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  1. Biasing a valve amp
  2. Scoundrel days
  3. Counterpoint SA100 one channel doesn´t work
  4. Hepl me circuit 6h30
  5. 6LR8 Amp Preliminary Questions
  6. Another 6L6 schematic
  7. 6S19P Amplifier
  8. An idea for a PL84 amp with toroidal interstage.
  9. 417A-300B Plate Choke or Interstage Coupled?
  10. Identifying an unknown tube
  11. Looking for EL34 PP Schematic Amp ? at least 35Watt
  12. ADVICE on Valvestate crunch, but all tube instead.
  13. Help diagnosing noise
  14. st70 blowout
  15. Gu81-m
  16. 6c4 pre-amp circuit
  17. 6SN7 6.3 V heater supply
  18. 2C26 &E1148's
  19. First ECL82 amp probs.
  20. JE Labs ST2A3DX
  21. Punchy 813 Poweramp
  22. Hum in AE K502 or K12m
  23. SE 6SN7 amp....
  24. Audio Innovations 800C schematic or even better service manual?
  25. Music angel amps
  26. Low gain 9-pin tubes for Aikido?
  27. JADIS ORCHESTRA IN PCB (original is hardwire)
  28. Blown Valve in ARC VT50 - help
  29. LAMM ML3 *Signature*
  30. Diode for DC heater
  31. Calculating shunt reg source impedance
  32. Marant 7c preamp diyzone project
  33. PSU Caps for an EL34 SET
  34. high gain 12ax7 preamp from scratch?
  35. IXYS 10M45 chip CCS
  36. Octal Aikido? What tubes?
  37. Tube power supply questions
  38. 6J5 input swing
  39. Checking spice model plate curve accuracy
  40. How many Ohm for triode strapping?
  41. Power supply for Heathkit WA-P2 pre-amplifier
  42. Bogen MX-60a tune-up
  43. dynaco st35 clone problem
  44. Edcor OPT's
  45. ECC40 cascode
  46. Air Vane RIAA Tuning Question
  47. Tube Noob! need help with tubes lots of tubes
  48. bias adjust installation, bogen mo-100a mo 100a quicksilver
  49. 6EM7 Amp
  50. 40mu tube preamp suggestions?
  51. Safe installation of interstage
  52. I've built some amps, need suggestions for a DIY preamp or line stage
  53. CRD diode CCS any good <1mA?
  54. Help fixing a Border Patrol Power Amp
  55. TAD-60 schematics / mods
  56. Selling tube amps
  57. Drd 300b Pse
  58. Hammond Transformer Winding Resistance -- 369GX
  59. The meaning of VA in a TX
  60. Ucl85
  61. Best way to measure cathode follower current
  62. Neuman U47
  63. OT: Season's greetings to all
  64. Anyone have experience with a 6AN4...?
  65. L-pad instead of H-pad??
  66. valve regulated psu
  67. looking for metal enclosure for custom preamps
  68. basie+aikido preamp
  69. Input Switch?
  70. Help me please
  71. Congratulations, you just built a $2K antenna !
  72. Sonic Frontiers Line 2, please help?
  73. Sovtec 12AX7
  74. removing AC Hum on Aikido????
  75. Stereo Build - Mikaels KT88
  76. 6V6GT scematic, any good, comments?
  77. 807 vs 811A output: Sonic preference?
  78. Cheap PP OPTs
  79. Mc C-22 Ce
  80. Transformer Coupled Linestage
  81. 6CY7 Variants
  82. EZ81 rectifier noise
  83. Any good Output Transformers from China?
  84. Solid Core or Multistrand?
  85. Aikido - alive and kicking butt (not mine!)
  86. Dead Copland CTA-501
  87. Is the E86L the industrial sister of the EL86?
  88. Hammond 1630SEA, worth trying?
  89. Using Gas Regulators
  90. Cheap and Chinese KT88 SE amp
  91. Cary v12 -> V12r Conversion Questions
  92. 15 watts loud enough?
  93. ST70 hybrid finally up and running !!
  94. The Making of a Triode
  95. Spice models
  96. HV SS bench top power supply, advice needed
  97. A new Aikido is born - and kicking butt!
  98. Preamp - DIY vs Audio Research (or similar)
  99. Stromberg-Carlson 433 : Add standby or not?
  100. All-tube digital clock
  101. audible illusions dual mono preamp
  102. Siemens/Klangfim 6.4 mono question..?
  103. James 6123 OPT Wiring Help
  104. Next Bogen Conversion soon - need phase splitter advice
  105. A basic question regarding transformer laminations
  106. TOO many volts ????!!!!
  107. Dynaco Mark VI
  108. Frankenstein
  109. Unity buffer from 7-pin triode?
  110. Heathkit WA-P2 preamp
  111. Internal shield on 6922 dual triode
  112. 6cl3, 6cj3, 6dw4, 6ck3, 6ay3
  113. 418a
  114. Is it worth biasing with a distortion analyzer ???
  115. Usefulness of 6X8 tube?
  116. reducing hum in SET amps
  117. dynamic loadline
  118. Designing Transformer-Coupled Circuits...
  119. Tube-amp power issues
  120. SCA-35 Dynaco
  121. Q on voltage swing
  122. Buzz on preamp
  123. Help- I'm new!
  124. tube phono stage
  125. Schematic for Gm70!Where to find it!
  126. getting the specs on a transformer
  127. Nixie bargraph as a audio VU-meter
  128. Unique or odd uses for the diyAudio CCS boards
  129. Balanced tube preamp for class D power amps.
  130. 117v heater tube 117n7
  131. bypassing the plate-load
  132. Is this OK for a heater supply?
  133. which gauge wire for PSU????
  134. Citation II OPT?
  135. A new project, Blue Velvet Pre Amp is ready and rocks ! ! !
  136. Suggested budget pwr sply topologies?
  137. Battery for Cathode Voltage?
  138. Calbest help
  139. PO'ed at RFI
  140. 12B4-A Linestage
  141. Relay Attenuator for tube amp
  142. Aikido and K-1000 headphones?
  143. post poweramp power attenuator
  144. preamp tube for metal
  145. Favorite Output Tube?
  146. CCS Grid Bias
  147. Ring of two CCS for differential triode amp - stability?
  148. Unstacking a transformer...
  149. interconnect cable 15' long
  150. Citation II oscillating, Uh oh
  151. Regulated PowerSupply for Frank's 6SN7 Preamp
  152. Regulating G2 in Pentode Operation
  153. WE310A, a confusing issue
  154. Naming conventions
  155. Newbie: Powering up Tube Amp
  156. preference between 5842 and 6c45pi
  157. Help! first tube pre-amp with 12ax7
  158. S11E12 / 12E1: best operating point ?
  159. 6j5 trasformer coupled driver/splitter
  160. A new audio tube
  161. heretical unity gain OUTPUT stage...
  162. LL1630 Pre amp
  163. New Jensen caps has no bass in..Simple EL84PP
  164. EIMAC toobz : What sort of PSU ?
  165. Filament Transformer for 26 DHT
  166. Valve Pre for Chip Amp
  167. To hell with pride. I need help w. Grounded grid Pre-amp
  168. signal wiring / chassis grounding - Aikido
  169. Power rating for triode/pentode resistors
  170. Unity coupled power amp
  171. 6BX7 Outputs
  172. DIY Preamp for use with Dynaco ST70
  173. +B Power Supply Basics
  174. Tubes and their sweet spots.
  175. How to accomplish local feedback in pp amp ?
  176. Telefunken 5094
  177. Coupling caps size with grid choke?
  178. My first audio project
  179. Relationship Between Inductance And Current In Filter Choke
  180. Harmony H303A
  181. 6C4C - 6S4S - 6B4G op points?
  182. anyone mod a tube ultragain in here?
  183. EL84s glowing red
  184. Found a power transformer, what to do with it?
  185. Output section on preamp questions/breakdown.
  186. Transformer coupled 6AS7/6080
  187. Single Tube RIAA preamp too good to be true?
  188. What to make?
  189. LPT with low µ triodes?
  190. Ground questions
  191. Help! Upgrade a Music Angel KT88
  192. Need schematic for EL84 PSE
  193. Old OTL circuite question
  194. sub out in my 300b se? Help me please.
  195. Interstage OPT to drive 6V6 pp amplifier
  196. Voltage label on schematics...
  197. mystery purchase of the day
  198. What about the Eimac 3-500z?
  199. How much DC offset can a tube preamp take?
  200. Low voltage drop pass tube
  201. Convergent Legend Preamp
  202. vintage tube amp repair help
  203. Lasers, Tubes, and PCB
  204. 76 operating point/max plate rating?
  205. Mullard Made Tube Source Query
  206. SE Amp with NO HUM
  207. Frrank's 6Sn7 preamp...take out coupling cap??
  208. Need Schematic or help Newcomb AV-10 turntable tube amp
  209. Tube kits for beginners
  210. Lectron JH50 Tube Bias
  211. Tone circuit and other guitar amp Q's
  212. Removing LEDs from chinese amp
  213. Project madness
  214. chinese and tube Depot amps?
  215. eml 520 v2 info
  216. Gibson GA20 schematic needed
  217. Potted Transformer Enclosure Suppliers?
  218. Rogers Cadet III Phono Stage
  219. Modding Roberts/Akai mono block tube amps
  220. Full-wave bridge
  221. Output transformers and frequency response
  222. Class A2 SET using source follower driver
  223. Rectifier that drops lots of volts?
  224. switch snubber on preamp
  225. HV supply please comment before building
  226. This is cool
  227. Gold Lion KT88 Reissues
  228. 6F8G's any good?
  229. Matching capacitors
  230. Tung-Sol (new production) 6550s
  231. Curves, curves, and more curves
  232. Help for new design..
  233. OTL SE - Help Wanted with Idea
  234. OPTs causing crosstalk?
  235. KT88 Usable range
  236. How to change tubes ??? (NEWBIE)
  237. Do I need a Trafo for the HV in my 12AU7 (ECC82)?
  238. Need some help with potentiometer.
  239. Pinout of a UTC CG-422 power transformer
  240. Simple EL34 SET; advice?
  241. Popping Noise = Clipping ?
  242. PSU for an 813 SE
  243. Single Stage Line Amp (Diff Amp) Tube?
  244. EL 84 Edicron UK vs JJ
  245. calculating HF rolloff at 20kHz from input impedance
  246. Need info on RCA 813 used in Tube Amp
  247. Baby Huey: shunt feedback doesn't work to me
  248. Audio Innovations 800mkiii output trans needed
  249. High voltage psu
  250. First tubeamp, dont laugh too hard

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