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

  1. anyone have experience with a Radio Craftsmen C400?
  2. Amp-A, a variation to the EL84 Push Pull theme
  3. tony's 6LU8 push-pull power amp build
  4. First Post Here
  5. MFA Lumi sings high-pitched tunes
  6. Power tubes not drawing current
  7. replacing tubes with circuitry
  8. High Voltage Regulators (Maida or zener)
  9. GU-81m tube amp schematics???
  10. Suggestions on SIPP driver stage
  11. How to eliminate the "white noise" for the 300B tube amp?
  12. 6BQ5 UL Curves?
  13. Looking for simple Schematic of 2A3 or 45 or 26 Headphone Amp SE OTL ? anyone ?
  14. 6N1P and 6N6P OTL headphone amp
  15. New Project
  16. Understanding Steve Bench's regulated power supply
  17. Preamp with buffer design
  18. JP200 preamp?
  19. IFI 6SN7 X3 (6N8P-6H8C) Tube Valve Preamp Kit Board from eBay
  20. New Tube Manufacture?
  21. Lowering B+ in PS
  22. Rectifier tube blows
  23. direct coupling
  24. Need some help with these tubes
  25. Edcor GSXE10-8-5K primary Inductance?
  26. SE 2.5k secondary 2w guitar amp
  27. My "Red board" chassis
  28. PP EL34
  29. Building something better with a Chinese SE EL34B Amp DIY Kit
  30. Problem with my amp, and I have run out of ideas
  31. Value of coupling caps
  32. Testing 6BQ5 on Hickok I-177B
  33. Stepped Attenuator for AI Modulus IIA
  34. Tubes are beautifully colored....right?
  35. Differential Input for Aikido Amp?
  36. MY BEST OTL PREAMPLIFIER
  37. Valve testing machine
  38. Line stage with 12AU7 and 6CG7 anyone?
  39. Vibrating capacitor
  40. MingDa MC845-C or Opera COnsonance Reference 9.9
  41. Lower gain 12AX7?
  42. Needed: schematic for Ming Da MC34ab
  43. 12AX7 high gain guitar amp
  44. Solid State Cathodyne Phase Splitter Device?
  45. My Wave Isn't Square.
  46. 6J7 driver in WE91 like amplifier
  47. F2a - C3m Monkey
  48. balanced/unbalanced questions decision time
  49. Stern's saville double 6
  50. GM70 psu transformer.
  51. Antek toroidal vs Edcor?
  52. current production pentode, I_a ~ 8mA
  53. Brook 10c clone
  54. Unknown lamps need help
  55. What's wrong with this?
  56. Microphonics from C0G Caps across Heaters
  57. Yarland FV34CIII vs Synthesis Nimis
  58. 12AT7 and TDA1543...
  59. Eico Hf-81 Integrated Amplifier
  60. Tubed voltage regulator for KT88se amp, need help ?
  61. 1st post what can i build with this?
  62. CJ PV-3 voltage values for schematic
  63. How to analyze square waves?
  64. From KT90 to KT88
  65. side by side bifilar windings in excess of 1000 volts
  66. looking for a great tube amp book.
  67. Revox G36 Mod for preamp
  68. 33 in triode mode...any experience ?
  69. Help with Decware Zen EL84 SET
  70. Bumblebee Caps
  71. Find schematic of amplifier mcintosh mc 275 mkiv
  72. Heater wiring - Coaxial?
  73. now mono blocks!
  74. Heathkit AA-40 or AA-121
  75. UTC o-9 ouncers for headphone amp?
  76. Help modify 6H30 Mu-follower stage
  77. Help me to identify unknown tube
  78. Valve Compressor Circuit
  79. Should I rebuild my Eico 950 Cap Tester?
  80. Choke orientation (Need help)
  81. push pull 813 tube in ultra linear mode
  82. AD1865 DAC + 6SN7 analogue stage
  83. Inexpensive tube amplifier kits?
  84. SET amp/speaker issue.
  85. No pre-Amp - Pre Amp
  86. Found a CHEAP source of output transformers in Europe
  87. How calculate cathode LEDs biased
  88. ESR test for tube amps ?
  89. Anyone familiar with my 1975 Ampeg SVT
  90. asking help/knowledge asked: luxman d105u output stage
  91. Have you ever seen a 4 pin blue Alps pot??? need help
  92. Any ideas on this one???
  93. first 5f1 build is acting funny :/
  94. '57 twin question
  95. Why not 6C41C used in OTL??
  96. 6p14p(EL84) SE with 6n6p build jurnal
  97. Oscilloscope - Which one should I get ? What to look for?
  98. "Jonokuchi" - new desktop amp, or "Little red board"?
  99. Robust Driver stage recommendations
  100. Wireless World valve articles from the past
  101. Overshoot and Ringing
  102. B&K Tube Tester
  103. Harman Kardon A50K
  104. HiFi Tube amp project
  105. Submitted for your (dis) approval, OTL, Autobias Inv. Futterman
  106. Tone control - good diagram needed
  107. Pentron tube microphone mixer/preamp
  108. Dolby AC3 coming on nicely.
  109. Power Supply Question
  110. Dynatuner FM-1 Restoration
  111. faulty audioromy 6550 no output and very faith sound please help
  112. just one tube preamp or driver
  113. Power triode preamp a different way
  114. 49.95 Tube amp?!
  115. Which cap for the Musical Machine?
  116. How much power do I need in the kitchen?
  117. 1Gohm or higher resistor ...
  118. Grounding check for SE 300B amp
  119. Suggest me a build for HD600 headphones
  120. 6BQ5 Screen Voltage Regulator
  121. 6SN7 Tubes
  122. My first tube Amplifier VT4C DIY record
  123. Amplifier output wattage test
  124. Troubble shooting help please.....
  125. Heater Wiring
  126. 220/110 step down in reverse ... and more
  127. Input Level Devil please help
  128. Soft start for a preamp?
  129. Opinion requested: MingDa MC300 variants versus Consonance Cyber range
  130. Using one KT77 and one EL34 per side?
  131. Help identifying transformer wires.
  132. tube pre and tube power amp
  133. Spice Models for Tubes w Screen Grid by Gurski
  134. Theremin project needs some help!
  135. Transformer abuse or other use
  136. aikido heater voltage
  137. HY51Z datasheet, help !!!
  138. 6L6 amp with unique phase splitter - check my math
  139. Dynaco A451 Output Transformer
  140. my 250 watt tube amp can be a 500 watt tube amp for less than 2 bucks plus tubes
  141. 6AU6 preamp problem
  142. Help identifying a Telefunken(?) tube...
  143. UCC85 and e-pay
  144. Lundahl LL1676 - missing data
  145. valve phono pre-amp HELP needed
  146. Preamp pcb
  147. ECL82 pp guitar amp project
  148. Strange Problem In Tube Amp Build
  149. Output transformer question
  150. Replacing ECL86/6GW8 to PCL86(14GW8)???
  151. On or Off?
  152. Neg-Feedback into Grid of gain stage instead of cathode?
  153. Accuphase F-25 Japanese manual translation help!
  154. Negative supply with CT tranny
  155. E130L SE again
  156. tony builds a 7N7 preamp
  157. Tango 10429 78% Nickle Output Transformer?
  158. Bias for Ipod Input
  159. What about this driver????
  160. allen organ amp 75
  161. Needs help Tubezone Poseidon
  162. Lightbulb trick on filament circuit?
  163. AMC CVT3030a Help for repair
  164. TF110-48/UL in the UK?
  165. hum in pas2
  166. Aikido Cathode Follwer Question
  167. 12AX7 tube preamplifier for bass guitar (Need help)
  168. Fuses...what's the deal?
  169. Question Regarding a Partial Feedback 807 SE
  170. Preamp issue on Fender Blues Jr.
  171. Leftover transformers
  172. Newbie "In Search of help"
  173. ELL80/ECLL800 Cathode follower
  174. The "Tube" bookshelf
  175. knight KG-240? low output help
  176. Reverb trouble-Schematic reading help needed
  177. Vacuum tube VCO
  178. JE lab 2a3 , fizzy, squeal in one channel, help
  179. Trouble with a DIY EL34 Tube Amp Kit
  180. SPICE Transformer Model Spreadsheet
  181. Choosing the right triode as a Phase Inverter
  182. toob noob with GE 5670 and I'd like to do something with it. Help?
  183. my first tube amp, no tubes...
  184. Enough heat to power my CD player...
  185. My first tube amp: 6C33C
  186. S5 16LS kit as a first DIY tube build?
  187. lady day we 91 psu mod help
  188. On days like these ...
  189. The Magnetron - A Low Noise, Long Life Amplifier????
  190. 6M11's
  191. DC coupled 300B idea - request for comments
  192. Fisher bias
  193. How does anode voltage swing to twice HT voltage?
  194. Can a 7625 Ceramic Planar Triode be soldered ?
  195. AMI "DD" Project: 6L6
  196. Plate loading questions
  197. EZ81 rectifier
  198. PY500a
  199. Tube Regulator Thoughts?
  200. Fully balanced from cartridge to loudspeaker - a little help needed!
  201. OPT on the speaker side?
  202. tube circuit conversions?
  203. Current inrush limiter suggestions
  204. Repair of Philips EL6416 amplifiers.
  205. GU-19 In priboi
  206. Duncan Amps PSU Designer II
  207. Troubleshoot help for vibrato type problem
  208. using existing pre with this circuit
  209. Laney Tube Fusion 200 series 2 footswitch
  210. Antek AT-070L Specs
  211. Unused tube sections
  212. Rewire Rectifier Sockets for Tube Substitution
  213. Shuguang 300BC
  214. Sn/Pb S-Sn/Cu ...
  215. What and Where is BAF?
  216. CCS plate follower 12bh7 schematic needed pls
  217. 300B DC heaters confusion
  218. Blue Tube Red Plating = Help!
  219. Tube bass preamplifier power supply (Need Help)
  220. Opera Consonance M500 mkii
  221. 6AC7EH Better but different
  222. For that hard to find 5HY 2 amp choke...
  223. Cleaning up an old ST-70 chassis
  224. Accuphase P250 Amplifier Schematic Requred
  225. Pls Help me, this 6C33C pp Schematic is OK?
  226. Loud Noise due to NFB
  227. NAMM Zoo 2011
  228. Recommended O'Scope Reading?
  229. Damage to valve amp when powered up but disconnected to speakers?
  230. preferred resistor type
  231. use more then 'maximum capacitance' after tube rectifier
  232. Headphone Tube Amp D3a
  233. Dared 5.1 tube amp
  234. Designing Transformers with J.C.Maxwell
  235. Cathode resistor calc?
  236. Selector switch question
  237. good circuit to use with Grounded Grid Pre
  238. JJ KT88 tubes glowing bright yellow.
  239. Transistorised-Tubed-Magnetic Amplifier
  240. ST-35 Tube Brands
  241. Where you buy iron transformer core for DIY audio transformer
  242. Improve this SP-11 HV supply?
  243. More Antek Iron
  244. Edcor Transformer Specs
  245. Volume control resistance question? Step Attenuator?
  246. Minimum space between 6V6 tube in Push-Pull Amp
  247. GE Jan 6550a for SET amp?
  248. Chassis mount connector strip
  249. Transformer winding - mysterious!
  250. can anyone identify theses OT markings?

Content Relevant URLs by vBSEO 3.3.2