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. Info wanted on OPT....
  2. 6P43P Strange Plate Graphs
  3. Multiple Phono preamp
  4. pas filament supply
  5. HV on high voltage amps
  6. Lageschaar hybrid-connection PSE-KT66
  7. First DIY from scratch
  8. Ballance resistors
  9. casing about SOHA I headphone amp
  10. Any interest in 56 various tubes?
  11. Help with exploding tubes!
  12. My new filiment PS for Push Pull GM70
  13. So what exactly do I have here? Heathcraft EA-2
  14. first experience with retro electronics
  15. Revising a tube pre-amp: can't find parts?
  16. Info for Pioneer SA-810 tube amp
  17. Has anyone tried tx2575 in cathode resistor?
  18. 12JZ8
  19. Is it OK to drill mounting holes in transformer laminations?
  20. Seeking Sescom Transformer Specs
  21. Calibrating a Sencor ??
  22. Capacitor in parallel with negative feedback resistor
  23. Old electronics repair store closing. Hartford. FYI. Not related
  24. CL ad for tubes in MA. FYI only. Not connected
  25. Distortion in amp after warm up
  26. Re-bias when changing from Triod to Pentode
  27. Yaqin MC-10L - Electricity in volume knob
  28. Newbie question about a 300B amplifier
  29. Modified Wavebourn Tower II ?
  30. Elevated Heater Voltages - 40v?
  31. Free Tubes!
  32. found tube i like, only small bits of red letter,what tube brands used red lettering?
  33. Impedance problem Of O/P Transformer
  34. Runaway tubes or tubes drawing excess current--baffling
  35. croft SD3 CROFT PREAMP
  36. valve phono stage on a budget
  37. Dynaco vs. Dynaclone
  38. Amplifier Problem - Need help!
  39. Idea for a 6n1p preamp
  40. K & K Audio Two Terminal Constant Current Source
  41. Counterpoint SA-12 wackyness
  42. Shuguang SG-50
  43. manley EQP-1A Tube EQ
  44. El34 PP advice needed
  45. Fosgate Punch 800 a4, diagram needed
  46. Power Transfomer For Valve Amp Question
  47. a 'simpler' tube/valve mixer topology
  48. Qustions about centre speaker connection
  49. Using Seperate Preamp to Drive S-5 Electronics K-16LS Integrated Amp?
  50. 0d3 for el84 screen regulator
  51. Edcor XPWR059 power problem
  52. Did bootstrapping pot change it's operation
  53. Transformer wiring (Need Help)
  54. Class-d Hybrid
  55. New test data comparing different 7591's
  56. Eico 666 Tube Tester Freaks Out When Testing Rectifier Tubes
  57. ZKIT2 Zen Triode mono SET amplifier kit
  58. Tango 11146 Output Transformers ?
  59. KT120 Tube
  60. B&K Dyna-Quik 500 test socket 9A shows good tubes as Bad
  61. Mu follower
  62. Aronov LS9100 - any info ???
  63. Tube Preamp Dock
  64. Substituting potentiometers
  65. Grounded grid Zout
  66. HY69 in triode mode...some experience ?
  67. ITA LA 1B SCHEMATICS????
  68. Bleeder Resistor (Need Help)
  69. use of 12ax7 and 6v6 as 6T9 alternative?
  70. Positive feedback for amplifier input stage
  71. Rusted OT Issue?
  72. Multiple filament windings
  73. need help with frist tube amp
  74. Testing Western Electric 437a with TV-7D/U ?
  75. Graaf 5050
  76. finished breadboard project
  77. How Much is Too Much Filtering?
  78. 2a3 - for car use?
  79. troubleshooting a Mingda MC34AB
  80. How to repair and refurbish vintage tube amps?
  81. How to repair and refurbish vintage tube amps?
  82. NYAL OTL3 Amps
  83. 6DJ8/6922 rolling... any general consensus on these?
  84. Mullard 12AU7 tests bad when running grid leakage test?
  85. Can you identify this AMP??
  86. effects of different HT voltage
  87. Substituting a 12AX7 for a 12DW7
  88. what to do with 1uF???
  89. Correct power rating for Chicago OT - opinions
  90. Need help with Stancor 1.5 K OPT Tran.
  91. S5 K8-LM mono KIT (total newbie)
  92. Pentode section of 6M11
  93. Looking for goodme proven 2A3 SE project
  94. Music Angel MENG Series EL34 Push Pull Tube Integrated Amp
  95. Tube replacement causes bias problems.
  96. Spectra of tube glow: any data?
  97. Plate Characteristics for 6158 dual triode
  98. Center tap or not...
  99. Connecting G3 to a negative supply on a pentode
  100. Dynaco FM-3 Curcuit Boards
  101. Sonic Frontiers Line 2 schematic
  102. Philips Hi Z radio amp
  103. Need help modifying tube bias circuit
  104. filament transformer current rating
  105. SE OT power tube suggestions please!
  106. What is up with this wave form?
  107. Volume Controls
  108. Help identifying driver stage
  109. Uses for Cheapo 6CB5
  110. Twin DN2540 in TubelabSE?
  111. Bias or loss of power in one channel problem
  112. Drilling a hole in a Tube :)
  113. Tube stage placement in a mongrel (hybrid) amp
  114. Tubelab Single Ended
  115. Quad KT88 driver
  116. Single Ended Output Transformer
  117. 300B with interstage
  118. Problem with Aria (Meng) Mini 6p1 (glowing plate)
  119. possible to filter dips in AC line?
  120. Weston Ammeter Headphone Amp Prototype
  121. What is the fault with this amp?
  122. k-12G turret board version
  123. low voltage "high gain" amp
  124. Wanted: ELNA Cerafine 10000uf 63v New or used
  125. Connect ipod/laptop to old 1950's radio
  126. (Weston Ammeter Headphone Amp Redux ?)
  127. Would it be possible to drive a 300b with new power jfets?
  128. Would it be possible to drive a 300b with new power jfets?
  129. Will KT88 increase output power in Copland CTA-402
  130. Music Angel XD-SE EL34 intermittent thump
  131. OPT with cathode feedback
  132. Rebuilding fisher sa-1000
  133. Little Dot Mk IV SE
  134. EF86 on HICKOK 752a tester..??
  135. Choke power supplies and bypassing.
  136. Load resistor on OPT
  137. Ultimate Octal
  138. Help needed for 6H30 output schematic for DAC
  139. KT88 doubt
  140. Leave it on or turn it off?
  141. Did I do this loadline correctly
  142. Masco MA-35 rebuild
  143. Motorola SE console amp blown fuse
  144. What to do with Telefunken parts?
  145. OT as buffer?
  146. Single ended EL84 Schematic
  147. Pattern for power xmfr magnetic leaking ?
  148. heater voltage
  149. Small Speakers for 5 channel single ended amp
  150. missing circuit components- why?
  151. What to do with a 6N14P/ECC84
  152. Info for very rare neon tubes?
  153. UL for EL84. 22-24% is better than the dogma....40% is lowest distortion....
  154. Jan Tube question
  155. 60 watt tubeamp with Low B+
  156. What types of SET rock the hardest?
  157. UTC A16 interstage 300B
  158. 6C33
  159. Need wiring schematic for Conn 6050 amp
  160. 6N6P at very low voltage
  161. Transformer Swap
  162. Need help building a tube linestage for my gainclone
  163. Ping SY: His Master's Noise
  164. Wollensak SE 7591 parts projects?
  165. 807 screen voltage help
  166. My little 801A power amplifier
  167. Help needed finding a small DPST switch - confused!
  168. Help with bias pot- wont adjust!
  169. 6N6P / ECC99 / E182CC
  170. bias question
  171. Really low parts could el84 pp design for a beginner?
  172. moviola tubes -- other names?
  173. DHT with TDA1541A in a NOS DAC?
  174. 6C33C-B Tube Tester
  175. VT100mk2 - Retubing
  176. Parallel 6L6 se iron suggestion.
  177. 6N2 Tube Srpp Drive Stage
  178. Unexpectedly good EL84 amp
  179. Kypo Electronic - Buffer, Preamp & Amp kits
  180. PSU bypass cap type
  181. Yaqin MC10-T
  182. Yaqin MC10-L Need help collating data
  183. Wanted: High Quality Complete tube NOS DAC with TDA1541A
  184. 6360 or 6939 as a phase inverter
  185. Peerless 16687 & 7142 Transformer Identification
  186. Wanted: High Quality DIY Tube NOS DAC with TDA1541A
  187. Restoration of leak stereo 20: advice pls
  188. DC Tube Heaters
  189. Musical Paradise MP-428 300B Amplifier
  190. Tube regulator
  191. Why overvoltage on HT?
  192. 50c5 schematic question
  193. Me again... matrix decoding w/ tubes?
  194. chapman 305 transformer wiring
  195. tube rolling el34 need advice
  196. Adding resistance to OT circuit.
  197. Tube pre-amp + Class-D amp. any experience?
  198. Bias using a ccs as an anode load
  199. Magnepan High Frequency Tube Amp
  200. Home-Made Plate Curves
  201. Vacuum Tube Audio PH-11
  202. Latest project SRPP valve front end with class D MOSFET output stage.
  203. Melos 400 restoration project - need help (unaltered reference needed)
  204. Comparison of Sovtek 5751 and RCA 5751
  205. Replacing electrolytic caps
  206. Heater supply for the 866a
  207. How good is good enough when designing a line stage?
  208. Cathode/plate resistors ??
  209. Tubes and LTspice?
  210. Is this an oscillation problem? -broskie CCA linestage
  211. Simple Octal SET help.
  212. Capacitor Sanity Check
  213. VTVM substitute?
  214. What music/sound style for 845 tubes?
  215. Advice Needed
  216. Favorite ouput tube (SE only)
  217. Best make of audio valves/tubes
  218. How to calculate source impedance for audio transformer?
  219. Schematic for REDDi DI-Box?
  220. what the best kit for Dynaco
  221. That mystery trem cap
  222. A Hot Rodded Bottlehead S.E.X. Amplifier
  223. Cheap Chinese amps
  224. Wanted: Leak ST-50 Mains transformer 240V
  225. Who makes their own OPT around here?
  226. 71A
  227. Sound quality chinese tube amplifiers
  228. freeware circuit simulator for Osx (Mac)
  229. 12ax7LP substitute
  230. RH84 SE Build and custom Edcor power transformer
  231. 6l6 se primary impedance choice
  232. Luxman SQ38FD mkII, schematic
  233. 6c33 SET (my next project). Need some feedback
  234. Amorphous iron UMCCC-125: what would you do from it?
  235. Old Fisher SA-300 Amp help!
  236. What kind of sound does a noisy 12B4 make ??
  237. KT88 bias current keeps drifting
  238. Oddball Tube - Useful for Audio??
  239. 12AX7 dual triode "Signal Enhancer/Conditioner"
  240. 2nos of 6l6 in Parallel SE mode
  241. Output transformer selection
  242. 5C8S rectifier psud2 modle/rectifier information
  243. EF80 / KT77 SIngle Ended
  244. Longevity of output tubes in triode vs pentode
  245. ekco ui59 receiver
  246. simple heater question .....
  247. Different Differential Pairs
  248. Decware Zen SET (first project/90% finished)
  249. YL-1200 for audioamp
  250. 7984's

Content Relevant URLs by vBSEO 3.3.2