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

  1. ST70 coupling caps eyelet location on PC-3?
  2. Some help with PCL86 Headphone amp Project
  3. Top (sound) quality valve phono stage
  4. Calculating cathode follower using 12AU7 for 90V supply
  5. Cathode resistor
  6. Help with an old Capitol
  7. Cathode bypass cap
  8. balanced post-OT line output?
  9. Blown SE mono, troubleshoot
  10. What is this circuit for?
  11. Siemens EL 86 NOS?
  12. Valve Operational Amplifiers
  13. What will be the best drive to 211 tube?
  14. Dual 845 SE A2 questions
  15. Harman Kardon Citation I, II, & III (Special thanks to Jim McShane and Eli Duttman!)
  16. Heater rewiring from 6N2 to 12AX7 with 6.3VAC
  17. heater bias value
  18. the hum or is it a siliconray kit
  19. DC Automatic Bias Control - Auto fixed bias
  20. What makes an OT a good OT for audiophile and need suggestion.
  21. The totally capless DHT SET amp - 300B or others
  22. Angled Socket brackets?
  23. Octal or loctal tubes as cathode follower?
  24. Used int amp please help to figured out?
  25. Rod Coleman heat sink question
  26. Tubelab SE + Fostex fe206en vs room size! suggestions needed please!
  27. ef86 pentode/triode switch: voltage rating?
  28. Input to pre-amp
  29. EML 300B
  30. Need suggestion in building a stereo power amp
  31. VALVO EL84 and ECC83 TELEFUNKEN ID?
  32. Bogen E-75 tube amp
  33. Quad II amplifier needed for parts
  34. Low voltage 6N1P RIAA?
  35. Does anybody collect vacuum tube ADV
  36. HDMI connection causes hum on Quad 303
  37. ECC81/12AT7 "sweet spot"
  38. Phono Preamp Hum
  39. Benefits of high voltage source for preamp
  40. Auto Bias
  41. Thomas Mayer Sound Processor pics
  42. Have you used the 15A6 pentode as an audio output tube ?
  43. Can I use a 5 volts tap for 6SN7 heaters?
  44. Any opinions about this tube amp kit ?
  45. 300B odd behaviour
  46. Aikido starter help requested
  47. 10Y FILAMENT VOLTAGE MARGIN
  48. Wiring a multitap transformer. Help needed
  49. A directly heated pentode folded cascode
  50. Zener Power Supply Clamp
  51. SPICE Simulator Giving Negative Gain
  52. SE 811 amp schematic...
  53. Philco Labled 12AU7A black-plate 45' halo getter- Raytheon??
  54. My FrankenAmp
  55. Panel Meter Install
  56. New Amp With Hum...
  57. EF184-6j51p Load by CCS or Resitor
  58. Slew rate.. Something doesn't make sense to me.
  59. HK Citation V question
  60. Modifying a tube regulator
  61. 6BG6 Push Pull Parallel Amp Build
  62. adapting a FU32 Tube amp for QQE 03/20 tubes?
  63. audio innovations 500 one channel down?
  64. Questions about found Mullard xf1's
  65. SE 6BL7
  66. Sound Valves M60 schematics needed
  67. el34 class a mod advice please
  68. 12AU7 Genuine or remarked
  69. MIT, Triode amp cathode resistor load line
  70. Marry tube preamplifier with 2-Band Wien bridge equalizer
  71. Oddball tube question
  72. Guitar amp screen resistor selection
  73. 6H2n-EB Strange Codes??
  74. Triode Dick's KT88 PP Amp.
  75. Curves to EL 502 and EL 300
  76. Input level 1/2 ECC83 + EL84
  77. SMPS for valve design
  78. Cincinatti Mac Amps
  79. ss rectifier filter recommendate
  80. Determining plate current with non-standard screen grid voltages
  81. allnic hpa-5000
  82. Hodgepodge build
  83. Power Transformer weirdness/wiring problem
  84. Question trafo for Broskie Janus PSU
  85. Copland CVA-306 tube and output capacitor replacement
  86. Choice of Output Transformer
  87. Jumping in with both feet
  88. Large 9pin socket needed
  89. Line-up of old and currently produced RIAA Stages with tubes wanted (like EAR-834)
  90. Question about 6P31S
  91. 6N16B Aikido Cathode Resistors
  92. 1KV umbilical cords.... and other HV issues
  93. 300b Bewitch Amp Blows Fuses
  94. Dynaco ST-70
  95. Front-end topologies for PP
  96. tranformers
  97. How many LesBox units exist out there?
  98. Old Sylvania black-plate bent getter 12au7s
  99. Phono / pre amp section schematic suggestions
  100. 4P1L in parallel Single Ended
  101. Pair of Ampex 620 amps
  102. My SE 6S4S
  103. chinese ebay 12au7 + 6dj8 white cathode follower preamp boards?
  104. "chirp" when power up amplifier
  105. Modified Dynaco PAS Phono
  106. Filter Chokes wired for CMR
  107. Capacitors / K12G Tube Amp
  108. Sansui SM-30
  109. RCA Phono Preamplifier with 12ax7
  110. separate filament transformer for 5u4g?
  111. EL34 Triode strapped amplifier
  112. Testing emission without risk
  113. Anyone Build the Borbely 15W 6C33C SE?
  114. Cheap and upgradable preamp
  115. Source for least expensive tubes.
  116. 5 Pin Tube Socket Suggestions Please
  117. UXCV-11 plates?
  118. Top 5 Most Popular Tube Base
  119. 6C33C and Computer PSU
  120. Output transformer impedance for a 4P1L PSE
  121. Specs of old output transformer
  122. altec 1570b
  123. Mixed tube and ss stages grounding. Best practice?
  124. Any news from Tribute?
  125. What are this....a tube or lamp or etc?
  126. duff tube? Little Bear P1
  127. Opinion on amp build
  128. K12G For Mom & Dad
  129. RIAA Network Position
  130. 6k5GT - Good Tube Curves?
  131. 5902 pentode datasheet confusion
  132. Hum in one channel on Headphone Amp
  133. KT24 datasheet, help !!!
  134. Chicago Standard Transformer Company OPT's
  135. Help on repairing messed up AMC CVT3030
  136. Anyone traced triode curves for the 6CZ5?
  137. anthem pre-1
  138. split supply for tubes
  139. Rufus p. Turner AC-DC amp
  140. 1937 Philco Radio Amp - Build Thread
  141. Transformers for valve headphone amps
  142. Help with negative feedback
  143. Silicon Diode Measurement Confusion
  144. grommet against vibrations
  145. Help with a Moscode 300
  146. Help Identifying Valve Amplifier
  147. capacitors
  148. Questions about console parts salvaging
  149. Regarding EDCOR Transformer Data
  150. PYE mozart
  151. Tube swapping with my Condensor Mic
  152. found amp - identity unknown
  153. how to low the gain
  154. VTL TL-2 tube preamp
  155. Need Advice for Bi-amping
  156. Baldwin organ amp
  157. Octal Aikido with gain/buffer switch?
  158. Harman Kardon Stereo Tube Amp Oscillator Help!
  159. Electro-Harmonex 6973 Question
  160. Power and plate current in a SE amp
  161. 6883B for use as a audio output tube
  162. "Distortionless" Tube Oscillator -Cutting Edge Technology
  163. Feedback RH84 6v6
  164. copper wire from socket bolts to exhaust tip?
  165. What KT88 brands can handle high B+ triode connected?
  166. Williamson-style circuit with Schade feedback using pentode driver stage?
  167. potentiometer for blackface deluxe reverb
  168. GM70 tube copper vs graphite plate???
  169. +/-floating tube PSU for guitar ?! Schematic error ?
  170. About Dark Heater Tubes.
  171. Sylvania 5692 Black base tubes
  172. Tube Tester in Montreal
  173. tubelab.com's super tube SE
  174. Unsual use of triode?
  175. What the hell is Class A3 ?
  176. High voltage triodes (true triodes)
  177. Ceramic Filter Selection
  178. Eagle library for CMC teflon 9-pin tube socket?
  179. Power supply mosfet vs choke filter
  180. Capacitors used in Conrad Johnson PV7
  181. HH Scott 299A center out to subwoofer
  182. PP Amplifier Advice Sought: EL34/KT88 UL/Triode
  183. Search for StepUp 12V->142V @ 6mA
  184. Magnavox 8802 upgrade suggestions?
  185. filament supply using two bridges
  186. 6N2P-EV gain factor ??
  187. Talking tube replacements
  188. Audi Institute VR70E amp
  189. Share Fixed Bias using Diodes
  190. Finished my Tube DI/Preamp
  191. Arcturus Blue Tubes
  192. share your experience on sound of hybrid amps
  193. ideas for a simple ECL82/86 p-p amp?
  194. Tube replacements or substitution
  195. 12ax7 / 12au7
  196. Triode/Pentode Loadline Calculator
  197. Troubleshooting a Fender Champion 600
  198. High Voltage Derived Bias Supply
  199. Universal hybrid triode-mosfet input/drive stage
  200. IT coupled 1624 or 807 amp
  201. Raytheon / Western Electric JW-5755 / 420A
  202. Calculate unknown operating point from known cathode resistor
  203. 5763 triode curves
  204. HICKOK 539a QUESTION
  205. Constant current heaters
  206. max G2 voltage 1624 tube (Tabor)
  207. Need reference for Dynaco MKIV amp build
  208. Biasing Valve on Bipolar Power Supply
  209. Tubelab sse choke input 6v6
  210. $1800 tube amp
  211. Testing a 6N3 5670 etc on a B&K 600 tester
  212. Could anyone shed any light on this amp for me?
  213. Translation Russian EL84SE design please?
  214. Determining plate and screen voltage
  215. I Don't want to set the forum on fire . . .
  216. Valab Ultra Low Noise Regulatible
  217. Westinghouse 6973 Tube
  218. Which is worth burning or keeping
  219. OPT position
  220. Remove volume pot
  221. Headphone amp ideas?
  222. Good Looking 6SN7
  223. UTC Transformer
  224. Cap substitution help
  225. Edcor replacement for w5m peerless opt
  226. Audyn True copper caps.
  227. No Feedback Balanced Line Design
  228. KT120 PP - "low power" baptized Vitruvian amplifier
  229. Senior Design Project
  230. Hovland Sapphire guidance needed
  231. Question about specialized OPT
  232. My first build tubelab SE
  233. k16ls tube amp on/off switch?
  234. SY Tube Phono Improvements?
  235. Tube newbie, anyone familar with s-5 k-502? Help needed please
  236. TVA-1 Michaelson & Austin with problems
  237. New to HIFI tube need advice
  238. Crosstalk between Triodes in Dual Triode Tubes
  239. 6L6GC instead of EL34
  240. Schade feedback and CFB
  241. Sansui AU-70 - Help Needed
  242. Pentode C.F, where to connect the suppressor grid ?
  243. Separate PSU for PP EL34 / 6SN7GT integrated amp
  244. Simple SE driver with mosfet (6sn7/307A) IRF820
  245. Is it safe to run pentode w/ no screen voltage for a min?
  246. Low B+ and CCS question
  247. Has anyone ever used slate in audio?
  248. Semi-Fixed Bias?
  249. Transformers MIC and Phono
  250. Russian capacitor markings

Content Relevant URLs by vBSEO 3.3.2