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  1. 6AU6 Varieties
  2. EMI tubes (British made)
  3. valve wear symptoms?
  4. Standby switch, snap, crackle, pop?
  5. Aikido PSU questions (Bas Boards)
  6. one tube amps
  7. Intermittant Clicking
  8. How to solve noise/storing/on car Tube Amp ? any Schematic ?
  9. Series MOSFET regulator better with just voltage ref on gate or with error amp?
  10. Tube spice models
  11. Audible Illusions Modulus faulty?
  12. Ei Tubes..
  13. more output transformer questions
  14. 6C33 design comments?
  15. Current production EL34
  16. Impedance matching
  17. question about multiple input transformer in same tube mic pre.
  18. One tube preamp
  19. Help 6G-E12A pinout??
  20. DIY Jadis JA 30 power amp PCB
  21. output tube options
  22. wanted: accurate 257 tube tester manual
  23. Developing a "universal" tube power supply PCB
  24. Looking for a Cover....
  25. EL34 Sound
  26. Pinout ECC83 to ECC808
  27. How to convert S5 K-12g kit to dual mono?
  28. EL84 + EF86
  29. Tube amps, power and speaker impedance
  30. How to figure output Z of SRPP?
  31. Rose RV23 preamp
  32. Wanted RIAA stage with 6SN7
  33. Help with PSU Design
  34. Tetrode output stage
  35. New amplifier project -my layout
  36. jadis ja 30
  37. Aikido Attenuator kit question
  38. Fender Delux Reverb AB763
  39. Weird crackling sound without B+ applied
  40. More Aikido questions...........
  41. 6C41C in OTL?
  42. Looking for Voss-Ellis article
  43. 807 E-Linear
  44. ECC86 model
  45. Tube ID & Code Help Needed
  46. PS Decoupling question
  47. Need help in trouble-shooting my AES Sixpacs amp
  48. Space between power tubes
  49. Schematic please? SRPP with current source cathode follower
  50. Series connecting output Transformers.
  51. 6C45-Pi battery RIAA/Pre sugestions?
  52. Good News For EI Tube Fans
  53. My 300B project...
  54. building Single Ended amps
  55. Higher power amps using 807's or 1625's
  56. Project using Eico ST 70 Iron?
  57. M-1 amplifier kit - full documentation in public domain now
  58. Sus tubes ?
  59. Adjusting BIAS
  60. "Shrine" SE Amp using 6AH6 and 1625
  61. MFA Lumi - possible to "un-darken" the sound signature?
  62. Output transformers resistance
  63. Aikido heaters
  64. Return to Aikido Hum issues
  65. Looking for Schematic 6550 tube amp triode mode more than 35Watt ?
  66. Compare the sound of 6550 amp to a 6L6 amp
  67. Biasing a valve amp
  68. Scoundrel days
  69. Counterpoint SA100 one channel doesn´t work
  70. Hepl me circuit 6h30
  71. 6LR8 Amp Preliminary Questions
  72. Another 6L6 schematic
  73. 6S19P Amplifier
  74. An idea for a PL84 amp with toroidal interstage.
  75. 417A-300B Plate Choke or Interstage Coupled?
  76. Identifying an unknown tube
  77. Looking for EL34 PP Schematic Amp ? at least 35Watt
  78. ADVICE on Valvestate crunch, but all tube instead.
  79. Help diagnosing noise
  80. st70 blowout
  81. Gu81-m
  82. 6c4 pre-amp circuit
  83. 6SN7 6.3 V heater supply
  84. 2C26 &E1148's
  85. First ECL82 amp probs.
  86. JE Labs ST2A3DX
  87. Punchy 813 Poweramp
  88. Hum in AE K502 or K12m
  89. SE 6SN7 amp....
  90. Audio Innovations 800C schematic or even better service manual?
  91. Music angel amps
  92. Low gain 9-pin tubes for Aikido?
  93. JADIS ORCHESTRA IN PCB (original is hardwire)
  94. Blown Valve in ARC VT50 - help
  95. LAMM ML3 *Signature*
  96. Diode for DC heater
  97. Calculating shunt reg source impedance
  98. Marant 7c preamp diyzone project
  99. PSU Caps for an EL34 SET
  100. high gain 12ax7 preamp from scratch?
  101. IXYS 10M45 chip CCS
  102. Octal Aikido? What tubes?
  103. Tube power supply questions
  104. 6J5 input swing
  105. Checking spice model plate curve accuracy
  106. How many Ohm for triode strapping?
  107. Power supply for Heathkit WA-P2 pre-amplifier
  108. Bogen MX-60a tune-up
  109. dynaco st35 clone problem
  110. Edcor OPT's
  111. ECC40 cascode
  112. Air Vane RIAA Tuning Question
  113. Tube Noob! need help with tubes lots of tubes
  114. bias adjust installation, bogen mo-100a mo 100a quicksilver
  115. 6EM7 Amp
  116. 40mu tube preamp suggestions?
  117. Safe installation of interstage
  118. I've built some amps, need suggestions for a DIY preamp or line stage
  119. CRD diode CCS any good <1mA?
  120. Help fixing a Border Patrol Power Amp
  121. TAD-60 schematics / mods
  122. Selling tube amps
  123. Drd 300b Pse
  124. Hammond Transformer Winding Resistance -- 369GX
  125. The meaning of VA in a TX
  126. Ucl85
  127. Best way to measure cathode follower current
  128. Neuman U47
  129. OT: Season's greetings to all
  130. Anyone have experience with a 6AN4...?
  131. L-pad instead of H-pad??
  132. valve regulated psu
  133. looking for metal enclosure for custom preamps
  134. basie+aikido preamp
  135. Input Switch?
  136. Help me please
  137. Congratulations, you just built a $2K antenna !
  138. Sonic Frontiers Line 2, please help?
  139. Sovtec 12AX7
  140. removing AC Hum on Aikido????
  141. Stereo Build - Mikaels KT88
  142. 6V6GT scematic, any good, comments?
  143. 807 vs 811A output: Sonic preference?
  144. Cheap PP OPTs
  145. Mc C-22 Ce
  146. Transformer Coupled Linestage
  147. 6CY7 Variants
  148. EZ81 rectifier noise
  149. Any good Output Transformers from China?
  150. Solid Core or Multistrand?
  151. Aikido - alive and kicking butt (not mine!)
  152. Dead Copland CTA-501
  153. Is the E86L the industrial sister of the EL86?
  154. Hammond 1630SEA, worth trying?
  155. Using Gas Regulators
  156. Cheap and Chinese KT88 SE amp
  157. Cary v12 -> V12r Conversion Questions
  158. 15 watts loud enough?
  159. ST70 hybrid finally up and running !!
  160. The Making of a Triode
  161. Spice models
  162. HV SS bench top power supply, advice needed
  163. A new Aikido is born - and kicking butt!
  164. Preamp - DIY vs Audio Research (or similar)
  165. Stromberg-Carlson 433 : Add standby or not?
  166. All-tube digital clock
  167. audible illusions dual mono preamp
  168. Siemens/Klangfim 6.4 mono question..?
  169. James 6123 OPT Wiring Help
  170. Next Bogen Conversion soon - need phase splitter advice
  171. A basic question regarding transformer laminations
  172. TOO many volts ????!!!!
  173. Dynaco Mark VI
  174. Frankenstein
  175. Unity buffer from 7-pin triode?
  176. Heathkit WA-P2 preamp
  177. Internal shield on 6922 dual triode
  178. 6cl3, 6cj3, 6dw4, 6ck3, 6ay3
  179. 418a
  180. Is it worth biasing with a distortion analyzer ???
  181. Usefulness of 6X8 tube?
  182. reducing hum in SET amps
  183. dynamic loadline
  184. Designing Transformer-Coupled Circuits...
  185. Tube-amp power issues
  186. SCA-35 Dynaco
  187. Q on voltage swing
  188. Buzz on preamp
  189. Help- I'm new!
  190. tube phono stage
  191. Schematic for Gm70!Where to find it!
  192. getting the specs on a transformer
  193. Nixie bargraph as a audio VU-meter
  194. Unique or odd uses for the diyAudio CCS boards
  195. Balanced tube preamp for class D power amps.
  196. 117v heater tube 117n7
  197. bypassing the plate-load
  198. Is this OK for a heater supply?
  199. which gauge wire for PSU????
  200. Citation II OPT?
  201. A new project, Blue Velvet Pre Amp is ready and rocks ! ! !
  202. Suggested budget pwr sply topologies?
  203. Battery for Cathode Voltage?
  204. Calbest help
  205. PO'ed at RFI
  206. 12B4-A Linestage
  207. Relay Attenuator for tube amp
  208. Aikido and K-1000 headphones?
  209. post poweramp power attenuator
  210. preamp tube for metal
  211. Favorite Output Tube?
  212. CCS Grid Bias
  213. Ring of two CCS for differential triode amp - stability?
  214. Unstacking a transformer...
  215. interconnect cable 15' long
  216. Citation II oscillating, Uh oh
  217. Regulated PowerSupply for Frank's 6SN7 Preamp
  218. Regulating G2 in Pentode Operation
  219. WE310A, a confusing issue
  220. Naming conventions
  221. Newbie: Powering up Tube Amp
  222. preference between 5842 and 6c45pi
  223. Help! first tube pre-amp with 12ax7
  224. S11E12 / 12E1: best operating point ?
  225. 6j5 trasformer coupled driver/splitter
  226. A new audio tube
  227. heretical unity gain OUTPUT stage...
  228. LL1630 Pre amp
  229. New Jensen caps has no bass in..Simple EL84PP
  230. EIMAC toobz : What sort of PSU ?
  231. Filament Transformer for 26 DHT
  232. Valve Pre for Chip Amp
  233. To hell with pride. I need help w. Grounded grid Pre-amp
  234. signal wiring / chassis grounding - Aikido
  235. Power rating for triode/pentode resistors
  236. Unity coupled power amp
  237. 6BX7 Outputs
  238. DIY Preamp for use with Dynaco ST70
  239. +B Power Supply Basics
  240. Tubes and their sweet spots.
  241. How to accomplish local feedback in pp amp ?
  242. Telefunken 5094
  243. Coupling caps size with grid choke?
  244. My first audio project
  245. Relationship Between Inductance And Current In Filter Choke
  246. Harmony H303A
  247. 6C4C - 6S4S - 6B4G op points?
  248. anyone mod a tube ultragain in here?
  249. EL84s glowing red
  250. Found a power transformer, what to do with it?

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