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

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