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

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