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

  1. Help: Interstage Transformer for 7788 (E810F) Tube in Triode ?
  2. Transformers
  3. Pentode curves for GU 50 SE amp with 700V B+
  4. Valve op-amp pre ?
  5. Use only half of OPT secondary?
  6. On/Off cycling
  7. Tube operating points help
  8. OTL Heater Questions
  9. tube output question
  10. RIAA LCR Mythos
  11. first tube amp
  12. M135 retubing and eventual modification
  13. Taylor 211 vs. GE 211
  14. regulated
  15. What should I do with these eico hf-12's?
  16. Dynaco mk3 clone hum issue
  17. First DIY project, which SE tube amp should I build?
  18. 6n11 tube headphone amp
  19. Kt88 Pin alignement problem=did a mistake
  20. LTspice Frustration...help, please..
  21. Bias mods
  22. Maida tracking preregulator?
  23. 230 VAC to 2*140 VAC transformer - 20VA
  24. Re gettering?
  25. Distortion rise on OPT
  26. How to build a transconductance tester for small driver tubes?
  27. Musical Fidelity X-10D Cap Mod
  28. 6N3 & 6E2 tubes.
  29. help with local nfb
  30. What should I build
  31. leak st20
  32. Wright Audio WPA 3.5 Humpot & schematics
  33. the old light bulb trick
  34. Dynaco ST70 KIT - your opinion please
  35. Wire for tubes using a plate cap?
  36. Lundahl LL1660 OPT Franks 6SN7 linestage
  37. GU-50 PP + 10k:16-8-4 Ohm ,20w OPT..what is the best to do?
  38. Tomiko 10k PP transformer?
  39. Powerdrive for higher grid wattage A2 transmitter tubes
  40. Marantz Model 5 Amps and Model Seven Preamp
  41. How to calculate output transformers
  42. Grounding considerations with external PS
  43. Cathodyne fet buffered balanced line out
  44. 807pp + input phase splitter
  45. leak st 20
  46. Questions about Champ mods, NF loop and more
  47. Does anyone know what this is!..???
  48. Thought Exercise: Submini Circlotron OTL Amp
  49. Preamp Grounding PCB
  50. Manley 440: Tubes red cherry after replacing old tubes with new ones
  51. EL95 Parallel Push Pull design
  52. What is the ideal low-noise heater power for high-power output tubes?
  53. Beijing 6N6T
  54. Tube recomedations for my first tube amp
  55. Tube Load Lines and B+
  56. Hybrid rectifier possible in PSUD?
  57. Hickok calibration
  58. Bias voltage slower to come up
  59. Can You Reccommend a 6922 tube?
  60. Miniblok Resistor Parameter Modulation using Pots
  61. gm70 driver tube tests
  62. 300B Globe physical dimensions
  63. DIY Fisher 800b into a mic pre
  64. OPT Modification Question-Help please?
  65. Cant find origin
  66. Fixing Sneaky Oscillation in P-P Amplifiers
  67. fu-29 Audioromy
  68. Almarro A205A as experimentation platform
  69. Thoughts on layout and potential for improvements
  70. What is the difference between "rectifier tubes" and "power tubes"
  71. uTracer...
  72. EL84/UL84 single valve amp
  73. Mic preamp - strange high frequency roll off problem
  74. Tissbury audio
  75. midification to srpp preamplifier input voltage
  76. DHT SE amp with ultrapath
  77. Tube mic preamp problem
  78. Output transformer: reasons for destruction?
  79. Bewitch KT88
  80. SE OPT Wiring
  81. maggie 185 to stereo guitar amp?
  82. Budget 300b tubes recommendations
  83. Hum problem through one channel
  84. Audio Research LS22 DIY
  85. 300V Tube Power Supply From 120VAC Without Rectifier?
  86. NOS Tube: Black Spot on Getter Flashing? Help
  87. FET Source Follower Distortion
  88. TUBE/MOSFET/BJT hibrid amp
  89. PYE Black Box amplifier
  90. Tube tester
  91. what OPT for 211 parallel SE amp?
  92. Opinions for 6550 bias.
  93. 832A as a Single Ended Tetrode Amp?
  94. DCPP - "Engineer's Amplifier" : Need a bit of help
  95. quicky rebuild 6v6 to 807
  96. Old fire bottles.
  97. Regulated Power Supply using 6550
  98. GU50 SE vs 300B SE tube amp??
  99. Help with voltages
  100. New to valves & this forum.
  101. new amp 2a3 pp
  102. Telefunken EL153 SE circuity
  103. RH 84 Variation: Direct Coupled Pentode
  104. Single Transformer, two valve rectifiers
  105. Capacitors for Radio Frequency Amlifier and Converter Oscillator Tubes
  106. Tube Screening Cans
  107. PSU grounding
  108. 6AX4GT TV damper
  109. plate on chinese 6L6 red on one side
  110. FM stereo decoder
  111. Under the Christmas Tree - Valve Amplifiers 4th Ed.
  112. Using those dern 1625 tubes: a simple SEP amplifier
  113. Pairs of resistors in opposite directions
  114. 45 spice model
  115. APEX 460 Tube mic modification
  116. EL84 and 6BQ5 are Same?
  117. Simple hybrid amplifier (35W/8Ohm)
  118. Yaqin mc 10l or qinpu 6000 mkii
  119. Reported attack site?
  120. LCR RIAA Phono with DHTs
  121. New Here -Would Like to Build
  122. 12E1 push pull poweramp
  123. marantz model 9
  124. I would appreciate some helpfull advice from Aikido builders
  125. Dynaco ST70 big Snorting noise.
  126. Good Soft Distortion
  127. magnavox 8301 revamp, need's a second look
  128. Circuit or schematic for current source of 7.5mA
  129. Sakuma's bleeder tubes and series connected transfomers
  130. Tube measurement
  131. adding tone control to SE 6v6 amp
  132. Easy Little 6L6 SE
  133. knight KA-55
  134. Hum in tube amp
  135. Lundahl LL1660 10 mA Alt V
  136. 12au7 valve preamp (again?)
  137. Simple DC heating question
  138. 6146B?
  139. Reduce gain on power amp?
  140. ES9023 DAC(subbu) + Tube Preamp with Remote and R2R volume control(Danzup)
  141. AC heaters question
  142. Anyone tried this Mcintosh c22 knock off.
  143. Help me to find pins for tube socket
  144. HT delay pcb...
  145. Power supply, heater questions...
  146. Heathkit AA-151, to separate pre-amp advise needed?
  147. grounding
  148. 2 Stage GM-70 amp in A2... possible?
  149. GlassWare Janus Shunt Rectifier Tube Swap
  150. Schematics
  151. SE 6B4G driver tube options?
  152. seeking datasheet of 6J2B-V in english
  153. Nailing Hum in my Phono Stage
  154. Shaving voltage off HV supply?
  155. LEAK T12 and POINT ONE - worth having ?
  156. Quicksilvers Mid Mono Schematic?
  157. Russian & East European Tube Factory Logos
  158. Lampizator Channel
  159. RIAA triode or pentode
  160. Cute Little Tube Oscilloscope, Thought I'd share.
  161. Is it really possible to deliver 2W into 40 ohms with an SET ?
  162. se
  163. Connecting Two Amps to Common Input
  164. Wiring Aikido using LSA/HPA switch
  165. Most exotic SET power amplifier
  166. Help with rogers cadet 3 integrated
  167. Opamps for servos in tube amps - Christmas gift from LT, 12-12-12!
  168. tube amp hum........normal or suggested fix?
  169. Building a beast: Stereo EL84 auto bias PP tube amp
  170. Becker Brescia auto radio
  171. Double feedback pentode Power Stage
  172. Anyone Using Guiguang 300b tubes?
  173. Where to get Audio Note Gaku-On service manual?
  174. Sanity Check - Input Transformer Overshoot
  175. TOA HA-355 vintage tube PA amp schematic
  176. EL34 PushPull UL Amp
  177. 6L6G emission too high
  178. Need help designing BIAS circuit for old Bell amp
  179. Heathkit A-5A 6L6 PP Integrated Amp
  180. Where to put the meter
  181. Radii GS-40pp
  182. Concept dilemma (pre/pwr/spud content)
  183. What to do with these Eimac tubes?
  184. Driving 211 with VT25 or EL34?
  185. DIY AMP start project - Help choosing one
  186. Pilot 248B Amp with weak channel
  187. 6H30 VA stage?
  188. What is the best way to connect DC filaments?
  189. suggestions for a parallel feed 45 amp?
  190. Counterpoint SA 5.1 repairs
  191. The Morgan Jones mini tube headphone Amplifier
  192. Borbely headphone amp
  193. Found An Amplifier In My Basement I'd Forgotten About & Learn It's Sought After
  194. Floating OPT oscilloscope measuraments
  195. I Wasn't Away That Long, What's WIth The Price Hikes On All My Old Toys?
  196. Channel voltage mismatch
  197. OS70/1750 datasheets
  198. Beautiful Chassis
  199. 6A4, 46 and 47...excellent sound tubes !!!!
  200. Is it Overkill to use Duelund Caps in Power Stage (Counterpoint SA-5.1)
  201. Quicksilver M135 Schematic?
  202. recognize this old amp?
  203. grey fogging inside 6sn7
  204. Point to point or pcb?
  205. Quad query
  206. Fixing a Velleman K4040 - Buzz HIss Crackle Blown Tubes
  207. Found Original Genalex 12AX7..Need Advice..
  208. OPT power rating and amplifier power
  209. 6BG6-GA
  210. EL84 driving EL84 SET with fixed bias
  211. P2P 6CG7 Input Buffer
  212. 865 in triode mode...anyone ever tried it?
  213. PP KT88 Amp Low frequency Ringing
  214. World audio designs kel34
  215. Glassware Audio Design
  216. 2A3 mounted horizontally
  217. from tube amp to fm reciever
  218. diy tube amp
  219. Cary 805ae xlr option
  220. ST-70 mono makeover
  221. breaking in audio capacitors
  222. Question about 6V6GT amp schematic
  223. Sherwood Schematic
  224. Ever hear of a D7L1 or D7L3 YR7 tube?
  225. Psvane Replica RCA 2A3 tube - WR2A3
  226. 845 Driver Circuit
  227. ADJUSTABLE BIAS MOD KIT
  228. Gold Lion B749 12au7 Thoughts?
  229. Siliconray SRK 09 tube amp kit help
  230. Quantum minstrel
  231. Does anyone know how John Lee Hooker recorded this? (1949)
  232. Please Identify these black capacitors.
  233. New Tubes too silent (6P15P)
  234. best sounding & value amp kits/designs?
  235. Custom Woodwork For Tube Amp
  236. Tube 2E22 in triode mode
  237. Has anyone built an OTL amp with switch mode power supplies.
  238. Altec 15067 transformers
  239. Some interesting findings with transformers
  240. Bogen KO-60 Output Iron
  241. What would you do with Scott 222D IRON?
  242. Aikido vs CCDA
  243. wiring color code
  244. Maverick Audio TubeMagic D1 DAC
  245. Is one gz34 enough
  246. Edcor OPT opinions
  247. mengyue mini/ming da el34b
  248. I need a tube buffer circuit using a 12au7
  249. Stereo Amplifier Wood Enclosure
  250. What is the theoretical advantage of direct heated triodes?

Content Relevant URLs by vBSEO 3.3.2