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

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