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  1. unison research unico thump on power on?
  2. CCS Not Working
  3. Allied 333 Hum
  4. EL34 Grid 3 connection
  5. The differential amplifier
  6. low power otl amplifier
  7. Using two stage opamp as first gain stage of power amp.
  8. Standing opts and lying pts?
  9. Tube substitition wanted
  10. Fatman Wi-Tube Hybrid Valve Amplifier with FatDock - No Output
  11. Operating point for 6SN7
  12. Which is the ultimate, perfect negative feedback amount you recommend in UL SE?
  13. Where to buy McIntosh Tube Amplifier Parts?
  14. comments/corrections on 6bg6 pp triode amp
  15. Question about LTP in Morgan Jones' book
  16. Matching 16 ohm loudspeaker into 8 ohm output transformer: can i do any modification?
  17. EL34 SE ultralinear configuration working as a triode: pro and cons
  18. First Build Help Needed - Transformer
  19. dynaco st70 headphone amp
  20. Velleman 4040 rebuild
  21. help needed for heater wiring of a 300B
  22. Best UX4 sockets?
  23. Filson 216 phono rework, advice please
  24. IRFS820B
  25. Help converting integrated amp to preamp
  26. 6N16B triodes: asking advice
  27. D3a IV
  28. stability of bias of KT88 in Xindak V30
  29. half 6SN7 / 6CG7 7pin mini substitute?
  30. Simple Line Stage
  31. 6L6GC redplating - what say you please?
  32. Yaqin MC-10L no bass response
  33. My first phono pre
  34. Fet rectifier?
  35. PSpice simulation
  36. Two-cases amplifier, question about power switch
  37. VTL bias problems compact 100
  38. Assembly Manual heathkit a7-b
  39. Question about CCS used in Morgan Jones' book.
  40. Layout question -- Do PS chokes inject hum into output caps?
  41. Pickering 132e record compensator
  42. Gain in Aikido for F4 + fe208ez?
  43. Audio note kit 1 power transformer
  44. DC Cancellation using Secondary Winding of Gapless OPT
  45. help for power transformer for scott 99d amp
  46. New rack mounted chassis
  47. Altec 342B bridging
  48. Kofi's Uniamp
  49. Please help with vexing grounding issue
  50. 6V6 class A2
  51. Buzzing Preamp
  52. 6922/E88CC in Parallel Mode without Cathode Resistors?
  53. 211 based on iGoliath Amplifier
  54. Art Audio UK dm vps
  55. Power supply conversion.
  56. EL84/6BQ5 tube amp project
  57. Little Bear P8 Amp Questions.
  58. 6k6 gt rca radiotron tube ?????
  59. The Guiguang 300B have good bass ?
  60. Ampex 300 Input Transformer
  61. Recap Heathkit A-7 amplifier.
  62. Testing KT-120
  63. 27GB5/PL504 The Same?
  64. Running Eico ST70 at 90 volts.
  65. TU-8200 with speakers 94db
  66. Magic behind Mentor
  67. dn2540 noise
  68. Rectifier PIV derated for altitude ?
  69. CLC psu for headamp?
  70. Teeco 610d amplifier schematic
  71. Has anyone tried the Aleph CCS in a tube amp?
  72. Question on 6 pin umbilical cord for tube power supply
  73. Transformer Spacing
  74. Can this be done?
  75. Low Voltage (60V) Stereo Tube Amplifier for Dummies (2+2W)
  76. Comparing OPS.
  77. Question on PSUD2 or My Ignorance!
  78. 8BU11 pentode section driving output transformer
  79. Schematic for Cary 300SEI
  80. parallel tubes
  81. 211 grid current
  82. Issues with Mcintosh MC2000
  83. 833a spud amplifier
  84. Klipsch 6.5" Bookshelf Good for 1W SE?
  85. Pete Millett Compactron Triple triode push-pull driver PCB for 6L6GC AB2 amp
  86. Sonic Frontiers Line 3 tubes and cap recommendations
  87. Problem with my Tentlab Transport
  88. Cheap and Cheerful GE 35EH5 SE Amp That Hums
  89. Bench Power Supply Safety
  90. Comments on this preamp?
  91. VoltSecond things that make You say OUCH!
  92. 'Selectron' tubes: From where?
  93. Tony's 6C33 pp amp build progress....
  94. power transformer voltage change
  95. Getting the Urge to Play More
  96. Valve Testing - Help
  97. 10Y/VT-25
  98. GM-70 Socket
  99. Radical Reshape of Magnavox Console Amp
  100. JC Morrison
  101. Daven 3 tube amplifier
  102. ecc82/83 questions
  103. Australian AWV Valve Date Codes
  104. Increasing feedback to Tubelab simple pp
  105. Anyone need a 5U4 ?
  106. Help in identify manufacturer (chicken feet?)
  107. g1 grid stoppers
  108. Lot of tubes needs a new home.....
  109. Differential Bias
  110. British Vacuum Cleaner £ Eng Co Ltd - Goblin
  111. output cap and stepped vol advice. Cary SLP50
  112. Sony TC-500 Gives Its All
  113. Another 211 monobloc
  114. 6N1P-EV Voskhod or Anod manufactured better sounding?
  115. help with long tail pair bandwidth
  116. Anyone have both an Eico HF-81 and Akai M-8?
  117. Sylvania Engineering Sample 12ax7
  118. Diy toroid transformers for 5E3 guitar amp?
  119. Between 5AR4/GZ34, 6CH3/6CJ3 and 6D22S anode resistance
  120. One-tube simple amplifier sound experiment
  121. CK1006 ignition voltage?
  122. First build- dual mono octal linestage
  123. schematic for Baldwin 3 chan organ amp
  124. output transformer inquiry.
  125. 807 triode strapped amp - few questions
  126. HV power supply with filament bias
  127. newbie with oldie! (klemt m40 valve amp)
  128. too high voltage supply HELP
  129. 6Y6G Triode Curves
  130. A Tube buffer question from a Tube newbie
  131. Marantz 7c Question - HELP !
  132. Western Electric 555 receiver (Horn Driver)
  133. Getter heater & B+ sequencing ?
  134. Tube Amplifier with 30P1S SE
  135. Little OTL / Class " A "
  136. ATC SEMITEC DIODE, CURRENT REGULATOR
  137. seperate heater transformer advice please
  138. MQ 420-SL OTs
  139. Frequency Response of Williamson Amplifier in LTspice
  140. Edcor transformer upgrade for K12G tube amp?
  141. Transformers placement under PCB
  142. OT PP Hashimoto HW-100-5 tube amp?
  143. Winding an output transformer for headphones ? Some questions
  144. Push Pull OPT Primary Impedance
  145. Tube compliment substitution question. 6gw8 to ?
  146. Watts or Db/watt ?
  147. A question about the OPT Design Assistant software and Impedance matching
  148. XF86
  149. GM70 OTL ???
  150. Output transformer impedance matching
  151. Distortion in 1 channel
  152. HV Electrolytic Caps Question
  153. need to know operating voltage for 6f6 tube amp
  154. The 2A3 build is in dream state
  155. Alembic F2B clone hum & noise
  156. Spice Question
  157. Are large SE amps like 211/845 viable!
  158. Power transformer & heater wiring questions
  159. Parallel KT88 SET Amp
  160. Why people keep talking about using pentodes in triode mode for power amp?
  161. Mono series attenuators vs. PEC for balance control?
  162. TubeTech e813cc Pair for sale on eBay.
  163. Help with new pp kt77
  164. Is 5 Watts enough?
  165. First amp advice for a Newbie
  166. Tube/valve stuff in Tokyo
  167. Advice for a neophyte
  168. EML300B reliability
  169. User's Manual Golden Tube SEP1
  170. DIY to compete with commercial
  171. Ferrite Core vs. Laminations for 2 watt OPT
  172. generating burst waveform in OrCAD® Capture program
  173. O.T. with Litz wire
  174. Valve upgrade T.A.C. 34MK
  175. Another KT88 SE Abdellah with bias issues
  176. Lowering plate dissipation
  177. A helping hand with a diyed 5687 pre, anyone?
  178. Curtis Mathes Royal Dane
  179. Buzzing decreasing with volume
  180. Fluro Ballast as DIY choke?
  181. 5R4GA ws 5R4WGB
  182. Vintage Webcor Reel to Reel Cap Value Replacement
  183. Coupling Capacitor question
  184. Aikido preamp: 12AU7 or 6CF7/6FQ7 ???
  185. Help needed to identify this Knight Mono Integrated Amp
  186. Winding my own OT
  187. Need a scope screenshot/photo of a Tube clipping
  188. isolating tube sockets
  189. tube cathode bias question: resistor / diode
  190. Silicon Chip mag "Currawong" amp
  191. Vibration spec of 6L6GC ?
  192. Output Transformer Question
  193. 6V6/6l6/EL34/KT66/KT77/6550/KT88 Primaries/ input/loads
  194. Question about HK Citation V schematics
  195. Multi-purpose Tube Preamp - need some help
  196. Vacuum Tube Workshop
  197. Constant Current Heater Source
  198. Tube amp channel loading
  199. Sexy Westra loudspeakers looking for a match
  200. KT90 parallel push pull design
  201. Beard P100 mk1 owners? And some questions.
  202. Hybrid OTL amplifier
  203. heater issue?
  204. negative bias supply
  205. The hardest part about a DIY tube amp is.....
  206. 6N2P-EV driving 6C33
  207. DIY THD Tube Tester / Analyzer
  208. 2.3 watt x 4 or 5 watt x2 SET amplifier using DECWARE Zkit1 and Zkit4 schematics
  209. Cathode follower topology
  210. Line level connected direct to split phase on EL34 PPP?
  211. 13E1 Stereo Single Ended Amp
  212. Apex PA94 Opamp Power Tube Driver
  213. STEM Amplifier Final Pre-Build Checkpoint
  214. thoriated tungsten triodes tetrodes pentodes
  215. BAT-VK 60 Pls help need repair ;(
  216. Switching on an old amplifier?
  217. elevated filament voltages
  218. Opinnions on Gold Lion KT77
  219. DIY Tube amplifier, Transformer question.
  220. Pro reverb AA165 circuit low output from vibrato channel
  221. EF42 for audio applications
  222. strange Tungsram tube
  223. Schematics TVA Mentmore M100 M200
  224. A Thordarson amp project
  225. Help: Tubes for my amp
  226. McIntosh mc40 power transformer
  227. Counterpoint SA-1 preamp schematics?
  228. What would a larger OPT get me?
  229. National VP-311C Tubescope help...
  230. 12AU7 - 12.6V DC heater wiring - noob
  231. I bought a box of tubes at an estate sale today
  232. Thermistors to prevent heater current inrush?
  233. can SE bass be as good as PP ?
  234. 2A3 cathode resistor/cap question
  235. class a output ct basic question
  236. Recent popularity of Leak TL-12
  237. bleeder resistor placement w/ power supply choke
  238. cd burner hum w tube stereo
  239. Clipping - Saturation or Mismatching Impedance?
  240. Transformer for K12g tube amp
  241. PowerTrannyHeatRemovalViaHeatSinkRadiatorPassive
  242. "Novel" push pull driver circuit
  243. Feedback lead/lag compensation
  244. ASC Metal Polypropylene Caps
  245. help with Signature Technology mono amp
  246. 7591
  247. EL34 integrated amp power loss
  248. Use treble or bass amp for midrange?
  249. Question about a SET 2A3/45
  250. western electric 124 amplifier

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