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  1. Hum in AE K502 or K12m
  2. SE 6SN7 amp....
  3. Audio Innovations 800C schematic or even better service manual?
  4. Music angel amps
  5. Low gain 9-pin tubes for Aikido?
  6. JADIS ORCHESTRA IN PCB (original is hardwire)
  7. Blown Valve in ARC VT50 - help
  8. LAMM ML3 *Signature*
  9. Diode for DC heater
  10. Calculating shunt reg source impedance
  11. Marant 7c preamp diyzone project
  12. PSU Caps for an EL34 SET
  13. high gain 12ax7 preamp from scratch?
  14. IXYS 10M45 chip CCS
  15. Octal Aikido? What tubes?
  16. Tube power supply questions
  17. 6J5 input swing
  18. Checking spice model plate curve accuracy
  19. How many Ohm for triode strapping?
  20. Power supply for Heathkit WA-P2 pre-amplifier
  21. Bogen MX-60a tune-up
  22. dynaco st35 clone problem
  23. Edcor OPT's
  24. ECC40 cascode
  25. Air Vane RIAA Tuning Question
  26. Tube Noob! need help with tubes lots of tubes
  27. bias adjust installation, bogen mo-100a mo 100a quicksilver
  28. 6EM7 Amp
  29. 40mu tube preamp suggestions?
  30. Safe installation of interstage
  31. I've built some amps, need suggestions for a DIY preamp or line stage
  32. CRD diode CCS any good <1mA?
  33. Help fixing a Border Patrol Power Amp
  34. TAD-60 schematics / mods
  35. Selling tube amps
  36. Drd 300b Pse
  37. Hammond Transformer Winding Resistance -- 369GX
  38. The meaning of VA in a TX
  39. Ucl85
  40. Best way to measure cathode follower current
  41. Neuman U47
  42. OT: Season's greetings to all
  43. Anyone have experience with a 6AN4...?
  44. L-pad instead of H-pad??
  45. valve regulated psu
  46. looking for metal enclosure for custom preamps
  47. basie+aikido preamp
  48. Input Switch?
  49. Help me please
  50. Congratulations, you just built a $2K antenna !
  51. Sonic Frontiers Line 2, please help?
  52. Sovtec 12AX7
  53. removing AC Hum on Aikido????
  54. Stereo Build - Mikaels KT88
  55. 6V6GT scematic, any good, comments?
  56. 807 vs 811A output: Sonic preference?
  57. Cheap PP OPTs
  58. Mc C-22 Ce
  59. Transformer Coupled Linestage
  60. 6CY7 Variants
  61. EZ81 rectifier noise
  62. Any good Output Transformers from China?
  63. Solid Core or Multistrand?
  64. Aikido - alive and kicking butt (not mine!)
  65. Dead Copland CTA-501
  66. Is the E86L the industrial sister of the EL86?
  67. Hammond 1630SEA, worth trying?
  68. Using Gas Regulators
  69. Cheap and Chinese KT88 SE amp
  70. Cary v12 -> V12r Conversion Questions
  71. 15 watts loud enough?
  72. ST70 hybrid finally up and running !!
  73. The Making of a Triode
  74. Spice models
  75. HV SS bench top power supply, advice needed
  76. A new Aikido is born - and kicking butt!
  77. Preamp - DIY vs Audio Research (or similar)
  78. Stromberg-Carlson 433 : Add standby or not?
  79. All-tube digital clock
  80. audible illusions dual mono preamp
  81. Siemens/Klangfim 6.4 mono question..?
  82. James 6123 OPT Wiring Help
  83. Next Bogen Conversion soon - need phase splitter advice
  84. A basic question regarding transformer laminations
  85. TOO many volts ????!!!!
  86. Dynaco Mark VI
  87. Frankenstein
  88. Unity buffer from 7-pin triode?
  89. Heathkit WA-P2 preamp
  90. Internal shield on 6922 dual triode
  91. 6cl3, 6cj3, 6dw4, 6ck3, 6ay3
  92. 418a
  93. Is it worth biasing with a distortion analyzer ???
  94. Usefulness of 6X8 tube?
  95. reducing hum in SET amps
  96. dynamic loadline
  97. Designing Transformer-Coupled Circuits...
  98. Tube-amp power issues
  99. SCA-35 Dynaco
  100. Q on voltage swing
  101. Buzz on preamp
  102. Help- I'm new!
  103. tube phono stage
  104. Schematic for Gm70!Where to find it!
  105. getting the specs on a transformer
  106. Nixie bargraph as a audio VU-meter
  107. Unique or odd uses for the diyAudio CCS boards
  108. Balanced tube preamp for class D power amps.
  109. 117v heater tube 117n7
  110. bypassing the plate-load
  111. Is this OK for a heater supply?
  112. which gauge wire for PSU????
  113. Citation II OPT?
  114. A new project, Blue Velvet Pre Amp is ready and rocks ! ! !
  115. Suggested budget pwr sply topologies?
  116. Battery for Cathode Voltage?
  117. Calbest help
  118. PO'ed at RFI
  119. 12B4-A Linestage
  120. Relay Attenuator for tube amp
  121. Aikido and K-1000 headphones?
  122. post poweramp power attenuator
  123. preamp tube for metal
  124. Favorite Output Tube?
  125. CCS Grid Bias
  126. Ring of two CCS for differential triode amp - stability?
  127. Unstacking a transformer...
  128. interconnect cable 15' long
  129. Citation II oscillating, Uh oh
  130. Regulated PowerSupply for Frank's 6SN7 Preamp
  131. Regulating G2 in Pentode Operation
  132. WE310A, a confusing issue
  133. Naming conventions
  134. Newbie: Powering up Tube Amp
  135. preference between 5842 and 6c45pi
  136. Help! first tube pre-amp with 12ax7
  137. S11E12 / 12E1: best operating point ?
  138. 6j5 trasformer coupled driver/splitter
  139. A new audio tube
  140. heretical unity gain OUTPUT stage...
  141. LL1630 Pre amp
  142. New Jensen caps has no bass in..Simple EL84PP
  143. EIMAC toobz : What sort of PSU ?
  144. Filament Transformer for 26 DHT
  145. Valve Pre for Chip Amp
  146. To hell with pride. I need help w. Grounded grid Pre-amp
  147. signal wiring / chassis grounding - Aikido
  148. Power rating for triode/pentode resistors
  149. Unity coupled power amp
  150. 6BX7 Outputs
  151. DIY Preamp for use with Dynaco ST70
  152. +B Power Supply Basics
  153. Tubes and their sweet spots.
  154. How to accomplish local feedback in pp amp ?
  155. Telefunken 5094
  156. Coupling caps size with grid choke?
  157. My first audio project
  158. Relationship Between Inductance And Current In Filter Choke
  159. Harmony H303A
  160. 6C4C - 6S4S - 6B4G op points?
  161. anyone mod a tube ultragain in here?
  162. EL84s glowing red
  163. Found a power transformer, what to do with it?
  164. Output section on preamp questions/breakdown.
  165. Transformer coupled 6AS7/6080
  166. Single Tube RIAA preamp too good to be true?
  167. What to make?
  168. LPT with low triodes?
  169. Ground questions
  170. Help! Upgrade a Music Angel KT88
  171. Need schematic for EL84 PSE
  172. Old OTL circuite question
  173. sub out in my 300b se? Help me please.
  174. Interstage OPT to drive 6V6 pp amplifier
  175. Voltage label on schematics...
  176. mystery purchase of the day
  177. What about the Eimac 3-500z?
  178. How much DC offset can a tube preamp take?
  179. Low voltage drop pass tube
  180. Convergent Legend Preamp
  181. vintage tube amp repair help
  182. Lasers, Tubes, and PCB
  183. 76 operating point/max plate rating?
  184. Mullard Made Tube Source Query
  185. SE Amp with NO HUM
  186. Frrank's 6Sn7 preamp...take out coupling cap??
  187. Need Schematic or help Newcomb AV-10 turntable tube amp
  188. Tube kits for beginners
  189. Lectron JH50 Tube Bias
  190. Tone circuit and other guitar amp Q's
  191. Removing LEDs from chinese amp
  192. Project madness
  193. chinese and tube Depot amps?
  194. eml 520 v2 info
  195. Gibson GA20 schematic needed
  196. Potted Transformer Enclosure Suppliers?
  197. Rogers Cadet III Phono Stage
  198. Modding Roberts/Akai mono block tube amps
  199. Full-wave bridge
  200. Output transformers and frequency response
  201. Class A2 SET using source follower driver
  202. Rectifier that drops lots of volts?
  203. switch snubber on preamp
  204. HV supply please comment before building
  205. This is cool
  206. Gold Lion KT88 Reissues
  207. 6F8G's any good?
  208. Matching capacitors
  209. Tung-Sol (new production) 6550s
  210. Curves, curves, and more curves
  211. Help for new design..
  212. OTL SE - Help Wanted with Idea
  213. OPTs causing crosstalk?
  214. KT88 Usable range
  215. How to change tubes ??? (NEWBIE)
  216. Do I need a Trafo for the HV in my 12AU7 (ECC82)?
  217. Need some help with potentiometer.
  218. Pinout of a UTC CG-422 power transformer
  219. Simple EL34 SET; advice?
  220. Popping Noise = Clipping ?
  221. PSU for an 813 SE
  222. Single Stage Line Amp (Diff Amp) Tube?
  223. EL 84 Edicron UK vs JJ
  224. calculating HF rolloff at 20kHz from input impedance
  225. Need info on RCA 813 used in Tube Amp
  226. Baby Huey: shunt feedback doesn't work to me
  227. Audio Innovations 800mkiii output trans needed
  228. High voltage psu
  229. First tubeamp, dont laugh too hard
  230. Newbie building d3A DRD 300B
  231. small practice amp with master volume
  232. Looking for informations on Marconi TF2331 Distortion Factor Analyser
  233. gu81m
  234. 6sc7 vs. 6su7 in LTPI duty
  235. Cascode with ECC81(12AT7)=>Morgan Jones
  236. Where can I find these?
  237. Kofi Annan in: "Seven-Pound Mono Amp"
  238. Kofi Annan in: "Surf Bassin'"
  239. McIntosh Re-cap Questions
  240. 5881
  241. Cary Audio V12 - Schematic - Needed
  242. Anyone tried this method for OTL?
  243. Can't simulate 12AX7 with multisim 7
  244. new member, and some Electrohome PA100Mk1's
  245. Edcor Interstage for Phase Splitter?
  246. Why isodyne splitters not popular...
  247. Low Voltage phono stage for newbies
  248. 6EJ7 or 6EH7 triode strapped?
  249. New Guy
  250. Building a Fender 5E3 Deluxe from scratch.

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