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  1. Filson 216 phono rework, advice please
  2. IRFS820B
  3. Help converting integrated amp to preamp
  4. 6N16B triodes: asking advice
  5. D3a IV
  6. stability of bias of KT88 in Xindak V30
  7. half 6SN7 / 6CG7 7pin mini substitute?
  8. Simple Line Stage
  9. 6L6GC redplating - what say you please?
  10. Yaqin MC-10L no bass response
  11. My first phono pre
  12. Fet rectifier?
  13. PSpice simulation
  14. Two-cases amplifier, question about power switch
  15. VTL bias problems compact 100
  16. Assembly Manual heathkit a7-b
  17. Question about CCS used in Morgan Jones' book.
  18. Layout question -- Do PS chokes inject hum into output caps?
  19. Pickering 132e record compensator
  20. Gain in Aikido for F4 + fe208ez?
  21. Audio note kit 1 power transformer
  22. DC Cancellation using Secondary Winding of Gapless OPT
  23. help for power transformer for scott 99d amp
  24. New rack mounted chassis
  25. Altec 342B bridging
  26. Kofi's Uniamp
  27. Please help with vexing grounding issue
  28. 6V6 class A2
  29. Buzzing Preamp
  30. 6922/E88CC in Parallel Mode without Cathode Resistors?
  31. 211 based on iGoliath Amplifier
  32. Art Audio UK dm vps
  33. Power supply conversion.
  34. EL84/6BQ5 tube amp project
  35. Little Bear P8 Amp Questions.
  36. 6k6 gt rca radiotron tube ?????
  37. The Guiguang 300B have good bass ?
  38. Ampex 300 Input Transformer
  39. Recap Heathkit A-7 amplifier.
  40. Testing KT-120
  41. 27GB5/PL504 The Same?
  42. Running Eico ST70 at 90 volts.
  43. TU-8200 with speakers 94db
  44. Magic behind Mentor
  45. dn2540 noise
  46. Rectifier PIV derated for altitude ?
  47. CLC psu for headamp?
  48. Teeco 610d amplifier schematic
  49. Has anyone tried the Aleph CCS in a tube amp?
  50. Question on 6 pin umbilical cord for tube power supply
  51. Transformer Spacing
  52. Can this be done?
  53. Low Voltage (60V) Stereo Tube Amplifier for Dummies (2+2W)
  54. Comparing OPS.
  55. Question on PSUD2 or My Ignorance!
  56. 8BU11 pentode section driving output transformer
  57. Schematic for Cary 300SEI
  58. parallel tubes
  59. 211 grid current
  60. Issues with Mcintosh MC2000
  61. 833a spud amplifier
  62. Klipsch 6.5" Bookshelf Good for 1W SE?
  63. Pete Millett Compactron Triple triode push-pull driver PCB for 6L6GC AB2 amp
  64. Sonic Frontiers Line 3 tubes and cap recommendations
  65. Problem with my Tentlab Transport
  66. Cheap and Cheerful GE 35EH5 SE Amp That Hums
  67. Bench Power Supply Safety
  68. Comments on this preamp?
  69. VoltSecond things that make You say OUCH!
  70. 'Selectron' tubes: From where?
  71. Tony's 6C33 pp amp build progress....
  72. power transformer voltage change
  73. Getting the Urge to Play More
  74. Valve Testing - Help
  75. 10Y/VT-25
  76. GM-70 Socket
  77. Radical Reshape of Magnavox Console Amp
  78. JC Morrison
  79. Daven 3 tube amplifier
  80. ecc82/83 questions
  81. Australian AWV Valve Date Codes
  82. Increasing feedback to Tubelab simple pp
  83. Anyone need a 5U4 ?
  84. Help in identify manufacturer (chicken feet?)
  85. g1 grid stoppers
  86. Lot of tubes needs a new home.....
  87. Differential Bias
  88. British Vacuum Cleaner £ Eng Co Ltd - Goblin
  89. output cap and stepped vol advice. Cary SLP50
  90. Sony TC-500 Gives Its All
  91. Another 211 monobloc
  92. 6N1P-EV Voskhod or Anod manufactured better sounding?
  93. help with long tail pair bandwidth
  94. Anyone have both an Eico HF-81 and Akai M-8?
  95. Sylvania Engineering Sample 12ax7
  96. Diy toroid transformers for 5E3 guitar amp?
  97. Between 5AR4/GZ34, 6CH3/6CJ3 and 6D22S anode resistance
  98. One-tube simple amplifier sound experiment
  99. CK1006 ignition voltage?
  100. First build- dual mono octal linestage
  101. schematic for Baldwin 3 chan organ amp
  102. output transformer inquiry.
  103. 807 triode strapped amp - few questions
  104. HV power supply with filament bias
  105. newbie with oldie! (klemt m40 valve amp)
  106. too high voltage supply HELP
  107. 6Y6G Triode Curves
  108. A Tube buffer question from a Tube newbie
  109. Marantz 7c Question - HELP !
  110. Western Electric 555 receiver (Horn Driver)
  111. Getter heater & B+ sequencing ?
  112. Tube Amplifier with 30P1S SE
  113. Little OTL / Class " A "
  114. ATC SEMITEC DIODE, CURRENT REGULATOR
  115. seperate heater transformer advice please
  116. MQ 420-SL OTs
  117. Frequency Response of Williamson Amplifier in LTspice
  118. Edcor transformer upgrade for K12G tube amp?
  119. Transformers placement under PCB
  120. OT PP Hashimoto HW-100-5 tube amp?
  121. Winding an output transformer for headphones ? Some questions
  122. Push Pull OPT Primary Impedance
  123. Tube compliment substitution question. 6gw8 to ?
  124. Watts or Db/watt ?
  125. A question about the OPT Design Assistant software and Impedance matching
  126. XF86
  127. GM70 OTL ???
  128. Output transformer impedance matching
  129. Distortion in 1 channel
  130. HV Electrolytic Caps Question
  131. need to know operating voltage for 6f6 tube amp
  132. The 2A3 build is in dream state
  133. Alembic F2B clone hum & noise
  134. Spice Question
  135. Are large SE amps like 211/845 viable!
  136. Power transformer & heater wiring questions
  137. Parallel KT88 SET Amp
  138. Why people keep talking about using pentodes in triode mode for power amp?
  139. Mono series attenuators vs. PEC for balance control?
  140. TubeTech e813cc Pair for sale on eBay.
  141. Help with new pp kt77
  142. Is 5 Watts enough?
  143. First amp advice for a Newbie
  144. Tube/valve stuff in Tokyo
  145. Advice for a neophyte
  146. EML300B reliability
  147. User's Manual Golden Tube SEP1
  148. DIY to compete with commercial
  149. Ferrite Core vs. Laminations for 2 watt OPT
  150. generating burst waveform in OrCAD® Capture program
  151. O.T. with Litz wire
  152. Valve upgrade T.A.C. 34MK
  153. Another KT88 SE Abdellah with bias issues
  154. Lowering plate dissipation
  155. A helping hand with a diyed 5687 pre, anyone?
  156. Curtis Mathes Royal Dane
  157. Buzzing decreasing with volume
  158. Fluro Ballast as DIY choke?
  159. 5R4GA ws 5R4WGB
  160. Vintage Webcor Reel to Reel Cap Value Replacement
  161. Coupling Capacitor question
  162. Aikido preamp: 12AU7 or 6CF7/6FQ7 ???
  163. Help needed to identify this Knight Mono Integrated Amp
  164. Winding my own OT
  165. Need a scope screenshot/photo of a Tube clipping
  166. isolating tube sockets
  167. tube cathode bias question: resistor / diode
  168. Silicon Chip mag "Currawong" amp
  169. Vibration spec of 6L6GC ?
  170. Output Transformer Question
  171. 6V6/6l6/EL34/KT66/KT77/6550/KT88 Primaries/ input/loads
  172. Question about HK Citation V schematics
  173. Multi-purpose Tube Preamp - need some help
  174. Vacuum Tube Workshop
  175. Constant Current Heater Source
  176. Tube amp channel loading
  177. Sexy Westra loudspeakers looking for a match
  178. KT90 parallel push pull design
  179. Beard P100 mk1 owners? And some questions.
  180. Hybrid OTL amplifier
  181. heater issue?
  182. negative bias supply
  183. The hardest part about a DIY tube amp is.....
  184. 6N2P-EV driving 6C33
  185. DIY THD Tube Tester / Analyzer
  186. 2.3 watt x 4 or 5 watt x2 SET amplifier using DECWARE Zkit1 and Zkit4 schematics
  187. Cathode follower topology
  188. Line level connected direct to split phase on EL34 PPP?
  189. 13E1 Stereo Single Ended Amp
  190. Apex PA94 Opamp Power Tube Driver
  191. STEM Amplifier Final Pre-Build Checkpoint
  192. thoriated tungsten triodes tetrodes pentodes
  193. BAT-VK 60 Pls help need repair ;(
  194. Switching on an old amplifier?
  195. elevated filament voltages
  196. Opinnions on Gold Lion KT77
  197. DIY Tube amplifier, Transformer question.
  198. Pro reverb AA165 circuit low output from vibrato channel
  199. EF42 for audio applications
  200. strange Tungsram tube
  201. Schematics TVA Mentmore M100 M200
  202. A Thordarson amp project
  203. Help: Tubes for my amp
  204. McIntosh mc40 power transformer
  205. Counterpoint SA-1 preamp schematics?
  206. What would a larger OPT get me?
  207. National VP-311C Tubescope help...
  208. 12AU7 - 12.6V DC heater wiring - noob
  209. I bought a box of tubes at an estate sale today
  210. Thermistors to prevent heater current inrush?
  211. can SE bass be as good as PP ?
  212. 2A3 cathode resistor/cap question
  213. class a output ct basic question
  214. Recent popularity of Leak TL-12
  215. bleeder resistor placement w/ power supply choke
  216. cd burner hum w tube stereo
  217. Clipping - Saturation or Mismatching Impedance?
  218. Transformer for K12g tube amp
  219. PowerTrannyHeatRemovalViaHeatSinkRadiatorPassive
  220. "Novel" push pull driver circuit
  221. Feedback lead/lag compensation
  222. ASC Metal Polypropylene Caps
  223. help with Signature Technology mono amp
  224. 7591
  225. EL34 integrated amp power loss
  226. Use treble or bass amp for midrange?
  227. Question about a SET 2A3/45
  228. western electric 124 amplifier
  229. el34 power loss in right channel
  230. Ei Silver Plate 12AX7 cathode color ?
  231. Does parafeed really improve sound?
  232. Can I use this choke
  233. Calculating 6922/E88CC/ECC88 cathode follower for 90V anode
  234. ST70 coupling caps eyelet location on PC-3?
  235. Some help with PCL86 Headphone amp Project
  236. Top (sound) quality valve phono stage
  237. Calculating cathode follower using 12AU7 for 90V supply
  238. Cathode resistor
  239. Help with an old Capitol
  240. Cathode bypass cap
  241. balanced post-OT line output?
  242. Blown SE mono, troubleshoot
  243. What is this circuit for?
  244. Siemens EL 86 NOS?
  245. Valve Operational Amplifiers
  246. What will be the best drive to 211 tube?
  247. Dual 845 SE A2 questions
  248. Harman Kardon Citation I, II, & III (Special thanks to Jim McShane and Eli Duttman!)
  249. Heater rewiring from 6N2 to 12AX7 with 6.3VAC
  250. heater bias value

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