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  1. A typical KT88 tubes
  2. amplifier for unknown output transformers?
  3. vista audio
  4. CV4014 and 5650 - any audio application of these tubes?
  5. SVP-PRO schematic
  6. Looking for a good source for attenuators
  7. Center-tap to ground?
  8. 6n1p-ev operating points
  9. where to find old pot's with switch built in
  10. Maggie refurb project
  11. Parafeed output
  12. Hirtel junior stereo italian tube amp
  13. power supply help
  14. 7189/7189A Problem
  15. Glow modulation tubes
  16. Transformer Hum leaks to Speakers
  17. EAR Yoshino V20 Amplifier
  18. starting PP - 6p3s
  19. 6BL7 rA in PP
  20. Why such high plate voltage in 2A3 DRD?
  21. to parafeed or not to parafeed that is the question
  22. Lowering voltage output of transformer
  23. Using EL34 in a line stage
  24. peerless transfomer information
  25. Output transformer design for SS amp
  26. CD source fortube amp
  27. What's the SIMPLEST 50W or higher Amp Schematic but best sound you've heard ?
  28. BIG tube amplifier, two qbl5/3500 tubes
  29. EL34 or 6L6 mono help me please!!
  30. Why don't we use output tubes as cathode followers?
  31. 6C33 driver recommendations
  32. Minimum Zener Current with Pass Device
  33. Favorite easy 6V6 push-pull circuit?
  34. Tubecad soft-clipping circuit
  35. broskie voltage regulator
  36. E88CC dissipation in Aikido
  37. Magnavox 6BQ5/EL84 and Mr. Gabe
  38. Aikido hum has me stumped !!!!
  39. 5842 and 5842 WA for 300B
  40. Basic tube combination question.
  41. Resistive ps voltage follower
  42. First time DIY tube
  43. Need help with hum and faint left channel on my S5 Electronics kit
  44. grid impedence of paralleled tubes in push pull
  45. rectification
  46. 6AU6 Varieties
  47. EMI tubes (British made)
  48. valve wear symptoms?
  49. Standby switch, snap, crackle, pop?
  50. Aikido PSU questions (Bas Boards)
  51. one tube amps
  52. Intermittant Clicking
  53. How to solve noise/storing/on car Tube Amp ? any Schematic ?
  54. Series MOSFET regulator better with just voltage ref on gate or with error amp?
  55. Tube spice models
  56. Audible Illusions Modulus faulty?
  57. Ei Tubes..
  58. more output transformer questions
  59. 6C33 design comments?
  60. Current production EL34
  61. Impedance matching
  62. question about multiple input transformer in same tube mic pre.
  63. One tube preamp
  64. Help 6G-E12A pinout??
  65. DIY Jadis JA 30 power amp PCB
  66. output tube options
  67. Developing a "universal" tube power supply PCB
  68. Looking for a Cover....
  69. EL34 Sound
  70. Pinout ECC83 to ECC808
  71. How to convert S5 K-12g kit to dual mono?
  72. EL84 + EF86
  73. Tube amps, power and speaker impedance
  74. How to figure output Z of SRPP?
  75. Rose RV23 preamp
  76. Wanted RIAA stage with 6SN7
  77. Help with PSU Design
  78. Tetrode output stage
  79. New amplifier project -my layout
  80. jadis ja 30
  81. Aikido Attenuator kit question
  82. Weird crackling sound without B+ applied
  83. More Aikido questions...........
  84. 6C41C in OTL?
  85. Looking for Voss-Ellis article
  86. 807 E-Linear
  87. ECC86 model
  88. Tube ID & Code Help Needed
  89. PS Decoupling question
  90. Need help in trouble-shooting my AES Sixpacs amp
  91. Space between power tubes
  92. Schematic please? SRPP with current source cathode follower
  93. Series connecting output Transformers.
  94. 6C45-Pi battery RIAA/Pre sugestions?
  95. Good News For EI Tube Fans
  96. My 300B project...
  97. building Single Ended amps
  98. Higher power amps using 807's or 1625's
  99. Project using Eico ST 70 Iron?
  100. M-1 amplifier kit - full documentation in public domain now
  101. Sus tubes ?
  102. Adjusting BIAS
  103. "Shrine" SE Amp using 6AH6 and 1625
  104. MFA Lumi - possible to "un-darken" the sound signature?
  105. Output transformers resistance
  106. Aikido heaters
  107. Return to Aikido Hum issues
  108. Looking for Schematic 6550 tube amp triode mode more than 35Watt ?
  109. Compare the sound of 6550 amp to a 6L6 amp
  110. Biasing a valve amp
  111. Scoundrel days
  112. Counterpoint SA100 one channel doesn´t work
  113. Hepl me circuit 6h30
  114. 6LR8 Amp Preliminary Questions
  115. Another 6L6 schematic
  116. 6S19P Amplifier
  117. An idea for a PL84 amp with toroidal interstage.
  118. 417A-300B Plate Choke or Interstage Coupled?
  119. Identifying an unknown tube
  120. Looking for EL34 PP Schematic Amp ? at least 35Watt
  121. Help diagnosing noise
  122. st70 blowout
  123. Gu81-m
  124. 6c4 pre-amp circuit
  125. 6SN7 6.3 V heater supply
  126. 2C26 &E1148's
  127. First ECL82 amp probs.
  128. JE Labs ST2A3DX
  129. Punchy 813 Poweramp
  130. Hum in AE K502 or K12m
  131. SE 6SN7 amp....
  132. Audio Innovations 800C schematic or even better service manual?
  133. Music angel amps
  134. Low gain 9-pin tubes for Aikido?
  135. JADIS ORCHESTRA IN PCB (original is hardwire)
  136. Blown Valve in ARC VT50 - help
  137. LAMM ML3 *Signature*
  138. Diode for DC heater
  139. Calculating shunt reg source impedance
  140. Marant 7c preamp diyzone project
  141. PSU Caps for an EL34 SET
  142. high gain 12ax7 preamp from scratch?
  143. IXYS 10M45 chip CCS
  144. Octal Aikido? What tubes?
  145. Tube power supply questions
  146. 6J5 input swing
  147. Checking spice model plate curve accuracy
  148. How many Ohm for triode strapping?
  149. Power supply for Heathkit WA-P2 pre-amplifier
  150. Bogen MX-60a tune-up
  151. dynaco st35 clone problem
  152. Edcor OPT's
  153. ECC40 cascode
  154. Air Vane RIAA Tuning Question
  155. Tube Noob! need help with tubes lots of tubes
  156. bias adjust installation, bogen mo-100a mo 100a quicksilver
  157. 6EM7 Amp
  158. 40mu tube preamp suggestions?
  159. Safe installation of interstage
  160. I've built some amps, need suggestions for a DIY preamp or line stage
  161. CRD diode CCS any good <1mA?
  162. Help fixing a Border Patrol Power Amp
  163. TAD-60 schematics / mods
  164. Selling tube amps
  165. Drd 300b Pse
  166. Hammond Transformer Winding Resistance -- 369GX
  167. The meaning of VA in a TX
  168. Ucl85
  169. Best way to measure cathode follower current
  170. Neuman U47
  171. OT: Season's greetings to all
  172. Anyone have experience with a 6AN4...?
  173. L-pad instead of H-pad??
  174. valve regulated psu
  175. basie+aikido preamp
  176. Input Switch?
  177. Help me please
  178. Congratulations, you just built a $2K antenna !
  179. Sonic Frontiers Line 2, please help?
  180. Sovtec 12AX7
  181. removing AC Hum on Aikido????
  182. Stereo Build - Mikaels KT88
  183. 6V6GT scematic, any good, comments?
  184. 807 vs 811A output: Sonic preference?
  185. Cheap PP OPTs
  186. Mc C-22 Ce
  187. Transformer Coupled Linestage
  188. 6CY7 Variants
  189. EZ81 rectifier noise
  190. Any good Output Transformers from China?
  191. Aikido - alive and kicking butt (not mine!)
  192. Dead Copland CTA-501
  193. Is the E86L the industrial sister of the EL86?
  194. Hammond 1630SEA, worth trying?
  195. Using Gas Regulators
  196. Cheap and Chinese KT88 SE amp
  197. Cary v12 -> V12r Conversion Questions
  198. 15 watts loud enough?
  199. ST70 hybrid finally up and running !!
  200. The Making of a Triode
  201. Spice models
  202. HV SS bench top power supply, advice needed
  203. A new Aikido is born - and kicking butt!
  204. Preamp - DIY vs Audio Research (or similar)
  205. Stromberg-Carlson 433 : Add standby or not?
  206. All-tube digital clock
  207. audible illusions dual mono preamp
  208. Siemens/Klangfim 6.4 mono question..?
  209. James 6123 OPT Wiring Help
  210. Next Bogen Conversion soon - need phase splitter advice
  211. A basic question regarding transformer laminations
  212. TOO many volts ????!!!!
  213. Dynaco Mark VI
  214. Frankenstein
  215. Unity buffer from 7-pin triode?
  216. Heathkit WA-P2 preamp
  217. Internal shield on 6922 dual triode
  218. 6cl3, 6cj3, 6dw4, 6ck3, 6ay3
  219. 418a
  220. Is it worth biasing with a distortion analyzer ???
  221. Usefulness of 6X8 tube?
  222. reducing hum in SET amps
  223. dynamic loadline
  224. Designing Transformer-Coupled Circuits...
  225. Tube-amp power issues
  226. SCA-35 Dynaco
  227. Q on voltage swing
  228. Buzz on preamp
  229. Help- I'm new!
  230. tube phono stage
  231. Schematic for Gm70!Where to find it!
  232. getting the specs on a transformer
  233. Nixie bargraph as a audio VU-meter
  234. Unique or odd uses for the diyAudio CCS boards
  235. Balanced tube preamp for class D power amps.
  236. 117v heater tube 117n7
  237. bypassing the plate-load
  238. Is this OK for a heater supply?
  239. which gauge wire for PSU????
  240. Citation II OPT?
  241. A new project, Blue Velvet Pre Amp is ready and rocks ! ! !
  242. Suggested budget pwr sply topologies?
  243. Battery for Cathode Voltage?
  244. PO'ed at RFI
  245. 12B4-A Linestage
  246. Relay Attenuator for tube amp
  247. Aikido and K-1000 headphones?
  248. post poweramp power attenuator
  249. preamp tube for metal
  250. Favorite Output Tube?

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