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  1. "King of tube(s) for line-stages"
  2. Acoustic Plan PhonoMaster
  3. Heathkit AA-81 schematic
  4. has anyone kept a copy of gpimm's latest self-biasing CCS?
  5. How to wire inductor - s and n
  6. Rogers Cadet III schematics Corrections
  7. Hickok TV-7/U restoration advice needed.
  8. Rogers Cadet III to SY's Red Light District or Gingertubes's Baby Huey
  9. 24v Aikido for newb.
  10. Powering Up Old Tube Amps/Receivers
  11. preliminary schematic drawing rev.1a
  12. Not a typical MKIII Dynaco.
  13. mosfet buffer for power stage
  14. EI KT-90 news
  15. 304TL based Class A
  16. Purchasing NOS Tubes
  17. tube power supply design resources
  18. High Voltage Regulator Design
  19. max. output for two 5881 tubes?
  20. Excessive current draw in Fender Deville
  21. driving your power stage
  22. Need schematic Cary Audio SLP-70 preamp
  23. Bridge-balanced amplifiers
  24. Tell-tale signs of good feedback usage?
  25. Any mid priced SE transformers around?
  26. Bias resistor
  27. Some sneek peeks
  28. Old radio with 4 pin sockets, info?
  29. need help on pot tapers
  30. A typical KT88 tubes
  31. amplifier for unknown output transformers?
  32. vista audio
  33. CV4014 and 5650 - any audio application of these tubes?
  34. SVP-PRO schematic
  35. Looking for a good source for attenuators
  36. Center-tap to ground?
  37. 6n1p-ev operating points
  38. where to find old pot's with switch built in
  39. Maggie refurb project
  40. Parafeed output
  41. Hirtel junior stereo italian tube amp
  42. power supply help
  43. 7189/7189A Problem
  44. Glow modulation tubes
  45. Transformer Hum leaks to Speakers
  46. EAR Yoshino V20 Amplifier
  47. Repair a tube tester?
  48. starting PP - 6p3s
  49. 6BL7 rA in PP
  50. Why such high plate voltage in 2A3 DRD?
  51. to parafeed or not to parafeed that is the question
  52. Lowering voltage output of transformer
  53. Using EL34 in a line stage
  54. peerless transfomer information
  55. Output transformer design for SS amp
  56. CD source fortube amp
  57. What's the SIMPLEST 50W or higher Amp Schematic but best sound you've heard ?
  58. BIG tube amplifier, two qbl5/3500 tubes
  59. EL34 or 6L6 mono help me please!!
  60. Why don't we use output tubes as cathode followers?
  61. 6C33 driver recommendations
  62. 100watt power, fixed gain far cleaner than Marshall amp any sugestion
  63. Minimum Zener Current with Pass Device
  64. Favorite easy 6V6 push-pull circuit?
  65. Tubecad soft-clipping circuit
  66. broskie voltage regulator
  67. E88CC dissipation in Aikido
  68. Magnavox 6BQ5/EL84 and Mr. Gabe
  69. Aikido hum has me stumped !!!!
  70. 5842 and 5842 WA for 300B
  71. Basic tube combination question.
  72. Resistive ps voltage follower
  73. First time DIY tube
  74. Need help with hum and faint left channel on my S5 Electronics kit
  75. grid impedence of paralleled tubes in push pull
  76. Fender Bassman PT Rewind
  77. rectification
  78. 6AU6 Varieties
  79. EMI tubes (British made)
  80. valve wear symptoms?
  81. Standby switch, snap, crackle, pop?
  82. Aikido PSU questions (Bas Boards)
  83. one tube amps
  84. Intermittant Clicking
  85. How to solve noise/storing/on car Tube Amp ? any Schematic ?
  86. Series MOSFET regulator better with just voltage ref on gate or with error amp?
  87. Tube spice models
  88. Audible Illusions Modulus faulty?
  89. Ei Tubes..
  90. more output transformer questions
  91. 6C33 design comments?
  92. Current production EL34
  93. Impedance matching
  94. question about multiple input transformer in same tube mic pre.
  95. One tube preamp
  96. Help 6G-E12A pinout??
  97. DIY Jadis JA 30 power amp PCB
  98. output tube options
  99. wanted: accurate 257 tube tester manual
  100. Developing a "universal" tube power supply PCB
  101. Looking for a Cover....
  102. EL34 Sound
  103. Pinout ECC83 to ECC808
  104. How to convert S5 K-12g kit to dual mono?
  105. EL84 + EF86
  106. Tube amps, power and speaker impedance
  107. How to figure output Z of SRPP?
  108. Rose RV23 preamp
  109. Wanted RIAA stage with 6SN7
  110. Help with PSU Design
  111. Tetrode output stage
  112. New amplifier project -my layout
  113. jadis ja 30
  114. Aikido Attenuator kit question
  115. Fender Delux Reverb AB763
  116. Weird crackling sound without B+ applied
  117. More Aikido questions...........
  118. 6C41C in OTL?
  119. Looking for Voss-Ellis article
  120. 807 E-Linear
  121. ECC86 model
  122. Tube ID & Code Help Needed
  123. PS Decoupling question
  124. Need help in trouble-shooting my AES Sixpacs amp
  125. Space between power tubes
  126. Schematic please? SRPP with current source cathode follower
  127. Series connecting output Transformers.
  128. 6C45-Pi battery RIAA/Pre sugestions?
  129. Good News For EI Tube Fans
  130. My 300B project...
  131. building Single Ended amps
  132. Higher power amps using 807's or 1625's
  133. Project using Eico ST 70 Iron?
  134. M-1 amplifier kit - full documentation in public domain now
  135. Sus tubes ?
  136. Adjusting BIAS
  137. "Shrine" SE Amp using 6AH6 and 1625
  138. MFA Lumi - possible to "un-darken" the sound signature?
  139. Output transformers resistance
  140. Aikido heaters
  141. Return to Aikido Hum issues
  142. Looking for Schematic 6550 tube amp triode mode more than 35Watt ?
  143. Compare the sound of 6550 amp to a 6L6 amp
  144. Biasing a valve amp
  145. Scoundrel days
  146. Counterpoint SA100 one channel doesn´t work
  147. Hepl me circuit 6h30
  148. 6LR8 Amp Preliminary Questions
  149. Another 6L6 schematic
  150. 6S19P Amplifier
  151. An idea for a PL84 amp with toroidal interstage.
  152. 417A-300B Plate Choke or Interstage Coupled?
  153. Identifying an unknown tube
  154. Looking for EL34 PP Schematic Amp ? at least 35Watt
  155. ADVICE on Valvestate crunch, but all tube instead.
  156. Help diagnosing noise
  157. st70 blowout
  158. Gu81-m
  159. 6c4 pre-amp circuit
  160. 6SN7 6.3 V heater supply
  161. 2C26 &E1148's
  162. First ECL82 amp probs.
  163. JE Labs ST2A3DX
  164. Punchy 813 Poweramp
  165. Hum in AE K502 or K12m
  166. SE 6SN7 amp....
  167. Audio Innovations 800C schematic or even better service manual?
  168. Music angel amps
  169. Low gain 9-pin tubes for Aikido?
  170. JADIS ORCHESTRA IN PCB (original is hardwire)
  171. Blown Valve in ARC VT50 - help
  172. LAMM ML3 *Signature*
  173. Diode for DC heater
  174. Calculating shunt reg source impedance
  175. Marant 7c preamp diyzone project
  176. PSU Caps for an EL34 SET
  177. high gain 12ax7 preamp from scratch?
  178. IXYS 10M45 chip CCS
  179. Octal Aikido? What tubes?
  180. Tube power supply questions
  181. 6J5 input swing
  182. Checking spice model plate curve accuracy
  183. How many Ohm for triode strapping?
  184. Power supply for Heathkit WA-P2 pre-amplifier
  185. Bogen MX-60a tune-up
  186. dynaco st35 clone problem
  187. Edcor OPT's
  188. ECC40 cascode
  189. Air Vane RIAA Tuning Question
  190. Tube Noob! need help with tubes lots of tubes
  191. bias adjust installation, bogen mo-100a mo 100a quicksilver
  192. 6EM7 Amp
  193. 40mu tube preamp suggestions?
  194. Safe installation of interstage
  195. I've built some amps, need suggestions for a DIY preamp or line stage
  196. CRD diode CCS any good <1mA?
  197. Help fixing a Border Patrol Power Amp
  198. TAD-60 schematics / mods
  199. Selling tube amps
  200. Drd 300b Pse
  201. Hammond Transformer Winding Resistance -- 369GX
  202. The meaning of VA in a TX
  203. Ucl85
  204. Best way to measure cathode follower current
  205. Neuman U47
  206. OT: Season's greetings to all
  207. Anyone have experience with a 6AN4...?
  208. L-pad instead of H-pad??
  209. valve regulated psu
  210. looking for metal enclosure for custom preamps
  211. basie+aikido preamp
  212. Input Switch?
  213. Help me please
  214. Congratulations, you just built a $2K antenna !
  215. Sonic Frontiers Line 2, please help?
  216. Sovtec 12AX7
  217. removing AC Hum on Aikido????
  218. Stereo Build - Mikaels KT88
  219. 6V6GT scematic, any good, comments?
  220. 807 vs 811A output: Sonic preference?
  221. Cheap PP OPTs
  222. Mc C-22 Ce
  223. Transformer Coupled Linestage
  224. 6CY7 Variants
  225. EZ81 rectifier noise
  226. Any good Output Transformers from China?
  227. Solid Core or Multistrand?
  228. Aikido - alive and kicking butt (not mine!)
  229. Dead Copland CTA-501
  230. Is the E86L the industrial sister of the EL86?
  231. Hammond 1630SEA, worth trying?
  232. Using Gas Regulators
  233. Cheap and Chinese KT88 SE amp
  234. Cary v12 -> V12r Conversion Questions
  235. 15 watts loud enough?
  236. ST70 hybrid finally up and running !!
  237. The Making of a Triode
  238. Spice models
  239. HV SS bench top power supply, advice needed
  240. A new Aikido is born - and kicking butt!
  241. Preamp - DIY vs Audio Research (or similar)
  242. Stromberg-Carlson 433 : Add standby or not?
  243. All-tube digital clock
  244. audible illusions dual mono preamp
  245. Siemens/Klangfim 6.4 mono question..?
  246. James 6123 OPT Wiring Help
  247. Next Bogen Conversion soon - need phase splitter advice
  248. A basic question regarding transformer laminations
  249. TOO many volts ????!!!!
  250. Dynaco Mark VI

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