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  1. Standby switch, snap, crackle, pop?
  2. Aikido PSU questions (Bas Boards)
  3. one tube amps
  4. Intermittant Clicking
  5. How to solve noise/storing/on car Tube Amp ? any Schematic ?
  6. Series MOSFET regulator better with just voltage ref on gate or with error amp?
  7. Tube spice models
  8. Audible Illusions Modulus faulty?
  9. Ei Tubes..
  10. more output transformer questions
  11. 6C33 design comments?
  12. Current production EL34
  13. Impedance matching
  14. question about multiple input transformer in same tube mic pre.
  15. One tube preamp
  16. Help 6G-E12A pinout??
  17. DIY Jadis JA 30 power amp PCB
  18. output tube options
  19. wanted: accurate 257 tube tester manual
  20. Developing a "universal" tube power supply PCB
  21. Looking for a Cover....
  22. EL34 Sound
  23. Pinout ECC83 to ECC808
  24. How to convert S5 K-12g kit to dual mono?
  25. EL84 + EF86
  26. Tube amps, power and speaker impedance
  27. How to figure output Z of SRPP?
  28. Rose RV23 preamp
  29. Wanted RIAA stage with 6SN7
  30. Help with PSU Design
  31. Tetrode output stage
  32. New amplifier project -my layout
  33. jadis ja 30
  34. Aikido Attenuator kit question
  35. Fender Delux Reverb AB763
  36. Weird crackling sound without B+ applied
  37. More Aikido questions...........
  38. 6C41C in OTL?
  39. Looking for Voss-Ellis article
  40. 807 E-Linear
  41. ECC86 model
  42. Tube ID & Code Help Needed
  43. PS Decoupling question
  44. Need help in trouble-shooting my AES Sixpacs amp
  45. Space between power tubes
  46. Schematic please? SRPP with current source cathode follower
  47. Series connecting output Transformers.
  48. 6C45-Pi battery RIAA/Pre sugestions?
  49. Good News For EI Tube Fans
  50. My 300B project...
  51. building Single Ended amps
  52. Higher power amps using 807's or 1625's
  53. Project using Eico ST 70 Iron?
  54. M-1 amplifier kit - full documentation in public domain now
  55. Sus tubes ?
  56. Adjusting BIAS
  57. "Shrine" SE Amp using 6AH6 and 1625
  58. MFA Lumi - possible to "un-darken" the sound signature?
  59. Output transformers resistance
  60. Aikido heaters
  61. Return to Aikido Hum issues
  62. Looking for Schematic 6550 tube amp triode mode more than 35Watt ?
  63. Compare the sound of 6550 amp to a 6L6 amp
  64. Biasing a valve amp
  65. Scoundrel days
  66. Counterpoint SA100 one channel doesn´t work
  67. Hepl me circuit 6h30
  68. 6LR8 Amp Preliminary Questions
  69. Another 6L6 schematic
  70. 6S19P Amplifier
  71. An idea for a PL84 amp with toroidal interstage.
  72. 417A-300B Plate Choke or Interstage Coupled?
  73. Identifying an unknown tube
  74. Looking for EL34 PP Schematic Amp ? at least 35Watt
  75. ADVICE on Valvestate crunch, but all tube instead.
  76. Help diagnosing noise
  77. st70 blowout
  78. Gu81-m
  79. 6c4 pre-amp circuit
  80. 6SN7 6.3 V heater supply
  81. 2C26 &E1148's
  82. First ECL82 amp probs.
  83. JE Labs ST2A3DX
  84. Punchy 813 Poweramp
  85. Hum in AE K502 or K12m
  86. SE 6SN7 amp....
  87. Audio Innovations 800C schematic or even better service manual?
  88. Music angel amps
  89. Low gain 9-pin tubes for Aikido?
  90. JADIS ORCHESTRA IN PCB (original is hardwire)
  91. Blown Valve in ARC VT50 - help
  92. LAMM ML3 *Signature*
  93. Diode for DC heater
  94. Calculating shunt reg source impedance
  95. Marant 7c preamp diyzone project
  96. PSU Caps for an EL34 SET
  97. high gain 12ax7 preamp from scratch?
  98. IXYS 10M45 chip CCS
  99. Octal Aikido? What tubes?
  100. Tube power supply questions
  101. 6J5 input swing
  102. Checking spice model plate curve accuracy
  103. How many Ohm for triode strapping?
  104. Power supply for Heathkit WA-P2 pre-amplifier
  105. Bogen MX-60a tune-up
  106. dynaco st35 clone problem
  107. Edcor OPT's
  108. ECC40 cascode
  109. Air Vane RIAA Tuning Question
  110. Tube Noob! need help with tubes lots of tubes
  111. bias adjust installation, bogen mo-100a mo 100a quicksilver
  112. 6EM7 Amp
  113. 40mu tube preamp suggestions?
  114. Safe installation of interstage
  115. I've built some amps, need suggestions for a DIY preamp or line stage
  116. CRD diode CCS any good <1mA?
  117. Help fixing a Border Patrol Power Amp
  118. TAD-60 schematics / mods
  119. Selling tube amps
  120. Drd 300b Pse
  121. Hammond Transformer Winding Resistance -- 369GX
  122. The meaning of VA in a TX
  123. Ucl85
  124. Best way to measure cathode follower current
  125. Neuman U47
  126. OT: Season's greetings to all
  127. Anyone have experience with a 6AN4...?
  128. L-pad instead of H-pad??
  129. valve regulated psu
  130. looking for metal enclosure for custom preamps
  131. basie+aikido preamp
  132. Input Switch?
  133. Help me please
  134. Congratulations, you just built a $2K antenna !
  135. Sonic Frontiers Line 2, please help?
  136. Sovtec 12AX7
  137. removing AC Hum on Aikido????
  138. Stereo Build - Mikaels KT88
  139. 6V6GT scematic, any good, comments?
  140. 807 vs 811A output: Sonic preference?
  141. Cheap PP OPTs
  142. Mc C-22 Ce
  143. Transformer Coupled Linestage
  144. 6CY7 Variants
  145. EZ81 rectifier noise
  146. Any good Output Transformers from China?
  147. Solid Core or Multistrand?
  148. Aikido - alive and kicking butt (not mine!)
  149. Dead Copland CTA-501
  150. Is the E86L the industrial sister of the EL86?
  151. Hammond 1630SEA, worth trying?
  152. Using Gas Regulators
  153. Cheap and Chinese KT88 SE amp
  154. Cary v12 -> V12r Conversion Questions
  155. 15 watts loud enough?
  156. ST70 hybrid finally up and running !!
  157. The Making of a Triode
  158. Spice models
  159. HV SS bench top power supply, advice needed
  160. A new Aikido is born - and kicking butt!
  161. Preamp - DIY vs Audio Research (or similar)
  162. Stromberg-Carlson 433 : Add standby or not?
  163. All-tube digital clock
  164. audible illusions dual mono preamp
  165. Siemens/Klangfim 6.4 mono question..?
  166. James 6123 OPT Wiring Help
  167. Next Bogen Conversion soon - need phase splitter advice
  168. A basic question regarding transformer laminations
  169. TOO many volts ????!!!!
  170. Dynaco Mark VI
  171. Frankenstein
  172. Unity buffer from 7-pin triode?
  173. Heathkit WA-P2 preamp
  174. Internal shield on 6922 dual triode
  175. 6cl3, 6cj3, 6dw4, 6ck3, 6ay3
  176. 418a
  177. Is it worth biasing with a distortion analyzer ???
  178. Usefulness of 6X8 tube?
  179. reducing hum in SET amps
  180. dynamic loadline
  181. Designing Transformer-Coupled Circuits...
  182. Tube-amp power issues
  183. SCA-35 Dynaco
  184. Q on voltage swing
  185. Buzz on preamp
  186. Help- I'm new!
  187. tube phono stage
  188. Schematic for Gm70!Where to find it!
  189. getting the specs on a transformer
  190. Nixie bargraph as a audio VU-meter
  191. Unique or odd uses for the diyAudio CCS boards
  192. Balanced tube preamp for class D power amps.
  193. 117v heater tube 117n7
  194. bypassing the plate-load
  195. Is this OK for a heater supply?
  196. which gauge wire for PSU????
  197. Citation II OPT?
  198. A new project, Blue Velvet Pre Amp is ready and rocks ! ! !
  199. Suggested budget pwr sply topologies?
  200. Battery for Cathode Voltage?
  201. Calbest help
  202. PO'ed at RFI
  203. 12B4-A Linestage
  204. Relay Attenuator for tube amp
  205. Aikido and K-1000 headphones?
  206. post poweramp power attenuator
  207. preamp tube for metal
  208. Favorite Output Tube?
  209. CCS Grid Bias
  210. Ring of two CCS for differential triode amp - stability?
  211. Unstacking a transformer...
  212. interconnect cable 15' long
  213. Citation II oscillating, Uh oh
  214. Regulated PowerSupply for Frank's 6SN7 Preamp
  215. Regulating G2 in Pentode Operation
  216. WE310A, a confusing issue
  217. Naming conventions
  218. Newbie: Powering up Tube Amp
  219. preference between 5842 and 6c45pi
  220. Help! first tube pre-amp with 12ax7
  221. S11E12 / 12E1: best operating point ?
  222. 6j5 trasformer coupled driver/splitter
  223. A new audio tube
  224. heretical unity gain OUTPUT stage...
  225. LL1630 Pre amp
  226. New Jensen caps has no bass in..Simple EL84PP
  227. EIMAC toobz : What sort of PSU ?
  228. Filament Transformer for 26 DHT
  229. Valve Pre for Chip Amp
  230. To hell with pride. I need help w. Grounded grid Pre-amp
  231. signal wiring / chassis grounding - Aikido
  232. Power rating for triode/pentode resistors
  233. Unity coupled power amp
  234. 6BX7 Outputs
  235. DIY Preamp for use with Dynaco ST70
  236. +B Power Supply Basics
  237. Tubes and their sweet spots.
  238. How to accomplish local feedback in pp amp ?
  239. Telefunken 5094
  240. Coupling caps size with grid choke?
  241. My first audio project
  242. Relationship Between Inductance And Current In Filter Choke
  243. Harmony H303A
  244. 6C4C - 6S4S - 6B4G op points?
  245. anyone mod a tube ultragain in here?
  246. EL84s glowing red
  247. Found a power transformer, what to do with it?
  248. Output section on preamp questions/breakdown.
  249. Transformer coupled 6AS7/6080
  250. Single Tube RIAA preamp too good to be true?

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