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  1. Cheap and Cheerful GE 35EH5 SE Amp That Hums
  2. Bench Power Supply Safety
  3. Comments on this preamp?
  4. VoltSecond things that make You say OUCH!
  5. 'Selectron' tubes: From where?
  6. Tony's 6C33 pp amp build progress....
  7. power transformer voltage change
  8. Getting the Urge to Play More
  9. Valve Testing - Help
  10. 10Y/VT-25
  11. GM-70 Socket
  12. Radical Reshape of Magnavox Console Amp
  13. JC Morrison
  14. Daven 3 tube amplifier
  15. ecc82/83 questions
  16. Australian AWV Valve Date Codes
  17. Increasing feedback to Tubelab simple pp
  18. Anyone need a 5U4 ?
  19. Help in identify manufacturer (chicken feet?)
  20. g1 grid stoppers
  21. Lot of tubes needs a new home.....
  22. Differential Bias
  23. British Vacuum Cleaner £ Eng Co Ltd - Goblin
  24. output cap and stepped vol advice. Cary SLP50
  25. Sony TC-500 Gives Its All
  26. Another 211 monobloc
  27. 6N1P-EV Voskhod or Anod manufactured better sounding?
  28. help with long tail pair bandwidth
  29. Anyone have both an Eico HF-81 and Akai M-8?
  30. Sylvania Engineering Sample 12ax7
  31. Between 5AR4/GZ34, 6CH3/6CJ3 and 6D22S anode resistance
  32. One-tube simple amplifier sound experiment
  33. CK1006 ignition voltage?
  34. First build- dual mono octal linestage
  35. schematic for Baldwin 3 chan organ amp
  36. output transformer inquiry.
  37. 807 triode strapped amp - few questions
  38. HV power supply with filament bias
  39. newbie with oldie! (klemt m40 valve amp)
  40. too high voltage supply HELP
  41. 6Y6G Triode Curves
  42. A Tube buffer question from a Tube newbie
  43. Marantz 7c Question - HELP !
  44. Western Electric 555 receiver (Horn Driver)
  45. Getter heater & B+ sequencing ?
  46. Tube Amplifier with 30P1S SE
  47. Little OTL / Class " A "
  48. ATC SEMITEC DIODE, CURRENT REGULATOR
  49. seperate heater transformer advice please
  50. MQ 420-SL OTs
  51. Frequency Response of Williamson Amplifier in LTspice
  52. Edcor transformer upgrade for K12G tube amp?
  53. Transformers placement under PCB
  54. OT PP Hashimoto HW-100-5 tube amp?
  55. Winding an output transformer for headphones ? Some questions
  56. Push Pull OPT Primary Impedance
  57. Tube compliment substitution question. 6gw8 to ?
  58. Watts or Db/watt ?
  59. A question about the OPT Design Assistant software and Impedance matching
  60. XF86
  61. GM70 OTL ???
  62. Output transformer impedance matching
  63. Distortion in 1 channel
  64. HV Electrolytic Caps Question
  65. need to know operating voltage for 6f6 tube amp
  66. The 2A3 build is in dream state
  67. Alembic F2B clone hum & noise
  68. Spice Question
  69. Are large SE amps like 211/845 viable!
  70. Power transformer & heater wiring questions
  71. Parallel KT88 SET Amp
  72. Why people keep talking about using pentodes in triode mode for power amp?
  73. Mono series attenuators vs. PEC for balance control?
  74. TubeTech e813cc Pair for sale on eBay.
  75. Help with new pp kt77
  76. Is 5 Watts enough?
  77. First amp advice for a Newbie
  78. Tube/valve stuff in Tokyo
  79. Advice for a neophyte
  80. EML300B reliability
  81. User's Manual Golden Tube SEP1
  82. DIY to compete with commercial
  83. Ferrite Core vs. Laminations for 2 watt OPT
  84. generating burst waveform in OrCAD® Capture program
  85. O.T. with Litz wire
  86. Valve upgrade T.A.C. 34MK
  87. Another KT88 SE Abdellah with bias issues
  88. Lowering plate dissipation
  89. A helping hand with a diyed 5687 pre, anyone?
  90. Curtis Mathes Royal Dane
  91. Buzzing decreasing with volume
  92. Fluro Ballast as DIY choke?
  93. 5R4GA ws 5R4WGB
  94. Vintage Webcor Reel to Reel Cap Value Replacement
  95. Coupling Capacitor question
  96. Aikido preamp: 12AU7 or 6CF7/6FQ7 ???
  97. Help needed to identify this Knight Mono Integrated Amp
  98. Winding my own OT
  99. Need a scope screenshot/photo of a Tube clipping
  100. isolating tube sockets
  101. tube cathode bias question: resistor / diode
  102. Silicon Chip mag "Currawong" amp
  103. Vibration spec of 6L6GC ?
  104. Output Transformer Question
  105. 6V6/6l6/EL34/KT66/KT77/6550/KT88 Primaries/ input/loads
  106. Question about HK Citation V schematics
  107. Multi-purpose Tube Preamp - need some help
  108. Vacuum Tube Workshop
  109. Constant Current Heater Source
  110. Tube amp channel loading
  111. Sexy Westra loudspeakers looking for a match
  112. KT90 parallel push pull design
  113. Beard P100 mk1 owners? And some questions.
  114. Hybrid OTL amplifier
  115. heater issue?
  116. negative bias supply
  117. The hardest part about a DIY tube amp is.....
  118. 6N2P-EV driving 6C33
  119. DIY THD Tube Tester / Analyzer
  120. 2.3 watt x 4 or 5 watt x2 SET amplifier using DECWARE Zkit1 and Zkit4 schematics
  121. Cathode follower topology
  122. Line level connected direct to split phase on EL34 PPP?
  123. 13E1 Stereo Single Ended Amp
  124. Apex PA94 Opamp Power Tube Driver
  125. STEM Amplifier Final Pre-Build Checkpoint
  126. thoriated tungsten triodes tetrodes pentodes
  127. BAT-VK 60 Pls help need repair ;(
  128. Switching on an old amplifier?
  129. elevated filament voltages
  130. Opinnions on Gold Lion KT77
  131. DIY Tube amplifier, Transformer question.
  132. EF42 for audio applications
  133. strange Tungsram tube
  134. Schematics TVA Mentmore M100 M200
  135. A Thordarson amp project
  136. Help: Tubes for my amp
  137. McIntosh mc40 power transformer
  138. Counterpoint SA-1 preamp schematics?
  139. What would a larger OPT get me?
  140. National VP-311C Tubescope help...
  141. 12AU7 - 12.6V DC heater wiring - noob
  142. I bought a box of tubes at an estate sale today
  143. Thermistors to prevent heater current inrush?
  144. can SE bass be as good as PP ?
  145. 2A3 cathode resistor/cap question
  146. class a output ct basic question
  147. Recent popularity of Leak TL-12
  148. bleeder resistor placement w/ power supply choke
  149. cd burner hum w tube stereo
  150. Clipping - Saturation or Mismatching Impedance?
  151. Transformer for K12g tube amp
  152. PowerTrannyHeatRemovalViaHeatSinkRadiatorPassive
  153. "Novel" push pull driver circuit
  154. Feedback lead/lag compensation
  155. ASC Metal Polypropylene Caps
  156. help with Signature Technology mono amp
  157. 7591
  158. EL34 integrated amp power loss
  159. Use treble or bass amp for midrange?
  160. Question about a SET 2A3/45
  161. western electric 124 amplifier
  162. el34 power loss in right channel
  163. Ei Silver Plate 12AX7 cathode color ?
  164. Does parafeed really improve sound?
  165. Can I use this choke
  166. Calculating 6922/E88CC/ECC88 cathode follower for 90V anode
  167. ST70 coupling caps eyelet location on PC-3?
  168. Some help with PCL86 Headphone amp Project
  169. Top (sound) quality valve phono stage
  170. Calculating cathode follower using 12AU7 for 90V supply
  171. Cathode resistor
  172. Help with an old Capitol
  173. Cathode bypass cap
  174. balanced post-OT line output?
  175. Blown SE mono, troubleshoot
  176. What is this circuit for?
  177. Siemens EL 86 NOS?
  178. Valve Operational Amplifiers
  179. What will be the best drive to 211 tube?
  180. Dual 845 SE A2 questions
  181. Harman Kardon Citation I, II, & III (Special thanks to Jim McShane and Eli Duttman!)
  182. Heater rewiring from 6N2 to 12AX7 with 6.3VAC
  183. heater bias value
  184. the hum or is it a siliconray kit
  185. DC Automatic Bias Control - Auto fixed bias
  186. What makes an OT a good OT for audiophile and need suggestion.
  187. The totally capless DHT SET amp - 300B or others
  188. Angled Socket brackets?
  189. Octal or loctal tubes as cathode follower?
  190. Used int amp please help to figured out?
  191. Rod Coleman heat sink question
  192. Tubelab SE + Fostex fe206en vs room size! suggestions needed please!
  193. ef86 pentode/triode switch: voltage rating?
  194. Input to pre-amp
  195. EML 300B
  196. Need suggestion in building a stereo power amp
  197. VALVO EL84 and ECC83 TELEFUNKEN ID?
  198. Bogen E-75 tube amp
  199. Quad II amplifier needed for parts
  200. Low voltage 6N1P RIAA?
  201. Does anybody collect vacuum tube ADV
  202. HDMI connection causes hum on Quad 303
  203. ECC81/12AT7 "sweet spot"
  204. Phono Preamp Hum
  205. Benefits of high voltage source for preamp
  206. Auto Bias
  207. Thomas Mayer Sound Processor pics
  208. Have you used the 15A6 pentode as an audio output tube ?
  209. Can I use a 5 volts tap for 6SN7 heaters?
  210. Any opinions about this tube amp kit ?
  211. 300B odd behaviour
  212. Aikido starter help requested
  213. 10Y FILAMENT VOLTAGE MARGIN
  214. Wiring a multitap transformer. Help needed
  215. A directly heated pentode folded cascode
  216. Zener Power Supply Clamp
  217. SPICE Simulator Giving Negative Gain
  218. SE 811 amp schematic...
  219. Philco Labled 12AU7A black-plate 45' halo getter- Raytheon??
  220. My FrankenAmp
  221. Panel Meter Install
  222. New Amp With Hum...
  223. EF184-6j51p Load by CCS or Resitor
  224. Slew rate.. Something doesn't make sense to me.
  225. HK Citation V question
  226. Modifying a tube regulator
  227. 6BG6 Push Pull Parallel Amp Build
  228. adapting a FU32 Tube amp for QQE 03/20 tubes?
  229. audio innovations 500 one channel down?
  230. Questions about found Mullard xf1's
  231. SE 6BL7
  232. Sound Valves M60 schematics needed
  233. el34 class a mod advice please
  234. 12AU7 Genuine or remarked
  235. MIT, Triode amp cathode resistor load line
  236. Marry tube preamplifier with 2-Band Wien bridge equalizer
  237. Oddball tube question
  238. 6H2n-EB Strange Codes??
  239. Triode Dick's KT88 PP Amp.
  240. Curves to EL 502 and EL 300
  241. Input level 1/2 ECC83 + EL84
  242. SMPS for valve design
  243. Cincinatti Mac Amps
  244. ss rectifier filter recommendate
  245. Determining plate current with non-standard screen grid voltages
  246. allnic hpa-5000
  247. Hodgepodge build
  248. Power Transformer weirdness/wiring problem
  249. Question trafo for Broskie Janus PSU
  250. Copland CVA-306 tube and output capacitor replacement

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