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  1. Operating point for 6SN7
  2. Which is the ultimate, perfect negative feedback amount you recommend in UL SE?
  3. Where to buy McIntosh Tube Amplifier Parts?
  4. comments/corrections on 6bg6 pp triode amp
  5. Question about LTP in Morgan Jones' book
  6. Matching 16 ohm loudspeaker into 8 ohm output transformer: can i do any modification?
  7. EL34 SE ultralinear configuration working as a triode: pro and cons
  8. First Build Help Needed - Transformer
  9. dynaco st70 headphone amp
  10. Velleman 4040 rebuild
  11. help needed for heater wiring of a 300B
  12. Best UX4 sockets?
  13. Filson 216 phono rework, advice please
  14. IRFS820B
  15. Help converting integrated amp to preamp
  16. 6N16B triodes: asking advice
  17. D3a IV
  18. stability of bias of KT88 in Xindak V30
  19. half 6SN7 / 6CG7 7pin mini substitute?
  20. Simple Line Stage
  21. 6L6GC redplating - what say you please?
  22. Yaqin MC-10L no bass response
  23. My first phono pre
  24. Fet rectifier?
  25. PSpice simulation
  26. Two-cases amplifier, question about power switch
  27. VTL bias problems compact 100
  28. Assembly Manual heathkit a7-b
  29. Question about CCS used in Morgan Jones' book.
  30. Layout question -- Do PS chokes inject hum into output caps?
  31. Pickering 132e record compensator
  32. Gain in Aikido for F4 + fe208ez?
  33. Audio note kit 1 power transformer
  34. DC Cancellation using Secondary Winding of Gapless OPT
  35. help for power transformer for scott 99d amp
  36. New rack mounted chassis
  37. Altec 342B bridging
  38. Kofi's Uniamp
  39. Please help with vexing grounding issue
  40. 6V6 class A2
  41. Buzzing Preamp
  42. 6922/E88CC in Parallel Mode without Cathode Resistors?
  43. 211 based on iGoliath Amplifier
  44. Art Audio UK dm vps
  45. Power supply conversion.
  46. EL84/6BQ5 tube amp project
  47. Little Bear P8 Amp Questions.
  48. 6k6 gt rca radiotron tube ?????
  49. The Guiguang 300B have good bass ?
  50. Ampex 300 Input Transformer
  51. Recap Heathkit A-7 amplifier.
  52. Testing KT-120
  53. 27GB5/PL504 The Same?
  54. Running Eico ST70 at 90 volts.
  55. TU-8200 with speakers 94db
  56. Magic behind Mentor
  57. dn2540 noise
  58. Rectifier PIV derated for altitude ?
  59. CLC psu for headamp?
  60. Teeco 610d amplifier schematic
  61. Has anyone tried the Aleph CCS in a tube amp?
  62. Question on 6 pin umbilical cord for tube power supply
  63. Transformer Spacing
  64. Can this be done?
  65. Low Voltage (60V) Stereo Tube Amplifier for Dummies (2+2W)
  66. Comparing OPS.
  67. Question on PSUD2 or My Ignorance!
  68. 8BU11 pentode section driving output transformer
  69. Schematic for Cary 300SEI
  70. parallel tubes
  71. 211 grid current
  72. Issues with Mcintosh MC2000
  73. 833a spud amplifier
  74. Klipsch 6.5" Bookshelf Good for 1W SE?
  75. Pete Millett Compactron Triple triode push-pull driver PCB for 6L6GC AB2 amp
  76. Sonic Frontiers Line 3 tubes and cap recommendations
  77. Problem with my Tentlab Transport
  78. Cheap and Cheerful GE 35EH5 SE Amp That Hums
  79. Bench Power Supply Safety
  80. Comments on this preamp?
  81. VoltSecond things that make You say OUCH!
  82. 'Selectron' tubes: From where?
  83. Tony's 6C33 pp amp build progress....
  84. power transformer voltage change
  85. Getting the Urge to Play More
  86. Valve Testing - Help
  87. 10Y/VT-25
  88. GM-70 Socket
  89. Radical Reshape of Magnavox Console Amp
  90. JC Morrison
  91. Daven 3 tube amplifier
  92. ecc82/83 questions
  93. Australian AWV Valve Date Codes
  94. Increasing feedback to Tubelab simple pp
  95. Anyone need a 5U4 ?
  96. Help in identify manufacturer (chicken feet?)
  97. g1 grid stoppers
  98. Lot of tubes needs a new home.....
  99. Differential Bias
  100. British Vacuum Cleaner £ Eng Co Ltd - Goblin
  101. output cap and stepped vol advice. Cary SLP50
  102. Sony TC-500 Gives Its All
  103. Another 211 monobloc
  104. 6N1P-EV Voskhod or Anod manufactured better sounding?
  105. help with long tail pair bandwidth
  106. Anyone have both an Eico HF-81 and Akai M-8?
  107. Sylvania Engineering Sample 12ax7
  108. Diy toroid transformers for 5E3 guitar amp?
  109. Between 5AR4/GZ34, 6CH3/6CJ3 and 6D22S anode resistance
  110. One-tube simple amplifier sound experiment
  111. CK1006 ignition voltage?
  112. First build- dual mono octal linestage
  113. schematic for Baldwin 3 chan organ amp
  114. output transformer inquiry.
  115. 807 triode strapped amp - few questions
  116. HV power supply with filament bias
  117. newbie with oldie! (klemt m40 valve amp)
  118. too high voltage supply HELP
  119. 6Y6G Triode Curves
  120. A Tube buffer question from a Tube newbie
  121. Marantz 7c Question - HELP !
  122. Western Electric 555 receiver (Horn Driver)
  123. Getter heater & B+ sequencing ?
  124. Tube Amplifier with 30P1S SE
  125. Little OTL / Class " A "
  126. ATC SEMITEC DIODE, CURRENT REGULATOR
  127. seperate heater transformer advice please
  128. MQ 420-SL OTs
  129. Frequency Response of Williamson Amplifier in LTspice
  130. Edcor transformer upgrade for K12G tube amp?
  131. Transformers placement under PCB
  132. OT PP Hashimoto HW-100-5 tube amp?
  133. Winding an output transformer for headphones ? Some questions
  134. Push Pull OPT Primary Impedance
  135. Tube compliment substitution question. 6gw8 to ?
  136. Watts or Db/watt ?
  137. A question about the OPT Design Assistant software and Impedance matching
  138. XF86
  139. GM70 OTL ???
  140. Output transformer impedance matching
  141. Distortion in 1 channel
  142. HV Electrolytic Caps Question
  143. need to know operating voltage for 6f6 tube amp
  144. The 2A3 build is in dream state
  145. Alembic F2B clone hum & noise
  146. Spice Question
  147. Are large SE amps like 211/845 viable!
  148. Power transformer & heater wiring questions
  149. Parallel KT88 SET Amp
  150. Why people keep talking about using pentodes in triode mode for power amp?
  151. Mono series attenuators vs. PEC for balance control?
  152. TubeTech e813cc Pair for sale on eBay.
  153. Help with new pp kt77
  154. Is 5 Watts enough?
  155. First amp advice for a Newbie
  156. Tube/valve stuff in Tokyo
  157. Advice for a neophyte
  158. EML300B reliability
  159. User's Manual Golden Tube SEP1
  160. DIY to compete with commercial
  161. Ferrite Core vs. Laminations for 2 watt OPT
  162. generating burst waveform in OrCAD® Capture program
  163. O.T. with Litz wire
  164. Valve upgrade T.A.C. 34MK
  165. Another KT88 SE Abdellah with bias issues
  166. Lowering plate dissipation
  167. A helping hand with a diyed 5687 pre, anyone?
  168. Curtis Mathes Royal Dane
  169. Buzzing decreasing with volume
  170. Fluro Ballast as DIY choke?
  171. 5R4GA ws 5R4WGB
  172. Vintage Webcor Reel to Reel Cap Value Replacement
  173. Coupling Capacitor question
  174. Aikido preamp: 12AU7 or 6CF7/6FQ7 ???
  175. Help needed to identify this Knight Mono Integrated Amp
  176. Winding my own OT
  177. Need a scope screenshot/photo of a Tube clipping
  178. isolating tube sockets
  179. tube cathode bias question: resistor / diode
  180. Silicon Chip mag "Currawong" amp
  181. Vibration spec of 6L6GC ?
  182. Output Transformer Question
  183. 6V6/6l6/EL34/KT66/KT77/6550/KT88 Primaries/ input/loads
  184. Question about HK Citation V schematics
  185. Multi-purpose Tube Preamp - need some help
  186. Vacuum Tube Workshop
  187. Constant Current Heater Source
  188. Tube amp channel loading
  189. Sexy Westra loudspeakers looking for a match
  190. KT90 parallel push pull design
  191. Beard P100 mk1 owners? And some questions.
  192. Hybrid OTL amplifier
  193. heater issue?
  194. negative bias supply
  195. The hardest part about a DIY tube amp is.....
  196. 6N2P-EV driving 6C33
  197. DIY THD Tube Tester / Analyzer
  198. 2.3 watt x 4 or 5 watt x2 SET amplifier using DECWARE Zkit1 and Zkit4 schematics
  199. Cathode follower topology
  200. Line level connected direct to split phase on EL34 PPP?
  201. 13E1 Stereo Single Ended Amp
  202. Apex PA94 Opamp Power Tube Driver
  203. STEM Amplifier Final Pre-Build Checkpoint
  204. thoriated tungsten triodes tetrodes pentodes
  205. BAT-VK 60 Pls help need repair ;(
  206. Switching on an old amplifier?
  207. elevated filament voltages
  208. Opinnions on Gold Lion KT77
  209. DIY Tube amplifier, Transformer question.
  210. Pro reverb AA165 circuit low output from vibrato channel
  211. EF42 for audio applications
  212. strange Tungsram tube
  213. Schematics TVA Mentmore M100 M200
  214. A Thordarson amp project
  215. Help: Tubes for my amp
  216. McIntosh mc40 power transformer
  217. Counterpoint SA-1 preamp schematics?
  218. What would a larger OPT get me?
  219. National VP-311C Tubescope help...
  220. 12AU7 - 12.6V DC heater wiring - noob
  221. I bought a box of tubes at an estate sale today
  222. Thermistors to prevent heater current inrush?
  223. can SE bass be as good as PP ?
  224. 2A3 cathode resistor/cap question
  225. class a output ct basic question
  226. Recent popularity of Leak TL-12
  227. bleeder resistor placement w/ power supply choke
  228. cd burner hum w tube stereo
  229. Clipping - Saturation or Mismatching Impedance?
  230. Transformer for K12g tube amp
  231. PowerTrannyHeatRemovalViaHeatSinkRadiatorPassive
  232. "Novel" push pull driver circuit
  233. Feedback lead/lag compensation
  234. ASC Metal Polypropylene Caps
  235. help with Signature Technology mono amp
  236. 7591
  237. EL34 integrated amp power loss
  238. Use treble or bass amp for midrange?
  239. Question about a SET 2A3/45
  240. western electric 124 amplifier
  241. el34 power loss in right channel
  242. Ei Silver Plate 12AX7 cathode color ?
  243. Does parafeed really improve sound?
  244. Can I use this choke
  245. Calculating 6922/E88CC/ECC88 cathode follower for 90V anode
  246. ST70 coupling caps eyelet location on PC-3?
  247. Some help with PCL86 Headphone amp Project
  248. Top (sound) quality valve phono stage
  249. Calculating cathode follower using 12AU7 for 90V supply
  250. Cathode resistor

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