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. Looking at more preamps........
  2. Help me to improve my 6n6p/El34 UL...CCS/AnodeChoke/Transformer ?
  3. Darkvoice 336 tubes
  4. GU-50 opt in europe
  5. OPT on Ebay, any one know or use this?
  6. VTA M-125 mono block kit.
  7. 6V6 Regulator Issue
  8. Tube phono stage build
  9. First valve amplifier, tunings!
  10. Looking for 7N7 preamp schematic
  11. Line Magnetic LM-216 -- Annoying Hum
  12. Anthem Pre2L Special Edition...tubes?
  13. 6550 tube compatibles?
  14. Dynaco VTA ST-120.
  15. Tube amp help
  16. Transmitting tubes eg; 805 datasheet, Rp, gm, mu?
  17. 300b selectable ac or dc filament supply?
  18. Russian 6J43P-E(6Ж43ПE) Dual anode pentode....
  19. suitable 1:2 opt for a headphone amp
  20. Primary impedance, which tube?
  21. Dual-control, sharp-cutoff pentode
  22. Big transformer for little project?
  23. Entry in to DIY Tube world with 300B SET Kit
  24. Dynaco ST-70, Original or Mod?
  25. Damper diode as delay
  26. Thoughts on this design......
  27. Output Transformer Question
  28. Feedback on Andrea Ciuffoli's Extreme Hi-End Hybrid Amplifier
  29. Help troubleshooting oscillation
  30. Audio Research VS110
  31. Re-activate getter/save gassy tube
  32. What does 40% screen tap mean for UL OPT?
  33. Which pentode mode is this?
  34. ST-70 Power supply questions
  35. 3 stage DC - any thoughts?
  36. Help to choose the right EL34 schematic
  37. Russian tubes - Classification of various brands?
  38. hot bias- actually hot?
  39. POT between EAR834 phono and power amp
  40. Matching 100 tubes ECC803S
  41. EL34 Single-ended Class A tube amplifier KIT
  42. Help to de-bug a 6AH9/mosfet concertina driver
  43. How is this possible??
  44. 10k power tube load
  45. Phonola Record Player TK 2146
  46. Anode Bootstrapping
  47. basic line stage testing
  48. Question about power transformer choice.
  49. Separating power supply with SET amps
  50. Weird EL84 and 6p14p-k tubes
  51. genuine 6P14P-EB?
  52. Power Transformer for OTL Headphone Amp
  53. Magnetic relay to drive with small-signal tube
  54. rj6 coaxial cable to wire the input connections to the input/driver tubes?
  55. Noob question: one channel is dead; safe to swap tubes to troubleshoot?
  56. Little 6BQ5 am squealing....HELP
  57. output trans for input trans
  58. Emulating Ultra Linear Mode
  59. Mullard 5-20 and logarithmic passive volume control: how to connect ?
  60. Chinese EL34B SE "A10" Disection
  61. indicator light using filament 6.3VAC voltage
  62. 6p42s tubes
  63. Type 79 Tube Question
  64. Preamp for 6N3 tube
  65. In praise of Tribute Autoformer Volume Control
  66. 12AE7 Automotive Tube Amplifier
  67. Using a LM317 for setting tube bias
  68. KT120 LED bias?
  69. Tubes with different mu in a cathode follower
  70. Scott LK-48 stock?
  71. Troubleshooting question
  72. Constant current load for testing power supplies
  73. Push Pull Parafeed Headphones Amp
  74. Grommes 20PG8 Amp Motorboating
  75. Anyother tube with same pinout than 6CG7?
  76. Calculating coupling capacitor values
  77. Help with Welborne DRD 45 amp
  78. GU-50 + solid state driver
  79. ECC82. JJ vs vintage, peculiar frequency response tests
  80. How to Bias Morrison Micro 2A3?
  81. Solid state feeding a tube amplifier
  82. Power Transformer for 845 Monoblock?
  83. 16LS Kit
  84. 12 pin compactron pinout dimensions ?
  85. Mullard 3-3 build oscillation?
  86. LTSpice newbie: why doesn't the EL34 sim properly?
  87. Op Amp booster circuits, tube hybrid
  88. 150K resistor at input. Too high value?
  89. Looking for a book about valve amps (MJ not suitable)
  90. Power Transformer for Decware ZBox
  91. mu-follower for hybrid amp
  92. Quick Question on Grid NFB
  93. Vintage SE output transformer has a G2 tap
  94. Views on a regulated bias supply
  95. Distortion in cathode follower output stage
  96. VT4-B
  97. series heater voltage for 5-channel preamp
  98. Tube Technology Unisis Information
  99. Newbie with k-16ls
  100. can i run parallel se 300b's off one supply winding
  101. volume fluctuation on tube amp
  102. The chassis, to ground or not to ground.....
  103. Substitute for RCA 841 driving 300B
  104. Music Angel
  105. Priboj with other tubes
  106. 211 Melody Platinum amplifier.
  107. Cloning my 1968 stereo.....power transformer question.
  108. DC Coupled EL34 Biasing - Help Request
  109. K-12G Tube amp Hum at low volume
  110. SE 6c33 Amplifier OPT overshoot/ringing oscillations
  111. Dynaco MKIII issue
  112. "SRPP" 300B Headphone Amplifier
  113. LDR's in the Marantz 10b
  114. Shuguang Treasure CV181-Z Lifespan in hours?
  115. Need to help to understand using 6x5 as half wave rect
  116. 300B plate voltages
  117. Mullard 3-3 power supply
  118. Best path into diy hifi tube audio
  119. 801A PP or 2a3 PP
  120. Shuguang Treasure tube genuine source?
  121. Passive RIAA with 6F12P and 6N5P
  122. ANDREA a Democratic hybrid amp for luxury sound
  123. Quad II classic output transformer
  124. overheating 10w resistor in power supply
  125. Strange EL34BW
  126. Scott LC21 tube hums when hand is near
  127. Heater Elevation & Dual Rail Power Supply
  128. Request for help with Wavebourn's SVCS
  129. Lundahl LL1682PP suitable for 300B PP amp?
  130. Modding input of EAR859 to feed output for Bi-Amp?
  131. Voltage gain triode
  132. Excellent midbass performance
  133. 6SN7 Mu Follower problem in distortion
  134. 6N7's in phase inverter service
  135. Going to Amberg Germany and Graz Austria, Any DIY-ers in the area have time to meet?
  136. Mullard 3-3, wrong power transformer
  137. Tube hybrid vfet
  138. 12ax7 + 12au7 strange behavior
  139. Hybrid amplifier with 6SN7 or 6SL7 tube
  140. Dynaco ST70 midrange glare
  141. Request review of my schematic
  142. 12AX7/12AU7 Williamson-style front end
  143. No-Vacuum Diamond Triode Device
  144. 6CB6 pentodes and 12AU7 twin triode to replace 7199 in major SCA35 rebuild
  145. miniwatt as headphone amp, impedance Q
  146. Fluorescing GU 29 tubes - whats wrong?
  147. SE 6CA7 Stereo Tube Amplifier Pot Hum
  148. Paragon 12A
  149. Need Help with PSU for KT120 / KT150 SE
  150. SE valve tube output transformer clarification.
  151. Poor valves or expecting too much ?
  152. ST-70 vs. Mark IV heater connections
  153. 6H8C Glass Moves
  154. Audio Research LS2BMkII parts identification
  155. Newbie Recapping, Help identifying caps
  156. Suppressor Grid tied to plate and not ground
  157. Picked up a heathkit aa - 32. ....now what.
  158. EL34 Internal shorts
  159. Questions about this EL34 amp design
  160. Troubleshooting 6550 Jadis Clone
  161. Help the newb: cathode to heater shortage
  162. Diy tube amp recommandation
  163. Bogen Presto Challenger AC220 Stereo Amplifier
  164. How to parafeed 811a from this schematic
  165. Help me to understand a simple bias question...
  166. Poinz Musical Machine - which class is it?
  167. A question on tube rolling
  168. Small tube stash - whats useful?
  169. Parallel triodes, single output question
  170. EL84 red plating
  171. ECC83 self-bias test circuit, weird mesurements
  172. AIKIDO
  173. vintage electronics kit
  174. Revox 40 tube amp 4 x ecl86
  175. DIY Preamp Issues
  176. 6n16b operating point
  177. Pete Millett's MAGIC BOX (6BN6 tube)
  178. Need confirmation if my schematic is good at all. It uses 50L6 as a stereo hi fi amp
  179. Chinese 6SN7 300B SE Amp - need help to tweak
  180. Kondo KSL-M77 heater regulator?
  181. Quad II issues
  182. THD measurements keithley 2015 integrated anp
  183. SRPP #56>D3A>EL 156 SE Build.
  184. webcore schematics???
  185. Purpose of LC Circuit going to Output Transformer?
  186. 12ax7+12au7 for DAC i/v
  187. Eico 666 settings for 5670
  188. transconductance conversion
  189. What is the pressure inside a mercury rectifier?
  190. Strange distortion value?
  191. Glass Ware and Pass
  192. Is over or undervolting bad for amps?
  193. Mod an EICO ST-70 or HF-20 into FISHER KX-200?
  194. Paralleled 12AX7's for phono stage
  195. Drive
  196. Telefunken Princess II 5486MX transformer question
  197. DAC in the Amp?
  198. Tube data for the 9AM10
  199. 5687 headphone amp
  200. Marantz Model 9 Prototype.
  201. Motorboating Tubes
  202. Mc Farlow f1mk2
  203. Global Matching of Great Tube WE300B, WE417A...etc
  204. What to do with unused half of triode ?
  205. Dynaco Mk III output transformers
  206. Gu-15
  207. Making a console stereo to a speaker amp?
  208. Strange valve pre amp on ebay.
  209. 833A "budget" design
  210. FU50 tube amp mods and schematic
  211. Tube type W1039 (subs NR27/A or CV1161) - Needs Datasheet, curves and/or info (any)
  212. Audio Research SP6B
  213. VTA PH16 Build
  214. What tubes to use with this Interstage Transformers?
  215. Questions and Problems with Mullard 5-10 clone
  216. semi scratch build; pas 3 board and pwr supply
  217. SHIII project, Dual-SE
  218. Battery bias and negative feedback
  219. schematic/kit recommendation for low gain output stage
  220. Help identifying OPT
  221. Getting Started On RCA Console I picked up
  222. Er, what's plate voltage?
  223. 6SN7 DIY preamp suggestions
  224. Hybrid 5.1 SURROUND Tube preamp/Mosfet Amp
  225. Where is the problem in 211 tube power amp.
  226. An Unusual SE Bench Amp
  227. HK A500 restoration log
  228. How many grid stoppers do I need ?
  229. Bogen Console Revamp
  230. Anyone guy with experience in turret cascode TV tuners
  231. Phono stage with remote transformer?
  232. Need help troubleshooting Yamamoto A08S Kit build :-(
  233. Curcio Audio status
  234. Thorens AZ-25 restoration
  235. Question about slew rate of CCS for cathode bias
  236. ASUSA K2003
  237. Good Gravy, This Thing Is HUGE!
  238. Those Pesky triodes
  239. 310A tubes.. Country of origin
  240. Speaker for EL34 SE amp
  241. Advice on power umbilical connectors
  242. Matching valves
  243. output transformer new vs vintage iron
  244. Looking for Dynaco ST-70 Power Supply Info/Specs
  245. Parallel GM70 Amp
  246. Bad repair jobs
  247. 8mV of noise causing havoc in valve pre amp.
  248. Simple 12AX7 gain stage loss of HF - impedance?
  249. 6N7/6CB5A Amplifier - Part 1?
  250. 12AU7 Valve output impedance.

Content Relevant URLs by vBSEO 3.3.2