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  1. Buzzing decreasing with volume
  2. Fluro Ballast as DIY choke?
  3. 5R4GA ws 5R4WGB
  4. Vintage Webcor Reel to Reel Cap Value Replacement
  5. Coupling Capacitor question
  6. Aikido preamp: 12AU7 or 6CF7/6FQ7 ???
  7. Help needed to identify this Knight Mono Integrated Amp
  8. Winding my own OT
  9. Need a scope screenshot/photo of a Tube clipping
  10. isolating tube sockets
  11. tube cathode bias question: resistor / diode
  12. Silicon Chip mag "Currawong" amp
  13. Vibration spec of 6L6GC ?
  14. Output Transformer Question
  15. 6V6/6l6/EL34/KT66/KT77/6550/KT88 Primaries/ input/loads
  16. Question about HK Citation V schematics
  17. Multi-purpose Tube Preamp - need some help
  18. Vacuum Tube Workshop
  19. Constant Current Heater Source
  20. Tube amp channel loading
  21. Sexy Westra loudspeakers looking for a match
  22. KT90 parallel push pull design
  23. Beard P100 mk1 owners? And some questions.
  24. Hybrid OTL amplifier
  25. heater issue?
  26. negative bias supply
  27. The hardest part about a DIY tube amp is.....
  28. 6N2P-EV driving 6C33
  29. DIY THD Tube Tester / Analyzer
  30. 2.3 watt x 4 or 5 watt x2 SET amplifier using DECWARE Zkit1 and Zkit4 schematics
  31. Cathode follower topology
  32. Line level connected direct to split phase on EL34 PPP?
  33. 13E1 Stereo Single Ended Amp
  34. Apex PA94 Opamp Power Tube Driver
  35. STEM Amplifier Final Pre-Build Checkpoint
  36. thoriated tungsten triodes tetrodes pentodes
  37. BAT-VK 60 Pls help need repair ;(
  38. Switching on an old amplifier?
  39. elevated filament voltages
  40. Opinnions on Gold Lion KT77
  41. DIY Tube amplifier, Transformer question.
  42. Pro reverb AA165 circuit low output from vibrato channel
  43. EF42 for audio applications
  44. strange Tungsram tube
  45. Schematics TVA Mentmore M100 M200
  46. A Thordarson amp project
  47. Help: Tubes for my amp
  48. McIntosh mc40 power transformer
  49. Counterpoint SA-1 preamp schematics?
  50. What would a larger OPT get me?
  51. National VP-311C Tubescope help...
  52. 12AU7 - 12.6V DC heater wiring - noob
  53. I bought a box of tubes at an estate sale today
  54. Thermistors to prevent heater current inrush?
  55. can SE bass be as good as PP ?
  56. 2A3 cathode resistor/cap question
  57. class a output ct basic question
  58. Recent popularity of Leak TL-12
  59. bleeder resistor placement w/ power supply choke
  60. cd burner hum w tube stereo
  61. Clipping - Saturation or Mismatching Impedance?
  62. Transformer for K12g tube amp
  63. PowerTrannyHeatRemovalViaHeatSinkRadiatorPassive
  64. "Novel" push pull driver circuit
  65. Feedback lead/lag compensation
  66. ASC Metal Polypropylene Caps
  67. help with Signature Technology mono amp
  68. 7591
  69. EL34 integrated amp power loss
  70. Use treble or bass amp for midrange?
  71. Question about a SET 2A3/45
  72. western electric 124 amplifier
  73. el34 power loss in right channel
  74. Ei Silver Plate 12AX7 cathode color ?
  75. Does parafeed really improve sound?
  76. Can I use this choke
  77. Calculating 6922/E88CC/ECC88 cathode follower for 90V anode
  78. ST70 coupling caps eyelet location on PC-3?
  79. Some help with PCL86 Headphone amp Project
  80. Top (sound) quality valve phono stage
  81. Calculating cathode follower using 12AU7 for 90V supply
  82. Cathode resistor
  83. Help with an old Capitol
  84. Cathode bypass cap
  85. balanced post-OT line output?
  86. Blown SE mono, troubleshoot
  87. What is this circuit for?
  88. Siemens EL 86 NOS?
  89. Valve Operational Amplifiers
  90. What will be the best drive to 211 tube?
  91. Dual 845 SE A2 questions
  92. Harman Kardon Citation I, II, & III (Special thanks to Jim McShane and Eli Duttman!)
  93. Heater rewiring from 6N2 to 12AX7 with 6.3VAC
  94. heater bias value
  95. the hum or is it a siliconray kit
  96. DC Automatic Bias Control - Auto fixed bias
  97. What makes an OT a good OT for audiophile and need suggestion.
  98. The totally capless DHT SET amp - 300B or others
  99. Angled Socket brackets?
  100. Octal or loctal tubes as cathode follower?
  101. Used int amp please help to figured out?
  102. Rod Coleman heat sink question
  103. Tubelab SE + Fostex fe206en vs room size! suggestions needed please!
  104. ef86 pentode/triode switch: voltage rating?
  105. Input to pre-amp
  106. EML 300B
  107. Need suggestion in building a stereo power amp
  108. VALVO EL84 and ECC83 TELEFUNKEN ID?
  109. Bogen E-75 tube amp
  110. Quad II amplifier needed for parts
  111. Low voltage 6N1P RIAA?
  112. Does anybody collect vacuum tube ADV
  113. HDMI connection causes hum on Quad 303
  114. ECC81/12AT7 "sweet spot"
  115. Phono Preamp Hum
  116. Benefits of high voltage source for preamp
  117. Auto Bias
  118. Thomas Mayer Sound Processor pics
  119. Have you used the 15A6 pentode as an audio output tube ?
  120. Can I use a 5 volts tap for 6SN7 heaters?
  121. Any opinions about this tube amp kit ?
  122. 300B odd behaviour
  123. Aikido starter help requested
  124. 10Y FILAMENT VOLTAGE MARGIN
  125. Wiring a multitap transformer. Help needed
  126. A directly heated pentode folded cascode
  127. Zener Power Supply Clamp
  128. SPICE Simulator Giving Negative Gain
  129. SE 811 amp schematic...
  130. Philco Labled 12AU7A black-plate 45' halo getter- Raytheon??
  131. My FrankenAmp
  132. Panel Meter Install
  133. New Amp With Hum...
  134. EF184-6j51p Load by CCS or Resitor
  135. Slew rate.. Something doesn't make sense to me.
  136. HK Citation V question
  137. Modifying a tube regulator
  138. 6BG6 Push Pull Parallel Amp Build
  139. adapting a FU32 Tube amp for QQE 03/20 tubes?
  140. audio innovations 500 one channel down?
  141. Questions about found Mullard xf1's
  142. SE 6BL7
  143. Sound Valves M60 schematics needed
  144. el34 class a mod advice please
  145. 12AU7 Genuine or remarked
  146. MIT, Triode amp cathode resistor load line
  147. Marry tube preamplifier with 2-Band Wien bridge equalizer
  148. Oddball tube question
  149. Guitar amp screen resistor selection
  150. 6H2n-EB Strange Codes??
  151. Triode Dick's KT88 PP Amp.
  152. Curves to EL 502 and EL 300
  153. Input level 1/2 ECC83 + EL84
  154. SMPS for valve design
  155. Cincinatti Mac Amps
  156. ss rectifier filter recommendate
  157. Determining plate current with non-standard screen grid voltages
  158. allnic hpa-5000
  159. Hodgepodge build
  160. Power Transformer weirdness/wiring problem
  161. Question trafo for Broskie Janus PSU
  162. Copland CVA-306 tube and output capacitor replacement
  163. Choice of Output Transformer
  164. Jumping in with both feet
  165. Large 9pin socket needed
  166. Line-up of old and currently produced RIAA Stages with tubes wanted (like EAR-834)
  167. Question about 6P31S
  168. 6N16B Aikido Cathode Resistors
  169. 1KV umbilical cords.... and other HV issues
  170. 300b Bewitch Amp Blows Fuses
  171. Dynaco ST-70
  172. Front-end topologies for PP
  173. tranformers
  174. How many LesBox units exist out there?
  175. Old Sylvania black-plate bent getter 12au7s
  176. Phono / pre amp section schematic suggestions
  177. 4P1L in parallel Single Ended
  178. Pair of Ampex 620 amps
  179. My SE 6S4S
  180. chinese ebay 12au7 + 6dj8 white cathode follower preamp boards?
  181. "chirp" when power up amplifier
  182. Modified Dynaco PAS Phono
  183. Filter Chokes wired for CMR
  184. Capacitors / K12G Tube Amp
  185. Sansui SM-30
  186. RCA Phono Preamplifier with 12ax7
  187. separate filament transformer for 5u4g?
  188. EL34 Triode strapped amplifier
  189. Testing emission without risk
  190. Anyone Build the Borbely 15W 6C33C SE?
  191. Cheap and upgradable preamp
  192. Source for least expensive tubes.
  193. 5 Pin Tube Socket Suggestions Please
  194. UXCV-11 plates?
  195. Top 5 Most Popular Tube Base
  196. 6C33C and Computer PSU
  197. Output transformer impedance for a 4P1L PSE
  198. Specs of old output transformer
  199. altec 1570b
  200. Mixed tube and ss stages grounding. Best practice?
  201. Any news from Tribute?
  202. What are this....a tube or lamp or etc?
  203. duff tube? Little Bear P1
  204. Opinion on amp build
  205. K12G For Mom & Dad
  206. RIAA Network Position
  207. 6k5GT - Good Tube Curves?
  208. 5902 pentode datasheet confusion
  209. Hum in one channel on Headphone Amp
  210. KT24 datasheet, help !!!
  211. Chicago Standard Transformer Company OPT's
  212. Help on repairing messed up AMC CVT3030
  213. Anyone traced triode curves for the 6CZ5?
  214. anthem pre-1
  215. split supply for tubes
  216. Rufus p. Turner AC-DC amp
  217. 1937 Philco Radio Amp - Build Thread
  218. Transformers for valve headphone amps
  219. Help with negative feedback
  220. Silicon Diode Measurement Confusion
  221. grommet against vibrations
  222. Help with a Moscode 300
  223. Help Identifying Valve Amplifier
  224. capacitors
  225. Questions about console parts salvaging
  226. Regarding EDCOR Transformer Data
  227. PYE mozart
  228. Tube swapping with my Condensor Mic
  229. found amp - identity unknown
  230. how to low the gain
  231. VTL TL-2 tube preamp
  232. Need Advice for Bi-amping
  233. Baldwin organ amp
  234. Octal Aikido with gain/buffer switch?
  235. Harman Kardon Stereo Tube Amp Oscillator Help!
  236. Electro-Harmonex 6973 Question
  237. Power and plate current in a SE amp
  238. 6883B for use as a audio output tube
  239. "Distortionless" Tube Oscillator -Cutting Edge Technology
  240. Feedback RH84 6v6
  241. copper wire from socket bolts to exhaust tip?
  242. What KT88 brands can handle high B+ triode connected?
  243. Williamson-style circuit with Schade feedback using pentode driver stage?
  244. potentiometer for blackface deluxe reverb
  245. GM70 tube copper vs graphite plate???
  246. +/-floating tube PSU for guitar ?! Schematic error ?
  247. About Dark Heater Tubes.
  248. Sylvania 5692 Black base tubes
  249. Tube Tester in Montreal
  250. tubelab.com's super tube SE

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