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  1. How to convert S5 K-12g kit to dual mono?
  2. EL84 + EF86
  3. Tube amps, power and speaker impedance
  4. How to figure output Z of SRPP?
  5. Rose RV23 preamp
  6. Wanted RIAA stage with 6SN7
  7. Help with PSU Design
  8. Tetrode output stage
  9. New amplifier project -my layout
  10. jadis ja 30
  11. Aikido Attenuator kit question
  12. Weird crackling sound without B+ applied
  13. More Aikido questions...........
  14. 6C41C in OTL?
  15. Looking for Voss-Ellis article
  16. 807 E-Linear
  17. ECC86 model
  18. Tube ID & Code Help Needed
  19. PS Decoupling question
  20. Need help in trouble-shooting my AES Sixpacs amp
  21. Space between power tubes
  22. Schematic please? SRPP with current source cathode follower
  23. Series connecting output Transformers.
  24. 6C45-Pi battery RIAA/Pre sugestions?
  25. Good News For EI Tube Fans
  26. My 300B project...
  27. building Single Ended amps
  28. Higher power amps using 807's or 1625's
  29. Project using Eico ST 70 Iron?
  30. M-1 amplifier kit - full documentation in public domain now
  31. Sus tubes ?
  32. Adjusting BIAS
  33. "Shrine" SE Amp using 6AH6 and 1625
  34. MFA Lumi - possible to "un-darken" the sound signature?
  35. Output transformers resistance
  36. Aikido heaters
  37. Return to Aikido Hum issues
  38. Looking for Schematic 6550 tube amp triode mode more than 35Watt ?
  39. Compare the sound of 6550 amp to a 6L6 amp
  40. Biasing a valve amp
  41. Scoundrel days
  42. Counterpoint SA100 one channel doesn´t work
  43. Hepl me circuit 6h30
  44. 6LR8 Amp Preliminary Questions
  45. Another 6L6 schematic
  46. 6S19P Amplifier
  47. An idea for a PL84 amp with toroidal interstage.
  48. 417A-300B Plate Choke or Interstage Coupled?
  49. Identifying an unknown tube
  50. Looking for EL34 PP Schematic Amp ? at least 35Watt
  51. Help diagnosing noise
  52. st70 blowout
  53. Gu81-m
  54. 6c4 pre-amp circuit
  55. 6SN7 6.3 V heater supply
  56. 2C26 &E1148's
  57. First ECL82 amp probs.
  58. JE Labs ST2A3DX
  59. Punchy 813 Poweramp
  60. Hum in AE K502 or K12m
  61. SE 6SN7 amp....
  62. Audio Innovations 800C schematic or even better service manual?
  63. Music angel amps
  64. Low gain 9-pin tubes for Aikido?
  65. JADIS ORCHESTRA IN PCB (original is hardwire)
  66. Blown Valve in ARC VT50 - help
  67. LAMM ML3 *Signature*
  68. Diode for DC heater
  69. Calculating shunt reg source impedance
  70. Marant 7c preamp diyzone project
  71. PSU Caps for an EL34 SET
  72. high gain 12ax7 preamp from scratch?
  73. IXYS 10M45 chip CCS
  74. Octal Aikido? What tubes?
  75. Tube power supply questions
  76. 6J5 input swing
  77. Checking spice model plate curve accuracy
  78. How many Ohm for triode strapping?
  79. Power supply for Heathkit WA-P2 pre-amplifier
  80. Bogen MX-60a tune-up
  81. dynaco st35 clone problem
  82. Edcor OPT's
  83. ECC40 cascode
  84. Air Vane RIAA Tuning Question
  85. Tube Noob! need help with tubes lots of tubes
  86. bias adjust installation, bogen mo-100a mo 100a quicksilver
  87. 6EM7 Amp
  88. 40mu tube preamp suggestions?
  89. Safe installation of interstage
  90. I've built some amps, need suggestions for a DIY preamp or line stage
  91. CRD diode CCS any good <1mA?
  92. Help fixing a Border Patrol Power Amp
  93. TAD-60 schematics / mods
  94. Selling tube amps
  95. Drd 300b Pse
  96. Hammond Transformer Winding Resistance -- 369GX
  97. The meaning of VA in a TX
  98. Ucl85
  99. Best way to measure cathode follower current
  100. Neuman U47
  101. OT: Season's greetings to all
  102. Anyone have experience with a 6AN4...?
  103. L-pad instead of H-pad??
  104. valve regulated psu
  105. basie+aikido preamp
  106. Input Switch?
  107. Help me please
  108. Congratulations, you just built a $2K antenna !
  109. Sonic Frontiers Line 2, please help?
  110. Sovtec 12AX7
  111. removing AC Hum on Aikido????
  112. Stereo Build - Mikaels KT88
  113. 6V6GT scematic, any good, comments?
  114. 807 vs 811A output: Sonic preference?
  115. Cheap PP OPTs
  116. Mc C-22 Ce
  117. Transformer Coupled Linestage
  118. 6CY7 Variants
  119. EZ81 rectifier noise
  120. Any good Output Transformers from China?
  121. Aikido - alive and kicking butt (not mine!)
  122. Dead Copland CTA-501
  123. Is the E86L the industrial sister of the EL86?
  124. Hammond 1630SEA, worth trying?
  125. Using Gas Regulators
  126. Cheap and Chinese KT88 SE amp
  127. Cary v12 -> V12r Conversion Questions
  128. 15 watts loud enough?
  129. ST70 hybrid finally up and running !!
  130. The Making of a Triode
  131. Spice models
  132. HV SS bench top power supply, advice needed
  133. A new Aikido is born - and kicking butt!
  134. Preamp - DIY vs Audio Research (or similar)
  135. Stromberg-Carlson 433 : Add standby or not?
  136. All-tube digital clock
  137. audible illusions dual mono preamp
  138. Siemens/Klangfim 6.4 mono question..?
  139. James 6123 OPT Wiring Help
  140. Next Bogen Conversion soon - need phase splitter advice
  141. A basic question regarding transformer laminations
  142. TOO many volts ????!!!!
  143. Dynaco Mark VI
  144. Frankenstein
  145. Unity buffer from 7-pin triode?
  146. Heathkit WA-P2 preamp
  147. Internal shield on 6922 dual triode
  148. 6cl3, 6cj3, 6dw4, 6ck3, 6ay3
  149. 418a
  150. Is it worth biasing with a distortion analyzer ???
  151. Usefulness of 6X8 tube?
  152. reducing hum in SET amps
  153. dynamic loadline
  154. Designing Transformer-Coupled Circuits...
  155. Tube-amp power issues
  156. SCA-35 Dynaco
  157. Q on voltage swing
  158. Buzz on preamp
  159. Help- I'm new!
  160. tube phono stage
  161. Schematic for Gm70!Where to find it!
  162. getting the specs on a transformer
  163. Nixie bargraph as a audio VU-meter
  164. Unique or odd uses for the diyAudio CCS boards
  165. Balanced tube preamp for class D power amps.
  166. 117v heater tube 117n7
  167. bypassing the plate-load
  168. Is this OK for a heater supply?
  169. which gauge wire for PSU????
  170. Citation II OPT?
  171. A new project, Blue Velvet Pre Amp is ready and rocks ! ! !
  172. Suggested budget pwr sply topologies?
  173. Battery for Cathode Voltage?
  174. Calbest help
  175. PO'ed at RFI
  176. 12B4-A Linestage
  177. Relay Attenuator for tube amp
  178. Aikido and K-1000 headphones?
  179. post poweramp power attenuator
  180. preamp tube for metal
  181. Favorite Output Tube?
  182. CCS Grid Bias
  183. Ring of two CCS for differential triode amp - stability?
  184. Unstacking a transformer...
  185. interconnect cable 15' long
  186. Citation II oscillating, Uh oh
  187. Regulated PowerSupply for Frank's 6SN7 Preamp
  188. Regulating G2 in Pentode Operation
  189. WE310A, a confusing issue
  190. Naming conventions
  191. Newbie: Powering up Tube Amp
  192. preference between 5842 and 6c45pi
  193. Help! first tube pre-amp with 12ax7
  194. S11E12 / 12E1: best operating point ?
  195. 6j5 trasformer coupled driver/splitter
  196. A new audio tube
  197. heretical unity gain OUTPUT stage...
  198. LL1630 Pre amp
  199. EIMAC toobz : What sort of PSU ?
  200. Filament Transformer for 26 DHT
  201. Valve Pre for Chip Amp
  202. To hell with pride. I need help w. Grounded grid Pre-amp
  203. signal wiring / chassis grounding - Aikido
  204. Power rating for triode/pentode resistors
  205. Unity coupled power amp
  206. 6BX7 Outputs
  207. DIY Preamp for use with Dynaco ST70
  208. +B Power Supply Basics
  209. Tubes and their sweet spots.
  210. How to accomplish local feedback in pp amp ?
  211. Telefunken 5094
  212. Coupling caps size with grid choke?
  213. My first audio project
  214. Relationship Between Inductance And Current In Filter Choke
  215. Harmony H303A
  216. 6C4C - 6S4S - 6B4G op points?
  217. anyone mod a tube ultragain in here?
  218. EL84s glowing red
  219. Found a power transformer, what to do with it?
  220. Output section on preamp questions/breakdown.
  221. Transformer coupled 6AS7/6080
  222. Single Tube RIAA preamp too good to be true?
  223. What to make?
  224. LPT with low µ triodes?
  225. Ground questions
  226. Help! Upgrade a Music Angel KT88
  227. Need schematic for EL84 PSE
  228. Old OTL circuite question
  229. sub out in my 300b se? Help me please.
  230. Interstage OPT to drive 6V6 pp amplifier
  231. Voltage label on schematics...
  232. mystery purchase of the day
  233. What about the Eimac 3-500z?
  234. How much DC offset can a tube preamp take?
  235. Low voltage drop pass tube
  236. Convergent Legend Preamp
  237. vintage tube amp repair help
  238. Lasers, Tubes, and PCB
  239. 76 operating point/max plate rating?
  240. Mullard Made Tube Source Query
  241. SE Amp with NO HUM
  242. Frrank's 6Sn7 preamp...take out coupling cap??
  243. Need Schematic or help Newcomb AV-10 turntable tube amp
  244. Tube kits for beginners
  245. Lectron JH50 Tube Bias
  246. Removing LEDs from chinese amp
  247. Project madness
  248. chinese and tube Depot amps?
  249. eml 520 v2 info
  250. Rogers Cadet III Phono Stage

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