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  1. What's the SIMPLEST 50W or higher Amp Schematic but best sound you've heard ?
  2. BIG tube amplifier, two qbl5/3500 tubes
  3. EL34 or 6L6 mono help me please!!
  4. Why don't we use output tubes as cathode followers?
  5. 6C33 driver recommendations
  6. Minimum Zener Current with Pass Device
  7. Favorite easy 6V6 push-pull circuit?
  8. Tubecad soft-clipping circuit
  9. broskie voltage regulator
  10. E88CC dissipation in Aikido
  11. Magnavox 6BQ5/EL84 and Mr. Gabe
  12. Aikido hum has me stumped !!!!
  13. 5842 and 5842 WA for 300B
  14. Basic tube combination question.
  15. Resistive ps voltage follower
  16. First time DIY tube
  17. Need help with hum and faint left channel on my S5 Electronics kit
  18. grid impedence of paralleled tubes in push pull
  19. rectification
  20. 6AU6 Varieties
  21. EMI tubes (British made)
  22. valve wear symptoms?
  23. Standby switch, snap, crackle, pop?
  24. Aikido PSU questions (Bas Boards)
  25. one tube amps
  26. Intermittant Clicking
  27. How to solve noise/storing/on car Tube Amp ? any Schematic ?
  28. Series MOSFET regulator better with just voltage ref on gate or with error amp?
  29. Tube spice models
  30. Audible Illusions Modulus faulty?
  31. Ei Tubes..
  32. more output transformer questions
  33. 6C33 design comments?
  34. Current production EL34
  35. Impedance matching
  36. question about multiple input transformer in same tube mic pre.
  37. One tube preamp
  38. Help 6G-E12A pinout??
  39. DIY Jadis JA 30 power amp PCB
  40. output tube options
  41. wanted: accurate 257 tube tester manual
  42. Developing a "universal" tube power supply PCB
  43. Looking for a Cover....
  44. EL34 Sound
  45. Pinout ECC83 to ECC808
  46. How to convert S5 K-12g kit to dual mono?
  47. EL84 + EF86
  48. Tube amps, power and speaker impedance
  49. How to figure output Z of SRPP?
  50. Rose RV23 preamp
  51. Wanted RIAA stage with 6SN7
  52. Help with PSU Design
  53. Tetrode output stage
  54. New amplifier project -my layout
  55. jadis ja 30
  56. Aikido Attenuator kit question
  57. Weird crackling sound without B+ applied
  58. More Aikido questions...........
  59. 6C41C in OTL?
  60. Looking for Voss-Ellis article
  61. 807 E-Linear
  62. ECC86 model
  63. Tube ID & Code Help Needed
  64. PS Decoupling question
  65. Need help in trouble-shooting my AES Sixpacs amp
  66. Space between power tubes
  67. Schematic please? SRPP with current source cathode follower
  68. Series connecting output Transformers.
  69. 6C45-Pi battery RIAA/Pre sugestions?
  70. Good News For EI Tube Fans
  71. My 300B project...
  72. building Single Ended amps
  73. Higher power amps using 807's or 1625's
  74. Project using Eico ST 70 Iron?
  75. M-1 amplifier kit - full documentation in public domain now
  76. Sus tubes ?
  77. Adjusting BIAS
  78. "Shrine" SE Amp using 6AH6 and 1625
  79. MFA Lumi - possible to "un-darken" the sound signature?
  80. Output transformers resistance
  81. Aikido heaters
  82. Return to Aikido Hum issues
  83. Looking for Schematic 6550 tube amp triode mode more than 35Watt ?
  84. Compare the sound of 6550 amp to a 6L6 amp
  85. Biasing a valve amp
  86. Scoundrel days
  87. Counterpoint SA100 one channel doesn´t work
  88. Hepl me circuit 6h30
  89. 6LR8 Amp Preliminary Questions
  90. Another 6L6 schematic
  91. 6S19P Amplifier
  92. An idea for a PL84 amp with toroidal interstage.
  93. 417A-300B Plate Choke or Interstage Coupled?
  94. Identifying an unknown tube
  95. Looking for EL34 PP Schematic Amp ? at least 35Watt
  96. Help diagnosing noise
  97. st70 blowout
  98. Gu81-m
  99. 6c4 pre-amp circuit
  100. 6SN7 6.3 V heater supply
  101. 2C26 &E1148's
  102. First ECL82 amp probs.
  103. JE Labs ST2A3DX
  104. Punchy 813 Poweramp
  105. Hum in AE K502 or K12m
  106. SE 6SN7 amp....
  107. Audio Innovations 800C schematic or even better service manual?
  108. Music angel amps
  109. Low gain 9-pin tubes for Aikido?
  110. JADIS ORCHESTRA IN PCB (original is hardwire)
  111. Blown Valve in ARC VT50 - help
  112. LAMM ML3 *Signature*
  113. Diode for DC heater
  114. Calculating shunt reg source impedance
  115. Marant 7c preamp diyzone project
  116. PSU Caps for an EL34 SET
  117. high gain 12ax7 preamp from scratch?
  118. IXYS 10M45 chip CCS
  119. Octal Aikido? What tubes?
  120. Tube power supply questions
  121. 6J5 input swing
  122. Checking spice model plate curve accuracy
  123. How many Ohm for triode strapping?
  124. Power supply for Heathkit WA-P2 pre-amplifier
  125. Bogen MX-60a tune-up
  126. dynaco st35 clone problem
  127. Edcor OPT's
  128. ECC40 cascode
  129. Air Vane RIAA Tuning Question
  130. Tube Noob! need help with tubes lots of tubes
  131. bias adjust installation, bogen mo-100a mo 100a quicksilver
  132. 6EM7 Amp
  133. 40mu tube preamp suggestions?
  134. Safe installation of interstage
  135. I've built some amps, need suggestions for a DIY preamp or line stage
  136. CRD diode CCS any good <1mA?
  137. Help fixing a Border Patrol Power Amp
  138. TAD-60 schematics / mods
  139. Selling tube amps
  140. Drd 300b Pse
  141. Hammond Transformer Winding Resistance -- 369GX
  142. The meaning of VA in a TX
  143. Ucl85
  144. Best way to measure cathode follower current
  145. Neuman U47
  146. OT: Season's greetings to all
  147. Anyone have experience with a 6AN4...?
  148. L-pad instead of H-pad??
  149. valve regulated psu
  150. looking for metal enclosure for custom preamps
  151. basie+aikido preamp
  152. Input Switch?
  153. Help me please
  154. Congratulations, you just built a $2K antenna !
  155. Sonic Frontiers Line 2, please help?
  156. Sovtec 12AX7
  157. removing AC Hum on Aikido????
  158. Stereo Build - Mikaels KT88
  159. 6V6GT scematic, any good, comments?
  160. 807 vs 811A output: Sonic preference?
  161. Cheap PP OPTs
  162. Mc C-22 Ce
  163. Transformer Coupled Linestage
  164. 6CY7 Variants
  165. EZ81 rectifier noise
  166. Any good Output Transformers from China?
  167. Solid Core or Multistrand?
  168. Aikido - alive and kicking butt (not mine!)
  169. Dead Copland CTA-501
  170. Is the E86L the industrial sister of the EL86?
  171. Hammond 1630SEA, worth trying?
  172. Using Gas Regulators
  173. Cheap and Chinese KT88 SE amp
  174. Cary v12 -> V12r Conversion Questions
  175. 15 watts loud enough?
  176. ST70 hybrid finally up and running !!
  177. The Making of a Triode
  178. Spice models
  179. HV SS bench top power supply, advice needed
  180. A new Aikido is born - and kicking butt!
  181. Preamp - DIY vs Audio Research (or similar)
  182. Stromberg-Carlson 433 : Add standby or not?
  183. All-tube digital clock
  184. audible illusions dual mono preamp
  185. Siemens/Klangfim 6.4 mono question..?
  186. James 6123 OPT Wiring Help
  187. Next Bogen Conversion soon - need phase splitter advice
  188. A basic question regarding transformer laminations
  189. TOO many volts ????!!!!
  190. Dynaco Mark VI
  191. Frankenstein
  192. Unity buffer from 7-pin triode?
  193. Heathkit WA-P2 preamp
  194. Internal shield on 6922 dual triode
  195. 6cl3, 6cj3, 6dw4, 6ck3, 6ay3
  196. 418a
  197. Is it worth biasing with a distortion analyzer ???
  198. Usefulness of 6X8 tube?
  199. reducing hum in SET amps
  200. dynamic loadline
  201. Designing Transformer-Coupled Circuits...
  202. Tube-amp power issues
  203. SCA-35 Dynaco
  204. Q on voltage swing
  205. Buzz on preamp
  206. Help- I'm new!
  207. tube phono stage
  208. Schematic for Gm70!Where to find it!
  209. getting the specs on a transformer
  210. Nixie bargraph as a audio VU-meter
  211. Unique or odd uses for the diyAudio CCS boards
  212. Balanced tube preamp for class D power amps.
  213. 117v heater tube 117n7
  214. bypassing the plate-load
  215. Is this OK for a heater supply?
  216. which gauge wire for PSU????
  217. Citation II OPT?
  218. A new project, Blue Velvet Pre Amp is ready and rocks ! ! !
  219. Suggested budget pwr sply topologies?
  220. Battery for Cathode Voltage?
  221. Calbest help
  222. PO'ed at RFI
  223. 12B4-A Linestage
  224. Relay Attenuator for tube amp
  225. Aikido and K-1000 headphones?
  226. post poweramp power attenuator
  227. preamp tube for metal
  228. Favorite Output Tube?
  229. CCS Grid Bias
  230. Ring of two CCS for differential triode amp - stability?
  231. Unstacking a transformer...
  232. interconnect cable 15' long
  233. Citation II oscillating, Uh oh
  234. Regulated PowerSupply for Frank's 6SN7 Preamp
  235. Regulating G2 in Pentode Operation
  236. WE310A, a confusing issue
  237. Naming conventions
  238. Newbie: Powering up Tube Amp
  239. preference between 5842 and 6c45pi
  240. Help! first tube pre-amp with 12ax7
  241. S11E12 / 12E1: best operating point ?
  242. 6j5 trasformer coupled driver/splitter
  243. A new audio tube
  244. heretical unity gain OUTPUT stage...
  245. LL1630 Pre amp
  246. New Jensen caps has no bass in..Simple EL84PP
  247. EIMAC toobz : What sort of PSU ?
  248. Filament Transformer for 26 DHT
  249. Valve Pre for Chip Amp
  250. To hell with pride. I need help w. Grounded grid Pre-amp

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