PDA

View Full Version : Tubes / Valves


Pages : 1 2 3 4 5 6 7 8 9 10 11 12 13 [14] 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104

  1. Some help with PCL86 Headphone amp Project
  2. Top (sound) quality valve phono stage
  3. Calculating cathode follower using 12AU7 for 90V supply
  4. Cathode resistor
  5. Help with an old Capitol
  6. Cathode bypass cap
  7. balanced post-OT line output?
  8. Blown SE mono, troubleshoot
  9. What is this circuit for?
  10. Siemens EL 86 NOS?
  11. Valve Operational Amplifiers
  12. What will be the best drive to 211 tube?
  13. Dual 845 SE A2 questions
  14. Harman Kardon Citation I, II, & III (Special thanks to Jim McShane and Eli Duttman!)
  15. Heater rewiring from 6N2 to 12AX7 with 6.3VAC
  16. heater bias value
  17. the hum or is it a siliconray kit
  18. DC Automatic Bias Control - Auto fixed bias
  19. What makes an OT a good OT for audiophile and need suggestion.
  20. The totally capless DHT SET amp - 300B or others
  21. Angled Socket brackets?
  22. Octal or loctal tubes as cathode follower?
  23. Used int amp please help to figured out?
  24. Rod Coleman heat sink question
  25. Tubelab SE + Fostex fe206en vs room size! suggestions needed please!
  26. ef86 pentode/triode switch: voltage rating?
  27. Input to pre-amp
  28. EML 300B
  29. Need suggestion in building a stereo power amp
  30. VALVO EL84 and ECC83 TELEFUNKEN ID?
  31. Bogen E-75 tube amp
  32. Quad II amplifier needed for parts
  33. Low voltage 6N1P RIAA?
  34. Does anybody collect vacuum tube ADV
  35. HDMI connection causes hum on Quad 303
  36. ECC81/12AT7 "sweet spot"
  37. Phono Preamp Hum
  38. Benefits of high voltage source for preamp
  39. Auto Bias
  40. Thomas Mayer Sound Processor pics
  41. Have you used the 15A6 pentode as an audio output tube ?
  42. Can I use a 5 volts tap for 6SN7 heaters?
  43. Any opinions about this tube amp kit ?
  44. 300B odd behaviour
  45. Aikido starter help requested
  46. 10Y FILAMENT VOLTAGE MARGIN
  47. Wiring a multitap transformer. Help needed
  48. A directly heated pentode folded cascode
  49. Zener Power Supply Clamp
  50. SPICE Simulator Giving Negative Gain
  51. SE 811 amp schematic...
  52. Philco Labled 12AU7A black-plate 45' halo getter- Raytheon??
  53. My FrankenAmp
  54. Panel Meter Install
  55. New Amp With Hum...
  56. EF184-6j51p Load by CCS or Resitor
  57. Slew rate.. Something doesn't make sense to me.
  58. HK Citation V question
  59. Modifying a tube regulator
  60. 6BG6 Push Pull Parallel Amp Build
  61. adapting a FU32 Tube amp for QQE 03/20 tubes?
  62. audio innovations 500 one channel down?
  63. Questions about found Mullard xf1's
  64. SE 6BL7
  65. Sound Valves M60 schematics needed
  66. el34 class a mod advice please
  67. 12AU7 Genuine or remarked
  68. MIT, Triode amp cathode resistor load line
  69. Marry tube preamplifier with 2-Band Wien bridge equalizer
  70. Oddball tube question
  71. 6H2n-EB Strange Codes??
  72. Triode Dick's KT88 PP Amp.
  73. Curves to EL 502 and EL 300
  74. Input level 1/2 ECC83 + EL84
  75. Cincinatti Mac Amps
  76. ss rectifier filter recommendate
  77. Determining plate current with non-standard screen grid voltages
  78. allnic hpa-5000
  79. Hodgepodge build
  80. Power Transformer weirdness/wiring problem
  81. Question trafo for Broskie Janus PSU
  82. Copland CVA-306 tube and output capacitor replacement
  83. Choice of Output Transformer
  84. Jumping in with both feet
  85. Large 9pin socket needed
  86. Line-up of old and currently produced RIAA Stages with tubes wanted (like EAR-834)
  87. Question about 6P31S
  88. 6N16B Aikido Cathode Resistors
  89. 1KV umbilical cords.... and other HV issues
  90. 300b Bewitch Amp Blows Fuses
  91. Dynaco ST-70
  92. Front-end topologies for PP
  93. tranformers
  94. How many LesBox units exist out there?
  95. Old Sylvania black-plate bent getter 12au7s
  96. Phono / pre amp section schematic suggestions
  97. 4P1L in parallel Single Ended
  98. Pair of Ampex 620 amps
  99. My SE 6S4S
  100. chinese ebay 12au7 + 6dj8 white cathode follower preamp boards?
  101. "chirp" when power up amplifier
  102. Modified Dynaco PAS Phono
  103. Filter Chokes wired for CMR
  104. Capacitors / K12G Tube Amp
  105. Sansui SM-30
  106. RCA Phono Preamplifier with 12ax7
  107. separate filament transformer for 5u4g?
  108. EL34 Triode strapped amplifier
  109. Testing emission without risk
  110. Anyone Build the Borbely 15W 6C33C SE?
  111. Cheap and upgradable preamp
  112. Source for least expensive tubes.
  113. 5 Pin Tube Socket Suggestions Please
  114. UXCV-11 plates?
  115. Top 5 Most Popular Tube Base
  116. 6C33C and Computer PSU
  117. Output transformer impedance for a 4P1L PSE
  118. Specs of old output transformer
  119. altec 1570b
  120. Mixed tube and ss stages grounding. Best practice?
  121. Any news from Tribute?
  122. What are this....a tube or lamp or etc?
  123. duff tube? Little Bear P1
  124. Opinion on amp build
  125. K12G For Mom & Dad
  126. RIAA Network Position
  127. 6k5GT - Good Tube Curves?
  128. 5902 pentode datasheet confusion
  129. Hum in one channel on Headphone Amp
  130. KT24 datasheet, help !!!
  131. Chicago Standard Transformer Company OPT's
  132. Help on repairing messed up AMC CVT3030
  133. Anyone traced triode curves for the 6CZ5?
  134. anthem pre-1
  135. split supply for tubes
  136. Rufus p. Turner AC-DC amp
  137. 1937 Philco Radio Amp - Build Thread
  138. Transformers for valve headphone amps
  139. Help with negative feedback
  140. Silicon Diode Measurement Confusion
  141. grommet against vibrations
  142. Help with a Moscode 300
  143. Help Identifying Valve Amplifier
  144. capacitors
  145. Questions about console parts salvaging
  146. Regarding EDCOR Transformer Data
  147. PYE mozart
  148. Tube swapping with my Condensor Mic
  149. found amp - identity unknown
  150. how to low the gain
  151. VTL TL-2 tube preamp
  152. Need Advice for Bi-amping
  153. Baldwin organ amp
  154. Octal Aikido with gain/buffer switch?
  155. Harman Kardon Stereo Tube Amp Oscillator Help!
  156. Electro-Harmonex 6973 Question
  157. Power and plate current in a SE amp
  158. 6883B for use as a audio output tube
  159. "Distortionless" Tube Oscillator -Cutting Edge Technology
  160. Feedback RH84 6v6
  161. copper wire from socket bolts to exhaust tip?
  162. What KT88 brands can handle high B+ triode connected?
  163. Williamson-style circuit with Schade feedback using pentode driver stage?
  164. GM70 tube copper vs graphite plate???
  165. About Dark Heater Tubes.
  166. Sylvania 5692 Black base tubes
  167. Tube Tester in Montreal
  168. Unsual use of triode?
  169. What the hell is Class A3 ?
  170. High voltage triodes (true triodes)
  171. Ceramic Filter Selection
  172. Power supply mosfet vs choke filter
  173. Capacitors used in Conrad Johnson PV7
  174. HH Scott 299A center out to subwoofer
  175. PP Amplifier Advice Sought: EL34/KT88 UL/Triode
  176. Search for StepUp 12V->142V @ 6mA
  177. Magnavox 8802 upgrade suggestions?
  178. filament supply using two bridges
  179. 6N2P-EV gain factor ??
  180. Talking tube replacements
  181. Audi Institute VR70E amp
  182. Share Fixed Bias using Diodes
  183. Arcturus Blue Tubes
  184. share your experience on sound of hybrid amps
  185. ideas for a simple ECL82/86 p-p amp?
  186. Tube replacements or substitution
  187. 12ax7 / 12au7
  188. Triode/Pentode Loadline Calculator
  189. High Voltage Derived Bias Supply
  190. Universal hybrid triode-mosfet input/drive stage
  191. IT coupled 1624 or 807 amp
  192. Raytheon / Western Electric JW-5755 / 420A
  193. Calculate unknown operating point from known cathode resistor
  194. 5763 triode curves
  195. Constant current heaters
  196. max G2 voltage 1624 tube (Tabor)
  197. Need reference for Dynaco MKIV amp build
  198. Biasing Valve on Bipolar Power Supply
  199. $1800 tube amp
  200. Testing a 6N3 5670 etc on a B&K 600 tester
  201. Could anyone shed any light on this amp for me?
  202. Translation Russian EL84SE design please?
  203. Determining plate and screen voltage
  204. I Don't want to set the forum on fire . . .
  205. Valab Ultra Low Noise Regulatible
  206. Westinghouse 6973 Tube
  207. Which is worth burning or keeping
  208. OPT position
  209. Remove volume pot
  210. Headphone amp ideas?
  211. Good Looking 6SN7
  212. UTC Transformer
  213. Cap substitution help
  214. Edcor replacement for w5m peerless opt
  215. No Feedback Balanced Line Design
  216. KT120 PP - "low power" baptized Vitruvian amplifier
  217. Hovland Sapphire guidance needed
  218. Question about specialized OPT
  219. k16ls tube amp on/off switch?
  220. SY Tube Phono Improvements?
  221. Tube newbie, anyone familar with s-5 k-502? Help needed please
  222. TVA-1 Michaelson & Austin with problems
  223. New to HIFI tube need advice
  224. Crosstalk between Triodes in Dual Triode Tubes
  225. 6L6GC instead of EL34
  226. Schade feedback and CFB
  227. Sansui AU-70 - Help Needed
  228. Pentode C.F, where to connect the suppressor grid ?
  229. Separate PSU for PP EL34 / 6SN7GT integrated amp
  230. Simple SE driver with mosfet (6sn7/307A) IRF820
  231. Is it safe to run pentode w/ no screen voltage for a min?
  232. Low B+ and CCS question
  233. Has anyone ever used slate in audio?
  234. Semi-Fixed Bias?
  235. Transformers MIC and Phono
  236. 6L6GC...More Voltage...or More Current?
  237. help me
  238. Anybody built/heard Melquiades amp
  239. Elevated grid bias
  240. Oscillation found in Luxman LX33
  241. RCA phono amp project
  242. Test of 45 Triode with EICO 625?
  243. Standard Silicon Diode Rectifier's VS Ultra Fast
  244. Output Transformer for L3 pre Audio Note
  245. "Boosted" Triode operation?
  246. 6HB6 UL push pull amp
  247. Interstage transformer ratio, spacecharge tubes in PP
  248. 6N6P line stage
  249. Revamping Tube Amp Monoblock - capacitor grounding concern
  250. 845 set bias.

Content Relevant URLs by vBSEO 3.3.2