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

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