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  1. Tube choice for Class A2
  2. hybrid graetz in PSUDII
  3. 6C45P Spud
  4. Philips ECG 12AX7WA or GE 5751 ?? Opinions, please.
  5. Single Ended EL34 Amp
  6. Rp / Rk on Aikido preamp
  7. hum in amp!
  8. Looking for a 83 rectifier model
  9. Advice wanted on ebay SET amps
  10. Resistors for ultralinear-to-triode conversion
  11. Gary Pimm
  12. resistor values for lifting ground AND LED
  13. output transformer impedance choices
  14. Feedback disc recording amp
  15. 6bm8/ECL82 vs EL84
  16. B+ filter caps
  17. (Newbie) CSS Question
  18. 6P15P Tubes: Push Pull Possible?
  19. Tube X-ref list ??
  20. AVO tube tester spares
  21. Add gain before or after the phase splitter?
  22. ping SY: Red Light LED question
  23. Greinacher voltage multiplier
  24. Dead channel
  25. Euphonia is back!
  26. What's the best 417A & 437A?
  27. Eico ST70 OPT / Schematic Question
  28. Is this feasible?
  29. Repairing 805 tubes
  30. jadis defy 7 help
  31. 6n1p Screen
  32. Mc275ce
  33. Are these tubes are the same?
  34. "King of tube(s) for line-stages"
  35. Acoustic Plan PhonoMaster
  36. Heathkit AA-81 schematic
  37. has anyone kept a copy of gpimm's latest self-biasing CCS?
  38. How to wire inductor - s and n
  39. Rogers Cadet III schematics Corrections
  40. Hickok TV-7/U restoration advice needed.
  41. Rogers Cadet III to SY's Red Light District or Gingertubes's Baby Huey
  42. 24v Aikido for newb.
  43. Powering Up Old Tube Amps/Receivers
  44. preliminary schematic drawing rev.1a
  45. Not a typical MKIII Dynaco.
  46. mosfet buffer for power stage
  47. EI KT-90 news
  48. 304TL based Class A
  49. Purchasing NOS Tubes
  50. tube power supply design resources
  51. High Voltage Regulator Design
  52. max. output for two 5881 tubes?
  53. Excessive current draw in Fender Deville
  54. driving your power stage
  55. Need schematic Cary Audio SLP-70 preamp
  56. Bridge-balanced amplifiers
  57. Tell-tale signs of good feedback usage?
  58. Any mid priced SE transformers around?
  59. Bias resistor
  60. Some sneek peeks
  61. Old radio with 4 pin sockets, info?
  62. need help on pot tapers
  63. A typical KT88 tubes
  64. amplifier for unknown output transformers?
  65. vista audio
  66. CV4014 and 5650 - any audio application of these tubes?
  67. SVP-PRO schematic
  68. Looking for a good source for attenuators
  69. Center-tap to ground?
  70. 6n1p-ev operating points
  71. where to find old pot's with switch built in
  72. Maggie refurb project
  73. Parafeed output
  74. Hirtel junior stereo italian tube amp
  75. power supply help
  76. 7189/7189A Problem
  77. Glow modulation tubes
  78. Transformer Hum leaks to Speakers
  79. EAR Yoshino V20 Amplifier
  80. Repair a tube tester?
  81. starting PP - 6p3s
  82. 6BL7 rA in PP
  83. Why such high plate voltage in 2A3 DRD?
  84. to parafeed or not to parafeed that is the question
  85. Lowering voltage output of transformer
  86. Using EL34 in a line stage
  87. peerless transfomer information
  88. Output transformer design for SS amp
  89. CD source fortube amp
  90. What's the SIMPLEST 50W or higher Amp Schematic but best sound you've heard ?
  91. BIG tube amplifier, two qbl5/3500 tubes
  92. EL34 or 6L6 mono help me please!!
  93. Why don't we use output tubes as cathode followers?
  94. 6C33 driver recommendations
  95. 100watt power, fixed gain far cleaner than Marshall amp any sugestion
  96. Minimum Zener Current with Pass Device
  97. Favorite easy 6V6 push-pull circuit?
  98. Tubecad soft-clipping circuit
  99. broskie voltage regulator
  100. E88CC dissipation in Aikido
  101. Magnavox 6BQ5/EL84 and Mr. Gabe
  102. Aikido hum has me stumped !!!!
  103. 5842 and 5842 WA for 300B
  104. Basic tube combination question.
  105. Resistive ps voltage follower
  106. First time DIY tube
  107. Need help with hum and faint left channel on my S5 Electronics kit
  108. grid impedence of paralleled tubes in push pull
  109. Fender Bassman PT Rewind
  110. rectification
  111. 6AU6 Varieties
  112. EMI tubes (British made)
  113. valve wear symptoms?
  114. Standby switch, snap, crackle, pop?
  115. Aikido PSU questions (Bas Boards)
  116. one tube amps
  117. Intermittant Clicking
  118. How to solve noise/storing/on car Tube Amp ? any Schematic ?
  119. Series MOSFET regulator better with just voltage ref on gate or with error amp?
  120. Tube spice models
  121. Audible Illusions Modulus faulty?
  122. Ei Tubes..
  123. more output transformer questions
  124. 6C33 design comments?
  125. Current production EL34
  126. Impedance matching
  127. question about multiple input transformer in same tube mic pre.
  128. One tube preamp
  129. Help 6G-E12A pinout??
  130. DIY Jadis JA 30 power amp PCB
  131. output tube options
  132. wanted: accurate 257 tube tester manual
  133. Developing a "universal" tube power supply PCB
  134. Looking for a Cover....
  135. EL34 Sound
  136. Pinout ECC83 to ECC808
  137. How to convert S5 K-12g kit to dual mono?
  138. EL84 + EF86
  139. Tube amps, power and speaker impedance
  140. How to figure output Z of SRPP?
  141. Rose RV23 preamp
  142. Wanted RIAA stage with 6SN7
  143. Help with PSU Design
  144. Tetrode output stage
  145. New amplifier project -my layout
  146. jadis ja 30
  147. Aikido Attenuator kit question
  148. Fender Delux Reverb AB763
  149. Weird crackling sound without B+ applied
  150. More Aikido questions...........
  151. 6C41C in OTL?
  152. Looking for Voss-Ellis article
  153. 807 E-Linear
  154. ECC86 model
  155. Tube ID & Code Help Needed
  156. PS Decoupling question
  157. Need help in trouble-shooting my AES Sixpacs amp
  158. Space between power tubes
  159. Schematic please? SRPP with current source cathode follower
  160. Series connecting output Transformers.
  161. 6C45-Pi battery RIAA/Pre sugestions?
  162. Good News For EI Tube Fans
  163. My 300B project...
  164. building Single Ended amps
  165. Higher power amps using 807's or 1625's
  166. Project using Eico ST 70 Iron?
  167. M-1 amplifier kit - full documentation in public domain now
  168. Sus tubes ?
  169. Adjusting BIAS
  170. "Shrine" SE Amp using 6AH6 and 1625
  171. MFA Lumi - possible to "un-darken" the sound signature?
  172. Output transformers resistance
  173. Aikido heaters
  174. Return to Aikido Hum issues
  175. Looking for Schematic 6550 tube amp triode mode more than 35Watt ?
  176. Compare the sound of 6550 amp to a 6L6 amp
  177. Biasing a valve amp
  178. Scoundrel days
  179. Counterpoint SA100 one channel doesn´t work
  180. Hepl me circuit 6h30
  181. 6LR8 Amp Preliminary Questions
  182. Another 6L6 schematic
  183. 6S19P Amplifier
  184. An idea for a PL84 amp with toroidal interstage.
  185. 417A-300B Plate Choke or Interstage Coupled?
  186. Identifying an unknown tube
  187. Looking for EL34 PP Schematic Amp ? at least 35Watt
  188. ADVICE on Valvestate crunch, but all tube instead.
  189. Help diagnosing noise
  190. st70 blowout
  191. Gu81-m
  192. 6c4 pre-amp circuit
  193. 6SN7 6.3 V heater supply
  194. 2C26 &E1148's
  195. First ECL82 amp probs.
  196. JE Labs ST2A3DX
  197. Punchy 813 Poweramp
  198. Hum in AE K502 or K12m
  199. SE 6SN7 amp....
  200. Audio Innovations 800C schematic or even better service manual?
  201. Music angel amps
  202. Low gain 9-pin tubes for Aikido?
  203. JADIS ORCHESTRA IN PCB (original is hardwire)
  204. Blown Valve in ARC VT50 - help
  205. LAMM ML3 *Signature*
  206. Diode for DC heater
  207. Calculating shunt reg source impedance
  208. Marant 7c preamp diyzone project
  209. PSU Caps for an EL34 SET
  210. high gain 12ax7 preamp from scratch?
  211. IXYS 10M45 chip CCS
  212. Octal Aikido? What tubes?
  213. Tube power supply questions
  214. 6J5 input swing
  215. Checking spice model plate curve accuracy
  216. How many Ohm for triode strapping?
  217. Power supply for Heathkit WA-P2 pre-amplifier
  218. Bogen MX-60a tune-up
  219. dynaco st35 clone problem
  220. Edcor OPT's
  221. ECC40 cascode
  222. Air Vane RIAA Tuning Question
  223. Tube Noob! need help with tubes lots of tubes
  224. bias adjust installation, bogen mo-100a mo 100a quicksilver
  225. 6EM7 Amp
  226. 40mu tube preamp suggestions?
  227. Safe installation of interstage
  228. I've built some amps, need suggestions for a DIY preamp or line stage
  229. CRD diode CCS any good <1mA?
  230. Help fixing a Border Patrol Power Amp
  231. TAD-60 schematics / mods
  232. Selling tube amps
  233. Drd 300b Pse
  234. Hammond Transformer Winding Resistance -- 369GX
  235. The meaning of VA in a TX
  236. Ucl85
  237. Best way to measure cathode follower current
  238. Neuman U47
  239. OT: Season's greetings to all
  240. Anyone have experience with a 6AN4...?
  241. L-pad instead of H-pad??
  242. valve regulated psu
  243. looking for metal enclosure for custom preamps
  244. basie+aikido preamp
  245. Input Switch?
  246. Help me please
  247. Congratulations, you just built a $2K antenna !
  248. Sonic Frontiers Line 2, please help?
  249. Sovtec 12AX7
  250. removing AC Hum on Aikido????

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