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
  1. Data for PE08/40
  2. PA-060 use
  3. Anode loaded 6080 giving less than unity gain, Why??
  4. Frustration with hum and noise in guitar tube amp
  5. 3/8in thick acrylic - would this make a good chassis?
  6. 6c19p Se?
  7. CF and SRPP in one circuit . .
  8. WE417/437 with battery or RC on cathode
  9. Building a Preamp:Dual Outputs Question
  10. Audio Note Conquest?
  11. metallized caps instead of electrolytics in a tube rectifier power supply?
  12. Power transformer as Parafeed output?
  13. Bogen amp
  14. Noob question about plate load
  15. adjusting gain?
  16. Lowering HT
  17. Kaneda hybrid preamp error ?
  18. Match priorities to schematic & toobs
  19. what do you think of this integrated?
  20. Modified Audio Note M7 Tube Pre Amplifier PCB
  21. lundahl xformers - are they potted?
  22. Beginner's very simple line pre-amp
  23. UX-226 Preamp
  24. Difference between microphones
  25. sv572-30, where to find
  26. E182CC - how to connect heater supply?
  27. Aikido pre tube for Minimum Gain
  28. 14gt8...clipping diodes?
  29. HPHV regulator
  30. Grounded Grid
  31. NYAL Super-It - removing volume pots, what resistor value to replace them?
  32. Another Bogen Conversion
  33. Trouble with my "new" PAS-3 Preamp
  34. Tubalizer, Monica
  35. musical angel modified marantz 7 preamp schematics
  36. Can anyone suggest the "best" 300B SE sound quality schematic for a beginner like me?
  37. Solder directly on tube?
  38. article in NY Times on Russian tubes
  39. Sovtek's sad tale
  40. audio research LS25 preamp
  41. Schematic needed PL519 Push-Pull Ultra-Linear amp
  42. Use 6C19 in a phono amp?
  43. 6L6 Push pull -- Power tranny question
  44. INPOL technology. Duh.
  45. Transformer problem
  46. Anyone tried a hi-voltage project as their first?
  47. Schematic needed PL519 Class A SE
  48. Giaime's new toy - aka the UniOctal
  49. Critique my circuit?
  50. New EC8010-VT52 Amp
  51. EL84/6BQ5 triode pp with no cathode biasing
  52. EL34 Push Pull in Class A
  53. In search of tube audiophile in Dhaka, Bangladesh
  54. Passive preamp with utc transformers
  55. RGN rectifiers in PSUD2...
  56. Power amp harmonics ?
  57. bypass tone controls on heathkit sp-2
  58. PS Caps
  59. Doubts on cathode stripping in tubes
  60. Edcor amplifier --> 6l6 PP
  61. Welborne labs phono stage needs help, got killed in power surge last night
  62. Huge OPT and small tubes
  63. UTC technology
  64. Luxman 38FD schematic
  65. EL84 PP Diy. Pls help me!!!
  66. Wurlitzer amplifier needs help
  67. Grounding case of 6J5
  68. Tube HW question from a software guy
  69. 12AU7 tube preamplifier schema
  70. "Improved RIAA by Jax"-Power supply help needed!!!
  71. OT Overload question
  72. V76
  73. Application of 6877 ?
  74. First nos tubes
  75. Looking for tube sockets
  76. Input transformers impedance questions
  77. Hybrid amp schema?
  78. Hybrid Cascode ?
  79. Interstage topology question
  80. raccomandation with valve amps
  81. Power Transformers in Output!
  82. How do I design "SCREEN GRID DRIVE"
  83. My El34 SET
  84. Ancient Bogen 807PP Amp-Guitar
  85. Schematic needed 811a Class A2
  86. Power transformer from Tek545 'oscope
  87. Agape Audio Labs
  88. ETF06 - A century of good sound
  89. I completed my amp!
  90. Overload recovery
  91. Converting SS eq. to Tube
  92. oscillation
  93. Tube preamp with: 1V in and 15Vout???
  94. Electrolytic Cap Search
  95. Bibster's 5687 Linestage, the return
  96. Anyone know anything about Morreto amps?
  97. Determining Output Power
  98. Turn on static?
  99. Estimate power transformer current rate?
  100. Control grid Voltage / grid stoppers...
  101. Horizontal TV tubes used in amplifier?
  102. tube sterio preamp complete
  103. Cons for using instrumentation tube PS for project amp...
  104. Svetlanas site down?
  105. Calculations for new Power transformer
  106. Mullard CV4015 info?
  107. SMPS for tube amp?
  108. Pentode Push-Pull
  109. LL1660S Anomaly
  110. DIY Hybrid poweramp noise and hum problem
  111. tube questions
  112. Problems w/biasing a lC50
  113. Big Honkin Tele
  114. Tube DIY store
  115. Pronouced 300B amp Midrange
  116. Tube preamp with current mirror
  117. Transformer Coupling and Headphones? (Toob Noob)
  118. Who can explain the source of this Siemens 12AU7
  119. how does one tell when a tube is truely dead?
  120. A curious observation
  121. Help choosing capacitor value?
  122. Neon Power?
  123. The rectifier from hell, a little story.
  124. a directly heated monkey?
  125. 6l6gc SET, my first DIY
  126. SE Output Transformer Matching
  127. power tube biasing
  128. Jupiters: Tolerance: 26% over spec: o.k.?
  129. Help! 6DJ8 Tube Buffer Schematics
  130. Output Transformers for an EL84 Push-Pull Amp
  131. Advice regarding philips/mullard EL34
  132. 300b based monoblock plans
  133. need help for Marshall PCB
  134. Marshall schematic ?
  135. counterpoint Sa 5.1
  136. Help with bogen CH8
  137. where do you get those schematics / layouts?
  138. Spice 3f4 model of a low voltage direct heated signal level pentode
  139. ECC82
  140. Major diff between 12AX7 and 12AU7
  141. Voltage doubler question
  142. el34 instead of 6550
  143. Bogen CH8
  144. Ah Njoe Tjoeb 4000 problem
  145. my last project
  146. TIP50 voltage regulator
  147. Collets for 212 pins
  148. K-12M Enclosure + Upgrades. Finished!
  149. Will this work?
  150. Big tube - what is it?
  151. Help! no signal! Marshall JTM60
  152. PSU topology & regulator
  153. Dynaco from scratch
  154. 6HV5A Single Ended Amp
  155. Cheap but not too much !
  156. Quick Output Transformer Question
  157. Help with guitar tube amp mods
  158. strange thing with AMC 2030
  159. GE6072 replacement tube
  160. Counterpoint 5.1 preamp
  161. Tube library
  162. RIAA recording on CD
  163. Old SE transformer measuring?
  164. Speakers for tube amps...
  165. MF x10v3
  166. Free Tube Books.....
  167. A Transformer question
  168. 6v6 PP - No sound
  169. help with interstage needed
  170. Hum in Speakers
  171. Just another PP...
  172. Leak Stereo 20 questions
  173. 10M45 CCS, what am I doing wrong ?
  174. Various transformers
  175. tubes sound
  176. Power supply help!
  177. KR Tubes
  178. Bi-amp Between Tube, and SS
  179. 2 Tube questions,
  180. my biggest project ever , need lotsa help plz
  181. tube temperatures
  182. hh scott bias issues
  183. B+ required w/ ccs load
  184. Info re Soundtech powerone tube amp
  185. Verdier Regulated Power Supply
  186. 6DJ8/ECC88 mu-follower
  187. Tube Compressor
  188. Newbie PSU question
  189. Hickok Cardmatic tube tester cards
  190. Hashimoto SE Output Transformer
  191. Ripple and chokes
  192. Tubes driven by BJT's
  193. Red LED substitution questions
  194. Hytron big 71A
  195. Need some help for 6L6 amp
  196. 802 as an audio output tube
  197. Changing 6DJ8 SRPP stage gain
  198. Cooling In Cab / Minimum Vent Area?
  199. Tube voltage help
  200. MF XPre troubleshooting
  201. Giaime's Preamp Finished!!!
  202. Circuit and PCB Layout comments
  203. 4613 triode
  204. Help with inverter CCS+NFB
  205. Question about KT 88 integrated
  206. The Trials, and Tribulations of Bias
  207. Which components should be matched?
  208. Using PP output for SE?
  209. Tube Newbee Needing Guidance
  210. 12A/71A SET project
  211. 805 SE amplifier
  212. Playing with screen resistors
  213. Interpret this 12ax7 feedback loop
  214. Low voltage-drop CCS for LTP input stage?
  215. Tube Socket Mounting - rigid or floating
  216. SE-9 mod help please
  217. 2a3SE
  218. 20 Watt SE. I had found it.
  219. Ok to exceed Vg2 in triode? (Yes)
  220. Fender Adjustments
  221. Help needed in Bloomington IN
  222. % error for primary resistance
  223. Help Understanding Circuit (grounded grid I/V)
  224. Testing a 70.7v transformer
  225. thyratron?
  226. Tube frontend....
  227. Transformer and Choke Grounding?
  228. El509 Pse
  229. 6550 Safety Question
  230. Jadis Defy 7 : Manual
  231. Melos Ma-111b
  232. Old audio amp change
  233. Need 45 tubes
  234. Jadis Defy 7 : Manual ??
  235. Help for pre-amp and two single-ended finals
  236. Schematic needed:MFA Magus B
  237. Can I remove the input caps?
  238. 807 vs. 1624 tetrode ?
  239. how to make tube amp sound layback and mellow?
  240. Standard tube filament voltages and currents
  241. SE 20W. What tube?
  242. 5687 Linestage behaving odd...
  243. SMPS & tube pre-amp development board.
  244. Question about Melody KT88 amp
  245. Trafomatic Transformer
  246. Diode trick?
  247. Return of the vacuum tube sonic hologram generator
  248. 6V6 ->EL84 with 12AT7?
  249. design for 6336A OTL amp needed
  250. Aikido sound?