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  1. Help diagnosing noise
  2. st70 blowout
  3. Gu81-m
  4. 6c4 pre-amp circuit
  5. 6SN7 6.3 V heater supply
  6. 2C26 &E1148's
  7. First ECL82 amp probs.
  8. JE Labs ST2A3DX
  9. Punchy 813 Poweramp
  10. Hum in AE K502 or K12m
  11. SE 6SN7 amp....
  12. Audio Innovations 800C schematic or even better service manual?
  13. Music angel amps
  14. Low gain 9-pin tubes for Aikido?
  15. JADIS ORCHESTRA IN PCB (original is hardwire)
  16. Blown Valve in ARC VT50 - help
  17. LAMM ML3 *Signature*
  18. Diode for DC heater
  19. Calculating shunt reg source impedance
  20. Marant 7c preamp diyzone project
  21. PSU Caps for an EL34 SET
  22. high gain 12ax7 preamp from scratch?
  23. IXYS 10M45 chip CCS
  24. Octal Aikido? What tubes?
  25. Tube power supply questions
  26. 6J5 input swing
  27. Checking spice model plate curve accuracy
  28. How many Ohm for triode strapping?
  29. Power supply for Heathkit WA-P2 pre-amplifier
  30. Bogen MX-60a tune-up
  31. dynaco st35 clone problem
  32. Edcor OPT's
  33. ECC40 cascode
  34. Air Vane RIAA Tuning Question
  35. Tube Noob! need help with tubes lots of tubes
  36. bias adjust installation, bogen mo-100a mo 100a quicksilver
  37. 6EM7 Amp
  38. 40mu tube preamp suggestions?
  39. Safe installation of interstage
  40. I've built some amps, need suggestions for a DIY preamp or line stage
  41. CRD diode CCS any good <1mA?
  42. Help fixing a Border Patrol Power Amp
  43. TAD-60 schematics / mods
  44. Selling tube amps
  45. Drd 300b Pse
  46. Hammond Transformer Winding Resistance -- 369GX
  47. The meaning of VA in a TX
  48. Ucl85
  49. Best way to measure cathode follower current
  50. Neuman U47
  51. OT: Season's greetings to all
  52. Anyone have experience with a 6AN4...?
  53. L-pad instead of H-pad??
  54. valve regulated psu
  55. looking for metal enclosure for custom preamps
  56. basie+aikido preamp
  57. Input Switch?
  58. Help me please
  59. Congratulations, you just built a $2K antenna !
  60. Sonic Frontiers Line 2, please help?
  61. Sovtec 12AX7
  62. removing AC Hum on Aikido????
  63. Stereo Build - Mikaels KT88
  64. 6V6GT scematic, any good, comments?
  65. 807 vs 811A output: Sonic preference?
  66. Cheap PP OPTs
  67. Mc C-22 Ce
  68. Transformer Coupled Linestage
  69. 6CY7 Variants
  70. EZ81 rectifier noise
  71. Any good Output Transformers from China?
  72. Solid Core or Multistrand?
  73. Aikido - alive and kicking butt (not mine!)
  74. Dead Copland CTA-501
  75. Is the E86L the industrial sister of the EL86?
  76. Hammond 1630SEA, worth trying?
  77. Using Gas Regulators
  78. Cheap and Chinese KT88 SE amp
  79. Cary v12 -> V12r Conversion Questions
  80. 15 watts loud enough?
  81. ST70 hybrid finally up and running !!
  82. The Making of a Triode
  83. Spice models
  84. HV SS bench top power supply, advice needed
  85. A new Aikido is born - and kicking butt!
  86. Preamp - DIY vs Audio Research (or similar)
  87. Stromberg-Carlson 433 : Add standby or not?
  88. All-tube digital clock
  89. audible illusions dual mono preamp
  90. Siemens/Klangfim 6.4 mono question..?
  91. James 6123 OPT Wiring Help
  92. Next Bogen Conversion soon - need phase splitter advice
  93. A basic question regarding transformer laminations
  94. TOO many volts ????!!!!
  95. Dynaco Mark VI
  96. Frankenstein
  97. Unity buffer from 7-pin triode?
  98. Heathkit WA-P2 preamp
  99. Internal shield on 6922 dual triode
  100. 6cl3, 6cj3, 6dw4, 6ck3, 6ay3
  101. 418a
  102. Is it worth biasing with a distortion analyzer ???
  103. Usefulness of 6X8 tube?
  104. reducing hum in SET amps
  105. dynamic loadline
  106. Designing Transformer-Coupled Circuits...
  107. Tube-amp power issues
  108. SCA-35 Dynaco
  109. Q on voltage swing
  110. Buzz on preamp
  111. Help- I'm new!
  112. tube phono stage
  113. Schematic for Gm70!Where to find it!
  114. getting the specs on a transformer
  115. Nixie bargraph as a audio VU-meter
  116. Unique or odd uses for the diyAudio CCS boards
  117. Balanced tube preamp for class D power amps.
  118. 117v heater tube 117n7
  119. bypassing the plate-load
  120. Is this OK for a heater supply?
  121. which gauge wire for PSU????
  122. Citation II OPT?
  123. A new project, Blue Velvet Pre Amp is ready and rocks ! ! !
  124. Suggested budget pwr sply topologies?
  125. Battery for Cathode Voltage?
  126. Calbest help
  127. PO'ed at RFI
  128. 12B4-A Linestage
  129. Relay Attenuator for tube amp
  130. Aikido and K-1000 headphones?
  131. post poweramp power attenuator
  132. preamp tube for metal
  133. Favorite Output Tube?
  134. CCS Grid Bias
  135. Ring of two CCS for differential triode amp - stability?
  136. Unstacking a transformer...
  137. interconnect cable 15' long
  138. Citation II oscillating, Uh oh
  139. Regulated PowerSupply for Frank's 6SN7 Preamp
  140. Regulating G2 in Pentode Operation
  141. WE310A, a confusing issue
  142. Naming conventions
  143. Newbie: Powering up Tube Amp
  144. preference between 5842 and 6c45pi
  145. Help! first tube pre-amp with 12ax7
  146. S11E12 / 12E1: best operating point ?
  147. 6j5 trasformer coupled driver/splitter
  148. A new audio tube
  149. heretical unity gain OUTPUT stage...
  150. LL1630 Pre amp
  151. New Jensen caps has no bass in..Simple EL84PP
  152. EIMAC toobz : What sort of PSU ?
  153. Filament Transformer for 26 DHT
  154. Valve Pre for Chip Amp
  155. To hell with pride. I need help w. Grounded grid Pre-amp
  156. signal wiring / chassis grounding - Aikido
  157. Power rating for triode/pentode resistors
  158. Unity coupled power amp
  159. 6BX7 Outputs
  160. DIY Preamp for use with Dynaco ST70
  161. +B Power Supply Basics
  162. Tubes and their sweet spots.
  163. How to accomplish local feedback in pp amp ?
  164. Telefunken 5094
  165. Coupling caps size with grid choke?
  166. My first audio project
  167. Relationship Between Inductance And Current In Filter Choke
  168. Harmony H303A
  169. 6C4C - 6S4S - 6B4G op points?
  170. anyone mod a tube ultragain in here?
  171. EL84s glowing red
  172. Found a power transformer, what to do with it?
  173. Output section on preamp questions/breakdown.
  174. Transformer coupled 6AS7/6080
  175. Single Tube RIAA preamp too good to be true?
  176. What to make?
  177. LPT with low triodes?
  178. Ground questions
  179. Help! Upgrade a Music Angel KT88
  180. Need schematic for EL84 PSE
  181. Old OTL circuite question
  182. sub out in my 300b se? Help me please.
  183. Interstage OPT to drive 6V6 pp amplifier
  184. Voltage label on schematics...
  185. mystery purchase of the day
  186. What about the Eimac 3-500z?
  187. How much DC offset can a tube preamp take?
  188. Low voltage drop pass tube
  189. Convergent Legend Preamp
  190. vintage tube amp repair help
  191. Lasers, Tubes, and PCB
  192. 76 operating point/max plate rating?
  193. Mullard Made Tube Source Query
  194. SE Amp with NO HUM
  195. Frrank's 6Sn7 preamp...take out coupling cap??
  196. Need Schematic or help Newcomb AV-10 turntable tube amp
  197. Tube kits for beginners
  198. Lectron JH50 Tube Bias
  199. Tone circuit and other guitar amp Q's
  200. Removing LEDs from chinese amp
  201. Project madness
  202. chinese and tube Depot amps?
  203. eml 520 v2 info
  204. Gibson GA20 schematic needed
  205. Potted Transformer Enclosure Suppliers?
  206. Rogers Cadet III Phono Stage
  207. Modding Roberts/Akai mono block tube amps
  208. Full-wave bridge
  209. Output transformers and frequency response
  210. Class A2 SET using source follower driver
  211. Rectifier that drops lots of volts?
  212. switch snubber on preamp
  213. HV supply please comment before building
  214. This is cool
  215. Gold Lion KT88 Reissues
  216. 6F8G's any good?
  217. Matching capacitors
  218. Tung-Sol (new production) 6550s
  219. Curves, curves, and more curves
  220. Help for new design..
  221. OTL SE - Help Wanted with Idea
  222. OPTs causing crosstalk?
  223. KT88 Usable range
  224. How to change tubes ??? (NEWBIE)
  225. Do I need a Trafo for the HV in my 12AU7 (ECC82)?
  226. Need some help with potentiometer.
  227. Pinout of a UTC CG-422 power transformer
  228. Simple EL34 SET; advice?
  229. Popping Noise = Clipping ?
  230. PSU for an 813 SE
  231. Single Stage Line Amp (Diff Amp) Tube?
  232. EL 84 Edicron UK vs JJ
  233. calculating HF rolloff at 20kHz from input impedance
  234. Need info on RCA 813 used in Tube Amp
  235. Baby Huey: shunt feedback doesn't work to me
  236. Audio Innovations 800mkiii output trans needed
  237. High voltage psu
  238. First tubeamp, dont laugh too hard
  239. Newbie building d3A DRD 300B
  240. small practice amp with master volume
  241. Looking for informations on Marconi TF2331 Distortion Factor Analyser
  242. gu81m
  243. 6sc7 vs. 6su7 in LTPI duty
  244. Cascode with ECC81(12AT7)=>Morgan Jones
  245. Where can I find these?
  246. Kofi Annan in: "Seven-Pound Mono Amp"
  247. Kofi Annan in: "Surf Bassin'"
  248. McIntosh Re-cap Questions
  249. 5881
  250. Cary Audio V12 - Schematic - Needed

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