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. 1:1:1 transformers
  2. Output transformer in the cathode?
  3. Popping DC
  4. Power transformer wiring issues
  5. easy question - Magnavox 86-01 owners...
  6. What's the Best Way to Reduce Gain in a Preamp
  7. safety with high voltage input capacitor ?
  8. SE EL84 amp - reducing 100Hz hum
  9. Photos of large DHT preamps? (Or large amps in general)
  10. Minimum pin length (noval)
  11. Biasing of KT120
  12. SE to balanced transformer
  13. Decoupling Cap value - How Much?
  14. Cathode bypass Cap vs. No Bypass Cap
  15. Interesting circuit I thought.
  16. Yet another K12G thread
  17. 6N3 tube preamp question
  18. Driver vs Power tube
  19. Help in Bias tube amp for Adis Devy 7
  20. Tubes and HT
  21. HiFiMan EF-2A schematic sought
  22. Please, help with a WE91 project on behalf of a friend
  23. Proposed Headphone Amp Overhaul?
  24. protection of downstream line amp
  25. Is the 6E6P suitable for audio?
  26. me clone proto EL/PL 504
  27. Improving headphone amplifier
  28. 5902 LSTPICE Model
  29. Canary CA-301 PSU
  30. 3B28 oscilator
  31. A lot of schematics
  32. V8 amp
  33. market by Jac music
  34. 6P3C-1 SE ? .
  35. Cary slp70: Worth to upgrade?
  36. Adding NFB makes headphone amp sound AWFUL!!!
  37. Filaments hard wired to B+ on EZ81 base
  38. What the bird is OS 18/600?
  39. ccs 10m90s what is wrong?
  40. Topology for balanced preamp
  41. 6v6 vs. 6l6 vs. 807 soundwise..
  42. Opinions/Advice on Triode Strap method
  43. Something like a Miniwatt N3 or APPJ PA0901A
  44. Extraordinary harmonics. Type 47 # tube amp.
  45. Made a new tube amp, 6J5 +27 +45
  46. Anyone ever play around with a GU-72?
  47. Possibility of using a UTC LMI-500 transformer...
  48. Aikido transformer
  49. Can someone explain why you need to re-adjust the balance on a tube amp every time
  50. Which factory made these tubes ?
  51. 813 and gm70
  52. 13E1 Push Pull
  53. dump find.
  54. ...6SN7GT operating points tube help.......
  55. 6L6 6SJ7 Amp please pick faults if any
  56. Updated DIY EL34B 6SJ7 SE Amp
  57. 6C18 x 6C33
  58. Vintage tube amp find
  59. any benefit to screen-grid drive a 6V6?
  60. Brown face Scott LK72
  61. Pilot 1060 integrated - make it better!
  62. Should I ground my K12G or my Bugle 2?
  63. 6c33 amp convert to 6c41
  64. STA-LEVEL thumbs problem
  65. Amp motorboating at power up
  66. Spice models for AL4 and RS242 tubes
  67. Mains Switch
  68. Suggestions for big output stage needed
  69. Very Good (or best?) 12B4 schematic?
  70. Amplifier for active bookshelf speakers
  71. Olson AM-240 schematic needed
  72. Valve amp - maintenance
  73. Your opinion about Rotel 930AX to hyrbid mod
  74. Tube circuit sim software for free?
  75. 6v6 family tubes
  76. Troublesome bias resistor, cathodyne stage
  77. 6AQ5 excellent for line stage?
  78. Datasheet 6P42s and 6P45C
  79. Quad / Cyrus impedance matching
  80. Zobel network at primary audio trafo?
  81. ECL86 question
  82. 500c buzzing power transformer
  83. LM4702+6L6GB/807
  84. Finally started on my 6L6 amp. Need tube suggestions.
  85. Just another Scott thread
  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. Edcor CXSE25-8-3.2K or Transcendar TT-017-OT?
  97. PP 2A3 Fixed Bias
  98. RL12P35 convert to el34
  99. Statistical regulator from VA 4rd edition
  100. Matching Impedances (the Math behind it) Please Advise if you have a grasp. Xfmrs etc
  101. Help 6AQ5 pushpull
  102. Valve heater question
  103. Phase inverter adjustment - Fisher 80AZ
  104. Repurposing a Bogen CHB-35A
  105. SMPS
  106. Interstage and bias failure
  107. Grid 2 current for GU19-1
  108. 6x5 tube
  109. IT coupled 6BG6GA
  110. Mystery noise has got me baffled
  111. Dynaco PAS: too much liposuction?
  112. LP Tape Noise
  113. YAKOV ARONOV MA-100
  114. Help for balance-tone control-mode selector bypass
  115. Design of transformers for valve amplifiers
  116. Opinions please: seeking a first class DIY SET amp design
  117. PSU for 6N6P
  118. HOT B+ capacitors!
  119. Analog meter monitoring HT supply
  120. Lamm LL2.1 DC Offset problem
  121. 6L6GT/6SJ7 Valve Amp DIY
  122. BHExchange for BottleHead's
  123. 6BY5GA elevated heater question
  124. Tone controls
  125. EL84 "IP" questions
  126. KIT Single ended KT88
  127. HELP needed - LEAK Varislope 2 Stereo + Stereo 20 with pictures...
  128. All tube cap tube amp?
  129. 12AX7 preamp for DAC
  130. Grid resistors -> GND
  131. OTL headphone amp distorting & clipping: weak power supply?
  132. Broken bias resistors (Yaqin MC-10L)
  133. Tube Enclosure suggestion from Europe.
  134. Benefit/SQ of tube stage at the input of ss power amp
  135. Is 6907 and QQV03-20A tubes are same?
  136. Found some chokes
  137. 6SN7 at low plate currents
  138. 12AU7, 12BH7, Darker Less Bright Option
  139. Heater current effects
  140. Not using all the sections on multi-section cap
  141. DC heater supply dies on me
  142. 1972 Leak Varislope 2 Stereo
  143. OPT secondary ground, stacked supplies
  144. OTL for HeaPhone
  145. Voltage doubler and filament supply
  146. Please suggest me a 6V6 class AB amp
  147. Need Review of wiring up of this SRPP 6AS7 tube amp
  148. Hum in a triode 1H6G...help !
  149. 40w Class A PP KT66?
  150. My new small amp EL84 SE Triode
  151. tube preamp output impedance
  152. pete millet 807 amp
  153. Lost Negative Bias-Fixed Bias
  154. Aikido ('dead quiet') output impedance
  155. Looking for lineamp buffer schematics
  156. Nagra VPA 845
  157. How to match 6C45?
  158. Yet another question about cathode bias (led+pnp)
  159. What replaces an IN541 diode?
  160. Bottlehead Eros or Tube4Hifi PH16
  161. Psvane 2a3 T Mk II reliable vender
  162. Odd Wima cap markings
  163. Chinese Amp kit experience
  164. Considerations about headph. OCL
  165. Trying to solve a Plate Follower Problem
  166. Footprint Noval ECC83 Altium
  167. Interference in hybrid amp
  168. wiring DHT filaments with center tapped secondaries
  169. B+ of Curcio Daniel II
  170. Stepped Attenuators Questions
  171. Noisy Ground? (Probably not a loop)
  172. New Production Telefunken
  173. Tube horizontal mounting position
  174. "Ask Jan First" parts website in Germany
  175. EZ215 Stereo 5881 Amp Project
  176. CCS help dn2540 send 340v to the chassis
  177. That's What She Said RH84 Build Log
  178. Help figuring out this output transformer.
  179. 5881 PPP Cathode Bias B+
  180. Measuring DHT filament V with minimal effect.
  181. 100hz hum with Audio Research vs-55
  182. Volume potentiometer
  183. Driver for 2A3C
  184. Regulated B+ sounds worse?
  185. Sylvania console amp rebuild...
  186. E130L Micron
  187. Question Re: Ground Loop Breakers
  188. Source for D3A/7721?
  189. ID a salvaged choke
  190. Magnetwire gauge size converted to metric
  191. ccs what is the best way
  192. parafeed test/measurement setup question.
  193. how do balance pots work?
  194. Issue with parafeed in SPICE
  195. GU-50 Dissected
  196. Need help on ground wiring for Scott 222-B
  197. Heathkit A9-C Mod
  198. Need a 240v, 5vac - 6-10A rectifier transformer
  199. Free Canadian Westinghouse Receiver #101: Super Heterodyne
  200. 6AS7 SET amp discussion from Photo Gallery
  201. DHT 100hz hum
  202. HP 8903B and Pete Millett's Software Problem ?
  203. How to identify an ARC D70 version ?
  204. Valve amp first build - questions
  205. Transfrmer Impedance Question
  206. Disappointing results from RH84
  207. Anyone Loose a Counterpoint SA-5000?
  208. Installing a 610 in to a B&K 500
  209. My first tube preamp (4S)....
  210. Recycling old iron with stiff wires.
  211. 6EM7 as driver... help !!!
  212. changing R1 value in SE amp
  213. Heater CCS makes for low voltage
  214. DHT & Indirect on same line?
  215. Which tube preamplifier kit for LM3886 amplifier?
  216. budgie pre-amp
  217. ecl82 class A pp, need schematic
  218. Input low pass preferred method
  219. cary SLP50A
  220. se output options for single/balanced tda1541
  221. FM noise in Fisher 90-T in FM mode
  222. ST Triodes?
  223. TUBECAD SE.
  224. RH84 build with SS recto and voltage doubler (any input?)
  225. Tube identification
  226. Brand new cap overheating - argh
  227. High Power Valves
  228. HIFI world 6080 se
  229. EF86 triode question
  230. Connecting a Headphone Jack to a Preamp
  231. PSE 300B "French connexion"
  232. Making a custom tube characteristic graph
  233. 300B DRD power supply
  234. Insanely High Common Mode Voltage Shunt Measurement
  235. Heathkit AA-151 troubles
  236. Tube Power supply question...
  237. Noob question on power transformer primary input voltage
  238. Dynaco ST35 testing for a blown power transformer
  239. 6n6p tube buffer
  240. Welborne Labs
  241. GU-50 triode
  242. Help track down noise in gyrator
  243. Earphone Amp Improvements
  244. Protecting Wire
  245. 45 SET : tubelab vs get*set*go vs ?
  246. 6SL7 in Maggy 175 amp...
  247. Heater soft start for series-connected preamp valves
  248. low/no gain follower
  249. Data for 6BD2A or 6BD2
  250. isolation test

Content Relevant URLs by vBSEO 3.3.2