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  1. Is this capacitor required?
  2. Why nowadays tube amplifier should play better than 1960's amplifiers?
  3. Aikido 12vac
  4. iPod to Adcom tube buffer
  5. Referencing a direct coupled output stage
  6. Long lead length to tube socket
  7. 6FH8 a strange tube for audio?
  8. Troubleshooting a µ-follower
  9. unison research unico thump on power on?
  10. CCS Not Working
  11. Allied 333 Hum
  12. EL34 Grid 3 connection
  13. The differential amplifier
  14. low power otl amplifier
  15. Using two stage opamp as first gain stage of power amp.
  16. Standing opts and lying pts?
  17. Tube substitition wanted
  18. Fatman Wi-Tube Hybrid Valve Amplifier with FatDock - No Output
  19. Operating point for 6SN7
  20. Which is the ultimate, perfect negative feedback amount you recommend in UL SE?
  21. Where to buy McIntosh Tube Amplifier Parts?
  22. comments/corrections on 6bg6 pp triode amp
  23. Question about LTP in Morgan Jones' book
  24. Matching 16 ohm loudspeaker into 8 ohm output transformer: can i do any modification?
  25. EL34 SE ultralinear configuration working as a triode: pro and cons
  26. First Build Help Needed - Transformer
  27. dynaco st70 headphone amp
  28. Velleman 4040 rebuild
  29. help needed for heater wiring of a 300B
  30. Best UX4 sockets?
  31. Filson 216 phono rework, advice please
  32. IRFS820B
  33. Help converting integrated amp to preamp
  34. 6N16B triodes: asking advice
  35. D3a IV
  36. stability of bias of KT88 in Xindak V30
  37. half 6SN7 / 6CG7 7pin mini substitute?
  38. Simple Line Stage
  39. 6L6GC redplating - what say you please?
  40. Yaqin MC-10L no bass response
  41. My first phono pre
  42. Fet rectifier?
  43. PSpice simulation
  44. Two-cases amplifier, question about power switch
  45. VTL bias problems compact 100
  46. Assembly Manual heathkit a7-b
  47. Question about CCS used in Morgan Jones' book.
  48. Layout question -- Do PS chokes inject hum into output caps?
  49. Pickering 132e record compensator
  50. Gain in Aikido for F4 + fe208ez?
  51. Audio note kit 1 power transformer
  52. DC Cancellation using Secondary Winding of Gapless OPT
  53. help for power transformer for scott 99d amp
  54. New rack mounted chassis
  55. Altec 342B bridging
  56. Kofi's Uniamp
  57. Please help with vexing grounding issue
  58. 6V6 class A2
  59. Buzzing Preamp
  60. 6922/E88CC in Parallel Mode without Cathode Resistors?
  61. 211 based on iGoliath Amplifier
  62. Art Audio UK dm vps
  63. Power supply conversion.
  64. EL84/6BQ5 tube amp project
  65. Little Bear P8 Amp Questions.
  66. 6k6 gt rca radiotron tube ?????
  67. The Guiguang 300B have good bass ?
  68. Ampex 300 Input Transformer
  69. Recap Heathkit A-7 amplifier.
  70. Testing KT-120
  71. 27GB5/PL504 The Same?
  72. Running Eico ST70 at 90 volts.
  73. TU-8200 with speakers 94db
  74. Magic behind Mentor
  75. dn2540 noise
  76. Rectifier PIV derated for altitude ?
  77. CLC psu for headamp?
  78. Teeco 610d amplifier schematic
  79. Has anyone tried the Aleph CCS in a tube amp?
  80. Question on 6 pin umbilical cord for tube power supply
  81. Transformer Spacing
  82. Can this be done?
  83. Low Voltage (60V) Stereo Tube Amplifier for Dummies (2+2W)
  84. Comparing OPS.
  85. Question on PSUD2 or My Ignorance!
  86. 8BU11 pentode section driving output transformer
  87. Schematic for Cary 300SEI
  88. parallel tubes
  89. 211 grid current
  90. Issues with Mcintosh MC2000
  91. 833a spud amplifier
  92. Klipsch 6.5" Bookshelf Good for 1W SE?
  93. Pete Millett Compactron Triple triode push-pull driver PCB for 6L6GC AB2 amp
  94. Sonic Frontiers Line 3 tubes and cap recommendations
  95. Problem with my Tentlab Transport
  96. Cheap and Cheerful GE 35EH5 SE Amp That Hums
  97. Bench Power Supply Safety
  98. Comments on this preamp?
  99. VoltSecond things that make You say OUCH!
  100. 'Selectron' tubes: From where?
  101. Tony's 6C33 pp amp build progress....
  102. power transformer voltage change
  103. Getting the Urge to Play More
  104. Valve Testing - Help
  105. 10Y/VT-25
  106. GM-70 Socket
  107. Radical Reshape of Magnavox Console Amp
  108. JC Morrison
  109. Daven 3 tube amplifier
  110. ecc82/83 questions
  111. Australian AWV Valve Date Codes
  112. Increasing feedback to Tubelab simple pp
  113. Anyone need a 5U4 ?
  114. Help in identify manufacturer (chicken feet?)
  115. g1 grid stoppers
  116. Lot of tubes needs a new home.....
  117. Differential Bias
  118. British Vacuum Cleaner £ Eng Co Ltd - Goblin
  119. output cap and stepped vol advice. Cary SLP50
  120. Sony TC-500 Gives Its All
  121. Another 211 monobloc
  122. 6N1P-EV Voskhod or Anod manufactured better sounding?
  123. help with long tail pair bandwidth
  124. Anyone have both an Eico HF-81 and Akai M-8?
  125. Sylvania Engineering Sample 12ax7
  126. Diy toroid transformers for 5E3 guitar amp?
  127. Between 5AR4/GZ34, 6CH3/6CJ3 and 6D22S anode resistance
  128. One-tube simple amplifier sound experiment
  129. CK1006 ignition voltage?
  130. First build- dual mono octal linestage
  131. schematic for Baldwin 3 chan organ amp
  132. output transformer inquiry.
  133. 807 triode strapped amp - few questions
  134. HV power supply with filament bias
  135. newbie with oldie! (klemt m40 valve amp)
  136. too high voltage supply HELP
  137. 6Y6G Triode Curves
  138. A Tube buffer question from a Tube newbie
  139. Marantz 7c Question - HELP !
  140. Western Electric 555 receiver (Horn Driver)
  141. Getter heater & B+ sequencing ?
  142. Tube Amplifier with 30P1S SE
  143. Little OTL / Class " A "
  144. ATC SEMITEC DIODE, CURRENT REGULATOR
  145. seperate heater transformer advice please
  146. MQ 420-SL OTs
  147. Frequency Response of Williamson Amplifier in LTspice
  148. Edcor transformer upgrade for K12G tube amp?
  149. Transformers placement under PCB
  150. OT PP Hashimoto HW-100-5 tube amp?
  151. Winding an output transformer for headphones ? Some questions
  152. Push Pull OPT Primary Impedance
  153. Tube compliment substitution question. 6gw8 to ?
  154. Watts or Db/watt ?
  155. A question about the OPT Design Assistant software and Impedance matching
  156. XF86
  157. GM70 OTL ???
  158. Output transformer impedance matching
  159. Distortion in 1 channel
  160. HV Electrolytic Caps Question
  161. need to know operating voltage for 6f6 tube amp
  162. The 2A3 build is in dream state
  163. Alembic F2B clone hum & noise
  164. Spice Question
  165. Are large SE amps like 211/845 viable!
  166. Power transformer & heater wiring questions
  167. Parallel KT88 SET Amp
  168. Why people keep talking about using pentodes in triode mode for power amp?
  169. Mono series attenuators vs. PEC for balance control?
  170. TubeTech e813cc Pair for sale on eBay.
  171. Help with new pp kt77
  172. Is 5 Watts enough?
  173. First amp advice for a Newbie
  174. Tube/valve stuff in Tokyo
  175. Advice for a neophyte
  176. EML300B reliability
  177. User's Manual Golden Tube SEP1
  178. DIY to compete with commercial
  179. Ferrite Core vs. Laminations for 2 watt OPT
  180. generating burst waveform in OrCAD® Capture program
  181. O.T. with Litz wire
  182. Valve upgrade T.A.C. 34MK
  183. Another KT88 SE Abdellah with bias issues
  184. Lowering plate dissipation
  185. A helping hand with a diyed 5687 pre, anyone?
  186. Curtis Mathes Royal Dane
  187. Buzzing decreasing with volume
  188. Fluro Ballast as DIY choke?
  189. 5R4GA ws 5R4WGB
  190. Vintage Webcor Reel to Reel Cap Value Replacement
  191. Coupling Capacitor question
  192. Aikido preamp: 12AU7 or 6CF7/6FQ7 ???
  193. Help needed to identify this Knight Mono Integrated Amp
  194. Winding my own OT
  195. Need a scope screenshot/photo of a Tube clipping
  196. isolating tube sockets
  197. tube cathode bias question: resistor / diode
  198. Silicon Chip mag "Currawong" amp
  199. Vibration spec of 6L6GC ?
  200. Output Transformer Question
  201. 6V6/6l6/EL34/KT66/KT77/6550/KT88 Primaries/ input/loads
  202. Question about HK Citation V schematics
  203. Multi-purpose Tube Preamp - need some help
  204. Vacuum Tube Workshop
  205. Constant Current Heater Source
  206. Tube amp channel loading
  207. Sexy Westra loudspeakers looking for a match
  208. KT90 parallel push pull design
  209. Beard P100 mk1 owners? And some questions.
  210. Hybrid OTL amplifier
  211. heater issue?
  212. negative bias supply
  213. The hardest part about a DIY tube amp is.....
  214. 6N2P-EV driving 6C33
  215. DIY THD Tube Tester / Analyzer
  216. 2.3 watt x 4 or 5 watt x2 SET amplifier using DECWARE Zkit1 and Zkit4 schematics
  217. Cathode follower topology
  218. Line level connected direct to split phase on EL34 PPP?
  219. 13E1 Stereo Single Ended Amp
  220. Apex PA94 Opamp Power Tube Driver
  221. STEM Amplifier Final Pre-Build Checkpoint
  222. thoriated tungsten triodes tetrodes pentodes
  223. BAT-VK 60 Pls help need repair ;(
  224. Switching on an old amplifier?
  225. elevated filament voltages
  226. Opinnions on Gold Lion KT77
  227. DIY Tube amplifier, Transformer question.
  228. Pro reverb AA165 circuit low output from vibrato channel
  229. EF42 for audio applications
  230. strange Tungsram tube
  231. Schematics TVA Mentmore M100 M200
  232. A Thordarson amp project
  233. Help: Tubes for my amp
  234. McIntosh mc40 power transformer
  235. Counterpoint SA-1 preamp schematics?
  236. What would a larger OPT get me?
  237. National VP-311C Tubescope help...
  238. 12AU7 - 12.6V DC heater wiring - noob
  239. I bought a box of tubes at an estate sale today
  240. Thermistors to prevent heater current inrush?
  241. can SE bass be as good as PP ?
  242. 2A3 cathode resistor/cap question
  243. class a output ct basic question
  244. Recent popularity of Leak TL-12
  245. bleeder resistor placement w/ power supply choke
  246. cd burner hum w tube stereo
  247. Clipping - Saturation or Mismatching Impedance?
  248. Transformer for K12g tube amp
  249. PowerTrannyHeatRemovalViaHeatSinkRadiatorPassive
  250. "Novel" push pull driver circuit

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