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  1. Regulated PowerSupply for Frank's 6SN7 Preamp
  2. Regulating G2 in Pentode Operation
  3. WE310A, a confusing issue
  4. Naming conventions
  5. Newbie: Powering up Tube Amp
  6. preference between 5842 and 6c45pi
  7. Help! first tube pre-amp with 12ax7
  8. S11E12 / 12E1: best operating point ?
  9. 6j5 trasformer coupled driver/splitter
  10. A new audio tube
  11. heretical unity gain OUTPUT stage...
  12. LL1630 Pre amp
  13. EIMAC toobz : What sort of PSU ?
  14. Filament Transformer for 26 DHT
  15. Valve Pre for Chip Amp
  16. To hell with pride. I need help w. Grounded grid Pre-amp
  17. signal wiring / chassis grounding - Aikido
  18. Power rating for triode/pentode resistors
  19. Unity coupled power amp
  20. 6BX7 Outputs
  21. DIY Preamp for use with Dynaco ST70
  22. +B Power Supply Basics
  23. Tubes and their sweet spots.
  24. How to accomplish local feedback in pp amp ?
  25. Telefunken 5094
  26. Coupling caps size with grid choke?
  27. My first audio project
  28. Relationship Between Inductance And Current In Filter Choke
  29. Harmony H303A
  30. 6C4C - 6S4S - 6B4G op points?
  31. anyone mod a tube ultragain in here?
  32. EL84s glowing red
  33. Found a power transformer, what to do with it?
  34. Output section on preamp questions/breakdown.
  35. Transformer coupled 6AS7/6080
  36. Single Tube RIAA preamp too good to be true?
  37. What to make?
  38. LPT with low triodes?
  39. Ground questions
  40. Help! Upgrade a Music Angel KT88
  41. Need schematic for EL84 PSE
  42. Old OTL circuite question
  43. sub out in my 300b se? Help me please.
  44. Interstage OPT to drive 6V6 pp amplifier
  45. Voltage label on schematics...
  46. mystery purchase of the day
  47. What about the Eimac 3-500z?
  48. How much DC offset can a tube preamp take?
  49. Low voltage drop pass tube
  50. Convergent Legend Preamp
  51. vintage tube amp repair help
  52. Lasers, Tubes, and PCB
  53. 76 operating point/max plate rating?
  54. Mullard Made Tube Source Query
  55. SE Amp with NO HUM
  56. Frrank's 6Sn7 preamp...take out coupling cap??
  57. Need Schematic or help Newcomb AV-10 turntable tube amp
  58. Tube kits for beginners
  59. Lectron JH50 Tube Bias
  60. Removing LEDs from chinese amp
  61. Project madness
  62. chinese and tube Depot amps?
  63. eml 520 v2 info
  64. Rogers Cadet III Phono Stage
  65. Modding Roberts/Akai mono block tube amps
  66. Full-wave bridge
  67. Output transformers and frequency response
  68. Class A2 SET using source follower driver
  69. Rectifier that drops lots of volts?
  70. switch snubber on preamp
  71. HV supply please comment before building
  72. This is cool
  73. Gold Lion KT88 Reissues
  74. 6F8G's any good?
  75. Tung-Sol (new production) 6550s
  76. Curves, curves, and more curves
  77. Help for new design..
  78. OTL SE - Help Wanted with Idea
  79. OPTs causing crosstalk?
  80. KT88 Usable range
  81. How to change tubes ??? (NEWBIE)
  82. Do I need a Trafo for the HV in my 12AU7 (ECC82)?
  83. Need some help with potentiometer.
  84. Pinout of a UTC CG-422 power transformer
  85. Simple EL34 SET; advice?
  86. Popping Noise = Clipping ?
  87. PSU for an 813 SE
  88. Single Stage Line Amp (Diff Amp) Tube?
  89. EL 84 Edicron UK vs JJ
  90. calculating HF rolloff at 20kHz from input impedance
  91. Need info on RCA 813 used in Tube Amp
  92. Baby Huey: shunt feedback doesn't work to me
  93. Audio Innovations 800mkiii output trans needed
  94. High voltage psu
  95. First tubeamp, dont laugh too hard
  96. Newbie building d3A DRD 300B
  97. small practice amp with master volume
  98. Looking for informations on Marconi TF2331 Distortion Factor Analyser
  99. gu81m
  100. 6sc7 vs. 6su7 in LTPI duty
  101. Cascode with ECC81(12AT7)=>Morgan Jones
  102. Where can I find these?
  103. Kofi Annan in: "Seven-Pound Mono Amp"
  104. Kofi Annan in: "Surf Bassin'"
  105. McIntosh Re-cap Questions
  106. 5881
  107. Cary Audio V12 - Schematic - Needed
  108. Anyone tried this method for OTL?
  109. Can't simulate 12AX7 with multisim 7
  110. new member, and some Electrohome PA100Mk1's
  111. Edcor Interstage for Phase Splitter?
  112. Why isodyne splitters not popular...
  113. Low Voltage phono stage for newbies
  114. 6EJ7 or 6EH7 triode strapped?
  115. New Guy
  116. Counterpoint SA20 Mosfet output rail voltage
  117. Silly Chassis Punch Question...
  118. Tube Noob question
  119. tube shop in the uk
  120. Choke question
  121. Self Bias and Fixed Bias for Big Tubes?
  122. Stromberg Carlson ASR433 Question
  123. CCS better in plate or cathode
  124. Audiophile term: "HIP test"
  125. Advice needed for tweaking S5 Electronics K-12G diy kit
  126. TV Damper Diodes
  127. 813 SE circuit,will it work?
  128. Looking for tube for application
  129. Finger joints vs. screw and glue
  130. 2C36 plate curve
  131. EL34 as preamp
  132. with DHT rectifiers, is the "+" side of the power supply...
  133. Paging Unison845
  134. Quad II - Forty
  135. my amplifiers
  136. Cheap spud amp
  137. Interesting 6L6GC Test Report
  138. 4D32 SE amplifier... help!
  139. 6AS7G with grid current?
  140. bypass switch for preamp
  141. Grounded Grid vs. Aikido
  142. how to connect an EL34 pentode into a triode and 100ohm resistor between plate and g2
  143. Could this work? (PP amp with CCS)
  144. about newbies...and textbook..
  145. NFB capacitor to screen tap on ST-70 ?
  146. Aikido question
  147. Help with amp #2, 300B or 6550?
  148. Russian 807
  149. Searching Sound Valves M40 Monoblocks schematic
  150. Make: Bell P/A - Model: Carillon '35'
  151. Octal tubes for 7695-style matrix amp?
  152. SET recommendations
  153. Dynaco ST35
  154. Scott LK-72A is ALIVE
  155. 5687 as a single stage SE amp
  156. Changing two stereo amps into two monos
  157. UL Feedback Tap Calculation
  158. Octal pentode sub for ef86?
  159. to mach1: tubecad regulator using tl431
  160. Thermal management: it this not really of concern?
  161. Signal phase shift through a tube amp
  162. Common-mode EI PS Chokes
  163. Signal pentode in current production
  164. Pentode vs Ultralinear
  165. Bogen CHA33/CHA33Y
  166. Sheet Metal Gauge
  167. Help with 6N6p
  168. Can anyone help, identifing selenium bridge hookup please.
  169. E182CC substitution ?
  170. Face Plate Printing and Silk Screening
  171. Funky reading 12B4A?
  172. Sovtek 5Y3 Issues
  173. from lilliput to gargantua (just for fun)
  174. Formula for calculating HT voltage?
  175. DIY Headamp for Sennheiser-650?
  176. Nuera Tube Amps
  177. Amplifier identification
  178. Perfect tube regulator
  179. Value of grid leak resistor
  180. Comments on this circuit
  181. Just grabbed this AF mesuring equipement, Any infos before restauration is Welcome
  182. Heater current monitoring...
  183. on-off switch position in PSU
  184. A better LDO heater regulator
  185. any feedback on Russian gas regulators like SG4S and etc.?
  186. Some cathode follower questions
  187. Anyone please explain"What is an A1,A2 in SE amp?
  188. What is the correct plate voltage in this circuit?
  189. Any1 have an Osmond PCB library for tubes?
  190. best type cap for preamp PSU
  191. Steve Bench PP loadlines
  192. Spice Error
  193. Anyone have a Welborne Labs amp?
  194. Please help out a Noobie...
  195. wellborne labs
  196. best schematic designer for tubes?
  197. hum in 1 channel
  198. B+ time delay relay
  199. something is wrong with the shunt regulator
  200. Suggestions for a high end tube amp kit
  201. Conrad Johnson PV 7 problem
  202. Math to calc optimal voltage of tube dac to match amp input sensitivity?
  203. Please help: no sound and blown fuse
  204. sparking Output transformer In Webcor 14x240 Amp
  205. Designing my very first tube amp...
  206. Diode bridge for Valve Buffered GC
  207. 6S41S (6C41C) Amplifier
  208. audio research sp11 upgrade help please
  209. The good, the bad, and the ugly OTL amplifiers
  210. Z2b tube rectifier
  211. Sparks inside GZ34
  212. Help with EV4417 6cm5/EL36
  213. My Cornet2 Tube Phono Preamp
  214. bright switch to bias circuit?
  215. Regulated AC...thought some of you might be interested
  216. Aikido PSU - integrated or standalone???
  217. Frank Philipse's tube site
  218. World' smallest GM-70 set
  219. Question on output hum on tube amp?
  220. Aikido Preamp
  221. Argh!!
  222. EL84 bias point
  223. Coupling cap rating
  224. outstanding book??
  225. when the datasheet says "vertical mounting: up or down", does it mean...
  226. Did I get in over my head too soon?!?
  227. Parallel output tubes
  228. Dropping filament volts/ L-W ramblings
  229. Rogers Cadet III Power problem ?
  230. about bi-cap
  231. HOT Iron ?
  232. how to set current in G Pimm's latest self-biasing CCS circuit?
  233. Low pass active tube crossover
  234. Ecological recycling amplifier (6CU6)
  235. Need ECF80 / 6BL8 tube spice 3f4 model
  236. Capacitor above chassis
  237. Bogen-Stein! mx60a mx-60a mo100a mo-100a
  238. Transmitter tubes
  239. what are the advantages of double core output transformers vs EI ?
  240. What is a reasonable amount ripple voltage for a 300B?
  241. "Old Like" sound transformer with a Tube !
  242. I coined the phrase HIGH VIVIDITY, to differentiate our amps from High Fidelity ones
  243. P-P resistance oddity
  244. Tube preamp vs. solid state
  245. 6l6 penthode triode
  246. Rising hum when turntable is plugged into preamp ??
  247. 6SL7 or 6SL7GT for broken Tubalizer
  248. Aikido PCB and AC filaments.
  249. Help with 300b proyect.
  250. 6P14P Amp Scratch Build

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