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
  1. Cool looking tubes anyone...
  2. st70 standby switch/cathode stripping SS rect
  3. BoM for an RH84 mono build?
  4. Signal hum ideas please.
  5. E88CC turbo
  6. SRPP vs. plate loaded, musicality and details
  7. 300B/EL156 Amp
  8. Just new one .all new layout.
  9. Am I correct????
  10. Need help identifying this amp...
  11. The Maggie factor
  12. Help wiring up anLED Bar
  13. E810F/7788 Pinout name/number?
  14. Need some help with a mercury 1200 tube checker
  15. Adjust cathode bias pot - both channels move together. Why?
  16. Building a 45 SET
  17. Stereo Pententometer Questions
  18. Looking for oscilloscope recommendations.
  19. dm160 magic eye help
  20. Tube stage for acoustic guitar?
  21. Zener heater regulator
  22. Dead Time - Correcting for it
  23. ARC Power source+ 12AX7&12AU7 Pre-amplifier
  24. PTC Thermistor for auto fixed bias
  25. How do I calculate output power?
  26. Microcontrollers in tube amps
  27. Dynaco PAT4/Aikido tube preamp
  28. RCA red base 5691 / 5692
  29. Updating my amps....and "hello" :-)
  30. my first attempt
  31. Finished my first PP amp, 6SJ7-6SN7-6v6
  32. Triode PP OP stage combining Blumlein Garter and CCS bias - anyone tried this?
  33. 6U8 Revisited
  34. DePalma redux
  35. Could this be a perfectly linear triode?
  36. Grounding elevated ccs series filament supply
  37. What to do with E182CC's
  38. Angela EL34 opinions please
  39. Chinise 6N1 tube replacement
  40. Ridiculous Hallucinations
  41. Transformer Ratings
  42. dB Meter with tube circuit
  43. Suggestions for pp or se monos
  44. Low filament current tubes
  45. Tube Clearout
  46. First tube amp, it needs maintenance
  47. Need EF86 phono preamplifier shematic
  48. cannot locate documentation on SCA 9190 receiver
  49. Ecc88 pin 9 connection??
  50. VTL Compact100 Monoblock Blows Fuse
  51. 300b driver revisited.
  52. SYclotron schematic
  53. Hum problem
  54. Suppo el34
  55. my new tube experience
  56. LL1682PP Lundahl
  57. BP Ultrapath
  58. Tube shops/sellers in Kiev , Ukraine ?
  59. Headphones with tubes...
  60. A Triad xfmr for a voltage doubler PSU
  61. Ra-100
  62. Series Resistors on Outputs of Transformer?
  63. what's up !? new choke=subsonic pumping
  64. How to get the best out of the 6C33C-B?
  65. TO-220 PCB spacing for HV MOSFETs
  66. Deluxe Reverb Clone too "throaty"
  67. Using a Dynaco ST-70 audio transformer for a guitar amp
  68. Need input on Buffer stage to use in Preamp..
  69. quad output tube help
  70. "Stacking" power transformer secondaries?
  71. Tubes flare on start up!!
  72. Solid state rectifier for AC30 clone
  73. Grid Stopper Advice - Graphs Included!
  74. Western Electric settings for Hickok 600A?
  75. Wanted! single-ended 807 schematic
  76. sputtering 5u4 on diy Wheatfield amp
  77. Is this output transformer faulty?
  78. Help identify variac
  79. Schematic for TL Audio VP-5051 Voice Processor
  80. what's a good layout for a quad EL84 amp on this box?
  81. Scott 350B Tuner; Bridge Rectifier
  82. intermitent static pops from speakers st70
  83. baxandall type tone control for diff amp
  84. Stage amps using DHTs
  85. Tube+OP My headphono & preamp
  86. NFB Clarification
  87. James output transformers
  88. I just bought a an old valve amp
  89. Bias Curves
  90. Triode in Class B or Beam Pentode in Class AB2
  91. Elna Cerafine Caps
  92. help with calibrating a Tv7d/U military tube tester
  93. Cathode Follower driven Phase Inverters
  94. Help finding a tube tester for Stereo tube amps.
  95. Anything horribly wrong with this (LTP w/ LM317 as CCS)
  96. Zenith OPT question
  97. OT/Speaker impedance mismatch
  98. Goldilocks & the 3 (or more) preamp power supplies
  99. Using SE OT for PP.
  100. Need preamplifier schematic/suggestions
  101. Push-Pull vs Push-Pull-Parallel
  102. Odd/Crazy output transformer design?
  103. what 2A3 desgin recommented for home theater
  104. power supply for 10m45s
  105. How badly matched are your IXYS10M45S ?
  106. Class B Push-Pull
  107. Please comment on my design -and a few resistor values..
  108. How to lower even harmonic, keep odd one
  109. PC Mount 9-Pin Tube Socket Layout
  110. datasheet for type 52, help !!!
  111. Another kt88 Monoblock Builders Thread
  112. Question about stacked pawer supplies
  113. ys audio preamp
  114. Need help on 811A partial feedback
  115. Funny console, need ideas...
  116. SMPS experts come on in please!
  117. DC Filament supply boards
  118. Looking for vintage radio sound
  119. Channel death - Chinese EL34 PP
  120. JFET cascoded with tube gain calculation
  121. Fet 6Gk5 ECC88 mc phono stage
  122. Heathkit ol-1 oscilloscope help. Can't get solid spot during setup procedure.
  123. Operating a stereo amp in bridged mode
  124. Mic input Transformer from Triode Elect
  125. Power transformer for tube amp requirements
  126. Tape playback amp
  127. Tube for high input Z
  128. Eico 666 tube tester restoration - need grid control!
  129. Need Schematic/Manual Lambda 71
  130. Replace ECC83 preamp valve with E88CC(6922)
  131. Advice on 6P3S p-p amp schematic, feedback problem?
  132. 6S41S P-P Amp Initial Query
  133. El Cheapo, builders thread
  134. kbu608 rectifier
  135. Looking for nice sounding amp project
  136. B+ for EL84
  137. Output Transformer kt88 6550 pp, Wires? Jukebox? Help.
  138. OPT with foil secondaries
  139. Small Tube Pre Amp - Power Supply Cable
  140. Identification of unknown output transformer
  141. master volume with a extra tube
  142. 10 pounds of power for $15
  143. Unstable Eico HF-87
  144. DIY Dual Channel Active Tube Tone Control
  145. cant eliminate 50hz hum on just one side of the 6h6p headphoneamp
  146. question about the 866a
  147. Trade Custom Speaker Horns for Custom Amp
  148. TVA-1 valve amp - help
  149. Need to source a PSU chassis - simple steel
  150. What should I do with my Dynaco MKIII's
  151. inrush current
  152. Scott 222B output transformer : Compatibility and specs
  153. C3G/C3M Prices
  154. 5v3, 5u4, 5u4gb, 5u4gbm, 5931?
  155. transformer for quad EL84 SE amp - will Antek 360v work
  156. Best Possible Tube Headphone Amp
  157. Help with cheap mono SE
  158. Millkido 24
  159. 60W mono's design help
  160. Psu question - best place for the caps?
  161. 1.2W guitar amp useing:6N2P and 6N1P russian tubes.
  162. RCA jacks
  163. Hickok 530-B tester charts wanted
  164. comparison of heater termination noise
  165. Some questions about an amplifier design
  166. 2nd harmonic feedback
  167. idea's for a valve preamp
  168. Best line stage tube?
  169. Bias Adjustment point
  170. Looking for a Williamson squematics
  171. Magnavox Console Speaker Impedances
  172. first tube amp
  173. Beam Triodes
  174. Winding output transformers
  175. Anyone Have a Schematic for Wavac MD300B?
  176. PushPull vs ParalelSE
  177. Painting transformer end bells
  178. all-octal schaded pp
  179. New Wood Chassis from Hammond
  180. Strange Noise From Amp
  181. Missing components
  182. Tube headphone amplifier.
  183. Emission - Double Triode
  184. Convergent Audio Technology - where is their Hompage?
  185. Mesh Plate
  186. Cathode follower question
  187. Power supply question
  188. Looking for a 866a powersupply schematic
  189. 211 or 845 project
  190. Modify Dynaco MKIII to use 6AR6s ?
  191. Yet another Dyna ST-70 Input Board
  192. Free Download Vacuum Tube Design Book
  193. driver stage for ppp 6550's
  194. power supply problem
  195. Positive/Negative Feedback
  196. Unholy Alliance Phono Amp
  197. Shrink a tube amp
  198. lampizator srpp help
  199. the secret of best preamplifier
  200. Any issues with adding a grounded power cord to a Heathkit IT-17 tube tester?
  201. HELP to ID push pull/Single Ende
  202. 12BH7,6414,and 12AT7 to drive EL34 better
  203. Testing Tube Amplifiers
  204. trade off higher HT current for lower filament current ?
  205. Any Russian analog of 12BY7 ?
  206. SV572-10 still being made?
  207. PP Output Transformer Testing Puzzle
  208. baby steps
  209. Partial FB: 2 SE + 1 PI = PP?
  210. G-807=807 SE or PP?
  211. 1Hz oscillation with CCS biased output valves
  212. Ultra-linear 6L6 output stage
  213. Transformer or capacitor coupling?
  214. Victor (JVC) Tube Amp MCM-200
  215. MiniWatt N3 problems, oscillation thumping and RF/motor problems.
  216. A2293 pins connection, help !!!
  217. Start-Up Delay for tube amp !
  218. Getting OPT in Japan?
  219. cathode follower tube buffer using 6n6p
  220. Buzz at output until tubes conduct
  221. I need help for amps.
  222. UL Connection results in higher distortion
  223. Header bypass Cap?
  224. DC heater large cap
  225. How to lower preamp output?
  226. Why use a pre amplifier
  227. DHT-buffered NOS-dac
  228. Microphonics 12AY7 v.s. 12AX7
  229. ECC99/2A3 interstage finished, but have one query
  230. Tube lovers in Germany?
  231. preamplifier
  232. Choosing grid leak resistor value -- partly subjective?
  233. What does the acronym "AMW" stand for?
  234. 6C33C distortion spectrum
  235. 6C33C OTL DC schematic needed
  236. help with identifying the cause of preamp problem
  237. Rosenblit 70w Mac amp
  238. Grounding scheme
  239. CC vs Shunt filament supply?
  240. Need opinions on boxing a dual mono line stage
  241. Lets settle the b+ on cold tubes issue!
  242. New 2A3 SET / Simple, but gentle sounding amplifier
  243. Magnavox Console Amp Chassis
  244. transformer identification
  245. 50Wrms audio amplifier
  246. 12B4 have a good sound ???
  247. almarro OPT question
  248. Best EL84pp kit??
  249. Clarion 6L6G Oscillator Amp.
  250. Did you hear an original tube sound?