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  1. 6S19P Amplifier
  2. An idea for a PL84 amp with toroidal interstage.
  3. 417A-300B Plate Choke or Interstage Coupled?
  4. Identifying an unknown tube
  5. Looking for EL34 PP Schematic Amp ? at least 35Watt
  6. ADVICE on Valvestate crunch, but all tube instead.
  7. Help diagnosing noise
  8. st70 blowout
  9. Gu81-m
  10. 6c4 pre-amp circuit
  11. 6SN7 6.3 V heater supply
  12. 2C26 &E1148's
  13. First ECL82 amp probs.
  14. JE Labs ST2A3DX
  15. Punchy 813 Poweramp
  16. Hum in AE K502 or K12m
  17. SE 6SN7 amp....
  18. Audio Innovations 800C schematic or even better service manual?
  19. Music angel amps
  20. Low gain 9-pin tubes for Aikido?
  21. JADIS ORCHESTRA IN PCB (original is hardwire)
  22. Blown Valve in ARC VT50 - help
  23. LAMM ML3 *Signature*
  24. Diode for DC heater
  25. Calculating shunt reg source impedance
  26. Marant 7c preamp diyzone project
  27. PSU Caps for an EL34 SET
  28. high gain 12ax7 preamp from scratch?
  29. IXYS 10M45 chip CCS
  30. Octal Aikido? What tubes?
  31. Tube power supply questions
  32. 6J5 input swing
  33. Checking spice model plate curve accuracy
  34. How many Ohm for triode strapping?
  35. Power supply for Heathkit WA-P2 pre-amplifier
  36. Bogen MX-60a tune-up
  37. dynaco st35 clone problem
  38. Edcor OPT's
  39. ECC40 cascode
  40. Air Vane RIAA Tuning Question
  41. Tube Noob! need help with tubes lots of tubes
  42. bias adjust installation, bogen mo-100a mo 100a quicksilver
  43. 6EM7 Amp
  44. 40mu tube preamp suggestions?
  45. Safe installation of interstage
  46. I've built some amps, need suggestions for a DIY preamp or line stage
  47. CRD diode CCS any good <1mA?
  48. Help fixing a Border Patrol Power Amp
  49. TAD-60 schematics / mods
  50. Selling tube amps
  51. Drd 300b Pse
  52. Hammond Transformer Winding Resistance -- 369GX
  53. The meaning of VA in a TX
  54. Ucl85
  55. Best way to measure cathode follower current
  56. Neuman U47
  57. OT: Season's greetings to all
  58. Anyone have experience with a 6AN4...?
  59. L-pad instead of H-pad??
  60. valve regulated psu
  61. looking for metal enclosure for custom preamps
  62. basie+aikido preamp
  63. Input Switch?
  64. Help me please
  65. Congratulations, you just built a $2K antenna !
  66. Sonic Frontiers Line 2, please help?
  67. Sovtec 12AX7
  68. removing AC Hum on Aikido????
  69. Stereo Build - Mikaels KT88
  70. 6V6GT scematic, any good, comments?
  71. 807 vs 811A output: Sonic preference?
  72. Cheap PP OPTs
  73. Mc C-22 Ce
  74. Transformer Coupled Linestage
  75. 6CY7 Variants
  76. EZ81 rectifier noise
  77. Any good Output Transformers from China?
  78. Solid Core or Multistrand?
  79. Aikido - alive and kicking butt (not mine!)
  80. Dead Copland CTA-501
  81. Is the E86L the industrial sister of the EL86?
  82. Hammond 1630SEA, worth trying?
  83. Using Gas Regulators
  84. Cheap and Chinese KT88 SE amp
  85. Cary v12 -> V12r Conversion Questions
  86. 15 watts loud enough?
  87. ST70 hybrid finally up and running !!
  88. The Making of a Triode
  89. Spice models
  90. HV SS bench top power supply, advice needed
  91. A new Aikido is born - and kicking butt!
  92. Preamp - DIY vs Audio Research (or similar)
  93. Stromberg-Carlson 433 : Add standby or not?
  94. All-tube digital clock
  95. audible illusions dual mono preamp
  96. Siemens/Klangfim 6.4 mono question..?
  97. James 6123 OPT Wiring Help
  98. Next Bogen Conversion soon - need phase splitter advice
  99. A basic question regarding transformer laminations
  100. TOO many volts ????!!!!
  101. Dynaco Mark VI
  102. Frankenstein
  103. Unity buffer from 7-pin triode?
  104. Heathkit WA-P2 preamp
  105. Internal shield on 6922 dual triode
  106. 6cl3, 6cj3, 6dw4, 6ck3, 6ay3
  107. 418a
  108. Is it worth biasing with a distortion analyzer ???
  109. Usefulness of 6X8 tube?
  110. reducing hum in SET amps
  111. dynamic loadline
  112. Designing Transformer-Coupled Circuits...
  113. Tube-amp power issues
  114. SCA-35 Dynaco
  115. Q on voltage swing
  116. Buzz on preamp
  117. Help- I'm new!
  118. tube phono stage
  119. Schematic for Gm70!Where to find it!
  120. getting the specs on a transformer
  121. Nixie bargraph as a audio VU-meter
  122. Unique or odd uses for the diyAudio CCS boards
  123. Balanced tube preamp for class D power amps.
  124. 117v heater tube 117n7
  125. bypassing the plate-load
  126. Is this OK for a heater supply?
  127. which gauge wire for PSU????
  128. Citation II OPT?
  129. A new project, Blue Velvet Pre Amp is ready and rocks ! ! !
  130. Suggested budget pwr sply topologies?
  131. Battery for Cathode Voltage?
  132. Calbest help
  133. PO'ed at RFI
  134. 12B4-A Linestage
  135. Relay Attenuator for tube amp
  136. Aikido and K-1000 headphones?
  137. post poweramp power attenuator
  138. preamp tube for metal
  139. Favorite Output Tube?
  140. CCS Grid Bias
  141. Ring of two CCS for differential triode amp - stability?
  142. Unstacking a transformer...
  143. interconnect cable 15' long
  144. Citation II oscillating, Uh oh
  145. Regulated PowerSupply for Frank's 6SN7 Preamp
  146. Regulating G2 in Pentode Operation
  147. WE310A, a confusing issue
  148. Naming conventions
  149. Newbie: Powering up Tube Amp
  150. preference between 5842 and 6c45pi
  151. Help! first tube pre-amp with 12ax7
  152. S11E12 / 12E1: best operating point ?
  153. 6j5 trasformer coupled driver/splitter
  154. A new audio tube
  155. heretical unity gain OUTPUT stage...
  156. LL1630 Pre amp
  157. New Jensen caps has no bass in..Simple EL84PP
  158. EIMAC toobz : What sort of PSU ?
  159. Filament Transformer for 26 DHT
  160. Valve Pre for Chip Amp
  161. To hell with pride. I need help w. Grounded grid Pre-amp
  162. signal wiring / chassis grounding - Aikido
  163. Power rating for triode/pentode resistors
  164. Unity coupled power amp
  165. 6BX7 Outputs
  166. DIY Preamp for use with Dynaco ST70
  167. +B Power Supply Basics
  168. Tubes and their sweet spots.
  169. How to accomplish local feedback in pp amp ?
  170. Telefunken 5094
  171. Coupling caps size with grid choke?
  172. My first audio project
  173. Relationship Between Inductance And Current In Filter Choke
  174. Harmony H303A
  175. 6C4C - 6S4S - 6B4G op points?
  176. anyone mod a tube ultragain in here?
  177. EL84s glowing red
  178. Found a power transformer, what to do with it?
  179. Output section on preamp questions/breakdown.
  180. Transformer coupled 6AS7/6080
  181. Single Tube RIAA preamp too good to be true?
  182. What to make?
  183. LPT with low triodes?
  184. Ground questions
  185. Help! Upgrade a Music Angel KT88
  186. Need schematic for EL84 PSE
  187. Old OTL circuite question
  188. sub out in my 300b se? Help me please.
  189. Interstage OPT to drive 6V6 pp amplifier
  190. Voltage label on schematics...
  191. mystery purchase of the day
  192. What about the Eimac 3-500z?
  193. How much DC offset can a tube preamp take?
  194. Low voltage drop pass tube
  195. Convergent Legend Preamp
  196. vintage tube amp repair help
  197. Lasers, Tubes, and PCB
  198. 76 operating point/max plate rating?
  199. Mullard Made Tube Source Query
  200. SE Amp with NO HUM
  201. Frrank's 6Sn7 preamp...take out coupling cap??
  202. Need Schematic or help Newcomb AV-10 turntable tube amp
  203. Tube kits for beginners
  204. Lectron JH50 Tube Bias
  205. Tone circuit and other guitar amp Q's
  206. Removing LEDs from chinese amp
  207. Project madness
  208. chinese and tube Depot amps?
  209. eml 520 v2 info
  210. Gibson GA20 schematic needed
  211. Potted Transformer Enclosure Suppliers?
  212. Rogers Cadet III Phono Stage
  213. Modding Roberts/Akai mono block tube amps
  214. Full-wave bridge
  215. Output transformers and frequency response
  216. Class A2 SET using source follower driver
  217. Rectifier that drops lots of volts?
  218. switch snubber on preamp
  219. HV supply please comment before building
  220. This is cool
  221. Gold Lion KT88 Reissues
  222. 6F8G's any good?
  223. Matching capacitors
  224. Tung-Sol (new production) 6550s
  225. Curves, curves, and more curves
  226. Help for new design..
  227. OTL SE - Help Wanted with Idea
  228. OPTs causing crosstalk?
  229. KT88 Usable range
  230. How to change tubes ??? (NEWBIE)
  231. Do I need a Trafo for the HV in my 12AU7 (ECC82)?
  232. Need some help with potentiometer.
  233. Pinout of a UTC CG-422 power transformer
  234. Simple EL34 SET; advice?
  235. Popping Noise = Clipping ?
  236. PSU for an 813 SE
  237. Single Stage Line Amp (Diff Amp) Tube?
  238. EL 84 Edicron UK vs JJ
  239. calculating HF rolloff at 20kHz from input impedance
  240. Need info on RCA 813 used in Tube Amp
  241. Baby Huey: shunt feedback doesn't work to me
  242. Audio Innovations 800mkiii output trans needed
  243. High voltage psu
  244. First tubeamp, dont laugh too hard
  245. Newbie building d3A DRD 300B
  246. small practice amp with master volume
  247. Looking for informations on Marconi TF2331 Distortion Factor Analyser
  248. gu81m
  249. 6sc7 vs. 6su7 in LTPI duty
  250. Cascode with ECC81(12AT7)=>Morgan Jones

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