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

  1. Mic preamp input transformer alternative?
  2. What's the Best Way to Reduce Gain in a Preamp
  3. safety with high voltage input capacitor ?
  4. SE EL84 amp - reducing 100Hz hum
  5. Photos of large DHT preamps? (Or large amps in general)
  6. Minimum pin length (noval)
  7. Biasing of KT120
  8. SE to balanced transformer
  9. Decoupling Cap value - How Much?
  10. Cathode bypass Cap vs. No Bypass Cap
  11. Interesting circuit I thought.
  12. Yet another K12G thread
  13. 6N3 tube preamp question
  14. Driver vs Power tube
  15. Help in Bias tube amp for Adis Devy 7
  16. Tubes and HT
  17. HiFiMan EF-2A schematic sought
  18. Please, help with a WE91 project on behalf of a friend
  19. Proposed Headphone Amp Overhaul?
  20. protection of downstream line amp
  21. Is the 6E6P suitable for audio?
  22. me clone proto EL/PL 504
  23. Improving headphone amplifier
  24. 5902 LSTPICE Model
  25. Canary CA-301 PSU
  26. 3B28 oscilator
  27. A lot of schematics
  28. V8 amp
  29. market by Jac music
  30. 6P3C-1 SE ? .
  31. Cary slp70: Worth to upgrade?
  32. Hickok 123B tube tester
  33. Adding NFB makes headphone amp sound AWFUL!!!
  34. Filaments hard wired to B+ on EZ81 base
  35. What the bird is OS 18/600?
  36. ccs 10m90s what is wrong?
  37. Topology for balanced preamp
  38. 6v6 vs. 6l6 vs. 807 soundwise..
  39. Opinions/Advice on Triode Strap method
  40. Something like a Miniwatt N3 or APPJ PA0901A
  41. Extraordinary harmonics. Type 47 # tube amp.
  42. Made a new tube amp, 6J5 +27 +45
  43. Anyone ever play around with a GU-72?
  44. Possibility of using a UTC LMI-500 transformer...
  45. Aikido transformer
  46. Can someone explain why you need to re-adjust the balance on a tube amp every time
  47. Which factory made these tubes ?
  48. 813 and gm70
  49. 13E1 Push Pull
  50. dump find.
  51. ...6SN7GT operating points tube help.......
  52. 6L6 6SJ7 Amp please pick faults if any
  53. Updated DIY EL34B 6SJ7 SE Amp
  54. 6C18 x 6C33
  55. Vintage tube amp find
  56. any benefit to screen-grid drive a 6V6?
  57. Brown face Scott LK72
  58. Pilot 1060 integrated - make it better!
  59. Should I ground my K12G or my Bugle 2?
  60. 6c33 amp convert to 6c41
  61. STA-LEVEL thumbs problem
  62. Amp motorboating at power up
  63. Spice models for AL4 and RS242 tubes
  64. Mains Switch
  65. Suggestions for big output stage needed
  66. Very Good (or best?) 12B4 schematic?
  67. Amplifier for active bookshelf speakers
  68. Olson AM-240 schematic needed
  69. Valve amp - maintenance
  70. Your opinion about Rotel 930AX to hyrbid mod
  71. Weston Tube Tester 774-5
  72. Tube circuit sim software for free?
  73. 6v6 family tubes
  74. Troublesome bias resistor, cathodyne stage
  75. 6AQ5 excellent for line stage?
  76. Datasheet 6P42s and 6P45C
  77. Quad / Cyrus impedance matching
  78. Zobel network at primary audio trafo?
  79. ECL86 question
  80. 500c buzzing power transformer
  81. LM4702+6L6GB/807
  82. TubeAudio Mixer Blog
  83. Finally started on my 6L6 amp. Need tube suggestions.
  84. Just another Scott thread
  85. Design for overdriven output stage
  86. Seeking Articals On Audio Transformer Design & Construction.
  87. Bias el34 pp
  88. Photo Gallery.
  89. Precision S35
  90. 6L6WGB
  91. 6BQ7A Driver
  92. Advise for Simpson 340 signal generator problem
  93. Armaco TTHF or Calrad AP 15 What to do What to do?...
  94. Screen Power and Warmup
  95. Wanting copies of Prof. Alexander Bereskin's transformer winding pictures.
  96. what's the brand of this capacitor sounds great ?
  97. Edcor CXSE25-8-3.2K or Transcendar TT-017-OT?
  98. PP 2A3 Fixed Bias
  99. RL12P35 convert to el34
  100. Statistical regulator from VA 4rd edition
  101. Matching Impedances (the Math behind it) Please Advise if you have a grasp. Xfmrs etc
  102. Help 6AQ5 pushpull
  103. HV Logic Control Approach
  104. Valve heater question
  105. Phase inverter adjustment - Fisher 80AZ
  106. Repurposing a Bogen CHB-35A
  107. SMPS
  108. Interstage and bias failure
  109. Grid 2 current for GU19-1
  110. 6x5 tube
  111. IT coupled 6BG6GA
  112. Mystery noise has got me baffled
  113. Dynaco PAS: too much liposuction?
  114. LP Tape Noise
  115. YAKOV ARONOV MA-100
  116. Help for balance-tone control-mode selector bypass
  117. Opinions please: seeking a first class DIY SET amp design
  118. PSU for 6N6P
  119. HOT B+ capacitors!
  120. Analog meter monitoring HT supply
  121. Lamm LL2.1 DC Offset problem
  122. 6L6GT/6SJ7 Valve Amp DIY
  123. BHExchange for BottleHead's
  124. 6BY5GA elevated heater question
  125. Tone controls
  126. EL84 "IP" questions
  127. KIT Single ended KT88
  128. HELP needed - LEAK Varislope 2 Stereo + Stereo 20 with pictures...
  129. All tube cap tube amp?
  130. 12AX7 preamp for DAC
  131. Grid resistors -> GND
  132. OTL headphone amp distorting & clipping: weak power supply?
  133. Broken bias resistors (Yaqin MC-10L)
  134. Tube Enclosure suggestion from Europe.
  135. Benefit/SQ of tube stage at the input of ss power amp
  136. Is 6907 and QQV03-20A tubes are same?
  137. Found some chokes
  138. 6SN7 at low plate currents
  139. 12AU7, 12BH7, Darker Less Bright Option
  140. Heater current effects
  141. Not using all the sections on multi-section cap
  142. DC heater supply dies on me
  143. 1972 Leak Varislope 2 Stereo
  144. OPT secondary ground, stacked supplies
  145. OTL for HeaPhone
  146. Voltage doubler and filament supply
  147. Please suggest me a 6V6 class AB amp
  148. Need Review of wiring up of this SRPP 6AS7 tube amp
  149. Hum in a triode 1H6G...help !
  150. 40w Class A PP KT66?
  151. My new small amp EL84 SE Triode
  152. tube preamp output impedance
  153. pete millet 807 amp
  154. Lost Negative Bias-Fixed Bias
  155. Aikido ('dead quiet') output impedance
  156. Looking for lineamp buffer schematics
  157. Nagra VPA 845
  158. How to match 6C45?
  159. Yet another question about cathode bias (led+pnp)
  160. Ideal System for 1960?
  161. What replaces an IN541 diode?
  162. Bottlehead Eros or Tube4Hifi PH16
  163. Psvane 2a3 T Mk II reliable vender
  164. Odd Wima cap markings
  165. Chinese Amp kit experience
  166. Considerations about headph. OCL
  167. Trying to solve a Plate Follower Problem
  168. Nichicon Caps
  169. Footprint Noval ECC83 Altium
  170. Interference in hybrid amp
  171. wiring DHT filaments with center tapped secondaries
  172. B+ of Curcio Daniel II
  173. Stepped Attenuators Questions
  174. Noisy Ground? (Probably not a loop)
  175. New Production Telefunken
  176. Tube horizontal mounting position
  177. "Ask Jan First" parts website in Germany
  178. EZ215 Stereo 5881 Amp Project
  179. CCS help dn2540 send 340v to the chassis
  180. That's What She Said RH84 Build Log
  181. Help figuring out this output transformer.
  182. 5881 PPP Cathode Bias B+
  183. Measuring DHT filament V with minimal effect.
  184. 100hz hum with Audio Research vs-55
  185. Volume potentiometer
  186. Driver for 2A3C
  187. Regulated B+ sounds worse?
  188. Sylvania console amp rebuild...
  189. E130L Micron
  190. Question Re: Ground Loop Breakers
  191. Source for D3A/7721?
  192. ID a salvaged choke
  193. Magnetwire gauge size converted to metric
  194. ccs what is the best way
  195. parafeed test/measurement setup question.
  196. how do balance pots work?
  197. Issue with parafeed in SPICE
  198. GU-50 Dissected
  199. Need help on ground wiring for Scott 222-B
  200. Heathkit A9-C Mod
  201. Need a 240v, 5vac - 6-10A rectifier transformer
  202. Free Canadian Westinghouse Receiver #101: Super Heterodyne
  203. 6AS7 SET amp discussion from Photo Gallery
  204. DHT 100hz hum
  205. HP 8903B and Pete Millett's Software Problem ?
  206. How to identify an ARC D70 version ?
  207. Valve amp first build - questions
  208. Transfrmer Impedance Question
  209. Disappointing results from RH84
  210. Anyone Loose a Counterpoint SA-5000?
  211. Installing a 610 in to a B&K 500
  212. My first tube preamp (4S)....
  213. Recycling old iron with stiff wires.
  214. 6EM7 as driver... help !!!
  215. changing R1 value in SE amp
  216. Heater CCS makes for low voltage
  217. DHT & Indirect on same line?
  218. Which tube preamplifier kit for LM3886 amplifier?
  219. budgie pre-amp
  220. ecl82 class A pp, need schematic
  221. Input low pass preferred method
  222. cary SLP50A
  223. se output options for single/balanced tda1541
  224. FM noise in Fisher 90-T in FM mode
  225. ST Triodes?
  226. TUBECAD SE.
  227. RH84 build with SS recto and voltage doubler (any input?)
  228. Tube identification
  229. Brand new cap overheating - argh
  230. High Power Valves
  231. Tubelab SSE B+ and cathode resistor questions
  232. HIFI world 6080 se
  233. EF86 triode question
  234. Connecting a Headphone Jack to a Preamp
  235. PSE 300B "French connexion"
  236. Making a custom tube characteristic graph
  237. 300B DRD power supply
  238. Insanely High Common Mode Voltage Shunt Measurement
  239. Heathkit AA-151 troubles
  240. Tube Power supply question...
  241. Noob question on power transformer primary input voltage
  242. Dynaco ST35 testing for a blown power transformer
  243. 6n6p tube buffer
  244. Welborne Labs
  245. GU-50 triode
  246. Help track down noise in gyrator
  247. Earphone Amp Improvements
  248. Protecting Wire
  249. 45 SET : tubelab vs get*set*go vs ?
  250. 6SL7 in Maggy 175 amp...

Content Relevant URLs by vBSEO 3.3.2