Log in

View Full Version : Vacuum Tubes

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 | 
  1. SE output transformer with no air gap and low flux?? (19 replies)
  2. FA: UTC HA-107 AUDIO INTERSTAGE TRANSFORMER (Fully-Tested) (0 replies)
  3. Well, Mr. Marshall, are you happy now? (0 replies)
  4. EICO HF12 amplifier component (7 replies)
  5. Are any Repub Candid Ates into tubes? (26 replies)
  6. Valves rule! (So do tubes!) (0 replies)
  7. Voltage Swing of D3a?? (6 replies)
  8. Triplett 3413-B (1 replies)
  9. 6DW5 vs. 6BQ5/EL84 (6 replies)
  10. Sources (8 replies)
  11. 829B like audio amplifier? (9 replies)
  12. KT120, more test results. (0 replies)
  13. God The Father 9-4-72 (9 replies)
  14. New driver board for toob amp (0 replies)
  15. The unity coupled McIntosh circuit (0 replies)
  16. 300B for driver?? (2 replies)
  17. Audio Classics Is Not A Good Sport (14 replies)
  18. KT120 tests, compared to 6550. (5 replies)
  19. The best AM receiver (0 replies)
  20. "Dollar Days" FM Transmitter (0 replies)
  21. High power guitar amps are a dead issue (22 replies)
  22. Ping: CHOKY? Are you here? (2 replies)
  23. EL156 SE (10 replies)
  24. Using thyratrons for an amplifier (20 replies)
  25. Anyone familiar With Jensen A640 T220 Crossovers? (0 replies)
  26. parafeed or series SE output (3 replies)
  27. GEC 400W UL, what a high power design?? (13 replies)
  28. Which KT88 PP should I go for? (12 replies)
  29. 7377 tube also known as QQE04-5-what was it for? (7 replies)
  30. Williamson Resources: (2 replies)
  31. Remembering Fred Nachbaur (1 replies)
  32. KT120 (17 replies)
  33. FM Transmitter (4 replies)
  34. My take on the Brook 10C Auto Bias (10 replies)
  35. Next Project (14 replies)
  36. Western Electric 300B Matched Pair (12 replies)
  37. Re: Audio Precision System One Dual Domain Measurement Systems (1 replies)
  38. New email Address (1 replies)
  39. Re: Once upon a midnight clear... (1 replies)
  40. What are the differences between DRD and Loftin White? (3 replies)
  41. McIntosh MAC-1500 (9 replies)
  42. What's in a name? Changed! (3 replies)
  43. Fun with Gort (2 replies)
  44. Re: On the late William Z. Johnson (8 replies)
  45. Circlotron (4 replies)
  46. The Ether (5 replies)
  47. E130L or 7534 tube (4 replies)
  48. Anyone know tube like that? (8 replies)
  49. Question about Circlotron output section (2 replies)
  50. scans available of GEC application notes (10 replies)
  51. Bringing up my hifi after 3 year storage (4 replies)
  52. Bartolomeo Aloia BA211 (24 replies)
  53. Re: Sure, pal! (7 replies)
  54. Jones's servo bias (16 replies)
  55. Restored Antique Radios FS (4 replies)
  56. Micamold capacitor (6 replies)
  57. Brook 10c servo bias (49 replies)
  58. Hammond 1682 OPT for 4 x 807's? (11 replies)
  59. Brook 10C. (3 replies)
  60. The finest interconnect money can buy - and it's not that expensive! (3 replies)
  61. Building a new shortwave tube radio (126 replies)
  62. ³Twin Triode² transmitter background information (3 replies)
  63. IBM Radio? (0 replies)
  64. Sun to set on valve era, 'Twin Triode' AM Transmiter Nexus (8 replies)
  65. Re: Is this really true-Ebay Claims (0 replies)
  66. Need catalog Lord Valve (12 replies)
  67. Sun to set on valve era (1 replies)
  68. KT90EH review and relability. (8 replies)
  69. looking for realistic 33-1085 mike manual (0 replies)
  70. Brook 10C's (66 replies)
  71. HP 201C Audio Osc coupling cap .5 900vdc (28 replies)
  72. Eico 902 Distortin Analyzer Manual Needed (1 replies)
  73. Monobloc pre-set gain pot value (12 replies)
  74. woodside radford (1 replies)
  75. Single ECH35 Synchronous AM Detector (3 replies)
  76. Isolating bench test equipment (9 replies)
  77. Can someone help to identify this prewar capacitor? (16 replies)
  78. Checkin in. So how's my problem child doing these days? (21 replies)
  79. Restored Antique Radios FS (4 replies)
  80. 3rd try kt88 amp (3 replies)
  81. H.H.Scott of audio fame (0 replies)
  82. H.H.Scott of audio fame (10 replies)
  83. 2nd try kt88 amp (4 replies)
  84. 1st try kt88 amp (37 replies)
  85. Re: Good as gold tube! (20 replies)
  86. Re: 'Twin Triode' AM Transmiter (10 replies)
  87. 'Twin Triode' AM Transmitter (1 replies)
  88. OT Is magnetic extra magnetic shielding required inside computer? (5 replies)
  89. FA: Gryphon Guideline MK2 * Pure LC Silver Cable By Siltech (0 replies)
  90. anyone know this old portable mic audio amp [RCA TA-125] (4 replies)
  91. Replacement of IRF730 for Sonic Frontiers SFL-1 (1 replies)
  92. Anode dissipation formula for AB amps (2 replies)
  93. Re: VT 105 ( ML6 ) ( AMPLIFIER ) (2 replies)
  94. Re: The AM varicap (3 replies)
  95. Europe as investors fretted about a key (0 replies)
  96. Re: Oddball Raytheon Subminiature QF-721 tubes (4 replies)
  97. Is Choky still here? (2 replies)
  98. Is Choky still around in this forum? (no text) (0 replies)
  99. I will KILL AMERICAN CHRISTIAN TERRORISTS George Bush Jr, Dick Cheney et al (0 replies)
  100. Is Choky still around in this forum? (0 replies)
  101. AM synchrodyne radio with PLLexplained. (4 replies)
  102. DC Link film caps in power supplies (7 replies)
  103. FS: RCA 580-D 400ma tube regulated HV supply (1 replies)
  104. Phase Locked Loop with vacuum tubes. (47 replies)
  105. AM detector, part 3 (2 replies)
  106. Hewlett Packard Journal Link (0 replies)
  107. Compansated AM Detector, for the Faithful (16 replies)
  108. AM detector part 3, 4, 5, 6, 7, 8, etc. (0 replies)
  109. AM detector, part 2 (3 replies)
  110. AM detector, part 1 (22 replies)
  111. British vs. US amplifiers, articles? (11 replies)
  112. the greater important is actually (1 replies)
  113. Overvoltage protection (17 replies)
  114. relays for B+ (12 replies)
  115. Fracking is hated in Oz. (18 replies)
  116. Someone raves about 50 grand.... (13 replies)
  117. Fixing a hum loop in a WA-P2 pre-amp hook-up to a power amplifier (0 replies)
  118. Lets Improve John Byrns 25L6 Amplifier (3 replies)
  119. Patrick T's recent post on NFB in AA5s (0 replies)
  120. Fisher X-101 repair and restoration? (0 replies)
  121. VLF stability in Williamson-type amplifiers (92 replies)
  122. QUAD-II OPT core&winding details. (1 replies)
  123. QUAD Modes (0 replies)
  124. QUAD [1] Original booklet reproduced at Jute on Amps (58 replies)
  125. John Byrns Phono Oscillator Hum Problems (0 replies)
  126. The QUAD system (1 replies)
  127. Re: Newbie Question about Replacing Tubes (1 replies)
  128. Re: The QUAD I amplifier (2 replies)
  129. The QUAD I amplifier (45 replies)
  130. A Hill of Beans (12 replies)
  131. Market for Used Tubes? (1 replies)
  132. Acoustical/QUAD's Bean Counters? (64 replies)
  133. Inrush Surge pics (7 replies)
  134. Re: Choosing a fuse (0 replies)
  135. Best tap for NFB? (20 replies)
  136. Choosing a fuse (58 replies)
  137. Re: NFB windings, was there a US style and UK style? (2 replies)
  138. Re: NFB windings, was there a US style and UK style? (0 replies)
  139. Re: NFB windings, was there a US style and UK style? (3 replies)
  140. Re: NFB windings, was there a US style and UK style? (73 replies)
  141. NFB windings, was there a US style and UK style? (2 replies)
  142. Re: Why are vacuum tubes still used in audio amplifiers instead ofsolid-state transistor (1 replies)
  143. Re: sylvainia 6ca7 WTB: two pairs (2 replies)
  144. Which amp to restore next? (0 replies)
  145. Guitar Amps without Isolation Transformer (10 replies)
  146. sylvainia 6ca7 WTB: two pairs (1 replies)
  147. Re: Why are vacuum tubes still used in audio amplifiers instead ofsolid-state transistor (1 replies)
  148. Some Applications of Skin Effect at Power Frequencies (0 replies)
  149. Why are vacuum tubes still used in audio amplifiers instead of solid-state transistor (36 replies)
  150. Re: Some Notes on Heater Surge Current‏ (3 replies)
  151. Gamma Rhythm amp valves (1 replies)
  152. Re: Bad wire (4 replies)
  153. Do People Ever Collect Tubes? (11 replies)
  154. Capacitor soakage and PIO caps (0 replies)
  155. Re: Bad wire (16 replies)
  156. Let me introduce myself (tube related). (25 replies)
  157. Re: Valve Rolling Myth? (0 replies)
  158. Bad wire (8 replies)
  159. Re: Valve Rolling Myth? (2 replies)
  160. Re: Some Notes on Heater Surge Current [Long - really HIGH power tubes] (0 replies)
  161. Valve Rolling Myth? (25 replies)
  162. Re: Some Notes on Heater Surge Current [Long - really HIGH power tubes] (6 replies)
  163. Tube replacements for Icon Audio MB 845 (6 replies)
  164. Re: Cheap B+ boost (2 replies)
  165. More On The B+ Mod (11 replies)
  166. Cheap B+ boost (34 replies)
  167. Re: Distortion products (1 replies)
  168. Re: Distortion products (1 replies)
  169. Re: Distortion products (1 replies)
  170. Distortion products (105 replies)
  171. fixed bias circuits and pot wipers (14 replies)
  172. WTB: Looking for 6DA6/EF89 tubes -- Need 4 (15 replies)
  173. The Inverted Triode...for the curious & others (53 replies)
  174. Some Notes on Heater Surge Current‏ (0 replies)
  175. Bootstrapped Driver- More (1 replies)
  176. parallel chokes in a power supply (9 replies)
  177. 6LU8 SET or SEUL Amp (17 replies)
  178. Determination of Maximum Positive Feedback in Bootstrapped Driver (0 replies)
  179. Bootstrapped driver? PFB? stabilty? (5 replies)
  180. Bootstrapped Driver (1 replies)
  181. I have never made a transfomer (4 replies)
  182. Small Fully Integrated Amplifier (6 replies)
  183. How The Ancients Measured Small Electrical Resistances (6 replies)
  184. Low Cost Constant Current Solution for Low Resistance Measurements (12 replies)
  185. Replace projector globe with resistor? (17 replies)
  186. Looking for speakers for a vintage Pilot stereo (3 replies)
  187. HT Delay Switch (2 replies)
  188. Re: FA: 92 lbs integr. Tube Amp with Phono MM/MC * LUA Sinfinia (2 replies)
  189. Those WERE Hammond days! (24 replies)
  190. 6j7 driving WE91 type amplfier (1 replies)
  191. Hammond OPT - information wanted (21 replies)
  192. Audio Research VM220 and VT200 amps have serious design shortcomings...... (42 replies)
  193. jobangebote , personalvermittlung , Asphaltbauer Asphaltbauerin , arbeiten im ausland irland , außendienstmitarbeiter , arbeiten im ausland berlin , Winzer Winzerin , it job ausland , jobboerse im ausland , Brieftraeger Brieftraegerin , + + + +++ (0 replies)
  194. Tube amp "singing" when no output hooked up. (18 replies)
  195. Yamaha YTS-875EX Custom Tenor Saxophone.....$900usd (0 replies)
  196. Toroids, Plitron and Bryston... a Canadian nexus (1 replies)
  197. New Year's Resolution -- Working on my draft (0 replies)
  198. Pioneer SM-B200A (10 replies)
  199. The Joys of the New Year (5 replies)
  200. Fred Nachbaur's website (3 replies)
  201. MBT fitness shoes can pamper your feet (0 replies)
  202. Hitachi (Marantz) 50TB1 CRT testing/specs (0 replies)
  203. Hitachi (Marantz) 50TB1 CRT testing/specs (1 replies)
  204. Lord Valve (6 replies)
  205. L/C tester recommendations (15 replies)
  206. Brown base RCA 5692's? (2 replies)
  207. Brown base RCA 5692's? (1 replies)
  208. Disappointment with Audio by Van Alstine (2 replies)
  209. HP333A examination and impressions (14 replies)
  210. HP 333A schematic wanted. (6 replies)
  211. Free Online Calculators for Engineers - Electrical, Mechanical, Electronics (0 replies)
  212. Diode detector R and C value calculations. (0 replies)
  213. Help identify connector (24 replies)
  214. Re: Distortion reduction in diode+C+R detectors (5 replies)
  215. Re: 7591A tubes (2 replies)
  216. HP 606A mystery attenuator fine adjustment figured out. (6 replies)
  217. I-177 Tester Data (0 replies)
  218. Self Split Output Stage (39 replies)
  219. AM generator with 3 transistors and tuned RF transformer. (12 replies)
  220. Re: 8051 Microcontroller (0 replies)
  221. Using two taps of OT secondary (4 replies)
  222. Gilbert Cell AM modulator and demodulator. (29 replies)
  223. SE OPT rewound secondary -- part II of the story (3 replies)
  224. New audio transformer manufacturer (12 replies)
  225. SE Output Transformer winding questions (18 replies)
  226. Kenyon transformer S-510426 (5 replies)
  227. Need to buy good coupling,by-pass caps, & resistors (7 replies)
  228. Vellman tube kits (12 replies)
  229. Craftsmen C550 Sell Mine Buy Yours (0 replies)
  230. Hammond A series PP OT (1 replies)
  231. SE topology (11 replies)
  232. Test circuit for 35W plate dissipation on KT88 (2 replies)
  233. Test circuit for 35W plate dissipation on KT88 (25 replies)
  234. SE Headphones Amp (49 replies)
  235. AVO CT160 valve tester and Carlsbro amp up for grabs coz I'm skint (4 replies)
  236. RDH4 Alternative (3 replies)
  237. DET5 - anybody know this tube? (1 replies)
  238. Worn Tubes? (0 replies)
  239. Saint Therese of Lisieux 5-22-85 (0 replies)
  240. Pilot Tube Amplifier & Preamplifier (0 replies)
  241. "No Alien few fox guys be tie am dog" (7 replies)
  242. Re: 12AX7 grid current (0 replies)
  243. Created by dwarves in the Caves of Audiophile? (2 replies)
  244. gene or its association with genetic (1 replies)
  245. 12AX7 grid current (62 replies)
  246. Restored Antique Radios FS Can deliver to Kutztown PA radio meet. (0 replies)
  247. Protecting speakers against switch-on pops and DC (7 replies)
  248. Making a mono-from-stereo cable (50 replies)
  249. Re: FA: Sherwood s 8000 Tube Receiver - Awesome Condition (2 replies)
  250. Testing KT88 for customer satisfaction (32 replies)