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. Converting Eico HF-81 to a simple PP EL84 (pics incl.)
  2. 12at7 dc coupled to 12at7 cathodyne to drive EL34
  3. First Tube Help
  4. ampex 6793 stereo
  5. RCA Victrola 8V91
  6. what to do with these tubes? (6AQ5/6AR5)
  7. Sylvania 45C14M advice
  8. Re-designing 6DJ8 circuit for the 6CG7
  9. Hi fi kits
  10. bias capacitor
  11. Question re: Signal Ground versus HT ground
  12. Schematic to a friend
  13. Newbie question about transformers
  14. Request for suggestions. Akai M8 mono amp schematic validation.
  15. Rectifier
  16. Source for transformer parts?
  17. odd order harmonic squelching?
  18. Best Current Production 6550 / KT88
  19. Wharfedale W12 output transformers
  20. Are we committing suicide?! (Asbestos in vaccum tube base)
  21. Help me to Identify this Tube
  22. GU50 socket blues
  23. New 18W build el84/12ax7
  24. Why a follower in a parafeed triodeamp?
  25. Heads up for Australian tube amp diyers
  26. build new amp from 2 vintage tube amps?
  27. Sansui AU-111 rebuild and need some help
  28. Interstage/Input Transformer
  29. VALVEKING ROYAL8 with 6p14p-EV
  30. Ergo Ella PP Amplifier Wiring
  31. 6DX8/ECL84/6F3P Baby Huey
  32. Old tube amp info?
  33. MEIXING MING DA MC 2006 Phonostage schematics
  34. Problem with a Peavey Classic 50
  35. Just what the world needs - another EL84 amp
  36. Help me pick el34b tubes
  37. heathkit SA2
  38. Need help on RIAA
  39. GU50 plate curves
  40. What tube is this?
  41. Help with GZ34
  42. Need help in modifying Roberts 770 monoblocks
  43. PP and PPP
  44. ECL82 Single Tube Amp
  45. circuit idea
  46. Need Telefunken Hymnus 5438 Dial Glass
  47. Bias probes/Am I getting true readings
  48. How to measure output power
  49. Oddblock Wooden Case
  50. Amplifier Quandary
  51. Fuse blows instantly
  52. Looking for a fairly simple Hi gain tube pre amp project
  53. Best 2a3 PP OPT.
  54. Sharing cathode resistor and capacitor
  55. Power tubes in cascode for output section?
  56. good tube service tech in Los Angeles?
  57. Proposal for a new sticky thread
  58. The History of the EL-34 and other Pentodes and Beam Tetrodes.
  59. PCF what?
  60. stupid question about heater wire to ground
  61. OTL All American Five? (or Ten)
  62. Scored a very nice H H Scott 272!
  63. Simple DIY Stereo Tube Amp with around 20W
  64. Maton Amp
  65. New Tech
  66. LS8 pre kit as an output stage for DAC?
  67. Japanese Valves
  68. B+ delay for DHT amp
  69. QQV03-20A/CV2799
  70. 0,22 0,33 0,47.....uF
  71. Most powerful SE DIY design?
  72. 420vdc supply for a tube amp
  73. PSE 2a3 operating points?
  74. Ju-Jutsu: The Ultimate Monoblock
  75. Looking for Phono Stage ...
  76. Finished my Fisher 460t-thanks
  77. Datasheet Cpk values
  78. Eico635 tester
  79. 6p3s...
  80. Help with Amp Salvage
  81. 808 SE Build
  82. how to bias my rebuilt dynaco st 70
  83. Want help - RCA Tube Manual RIAA Phono Stage
  84. Tube Pre-amp for both CD and Phono inputs
  85. Cascode Driver Oscillation
  86. 872b or 6gj5a for a homebrew bass amp
  87. how does it sound and perform?
  88. Bootstrapped long tail
  89. Thorens TEM 3200 clone
  90. Identifying this RCA Transformer
  91. Tube burning
  92. Add Standby Directly after Rectifier, or After First Filter Stage?
  93. Help with some tube ID
  94. CCS power amp bias
  95. this is EL34 tube of what model?
  96. Looking for constructive criticism on my first design
  97. Audio note kit 1 vs Meishu
  98. Tube Amp Gain V.S. RF Gain
  99. Kool-mu material for building audio transformer
  100. Buzz/Hum in Matrix amplifier
  101. Optimation PA-250AC Lab-Grade Audio Amplifier
  102. RS1003 in SE triode-UL monoblocks
  103. Bypass capacitors in Tube amps
  104. Basic question re: gNFB around 3 stages
  105. James PP Audio Transformers, any good?
  106. Seeking advice for tube amp kit on,seems to be, chinese site
  107. Tube pricing from 1981
  108. 6e5p WCF headphone amp with no cap!
  109. "How it's made" vacuum tubes..
  110. Citation I and IV phono schematic query
  111. GS-4V High-mu russian triode for RIAA preamp
  112. good source for amp chassis in europe?
  113. Help identify and replacement of ? resistor
  114. New tube amp diy kit required power?
  115. Decoupling DC heater supply between valves..benefit?
  116. The Aikido Comedy: Straight Talk
  117. Recapping tube preamp questions
  118. A tube amp that's actually a tesla coil.
  119. Tube "Orientation"
  120. 18 watt tremolo vvr
  121. Pre amp output, would this work?
  122. Aikido Power Amp.....Possible??
  123. 12AX7 questions
  124. 6550 PUSH-PULL
  125. CCS at plate? Unknown schematic part
  126. Most odd grid choke behaviour.
  127. Spec for Altec TP-404 Transformer
  128. why do wimpy drivers for 2A3 work as well as they do?
  129. Seeking advice on Tube buffer / pre-amp
  130. 8x Push-pull KT88 class A in triode mode
  131. Tube Pre dull into Tube Amp - cause ?
  132. FINALLY I can start building my GM70
  133. Russian triodes ГИ-15Б arriving in a few days
  134. Cap or resistor
  135. KT88/PP driver confusion
  136. Simple SE GU-50
  137. Darling 1626
  138. 01a DHT Preamp
  139. Suitable tubes for Gomes output
  140. phono line stage project
  141. Whats wrong with this circuit?
  142. Any Newcomb Gurus.?
  143. Preamp Tube MU Level?
  144. SRPP Paraccordion topology ?
  145. Replacing 6922 with 6FQ7 in Conrad Johnson ET3 preamp
  146. Modification of a Chinese KT90 PP amplifier
  147. Tricky Headphone Amp design for AK4396
  148. How to know voltage bias adjustmentwith this data?
  149. Strange Stability Enhancement Trick
  150. has anyone bought tubes from http://www.tangotubes.com/
  151. “Earmax / G3 / Morgan Jones / Cavalli” Headphone Amp Reissue with 6SN7 Steroids
  152. Ever heard of British transofmer company "Ro"?
  153. A friend gave me some random tubes...
  154. Replacement for 6e2 without vu
  155. PP GU50 triode strapped project
  156. Tube VAS stage questions???
  157. OT impedance help: 9.8 vs 8k
  158. popping & crackling noise from restored valve AM radio
  159. Choosing 6550 PP Output Transformer
  160. Reversing Interstage Transformer
  161. Aikido 9 pin All in One Build
  162. KT88 PP UL Design Help Needed
  163. Cayin A-300B schematic needed
  164. Please Recommend a Preamp!
  165. Which Antek transforms to use
  166. Integrated Amp as Preamp and Subwoofer amp
  167. Uses for 715C Pulse Tetrode
  168. PP KT-88 w/866A MV HT Supply
  169. EC88 (6DL4) NOS Mullard - any use at all?
  170. Advice sought on thermionic headphone amp
  171. Eico HF-81: Input Selector bypass
  172. 12b4 bass rolloff problem
  173. No Right ch sound on yaqin mc10l
  174. tester causing bias to rise?
  175. Heaters & Filaments: AC vs. DC
  176. Old HP power transformers... need some wiring advice!
  177. Old HP power transformers... need some wiring advice!
  178. RCA RS177H just dosen't sound right! Caps?
  179. silicon or tube rectifier in an EL34 SE
  180. Help original 300G LEGACY
  181. 813 Tube-Steak!
  182. Basic 12AU7 heatrr question
  183. Shipping a vacuum tube to China
  184. 6DJ8/ECC88-SRPP Tube Preamplifier
  185. Help needed: hum noise in Eimac 250TL driven by 75TL Single End Amplifier
  186. Found tons of Tubes,and many other parts
  187. Ampeg B15 Heritage Clone Help
  188. EZ80 Data Sheets, R-Lim and Max Cap
  189. Filament Voltages CT vs Non-CT
  190. Troubleshooting help needed
  191. What is it? Tube guessology
  192. Bass & Treble controls, or rather lack of.
  193. Quicksilver 8417 Power Supply Question
  194. Why a sudden distortion in treble of this SET amplifier?
  195. 5f1 Champ grounding
  196. Antitriode PP with EL34
  197. How to calculate Pout for Push Pull design
  198. Newbie Question - Power Transformer vs Isolation Transformer
  199. All tubes red plating
  200. Exceeding bias voltage?
  201. Vacuum State RTP Preamp Problem
  202. Alfred Morgan Tube Preamplifier
  203. 845 vs GM70
  204. Looking for project suggestions - 12au7 pre-amp?
  205. Contemporary tradition breaking amp schematics.
  206. ul - triode coupled screen grid resistor
  207. Optimum driver valve for an interstage-transformer-driven SE 300B
  208. 6C33C
  209. Soundcraftsmen 5050
  210. Tetra Phono Question
  211. WF tube
  212. Opt laminations isolation
  213. Heretical Source
  214. Broskie auto bias
  215. heater wiring - the Good the Bad and the Ugly
  216. AC Line Filter
  217. Counterpoint SA5000 Help
  218. Problem with ECC83 measurement values - please help
  219. Newbie Bias help ?
  220. AV305m AVVT
  221. Pot mechanical resistance and restoration..
  222. HMV Little Nipper mantle radio = 1 STEREO
  223. What's the simplest way to adjust filament voltage?
  224. GDAP-06
  225. Audio Note L6 - Schematic?
  226. Preventing HV flashover on socket pins
  227. Best "Vintage" Stereo Pres that SoftClip and lotsa Harmonics
  228. SE with PP OPT's?
  229. 12ax7/12AT7 Recommendations
  230. HELP: Eimac 75TL amp high frequency roll off
  231. unison reserch s8, let's build it!
  232. Where do super high end companies get their transformers?
  233. Tube Tester Panel Meter
  234. Attic find AMP
  235. Help getting Imax and Eb approximations for a push-pull amp
  236. Is this amp OK to buy, or is this a problem?
  237. Swirling Harmonics, can it be described
  238. Line stage with u-follower and nfb
  239. Newbie looking for help, pre-out to tube amp.
  240. Unison research integrated ampliphier schematics
  241. FET CCS anode load and RFI/oscillation.
  242. Old schematic
  243. Newbie Looking for Replacement OPTS Motorola Console Amp
  244. Merlyn- May AudioXpress
  245. How to clean tubes?
  246. does the 3A5 have the stones to drive a 2A3?
  247. New amp: 13DE7 SE hybrid
  248. My amp is motorboating, improve it with b+ regulator ?
  249. Can you identify these amps?
  250. Sowter SA01 - anyone used it ?

Content Relevant URLs by vBSEO 3.3.2