  5. Preamp Power and Voltage Output
  6. Anyone seen these 6L6GCs before?
  7. online transformer info for newbies
  8. High voltage pseudo-triode
  9. Yes, again: mains-powered KILLER amp without a power transformer.
  10. Quicksilver 300b monoblock (KT88 conversion)
  11. Output transformer (SE) - DIY
  12. is Gary Pimm still around?
  13. carbon composition - 2 types
  14. Input attenuation on Leak amp
  15. 101D Sockets
  16. PC86, '88 RF Amplifiers
  17. Jolida SJ-302A tube swap
  18. Inductance for tweeter OPT
  19. Help me.......What is the 6SN7 ???????
  20. high DCR secondary (power transformer)
  21. Transformer power formula Help???
  22. 2A3 OTL 800 Ohm Speaker
  23. Trying to find specs on transformer core material
  24. 12AX7 suggestions?
  25. power supply (cap input)
  26. is it safe to connect these secondaries in series?
  27. Peter Millett's Uniamp with KT88
  28. Mystery transformer
  29. Can I phase split like this?
  30. How to model psud2 using tube regulator?
  31. Choke-loaded 6C33C stage
  32. EL84 as both driver and output stage.
  33. Silvertone (Sears) stereo amp
  34. Chasing hum in a new tube amp
  35. Zenith K731 AM/FM radio audio random cracking sound in FM mode
  36. 6bx7gt Se Amp
  37. Beard P100 Bias Lights
  38. Metasonix TS-21 modulator
  39. help with diyparadiso schematics
  40. electrostatic shield - nice to have or recommended or doesn't matter?
  41. Simple method for 240V from 240V line
  42. Audiophile bibliophilia nervosa
  43. Help with amp layout
  44. Why triode Mk3 is louder than stock Mk3
  45. Seduction or Cornet for phono???
  46. Please review my 6AQ5 Amp
  47. 832A PP Amp LTP
  48. Checklist to observe before applying the mains
  49. C3g driving 2a3: Triode or pentode?
  50. psud2 question and Fi Primer's 211 circuit
  51. Jolida JD-301A & Jadis DPL
  52. Headphones with a Tube Amp
  53. 6S3B-V Wire-Ended Single-Triode tube
  54. Anode stoppers
  55. Weird Quad II mains transformer help
  56. Mullard 5-20 parts list
  57. has anyone DIYed a Citation 2?
  58. Bogen/plexi conversion question
  59. Matched pair - different brands
  60. ERIC Mod 3460P Restore
  61. PV12 Preamplifier
  62. Grandma's old Capitol Console
  63. Music Angel
  64. What is the version of 45
  65. Aikido for guitar?
  66. Heathkit potted power transformer question
  67. Thermionic Cooling?
  68. What have the finest sound, the PX4 or the 45 ?
  69. value of a cap between driver tube and output tubes
  70. do matched pair (or maybe a quad) output tubes "aged" at the same rate?
  71. Mini EL84 Amp Done
  72. Overcoming Miller
  73. Heathkit Schematic model AA-50 needed
  74. Help me choose please
  75. Mono Class A SE Schematics
  76. Irish DIY Meet.
  77. Sizing PP OPT
  78. 6BQ5/EL90 guitar amp schematics wanted
  79. Do SE transfomers get hot?
  80. Aikido Questions
  81. LTP with interstage trafo
  82. 6BQ5 Push-Pull amplifier
  83. Amplifier input
  84. C#@$ quality 6L6EH's
  85. Mains toroids appear to be great for audio
  86. High bias point.
  87. ebay amp
  88. GU 50 output modification
  89. 6C41Cs Class-A PP
  90. My First Big Amp
  91. sv572-10
  92. Stupid PAS-2 Pot Questions
  93. Old electronics articles
  94. UL Feedback
  95. who know fd23 and fd422 tubes?
  96. Laptop amplifier
  97. Thoughts Of Modifying My First Tube Amp.
  98. Quick question for Eli Duttman (or others!)
  99. Blackened GZ32 glass envelopes
  100. Are these vintage vacuum tubes suitable.....
  101. Tube XP8109-02?!
  102. peak current 300B heater with start up
  103. Microphonic phono preamplifier
  104. Pentode Plate Load
  105. what monoblocks to build?
  106. All tube direct box
  107. max b+ for 6V6
  108. What speakers to go with tubes ??
  109. Bluenote Koala Tube CD Player
  110. OPTs and power for bi-amping
  111. Quick And Dirty ~75W Guitar Amp
  112. Old Diodes
  113. Father, I abused my Leak S/20
  114. 6688/E180F line stage?
  115. Variable feedback to enhance damping factor at low frequency
  116. Need assistance with picking the right Edcor audio transformer
  117. Critique my first design
  118. Biamping, phase of output?
  119. Ground star
  120. op-points for 27 pre...?
  121. Opinions/Experience of Toroidal valve amps
  122. hum, no way to get rid of it
  123. How to adjust my circuit for frequency response?
  124. Input Tubes?
  125. 6BG6 = 6L6GC with top cap - cheap!
  126. Maida Regulators Redux
  127. ground of DC bias supply
  128. does anyone the website for yaqin/mr. liung/music angel amps?
  129. plate load ccs ala gary p question
  130. Books for newbe
  131. 6AS7 OTL
  132. n00b phono preamp troubleshooting..
  133. TubelabSE - Anyone built?
  134. any example of SE designs using GM70?
  135. Shunt regulator question
  136. Any RH807 builders?
  137. Replacing multi-section caps with multiple caps?
  138. Recycle an Eico HFT-90 for a preamp
  139. EL84 PP output transformer for 6L6 PP class A
  140. Jensen PIO capacitor burn in
  141. toroid psu, weird results...
  142. Squeaky Noise in ARC Dual 75
  143. EL84 mod questions
  144. Measuring DC at preamp output
  145. Is Northern Electric the NEW W.E.?
  146. Burnt Woodside STA35 valve amp... Help!
  147. My tube preamplifier project
  148. Ponderings on hybrid 300B
  149. Maida Regulator Parts
  150. anyone familiar with the 211/vt4c circuit from Fi Primer?
  151. Calculating operating points of two DC stages
  152. Advice for retubing VTL Ichiban`s
  153. Need help
  154. Art Audio Kit on Common Ground Magazine
  155. Advice for retubing VTL Ichiban`s
  156. fisher 800c intermitant hum
  157. calling Yves....
  158. X10 Pre
  159. NEW KT66 - 6AU6 single ended
  160. mechanical hum
  161. Big valve preamp
  162. Question about biasing heater above cathode in a direct coupled circuit.
  163. center tapped choke inverter
  164. Guitar tube pre DIY suggestions..?
  165. Which One Of These Tube Amps Should I Buy?
  166. Tube Info
  167. Circuit/Equipment Designer
  168. help needed with noise in phono preamp
  169. Pentode driver and IT?
  170. Plate Caps for 832A
  171. 300b advice
  172. Designs on your noob, err, tube
  173. 7788 Triode Curves
  174. EL81/6CJ6 operating point
  175. Separate cathode resistors in push pull output
  176. C3m linestage
  177. Anyone know this 13E1 design...
  178. LTP w/ positive only supply
  179. 6V6 line preamp
  180. The 6P43P russian tube is a EL84 equivalent ??
  181. Ixys IXCP10M45s IC
  182. Help with hybrid mosfet valve amp
  183. Substitute for 6gw8 in Heathkit aa-32
  184. U-Follower: Output from Cathode or Plate?
  185. Getting rid of oscillations in the preamp
  186. has anyone used the 4-125A in SE amp ?
  187. line preamp using 6SN7 instead of 12AU7
  188. 3-pong conversion for Acoustic amplifier
  189. 6v6pp design
  190. CCS Plate Load
  191. All tube voltage doubler
  192. best value/performance ECC83 on market
  193. Help needed for my preamp
  194. 6H6p cascode differential driving 2A3 PP
  195. Best phono / line preamp
  196. Point to Point
  197. gain curve questions
  198. Questions concerning Aikido Line amp
  199. Partial cathode bypass to effect a treble boost.
  200. SE bass
  201. choke orientation
  202. Musical Fidelity X-PRE schematic
  203. Circuitmaker Spice question
  204. Trouble with a paraphase PI
  205. 27 pre PS question..
  206. 6AV5 g2 driver
  207. Calculate PSU output impedance?
  208. Output stage biasing, with the driver stage
  209. tube pedal plate voltages?
  210. grounding and 12AV6 diodes
  211. 6as7 Pse
  212. Looking for datasheets
  213. Ping Albert from Canada
  214. Old Tektronix booklet
  215. fisher 800c phase inverter adjustment 2
  216. Quick Transformer Question
  217. Power supply for Heathkit
  218. low-power output tube quality
  219. Conn Caprice organ
  220. Conservation of tubes
  221. Brimar EM87
  222. Tube sockets without the ceramic carrier.
  223. SET with tube-based CCS???
  224. fisher 800c modifications
  225. Bottlehead meet.
  226. Tie cathode to heater??
  227. anyone seen it tried like this?
  228. What do people think of the SETH 2A3 PP?
  229. Very high plate voltage EL34 amp
  230. How About Bridging SE
  231. Fisher 800c Has Odd Cathode Reading
  232. What part of DIY do you LOVE?
  233. Priboi tweakers ?
  234. 5751 and 12ax7
  235. LM317 + ceramic cap Q
  236. Derive Triode Curves from Pentode Curves?
  237. 7701 distortion device?
  238. Looking for the perfect giftshop
  239. 300b
  240. Choked ripple killer for SE?
  241. Dynaco Kits
  242. Positive bias for tube CF?
  243. need help
  244. Xindak attenuation for use with Leak Stereo 20, help please
  245. Series heaters = small problem?
  246. Recommend an EL84 tube for HIFI
  247. Help - need some info on this valve amp, please
  248. H. Olson's amps
  249. 12AT7 and the Simple EL84
  250. New K-12g only one channel working

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