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. VoltCraft AT-400?
  2. Sonic differences: 45, 2A3, 300B, 845, 211
  3. Need help wiring a pot for cathode adjustment
  4. Sound of the 6SN7?
  5. A mystery device
  6. Plate curves... Ic2 & Ib?
  7. How to choke load for big voltage swings?
  8. 6550 SE design, please comment.
  9. "Impedance" of the output transformer
  10. Triode-wired small signal pentode question
  11. Calculating output impedance
  12. 6JM6 Infomation for Pete Millett's DCPP Amp
  13. Tube labeld ETBB
  14. Heaters wiring help!
  15. What do you guys think of this IR volume control?
  16. Can you send me the Aikido 5687 user manual
  17. Cathode Follower output cap
  18. EL84 rebuild suggestions
  19. voltage divider in WE91 driver
  20. Power Tx Myth?
  21. voltage multiplier based on SS trafo - LONG
  22. What tube for QUIET phono pre??
  23. A&R 8ohm 4008 output transformer
  24. How does DRD Ultrapath Work?
  25. Russian 6H2p-E??
  26. Started work on my stereo 7027a PSE amp
  27. Mono Tube Comp for analog kick drum
  28. Line stage preamplifier
  29. Trying to select the Aikido components
  30. X-PRE musical fidelity preamp. need help modifying
  31. 6C33C & Borbely Question
  32. 12BH7A in common cathode
  33. Sneak Preview: 9 Band Active All Tube EQ
  34. Bought a set of Greenlee conduit punches for my latest project - WOW!
  35. "Universal" octal amplifier?
  36. MU follower - distortion
  37. lighting transformers 12V
  38. Chinese 6N3 preamp questions
  39. Why are Chinese preamp knockoffs so popular?
  40. 4K7 OPT suitable for 6550/KT88?
  41. Transformer question - 110 v and 25 v from 1 secondary?
  42. About loadline again, how to choose load and current
  43. Parallel Output Transformers
  44. 6SN7 / 6V6 power amp : very odd behavour
  45. HV mA Spec on Large RCA Power Xfmr?
  46. Is the Aikido too 'bright'?
  47. Has anyone put the Glassware phono & line amps in same box?
  48. High impedance balanced output: how long the cable?
  49. Data Sheets
  50. Can I use a LM317 bias on lower cathode of SRPP?
  51. AU-34 Output transformer replacement question
  52. The new KT120 from tungsol
  53. em83 questions
  54. Push-pull PCL84 schematic and a question
  55. confused on power transformer ratings
  56. C3g:GM70:GM70 schematic advice
  57. Can someone explain Load Lines?
  58. Humming from WCF but not SRPP
  59. Gas regulator tubes
  60. My B&K 707 sensitivity seems wonky
  61. Lowrey LC1 B schematic wanted
  62. Complete tube amp novice got a few questions!!
  63. jacked up the bias...WOW!
  64. Looking for PP 7027a shematic
  65. So, if it's not DIY Gene, then what?
  66. What driver tube for 200Vrms?
  67. Tube socket purchase
  68. Something I found interesting a while ago!
  69. Eico HF-22 Circuit
  70. SEDHT amp - decisions decisions
  71. Confused with designing
  72. Digitally controlled analog attenuator
  73. Purchased my 1st valve amp and can only get one channel working, please help!
  74. Another silly tube yesting question
  75. potentially very stupid questions....
  76. Tube rectifier: AZ1, AZ31, AZ50 vs 5u4
  77. Tube Square-Law, what and how to set up?
  78. Need help finding schematic. Conn 720
  79. OPT for parafeed SE
  80. Anyone else tried an opamp as a driver?
  81. e180f/6688 pentode operting points
  82. power supply reassignment problem
  83. Mains power transformer on S5 K-12 kit hums?
  84. Oriole OPT
  85. 26DQ5's vs 26HU5's vs 6KN6's and transformers
  86. SRPP power using power tranny as OPT?
  87. Need guidance with heathkit SA-2 refurbish/mods
  88. B+ discharge times!
  89. 26HU5's....and a confession
  90. Bell Sound Systems Pacemaker Model 2220
  91. Any thoughts on this transformer on eBay?
  92. Need some help figuring out a Wurlitzer 6240.
  93. Bypassing cathode resistor on pp power tube
  94. TRIODE Voltage amp + Power OP output follower
  95. Cats and tube-a-holics
  96. Replace Tube Rectifier With Weber CC?
  97. 717a 2 stage SE amplifier
  98. Thoughts on Oatley K282 Valve Preamp?
  99. SS rectifier for SimpleSE and others...
  100. Need match Pr KT-88
  101. EL34 PP - again !!!
  102. S5 K-12 Kit sounds excellent with iPod, but relatively low volume with turntable?
  103. Finished K-12 Kit with cedar / brass chassis (pics)
  104. Tubes HOT!
  105. Meng volume pot problem
  106. Use P-P OPT for SE?
  107. Safety ?
  108. 851 set?
  109. dual cathode follower problem
  110. Question about connecting grounds
  111. Is it okay for capacitors to be close to the main power transformer in S5 K-12 Kit?
  112. Fisher 500C Schematic
  113. looking for PP 6l6 schematic
  114. Muiscal Paradise MP-301 6V6 amp.
  115. First Build - PS Voltage Question?
  116. Need help about an hybrid amp circuit
  117. Pioneer SX-348 - Service manual?
  118. Tube PS for mic preamp Help
  119. Add rectifier tube to yaqin mc10l? What size is best?
  120. global negative feedback schematic
  121. Signal transformer question
  122. What speaker system for tube amplifier
  123. 39/44 Tube
  124. tube-aholics anonymous ?
  125. 12AX7 heaters from 9VAC transformer
  126. Cant stop Aikido Humming
  127. Suggestions for rotary switches
  128. Question about potential transformer placement in K-12 Kit
  129. Extra pins on replacement potentiometer for K-12 tube kit?
  130. SRPP - issues understanding how to increase current
  131. ARC Power source+Marantz 7C(PCB edition)
  132. Repair and adjustment tips
  133. trimax output transformer TA2444
  134. anyone recognize this valve?
  135. Microphone Preamp design
  136. 6CM5 hi-fi amplifier
  137. Building an amp try #2
  138. Can the 6S33S/6C33C be mounted horizontally?
  139. A heptode question
  140. Looking for a 807 amp with 4 pairs of 807's
  141. pp output transformer miniblok2
  142. John Swenson's BDT preamp - finally!!
  143. Voice of Music console 816
  144. Steve Bench 1 tube reg in all glass
  145. Conn Caprice 427 needs new 12AU7 tubes—advice?
  146. Position of Iron in Can of HK Citation II Output Transformers
  147. Bottle size,does it matter in matched quads?
  148. Heater Pots?
  149. Current calculation from datasheet
  150. Any one ever seen this amp?
  151. Guiguang 300B for 300Beast.....
  152. FLEA PPP, all ecc99
  153. Well, it is time to start thinking about winter projects. GM70
  154. aghhh is my tube okay?
  155. Grid Bias provided by transformer secondary winding, what is this stuff about?
  156. Zener regulated supplies
  157. OPT fore drive ribbon speaker directly; why not ?
  158. van Dorn's Octode design - recommendations for a 10W/ch version
  159. Outrageous Speaker/Amplifier Idea
  160. Anyone ever made the EL84 P-P circuit referenced on the Tubecad Journal site?
  161. Cathode Follower ideas please.....
  162. Anyone used the NTE1866 VU LED driver?
  163. Any potential problems when using a combo potentiometer / power switch on a K-12 kit?
  164. Help needed understanding component values.
  165. Separate passive pre and monoblocks?
  166. My new diy site
  167. Valves and musical instruments
  168. My DC Darling
  169. Question - add LED power indicator to Aikido pre
  170. Colorful amps
  171. Aikido Cathode Follower
  172. Converting a dirty channel to clean?
  173. A few questions about transformer placement in an S5 K-12 tube amplifer
  174. Bogen AP30 and new member
  175. Echocord Super 62 Feedback at Low Levels?
  176. Direct Coupled 76/5687 linestage
  177. Be kind to your 5AR4 and input capacitor
  178. New Self-Powered ROHS compliant electronic device invented!
  179. Making my first hifi tube amp.
  180. Variation on Rodīs bias servo
  181. "No Light District" P-P amplifier
  182. What kind of tubes do i have?
  183. Understanding Scope Trace Square Wave
  184. Single tube SE with EML-20B
  185. LED bias cathodyne
  186. Diagnosing hum???
  187. Posted tube microphone preamp design
  188. Finally put the Aikido in a proper chassis
  189. Tube Preamp / Headphone amp question...
  190. Phono Preamp
  191. Initial 'DQ5' testing
  192. Free Tube Amplifier Schematic Diagrams
  193. Testing with DMM
  194. The Impressive Vetruvio GM70 SET amp.
  195. 6sn7 subminature??
  196. One channel louder than other
  197. How to use RCP 802A tube tester test B9A tubes?
  198. phono amp question - adding input tx
  199. Ebay "clones" PCB
  200. Phase splitter and balance input
  201. At Last....First Build Complete...6V6/6SL7
  202. Amplifier input
  203. The Tube Maze
  204. Variable Harmonizer
  205. Vetruvio Audio; new competition for the Chinese?
  206. Transmitting tube-driven transmitting tube SET amp?
  207. Circlotron questions
  208. Home Grown tube amps
  209. LT108 Oscillation sounds like tube rush/white noise
  210. Cool looking tubes anyone...
  211. st70 standby switch/cathode stripping SS rect
  212. BoM for an RH84 mono build?
  213. Signal hum ideas please.
  214. E88CC turbo
  215. SRPP vs. plate loaded, musicality and details
  216. 300B/EL156 Amp
  217. Just new one .all new layout.
  218. Am I correct????
  219. Need help identifying this amp...
  220. The Maggie factor
  221. Help wiring up anLED Bar
  222. E810F/7788 Pinout name/number?
  223. Need some help with a mercury 1200 tube checker
  224. Adjust cathode bias pot - both channels move together. Why?
  225. Building a 45 SET
  226. Stereo Pententometer Questions
  227. Looking for oscilloscope recommendations.
  228. dm160 magic eye help
  229. Zener heater regulator
  230. Dead Time - Correcting for it
  231. ARC Power source+ 12AX7&12AU7 Pre-amplifier
  232. PTC Thermistor for auto fixed bias
  233. How do I calculate output power?
  234. Microcontrollers in tube amps
  235. Dynaco PAT4/Aikido tube preamp
  236. RCA red base 5691 / 5692
  237. Updating my amps....and "hello" :-)
  238. my first attempt
  239. Finished my first PP amp, 6SJ7-6SN7-6v6
  240. Triode PP OP stage combining Blumlein Garter and CCS bias - anyone tried this?
  241. 6U8 Revisited
  242. DePalma redux
  243. Could this be a perfectly linear triode?
  244. Grounding elevated ccs series filament supply
  245. What to do with E182CC's
  246. Angela EL34 opinions please
  247. Chinise 6N1 tube replacement
  248. Ridiculous Hallucinations
  249. Transformer Ratings
  250. dB Meter with tube circuit

Content Relevant URLs by vBSEO 3.3.2