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  1. Should I ground my ST 70?
  2. What is the biggest 300B tube? (Dimension)
  3. 6N16 Valve break-in time
  4. Mystery Amp.
  5. valves tungsten filament
  6. Musical Machine (triode PP EL34) question(s)
  7. M100 Output Tube Problem!
  8. Need to replace the power switch on an EAR 859
  9. Eico pentode vs triode VA
  10. gold grid 5881 - was I had?
  11. DN2540 CCS questions
  12. Operating point for pp KT88
  13. Low THD of Opt Cathode feedback
  14. No bias in S-5 12K, 8L, 16L, etc?
  15. Wanted...broken Golden Tube Audio SE-40
  16. Precise 116 Data Needed
  17. Can you bi-wire using two different taps
  18. Transient Responce of Williamson Amp build
  19. Tantalum caps in the filament supply?
  20. Assistance needed in reconstructing a Golden Tube Audio SE-40
  21. interesting power tube comparison chart
  22. 833A and 3-500Z Circuits
  23. Pilot SA-260 amp and Fischer 400C advice
  24. Long tailed pair phase inverter issues
  25. advice on changing bridge rectifier
  26. 21st Century Maida Regulator
  27. 6CA7 UL Push Pull Amp Design
  28. Tube recommendations anyone?
  29. WE 2C51 Date codes
  30. T500-1 - any ideas?
  31. hybrid power amp and more questions
  32. Yaqin MC-100B - not as powerful as advertised, but still a good value.
  33. 6CB5 AMP BUILD.
  34. ABB France SE OPT??
  35. heater wiring
  36. Audioromy FU29 improvement and upgrades?
  37. Need VFD display filament driver
  38. Power Transformer Limitations
  39. Yaqin 100b channel imbalance
  40. Grid stoppers in class AB2 push-pull arrangenets?
  41. Glass bead inside of KT88
  42. Find tube tester!
  43. mono block amps with 2 x 833C overkill ? even possible to DIY?
  44. happiness is a box of 6550 NOS tubes
  45. Taming the 83
  46. 6550 tube bias characters
  47. Tube Amp Squeel
  48. Bias help Music Angel L$, EL84
  49. Stubborn Oscillation
  50. Moderm "high watt" resistors seem too small
  51. Thyratron based emergency switch?
  52. vT4C.com out of business....
  53. Maggie 8802 6V6
  54. Need Counterpoint SA-3 Board Photo
  55. Diodes in a Graetz Hybrid
  56. Tube Noob with a few questions
  57. KT88 Push Pull Idea... Questions
  58. Superior Instruments tv11 restore question?
  59. Superior Instruments tv11 restore question?
  60. Frequency Response of Output Tubes
  61. symptom of a dying (gain) tube
  62. Grounding in monoblock amps
  63. Seeking 6ME5 data and connection diagram
  64. 12BK5 UL tracing gone boosted triode?
  65. Difference between OPT
  66. Tweaking PP AMP Suggestions Please
  67. DC coupled Sand 'n Glass with Current Feedback
  68. Yaqin 100B fire and spares
  69. Pls help with a preamp
  70. Questions about Aikdo all in one octal
  71. Did I get used to my amp's sound?
  72. Michaelson and Austin TVA1 revB
  73. Joy of birth - a new preamp brought to the world
  74. 5U4G
  75. 6N6P best musicality? Help with modes.
  76. Identifying this capacitor in my Cayin TA-30 amp
  77. GU50 Push-Pull version1
  78. Common mode feedback
  79. Stuck with repair ;(
  80. active hum cancellation. PCB idea?
  81. Why this huge cap is so light?
  82. OPT performance
  83. Capacitor WVDC. is higher really better?
  84. Tung Sol ECC803S reissue - thumbs down
  85. Biasing Marshall 9200
  86. In a search for a 6CG7 line stage schematic
  87. Output stage for a Mono FM tube tuner
  88. Want to use El Cheapo P.I. for Scott LK72 rebuild
  89. Ansar caps
  90. TO220 isolation kits breakdown
  91. Schematic for Sony TC-200 tape unit
  92. HV power supply with serial chokes
  93. no logo on tube
  94. Tango XE-20-600S SE OPT for preamp ?
  95. RF Voltage Amplifier
  96. Anyone deal with psvane member here?
  97. Op Amp
  98. Imbalanced LTP using 6922/E88CC
  99. OPT choice for PP1C
  100. Drawing software for P2P layout?
  101. A hybrid amplifier with PCC88 and IRFP240/9240
  102. ARC D-75A Regulator tube
  103. cap upgrade worth it?
  104. valve/tube output transformer construction
  105. 300B (or other DHT) biasing options
  106. Cathode Bypass Capacitor concern
  107. Phase splitter into push pull front end - possible?
  108. Question on push-pull OT LEads
  109. Importance of Screen Voltage of Pentode???
  110. measuring dc offset in OTL headphone amp
  111. Seeking comments on Russian KBG-MN for PS
  112. Joe List Archive
  113. grundig tk45
  114. Grid bias - sound quality of battery or PSU?
  115. Help: Western Electric 418A tubes wire in triode ?
  116. Scott 355 Tuner-Preamp
  117. 6550 internal resistance hit parade
  118. Max anode voltage and srpp/aikido amps
  119. Effect of IERC coolers on SQ
  120. Tube standoff ?
  121. YAQIN MS-650B vs Yarland PRO 845 mkIV ?
  122. New Harman Kardon Citation II
  123. Conrad johnson Preamp Volume
  124. What's the benefit of dual NFB?
  125. Over-Spec'd PT as replacement.
  126. pp KT88, IT phase splitter
  127. ID this for me?
  128. 12AX7 in starving mode Dynaco PAS3X
  129. YAQIN MS-22B. Any thoughts, please?
  130. Heathkit A7E phono section
  131. Dyna-Quik 500
  132. Driving balanced outputs
  133. Primary current feedback - any good? Help!
  134. 3C30 tube...datasheet...help !!!
  135. LEDs on input valve cathodes
  136. Help with Conrad Johnson
  137. Output Transformer Power Rating Question
  138. Little piece of glass in tube.
  139. ASL Preamp Help
  140. Start to Salivate - My Tube Amp Candidates - Your thoughts welcome
  141. Citation V OPT Diagnosis/Question...
  142. Cossor BT185 Beam tetrode
  143. Using a non-bridge (2 diode) full wave rectifier in bias supply.
  144. Amp making phase shifter noise
  145. Help, Amp distortion after on/off/on???
  146. TDO 5w resistors?
  147. Audio Research Dual 75 - Low Bias
  148. 6N3 SRPP + 6N5P Cathode Follower HPA Testing
  149. 6N16 headphone amplifier
  150. 5k plate to plate, el34 triode strapped, 400v b+
  151. russian penthodes 6J2P-EB and 6J9P.
  152. mA meter drags the circuit down
  153. Valve stage coupling capacitor leakage?
  154. Carvin Transformer
  155. Modifying the Lowther Club HK Jazz 6L6 ($449 SET amp)
  156. RCA 6V6PP amp schematic (Schade fb)
  157. 25W Class A Hybrid Amp
  158. help testing gz32 gz34
  159. A BeamKido?
  160. Zeners and voltage regulation
  161. A2 positive bias push pull possible?
  162. EL34 burn out on Yaqin MC10T
  163. input transformer and impedance question
  164. Options for 300mA tube rectifiers
  165. Electrical flow
  166. 5AR4 @ 250mA
  167. newbie with a choke question
  168. ROCKOAL JUKEBOX 1458
  169. Who can help to recognize this tube preamp?
  170. DIY High power Audio Amplifier from Heathkit SB200
  171. ECL82 amplifier help
  172. 6146B SPICE model wanted
  173. how to install a bias meter in a cathode bias amp
  174. Stuck... Output tube for Single ended?
  175. Aikido Octal Headphone amp
  176. silvertone organ amp conversion. 4704
  177. Impedance bridging
  178. Philips AG-9016 frequency range?
  179. fuse voltage rating?
  180. Grounding issue between turntable and tube amp
  181. Great sounding KT88 amp?
  182. Designing a Gomes i/v stage for tda1541a
  183. choke input power supply
  184. Need Help with New Amp Build, Ugly signals
  185. Amplifier Saftey
  186. Cary SLM100 question (older brand)
  187. 6n18p 6n1p 6n2p project needed
  188. Heater wiring idea?
  189. 300B Amp Testing
  190. New amp build
  191. Bamboo chassis 6P3P SE
  192. 6N23P-EB SRPP DAC output stage.
  193. Packard Plamor Schematic needed
  194. Hickok 600A
  195. Opinion; Alternate input tube socket
  196. Very Simple Attenuator For Audio Card
  197. Switchable PI, Paraphase,Cathodyne, LTP.
  198. Hmm... 4-1000As
  199. Bootstrapped anode
  200. Selecting the correct output transformer/primary impedance
  201. Caddock MK-132 or Mills MRA-12 as plate R?
  202. Minimum rating for stepdown transformer
  203. 6L6 Dared VP-20 issues
  204. Potentiometer Desigations/Codes
  205. 6L6 SE Tube Amp Kit on eBay... opinions?
  206. Building a VT46/PT25H PP amp
  207. Help choosing Sweat Peach FU50 or KT100
  208. New FM-3 Boards
  209. Unity-Coupled amp project
  210. Rectifier injecting noise into heater supply
  211. Tube base failures
  212. 1624 as DHT triode outputs
  213. Will this 2 stage DC DHT cct idea work?
  214. Help with Output Transformer
  215. multi cap verses add on power supply board
  216. 6AS7 hybride CCS
  217. Decware Zbox - looking for Tube buffer mods to reduce buzz
  218. Decware Zbox - looking for Tube buffer mods to reduce buzz
  219. Eico-ST-70 Advice
  220. Choosing Btw 2 EL34 China Tube Amps
  221. Looking for the GA article.
  222. Tube amp left ch. hum
  223. Did i model this PT correctly(psud2)?
  224. Help with the modifications of my tube-amp
  225. detailed photos of RH 84 build?
  226. heathkit aa-191
  227. Which KT-88 tube?
  228. 10m45s cascode diagram?
  229. What amp can make use of these large caps?
  230. Leslie 720 used with stereo keyboard
  231. Tube testers : sorting out settings for the Jackson 648
  232. Question about Shishido 2A3
  233. A micro-programmable tube tracer/tester
  234. amp with the FD422
  235. ST-35 C-1 Capacitor on PC-13 board.
  236. Transformer winding examples!!!!
  237. sansui sm-33
  238. How to mod ASL MG OTL 32 DT?
  239. 300b problem
  240. Audio Research M100s
  241. E83CC in PI or Preamp
  242. Current Dumping Amplifier
  243. Quicksilver 8417 Bias
  244. PtP wiring: Solidcore unshielded cable
  245. Removing a motor from a tube turntable.
  246. Why do I go to hamfests?
  247. Circlotron Amplifier Advice Needed
  248. Traces inside tube?
  249. Hybrid for Zobsky
  250. help identifying telefunken tubes

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