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  1. Maggie refurb project
  2. Parafeed output
  3. Hirtel junior stereo italian tube amp
  4. power supply help
  5. 7189/7189A Problem
  6. Glow modulation tubes
  7. Transformer Hum leaks to Speakers
  8. EAR Yoshino V20 Amplifier
  9. starting PP - 6p3s
  10. 6BL7 rA in PP
  11. Why such high plate voltage in 2A3 DRD?
  12. to parafeed or not to parafeed that is the question
  13. Lowering voltage output of transformer
  14. Using EL34 in a line stage
  15. peerless transfomer information
  16. Output transformer design for SS amp
  17. CD source fortube amp
  18. What's the SIMPLEST 50W or higher Amp Schematic but best sound you've heard ?
  19. BIG tube amplifier, two qbl5/3500 tubes
  20. EL34 or 6L6 mono help me please!!
  21. Why don't we use output tubes as cathode followers?
  22. 6C33 driver recommendations
  23. Minimum Zener Current with Pass Device
  24. Favorite easy 6V6 push-pull circuit?
  25. Tubecad soft-clipping circuit
  26. broskie voltage regulator
  27. E88CC dissipation in Aikido
  28. Magnavox 6BQ5/EL84 and Mr. Gabe
  29. Aikido hum has me stumped !!!!
  30. 5842 and 5842 WA for 300B
  31. Basic tube combination question.
  32. Resistive ps voltage follower
  33. First time DIY tube
  34. Need help with hum and faint left channel on my S5 Electronics kit
  35. grid impedence of paralleled tubes in push pull
  36. rectification
  37. 6AU6 Varieties
  38. EMI tubes (British made)
  39. valve wear symptoms?
  40. Standby switch, snap, crackle, pop?
  41. Aikido PSU questions (Bas Boards)
  42. one tube amps
  43. Intermittant Clicking
  44. How to solve noise/storing/on car Tube Amp ? any Schematic ?
  45. Series MOSFET regulator better with just voltage ref on gate or with error amp?
  46. Tube spice models
  47. Audible Illusions Modulus faulty?
  48. Ei Tubes..
  49. more output transformer questions
  50. 6C33 design comments?
  51. Current production EL34
  52. Impedance matching
  53. question about multiple input transformer in same tube mic pre.
  54. One tube preamp
  55. Help 6G-E12A pinout??
  56. DIY Jadis JA 30 power amp PCB
  57. output tube options
  58. Developing a "universal" tube power supply PCB
  59. Looking for a Cover....
  60. EL34 Sound
  61. Pinout ECC83 to ECC808
  62. How to convert S5 K-12g kit to dual mono?
  63. EL84 + EF86
  64. Tube amps, power and speaker impedance
  65. How to figure output Z of SRPP?
  66. Rose RV23 preamp
  67. Wanted RIAA stage with 6SN7
  68. Help with PSU Design
  69. Tetrode output stage
  70. New amplifier project -my layout
  71. jadis ja 30
  72. Aikido Attenuator kit question
  73. Weird crackling sound without B+ applied
  74. More Aikido questions...........
  75. 6C41C in OTL?
  76. Looking for Voss-Ellis article
  77. 807 E-Linear
  78. ECC86 model
  79. Tube ID & Code Help Needed
  80. PS Decoupling question
  81. Need help in trouble-shooting my AES Sixpacs amp
  82. Space between power tubes
  83. Schematic please? SRPP with current source cathode follower
  84. Series connecting output Transformers.
  85. 6C45-Pi battery RIAA/Pre sugestions?
  86. Good News For EI Tube Fans
  87. My 300B project...
  88. building Single Ended amps
  89. Higher power amps using 807's or 1625's
  90. Project using Eico ST 70 Iron?
  91. M-1 amplifier kit - full documentation in public domain now
  92. Sus tubes ?
  93. Adjusting BIAS
  94. "Shrine" SE Amp using 6AH6 and 1625
  95. MFA Lumi - possible to "un-darken" the sound signature?
  96. Output transformers resistance
  97. Aikido heaters
  98. Return to Aikido Hum issues
  99. Looking for Schematic 6550 tube amp triode mode more than 35Watt ?
  100. Compare the sound of 6550 amp to a 6L6 amp
  101. Biasing a valve amp
  102. Scoundrel days
  103. Counterpoint SA100 one channel doesn´t work
  104. Hepl me circuit 6h30
  105. 6LR8 Amp Preliminary Questions
  106. Another 6L6 schematic
  107. 6S19P Amplifier
  108. An idea for a PL84 amp with toroidal interstage.
  109. 417A-300B Plate Choke or Interstage Coupled?
  110. Identifying an unknown tube
  111. Looking for EL34 PP Schematic Amp ? at least 35Watt
  112. Help diagnosing noise
  113. st70 blowout
  114. Gu81-m
  115. 6c4 pre-amp circuit
  116. 6SN7 6.3 V heater supply
  117. 2C26 &E1148's
  118. First ECL82 amp probs.
  119. JE Labs ST2A3DX
  120. Punchy 813 Poweramp
  121. Hum in AE K502 or K12m
  122. SE 6SN7 amp....
  123. Audio Innovations 800C schematic or even better service manual?
  124. Music angel amps
  125. Low gain 9-pin tubes for Aikido?
  126. JADIS ORCHESTRA IN PCB (original is hardwire)
  127. Blown Valve in ARC VT50 - help
  128. LAMM ML3 *Signature*
  129. Diode for DC heater
  130. Calculating shunt reg source impedance
  131. Marant 7c preamp diyzone project
  132. PSU Caps for an EL34 SET
  133. high gain 12ax7 preamp from scratch?
  134. IXYS 10M45 chip CCS
  135. Octal Aikido? What tubes?
  136. Tube power supply questions
  137. 6J5 input swing
  138. Checking spice model plate curve accuracy
  139. How many Ohm for triode strapping?
  140. Power supply for Heathkit WA-P2 pre-amplifier
  141. Bogen MX-60a tune-up
  142. dynaco st35 clone problem
  143. Edcor OPT's
  144. ECC40 cascode
  145. Air Vane RIAA Tuning Question
  146. Tube Noob! need help with tubes lots of tubes
  147. bias adjust installation, bogen mo-100a mo 100a quicksilver
  148. 6EM7 Amp
  149. 40mu tube preamp suggestions?
  150. Safe installation of interstage
  151. I've built some amps, need suggestions for a DIY preamp or line stage
  152. CRD diode CCS any good <1mA?
  153. Help fixing a Border Patrol Power Amp
  154. TAD-60 schematics / mods
  155. Selling tube amps
  156. Drd 300b Pse
  157. Hammond Transformer Winding Resistance -- 369GX
  158. The meaning of VA in a TX
  159. Ucl85
  160. Best way to measure cathode follower current
  161. Neuman U47
  162. OT: Season's greetings to all
  163. Anyone have experience with a 6AN4...?
  164. L-pad instead of H-pad??
  165. valve regulated psu
  166. basie+aikido preamp
  167. Input Switch?
  168. Help me please
  169. Congratulations, you just built a $2K antenna !
  170. Sonic Frontiers Line 2, please help?
  171. Sovtec 12AX7
  172. removing AC Hum on Aikido????
  173. Stereo Build - Mikaels KT88
  174. 6V6GT scematic, any good, comments?
  175. 807 vs 811A output: Sonic preference?
  176. Cheap PP OPTs
  177. Mc C-22 Ce
  178. Transformer Coupled Linestage
  179. 6CY7 Variants
  180. EZ81 rectifier noise
  181. Any good Output Transformers from China?
  182. Aikido - alive and kicking butt (not mine!)
  183. Dead Copland CTA-501
  184. Is the E86L the industrial sister of the EL86?
  185. Hammond 1630SEA, worth trying?
  186. Using Gas Regulators
  187. Cheap and Chinese KT88 SE amp
  188. Cary v12 -> V12r Conversion Questions
  189. 15 watts loud enough?
  190. ST70 hybrid finally up and running !!
  191. The Making of a Triode
  192. Spice models
  193. HV SS bench top power supply, advice needed
  194. A new Aikido is born - and kicking butt!
  195. Preamp - DIY vs Audio Research (or similar)
  196. Stromberg-Carlson 433 : Add standby or not?
  197. All-tube digital clock
  198. audible illusions dual mono preamp
  199. Siemens/Klangfim 6.4 mono question..?
  200. James 6123 OPT Wiring Help
  201. Next Bogen Conversion soon - need phase splitter advice
  202. A basic question regarding transformer laminations
  203. TOO many volts ????!!!!
  204. Dynaco Mark VI
  205. Frankenstein
  206. Unity buffer from 7-pin triode?
  207. Heathkit WA-P2 preamp
  208. Internal shield on 6922 dual triode
  209. 6cl3, 6cj3, 6dw4, 6ck3, 6ay3
  210. 418a
  211. Is it worth biasing with a distortion analyzer ???
  212. Usefulness of 6X8 tube?
  213. reducing hum in SET amps
  214. dynamic loadline
  215. Designing Transformer-Coupled Circuits...
  216. Tube-amp power issues
  217. SCA-35 Dynaco
  218. Q on voltage swing
  219. Buzz on preamp
  220. Help- I'm new!
  221. tube phono stage
  222. Schematic for Gm70!Where to find it!
  223. getting the specs on a transformer
  224. Nixie bargraph as a audio VU-meter
  225. Unique or odd uses for the diyAudio CCS boards
  226. Balanced tube preamp for class D power amps.
  227. 117v heater tube 117n7
  228. bypassing the plate-load
  229. Is this OK for a heater supply?
  230. which gauge wire for PSU????
  231. Citation II OPT?
  232. A new project, Blue Velvet Pre Amp is ready and rocks ! ! !
  233. Suggested budget pwr sply topologies?
  234. Battery for Cathode Voltage?
  235. PO'ed at RFI
  236. 12B4-A Linestage
  237. Relay Attenuator for tube amp
  238. Aikido and K-1000 headphones?
  239. post poweramp power attenuator
  240. preamp tube for metal
  241. Favorite Output Tube?
  242. CCS Grid Bias
  243. Ring of two CCS for differential triode amp - stability?
  244. Unstacking a transformer...
  245. interconnect cable 15' long
  246. Citation II oscillating, Uh oh
  247. Regulated PowerSupply for Frank's 6SN7 Preamp
  248. Regulating G2 in Pentode Operation
  249. WE310A, a confusing issue
  250. Naming conventions

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