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  1. My first tube amp
  2. Recommendations for 6888 triode operating point?
  3. Mullard 12AX7 part uniformity
  4. 6n15n-EB confusion
  5. Noob Question: Phono Preamp
  6. Transformer data required P782
  7. Snubbers on Power Transformer Secondaries
  8. CCS for 6V6 PP amp
  9. screen voltage for triode strapped pentode
  10. New Driver
  11. purpose and value importance of resistor
  12. Values for Vintage Amp's & Preamp's Paragon 12(70's) & More
  13. Help with amp please.
  14. Another Discrete Current Source
  15. 834 Triode amp
  16. Determing the reason for mystery? cap in schematic.
  17. Dyna ST70 to Dual-differential EL34 triode amp project
  18. Tube Signal to Noise Ratio / Dynamic Range
  19. fluctating bias
  20. Just tried a Wire Wound pot for volume.
  21. LED's in the cathode..
  22. Dr. Arthur Loesch
  23. Counterpoint SA-220 mods
  24. Broskie P-P Bridged Output Stage
  25. Would a member fluent in technical German please have a look at this link?
  26. Damaged tube? EL84
  27. Heathkit AA-161 EL84/6BQ5 PP mono integrated amp mod
  28. vk-2100 mod question please
  29. Heater supply
  30. 6111/6n16b - linestage noise problem
  31. OPT specs
  32. Re: Tube Line gain stage with pcc88 or ecc82
  33. Knight-kit KA-55
  34. Can I delay part of a B supply this way?
  35. Tube Preamp turn on circuit
  36. SE GM-70 for 700-800 euro?
  37. filter cap markings
  38. tube buffer noise cancellation
  39. PSUD 2
  40. balancing resister for series capacitor in a power supply
  41. Yaqin MC-100b- TJ Full Music 6sn7
  42. Forgive me for I have sinned. Help with Volume Pot!
  43. Help with diagnoses for leak 20 PLEASE
  44. Suggested Circuit Changes to use EM80 in place of 6E2 Eye
  45. Fred Nachbaur SET amp: input capacitor
  46. Heathkit scu 1 and knight kn924 needed schematics
  47. Journey to the centre of a tube..
  48. some questions about an ECL82 SE amp
  49. Heathkit Sine/Square wave Generator Manual needed!
  50. SRPP Signal Output Capacitors
  51. Kt120 screen current
  52. New or used output xformers to play around with?
  53. Magnavox amp
  54. Help hooking up panel ammeter for bias adjust
  55. opt A-440
  56. OTL Headphone amplifier with Tube ED8000
  57. NJ7P Gone?
  58. MYSTERY METAL TUBES B-1532
  59. noisy tubes
  60. Old amp hum repair
  61. Traveling with DIY Kit in USA-Airport Security Question
  62. Hammond 1650P vs 1650N For EL34 PP
  63. Blown Output Tubes
  64. Kriesler Radiogram refurbishment questions
  65. 6P15P socket connection
  66. Revision 2. Balanced
  67. 6V6 schematic
  68. 6h23N test setting?
  69. 12AH7GT
  70. TUBE Tape Head record / playback amp....
  71. Strange couple comportament 6L6GC RCA black plates.
  72. Reduce Output Volume
  73. Differential Amp CCS Tail SVCS Plate - Noise Issues
  74. Triode curves for EL/PL519
  75. Is that a SRPP circuit with 6SN7?
  76. KT33 Push Pull
  77. Rogers Cadet III Integrated Amp Capacitor Values help
  78. 2a3 alternative after NOS burning
  79. 6SN7 SRPP - oscillating dc offset
  80. Another Tube I/V converter/preamp for balanced DACs with SE output:build thread
  81. Aikido LV 48V ECC99 or 6N6p
  82. Project: Ultra Small 6C33 / Hybrid Stereo Headphone Amplifier
  83. Back to the tubes
  84. Any use for these PAECO transformer?
  85. Video lectures on tube amplifier design
  86. Millett PP or Allen Wright's PP-2c or?
  87. Magnavox 8608-10
  88. Time relay
  89. Help with Music Angel XD800MKIII mods!?
  90. Little Dot MKIII ??????
  91. Cathode follower wideband amplifier
  92. Wrong base ???
  93. My first DIY schematic... need eagle eyes.!
  94. Stubborn Noise/Oscillation - Another Call for Help
  95. help with power tranny
  96. Tube Amp Repair - SE Michigan
  97. ST 70 Power on!
  98. given choice of low screen voltage or low bias which sounds better or is it equal
  99. How many various OEM brands come from Shuguang?
  100. Bye for now! :)
  101. general power tube output impedance chart?
  102. Should I ground my ST 70?
  103. What is the biggest 300B tube? (Dimension)
  104. 6N16 Valve break-in time
  105. Mystery Amp.
  106. valves tungsten filament
  107. Musical Machine (triode PP EL34) question(s)
  108. M100 Output Tube Problem!
  109. Need to replace the power switch on an EAR 859
  110. Eico pentode vs triode VA
  111. gold grid 5881 - was I had?
  112. DN2540 CCS questions
  113. Operating point for pp KT88
  114. Low THD of Opt Cathode feedback
  115. No bias in S-5 12K, 8L, 16L, etc?
  116. Wanted...broken Golden Tube Audio SE-40
  117. Precise 116 Data Needed
  118. Can you bi-wire using two different taps
  119. Transient Responce of Williamson Amp build
  120. Assistance needed in reconstructing a Golden Tube Audio SE-40
  121. interesting power tube comparison chart
  122. 833A and 3-500Z Circuits
  123. Pilot SA-260 amp and Fischer 400C advice
  124. Long tailed pair phase inverter issues
  125. advice on changing bridge rectifier
  126. 21st Century Maida Regulator
  127. 6CA7 UL Push Pull Amp Design
  128. Tube recommendations anyone?
  129. WE 2C51 Date codes
  130. T500-1 - any ideas?
  131. hybrid power amp and more questions
  132. Yaqin MC-100B - not as powerful as advertised, but still a good value.
  133. 6CB5 AMP BUILD.
  134. ABB France SE OPT??
  135. heater wiring
  136. Audioromy FU29 improvement and upgrades?
  137. Need VFD display filament driver
  138. Power Transformer Limitations
  139. Yaqin 100b channel imbalance
  140. Grid stoppers in class AB2 push-pull arrangenets?
  141. Glass bead inside of KT88
  142. mono block amps with 2 x 833C overkill ? even possible to DIY?
  143. happiness is a box of 6550 NOS tubes
  144. Taming the 83
  145. 6550 tube bias characters
  146. Tube Amp Squeel
  147. Bias help Music Angel L$, EL84
  148. Stubborn Oscillation
  149. Moderm "high watt" resistors seem too small
  150. Thyratron based emergency switch?
  151. vT4C.com out of business....
  152. Maggie 8802 6V6
  153. Need Counterpoint SA-3 Board Photo
  154. Diodes in a Graetz Hybrid
  155. Tube Noob with a few questions
  156. KT88 Push Pull Idea... Questions
  157. Superior Instruments tv11 restore question?
  158. Superior Instruments tv11 restore question?
  159. Frequency Response of Output Tubes
  160. symptom of a dying (gain) tube
  161. Grounding in monoblock amps
  162. Seeking 6ME5 data and connection diagram
  163. 12BK5 UL tracing gone boosted triode?
  164. Difference between OPT
  165. Tweaking PP AMP Suggestions Please
  166. DC coupled Sand 'n Glass with Current Feedback
  167. Yaqin 100B fire and spares
  168. Pls help with a preamp
  169. Questions about Aikdo all in one octal
  170. Did I get used to my amp's sound?
  171. Michaelson and Austin TVA1 revB
  172. Joy of birth - a new preamp brought to the world
  173. 5U4G
  174. 6N6P best musicality? Help with modes.
  175. Identifying this capacitor in my Cayin TA-30 amp
  176. GU50 Push-Pull version1
  177. Common mode feedback
  178. Stuck with repair ;(
  179. active hum cancellation. PCB idea?
  180. Why this huge cap is so light?
  181. OPT performance
  182. Tung Sol ECC803S reissue - thumbs down
  183. In a search for a 6CG7 line stage schematic
  184. Output stage for a Mono FM tube tuner
  185. Want to use El Cheapo P.I. for Scott LK72 rebuild
  186. TO220 isolation kits breakdown
  187. Schematic for Sony TC-200 tape unit
  188. HV power supply with serial chokes
  189. no logo on tube
  190. Tango XE-20-600S SE OPT for preamp ?
  191. RF Voltage Amplifier
  192. Anyone deal with psvane member here?
  193. Op Amp
  194. Imbalanced LTP using 6922/E88CC
  195. OPT choice for PP1C
  196. Drawing software for P2P layout?
  197. A hybrid amplifier with PCC88 and IRFP240/9240
  198. ARC D-75A Regulator tube
  199. cap upgrade worth it?
  200. valve/tube output transformer construction
  201. 300B (or other DHT) biasing options
  202. Cathode Bypass Capacitor concern
  203. Phase splitter into push pull front end - possible?
  204. Question on push-pull OT LEads
  205. Importance of Screen Voltage of Pentode???
  206. measuring dc offset in OTL headphone amp
  207. Seeking comments on Russian KBG-MN for PS
  208. Joe List Archive
  209. grundig tk45
  210. Grid bias - sound quality of battery or PSU?
  211. Help: Western Electric 418A tubes wire in triode ?
  212. Scott 355 Tuner-Preamp
  213. 6550 internal resistance hit parade
  214. Max anode voltage and srpp/aikido amps
  215. Effect of IERC coolers on SQ
  216. Tube standoff ?
  217. YAQIN MS-650B vs Yarland PRO 845 mkIV ?
  218. New Harman Kardon Citation II
  219. Conrad johnson Preamp Volume
  220. What's the benefit of dual NFB?
  221. Over-Spec'd PT as replacement.
  222. pp KT88, IT phase splitter
  223. ID this for me?
  224. 12AX7 in starving mode Dynaco PAS3X
  225. YAQIN MS-22B. Any thoughts, please?
  226. Heathkit A7E phono section
  227. Dyna-Quik 500
  228. Driving balanced outputs
  229. Primary current feedback - any good? Help!
  230. 3C30 tube...datasheet...help !!!
  231. LEDs on input valve cathodes
  232. Help with Conrad Johnson
  233. Output Transformer Power Rating Question
  234. Little piece of glass in tube.
  235. ASL Preamp Help
  236. Start to Salivate - My Tube Amp Candidates - Your thoughts welcome
  237. Citation V OPT Diagnosis/Question...
  238. Cossor BT185 Beam tetrode
  239. Using a non-bridge (2 diode) full wave rectifier in bias supply.
  240. Amp making phase shifter noise
  241. Help, Amp distortion after on/off/on???
  242. TDO 5w resistors?
  243. Audio Research Dual 75 - Low Bias
  244. 6N3 SRPP + 6N5P Cathode Follower HPA Testing
  245. 6N16 headphone amplifier
  246. 5k plate to plate, el34 triode strapped, 400v b+
  247. russian penthodes 6J2P-EB and 6J9P.
  248. mA meter drags the circuit down
  249. Valve stage coupling capacitor leakage?
  250. Carvin Transformer

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