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

  1. Which pentode for input?
  2. 6n6p or 6P14P-ev for driver
  3. Old tranny - confused with windings
  4. Dynaco A-430 Vintage Output Transformers
  5. Output tube for 800 Ohm speaker?
  6. Today was the anual Tree Street Yard Sale event
  7. Florida ? what did I get ?
  8. 26HU5's vs 26DQ5's
  9. VoltCraft AT-400?
  10. Sonic differences: 45, 2A3, 300B, 845, 211
  11. Need help wiring a pot for cathode adjustment
  12. Sound of the 6SN7?
  13. A mystery device
  14. Plate curves... Ic2 & Ib?
  15. How to choke load for big voltage swings?
  16. 6550 SE design, please comment.
  17. "Impedance" of the output transformer
  18. Triode-wired small signal pentode question
  19. Calculating output impedance
  20. 6JM6 Infomation for Pete Millett's DCPP Amp
  21. Tube labeld ETBB
  22. Heaters wiring help!
  23. What do you guys think of this IR volume control?
  24. Can you send me the Aikido 5687 user manual
  25. Cathode Follower output cap
  26. EL84 rebuild suggestions
  27. voltage divider in WE91 driver
  28. Power Tx Myth?
  29. voltage multiplier based on SS trafo - LONG
  30. What tube for QUIET phono pre??
  31. A&R 8ohm 4008 output transformer
  32. How does DRD Ultrapath Work?
  33. Russian 6H2p-E??
  34. Started work on my stereo 7027a PSE amp
  35. Mono Tube Comp for analog kick drum
  36. Line stage preamplifier
  37. Trying to select the Aikido components
  38. X-PRE musical fidelity preamp. need help modifying
  39. 6C33C & Borbely Question
  40. 12BH7A in common cathode
  41. Sneak Preview: 9 Band Active All Tube EQ
  42. Bought a set of Greenlee conduit punches for my latest project - WOW!
  43. "Universal" octal amplifier?
  44. MU follower - distortion
  45. lighting transformers 12V
  46. Chinese 6N3 preamp questions
  47. Why are Chinese preamp knockoffs so popular?
  48. 4K7 OPT suitable for 6550/KT88?
  49. Transformer question - 110 v and 25 v from 1 secondary?
  50. About loadline again, how to choose load and current
  51. Parallel Output Transformers
  52. 6SN7 / 6V6 power amp : very odd behavour
  53. HV mA Spec on Large RCA Power Xfmr?
  54. Is the Aikido too 'bright'?
  55. Has anyone put the Glassware phono & line amps in same box?
  56. High impedance balanced output: how long the cable?
  57. Data Sheets
  58. Can I use a LM317 bias on lower cathode of SRPP?
  59. AU-34 Output transformer replacement question
  60. The new KT120 from tungsol
  61. em83 questions
  62. Push-pull PCL84 schematic and a question
  63. confused on power transformer ratings
  64. C3g:GM70:GM70 schematic advice
  65. Can someone explain Load Lines?
  66. Humming from WCF but not SRPP
  67. Gas regulator tubes
  68. My B&K 707 sensitivity seems wonky
  69. Lowrey LC1 B schematic wanted
  70. Complete tube amp novice got a few questions!!
  71. jacked up the bias...WOW!
  72. Looking for PP 7027a shematic
  73. So, if it's not DIY Gene, then what?
  74. What driver tube for 200Vrms?
  75. Tube socket purchase
  76. Something I found interesting a while ago!
  77. Eico HF-22 Circuit
  78. SEDHT amp - decisions decisions
  79. Confused with designing
  80. Digitally controlled analog attenuator
  81. Purchased my 1st valve amp and can only get one channel working, please help!
  82. Another silly tube yesting question
  83. potentially very stupid questions....
  84. Tube rectifier: AZ1, AZ31, AZ50 vs 5u4
  85. Tube Square-Law, what and how to set up?
  86. Need help finding schematic. Conn 720
  87. OPT for parafeed SE
  88. Anyone else tried an opamp as a driver?
  89. e180f/6688 pentode operting points
  90. power supply reassignment problem
  91. Mains power transformer on S5 K-12 kit hums?
  92. Oriole OPT
  93. 26DQ5's vs 26HU5's vs 6KN6's and transformers
  94. SRPP power using power tranny as OPT?
  95. Need guidance with heathkit SA-2 refurbish/mods
  96. B+ discharge times!
  97. 26HU5's....and a confession
  98. Bell Sound Systems Pacemaker Model 2220
  99. Any thoughts on this transformer on eBay?
  100. Need some help figuring out a Wurlitzer 6240.
  101. Bypassing cathode resistor on pp power tube
  102. Is it safe to use a 8BQ5 in place of a 6BQ5 in a guitar amp?
  103. TRIODE Voltage amp + Power OP output follower
  104. Cats and tube-a-holics
  105. Replace Tube Rectifier With Weber CC?
  106. 717a 2 stage SE amplifier
  107. Thoughts on Oatley K282 Valve Preamp?
  108. SS rectifier for SimpleSE and others...
  109. Need match Pr KT-88
  110. EL34 PP - again !!!
  111. S5 K-12 Kit sounds excellent with iPod, but relatively low volume with turntable?
  112. Finished K-12 Kit with cedar / brass chassis (pics)
  113. Groove Tube Dual 75 schematics
  114. Tubes HOT!
  115. Meng volume pot problem
  116. Use P-P OPT for SE?
  117. Safety ?
  118. Film caps always better than lytics?
  119. Valve Preamp for voice / guitar purpose
  120. 851 set?
  121. dual cathode follower problem
  122. Question about connecting grounds
  123. Is it okay for capacitors to be close to the main power transformer in S5 K-12 Kit?
  124. Fisher 500C Schematic
  125. looking for PP 6l6 schematic
  126. Muiscal Paradise MP-301 6V6 amp.
  127. First Build - PS Voltage Question?
  128. Need help about an hybrid amp circuit
  129. Radio to guitaramp conversion hum problem
  130. Pioneer SX-348 - Service manual?
  131. Tube PS for mic preamp Help
  132. Add rectifier tube to yaqin mc10l? What size is best?
  133. global negative feedback schematic
  134. Signal transformer question
  135. What speaker system for tube amplifier
  136. 39/44 Tube
  137. tube-aholics anonymous ?
  138. 12AX7 heaters from 9VAC transformer
  139. Cant stop Aikido Humming
  140. Suggestions for rotary switches
  141. Question about potential transformer placement in K-12 Kit
  142. Extra pins on replacement potentiometer for K-12 tube kit?
  143. Instrument tube / valve preamp
  144. SRPP - issues understanding how to increase current
  145. ARC Power source+Marantz 7C(PCB edition)
  146. Repair and adjustment tips
  147. trimax output transformer TA2444
  148. anyone recognize this valve?
  149. Microphone Preamp design
  150. 6CM5 hi-fi amplifier
  151. Building an amp try #2
  152. Can the 6S33S/6C33C be mounted horizontally?
  153. A heptode question
  154. Looking for a 807 amp with 4 pairs of 807's
  155. pp output transformer miniblok2
  156. John Swenson's BDT preamp - finally!!
  157. Voice of Music console 816
  158. Steve Bench 1 tube reg in all glass
  159. Conn Caprice 427 needs new 12AU7 tubes—advice?
  160. Position of Iron in Can of HK Citation II Output Transformers
  161. Bottle size,does it matter in matched quads?
  162. Heater Pots?
  163. Current calculation from datasheet
  164. Any one ever seen this amp?
  165. Guiguang 300B for 300Beast.....
  166. FLEA PPP, all ecc99
  167. Well, it is time to start thinking about winter projects. GM70
  168. aghhh is my tube okay?
  169. Grid Bias provided by transformer secondary winding, what is this stuff about?
  170. Zener regulated supplies
  171. OPT fore drive ribbon speaker directly; why not ?
  172. van Dorn's Octode design - recommendations for a 10W/ch version
  173. Outrageous Speaker/Amplifier Idea
  174. Anyone ever made the EL84 P-P circuit referenced on the Tubecad Journal site?
  175. Scratchy volume pot on TAD DIY deluxe reverb
  176. Cathode Follower ideas please.....
  177. Anyone used the NTE1866 VU LED driver?
  178. Any potential problems when using a combo potentiometer / power switch on a K-12 kit?
  179. Help needed understanding component values.
  180. Separate passive pre and monoblocks?
  181. My new diy site
  182. Valves and musical instruments
  183. My DC Darling
  184. Question - add LED power indicator to Aikido pre
  185. Colorful amps
  186. Aikido Cathode Follower
  187. Converting a dirty channel to clean?
  188. A few questions about transformer placement in an S5 K-12 tube amplifer
  189. Bogen AP30 and new member
  190. Adding Clean channel to AX84 P1-Ex
  191. Echocord Super 62 Feedback at Low Levels?
  192. Direct Coupled 76/5687 linestage
  193. Be kind to your 5AR4 and input capacitor
  194. New Self-Powered ROHS compliant electronic device invented!
  195. Making my first hifi tube amp.
  196. Variation on Rodīs bias servo
  197. "No Light District" P-P amplifier
  198. What kind of tubes do i have?
  199. Understanding Scope Trace Square Wave
  200. Single tube SE with EML-20B
  201. LED bias cathodyne
  202. Diagnosing hum???
  203. Posted tube microphone preamp design
  204. Finally put the Aikido in a proper chassis
  205. Tube Preamp / Headphone amp question...
  206. Phono Preamp
  207. Initial 'DQ5' testing
  208. Free Tube Amplifier Schematic Diagrams
  209. Testing with DMM
  210. The Impressive Vetruvio GM70 SET amp.
  211. Fender Twin Reverb channel 2 has no output
  212. 6sn7 subminature??
  213. One channel louder than other
  214. How to use RCP 802A tube tester test B9A tubes?
  215. phono amp question - adding input tx
  216. Ebay "clones" PCB
  217. Phase splitter and balance input
  218. At Last....First Build Complete...6V6/6SL7
  219. Amplifier input
  220. The Tube Maze
  221. Variable Harmonizer
  222. Vetruvio Audio; new competition for the Chinese?
  223. Transmitting tube-driven transmitting tube SET amp?
  224. Circlotron questions
  225. Home Grown tube amps
  226. LT108 Oscillation sounds like tube rush/white noise
  227. Cool looking tubes anyone...
  228. st70 standby switch/cathode stripping SS rect
  229. BoM for an RH84 mono build?
  230. Signal hum ideas please.
  231. E88CC turbo
  232. SRPP vs. plate loaded, musicality and details
  233. 300B/EL156 Amp
  234. Just new one .all new layout.
  235. Am I correct????
  236. Need help identifying this amp...
  237. The Maggie factor
  238. Help wiring up anLED Bar
  239. E810F/7788 Pinout name/number?
  240. Need some help with a mercury 1200 tube checker
  241. Adjust cathode bias pot - both channels move together. Why?
  242. Building a 45 SET
  243. Stereo Pententometer Questions
  244. Looking for oscilloscope recommendations.
  245. dm160 magic eye help
  246. Tube stage for acoustic guitar?
  247. Zener heater regulator
  248. Dead Time - Correcting for it
  249. ARC Power source+ 12AX7&12AU7 Pre-amplifier
  250. PTC Thermistor for auto fixed bias

Content Relevant URLs by vBSEO 3.3.2