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  1. 2a3 alternative after NOS burning
  2. 6SN7 SRPP - oscillating dc offset
  3. Hickok TV-2 'percent quality'
  4. Another Tube I/V converter/preamp for balanced DACs with SE output:build thread
  5. Aikido LV 48V ECC99 or 6N6p
  6. Project: Ultra Small 6C33 / Hybrid Stereo Headphone Amplifier
  7. Back to the tubes
  8. Any use for these PAECO transformer?
  9. Video lectures on tube amplifier design
  10. Millett PP or Allen Wright's PP-2c or?
  11. Magnavox 8608-10
  12. Time relay
  13. Help with Music Angel XD800MKIII mods!?
  14. Little Dot MKIII ??????
  15. Cathode follower wideband amplifier
  16. Wrong base ???
  17. My first DIY schematic... need eagle eyes.!
  18. Stubborn Noise/Oscillation - Another Call for Help
  19. help with power tranny
  20. Tube Amp Repair - SE Michigan
  21. ST 70 Power on!
  22. given choice of low screen voltage or low bias which sounds better or is it equal
  23. How many various OEM brands come from Shuguang?
  24. Bye for now! :)
  25. general power tube output impedance chart?
  26. Should I ground my ST 70?
  27. What is the biggest 300B tube? (Dimension)
  28. 6N16 Valve break-in time
  29. Mystery Amp.
  30. valves tungsten filament
  31. Musical Machine (triode PP EL34) question(s)
  32. M100 Output Tube Problem!
  33. Need to replace the power switch on an EAR 859
  34. Eico pentode vs triode VA
  35. gold grid 5881 - was I had?
  36. DN2540 CCS questions
  37. Operating point for pp KT88
  38. Low THD of Opt Cathode feedback
  39. No bias in S-5 12K, 8L, 16L, etc?
  40. Wanted...broken Golden Tube Audio SE-40
  41. Precise 116 Data Needed
  42. Can you bi-wire using two different taps
  43. Transient Responce of Williamson Amp build
  44. Tantalum caps in the filament supply?
  45. Assistance needed in reconstructing a Golden Tube Audio SE-40
  46. interesting power tube comparison chart
  47. 833A and 3-500Z Circuits
  48. Pilot SA-260 amp and Fischer 400C advice
  49. Long tailed pair phase inverter issues
  50. advice on changing bridge rectifier
  51. 21st Century Maida Regulator
  52. 6CA7 UL Push Pull Amp Design
  53. Tube recommendations anyone?
  54. WE 2C51 Date codes
  55. T500-1 - any ideas?
  56. hybrid power amp and more questions
  57. Yaqin MC-100B - not as powerful as advertised, but still a good value.
  58. 6CB5 AMP BUILD.
  59. ABB France SE OPT??
  60. heater wiring
  61. Audioromy FU29 improvement and upgrades?
  62. Need VFD display filament driver
  63. Power Transformer Limitations
  64. Yaqin 100b channel imbalance
  65. Grid stoppers in class AB2 push-pull arrangenets?
  66. Glass bead inside of KT88
  67. Find tube tester!
  68. mono block amps with 2 x 833C overkill ? even possible to DIY?
  69. happiness is a box of 6550 NOS tubes
  70. Taming the 83
  71. 6550 tube bias characters
  72. Tube Amp Squeel
  73. Bias help Music Angel L$, EL84
  74. Stubborn Oscillation
  75. Moderm "high watt" resistors seem too small
  76. Thyratron based emergency switch?
  77. vT4C.com out of business....
  78. Maggie 8802 6V6
  79. Need Counterpoint SA-3 Board Photo
  80. Diodes in a Graetz Hybrid
  81. Tube Noob with a few questions
  82. KT88 Push Pull Idea... Questions
  83. Superior Instruments tv11 restore question?
  84. Superior Instruments tv11 restore question?
  85. Frequency Response of Output Tubes
  86. symptom of a dying (gain) tube
  87. Grounding in monoblock amps
  88. Seeking 6ME5 data and connection diagram
  89. 12BK5 UL tracing gone boosted triode?
  90. Difference between OPT
  91. Tweaking PP AMP Suggestions Please
  92. DC coupled Sand 'n Glass with Current Feedback
  93. Yaqin 100B fire and spares
  94. Pls help with a preamp
  95. Questions about Aikdo all in one octal
  96. Did I get used to my amp's sound?
  97. Michaelson and Austin TVA1 revB
  98. Joy of birth - a new preamp brought to the world
  99. 5U4G
  100. 6N6P best musicality? Help with modes.
  101. Identifying this capacitor in my Cayin TA-30 amp
  102. GU50 Push-Pull version1
  103. Common mode feedback
  104. Stuck with repair ;(
  105. active hum cancellation. PCB idea?
  106. Why this huge cap is so light?
  107. OPT performance
  108. Capacitor WVDC. is higher really better?
  109. Tung Sol ECC803S reissue - thumbs down
  110. Biasing Marshall 9200
  111. In a search for a 6CG7 line stage schematic
  112. Output stage for a Mono FM tube tuner
  113. Want to use El Cheapo P.I. for Scott LK72 rebuild
  114. Ansar caps
  115. TO220 isolation kits breakdown
  116. Schematic for Sony TC-200 tape unit
  117. HV power supply with serial chokes
  118. no logo on tube
  119. Tango XE-20-600S SE OPT for preamp ?
  120. RF Voltage Amplifier
  121. Anyone deal with psvane member here?
  122. Op Amp
  123. Imbalanced LTP using 6922/E88CC
  124. OPT choice for PP1C
  125. Drawing software for P2P layout?
  126. A hybrid amplifier with PCC88 and IRFP240/9240
  127. ARC D-75A Regulator tube
  128. cap upgrade worth it?
  129. valve/tube output transformer construction
  130. 300B (or other DHT) biasing options
  131. Cathode Bypass Capacitor concern
  132. Phase splitter into push pull front end - possible?
  133. Question on push-pull OT LEads
  134. Importance of Screen Voltage of Pentode???
  135. measuring dc offset in OTL headphone amp
  136. Seeking comments on Russian KBG-MN for PS
  137. Joe List Archive
  138. grundig tk45
  139. Grid bias - sound quality of battery or PSU?
  140. Help: Western Electric 418A tubes wire in triode ?
  141. Scott 355 Tuner-Preamp
  142. 6550 internal resistance hit parade
  143. Max anode voltage and srpp/aikido amps
  144. Effect of IERC coolers on SQ
  145. Tube standoff ?
  146. YAQIN MS-650B vs Yarland PRO 845 mkIV ?
  147. New Harman Kardon Citation II
  148. Conrad johnson Preamp Volume
  149. What's the benefit of dual NFB?
  150. Over-Spec'd PT as replacement.
  151. pp KT88, IT phase splitter
  152. ID this for me?
  153. 12AX7 in starving mode Dynaco PAS3X
  154. YAQIN MS-22B. Any thoughts, please?
  155. Heathkit A7E phono section
  156. Dyna-Quik 500
  157. Driving balanced outputs
  158. Primary current feedback - any good? Help!
  159. 3C30 tube...datasheet...help !!!
  160. LEDs on input valve cathodes
  161. Help with Conrad Johnson
  162. Output Transformer Power Rating Question
  163. Little piece of glass in tube.
  164. ASL Preamp Help
  165. Start to Salivate - My Tube Amp Candidates - Your thoughts welcome
  166. Citation V OPT Diagnosis/Question...
  167. Cossor BT185 Beam tetrode
  168. Using a non-bridge (2 diode) full wave rectifier in bias supply.
  169. Amp making phase shifter noise
  170. Help, Amp distortion after on/off/on???
  171. TDO 5w resistors?
  172. Audio Research Dual 75 - Low Bias
  173. 6N3 SRPP + 6N5P Cathode Follower HPA Testing
  174. 6N16 headphone amplifier
  175. 5k plate to plate, el34 triode strapped, 400v b+
  176. russian penthodes 6J2P-EB and 6J9P.
  177. mA meter drags the circuit down
  178. Valve stage coupling capacitor leakage?
  179. Carvin Transformer
  180. Modifying the Lowther Club HK Jazz 6L6 ($449 SET amp)
  181. RCA 6V6PP amp schematic (Schade fb)
  182. 25W Class A Hybrid Amp
  183. help testing gz32 gz34
  184. A BeamKido?
  185. Zeners and voltage regulation
  186. A2 positive bias push pull possible?
  187. EL34 burn out on Yaqin MC10T
  188. input transformer and impedance question
  189. Options for 300mA tube rectifiers
  190. Electrical flow
  191. 5AR4 @ 250mA
  192. newbie with a choke question
  193. ROCKOAL JUKEBOX 1458
  194. Who can help to recognize this tube preamp?
  195. DIY High power Audio Amplifier from Heathkit SB200
  196. ECL82 amplifier help
  197. 6146B SPICE model wanted
  198. how to install a bias meter in a cathode bias amp
  199. Stuck... Output tube for Single ended?
  200. Aikido Octal Headphone amp
  201. silvertone organ amp conversion. 4704
  202. Impedance bridging
  203. Philips AG-9016 frequency range?
  204. fuse voltage rating?
  205. Grounding issue between turntable and tube amp
  206. Great sounding KT88 amp?
  207. Designing a Gomes i/v stage for tda1541a
  208. choke input power supply
  209. Need Help with New Amp Build, Ugly signals
  210. Amplifier Saftey
  211. Cary SLM100 question (older brand)
  212. 6n18p 6n1p 6n2p project needed
  213. Heater wiring idea?
  214. 300B Amp Testing
  215. New amp build
  216. Bamboo chassis 6P3P SE
  217. 6N23P-EB SRPP DAC output stage.
  218. Packard Plamor Schematic needed
  219. Hickok 600A
  220. Opinion; Alternate input tube socket
  221. Very Simple Attenuator For Audio Card
  222. Switchable PI, Paraphase,Cathodyne, LTP.
  223. Hmm... 4-1000As
  224. Bootstrapped anode
  225. Selecting the correct output transformer/primary impedance
  226. Caddock MK-132 or Mills MRA-12 as plate R?
  227. Minimum rating for stepdown transformer
  228. 6L6 Dared VP-20 issues
  229. Potentiometer Desigations/Codes
  230. 6L6 SE Tube Amp Kit on eBay... opinions?
  231. Building a VT46/PT25H PP amp
  232. Help choosing Sweat Peach FU50 or KT100
  233. New FM-3 Boards
  234. Unity-Coupled amp project
  235. Rectifier injecting noise into heater supply
  236. Tube base failures
  237. 1624 as DHT triode outputs
  238. Will this 2 stage DC DHT cct idea work?
  239. Help with Output Transformer
  240. multi cap verses add on power supply board
  241. 6AS7 hybride CCS
  242. Decware Zbox - looking for Tube buffer mods to reduce buzz
  243. Decware Zbox - looking for Tube buffer mods to reduce buzz
  244. Eico-ST-70 Advice
  245. Choosing Btw 2 EL34 China Tube Amps
  246. Looking for the GA article.
  247. Tube amp left ch. hum
  248. Did i model this PT correctly(psud2)?
  249. Help with the modifications of my tube-amp
  250. detailed photos of RH 84 build?

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