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

  1. Stereo Tube Amp Under 10 Watts Inquiry
  2. World Audio Design KECL82 Schematic
  3. DIY tube preamp with active crossover
  4. Questions re restoring old amp
  5. M2057's, has anyone experimented with these yet????
  6. Question about building amp from AA100 parts
  7. What is a R4A3 type valve?
  8. Seeking a peer review for my preamp design
  9. List of commercial all tube phono preamplifiers
  10. Schaded SE Pentode drive Pentode amp
  11. GM70 IT PP
  12. tube preamp oscillation
  13. What determines the bass response in a Magnavox 93 series amp?
  14. Preamp/Phono Stage Transformer
  15. Yaqin MC10
  16. the small SE UL ECL 805 / EY 82 !!!
  17. Is this ERNIE?
  18. Offering from China
  19. Name that tube manufacturer
  20. Does sunlight affect valve characteristics?
  21. Can we talk about series/pass regulators?
  22. How electrically fragile /robust are valves?
  23. Altec Lansing 345a variant/homebrew
  24. Another newb with a plan-to-build saying hello
  25. What is the closed alternative to CV4002?
  26. A safe Dc coupled amp
  27. 6550b amplifier schematic
  28. Chokes on the old days VS. flter caps
  29. Old tube amp used outside.
  30. Has anyone tried Metglass C-Cores in Audio Transformers ?
  31. Dynaco ST-70 rebuild makes hum when plugged to input, not with shorting plug
  32. 12ax7/5751 - using the full tube or half in gain stage
  33. When is too strong a tube still good ??
  34. Would you say this is good or bad blue glow?
  35. 211 vacuum tube rolling for Air Tight 211
  36. Is it ok to put a valve inside a vented enclosure ?
  37. What phase splitter is this?
  38. 6GK5 as input tube for phono preamp?
  39. Tube bias problems
  40. K12 change transformer
  41. Me and my soon to be amplifier
  42. Pioneer ER-420 tuner dial issue.
  43. Akai M8 Amplifier Mods
  44. The 'every tube' amplifier
  45. EL84 power supply
  46. resistor in HT supply
  47. 5824 (25B6G) output tube
  48. relative impedance of balance pot to volume pot
  49. Glassware Opinions
  50. Tip for searching for schematics
  51. Why is a (power) triode so expensive?
  52. Advise on output transformer vs PP tubes
  53. newbie heater filament issues
  54. Grid-cathode voltage and grid current in 12AX7?
  55. Lafayette LA-240. Schematic please.
  56. A little advice ? Please
  57. CF output stage - float heater or tie to cathode?
  58. Help redesigning schematic from GZ34 to EY200A rectifiers
  59. 12 VAC Aikido, need part numbers
  60. Dynavox VR70
  61. 12BZ7
  62. Troubleshooting 6GU7/KT88 Williamson Amplifier
  63. 12AX7 stand alone preamp output load
  64. Super Triode Connected (STC) chip amp
  65. WE 350B and tube tester
  66. Lundahl LL9202 secondary inductance help
  67. Low noise compromise
  68. RH 6550 SE amplifier
  69. Help substituting power transformer.
  70. acuhorn clone
  71. Low Voltage Tube Head Amp.
  72. Balanced Tube Headphone Amplifier?
  73. Williamson amplifier re-build
  74. Out of the Box: Part 6, a 25W PP UL 6L6GC Monoblock
  75. Grundig External Speaker amplifier IV
  76. Parts for 8audio EL34 Jadis JA30 build
  77. Question about output transformer
  78. Current Shunt
  79. Parafeed L & C calculations wrt Z?
  80. Cathode Bias Resistor and Capacitor Values
  81. Pentone preamp to get some saturation for SS amp
  82. Out of the Box Part 5: SE 6AQ5 Completley Integrated Amp
  83. Forgive Me DIY Audio, For I Have Sinned 10LY8
  84. PSUD II question
  85. Purist Wet Dreams Customized Review
  86. Triodes and feedback theory
  87. Transformer taps
  88. my new philips stereo system!
  89. Phono preamp with modern pentode as first stage
  90. Adding headphone output to Aikido LV
  91. QEE3041 output trafo on tube amps?
  92. 6A3 Cool Amp
  93. Magnavox 175 - different feedback in each channel
  94. Outside the Box, Part 4, a Class AB2 PP 6V6 Amp
  95. 6GF7 and 300B amp
  96. AC filament and ground
  97. Dummy load for tube amp
  98. have i just blown my valve amp?
  99. Sub miniature pentodes - what shall I do with them?
  100. DRD calculator
  101. OTs in parrallel without one tube
  102. Cathodyne investigation - stop the presses!
  103. Special offer for skilled tube fanatics
  104. Heathkit w7-M Power Supply Sidebands
  105. Morrison 300B SET - where to connect current meters?
  106. Could someone look over my schema?
  107. question on 101D tube
  108. Outside the Box- Part lll, Twin Coupled Amp
  109. Thoriated Tungsten Filament 2A3?
  110. Screen resistor sag limiting zener.
  111. Baffling Hum Issue
  112. Can I replace 6H9C (6SL7) with 6SN7?
  113. How Good Is This Amp(Sound Luster)
  114. 6V6 grid-to-ground resistor tone shaping?
  115. Pioneer SX-34B
  116. Outside the Box - Part ll All Triode UL PP Amplifier
  117. How to add Global NFB to a circuit with LED bias and cathode follower?
  118. Heathkit EA-2 customization
  119. cathode feedback transformer and damping factor
  120. Is my 274b/n defective
  121. Need to find 300B tube amp use 6SN7 5U4G >25w/ch
  122. Two SE OPT -> one PP OPT?
  123. Thinking Outside the Box - A Different Kind of Triode Audio Amplifier
  124. Amp Circuits Tutorial
  125. Push pull ecl86 stereo amp
  126. Using a CCS for bias.
  127. Using Telefunken EL-156 in Dynaco Mark III amp
  128. preamplifier with POSITIVE bootstrap feedback
  129. Low Voltage Aikido questions
  130. I had an idea for a SE UL amp with local feedback output stage
  131. Woolgathering
  132. all dht system?
  133. Question - Labeling Tested Tubes
  134. Tube amp inactivity auto-off
  135. High gm version of 12AU7
  136. Need help on B+ output
  137. Tube substitute
  138. DIY SRPP ecc82
  139. Schematic needed for circa 1985 tube preamp kit
  140. Ultra-Linear Midget Amp ?
  141. 12AX7 + 12AU7 preamp with feedback?
  142. Counterpoint SA 3000 Transformer
  143. EL 84 in triode
  144. Pictures of your socket dampers (shock mounts) installed!
  145. Amperex bugle boy help
  146. Can I use a PP interstage for SE?
  147. Classic 4 valve PPP circuits
  148. Ultra linear OT PP 30W/25W for SE amp of low power? Safe?
  149. 12v/24v RIAA MM preamp
  150. Schiit LISST SS tubes?
  151. Feline Futterman OTL Amp
  152. CatSkin Class A2 SET with Secondary Flux Cancellation
  153. How to wire a 4pin base to 5 pin top tube socket adapter
  154. Coupling cap spec
  155. Bought 6AS5, got 6AS6 instead. Any audio use?
  156. Help verifying EF86
  157. Quad II power transformer
  158. KT88 Mutual Conductance Test
  159. Help Identifying A Valve Amplifier
  160. Sonic Frontiers Power 3 Help Needed
  161. Re-build of my first OTL from 2000
  162. Help with choosing substitute output transformer??
  163. Last stop before the end of the road !
  164. Output Transformer insertion/power losses
  165. OTL, not OTL, & Matching VS Loading transformers
  166. Out with the MJ in with the Aikido
  167. What can I use parts for?
  168. Can someone help me understand this topology?
  169. Looking for PP design when I already have the OPTs
  170. New project, Damn Good 300B amp.
  171. medium power (~20W) amplifier and power supply requirements
  172. ID this Dynaco ST-70 board
  173. SRPP with different brand of tubes ?
  174. Best tube amp clone for stereo music
  175. RCA receivers / amps
  176. Triode PP design questions - where to add gain?
  177. Push Pull Tube Amplifier with CCS
  178. McIntosh MC275 problem.
  179. converting pentode data to triode-strapped? The 1609 pentode?
  180. Moscode 300 Manual/schematic
  181. Need help with new amp design
  182. 4699 SEP (unusual cathode feedback?)
  183. DH filament side matters?
  184. FU50 + 6N8P + 5Z3P Amplifier
  185. Collet wire connector for 300B socket?
  186. KT-88, KT-77, Russian 6SN7 makes "pops". Should I touch their pin with an iron?
  187. Tube Power Supply Question
  188. Would there be any harm using 10K OPT for 45 tubes?
  189. Restoring the first Pye HF25
  190. Jolida FX10 mods
  191. Help needed - DIY amp not working; first time powering up
  192. EL86: push-pull for home
  193. Input transformer question? Help identifying
  194. Anyone ever tried building the Feral Eye 2A3 PP?
  195. Schade Feedback In A Push Pull Differential Amplifier?
  196. PSA: new diy tubes sub on Reddit
  197. Hum/Buzz in a tube PP amp
  198. 300B+6GL7 SE stereo integrated amplifier
  199. Bias tap on b+ or separate winding?
  200. Arcturus No. 12 tube
  201. SainSmart 6N3 pre for Pass ACA
  202. Single ended MM tube phono amp
  203. 5U4G schematic for 4x6SN7 Stereo Octal Akido Preamp.
  204. ECL82 amp from old magnetophones
  205. Bogen MO100A with KT120 ??
  206. Someone sales out trafos Jensen transformers in europe?
  207. Book recommendation?
  208. Sanity check? HV supply for 125wpc sweep tube amp
  209. 6922 Technical info (help)
  210. How about this phono idea
  211. Scottkit trouble
  212. How to remove tube metalization
  213. Old Dynatron Information
  214. good driver tube with 150mA heater?
  215. Tell me what this is
  216. Switch between tubes with relay
  217. Need some help with my Palmer Eins
  218. A rare tube in my hands. Info please.
  219. Dealing with Heater Elevation/Ground Reference for aux circuit
  220. 6GK5 OR 6AH5 for phono head amp
  221. Parallel triodes: best connection?
  222. Which resistors to replace burned ones in Dared DV-300b monoblocks
  223. Unusual tube preamp, will it work?
  224. Eico HF-81 with Pre Out?
  225. volume control by pass power tube
  226. Single End Transfomers, The hysteresis loop and maximum current
  227. DC at output on startup
  228. Yet another ECC82/12AU7 Line Preamp
  229. Clarke and Smith EL84 Amp
  230. Are rectifier tubes still relevant? Why would you use one, or avoid using one?
  231. replace 5R4GA to WE 274B
  232. 6sl7 vs 6n9p vs 6n9s
  233. MAC bifilar output stage test proof
  234. Dummy load for bench testing tube pre.
  235. Brook 12A Mono blocks
  236. Maximum Ic before auto shutdown
  237. Octal Akido HP amp as pre amp
  238. loudspeaker series resistance question
  239. Which preamp a better match for low-volume listening?
  240. Balanced Signal, Phase Splitter in Push Pull topology
  241. Pin 4 Grid 2 Resistor
  242. Weird voltage w/ LM1084 regulators / #27 filaments
  243. My Audio Research SP-3-A1 Restoration and Questions Documentation
  244. Almarro a318B
  245. Bakelite and Car Brakefluid
  246. Chinese 6N2 / 6P1 schematics advice needed
  247. Operating point of GM70
  248. 50W 6L6 (6P7S) how to replace tube ccs for solid state?
  249. Star Grounding for a Line Stage Tube Preamp
  250. ID Kit Amp Help. K-12 Tube Amp or Similar?

Content Relevant URLs by vBSEO 3.3.2