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

  1. SEVETLANA "SV" 6550 C vs 6550 C
  2. Frank's 6SN7 - plate follower, noise
  3. Help running RH807 at higher voltage
  4. Preamp hum issues
  5. EML mesh plate 2a3 in DRD amp
  6. How to run RH807 at 400V?
  7. Preamp Umbilical - Use Shield as Ground Lead?
  8. Automatic Bias Control sliding bias
  9. Edcor Output Transformer Resistance
  10. Would this be worthwile restoring?
  11. Historic Tube Amplifiers
  12. 6HF5 testing
  13. A quick question about NFB
  14. PAS3 - are the tone controls really *that* bad?
  15. PP OPT in SE mode operation?
  16. Cheap 6n6p double ended push-pull idea - thoughts?
  17. Vintage WE Tubes
  18. SE amplifier advice..
  19. Mineature Tubes
  20. MD SM 102b transformer spec's please
  21. Vintage Marconi radio
  22. second order harmonics
  23. Hybrid amplifier
  24. Input caps for Motorola Console Amps
  25. to much gain
  26. Question - Type 19 tube
  27. alternative for footswitch??
  28. Noob. Help PP EL34 / EF86 both as triode schem.
  29. Yet another LA-2A
  30. RH84 SE, pentode driver... advice please
  31. Having an issue with a MOSFET in my Blue Hawaii
  32. Info wanted on OPT....
  33. 6P43P Strange Plate Graphs
  34. Multiple Phono preamp
  35. pas filament supply
  36. HV on high voltage amps
  37. Lageschaar hybrid-connection PSE-KT66
  38. First DIY from scratch
  39. Ballance resistors
  40. casing about SOHA I headphone amp
  41. Any interest in 56 various tubes?
  42. Help with exploding tubes!
  43. My new filiment PS for Push Pull GM70
  44. So what exactly do I have here? Heathcraft EA-2
  45. Please help identify this Amveco toroidal transformer.
  46. first experience with retro electronics
  47. Revising a tube pre-amp: can't find parts?
  48. Info for Pioneer SA-810 tube amp
  49. Has anyone tried tx2575 in cathode resistor?
  50. 12JZ8
  51. Is it OK to drill mounting holes in transformer laminations?
  52. Seeking Sescom Transformer Specs
  53. Calibrating a Sencor ??
  54. Capacitor in parallel with negative feedback resistor
  55. Old electronics repair store closing. Hartford. FYI. Not related
  56. CL ad for tubes in MA. FYI only. Not connected
  57. Distortion in amp after warm up
  58. Re-bias when changing from Triod to Pentode
  59. Yaqin MC-10L - Electricity in volume knob
  60. Newbie question about a 300B amplifier
  61. Modified Wavebourn Tower II ?
  62. Elevated Heater Voltages - 40v?
  63. Free Tubes!
  64. found tube i like, only small bits of red letter,what tube brands used red lettering?
  65. Impedance problem Of O/P Transformer
  66. Runaway tubes or tubes drawing excess current--baffling
  67. croft SD3 CROFT PREAMP
  68. valve phono stage on a budget
  69. Dynaco vs. Dynaclone
  70. Amplifier Problem - Need help!
  71. Idea for a 6n1p preamp
  72. K & K Audio Two Terminal Constant Current Source
  73. 6550 Push Pull noise in power stage
  74. 6P1P-EV PP guitar amp tryout.
  75. question about output transformer for guitar amp
  76. Hammond B3 tech help needed. Distortion only on certain notes/drawbar frequencies.
  77. Counterpoint SA-12 wackyness
  78. Shuguang SG-50
  79. manley EQP-1A Tube EQ
  80. El34 PP advice needed
  81. Fosgate Punch 800 a4, diagram needed
  82. Power Transfomer For Valve Amp Question
  83. a 'simpler' tube/valve mixer topology
  84. Qustions about centre speaker connection
  85. Using Seperate Preamp to Drive S-5 Electronics K-16LS Integrated Amp?
  86. 0d3 for el84 screen regulator
  87. Edcor XPWR059 power problem
  88. Did bootstrapping pot change it's operation
  89. Transformer wiring (Need Help)
  90. Class-d Hybrid
  91. New test data comparing different 7591's
  92. Eico 666 Tube Tester Freaks Out When Testing Rectifier Tubes
  93. ZKIT2 Zen Triode mono SET amplifier kit
  94. Tango 11146 Output Transformers ?
  95. KT120 Tube
  96. B&K Dyna-Quik 500 test socket 9A shows good tubes as Bad
  97. Mu follower
  98. Aronov LS9100 - any info ???
  99. Tube Preamp Dock
  100. Substituting potentiometers
  101. Grounded grid Zout
  102. HY69 in triode mode...some experience ?
  103. ITA LA 1B SCHEMATICS????
  104. Thoughts on PSU
  105. Bleeder Resistor (Need Help)
  106. use of 12ax7 and 6v6 as 6T9 alternative?
  107. Do I want fast settling or massive filtration in PS?
  108. Positive feedback for amplifier input stage
  109. Rusted OT Issue?
  110. Multiple filament windings
  111. need help with frist tube amp
  112. Testing Western Electric 437a with TV-7D/U ?
  113. Graaf 5050
  114. finished breadboard project
  115. How Much is Too Much Filtering?
  116. 2a3 - for car use?
  117. troubleshooting a Mingda MC34AB
  118. How to repair and refurbish vintage tube amps?
  119. How to repair and refurbish vintage tube amps?
  120. NYAL OTL3 Amps
  121. 6DJ8/6922 rolling... any general consensus on these?
  122. Mullard 12AU7 tests bad when running grid leakage test?
  123. Can you identify this AMP??
  124. effects of different HT voltage
  125. Substituting a 12AX7 for a 12DW7
  126. what to do with 1uF???
  127. Correct power rating for Chicago OT - opinions
  128. Need help with Stancor 1.5 K OPT Tran.
  129. S5 K8-LM mono KIT (total newbie)
  130. Pentode section of 6M11
  131. Looking for goodme proven 2A3 SE project
  132. Music Angel MENG Series EL34 Push Pull Tube Integrated Amp
  133. Tube replacement causes bias problems.
  134. Spectra of tube glow: any data?
  135. Plate Characteristics for 6158 dual triode
  136. Center tap or not...
  137. Connecting G3 to a negative supply on a pentode
  138. Dynaco FM-3 Curcuit Boards
  139. Sonic Frontiers Line 2 schematic
  140. Philips Hi Z radio amp
  141. Need help modifying tube bias circuit
  142. filament transformer current rating
  143. SE OT power tube suggestions please!
  144. What is up with this wave form?
  145. Volume Controls
  146. Help identifying driver stage
  147. Tube mixing console
  148. Uses for Cheapo 6CB5
  149. Twin DN2540 in TubelabSE?
  150. Bias or loss of power in one channel problem
  151. Drilling a hole in a Tube :)
  152. Tube stage placement in a mongrel (hybrid) amp
  153. Tubelab Single Ended
  154. Quad KT88 driver
  155. Single Ended Output Transformer
  156. SE P-P guitar amp.
  157. 300B with interstage
  158. Problem with Aria (Meng) Mini 6p1 (glowing plate)
  159. possible to filter dips in AC line?
  160. Weston Ammeter Headphone Amp Prototype
  161. What is the fault with this amp?
  162. k-12G turret board version
  163. low voltage "high gain" amp
  164. Wanted: ELNA Cerafine 10000uf 63v New or used
  165. Connect ipod/laptop to old 1950's radio
  166. Percieved Power outputs Tube vs Solid State
  167. (Weston Ammeter Headphone Amp Redux ?)
  168. Tube guitar amp for acoustic guitar?
  169. Would it be possible to drive a 300b with new power jfets?
  170. Would it be possible to drive a 300b with new power jfets?
  171. Will KT88 increase output power in Copland CTA-402
  172. Music Angel XD-SE EL34 intermittent thump
  173. OPT with cathode feedback
  174. Rebuilding fisher sa-1000
  175. Little Dot Mk IV SE
  176. EF86 on HICKOK 752a tester..??
  177. Choke power supplies and bypassing.
  178. Load resistor on OPT
  179. Ultimate Octal
  180. Help needed for 6H30 output schematic for DAC
  181. KT88 doubt
  182. Leave it on or turn it off?
  183. 6y6 output tube and Fender Champ(ion)
  184. Did I do this loadline correctly
  185. Masco MA-35 rebuild
  186. Motorola SE console amp blown fuse
  187. What to do with Telefunken parts?
  188. OT as buffer?
  189. Single ended EL84 Schematic
  190. Pattern for power xmfr magnetic leaking ?
  191. heater voltage
  192. Small Speakers for 5 channel single ended amp
  193. missing circuit components- why?
  194. valve rectifier series resistors
  195. What to do with a 6N14P/ECC84
  196. Info for very rare neon tubes?
  197. Fender 5F1 Champ clone with triode mode
  198. UL for EL84. 22-24% is better than the dogma....40% is lowest distortion....
  199. Jan Tube question
  200. 60 watt tubeamp with Low B+
  201. What types of SET rock the hardest?
  202. UTC A16 interstage 300B
  203. 6C33
  204. Need wiring schematic for Conn 6050 amp
  205. 6N6P at very low voltage
  206. Transformer Swap
  207. Need help building a tube linestage for my gainclone
  208. Ping SY: His Master's Noise
  209. Wollensak SE 7591 parts projects?
  210. 807 screen voltage help
  211. My little 801A power amplifier
  212. Help needed finding a small DPST switch - confused!
  213. Help with bias pot- wont adjust!
  214. 6N6P / ECC99 / E182CC
  215. bias question
  216. Really low parts could el84 pp design for a beginner?
  217. moviola tubes -- other names?
  218. DHT with TDA1541A in a NOS DAC?
  219. 6C33C-B Tube Tester
  220. VT100mk2 - Retubing
  221. Parallel 6L6 se iron suggestion.
  222. 6N2 Tube Srpp Drive Stage
  223. Unexpectedly good EL84 amp
  224. Kypo Electronic - Buffer, Preamp & Amp kits
  225. PSU bypass cap type
  226. Yaqin MC10-T
  227. Yaqin MC10-L Need help collating data
  228. Wanted: High Quality Complete tube NOS DAC with TDA1541A
  229. 6360 or 6939 as a phase inverter
  230. Peerless 16687 & 7142 Transformer Identification
  231. Wanted: High Quality DIY Tube NOS DAC with TDA1541A
  232. Restoration of leak stereo 20: advice pls
  233. DC Tube Heaters
  234. Musical Paradise MP-428 300B Amplifier
  235. Tube regulator
  236. Why overvoltage on HT?
  237. 50c5 schematic question
  238. Me again... matrix decoding w/ tubes?
  239. chapman 305 transformer wiring
  240. tube rolling el34 need advice
  241. Adding resistance to OT circuit.
  242. Tube pre-amp + Class-D amp. any experience?
  243. Bias using a ccs as an anode load
  244. Magnepan High Frequency Tube Amp
  245. Home-Made Plate Curves
  246. Vacuum Tube Audio PH-11
  247. Latest project SRPP valve front end with class D MOSFET output stage.
  248. Melos 400 restoration project - need help (unaltered reference needed)
  249. Comparison of Sovtek 5751 and RCA 5751
  250. Replacing electrolytic caps

Content Relevant URLs by vBSEO 3.3.2