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  1. Scott 299 (late) OPT's
  2. Tube magazines
  3. PP plate-choke?
  4. More Phase Splitting Questions
  5. Concertina sanity check
  6. Transformer Specs
  7. The Aikido or Moskido??
  8. KT88 PP suggestion
  9. Ultrapath line amp
  10. Gross loudspeaker cone movement when using tube amps.
  11. Pre-amp power iron advice??
  12. Class A 8417 Amp
  13. DHT output tubes and DC heating
  14. rock music and SE?
  15. Disadvantages of using Zobel and Series notch filter ?
  16. old days source
  17. Mu-follower vs common cathode w/- active load
  18. K40 or K42 Russian PIO: what would you use/recommend?
  19. CCS turning off prematurely?
  20. ESL amp again!
  21. calling Moray James, and others ..wav8 or 6BM8 schemtics--PP.
  22. Does anyone know the output transformer specs of the...
  23. SE EL84 project for my friend
  24. SE amplifier - How much power?
  25. what speakers do you use?
  26. A Tube amp for a Hostille Tube Enviornment
  27. practical choice for an amp
  28. Simple cathode CCS
  29. 2A3s in push pull; class A
  30. 5 VDC heater question
  31. Power transformer snerring.
  32. Subminiature Tube & Tripath Hybrid Integrated
  33. 211
  34. Which of these output tubes?
  35. High Voltage Heater info
  36. 6SL7 in place of a 12AX7?
  37. DHT Tubes
  38. Driving 6AQ5's
  39. schematic wanted
  40. 807s replacing 6L6GCs
  41. Shielded vs twisted pair in internal wiring
  42. tube basics: computing mu and transconductance
  43. Aluminium vs steel chassis
  44. Etf06 & 07
  45. FU 13 tubes
  46. Good Souinding Direct Replacement For 325 / OP 37
  47. how to wire 6.3VDC heater on a heater with center tap (12.6V series, 6.3V parallel)?
  48. The Russian 5U4M is a 5AR4 equivalent ?
  49. WE427A Cold Cathode Diode
  50. reversing polarity in regulated B+ and other question
  51. Anthem Integrated 1
  52. Hickok 800 settings
  53. Advice/Help - Cap upgrade
  54. question on old tube sockets
  55. fisher sa-16 very red tube and?
  56. pros/cons of a 845 VS 211
  57. Preamp Power and Voltage Output
  58. Anyone seen these 6L6GCs before?
  59. online transformer info for newbies
  60. High voltage pseudo-triode
  61. Yes, again: mains-powered KILLER amp without a power transformer.
  62. Quicksilver 300b monoblock (KT88 conversion)
  63. Output transformer (SE) - DIY
  64. is Gary Pimm still around?
  65. carbon composition - 2 types
  66. Input attenuation on Leak amp
  67. 101D Sockets
  68. PC86, '88 RF Amplifiers
  69. Jolida SJ-302A tube swap
  70. Inductance for tweeter OPT
  71. Help me.......What is the 6SN7 ???????
  72. high DCR secondary (power transformer)
  73. Transformer power formula Help???
  74. 2A3 OTL 800 Ohm Speaker
  75. Trying to find specs on transformer core material
  76. 12AX7 suggestions?
  77. power supply (cap input)
  78. is it safe to connect these secondaries in series?
  79. Peter Millett's Uniamp with KT88
  80. Mystery transformer
  81. Can I phase split like this?
  82. How to model psud2 using tube regulator?
  83. Choke-loaded 6C33C stage
  84. EL84 as both driver and output stage.
  85. Silvertone (Sears) stereo amp
  86. Chasing hum in a new tube amp
  87. Zenith K731 AM/FM radio audio random cracking sound in FM mode
  88. 6bx7gt Se Amp
  89. Beard P100 Bias Lights
  90. Metasonix TS-21 modulator
  91. help with diyparadiso schematics
  92. electrostatic shield - nice to have or recommended or doesn't matter?
  93. Simple method for 240V from 240V line
  94. Audiophile bibliophilia nervosa
  95. Help with amp layout
  96. Why triode Mk3 is louder than stock Mk3
  97. Seduction or Cornet for phono???
  98. Please review my 6AQ5 Amp
  99. 832A PP Amp LTP
  100. Checklist to observe before applying the mains
  101. C3g driving 2a3: Triode or pentode?
  102. psud2 question and Fi Primer's 211 circuit
  103. Jolida JD-301A & Jadis DPL
  104. Headphones with a Tube Amp
  105. 6S3B-V Wire-Ended Single-Triode tube
  106. Anode stoppers
  107. Weird Quad II mains transformer help
  108. Mullard 5-20 parts list
  109. has anyone DIYed a Citation 2?
  110. Bogen/plexi conversion question
  111. Matched pair - different brands
  112. ERIC Mod 3460P Restore
  113. PV12 Preamplifier
  114. Grandma's old Capitol Console
  115. Music Angel
  116. What is the version of 45
  117. Aikido for guitar?
  118. Heathkit potted power transformer question
  119. Thermionic Cooling?
  120. What have the finest sound, the PX4 or the 45 ?
  121. value of a cap between driver tube and output tubes
  122. do matched pair (or maybe a quad) output tubes "aged" at the same rate?
  123. Mini EL84 Amp Done
  124. Overcoming Miller
  125. Heathkit Schematic model AA-50 needed
  126. Help me choose please
  127. Mono Class A SE Schematics
  128. Irish DIY Meet.
  129. Sizing PP OPT
  130. 6BQ5/EL90 guitar amp schematics wanted
  131. Do SE transfomers get hot?
  132. Aikido Questions
  133. LTP with interstage trafo
  134. 6BQ5 Push-Pull amplifier
  135. Amplifier input
  136. C#@$ quality 6L6EH's
  137. Mains toroids appear to be great for audio
  138. High bias point.
  139. ebay amp
  140. GU 50 output modification
  141. 6C41Cs Class-A PP
  142. My First Big Amp
  143. sv572-10
  144. Stupid PAS-2 Pot Questions
  145. Old electronics articles
  146. UL Feedback
  147. who know fd23 and fd422 tubes?
  148. Laptop amplifier
  149. Thoughts Of Modifying My First Tube Amp.
  150. Quick question for Eli Duttman (or others!)
  151. Blackened GZ32 glass envelopes
  152. Are these vintage vacuum tubes suitable.....
  153. Tube XP8109-02?!
  154. peak current 300B heater with start up
  155. Microphonic phono preamplifier
  156. Pentode Plate Load
  157. what monoblocks to build?
  158. All tube direct box
  159. max b+ for 6V6
  160. What speakers to go with tubes ??
  161. Bluenote Koala Tube CD Player
  162. OPTs and power for bi-amping
  163. Quick And Dirty ~75W Guitar Amp
  164. Old Diodes
  165. Father, I abused my Leak S/20
  166. 6688/E180F line stage?
  167. Variable feedback to enhance damping factor at low frequency
  168. Need assistance with picking the right Edcor audio transformer
  169. Critique my first design
  170. Biamping, phase of output?
  171. Ground star
  172. op-points for 27 pre...?
  173. Opinions/Experience of Toroidal valve amps
  174. hum, no way to get rid of it
  175. How to adjust my circuit for frequency response?
  176. Input Tubes?
  177. 6BG6 = 6L6GC with top cap - cheap!
  178. Maida Regulators Redux
  179. ground of DC bias supply
  180. does anyone the website for yaqin/mr. liung/music angel amps?
  181. plate load ccs ala gary p question
  182. Books for newbe
  183. 6AS7 OTL
  184. n00b phono preamp troubleshooting..
  185. TubelabSE - Anyone built?
  186. any example of SE designs using GM70?
  187. Shunt regulator question
  188. Any RH807 builders?
  189. Replacing multi-section caps with multiple caps?
  190. Recycle an Eico HFT-90 for a preamp
  191. EL84 PP output transformer for 6L6 PP class A
  192. Jensen PIO capacitor burn in
  193. toroid psu, weird results...
  194. Squeaky Noise in ARC Dual 75
  195. EL84 mod questions
  196. Measuring DC at preamp output
  197. Is Northern Electric the NEW W.E.?
  198. Burnt Woodside STA35 valve amp... Help!
  199. My tube preamplifier project
  200. Ponderings on hybrid 300B
  201. Maida Regulator Parts
  202. anyone familiar with the 211/vt4c circuit from Fi Primer?
  203. Calculating operating points of two DC stages
  204. Advice for retubing VTL Ichiban`s
  205. Need help
  206. Art Audio Kit on Common Ground Magazine
  207. Advice for retubing VTL Ichiban`s
  208. fisher 800c intermitant hum
  209. calling Yves....
  210. X10 Pre
  211. NEW KT66 - 6AU6 single ended
  212. mechanical hum
  213. Big valve preamp
  214. Question about biasing heater above cathode in a direct coupled circuit.
  215. center tapped choke inverter
  216. Guitar tube pre DIY suggestions..?
  217. Which One Of These Tube Amps Should I Buy?
  218. Tube Info
  219. Circuit/Equipment Designer
  220. help needed with noise in phono preamp
  221. Pentode driver and IT?
  222. Plate Caps for 832A
  223. 300b advice
  224. Designs on your noob, err, tube
  225. 7788 Triode Curves
  226. EL81/6CJ6 operating point
  227. Separate cathode resistors in push pull output
  228. C3m linestage
  229. Anyone know this 13E1 design...
  230. LTP w/ positive only supply
  231. 6V6 line preamp
  232. The 6P43P russian tube is a EL84 equivalent ??
  233. Ixys IXCP10M45s IC
  234. Help with hybrid mosfet valve amp
  235. Substitute for 6gw8 in Heathkit aa-32
  236. U-Follower: Output from Cathode or Plate?
  237. Getting rid of oscillations in the preamp
  238. has anyone used the 4-125A in SE amp ?
  239. line preamp using 6SN7 instead of 12AU7
  240. 3-pong conversion for Acoustic amplifier
  241. 6v6pp design
  242. CCS Plate Load
  243. All tube voltage doubler
  244. best value/performance ECC83 on market
  245. Help needed for my preamp
  246. 6H6p cascode differential driving 2A3 PP
  247. Best phono / line preamp
  248. Point to Point
  249. gain curve questions
  250. Questions concerning Aikido Line amp

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