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 99 100 101 102 103 104 105

  1. Replacing electrolytic caps
  2. Heater supply for the 866a
  3. How good is good enough when designing a line stage?
  4. Cathode/plate resistors ??
  5. Tubes and LTspice?
  6. Is this an oscillation problem? -broskie CCA linestage
  7. Simple Octal SET help.
  8. Capacitor Sanity Check
  9. VTVM substitute?
  10. Caps - Mundorf Silver/oil vs silver/gold/oil
  11. What music/sound style for 845 tubes?
  12. Advice Needed
  13. Favorite ouput tube (SE only)
  14. Best make of audio valves/tubes
  15. How to calculate source impedance for audio transformer?
  16. Schematic for REDDi DI-Box?
  17. what the best kit for Dynaco
  18. That mystery trem cap
  19. A Hot Rodded Bottlehead S.E.X. Amplifier
  20. Cheap Chinese amps
  21. Wanted: Leak ST-50 Mains transformer 240V
  22. Who makes their own OPT around here?
  23. 71A
  24. Sound quality chinese tube amplifiers
  25. freeware circuit simulator for Osx (Mac)
  26. 12ax7LP substitute
  27. RH84 SE Build and custom Edcor power transformer
  28. 6l6 se primary impedance choice
  29. Luxman SQ38FD mkII, schematic
  30. 6c33 SET (my next project). Need some feedback
  31. Amorphous iron UMCCC-125: what would you do from it?
  32. Old Fisher SA-300 Amp help!
  33. What kind of sound does a noisy 12B4 make ??
  34. KT88 bias current keeps drifting
  35. Oddball Tube - Useful for Audio??
  36. 12AX7 dual triode "Signal Enhancer/Conditioner"
  37. 2nos of 6l6 in Parallel SE mode
  38. Output transformer selection
  39. 5C8S rectifier psud2 modle/rectifier information
  40. EF80 / KT77 SIngle Ended
  41. Longevity of output tubes in triode vs pentode
  42. ekco ui59 receiver
  43. simple heater question .....
  44. Different Differential Pairs
  45. Decware Zen SET (first project/90% finished)
  46. YL-1200 for audioamp
  47. 7984's
  48. Building First Preamp HELP
  49. Aikido All-In-One Octal B+ measurement.
  50. OPT PP for GU50 Triode ?
  51. Requesting input on preamp schematic
  52. Longer life 6CA7's for class A
  53. Organ split
  54. Two amps done and done!
  55. Testing the 5842/417a on Sencore MU150?
  56. Tube ID
  57. How to best drive an 845?
  58. K-16ls + ton pcb (just finished pics)
  59. Helios + Pultec tube EQ rack prototype.
  60. 12ax7 preamplifier with modified power supply!!! please help!
  61. tube amp prototype with pc
  62. Looking for a new diy project
  63. To James or to Baxandall?
  64. 45 triode : max 275 or 300 vdc ?
  65. Anyone with experience breaking in capacitors out of circuit?
  66. Vt-64/800 tube amp/preamp
  67. Hammond 1609 Output Transformer - EL84
  68. Chinese Capacitors
  69. 60 Watts A Channel 6528A Tube Amp
  70. AC or DC heathing?
  71. 1000W tube amplifier
  72. LEDs or RC?
  73. Is this amp worth bringing back to life?
  74. Melody PM845
  75. Need help troubleshooting this integrated.
  76. Wanted...design for D3a triode strapped driving 45
  77. Removing Tone Controls from VoM Preamp/Amp
  78. Philips 8580 useful anywhere?
  79. output transformer info
  80. 100Hz square preamp responce help
  81. 6P21s 6n21c tube, True Direct Heater?
  82. Convert Dogzilla for Hi-Fi output
  83. Bogen AP-35 Static and Pop from one channel
  84. EL34 PP triode mode hums
  85. Rectifiers
  86. Yaqin MC 10l problem
  87. Stripping Edcor's powder coating
  88. 5Y3 with slow warm up input and output tubes
  89. power transformer question
  90. DHT heaters . and their property"s
  91. Power Tube Cathode Resistor "distance"
  92. Does the same output power from tube amp and ss amp have difference?
  93. 32 Channel Microphone Preamp
  94. Field coil questions
  95. MC240 found in a shed.
  96. "Impossible" circuit which seems to amplify anyway.
  97. EL84 driving EL84 SEP
  98. Tube buffer for MosFet Citation 12
  99. Building a better power Triode
  100. Original KT88? or not
  101. Moscode 300 Upgrade
  102. Onwer's Manual for Realistic SAF-24D
  103. 2 stage Stereo/4 Stage Mono Triode Preamp with independent drive control & inverters
  104. 6J4 Experiment!
  105. Anyone build Broskie's T8 OTL?
  106. Just WHY are DHT tubes SO Expensive....?
  107. Two chassis grounding
  108. Tubes vs. Caps?
  109. Impedance and output transformer selection question
  110. Preamp tube SRPP 12AU7 VS preamp tube Aikido 12AU7 = all use rec 6X5GT
  111. Stark 9-66 tester repair
  112. What kind of tube did I use back then?
  113. Wanted: Vacuum Tube Phono Preamp for PAS
  114. Lower gain in YS Audio linestage
  115. Converting 12FQ8 for 12AX7 , HELP !!!
  116. Transformer Inquiry
  117. Pitfalls of paralleling different resistor brands?
  118. Question about rp and the AC load line
  119. KTA-HiFi ST-70 pcb or marantz 8b. HiFi build
  120. What is it about SET's?
  121. The Russian Connection - (Maybe) A build thread. (KT88 SEP)
  122. A small help with russian low voltage tube
  123. Acoustic (not Audio) Alchemy Labs
  124. Mullard 404? ECL82 amp
  125. OP & tube power transormers
  126. EML 300B-XLS Schematic?
  127. Experiences with TAD EL34?
  128. C3g simulation model
  129. ok maybe im just a newb when it comes to amps but...
  130. Yet another compactron to play with...
  131. Weird heater arrangement 12ax7/6bm8
  132. I love SET can we fix what I hate?
  133. Tony's 6H32 pre-amp
  134. To tone control or not to...
  135. EL84 plate voltage.
  136. 6bx7
  137. Anyone in the L.A. area with scope willing to troubleshoot?
  138. Transformers in series OK?
  139. Russian 6CA4/EZ81 Equivalent?
  140. Amp build recomendation.. for Frazier model sevens
  141. How can I make a DIY AC probe for my DMM
  142. PSUDII Question
  143. EH KT88 Glowing Welds?
  144. Not quite DIY
  145. Searching for a TUBE datasheet GE GL-421
  146. 6EM7 Unit 1
  147. woohoo! RDH4!!!
  148. VTL hum
  149. Use CL-90 to slow 5Y3?
  150. Allen Wright, 1947-2011
  151. Octaves/Ghost notes from Bogen K10. Caps?
  152. Q1, 300B S-Splot, 360V 60mA? Q2, James 6112HS or 6123HS?
  153. What audio output xfmr for a 6BM8 pp amp?
  154. Parafeeding an EL84 SE(T)
  155. Interesting video from the production of KR tubes
  156. Gassy WE 300b
  157. Bogen Pa Identification 6l6 x 4 dual rectifier
  158. SE output transformer DIY
  159. Tektronix TDS714L or other Tek TDS series digital oscilloscope for stereo?
  160. AA 151 or Scott 222
  161. Toroidal Output Transformer
  162. Hytron HY615 Data ???
  163. Can I use a 12AX7 with CT 6.3V?
  164. torroidal power transformers
  165. What amp is this
  166. B+ ramping up before CCS filament - danger?
  167. Recommend a good plate choke for 26 tube!!
  168. S11E12 TUBES
  169. Low dropout 6.3v
  170. how to adjust the filament power ecc83
  171. Cary/AES - AE3 Linestage Help Needed !
  172. 5867a
  173. 6V6/12AX7 Project Question/Help
  174. Ultra Linear Push Pull Tube amp
  175. A little help with 6v6 screen needed.
  176. Output Transformers... Decisions Decisions
  177. Need Help. PSU not voltage down from design
  178. D/A preamp FFT measurements for review plz
  179. Type 40, 12A, 112A(syl)
  180. American Audio Picker
  181. one half of a tube in schematic????
  182. estimating power rating of Telefunken transformer
  183. Where is mistake??
  184. Building a 6s45P amp - transformer help
  185. High-End preamplifier with ECC82!
  186. Attempting to recap a couple of old Ampex 2010 suitcase amps
  187. Hi specs rectifier needed
  188. Lux 6056N Intertstage Transformer
  189. Aikido Line Stage / Buffer
  190. JJ KT88s and other octals
  191. Triodes from Russia
  192. Little help needed / do I have a bad tube or really good tube?
  193. 5.1 channel 807 SE amplifier
  194. Plate loaded 6N6P over SRPP 6N6P any day of the week...
  195. Voltage multiplier vs transformer for preamp HV power supply
  196. does tube bias drift like silicon devices
  197. What are the best pots for less than $50 each?
  198. Best EL34 For Triode mode
  199. ASL AQ 1002 PP KT88 problem with input stage
  200. 2A3 Amp schematic suggestions?
  201. what I need for safe use mercury rectifier
  202. Anybody listened to Glow Audio?
  203. Tubes too close to output transformers?
  204. Help with stereo to mono for project
  205. MC3500 with 807 tubes and modern driver tubes
  206. Multiple Film Caps in parallel, Problems?
  207. I need a project......preferably a HIFI amp..........
  208. Aguilar DB-900 question
  209. REN904 for linestage?
  210. Urgent advice on Chinese purchase please!
  211. VR tubes, minimum current
  212. Senior Project Tube Preamp
  213. Antek AS-4T430 measurements
  214. small, light dc coupled 6ea7 amp sanity check
  215. 6S33S SE Transformer Set
  216. I think I blew my amp!! plase help
  217. Genalex VS Mullard 12AT7 & 12AX7's HUGE DIFF?
  218. testing 6550's on a Hickok 539b, same as KT88?
  219. 9V tube drive pedals - worth it?
  220. Music Angel XD-850MKIII 300b integrated amp
  221. 8150's
  222. More junk from China
  223. 6GM8 above 8mA/24V
  224. One Tube Sound Better Than Four?
  225. HK Citation V rebuild - any advice?
  226. 6GM8/ECC86
  227. Sound Valves vtp-101 Schematic
  228. ~17-18w sweep tube with large plate cap
  229. Fisher 500B Comparison
  230. New build of P-P PCL86 Amp
  231. Transformer question
  232. Can 110V Quad IIs be configured to 220V?
  233. Advice needed re repairing Audio Research VT100
  234. Yaqin SD-CD3 Tube Buffer - upgrading caps
  235. Best value speakers
  236. Gyrator PSU's in tube amps
  237. EL34 Amp Running KT66, Safe ?
  238. MJ Optimized Valve Regulator
  239. Need JAN 6418 tube stereo headphone preamp kit advice!
  240. Electronic choke
  241. Can you please help identifying this amp?
  242. [TubeAmp] Beginner's questions
  243. .47uF output cap to 1uF?
  244. Spark gaps on output transformers
  245. St 35 or St 70?
  246. Pi wound output transformers
  247. miniatures 6n1p 6n2p
  248. HK Citation V schematic?
  249. Help! can't find ef86 on my Hickok 539b roll chart! and need a tube project
  250. Physical Oscillating noise from phono stage

Content Relevant URLs by vBSEO 3.3.2