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. GM-70, A2, biamping
  2. Espressivo Headphone Amplifier on Budget
  3. Coupling Caps for Aikido ACF Buffer
  4. How to compute current at control grid of power tube?
  5. High voltage SS output, any experiences ?
  6. Back on the forum after a long hiatus 6SN7 Preamp project in the works.
  7. Look for Single Tube scheme
  8. Cathode follower amplifier, push-pull, xformer-coupled
  9. help with "bruce heran" el84 amp S2
  10. Triodes and current flow
  11. Heaters Constant Current Regulator
  12. Driver Tubes: Help Me Decide
  13. Possible tweak
  14. DHT Driving Pentode Output Stage Question
  15. 50C5=50l6; 12av6=12at6
  16. Any experience to drive 805 tube?
  17. Fixed short in a 45
  18. power amp current
  19. Phase inverter/power section
  20. Concerned with current dual 5U4's...
  21. What tube is this?
  22. Signal tube noise!
  23. McIntosh Goodness From Scratch
  24. Marshall Amp strange wiring
  25. Fisher Output Transformer ID
  26. Stepped Attenuator for Air Tight ATC-1
  27. Caps .
  28. The Tube Killer Killer?
  29. Martel FAX-200C
  30. 6n6p headphone amp
  31. 2 caps vs 1 (adding low value teflon to pio)
  32. Ouput voltage of a triode stage on quiescent state should be zero?
  33. Hum Ho
  34. build a OTL (output-transformerless) amplifier
  35. 6v6 PP maggie with Polk SDA 1C
  36. Stromberg-Carlson AU-32 distortion in preamp
  37. Please Help - LF Peaks/Dips & Clipping
  38. Anybody watching this?
  39. Trying to find an unusual schematic posted here this Spring
  40. If you were going to build a OTL?
  41. Protecting a valve variable LM317 power supply
  42. EL34 PP PROJECT
  43. Matching tubes for PP
  44. Calculate triode strapped characteristics from pentode data?
  45. 6922 Loading Question
  46. corrections for LF and HF peaking
  47. 300bSE journey under way
  48. Why shielded tubes
  49. Aikido LV 6N27P SMPS completed
  50. Tube PS question: Acceptable ripple
  51. Back at the 45 SET
  52. Time to replace my 50 year old filter caps...
  53. Amazingly low distortion -- Radford-based design
  54. To ground or not to ground the OPT secondary, that is the question
  55. Ultralinear Observations and Questions
  56. FEEDBACK DELAY TIME
  57. 6SN7 v 6N8P v 6H8C
  58. NOS radio parts awaiting for my pick up!
  59. Toroidal Transformer Cover
  60. VTV 6sn7 line stage project
  61. can something be made using these tubes
  62. Help! Need tube tester info for 6CW4 Nuvistor
  63. Hampton MC preamp
  64. J-fet - tube DAC analog stage
  65. geloso 3270 power amplifier
  66. Belton micalex tube sockets any experience ?
  67. DeathTrap 500 - An Engineer's approach to the 300B SET
  68. My First Power Supply
  69. 5aR4 Rectifier Problem, Help! Little Long
  70. Electrolytic vs Polypropylene cathode
  71. Size of 5Y3 tubes?
  72. 3C24 really is a fine output tube...
  73. Yaqin MC100B Newbie Questions
  74. JE simple 45 SE grid leak resistor question
  75. 26 vs 27
  76. Bypass the tone control
  77. CCS with VN2222L
  78. Adding a ground with a 3 prong cable and connector
  79. European Made 6080/6AS7
  80. PFL200, what can I use them to?
  81. 7W7 tube - how it competes with other pentodes as driver?
  82. 1959 Blaupunkt receiver capacitors -Newbie
  83. i have one 5672 tube (new)
  84. 12ax7 pre amp + solid state power amp
  85. Preamp for Tim Mellow's 6C33C OTL
  86. Power supply buzz
  87. How to make a PCB with 15 years old Positiv 20
  88. Circuit query
  89. 845/211 driver circuits
  90. A question about the Malanz 7
  91. Looking for four KT90 Ei
  92. Dynaco PAS transformer breakdown
  93. where do you find your tube treasures
  94. 5670 Thoughts?
  95. looking to build or buy a cheep preamp
  96. Trying to achieve 25-30 watts... help please!
  97. RCA Reel to Reel Conversion??
  98. AA5 Tube Radio Design using 2010 Techniques
  99. I found a use for surplus tubes
  100. Edcor CXPP-30-MS-3.8K OPT
  101. Which tube does my amp use? 845 or 211
  102. Coupling cap replacement in series?
  103. electronique practique
  104. New PNP HV tranny for anode CCS
  105. tube reliability
  106. Hybrid dreams
  107. Triode Electronics 30W SE Transformer
  108. SMALL SIZE OUTPUT TRANSFORMERS
  109. headphone amp with 7025?
  110. Separation of preamp and power amp
  111. Aikido 9pin with 6n1p and 6n6p as Headphone
  112. PreAmp output transformers
  113. Line-out on tubes
  114. Would this scheme work ?
  115. differential cascode patented in 2007
  116. Question about AMP185 Rectifier Circuit
  117. correct heater wiring
  118. Speaker snap or crack (no pop)
  119. Very long cables
  120. Help! 2A3 SET quit after hot restart
  121. INTEGRATED HYBRID AMP WITH NO LOAD
  122. ECC88 symbol problem in TINA-TI
  123. 12AX7 preamp on 375V
  124. The Blue Velvet Line Preamp with 7193 instead of 6SN7
  125. Increase idle current on my KT77's?
  126. Yet another nutty idea - don't say I didn't warn
  127. Need help calibrating a Hickok 6000 Chicago
  128. need someone to run a sim in PSUD2...my PC is down and my MAC wont runt the program!!
  129. Building an B-15-inspired amp
  130. China preamp Xiang Sheng 768A
  131. RE: Fisher 200 tube amp fuse blowing issue
  132. How do you match output tubes?
  133. Best Dyna ST-70 rebuild kit?
  134. Help with tube wiring
  135. Decided on Gibson GA 20 need layout drawings etc.
  136. st70 problem
  137. Help with info on old valve amp
  138. Exceeding V-heater-cathode
  139. Cayin/Sparks A- 50T schematic.
  140. Looking for Bi siemens datasheet
  141. Transformers, transformers, transformers...
  142. Need ideas for my 6V6 from 1946 Blues / rockabilly
  143. Quasi complimentary output stage?
  144. 4ohm output transformer with 8ohm speaker
  145. First DIY project for a good power Amplifier
  146. Cherry red plates
  147. DIY triode
  148. First post/build
  149. New Transformer Vendor In Belgium
  150. KT88 grid stopper
  151. Connecting valve shields to earth
  152. Shindo MAZERIS BELLEVUS MODEL 454-2xAttenuator-How works this Circuit? 6067+12BH7
  153. Fixed bias failure B+ switch off protection
  154. Who can tell me where to buy Caddock MS220
  155. Uses for Quicksilver Transformers
  156. SE amp problem
  157. EL-34 to 6P3S-E
  158. 6922 sepp with Balanced Gains
  159. What path to choose for Hamonica amplifier?
  160. tubes for these OPT?, pri 1.75Kohm, sec 2.5, 4, 8ohm, taps 20%, weight 4Kg
  161. Turning a 6.3 V secondary into a 5 V secondary on an Antek 2T350
  162. gridchokes/output caps
  163. Can I build an MC30?
  164. Cathodyne: Can someone please help me fill in the blanks ?
  165. help hovland hp200
  166. 6SL7 and 6AS7 PP amplifier, design advice needed
  167. Project: Baldwin Tube Amp...
  168. Power Supply Input Capacitor - JE simple 45 question
  169. Tube output: Voltage or Current source?
  170. Edcor's new E-store website.....finally!
  171. Help complete the 300B schematic
  172. Confusion about a 5Y3GT rectifier
  173. Need advice on 300B circuit
  174. PCB in components
  175. new 6080 dc pp
  176. Single ended to balanced Aikido with mosfets in buffer position
  177. Simple LED power indicator light circuit?
  178. about 83 mercury rectifier
  179. Aikido Zo Calculation
  180. Line out issue - 1965 Ampeg B-18-N
  181. Pavane/ Psvane 845, 805, 211, 12AX7, 12AU7, 12AT7 and EL84
  182. Is this Telefunken fake or OEM?
  183. About Hmmmmm
  184. PRE-AMP PROJECT SRPP + HEADPHONE AMP
  185. 6BN11 vs 6CB6
  186. Is output stage local feedback necessary?
  187. Tube Longevity
  188. Power triode drive current requirements
  189. OPT Selection Question
  190. Recommend me a 6V6 P-P schematic
  191. Requesting advice on a pre-amp build. I'm working on asking realistic questions.
  192. So, im going to replace the Alps with a PEC...someone help?
  193. 13e1 se "shade" some questions
  194. Pio russian capacitor K42-11...is good ?
  195. My first build VTA ST-120
  196. World Wide Audio, model: HBP-97a, Hybrid Power Amplifier - info needed
  197. DIY 50C5 mini amp...
  198. So you think you have cool tubes?????
  199. Layout
  200. Looking to ID this amp
  201. Help me to make tube amply
  202. CAT SL1 SIGNATURE schematik phono
  203. Have anyone built this 6V6 amp?
  204. GU-50 in Single-Ended Triode Configuration - What bias points?
  205. DC coupling on a LTP? Opinions and help needed on Fred's design.
  206. Power Selection - Help Needed
  207. Which speaker with a 1/4W tube amp?
  208. 6973 VS 6CZ5 substitute
  209. Third Reich tubes
  210. Hello...and another ST-70 project.
  211. Home theater magic smoke...smoked and I think I heard a mirror crack...
  212. Scott LK48-B restoration
  213. 3 - 12AU7 Preamp. Is there such an animal?
  214. 300b filament
  215. resistor 880 ohms cathode
  216. Anyone have a Bugle Boy logo
  217. Change of circuit from triode to tetrode
  218. Need upgrade info for my Atma-Sphere Novacron Amps
  219. Whats Vintage Testing Equipment Do YOU Have/Use?
  220. JJ Kt77 Bias?
  221. tube rectified psu
  222. HELP!: my SET amp was turned off without a load and now it sound veiled!
  223. 5842 grid leak
  224. AMI Jukebox speaker impedence question
  225. Advice Needed: "Flabby" Amp Low-End
  226. Aikido transformer coupled output
  227. Audio measurements on tube amp. ? look here
  228. 12BH7A driver stage help
  229. Audio drive to g2 connected to g1 via 15K0
  230. KT88 SE Complete Kit
  231. Any high-end 6BM8 push pull tube amp schematic ?
  232. How a Triode Works
  233. EL3N substitute
  234. Magnavox AMP-185
  235. Best 6V6G that won't get me divorced..
  236. Shorted EL34 ?
  237. ARC VS60 hum in speaker
  238. Need help for a bias circuit
  239. Eico HF20 Output Txr Questions
  240. A Radford STA15 restoration story
  241. Tube Testing in DC Area
  242. Thorens PR24
  243. Newbie here with a couple questions
  244. 300B SwitchMode filament supply
  245. Mixed bias for balancing unmatched tubes in PPP?
  246. My First DIY Experience: An Aikido/Tetra Preamp
  247. how to test chokes for current and voltage
  248. pictures miniblok 1 and miniblok 2 by fred nachbaur
  249. Help with Aikido Preamp+class d amp
  250. will a PTX without center tap work?

Content Relevant URLs by vBSEO 3.3.2