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

  1. Tube Rectifier Capacitance?
  2. rca 189 b console amps need more info
  3. upgrade transformer?
  4. Parasitic oscillation? (picture)
  5. newbie question : driver/output relationship, input sensitivity
  6. Unknown tube logo
  7. Impedance, the 10x rule, losses & bandwidth
  8. el84/6bq5 PSE
  9. A very odd phase inverter- comments?
  10. Please check my work :)
  11. NOS purchase, should I be concerned?
  12. Strange splitter in the Audio Research D4
  13. 6ak5/5654 plate resistance
  14. What is the purpose of the g2 bypass cap?
  15. questionable 2a3 schematic
  16. A singular experiment with a unheated tube.
  17. Limited bass response in one channel
  18. Show me your fave phonostage circuits.
  19. tube heater voltage, how much is too much?
  20. Para feed choke
  21. Dynaco ST35 power?
  22. Tips/comments for upcoming 300B build
  23. page Eli Duttman's Simple p-p with 5965 MQ EXO-173 and 6AQ5
  24. DHT cathode follower idea
  25. GK71 Output Transformer
  26. Schematics for A.I. Mod 2D
  27. Determing Battery Voltage for cathode bias
  28. OT for audio but still tube
  29. Getting transfer characteristics
  30. Pentodes and Choke Loading
  31. Stepped airgap choke ?
  32. Noob question
  33. SE 300B Integrated Amp: Help choose circuit design
  34. SunAudio 2A3 to 300B
  35. Filament Snubber Cap Explodes! What happened?
  36. Alot of 12AX7's about
  37. DIY tube microphone preamp
  38. Wurlitzer/Fisher Amp Musings
  39. please check my work
  40. How to get cathode bias info from grid bias info?
  41. SE 300B Integrated Amp: Transformers
  42. Positive feedback, improperly drawn screen, or WTF?
  43. GE Console RC 7100 A - need some help!
  44. Output tube for 600V B+, 5800 ohm primary PP, tertiary 25% UL taps?
  45. Still tring to find a couple 100uf motor runs
  46. small push-pull amp to preamp
  47. Electraprint EL84 PP with PSA-2N
  48. Bogen MX-60A- output transformer bandwidth?
  49. 6AS7 Parallel Feed Amp
  50. Super 6BG6 vs. 6550
  51. 5687 line stage
  52. Audio Standards
  53. 4 x used 5867A (TB3/750) triodes
  54. 12au7 who has the best ultra low noise ???
  55. Questions about tweaking the Miniblok SET...
  56. The core -sonic reasons
  57. Removing pot from valve pre amp
  58. Power transformer question
  59. Tube construction materials
  60. LTP second grid
  61. How to figure out the bias point of fisher X-100A
  62. Schematic help! (Bell)
  63. Audio Note Soro SE SCHEMATICS
  64. 807 Tube Triode Connected
  65. Would you pls help.
  66. Anyone seen this amp topology before?
  67. Max. grid resistance
  68. Yaqin mc10l "popping"
  69. Audio Electronics Supply
  70. Alamo Fury 2566
  71. My friends in the USA - tube stores in LA
  72. Can this marraige work?
  73. RJM with 12AY7
  74. Bias winding to power sand
  75. FM Tube radio design
  76. What do you use? Not technical but relative.
  77. looking for a pre-amp schematic
  78. I have waay too many 6DJ8's
  79. Tango NP126
  80. Two 6J5 versus one 6SN7
  81. Bunch of questions regarding plate CCS and some else.
  82. Tube Store in Washington DC (6C33C Triode Buy Where??)
  83. Scott 399 Receiver Schematics?
  84. Need help with 6l6GC choices
  85. Need Hammond/Everett drawings.
  86. 6V6 PP-based Baby Huey/Mullard inspired design needed...
  87. Ecf80
  88. Please Explain difference Mono vs Push Pull vs Single End etc
  89. VU Meters
  90. diy preamps, bottlehead, decware....
  91. Power supply choke help needed
  92. LED cathode biasing in push-pull input stage
  93. applying fixed bias to cathode followers
  94. Battieries for B+
  95. Put amp in chassis, then, right channel doesn't work!
  96. hammond transformers?
  97. Two Rectifiers, One transformer
  98. Tubes currently in production
  99. Rachel's Corner - Shuguang
  100. Small 50C5 Amp improvements
  101. Low voltage pentode?
  102. TX distortion
  103. DIY U-L curves
  104. Transformer spacing
  105. Covers for budget output transformers
  106. Correct for bipolar voltage doubler?
  107. Source for 100uf motor run cap.
  108. magnavox 185aa with 4-6v6
  109. Yaqin 300B re-biasing
  110. Diy Line Amp 5670
  111. Diy Line Amp Jp-80
  112. Quality difference between output transformers
  113. A group-build project for a tube power amp in India
  114. pilot light ideas please
  115. Small signal pentode - zener screen regulation - why not ??
  116. Another KT-88
  117. Losing the treble and transient response in this PX25 SE amp
  118. Rod Coleman filament supply circuit boards
  119. Calculating Zout for Pentode amp with NFB?
  120. Bypassing a volume pot
  121. Lab supply for cathode bias experiment question..
  122. Rheostat for adjustable "fixed" bias?
  123. Output transformer Question
  124. Real Cost of Decware Amplifiers
  125. Digitally driven tube pre-amp
  126. Real cost of Dynaco ST 70 Kits
  127. Oddball Console Amplifier
  128. Transistor phase splitter (Yaqin MC-84L)
  129. Shuguang to stop 845 and 211
  130. first project.
  131. Se Kt-66
  132. Is there a power supply guru?
  133. Direct Coupling question
  134. What's the best way to hook up an Isolation transformer
  135. Marzio &Jelasi's Direct Coupled SE Amp
  136. 6SN7 or 6SN7GT??
  137. HY40 Power Triode
  138. parallel capacitors in PS question
  139. Looking for feedback on Bottlehead amps
  140. First Watt F3 / Tube Audio Design TAD-125 Hibachi JFET amps
  141. S-5 Push Pull Power Supply Upgrade!
  142. Output Transformer Air Gap
  143. PCF80 -Designing a Pentode Constant Current Sink - help needed.
  144. Purity and simplicity of amp design
  145. DIY Dynaco ST70
  146. Help need some info on this Raytheon
  147. Isolating parallel feed amplifiers
  148. Please help for B+ problem!
  149. "Sallen-Key" Public domain?
  150. Transformer questions / Good headphones?
  151. Which Spud Amp?
  152. Very simple SE Triode Help
  153. Tube friendly speakers
  154. Counterpoint SA5000 schematic
  155. Yaqin MC-10L
  156. Screen Driven Dissimilar Pentode SE Anti-Triode Spud
  157. Power tube bias increasing with signal.
  158. Preamp suggestion required pls
  159. How to change deemphasis from 75uS to 50uS for Fisher FM100
  160. Which 300B ?
  161. Custom OT for 6C33C tube - any advice
  162. s-5 tube amp hum troubles
  163. Cathode feedback on Mikael's SE KT88?
  164. RCA tube rectifier
  165. 300B Schematic
  166. My first amp!
  167. Building a Aikido preamplifier
  168. Tube rolling causes failure...
  169. Briefly subjected heaters to about 12v by accident.
  170. She lives!
  171. Wilcox Gay 5U
  172. 6EM7 project: maybe use more sand?
  173. 12B4A SET - any critiques on this project?
  174. Heathkit Manual
  175. What is this??
  176. Amp and Speakers decision
  177. Question about Low Impedence Filters on a Bogen PA Head Need Info.
  178. Counterpoint 3.1
  179. good book for learning the basics of tubes and tube amps
  180. Heater circuit - to twist or not to twist
  181. Rock and Flame: Wavebourn Barracuda
  182. Low voltage rectifiers?
  183. Horz Sweep amp Pent or screen drive
  184. Lessons learned building a 5VDC Power Supply for a 300B heater
  185. Getting frustrated--- amps and speakers for the noob
  186. Smallish chassis feasible? Multiple pics
  187. Using a Maida Regulator with a CCS
  188. Which Aikido pre-amp PCB for a newbie?
  189. FM transmitter / PA
  190. What value attenuator would you use in front of a 396A in a preamp?
  191. Hybrid OTL Circlotron idea
  192. Heathkit aa-121
  193. Help please checking my B+ design
  194. Selenium rectifiers
  195. isolation transformer - high voltage.
  196. Cathode Bypass in a PP Output Stage
  197. Mcintosh Tube Amplifier Protection Circuit
  198. Where to start? Or: cool these plates down
  199. Hum trouble on old PA amp
  200. Crazy newbie tube driver question
  201. UHF tubes for audio?
  202. Suggestion for this tube preamp
  203. 300B push pull amp
  204. Simple P-P 84 proto
  205. Keeping cost down?
  206. Tube Amp Kit for newbie
  207. 40% Tap direct to plate
  208. Funny bias problem in PP EL34. Please help
  209. Transformer from Heathkit A-7 amp
  210. Any tube stores in Burnaby, Vancouver, Canada?
  211. B+ time delay circuit - your comments
  212. PCB mount line input transformer question
  213. SRPP circuit question
  214. Russian tubes - what pin material?
  215. Auto-bias - easy to convert to or not?
  216. old style anode/grid caps
  217. 6H30 Dual Triode
  218. Why would the frequency response vary so much on a pair of Monoblock amps?
  219. Disassembling output transformer
  220. Tube sockets
  221. H. P. Friedrichs
  222. The Rebuilding of Theta KT-88 Tube amp.
  223. Please check my PS pcb board layout for problems????
  224. Help w/fixing counterpoint Sa7 preamp
  225. IXYS 10M45 CCS IC question
  226. Wing-C 300B tubes and opinions
  227. PX25 DRD Power amp.
  228. rectifier tube recommendation please
  229. 6C33C to more standard triode conversion - any ideas?
  230. PP EL84 Build Questions (Bevois Valley)
  231. Tube line stage output impedance
  232. volume between gain stages
  233. Dyna ST70 PWR Tranny 6.3V Crnt Spec?
  234. Next Project - Darling Amplifier or 45
  235. tube magazines
  236. PSU choke help please
  237. PCB Trace properties for PP tube amplifier ( 12AQ5, 6v6 etc)
  238. TubelabSE phase
  239. EML 300B XLS and Mesh comparison
  240. UL - triode switch
  241. Spud anyone?
  242. Nooo! Almost have this amp built!
  243. Need help - Old cap can ID
  244. 16SL7+6SN7 Aikido
  245. Anyone have a Bogen MX 60 Schematic they can post
  246. mc100b burned up
  247. DC heating, parallel diodes
  248. Identify Amperex Tube?
  249. Which speaker tap when going from UL to triode
  250. Tube wont bias...

Content Relevant URLs by vBSEO 3.3.2