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  1. 6EM7 Amp
  2. 40mu tube preamp suggestions?
  3. Safe installation of interstage
  4. I've built some amps, need suggestions for a DIY preamp or line stage
  5. CRD diode CCS any good <1mA?
  6. Help fixing a Border Patrol Power Amp
  7. TAD-60 schematics / mods
  8. Selling tube amps
  9. Drd 300b Pse
  10. Hammond Transformer Winding Resistance -- 369GX
  11. The meaning of VA in a TX
  12. Ucl85
  13. Best way to measure cathode follower current
  14. Neuman U47
  15. OT: Season's greetings to all
  16. Anyone have experience with a 6AN4...?
  17. L-pad instead of H-pad??
  18. valve regulated psu
  19. basie+aikido preamp
  20. Input Switch?
  21. Help me please
  22. Congratulations, you just built a $2K antenna !
  23. Sonic Frontiers Line 2, please help?
  24. Sovtec 12AX7
  25. removing AC Hum on Aikido????
  26. Stereo Build - Mikaels KT88
  27. 6V6GT scematic, any good, comments?
  28. 807 vs 811A output: Sonic preference?
  29. Cheap PP OPTs
  30. Mc C-22 Ce
  31. Transformer Coupled Linestage
  32. 6CY7 Variants
  33. EZ81 rectifier noise
  34. Any good Output Transformers from China?
  35. Aikido - alive and kicking butt (not mine!)
  36. Dead Copland CTA-501
  37. Is the E86L the industrial sister of the EL86?
  38. Hammond 1630SEA, worth trying?
  39. Using Gas Regulators
  40. Cheap and Chinese KT88 SE amp
  41. Cary v12 -> V12r Conversion Questions
  42. 15 watts loud enough?
  43. ST70 hybrid finally up and running !!
  44. The Making of a Triode
  45. Spice models
  46. HV SS bench top power supply, advice needed
  47. A new Aikido is born - and kicking butt!
  48. Preamp - DIY vs Audio Research (or similar)
  49. Stromberg-Carlson 433 : Add standby or not?
  50. All-tube digital clock
  51. audible illusions dual mono preamp
  52. Siemens/Klangfim 6.4 mono question..?
  53. James 6123 OPT Wiring Help
  54. Next Bogen Conversion soon - need phase splitter advice
  55. A basic question regarding transformer laminations
  56. TOO many volts ????!!!!
  57. Dynaco Mark VI
  58. Frankenstein
  59. Unity buffer from 7-pin triode?
  60. Heathkit WA-P2 preamp
  61. Internal shield on 6922 dual triode
  62. 6cl3, 6cj3, 6dw4, 6ck3, 6ay3
  63. 418a
  64. Is it worth biasing with a distortion analyzer ???
  65. Usefulness of 6X8 tube?
  66. reducing hum in SET amps
  67. dynamic loadline
  68. Designing Transformer-Coupled Circuits...
  69. Tube-amp power issues
  70. SCA-35 Dynaco
  71. Q on voltage swing
  72. Buzz on preamp
  73. Help- I'm new!
  74. tube phono stage
  75. Schematic for Gm70!Where to find it!
  76. getting the specs on a transformer
  77. Nixie bargraph as a audio VU-meter
  78. Unique or odd uses for the diyAudio CCS boards
  79. Balanced tube preamp for class D power amps.
  80. 117v heater tube 117n7
  81. bypassing the plate-load
  82. Is this OK for a heater supply?
  83. which gauge wire for PSU????
  84. Citation II OPT?
  85. A new project, Blue Velvet Pre Amp is ready and rocks ! ! !
  86. Suggested budget pwr sply topologies?
  87. Battery for Cathode Voltage?
  88. PO'ed at RFI
  89. 12B4-A Linestage
  90. Relay Attenuator for tube amp
  91. Aikido and K-1000 headphones?
  92. post poweramp power attenuator
  93. preamp tube for metal
  94. Favorite Output Tube?
  95. CCS Grid Bias
  96. Ring of two CCS for differential triode amp - stability?
  97. Unstacking a transformer...
  98. interconnect cable 15' long
  99. Citation II oscillating, Uh oh
  100. Regulated PowerSupply for Frank's 6SN7 Preamp
  101. Regulating G2 in Pentode Operation
  102. WE310A, a confusing issue
  103. Naming conventions
  104. Newbie: Powering up Tube Amp
  105. preference between 5842 and 6c45pi
  106. Help! first tube pre-amp with 12ax7
  107. S11E12 / 12E1: best operating point ?
  108. 6j5 trasformer coupled driver/splitter
  109. A new audio tube
  110. heretical unity gain OUTPUT stage...
  111. LL1630 Pre amp
  112. EIMAC toobz : What sort of PSU ?
  113. Filament Transformer for 26 DHT
  114. Valve Pre for Chip Amp
  115. To hell with pride. I need help w. Grounded grid Pre-amp
  116. signal wiring / chassis grounding - Aikido
  117. Power rating for triode/pentode resistors
  118. Unity coupled power amp
  119. 6BX7 Outputs
  120. DIY Preamp for use with Dynaco ST70
  121. +B Power Supply Basics
  122. Tubes and their sweet spots.
  123. How to accomplish local feedback in pp amp ?
  124. Telefunken 5094
  125. Coupling caps size with grid choke?
  126. My first audio project
  127. Relationship Between Inductance And Current In Filter Choke
  128. Harmony H303A
  129. 6C4C - 6S4S - 6B4G op points?
  130. anyone mod a tube ultragain in here?
  131. EL84s glowing red
  132. Found a power transformer, what to do with it?
  133. Output section on preamp questions/breakdown.
  134. Transformer coupled 6AS7/6080
  135. Single Tube RIAA preamp too good to be true?
  136. What to make?
  137. LPT with low triodes?
  138. Ground questions
  139. Help! Upgrade a Music Angel KT88
  140. Need schematic for EL84 PSE
  141. Old OTL circuite question
  142. sub out in my 300b se? Help me please.
  143. Interstage OPT to drive 6V6 pp amplifier
  144. Voltage label on schematics...
  145. mystery purchase of the day
  146. What about the Eimac 3-500z?
  147. How much DC offset can a tube preamp take?
  148. Low voltage drop pass tube
  149. Convergent Legend Preamp
  150. vintage tube amp repair help
  151. Lasers, Tubes, and PCB
  152. 76 operating point/max plate rating?
  153. Mullard Made Tube Source Query
  154. SE Amp with NO HUM
  155. Frrank's 6Sn7 preamp...take out coupling cap??
  156. Need Schematic or help Newcomb AV-10 turntable tube amp
  157. Tube kits for beginners
  158. Lectron JH50 Tube Bias
  159. Removing LEDs from chinese amp
  160. Project madness
  161. chinese and tube Depot amps?
  162. eml 520 v2 info
  163. Rogers Cadet III Phono Stage
  164. Modding Roberts/Akai mono block tube amps
  165. Full-wave bridge
  166. Output transformers and frequency response
  167. Class A2 SET using source follower driver
  168. Rectifier that drops lots of volts?
  169. switch snubber on preamp
  170. HV supply please comment before building
  171. This is cool
  172. Gold Lion KT88 Reissues
  173. 6F8G's any good?
  174. Tung-Sol (new production) 6550s
  175. Curves, curves, and more curves
  176. Help for new design..
  177. OTL SE - Help Wanted with Idea
  178. OPTs causing crosstalk?
  179. KT88 Usable range
  180. How to change tubes ??? (NEWBIE)
  181. Do I need a Trafo for the HV in my 12AU7 (ECC82)?
  182. Need some help with potentiometer.
  183. Pinout of a UTC CG-422 power transformer
  184. Simple EL34 SET; advice?
  185. Popping Noise = Clipping ?
  186. PSU for an 813 SE
  187. Single Stage Line Amp (Diff Amp) Tube?
  188. EL 84 Edicron UK vs JJ
  189. calculating HF rolloff at 20kHz from input impedance
  190. Need info on RCA 813 used in Tube Amp
  191. Baby Huey: shunt feedback doesn't work to me
  192. Audio Innovations 800mkiii output trans needed
  193. High voltage psu
  194. First tubeamp, dont laugh too hard
  195. Newbie building d3A DRD 300B
  196. small practice amp with master volume
  197. Looking for informations on Marconi TF2331 Distortion Factor Analyser
  198. gu81m
  199. 6sc7 vs. 6su7 in LTPI duty
  200. Cascode with ECC81(12AT7)=>Morgan Jones
  201. Where can I find these?
  202. Kofi Annan in: "Seven-Pound Mono Amp"
  203. Kofi Annan in: "Surf Bassin'"
  204. McIntosh Re-cap Questions
  205. 5881
  206. Cary Audio V12 - Schematic - Needed
  207. Anyone tried this method for OTL?
  208. Can't simulate 12AX7 with multisim 7
  209. new member, and some Electrohome PA100Mk1's
  210. Edcor Interstage for Phase Splitter?
  211. Why isodyne splitters not popular...
  212. Low Voltage phono stage for newbies
  213. 6EJ7 or 6EH7 triode strapped?
  214. New Guy
  215. Counterpoint SA20 Mosfet output rail voltage
  216. Silly Chassis Punch Question...
  217. Tube Noob question
  218. tube shop in the uk
  219. Choke question
  220. Self Bias and Fixed Bias for Big Tubes?
  221. Stromberg Carlson ASR433 Question
  222. CCS better in plate or cathode
  223. Audiophile term: &quot;HIP test&quot;
  224. Advice needed for tweaking S5 Electronics K-12G diy kit
  225. TV Damper Diodes
  226. 813 SE circuit,will it work?
  227. Looking for tube for application
  228. Finger joints vs. screw and glue
  229. 2C36 plate curve
  230. EL34 as preamp
  231. with DHT rectifiers, is the "+" side of the power supply...
  232. Paging Unison845
  233. Quad II - Forty
  234. my amplifiers
  235. Cheap spud amp
  236. Interesting 6L6GC Test Report
  237. 4D32 SE amplifier... help!
  238. 6AS7G with grid current?
  239. bypass switch for preamp
  240. Grounded Grid vs. Aikido
  241. how to connect an EL34 pentode into a triode and 100ohm resistor between plate and g2
  242. Could this work? (PP amp with CCS)
  243. about newbies...and textbook..
  244. NFB capacitor to screen tap on ST-70 ?
  245. Aikido question
  246. Help with amp #2, 300B or 6550?
  247. Russian 807
  248. Searching Sound Valves M40 Monoblocks schematic
  249. Make: Bell P/A - Model: Carillon '35'
  250. Octal tubes for 7695-style matrix amp?

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