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  1. Current production EL34
  2. Impedance matching
  3. question about multiple input transformer in same tube mic pre.
  4. One tube preamp
  5. Help 6G-E12A pinout??
  6. DIY Jadis JA 30 power amp PCB
  7. output tube options
  8. wanted: accurate 257 tube tester manual
  9. Developing a "universal" tube power supply PCB
  10. Looking for a Cover....
  11. EL34 Sound
  12. Pinout ECC83 to ECC808
  13. How to convert S5 K-12g kit to dual mono?
  14. EL84 + EF86
  15. Tube amps, power and speaker impedance
  16. How to figure output Z of SRPP?
  17. Rose RV23 preamp
  18. Wanted RIAA stage with 6SN7
  19. Help with PSU Design
  20. Tetrode output stage
  21. New amplifier project -my layout
  22. jadis ja 30
  23. Aikido Attenuator kit question
  24. Fender Delux Reverb AB763
  25. Weird crackling sound without B+ applied
  26. More Aikido questions...........
  27. 6C41C in OTL?
  28. Looking for Voss-Ellis article
  29. 807 E-Linear
  30. ECC86 model
  31. Tube ID & Code Help Needed
  32. PS Decoupling question
  33. Need help in trouble-shooting my AES Sixpacs amp
  34. Space between power tubes
  35. Schematic please? SRPP with current source cathode follower
  36. Series connecting output Transformers.
  37. 6C45-Pi battery RIAA/Pre sugestions?
  38. Good News For EI Tube Fans
  39. My 300B project...
  40. building Single Ended amps
  41. Higher power amps using 807's or 1625's
  42. Project using Eico ST 70 Iron?
  43. M-1 amplifier kit - full documentation in public domain now
  44. Sus tubes ?
  45. Adjusting BIAS
  46. "Shrine" SE Amp using 6AH6 and 1625
  47. MFA Lumi - possible to "un-darken" the sound signature?
  48. Output transformers resistance
  49. Aikido heaters
  50. Return to Aikido Hum issues
  51. Looking for Schematic 6550 tube amp triode mode more than 35Watt ?
  52. Compare the sound of 6550 amp to a 6L6 amp
  53. Biasing a valve amp
  54. Scoundrel days
  55. Counterpoint SA100 one channel doesn´t work
  56. Hepl me circuit 6h30
  57. 6LR8 Amp Preliminary Questions
  58. Another 6L6 schematic
  59. 6S19P Amplifier
  60. An idea for a PL84 amp with toroidal interstage.
  61. 417A-300B Plate Choke or Interstage Coupled?
  62. Identifying an unknown tube
  63. Looking for EL34 PP Schematic Amp ? at least 35Watt
  64. ADVICE on Valvestate crunch, but all tube instead.
  65. Help diagnosing noise
  66. st70 blowout
  67. Gu81-m
  68. 6c4 pre-amp circuit
  69. 6SN7 6.3 V heater supply
  70. 2C26 &E1148's
  71. First ECL82 amp probs.
  72. JE Labs ST2A3DX
  73. Punchy 813 Poweramp
  74. Hum in AE K502 or K12m
  75. SE 6SN7 amp....
  76. Audio Innovations 800C schematic or even better service manual?
  77. Music angel amps
  78. Low gain 9-pin tubes for Aikido?
  79. JADIS ORCHESTRA IN PCB (original is hardwire)
  80. Blown Valve in ARC VT50 - help
  81. LAMM ML3 *Signature*
  82. Diode for DC heater
  83. Calculating shunt reg source impedance
  84. Marant 7c preamp diyzone project
  85. PSU Caps for an EL34 SET
  86. high gain 12ax7 preamp from scratch?
  87. IXYS 10M45 chip CCS
  88. Octal Aikido? What tubes?
  89. Tube power supply questions
  90. 6J5 input swing
  91. Checking spice model plate curve accuracy
  92. How many Ohm for triode strapping?
  93. Power supply for Heathkit WA-P2 pre-amplifier
  94. Bogen MX-60a tune-up
  95. dynaco st35 clone problem
  96. Edcor OPT's
  97. ECC40 cascode
  98. Air Vane RIAA Tuning Question
  99. Tube Noob! need help with tubes lots of tubes
  100. bias adjust installation, bogen mo-100a mo 100a quicksilver
  101. 6EM7 Amp
  102. 40mu tube preamp suggestions?
  103. Safe installation of interstage
  104. I've built some amps, need suggestions for a DIY preamp or line stage
  105. CRD diode CCS any good <1mA?
  106. Help fixing a Border Patrol Power Amp
  107. TAD-60 schematics / mods
  108. Selling tube amps
  109. Drd 300b Pse
  110. Hammond Transformer Winding Resistance -- 369GX
  111. The meaning of VA in a TX
  112. Ucl85
  113. Best way to measure cathode follower current
  114. Neuman U47
  115. OT: Season's greetings to all
  116. Anyone have experience with a 6AN4...?
  117. L-pad instead of H-pad??
  118. valve regulated psu
  119. looking for metal enclosure for custom preamps
  120. basie+aikido preamp
  121. Input Switch?
  122. Help me please
  123. Congratulations, you just built a $2K antenna !
  124. Sonic Frontiers Line 2, please help?
  125. Sovtec 12AX7
  126. removing AC Hum on Aikido????
  127. Stereo Build - Mikaels KT88
  128. 6V6GT scematic, any good, comments?
  129. 807 vs 811A output: Sonic preference?
  130. Cheap PP OPTs
  131. Mc C-22 Ce
  132. Transformer Coupled Linestage
  133. 6CY7 Variants
  134. EZ81 rectifier noise
  135. Any good Output Transformers from China?
  136. Solid Core or Multistrand?
  137. Aikido - alive and kicking butt (not mine!)
  138. Dead Copland CTA-501
  139. Is the E86L the industrial sister of the EL86?
  140. Hammond 1630SEA, worth trying?
  141. Using Gas Regulators
  142. Cheap and Chinese KT88 SE amp
  143. Cary v12 -> V12r Conversion Questions
  144. 15 watts loud enough?
  145. ST70 hybrid finally up and running !!
  146. The Making of a Triode
  147. Spice models
  148. HV SS bench top power supply, advice needed
  149. A new Aikido is born - and kicking butt!
  150. Preamp - DIY vs Audio Research (or similar)
  151. Stromberg-Carlson 433 : Add standby or not?
  152. All-tube digital clock
  153. audible illusions dual mono preamp
  154. Siemens/Klangfim 6.4 mono question..?
  155. James 6123 OPT Wiring Help
  156. Next Bogen Conversion soon - need phase splitter advice
  157. A basic question regarding transformer laminations
  158. TOO many volts ????!!!!
  159. Dynaco Mark VI
  160. Frankenstein
  161. Unity buffer from 7-pin triode?
  162. Heathkit WA-P2 preamp
  163. Internal shield on 6922 dual triode
  164. 6cl3, 6cj3, 6dw4, 6ck3, 6ay3
  165. 418a
  166. Is it worth biasing with a distortion analyzer ???
  167. Usefulness of 6X8 tube?
  168. reducing hum in SET amps
  169. dynamic loadline
  170. Designing Transformer-Coupled Circuits...
  171. Tube-amp power issues
  172. SCA-35 Dynaco
  173. Q on voltage swing
  174. Buzz on preamp
  175. Help- I'm new!
  176. tube phono stage
  177. Schematic for Gm70!Where to find it!
  178. getting the specs on a transformer
  179. Nixie bargraph as a audio VU-meter
  180. Unique or odd uses for the diyAudio CCS boards
  181. Balanced tube preamp for class D power amps.
  182. 117v heater tube 117n7
  183. bypassing the plate-load
  184. Is this OK for a heater supply?
  185. which gauge wire for PSU????
  186. Citation II OPT?
  187. A new project, Blue Velvet Pre Amp is ready and rocks ! ! !
  188. Suggested budget pwr sply topologies?
  189. Battery for Cathode Voltage?
  190. Calbest help
  191. PO'ed at RFI
  192. 12B4-A Linestage
  193. Relay Attenuator for tube amp
  194. Aikido and K-1000 headphones?
  195. post poweramp power attenuator
  196. preamp tube for metal
  197. Favorite Output Tube?
  198. CCS Grid Bias
  199. Ring of two CCS for differential triode amp - stability?
  200. Unstacking a transformer...
  201. interconnect cable 15' long
  202. Citation II oscillating, Uh oh
  203. Regulated PowerSupply for Frank's 6SN7 Preamp
  204. Regulating G2 in Pentode Operation
  205. WE310A, a confusing issue
  206. Naming conventions
  207. Newbie: Powering up Tube Amp
  208. preference between 5842 and 6c45pi
  209. Help! first tube pre-amp with 12ax7
  210. S11E12 / 12E1: best operating point ?
  211. 6j5 trasformer coupled driver/splitter
  212. A new audio tube
  213. heretical unity gain OUTPUT stage...
  214. LL1630 Pre amp
  215. New Jensen caps has no bass in..Simple EL84PP
  216. EIMAC toobz : What sort of PSU ?
  217. Filament Transformer for 26 DHT
  218. Valve Pre for Chip Amp
  219. To hell with pride. I need help w. Grounded grid Pre-amp
  220. signal wiring / chassis grounding - Aikido
  221. Power rating for triode/pentode resistors
  222. Unity coupled power amp
  223. 6BX7 Outputs
  224. DIY Preamp for use with Dynaco ST70
  225. +B Power Supply Basics
  226. Tubes and their sweet spots.
  227. How to accomplish local feedback in pp amp ?
  228. Telefunken 5094
  229. Coupling caps size with grid choke?
  230. My first audio project
  231. Relationship Between Inductance And Current In Filter Choke
  232. Harmony H303A
  233. 6C4C - 6S4S - 6B4G op points?
  234. anyone mod a tube ultragain in here?
  235. EL84s glowing red
  236. Found a power transformer, what to do with it?
  237. Output section on preamp questions/breakdown.
  238. Transformer coupled 6AS7/6080
  239. Single Tube RIAA preamp too good to be true?
  240. What to make?
  241. LPT with low µ triodes?
  242. Ground questions
  243. Help! Upgrade a Music Angel KT88
  244. Need schematic for EL84 PSE
  245. Old OTL circuite question
  246. sub out in my 300b se? Help me please.
  247. Interstage OPT to drive 6V6 pp amplifier
  248. Voltage label on schematics...
  249. mystery purchase of the day
  250. What about the Eimac 3-500z?

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