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  1. Differential Bias
  2. British Vacuum Cleaner Eng Co Ltd - Goblin
  3. output cap and stepped vol advice. Cary SLP50
  4. Sony TC-500 Gives Its All
  5. Another 211 monobloc
  6. 6N1P-EV Voskhod or Anod manufactured better sounding?
  7. help with long tail pair bandwidth
  8. Anyone have both an Eico HF-81 and Akai M-8?
  9. Sylvania Engineering Sample 12ax7
  10. Between 5AR4/GZ34, 6CH3/6CJ3 and 6D22S anode resistance
  11. One-tube simple amplifier sound experiment
  12. CK1006 ignition voltage?
  13. First build- dual mono octal linestage
  14. schematic for Baldwin 3 chan organ amp
  15. output transformer inquiry.
  16. 807 triode strapped amp - few questions
  17. HV power supply with filament bias
  18. newbie with oldie! (klemt m40 valve amp)
  19. too high voltage supply HELP
  20. 6Y6G Triode Curves
  21. A Tube buffer question from a Tube newbie
  22. Marantz 7c Question - HELP !
  23. Western Electric 555 receiver (Horn Driver)
  24. Getter heater & B+ sequencing ?
  25. Tube Amplifier with 30P1S SE
  26. Little OTL / Class " A "
  27. ATC SEMITEC DIODE, CURRENT REGULATOR
  28. seperate heater transformer advice please
  29. MQ 420-SL OTs
  30. Frequency Response of Williamson Amplifier in LTspice
  31. Edcor transformer upgrade for K12G tube amp?
  32. Transformers placement under PCB
  33. OT PP Hashimoto HW-100-5 tube amp?
  34. Winding an output transformer for headphones ? Some questions
  35. Push Pull OPT Primary Impedance
  36. Tube compliment substitution question. 6gw8 to ?
  37. Watts or Db/watt ?
  38. A question about the OPT Design Assistant software and Impedance matching
  39. XF86
  40. GM70 OTL ???
  41. Output transformer impedance matching
  42. Distortion in 1 channel
  43. need to know operating voltage for 6f6 tube amp
  44. The 2A3 build is in dream state
  45. Alembic F2B clone hum & noise
  46. Spice Question
  47. Are large SE amps like 211/845 viable!
  48. Power transformer & heater wiring questions
  49. Parallel KT88 SET Amp
  50. Why people keep talking about using pentodes in triode mode for power amp?
  51. Mono series attenuators vs. PEC for balance control?
  52. TubeTech e813cc Pair for sale on eBay.
  53. Help with new pp kt77
  54. Is 5 Watts enough?
  55. First amp advice for a Newbie
  56. Tube/valve stuff in Tokyo
  57. Advice for a neophyte
  58. EML300B reliability
  59. User's Manual Golden Tube SEP1
  60. DIY to compete with commercial
  61. Ferrite Core vs. Laminations for 2 watt OPT
  62. generating burst waveform in OrCAD Capture program
  63. O.T. with Litz wire
  64. Valve upgrade T.A.C. 34MK
  65. Another KT88 SE Abdellah with bias issues
  66. Lowering plate dissipation
  67. A helping hand with a diyed 5687 pre, anyone?
  68. Curtis Mathes Royal Dane
  69. Buzzing decreasing with volume
  70. Fluro Ballast as DIY choke?
  71. 5R4GA ws 5R4WGB
  72. Vintage Webcor Reel to Reel Cap Value Replacement
  73. Coupling Capacitor question
  74. Aikido preamp: 12AU7 or 6CF7/6FQ7 ???
  75. Help needed to identify this Knight Mono Integrated Amp
  76. Winding my own OT
  77. Need a scope screenshot/photo of a Tube clipping
  78. isolating tube sockets
  79. tube cathode bias question: resistor / diode
  80. Silicon Chip mag "Currawong" amp
  81. Vibration spec of 6L6GC ?
  82. Output Transformer Question
  83. 6V6/6l6/EL34/KT66/KT77/6550/KT88 Primaries/ input/loads
  84. Question about HK Citation V schematics
  85. Multi-purpose Tube Preamp - need some help
  86. Vacuum Tube Workshop
  87. Constant Current Heater Source
  88. Tube amp channel loading
  89. Sexy Westra loudspeakers looking for a match
  90. KT90 parallel push pull design
  91. Beard P100 mk1 owners? And some questions.
  92. Hybrid OTL amplifier
  93. heater issue?
  94. negative bias supply
  95. The hardest part about a DIY tube amp is.....
  96. 6N2P-EV driving 6C33
  97. DIY THD Tube Tester / Analyzer
  98. 2.3 watt x 4 or 5 watt x2 SET amplifier using DECWARE Zkit1 and Zkit4 schematics
  99. Cathode follower topology
  100. Line level connected direct to split phase on EL34 PPP?
  101. 13E1 Stereo Single Ended Amp
  102. Apex PA94 Opamp Power Tube Driver
  103. STEM Amplifier Final Pre-Build Checkpoint
  104. thoriated tungsten triodes tetrodes pentodes
  105. BAT-VK 60 Pls help need repair ;(
  106. Switching on an old amplifier?
  107. elevated filament voltages
  108. Opinnions on Gold Lion KT77
  109. DIY Tube amplifier, Transformer question.
  110. EF42 for audio applications
  111. strange Tungsram tube
  112. Schematics TVA Mentmore M100 M200
  113. A Thordarson amp project
  114. Help: Tubes for my amp
  115. McIntosh mc40 power transformer
  116. Counterpoint SA-1 preamp schematics?
  117. What would a larger OPT get me?
  118. National VP-311C Tubescope help...
  119. 12AU7 - 12.6V DC heater wiring - noob
  120. I bought a box of tubes at an estate sale today
  121. Thermistors to prevent heater current inrush?
  122. can SE bass be as good as PP ?
  123. 2A3 cathode resistor/cap question
  124. class a output ct basic question
  125. Recent popularity of Leak TL-12
  126. bleeder resistor placement w/ power supply choke
  127. cd burner hum w tube stereo
  128. Clipping - Saturation or Mismatching Impedance?
  129. Transformer for K12g tube amp
  130. PowerTrannyHeatRemovalViaHeatSinkRadiatorPassive
  131. "Novel" push pull driver circuit
  132. Feedback lead/lag compensation
  133. help with Signature Technology mono amp
  134. 7591
  135. EL34 integrated amp power loss
  136. Use treble or bass amp for midrange?
  137. Question about a SET 2A3/45
  138. western electric 124 amplifier
  139. el34 power loss in right channel
  140. Ei Silver Plate 12AX7 cathode color ?
  141. Does parafeed really improve sound?
  142. Can I use this choke
  143. Calculating 6922/E88CC/ECC88 cathode follower for 90V anode
  144. ST70 coupling caps eyelet location on PC-3?
  145. Some help with PCL86 Headphone amp Project
  146. Top (sound) quality valve phono stage
  147. Calculating cathode follower using 12AU7 for 90V supply
  148. Cathode resistor
  149. Help with an old Capitol
  150. Cathode bypass cap
  151. balanced post-OT line output?
  152. Blown SE mono, troubleshoot
  153. What is this circuit for?
  154. Siemens EL 86 NOS?
  155. Valve Operational Amplifiers
  156. What will be the best drive to 211 tube?
  157. Dual 845 SE A2 questions
  158. Harman Kardon Citation I, II, & III (Special thanks to Jim McShane and Eli Duttman!)
  159. Heater rewiring from 6N2 to 12AX7 with 6.3VAC
  160. heater bias value
  161. the hum or is it a siliconray kit
  162. DC Automatic Bias Control - Auto fixed bias
  163. What makes an OT a good OT for audiophile and need suggestion.
  164. The totally capless DHT SET amp - 300B or others
  165. Angled Socket brackets?
  166. Octal or loctal tubes as cathode follower?
  167. Used int amp please help to figured out?
  168. Rod Coleman heat sink question
  169. Tubelab SE + Fostex fe206en vs room size! suggestions needed please!
  170. ef86 pentode/triode switch: voltage rating?
  171. Input to pre-amp
  172. EML 300B
  173. Need suggestion in building a stereo power amp
  174. VALVO EL84 and ECC83 TELEFUNKEN ID?
  175. Bogen E-75 tube amp
  176. Quad II amplifier needed for parts
  177. Low voltage 6N1P RIAA?
  178. Does anybody collect vacuum tube ADV
  179. HDMI connection causes hum on Quad 303
  180. ECC81/12AT7 "sweet spot"
  181. Phono Preamp Hum
  182. Benefits of high voltage source for preamp
  183. Auto Bias
  184. Thomas Mayer Sound Processor pics
  185. Have you used the 15A6 pentode as an audio output tube ?
  186. Can I use a 5 volts tap for 6SN7 heaters?
  187. Any opinions about this tube amp kit ?
  188. 300B odd behaviour
  189. Aikido starter help requested
  190. 10Y FILAMENT VOLTAGE MARGIN
  191. Wiring a multitap transformer. Help needed
  192. A directly heated pentode folded cascode
  193. Zener Power Supply Clamp
  194. SPICE Simulator Giving Negative Gain
  195. SE 811 amp schematic...
  196. Philco Labled 12AU7A black-plate 45' halo getter- Raytheon??
  197. My FrankenAmp
  198. Panel Meter Install
  199. New Amp With Hum...
  200. EF184-6j51p Load by CCS or Resitor
  201. Slew rate.. Something doesn't make sense to me.
  202. HK Citation V question
  203. Modifying a tube regulator
  204. 6BG6 Push Pull Parallel Amp Build
  205. adapting a FU32 Tube amp for QQE 03/20 tubes?
  206. audio innovations 500 one channel down?
  207. Questions about found Mullard xf1's
  208. SE 6BL7
  209. Sound Valves M60 schematics needed
  210. el34 class a mod advice please
  211. 12AU7 Genuine or remarked
  212. MIT, Triode amp cathode resistor load line
  213. Marry tube preamplifier with 2-Band Wien bridge equalizer
  214. Oddball tube question
  215. 6H2n-EB Strange Codes??
  216. Triode Dick's KT88 PP Amp.
  217. Curves to EL 502 and EL 300
  218. Input level 1/2 ECC83 + EL84
  219. Cincinatti Mac Amps
  220. ss rectifier filter recommendate
  221. Determining plate current with non-standard screen grid voltages
  222. allnic hpa-5000
  223. Hodgepodge build
  224. Power Transformer weirdness/wiring problem
  225. Question trafo for Broskie Janus PSU
  226. Copland CVA-306 tube and output capacitor replacement
  227. Choice of Output Transformer
  228. Jumping in with both feet
  229. Large 9pin socket needed
  230. Line-up of old and currently produced RIAA Stages with tubes wanted (like EAR-834)
  231. Question about 6P31S
  232. 6N16B Aikido Cathode Resistors
  233. 1KV umbilical cords.... and other HV issues
  234. 300b Bewitch Amp Blows Fuses
  235. Dynaco ST-70
  236. Front-end topologies for PP
  237. tranformers
  238. How many LesBox units exist out there?
  239. Old Sylvania black-plate bent getter 12au7s
  240. Phono / pre amp section schematic suggestions
  241. 4P1L in parallel Single Ended
  242. Pair of Ampex 620 amps
  243. My SE 6S4S
  244. chinese ebay 12au7 + 6dj8 white cathode follower preamp boards?
  245. "chirp" when power up amplifier
  246. Modified Dynaco PAS Phono
  247. Filter Chokes wired for CMR
  248. Capacitors / K12G Tube Amp
  249. Sansui SM-30
  250. RCA Phono Preamplifier with 12ax7

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