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

  1. Modification of a Chinese KT90 PP amplifier
  2. Tricky Headphone Amp design for AK4396
  3. How to know voltage bias adjustmentwith this data?
  4. Strange Stability Enhancement Trick
  5. has anyone bought tubes from http://www.tangotubes.com/
  6. “Earmax / G3 / Morgan Jones / Cavalli” Headphone Amp Reissue with 6SN7 Steroids
  7. Ever heard of British transofmer company "Ro"?
  8. A friend gave me some random tubes...
  9. Replacement for 6e2 without vu
  10. PP GU50 triode strapped project
  11. Tube VAS stage questions???
  12. OT impedance help: 9.8 vs 8k
  13. popping & crackling noise from restored valve AM radio
  14. Choosing 6550 PP Output Transformer
  15. Reversing Interstage Transformer
  16. Aikido 9 pin All in One Build
  17. KT88 PP UL Design Help Needed
  18. Cayin A-300B schematic needed
  19. Please Recommend a Preamp!
  20. Which Antek transforms to use
  21. Integrated Amp as Preamp and Subwoofer amp
  22. Uses for 715C Pulse Tetrode
  23. PP KT-88 w/866A MV HT Supply
  24. EC88 (6DL4) NOS Mullard - any use at all?
  25. Advice sought on thermionic headphone amp
  26. Eico HF-81: Input Selector bypass
  27. 12b4 bass rolloff problem
  28. No Right ch sound on yaqin mc10l
  29. tester causing bias to rise?
  30. Heaters & Filaments: AC vs. DC
  31. Old HP power transformers... need some wiring advice!
  32. Old HP power transformers... need some wiring advice!
  33. RCA RS177H just dosen't sound right! Caps?
  34. silicon or tube rectifier in an EL34 SE
  35. Help original 300G LEGACY
  36. 813 Tube-Steak!
  37. Basic 12AU7 heatrr question
  38. Shipping a vacuum tube to China
  39. 6DJ8/ECC88-SRPP Tube Preamplifier
  40. Help needed: hum noise in Eimac 250TL driven by 75TL Single End Amplifier
  41. Found tons of Tubes,and many other parts
  42. Ampeg B15 Heritage Clone Help
  43. EZ80 Data Sheets, R-Lim and Max Cap
  44. Filament Voltages CT vs Non-CT
  45. Troubleshooting help needed
  46. What is it? Tube guessology
  47. Bass & Treble controls, or rather lack of.
  48. Quicksilver 8417 Power Supply Question
  49. Why a sudden distortion in treble of this SET amplifier?
  50. 5f1 Champ grounding
  51. Antitriode PP with EL34
  52. How to calculate Pout for Push Pull design
  53. Newbie Question - Power Transformer vs Isolation Transformer
  54. All tubes red plating
  55. Exceeding bias voltage?
  56. Vacuum State RTP Preamp Problem
  57. Alfred Morgan Tube Preamplifier
  58. 845 vs GM70
  59. Looking for project suggestions - 12au7 pre-amp?
  60. Contemporary tradition breaking amp schematics.
  61. ul - triode coupled screen grid resistor
  62. Optimum driver valve for an interstage-transformer-driven SE 300B
  63. 6C33C
  64. Soundcraftsmen 5050
  65. Tetra Phono Question
  66. WF tube
  67. Opt laminations isolation
  68. Heretical Source
  69. Broskie auto bias
  70. heater wiring - the Good the Bad and the Ugly
  71. AC Line Filter
  72. Counterpoint SA5000 Help
  73. Problem with ECC83 measurement values - please help
  74. Newbie Bias help ?
  75. AV305m AVVT
  76. Pot mechanical resistance and restoration..
  77. HMV Little Nipper mantle radio = 1 STEREO
  78. What's the simplest way to adjust filament voltage?
  79. GDAP-06
  80. Audio Note L6 - Schematic?
  81. Preventing HV flashover on socket pins
  82. Best "Vintage" Stereo Pres that SoftClip and lotsa Harmonics
  83. SE with PP OPT's?
  84. 12ax7/12AT7 Recommendations
  85. HELP: Eimac 75TL amp high frequency roll off
  86. unison reserch s8, let's build it!
  87. Where do super high end companies get their transformers?
  88. Tube Tester Panel Meter
  89. Attic find AMP
  90. Help getting Imax and Eb approximations for a push-pull amp
  91. Is this amp OK to buy, or is this a problem?
  92. Swirling Harmonics, can it be described
  93. Line stage with u-follower and nfb
  94. Newbie looking for help, pre-out to tube amp.
  95. Unison research integrated ampliphier schematics
  96. FET CCS anode load and RFI/oscillation.
  97. Old schematic
  98. Newbie Looking for Replacement OPTS Motorola Console Amp
  99. Merlyn- May AudioXpress
  100. How to clean tubes?
  101. does the 3A5 have the stones to drive a 2A3?
  102. New amp: 13DE7 SE hybrid
  103. My amp is motorboating, improve it with b+ regulator ?
  104. Can you identify these amps?
  105. Sowter SA01 - anyone used it ?
  106. Mikael‑Abdellah‑SE‑KT88 Bias & Voltage readings Help?
  107. Resistors and combinations
  108. thr light in pcl82
  109. Bogen L330 - Worth restoring?
  110. Supro model 24 amp transformers
  111. Those Magnificent Television Tubes
  112. Demagnetizing OPT?
  113. Real DIY fun hybrid testing.
  114. Extreme hum in EQ output
  115. 46 triode-strapped DHT spice model
  116. SET output impedance vs speaker impedance
  117. Help with layout of tube preamp
  118. eico HF-65
  119. Wirewound bias pot problem.
  120. Driver for Telefunken RS242 in class A2
  121. Help on my signal generator
  122. another tube fact or fallacy
  123. Gap in Transformer Lams - OCD Check
  124. how to test...
  125. chinese tube amp
  126. tube/valve pc-80
  127. GM-70 All done
  128. Peavey 60/60 classic series schematic
  129. preamp for reciever?
  130. Designing a Tube Rectifier Circuit
  131. Bogen RP40A transformers....what to build with them?
  132. Harmony guitar amp restoration questions
  133. Heads Up for "El Cheapo" Builders
  134. replacing kt66 valves
  135. Help with power transformer identification
  136. 6-8x el84 Per channel
  137. To vary a signal pentode to triode in stages
  138. I have 2 choices for resistive load, need opinions.
  139. Tesla PCC88 7DJ8 dual triode - Help Needed.
  140. PP6550
  141. LT1083 interesting startup problem
  142. ECC33 Driver Stage
  143. Hiraga's Improved Concertina Phase Splitter
  144. 274B a direct replacement for 5AR4/GZ34?
  145. Help power up akai M8 amps
  146. Sonic Frontiers Power 3 Help!
  147. ImPasse Preamp now online
  148. Power supply for tube preamplifier with PCC88
  149. Don't know where to start...
  150. DIY noob
  151. 300B amp cathode bypass
  152. Amp hum with Preamp off
  153. First Project with these tubes
  154. 7189a socket rewiring
  155. Hybrid rectifiers in PSUD2
  156. Feedback / experience wanted on building the Audio note L4 Integrated EL34 PP Amp Kit
  157. About 6AS7BTL Amp
  158. Output Stage Protection Circuit
  159. Silly basic layout question - AC heaters
  160. heater voltage variation for special tubes
  161. Want to build a 807 Vixen.. Looking for help.
  162. Connecting Speakers to Yaqin 10L
  163. Gyrator Filter
  164. 6ab4 tube socket mounting
  165. Any Moto heads? Need OT advice please
  166. Did I break my tube? (new blue glow)
  167. I need help with ccs based LTP
  168. 4033L- rare triode tube.
  169. Single tube linestage schematic wanted: 8CG7
  170. Tetra Sans PS
  171. Tone controls
  172. Vintage Heathkit Electronic Switch as soundcard interface
  173. K-12M extra caps??
  174. Looking for Tube Amp Kit Recommendations
  175. magnatone 280 schematic
  176. high voltage after cap. change
  177. My first tube amp
  178. Recommendations for 6888 triode operating point?
  179. Mullard 12AX7 part uniformity
  180. 6n15n-EB confusion
  181. Noob Question: Phono Preamp
  182. Transformer data required P782
  183. Snubbers on Power Transformer Secondaries
  184. CCS for 6V6 PP amp
  185. screen voltage for triode strapped pentode
  186. New Driver
  187. purpose and value importance of resistor
  188. Values for Vintage Amp's & Preamp's Paragon 12(70's) & More
  189. Help with amp please.
  190. Another Discrete Current Source
  191. 834 Triode amp
  192. Determing the reason for mystery? cap in schematic.
  193. Dyna ST70 to Dual-differential EL34 triode amp project
  194. Tube Signal to Noise Ratio / Dynamic Range
  195. fluctating bias
  196. Just tried a Wire Wound pot for volume.
  197. LED's in the cathode..
  198. Dr. Arthur Loesch
  199. Counterpoint SA-220 mods
  200. Broskie P-P Bridged Output Stage
  201. Would a member fluent in technical German please have a look at this link?
  202. Damaged tube? EL84
  203. Heathkit AA-161 EL84/6BQ5 PP mono integrated amp mod
  204. vk-2100 mod question please
  205. Heater supply
  206. 6111/6n16b - linestage noise problem
  207. OPT specs
  208. Re: Tube Line gain stage with pcc88 or ecc82
  209. Knight-kit KA-55
  210. Can I delay part of a B supply this way?
  211. Tube Preamp turn on circuit
  212. SE GM-70 for 700-800 euro?
  213. filter cap markings
  214. tube buffer noise cancellation
  215. PSUD 2
  216. Bypassing filter caps with Smaller caps
  217. balancing resister for series capacitor in a power supply
  218. Yaqin MC-100b- TJ Full Music 6sn7
  219. Forgive me for I have sinned. Help with Volume Pot!
  220. Help with diagnoses for leak 20 PLEASE
  221. Suggested Circuit Changes to use EM80 in place of 6E2 Eye
  222. Fred Nachbaur SET amp: input capacitor
  223. Heathkit scu 1 and knight kn924 needed schematics
  224. Journey to the centre of a tube..
  225. RIP Dr Jim Marshall
  226. some questions about an ECL82 SE amp
  227. Heathkit Sine/Square wave Generator Manual needed!
  228. SRPP Signal Output Capacitors
  229. simple se input impedance
  230. Kt120 screen current
  231. New or used output xformers to play around with?
  232. Magnavox amp
  233. Help hooking up panel ammeter for bias adjust
  234. opt A-440
  235. OTL Headphone amplifier with Tube ED8000
  236. NJ7P Gone?
  237. MYSTERY METAL TUBES B-1532
  238. noisy tubes
  239. Old amp hum repair
  240. Traveling with DIY Kit in USA-Airport Security Question
  241. Hammond 1650P vs 1650N For EL34 PP
  242. Calibrate a Hickok 6000?
  243. Blown Output Tubes
  244. Kriesler Radiogram refurbishment questions
  245. 6P15P socket connection
  246. Revision 2. Balanced
  247. 6V6 schematic
  248. 6h23N test setting?
  249. 12AH7GT
  250. TUBE Tape Head record / playback amp....

Content Relevant URLs by vBSEO 3.3.2