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  1. grid impedence of paralleled tubes in push pull
  2. rectification
  3. 6AU6 Varieties
  4. EMI tubes (British made)
  5. valve wear symptoms?
  6. Standby switch, snap, crackle, pop?
  7. Aikido PSU questions (Bas Boards)
  8. one tube amps
  9. Intermittant Clicking
  10. How to solve noise/storing/on car Tube Amp ? any Schematic ?
  11. Series MOSFET regulator better with just voltage ref on gate or with error amp?
  12. Tube spice models
  13. Audible Illusions Modulus faulty?
  14. Ei Tubes..
  15. more output transformer questions
  16. 6C33 design comments?
  17. Current production EL34
  18. Impedance matching
  19. question about multiple input transformer in same tube mic pre.
  20. One tube preamp
  21. Help 6G-E12A pinout??
  22. DIY Jadis JA 30 power amp PCB
  23. output tube options
  24. wanted: accurate 257 tube tester manual
  25. Developing a "universal" tube power supply PCB
  26. Looking for a Cover....
  27. EL34 Sound
  28. Pinout ECC83 to ECC808
  29. How to convert S5 K-12g kit to dual mono?
  30. EL84 + EF86
  31. Tube amps, power and speaker impedance
  32. How to figure output Z of SRPP?
  33. Rose RV23 preamp
  34. Wanted RIAA stage with 6SN7
  35. Help with PSU Design
  36. Tetrode output stage
  37. New amplifier project -my layout
  38. jadis ja 30
  39. Aikido Attenuator kit question
  40. Weird crackling sound without B+ applied
  41. More Aikido questions...........
  42. 6C41C in OTL?
  43. Looking for Voss-Ellis article
  44. 807 E-Linear
  45. ECC86 model
  46. Tube ID & Code Help Needed
  47. PS Decoupling question
  48. Need help in trouble-shooting my AES Sixpacs amp
  49. Space between power tubes
  50. Schematic please? SRPP with current source cathode follower
  51. Series connecting output Transformers.
  52. 6C45-Pi battery RIAA/Pre sugestions?
  53. Good News For EI Tube Fans
  54. My 300B project...
  55. building Single Ended amps
  56. Higher power amps using 807's or 1625's
  57. Project using Eico ST 70 Iron?
  58. M-1 amplifier kit - full documentation in public domain now
  59. Sus tubes ?
  60. Adjusting BIAS
  61. "Shrine" SE Amp using 6AH6 and 1625
  62. MFA Lumi - possible to "un-darken" the sound signature?
  63. Output transformers resistance
  64. Aikido heaters
  65. Return to Aikido Hum issues
  66. Looking for Schematic 6550 tube amp triode mode more than 35Watt ?
  67. Compare the sound of 6550 amp to a 6L6 amp
  68. Biasing a valve amp
  69. Scoundrel days
  70. Counterpoint SA100 one channel doesn´t work
  71. Hepl me circuit 6h30
  72. 6LR8 Amp Preliminary Questions
  73. Another 6L6 schematic
  74. 6S19P Amplifier
  75. An idea for a PL84 amp with toroidal interstage.
  76. 417A-300B Plate Choke or Interstage Coupled?
  77. Identifying an unknown tube
  78. Looking for EL34 PP Schematic Amp ? at least 35Watt
  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. basie+aikido preamp
  134. Input Switch?
  135. Help me please
  136. Congratulations, you just built a $2K antenna !
  137. Sonic Frontiers Line 2, please help?
  138. Sovtec 12AX7
  139. removing AC Hum on Aikido????
  140. Stereo Build - Mikaels KT88
  141. 6V6GT scematic, any good, comments?
  142. 807 vs 811A output: Sonic preference?
  143. Cheap PP OPTs
  144. Mc C-22 Ce
  145. Transformer Coupled Linestage
  146. 6CY7 Variants
  147. EZ81 rectifier noise
  148. Any good Output Transformers from China?
  149. Aikido - alive and kicking butt (not mine!)
  150. Dead Copland CTA-501
  151. Is the E86L the industrial sister of the EL86?
  152. Hammond 1630SEA, worth trying?
  153. Using Gas Regulators
  154. Cheap and Chinese KT88 SE amp
  155. Cary v12 -> V12r Conversion Questions
  156. 15 watts loud enough?
  157. ST70 hybrid finally up and running !!
  158. The Making of a Triode
  159. Spice models
  160. HV SS bench top power supply, advice needed
  161. A new Aikido is born - and kicking butt!
  162. Preamp - DIY vs Audio Research (or similar)
  163. Stromberg-Carlson 433 : Add standby or not?
  164. All-tube digital clock
  165. audible illusions dual mono preamp
  166. Siemens/Klangfim 6.4 mono question..?
  167. James 6123 OPT Wiring Help
  168. Next Bogen Conversion soon - need phase splitter advice
  169. A basic question regarding transformer laminations
  170. TOO many volts ????!!!!
  171. Dynaco Mark VI
  172. Frankenstein
  173. Unity buffer from 7-pin triode?
  174. Heathkit WA-P2 preamp
  175. Internal shield on 6922 dual triode
  176. 6cl3, 6cj3, 6dw4, 6ck3, 6ay3
  177. 418a
  178. Is it worth biasing with a distortion analyzer ???
  179. Usefulness of 6X8 tube?
  180. reducing hum in SET amps
  181. dynamic loadline
  182. Designing Transformer-Coupled Circuits...
  183. Tube-amp power issues
  184. SCA-35 Dynaco
  185. Q on voltage swing
  186. Buzz on preamp
  187. Help- I'm new!
  188. tube phono stage
  189. Schematic for Gm70!Where to find it!
  190. getting the specs on a transformer
  191. Nixie bargraph as a audio VU-meter
  192. Unique or odd uses for the diyAudio CCS boards
  193. Balanced tube preamp for class D power amps.
  194. 117v heater tube 117n7
  195. bypassing the plate-load
  196. Is this OK for a heater supply?
  197. which gauge wire for PSU????
  198. Citation II OPT?
  199. A new project, Blue Velvet Pre Amp is ready and rocks ! ! !
  200. Suggested budget pwr sply topologies?
  201. Battery for Cathode Voltage?
  202. Calbest help
  203. PO'ed at RFI
  204. 12B4-A Linestage
  205. Relay Attenuator for tube amp
  206. Aikido and K-1000 headphones?
  207. post poweramp power attenuator
  208. preamp tube for metal
  209. Favorite Output Tube?
  210. CCS Grid Bias
  211. Ring of two CCS for differential triode amp - stability?
  212. Unstacking a transformer...
  213. interconnect cable 15' long
  214. Citation II oscillating, Uh oh
  215. Regulated PowerSupply for Frank's 6SN7 Preamp
  216. Regulating G2 in Pentode Operation
  217. WE310A, a confusing issue
  218. Naming conventions
  219. Newbie: Powering up Tube Amp
  220. preference between 5842 and 6c45pi
  221. Help! first tube pre-amp with 12ax7
  222. S11E12 / 12E1: best operating point ?
  223. 6j5 trasformer coupled driver/splitter
  224. A new audio tube
  225. heretical unity gain OUTPUT stage...
  226. LL1630 Pre amp
  227. New Jensen caps has no bass in..Simple EL84PP
  228. EIMAC toobz : What sort of PSU ?
  229. Filament Transformer for 26 DHT
  230. Valve Pre for Chip Amp
  231. To hell with pride. I need help w. Grounded grid Pre-amp
  232. signal wiring / chassis grounding - Aikido
  233. Power rating for triode/pentode resistors
  234. Unity coupled power amp
  235. 6BX7 Outputs
  236. DIY Preamp for use with Dynaco ST70
  237. +B Power Supply Basics
  238. Tubes and their sweet spots.
  239. How to accomplish local feedback in pp amp ?
  240. Telefunken 5094
  241. Coupling caps size with grid choke?
  242. My first audio project
  243. Relationship Between Inductance And Current In Filter Choke
  244. Harmony H303A
  245. 6C4C - 6S4S - 6B4G op points?
  246. anyone mod a tube ultragain in here?
  247. EL84s glowing red
  248. Found a power transformer, what to do with it?
  249. Output section on preamp questions/breakdown.
  250. Transformer coupled 6AS7/6080

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