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  1. Which tube preamplifier kit for LM3886 amplifier?
  2. budgie pre-amp
  3. ecl82 class A pp, need schematic
  4. Input low pass preferred method
  5. cary SLP50A
  6. se output options for single/balanced tda1541
  7. FM noise in Fisher 90-T in FM mode
  8. ST Triodes?
  9. TUBECAD SE.
  10. RH84 build with SS recto and voltage doubler (any input?)
  11. Tube identification
  12. Brand new cap overheating - argh
  13. High Power Valves
  14. Tubelab SSE B+ and cathode resistor questions
  15. HIFI world 6080 se
  16. EF86 triode question
  17. Connecting a Headphone Jack to a Preamp
  18. PSE 300B "French connexion"
  19. Making a custom tube characteristic graph
  20. 300B DRD power supply
  21. Insanely High Common Mode Voltage Shunt Measurement
  22. Heathkit AA-151 troubles
  23. Tube Power supply question...
  24. Noob question on power transformer primary input voltage
  25. Dynaco ST35 testing for a blown power transformer
  26. 6n6p tube buffer
  27. Welborne Labs
  28. GU-50 triode
  29. Help track down noise in gyrator
  30. Earphone Amp Improvements
  31. Protecting Wire
  32. 45 SET : tubelab vs get*set*go vs ?
  33. 6SL7 in Maggy 175 amp...
  34. Heater soft start for series-connected preamp valves
  35. low/no gain follower
  36. Data for 6BD2A or 6BD2
  37. isolation test
  38. Western Electric 437A preamp
  39. solid-state rectrification
  40. Class AB
  41. push-pull
  42. Need help ID tango-lookalike transformers
  43. TV Valves blast from the past..
  44. Tubes suggestions for parafeed headphones amp ?
  45. CCS Loadline
  46. Universal pover supply for ECC85 EL84
  47. Conversion Project
  48. Dynaco PAS I/O PCB Grounding
  49. CCS for anode load
  50. OTL Power Supply: Halfwave vs Virtual Ground
  51. Can NOS tubes have emission staining on the glass?
  52. Pentode pre/compressor (warning nube attempt at circuit drafting) --suppressor grid
  53. Capacitor Drain for Tube Bench Power Supply ?
  54. Diodes, diodes, diodes...
  55. Grid leak resistors and dc-coupling
  56. Output transformer at speaker?
  57. Newbie just wondering if this PP amp looks ok
  58. 6P36S push pull HiFi amp
  59. Another Output Transformer Wiring Question
  60. Cathode bias for EL84 PPP
  61. Output Transformer Wiring Question
  62. NJ7P Tube Database
  63. solving my old radiogram sound issues - help
  64. 6H9c Idle Current.
  65. 12E1 SE amp suggestions.
  66. Direct Coupled Output Stage, DC Bias Balance
  67. Pre-amp tube suggestions for 2A3 output tube
  68. AirTight ATM-1 Schematic
  69. Counterpoint SA 5000 Service manual and PSU
  70. Rectifier tube ? - Berman 76 preamp
  71. Cathode feedback (SE amp)
  72. Will anybody interest in stamp size ccs module?
  73. Fairchild voltage questions
  74. Help with a Sylvania 7695 Project
  75. Flicker Noise dominates triode noise in audio (AES)
  76. A tube for SE with 1k-1k5 load
  77. scott stereomaster 233 restoration
  78. Homebrew Dynaco MkIII Problems - PLEASE HELP!
  79. What to do with C3g tubes
  80. Can anyone ID an output transformer's part number?
  81. Nestorovic NA-1 & Alpha-1 Schematics
  82. Data for 6BD2
  83. Ken Shindo R.I.P
  84. HiFi 6n9p EL34 B + 5z3p Class A Tube valve amplifier
  85. Seas Trym with SE KT88 amplifier?
  86. 845-Amp-IT-Coupled
  87. Data for 6RA3
  88. Miniwatt N3 not turning on!
  89. I need ideas on a can capacitor
  90. Help with tube for power supply...
  91. AVC vs TVC for 10y line preamp
  92. help needed with Lumley 120 monoblocks + Sonus Fabre speakers
  93. help on 845 amp
  94. High voltage power tube question
  95. Tribute OPT for PSE 300B
  96. Floating Paraphase.
  97. 6Q7G as driver in RH807
  98. Custom tubes4hifi m-125 monoblocks
  99. Antique Audio Preamlifier made in USA
  100. directly heated tube rectifiers
  101. Biasing a 12EA6 low voltage pentode
  102. Power supply doubt
  103. Vinyl Savor's Octal 6GL7 preamp?
  104. 837 tube
  105. Tone control bypass (Kontakt KT-7)
  106. drdwers
  107. Amplifier Sensitivity?
  108. identify nickel laminations
  109. Recapping Vintage EL84 amp
  110. opinion on dynaco mark VI
  111. How can i have 450 Volts ?
  112. Balanced Preamp
  113. ecc99-300b
  114. Question about the tube specs/testing?
  115. Transformer Winding Configuration, Hafler 2,815,402
  116. PSU with SS Choke for Loftin-White 2a3.
  117. HP 8903 Pete Millet's Software on Window 8 ?
  118. Cathode Destruction
  119. Earth SuperBass B-2000 bass head info needed
  120. More radio shack dissapointment
  121. What to do with transformer secondary when used as a choke?
  122. Slight transformer buzzing in Engineers Amp
  123. Couple Gyrator Questions
  124. Shishido/Loftin-White 2A3/45 Extasy..
  125. When is a tube not a Valve?
  126. Relay Recommendataion
  127. 6080 monotriod amplifier
  128. Tetra Sans PS Phono Stage Power Supply
  129. transformer test
  130. Could someone tell me more about the Mesa Boogie Strategy 400?
  131. New OTL headphone project with EC88 and 6080
  132. Philips Tube Code
  133. Edcor GXPP vs. CXPP
  134. Shorting or Non-Shorting Rotary Switch: Hi-Low Z tube headphone amp
  135. Marshall Guitar Conversion 12AX7 Replacement
  136. affordable potted power transformer?
  137. Am I pushing the envelope too far? Layout concerns.
  138. Pete Millet's Uniamp
  139. 6211 for???
  140. Picking an output transformer: power vs. sound quality
  141. Tube emulation with transistors
  142. Altec 1570b Tube Swap
  143. Popping stepped attenuator
  144. 6922 driver/cathodyne - direct coupled
  145. Solid state rectifier with these tubes
  146. Need advice -- Improving an old tube amp
  147. KT88 SE developed a buzz
  148. Guidance on amp design
  149. OTL3 Autograph Series
  150. DAC Tube i/v help!
  151. Need help figuring out a tube amp!
  152. Parallel 12AT7 output stage design?
  153. 6SN7 SRPP
  154. Problem Bi-Amping
  155. Amplifier recommendation
  156. DIY tube amplifier got no sound but all tubes are fired up.
  157. Circuit for Melos 333
  158. DHT Tube regulated power supply
  159. Akai M8 Restoration, newbie questions
  160. Bench Power Supply - what to get?
  161. Telefunken RS241 Design Help
  162. Telefunken Hymnus 5328 MX console
  163. Some Dummy DHT Questions
  164. Inductance loading tube stage questions
  165. Simple tube kit for tube sound ?
  166. Voltage Divider with Capacitor Across Resistor to Ground
  167. FM Demodulator for Tube receivers
  168. The best amp to DIY?
  169. SE Tubelab / EL34b tubes / Transformers
  170. Heath Kit Pre Amp
  171. Preamp hiss noise
  172. Tube preamp?
  173. 417a load line
  174. 6N1 + 6P3P build, need some help.
  175. Caps connected in series in Audio Note kit 4
  176. Ground loop cure?
  177. Dynaco ST-70 Clone
  178. Op Amp Phase Splitter
  179. Idea for ECC85 or EM84?
  180. Why no sound?
  181. single ended tube amp sounds itself
  182. Proper Pentode Usage 717A (713A)
  183. Help with Mullard 5 20 project
  184. Help on Negative Feedback in KT66 PP
  185. Trying to understand 6BM8 regulator (audio note clone)
  186. 6AS7 headphone amp with Sophia Electric Mesh plate 274B rec. tube
  187. CR Kalypso Amp with output stage problem- Please help!
  188. "PEAK INPUT SIGNAL GRID-TO-GRID" question.
  189. EZ81 Load
  190. Rectifier question
  191. 6sn7-300b
  192. Balanced tube phono stage
  193. Your favorite 12B4A for a preamp ?
  194. Voltage rating for output coupling caps in 6J1 tube buffer?
  195. Single stage 845 amp
  196. Eagle tube library
  197. Using Choke in Choke Input Power Supply ?
  198. 6550 wrong high bias...
  199. Floating Bridged CCS Loaded P-P Tube Amp
  200. What to do with a problem Counterpoint SA-12
  201. 6Z9P Mu Stage max anode-cathode voltage
  202. Audio Innovations Series 500 parts
  203. Hagerman Trumpet phonostage
  204. PS design...success or failure?
  205. Kuba Serenade Stereo Console - Part III - Replacing all caps
  206. schematic of Knight KP-70 preamp or anyone having this amp?
  207. 6N6P Cathode Follower design value
  208. Radiotron 32W PP amp from RDH3
  209. Heater filament questions
  210. 46 in ultralinear mode
  211. help needed need transformer prim 230/110 sec 300v appr. 20ma +6,3v or 12,6v
  212. Output transformer confusion
  213. need amp schematic help
  214. reviving an old Randall RGT100
  215. lm317 and heater supply.
  216. BJT Voltage Bootstrap - SLCF
  217. Ideas for a cheap 200mA tube rectified PSU
  218. Need help with tube rectifier
  219. Tube or Circuit Noise?
  220. JE Labs (Angela instr.) : your favorite 2A3 schematic ?
  221. Crack the Code Amp build 1000 Watt Tube Amplifier
  222. 12E1 in fixed bias - too much current!
  223. CD-DVD player vs Notebook-usb soundcard sensitivity issue
  224. photo of Knight KP-70 preamplifier for missing component
  225. heater wear sign?
  226. Musical Fidelty X-10D Clone
  227. 815 amp
  228. Jorgen Schou 31,5 OT connection
  229. Is there such a thing....
  230. Tube Rectifiers and Common Grounds
  231. vt4c.com copper tube socket mounts
  232. 1 Ohm Tap Output tranformers?
  233. Voltage Specs For Heaters-Is 2.4V Good Enough?
  234. Aikido with 5842
  235. Luxman MQ70
  236. Valve pre-amp schematic help needed
  237. valves' world - tossie Japan
  238. 211 amp , recognize the circuit?
  239. Tube Preamp: Remedy For Digital Glare?
  240. Tubelab SSE without tube rectifier
  241. Counterpoint 7A
  242. Low Z Out Dual Triode
  243. Push Pull circuit - controlling sensitivity
  244. Moto 3 channel to Maggy 175
  245. PMillett Landfall heatsink
  246. lower the gain
  247. KT88?
  248. Sphinx Project Fourteen help wanted
  249. will this work and looking for suggestions
  250. Squeal on shutdown

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