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. New Production Tung Sol 6550 Tubes - Opinions
  2. Looking to build a tube integrated
  3. Which high power CCS for output stage?
  4. Using a mosfet to drop B+?
  5. drawings vs. schematics
  6. New TEK Scopes
  7. Transfos Anyone?
  8. Ripple guidelines for power supplies
  9. Mains transformer orientation
  10. New Nightmare (Guitar Amp)
  11. AMD tube integrated tube amp
  12. Using Choke in LCRC filter in power supply
  13. Need good current sink JFET or MOSFET?
  14. Setting Up a Circuit for Testing
  15. 6H6 question
  16. Kennedy Tube Audio Website Hijacked
  17. Yet another 12B4 line stage, or is the 12B4 better than the Grounded Grid.....
  18. transformer for Philips AG9015
  19. Real McTube Help
  20. Where are the 307A / VT225 amps?
  21. Anyone have a single el84 PPP OPT?
  22. Finished First Guitar Amp
  23. Using an old power transformer as a choke?
  24. Convergent Audio Technology SL-1 Scematics
  25. Poinz 6AQ5 Linestage
  26. microphone preamp
  27. Ticking noise, need help.
  28. Humm in my preamp...
  29. Enclosure suggestion/questions
  30. Calculating Tube Parameters +SPICE
  31. Loudspeaker for TUBE DIYer
  32. Tube ID 18R-AL1?
  33. 6l6gc Tube Drive
  34. Need a little help, TT and PC? Amp Kit?
  35. 12ax7 preamp
  36. 308/ecll800 Lorenz
  37. How did you do your Aikido?
  38. Thoughts on this 807 design
  39. Rectifier compatibilty
  40. Tube amp for biamped speaker
  41. 12ae6, 12fk6, 12fm6 diode specs
  42. Any software out there for taking the headache out of composite loadlines?
  43. Driving a single 6L6GC with 12AX7
  44. quick 50c5 to play around with
  45. A question about distortion in SE vs. PP designs:
  46. Need help on first tube amp rebuild -trans problems
  47. HAMMOND 125ESE Transformer WIRING
  48. preamp ps problem
  49. What does everybody really NEED???
  50. Marantz 7C still good today?
  51. Magnavox Chassis #196-55 Resistor Question
  52. 6BL7
  53. altec/peerless mystery amp
  54. 6gk8 triode pentode tube data
  55. Low Current Source
  56. Parallel Single-Ended Questions
  57. Tube power ratings
  58. 6DJ8 or 12xx7 for hybrid amp (Monarchy)
  59. What did I do wrong with LEGACY????
  60. seeking: tube for a SEP parallel feed like an EL84, but with a lower Ra
  61. Tube Tracer
  62. a question of tube behaviour
  63. Which tube? ECC82, 6SN7 or 6SL7
  64. oscillator
  65. The Covi Mark II Circlotron Amp
  66. HT transformers and polarity
  67. Hammond 156C - good Plate choke load??
  68. Music Man sixtyfive reverb head needs help!
  69. DIY pre-amp kit vote
  70. 6550 tubes
  71. Is the 6N6P a direct substitute for the 5687?
  72. SE amp using 1619 instead of 45 triode
  73. Akai M-7 Amp Schematics?
  74. asl 845 monos mods
  75. 3 stages... Two Power Supplies
  76. RCA 7094 tetrodes...
  77. KT88 push pull
  78. Tube amp fan?
  79. Ping gerd.....
  80. Need help finding Sovtel EL84M tubes
  81. Min. current draw for choke input?
  82. Passive RIAA with tubes
  83. Oscillation Mystery
  84. unison research P30K schem?
  85. Can I use a 5R4 GY in place of a 5AR4?
  86. Seeking for all Norman H. Crowhurst papers
  87. best way to elevate heater?
  88. Tube Load Line
  89. Homemade Vacuum Tube
  90. beardm70mk2-want less b+
  91. Need help with tube test data - fast
  92. Show me a schema 6Pi3C-E Push-pull
  93. Help about the 6SN7/5692 linestage
  94. Active load output stage
  95. Power supply question
  96. EL34 Triode Mode - G3 where?
  97. Is "reforming" Electrolytic Capacitors necessary?
  98. Screen grid driver for PL519?
  99. Best replacment for a 6F2
  100. Please Tell Me How To Modify And Upgrade My Music Angle 845 Amplifier?
  101. Pentode to Triode trick.
  102. 6550 making a Popping sound?
  103. Pie-eyed and puzzled...
  104. How about this schematic
  105. tube disorder
  106. PC choke in a preamp ?
  107. selective tone control
  108. time for a laugh
  109. Another New Build Pictures ( G' Amp )
  110. Help finding: 7-pin PCB socket, 90deg horizontal
  111. LC vs. CLC Theory
  112. Input transformer & volume pot
  113. MC34-B Quit working suddenly (newb)
  114. Golden Tube Audio 300B se
  115. Wanted: Pioneer sa-810 schematic
  116. se el34 finally
  117. Tube design question
  118. Marantz 8 clone build
  119. Active RIAA Eq for tubes- Brian Clark's article
  120. pre hums - even unplugged!
  121. Push Pull Preamplifier anybody?
  122. 6AN8 tube question
  123. Distortion in Fisher 800C
  124. 20% versus 43% screen tap
  125. Van der Veen transformers
  126. Want to upgrade Velleman K8020
  127. KT88 Power supply question
  128. TX coupled, pentode linestage
  129. phase splitter question
  130. New preamp project is online
  131. Newbie: Which amps to build?
  132. Which valve, 5842 (417A) or 6H30
  133. How do you punch out your chassis holes?
  134. recommend a 5Y3 based bass guitar amp?
  135. Help identifying tube tester
  136. paralelled tube
  137. ECC88 at 12 volts
  138. azarus preamplifier schematics
  139. Which valve amp do I keep?
  140. Favorite Driver for 845
  141. Somebody has that magazine?
  142. modify parallel push-pull EL84 to single push-pull
  143. How long it will last?
  144. Hurricane Wilma
  145. Suddenly, no output from Copland CTA-501
  146. 807 Audio Amp Progress Report
  147. Choke induced Hum
  148. Wim's DC EL84 amp
  149. Drivers for a KT88 pair
  150. what do u think of these tubes?
  151. 12BH7 spice 3f4 model
  152. Clone Marantz M7 Line Amp
  153. PIO caps question
  154. New Build Pics (guitar Amp)
  155. 6HF5 sweep tube single ended amp
  156. My first DIY
  157. Winding A Interstage Transformer
  158. help building 12ax7/el84 amp
  159. PSE schematic
  160. Using PSU Designer to calculate DC filament supply
  161. Dynaco stereo 70 driver board
  162. Excellent and cheap DIY INTERSTAGE!
  163. Need Advice with Timer Relay Shut Off
  164. standby switch
  165. Purpose of small cap across PSU rails?
  166. 6SL7 + EL34 SE Audio Amp
  167. guitar tube amp as home stereo
  168. 6C33 fixed/auto bias ?
  169. Long Tail and Local feedback
  170. I look for EAR 859 pictures.
  171. Designing a simple tube opamp?
  172. Difference between Hammond 200 and 300 series
  173. Ultrapath Cap
  174. where to find 600v 18awg wire??
  175. Suggested power supply B+?
  176. Variable Impedence Mic Preamp
  177. Help me stop my preamp from farting!
  178. Just bought some of those Russian paper/oil caps off of ebay
  179. The Valhalla power amplifier project
  180. help! EL84's dying
  181. Could check this pentode-mu stage thingy for me (disclaimer* it is for a gutar amp)
  182. ASC Polypropylene And Oil Capacitors
  183. pots... log or linear?
  184. Guitar Amp Hum Question
  185. Cracking sound through speakers.
  186. EL84-PP - Why just 5W?
  187. Brook12a schematics...
  188. LongTailedPair gain -> how to calculate?
  189. Wiring secondaries of two power trafo's in parallel?
  190. RIAA "Tube Simulations"
  191. Has anyone built this 'Svetlana Six Pack' ?
  192. updated pics of tube project
  193. help 12FV7 datasheet
  194. Why does my oversized preamp trafo gets much too hot?!?!?
  195. 6sn7 pre
  196. 12AY7/6SN7 preamp PSU check
  197. CT design trans application
  198. Shindo schematics?
  199. Octal Hagerman Cornet Experiences
  200. My first (guitar) amplifier
  201. Zenith AM/FM C835 tube Radio schematic
  202. Oh man, my telefunken stoops...
  203. 42 single ended
  204. EL34 Feedback circuit
  205. Spice model for EL86/6CW5
  206. Ditching some High Voltage
  207. Newbie want to build simple tube preamp&psu!need help!
  208. Phono Pre-Design Input
  209. TS Audio 211-based monoblocks
  210. HV Direct Drive tube amp.
  211. A question about Cathodyne/split load/concertina PI's
  212. Kofi Annan in: "Hummin' Trafo Blues"
  213. Rattling Tube
  214. Berning output buffer
  215. Tube PSU Question
  216. JoLida Envoy PreAmp or DIY?
  217. Looking for Audio Note P1SE schematics.
  218. Which SE-ECL82 amp to build?
  219. PSU Help
  220. Help for stabilisator Data
  221. How much ripple on B+ is allowed?
  222. Typical 2A3 hum?
  223. PV10 PS transformer
  224. 300B Filament Voltage Range
  225. Mullard EL34-Authenticity Verification
  226. Fading or Frying Fender Clone Issue
  227. Philips V30M amplifier
  228. PWM power supply???
  229. Regulated psu for tube preamp
  230. About to start a new project: PP 6CK4s...
  231. Komuro DC 300B crct w/ 50dht?
  232. Anyone out there try a SEPP OTL guitar amp??
  233. DIY speaker attenuator?
  234. So what are some good 7-pin, hi mu, low noise/microphonic tubes??
  235. Audio meet pics from this past weekend
  236. Audio Note M7 Line Preamp??
  237. PP 7591 amp
  238. Tube op amps
  239. Please tell me how to upgrade Music Angel KT88 amplifier?
  240. Do I want a fan?
  241. 3rd Aikido?
  242. More Questions about A.Wrights PP1C
  243. 7591s flashing on start-up?
  244. first amp build... wiring questions
  245. pentode aikido driver for 300b
  246. Question about single NOS triodes in cascode for fun
  247. oscillating PP EL84 amplifier
  248. 6H30P based cathode-follower schema kindly requested
  249. Cathode follower question
  250. Bunch of old parts, worth anything?