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

  1. Still not sure where to start
  2. Will cooling fan extend life of old caps & transformers? Or just make worse w dust?
  3. RCA tube amp woes/hum/ground
  4. EF86 microphony
  5. John Broskie Kits
  6. Refurbish Conrad Johnson Premier Eight
  7. 4tube Philco amp project...
  8. Thoughts on bias for PPP
  9. 2012's Acquired Parts- ..Custom Build Anyone?
  10. Can I use a variable voltage cieling fan switch as a variac?
  11. Audio research LS2 hiss and hum... need help
  12. saba electro sound
  13. Ra on C3g and 6C45pi?
  14. Partial Feedback System
  15. An Electronic Loss Compressor
  16. K-12g one channel louder than the other
  17. Sun SV2a3 or 45?
  18. Red imP(asse)
  19. An application of C-Vac: the SolidGlass amplifier
  20. Fixing crooked laminate stacks?
  21. EF184 driver
  22. Woo Audio WA7 temperature
  23. Resistor w/cap or LED or battery bias?
  24. Transformers Back to back vs. Voltage Doubler
  25. 211: 75W or 100W?
  26. Does really need a balanced preamp ?
  27. Power Transformer Hum
  28. Options for how to use this old tube PA amp? > 200W
  29. Flash getter question
  30. Heath W4 Output Xfmr - anyone measure one??
  31. Tube buffer with 6n3-EV
  32. First time with hi-fi, need some advise with amp desing
  33. Newbie wants to build SET 6C33C
  34. Another PP GU50
  35. SE Waveform
  36. Problem with CCS for filaments
  37. UL / Distributed Load - Screen vs. CFB Winding Ratios
  38. 50W PP - KT88 Build
  39. OP Tx and PPP to PP change over
  40. I need a little more advice on a Glassware Janus shunt regularor
  41. Pentode noise
  42. Dynaco ST-35 Circuits
  43. BIG Transformer Covers - Where to Find?
  44. Amplification breaks up after some time
  45. 6A5G schematic; changes from the 6Y6G tube
  46. ECC83 differential preamp optimisation
  47. 6Y6G SE SCHEMATIC NEEDING HELP!
  48. Need help identifying this tube...
  49. AMI DD project. Someone did some mods before me and I don't know whats what.
  50. (v?)Tailor PA-500 Tube Amp
  51. Transformer arrangement?
  52. Don't be stupid, you can't possibly do that with output transformers?
  53. Maximum Plate/Screen Voltage 6550 in UL
  54. Paper insulation for output transformers?
  55. Best PP OPT 30-100W range
  56. Tripath TA2020 + 6N3 Tube buffer
  57. El34 as triode
  58. tube preamp vol ctrl -- before or after?
  59. matisse preamp -review
  60. Ribbon Microphone Preamp
  61. Looking for tubes 6CL8 pentode Triode with lower output ratings
  62. Reducing Signal Level Without Affecting Tone
  63. VTVM/VOM???
  64. Micro amp - all-tube, direct heated, portable and IT FITS
  65. Wiring a 6AS7G to be Push Pull within its own envelope
  66. Wima MKP
  67. Will this circuit work ?
  68. new amp build
  69. MKP DC-LINK vs electrolytic power supply 4 tube amp
  70. Looking for ECC81
  71. Unison Research S6 (old version) auto or fixed bias?
  72. Troubleshooting a restored Edison 12 valve amplifier
  73. Counterpoint SA-220
  74. LTSpice models needed
  75. Magnavox 6V6 amp upgrade
  76. breadboard for tubes
  77. Looking for ideas... 50W OPTs
  78. SE Power Supply PCB
  79. Speakers for the 16LS Stereo Tube Amplifier
  80. will E80CF fit into yaqin 100b
  81. RH84 Rev2 Build w/Premium parts
  82. Single ended KT88 / 6SN7 not enough power
  83. Problem with push-pull KT88
  84. opinions please!
  85. Tube testing 101?
  86. Top aluminum plate from ProtoPanel.com
  87. 6GK5/300B
  88. Screen driven sweep tubes - the return of the evil kink?
  89. Parafeed 45 amps
  90. Has anyone tried the 6p1p EV?
  91. ECC88 mu-follower
  92. Reducing gain of a WE91 type amp
  93. 6sn7 mu-follower
  94. AES Preamp mods
  95. Oh! Darling
  96. Testing 3B22 on Hickok 752a
  97. Has anyone ever used the 6C41C in PP?
  98. RH 6V6
  99. Unholtz-Dickie amp, 4-1000's
  100. Somewhat Newbie..
  101. grounding RCA inputs
  102. ESS9018 I/V
  103. Catode follower with 6N7S (6n7GT)
  104. Recommended RIAA Values for this Circuit
  105. PC board design for PSE amp
  106. Audio Research SP-11 HV Regulator
  107. heathkit SA2
  108. russian 1578 tube production years
  109. partial list of tubes I have
  110. Bench Power Supply Questions ?
  111. Identify this tube?
  112. your input - bulb / led / neon selection for short tester
  113. Potted choke orientation/amp layout
  114. Tamura F-2012
  115. Joining output windings
  116. B&K 650 tube tester
  117. 5687 LTSpice model needed
  118. Can you identify this transformer? 70V line matching?
  119. I had to post this..the 211 in all its glory!
  120. Help with preamp/driver/output setup
  121. Accident - Shorted Cathode to grid!!
  122. Correct B+ for EL84 UL PP
  123. RH807 output transformer....what did you use?
  124. Headphone tube amp with balanced output?
  125. Tube buffer with 6n1p-EV
  126. First little SE
  127. ID Nice Unknown Tube
  128. Bell and Howell Model-601
  129. what should my mulit reader be on to bias yaqin 100b
  130. Fixing an old Tandberg Huldra 6 Radio
  131. 30W sweep tube amp
  132. Atmosphère S-40 with KT88, does someone know about this amp?
  133. What happens when Output transformer max voltage (slightly) exceeded?
  134. what type is the best?
  135. Kiwame carbon resistors
  136. Rocker Switch Wiring
  137. RH6550
  138. Diodes for Marantz 8B
  139. Diodes for Marantz 8B
  140. Telefunken 2430 Opus Resistor Burnout
  141. yaqin 100b with 2 different kt88 valves 2 are Genelex Gold Lion and 2 are Svetlena wi
  142. Conrad Johnson MV40 copy and Fisher OP's
  143. Are EF86 Tubes inherently microphonic?
  144. Counterpoint SA-1000 Hum in left channel Pinging Anatech!
  145. Need a rectifier tube...
  146. Looking for Harman Kardon Allegro A-10 Schematic or PhotoFact.
  147. How much spl can a triode take?
  148. Octal CCDA kit - help needed!
  149. Mod input of 6AU6/6AQ5 amp for iPod
  150. Put a tube on your PC just for fun..
  151. ST35 Cathode Feedback
  152. Series Shunt tube regulator
  153. Help ID this tube ^&$**@# lettering!
  154. Adding a db VU meter to an existing tube mic pre
  155. Quad 22 interstage cap?
  156. First test of my AX84 HI-octane
  157. 4P1L triode PP (40W!!?)
  158. KT88 shootout vintage vs new vs 90
  159. Help needed to identify this british made Amp
  160. PSU II Question
  161. Quality tube buffer with ECC83
  162. K12g Amp Question
  163. Stark 9-66 tube tester - repair help
  164. output transfo problem
  165. Pair of Fisher CA-40 Oddballs
  166. Model 601 tube amp.
  167. Model 601 Tube amp
  168. First power amp build. Is this normal??
  169. Compactronized 6146
  170. Preamp and inverter on B7G base tubes circuit.
  171. Advice and Suggestions on Amp designs
  172. Help who tube buffer x10-d
  173. EL803S-6CW5 / EL86 amp design check (schematic attached)
  174. amp buzz in one channel on inrush / power on
  175. SE 8-10W monoblock build help
  176. GlassWare Tube CAD
  177. SMD Parts and the DIYer
  178. 6CW5 / EL86 operating point
  179. RH84 power output
  180. 6n6p-ir
  181. Transformer bubbling
  182. Crackling noise.... pls help on Pre-amp
  183. RH84 amp. Plate is 300V. What voltage...
  184. Amplificator Class A 2 X EL504
  185. Help in testing 12ax7 and 7869 tubes
  186. Micro-Cap Tubes Parameters question
  187. Cathode Bypass Capacitor
  188. NOOB ALERT! sooo omany questions.....
  189. IS THIS A REAL E810F ???
  190. Chassis design question / cooling of small signal valves
  191. 5 leads pp output transformer
  192. Vote and Comment: SRPP vs. Aikido vs. Grounded Grid
  193. NEED ADVICE ON THIS SCHEMATIC AND WILL IT WOFK
  194. Help Identifying a Console Pull Amplifier
  195. sunaudio 2A3 circuit...is it good for newbie?
  196. KT120: When does it starts to sing ?
  197. Simple Time Delay (no more excuses for not having one)
  198. Cary SLP-05
  199. 6SN7 Grounded Grid
  200. input selector switch replacement help
  201. help needed with transformer wiring
  202. Tube Schematic Drawig Packages
  203. 12AU7 - 5V4G easy amplifier
  204. Glassware CCA 9-pin PDF
  205. Replacement for the tube 6922 (ECC88)?
  206. Which probes for my first scope?
  207. PP CATHODE BIAS WITH "CCS"
  208. current output tube amplifier
  209. Tube amp for a small room (newbie-like)
  210. What is this old thing from1929?
  211. Arduino cathode current HT etc
  212. Bizzare Output Transformer Connectivity...
  213. OPT to KT88?
  214. Help needed on identifing tube
  215. Amplifier circuit from tube radio
  216. Amplifier circuit from tube radio
  217. Using Valves Library in EAGLE CAD
  218. Biggest noval power pentode?
  219. Akita 12V preamp thoughts
  220. Help, what is this (Marconi 6204) ?
  221. Anyone try DHT 33 or 1Q5 Pentodes wired as Triode?
  222. Would this be a good buy?
  223. Looking for a complete DIY Tube amp
  224. Schematic by TS LIM Pre-amp
  225. Fisher Model 100 'AZ' Mono Amp Rebuild w/ Oscillations
  226. Measuring inductance
  227. Leak stereo 20
  228. Gain and gm of a QQE03/20 anyone ??
  229. Power supply options for tube amplifiers.
  230. CCS question mA
  231. Help wanted with testing and finetuning.
  232. YAQIN VK2100 pre amp
  233. Identify record player and valve
  234. AC Line Filter
  235. blue flash inside 5Y3GT
  236. Heater-Cathode Leakage
  237. Old Tube Kit
  238. Point to Point SET KT88/6550 Build
  239. D3a - MOSFET HYBRID CIRCLOTRON
  240. Aikido CCDA
  241. output impedance
  242. Bizzaro fix for hum problem needs explanation! Pretty Please
  243. Bizzaro fix for hum problem needs explanation! Pretty Please
  244. Questions regarding first build - K-502
  245. Good tube tech in Brooklyn NYC?
  246. Looking for LTspice tube models
  247. Audio Research SP15 : faulty phono stage
  248. Spark 810 looking for the diagram
  249. HP 8903B Question ?
  250. 1955 Hammond Organ Tube Amp

Content Relevant URLs by vBSEO 3.3.2