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  1. TUBECAD SE.
  2. RH84 build with SS recto and voltage doubler (any input?)
  3. Tube identification
  4. Brand new cap overheating - argh
  5. High Power Valves
  6. Tubelab SSE B+ and cathode resistor questions
  7. HIFI world 6080 se
  8. EF86 triode question
  9. Connecting a Headphone Jack to a Preamp
  10. PSE 300B "French connexion"
  11. Making a custom tube characteristic graph
  12. 300B DRD power supply
  13. Insanely High Common Mode Voltage Shunt Measurement
  14. Heathkit AA-151 troubles
  15. Tube Power supply question...
  16. Noob question on power transformer primary input voltage
  17. Dynaco ST35 testing for a blown power transformer
  18. 6n6p tube buffer
  19. Welborne Labs
  20. GU-50 triode
  21. Help track down noise in gyrator
  22. Earphone Amp Improvements
  23. Protecting Wire
  24. 45 SET : tubelab vs get*set*go vs ?
  25. 6SL7 in Maggy 175 amp...
  26. Heater soft start for series-connected preamp valves
  27. low/no gain follower
  28. Data for 6BD2A or 6BD2
  29. isolation test
  30. Western Electric 437A preamp
  31. solid-state rectrification
  32. Class AB
  33. push-pull
  34. Need help ID tango-lookalike transformers
  35. TV Valves blast from the past..
  36. Tubes suggestions for parafeed headphones amp ?
  37. CCS Loadline
  38. Universal pover supply for ECC85 EL84
  39. Conversion Project
  40. Dynaco PAS I/O PCB Grounding
  41. CCS for anode load
  42. OTL Power Supply: Halfwave vs Virtual Ground
  43. Can NOS tubes have emission staining on the glass?
  44. Pentode pre/compressor (warning nube attempt at circuit drafting) --suppressor grid
  45. Capacitor Drain for Tube Bench Power Supply ?
  46. Diodes, diodes, diodes...
  47. Grid leak resistors and dc-coupling
  48. Output transformer at speaker?
  49. Newbie just wondering if this PP amp looks ok
  50. 6P36S push pull HiFi amp
  51. Another Output Transformer Wiring Question
  52. Cathode bias for EL84 PPP
  53. Output Transformer Wiring Question
  54. NJ7P Tube Database
  55. solving my old radiogram sound issues - help
  56. 6H9c Idle Current.
  57. 12E1 SE amp suggestions.
  58. Direct Coupled Output Stage, DC Bias Balance
  59. Pre-amp tube suggestions for 2A3 output tube
  60. AirTight ATM-1 Schematic
  61. Counterpoint SA 5000 Service manual and PSU
  62. Rectifier tube ? - Berman 76 preamp
  63. Cathode feedback (SE amp)
  64. Will anybody interest in stamp size ccs module?
  65. Fairchild voltage questions
  66. Help with a Sylvania 7695 Project
  67. Flicker Noise dominates triode noise in audio (AES)
  68. A tube for SE with 1k-1k5 load
  69. scott stereomaster 233 restoration
  70. Homebrew Dynaco MkIII Problems - PLEASE HELP!
  71. What to do with C3g tubes
  72. Can anyone ID an output transformer's part number?
  73. Nestorovic NA-1 & Alpha-1 Schematics
  74. Data for 6BD2
  75. Ken Shindo R.I.P
  76. HiFi 6n9p EL34 B + 5z3p Class A Tube valve amplifier
  77. Seas Trym with SE KT88 amplifier?
  78. 845-Amp-IT-Coupled
  79. Data for 6RA3
  80. Miniwatt N3 not turning on!
  81. I need ideas on a can capacitor
  82. Help with tube for power supply...
  83. AVC vs TVC for 10y line preamp
  84. help needed with Lumley 120 monoblocks + Sonus Fabre speakers
  85. help on 845 amp
  86. High voltage power tube question
  87. Tribute OPT for PSE 300B
  88. Floating Paraphase.
  89. 6Q7G as driver in RH807
  90. Custom tubes4hifi m-125 monoblocks
  91. Antique Audio Preamlifier made in USA
  92. directly heated tube rectifiers
  93. Biasing a 12EA6 low voltage pentode
  94. Power supply doubt
  95. Vinyl Savor's Octal 6GL7 preamp?
  96. 837 tube
  97. Tone control bypass (Kontakt KT-7)
  98. drdwers
  99. Amplifier Sensitivity?
  100. identify nickel laminations
  101. Recapping Vintage EL84 amp
  102. opinion on dynaco mark VI
  103. How can i have 450 Volts ?
  104. Balanced Preamp
  105. ecc99-300b
  106. Question about the tube specs/testing?
  107. Transformer Winding Configuration, Hafler 2,815,402
  108. PSU with SS Choke for Loftin-White 2a3.
  109. HP 8903 Pete Millet's Software on Window 8 ?
  110. Cathode Destruction
  111. Earth SuperBass B-2000 bass head info needed
  112. More radio shack dissapointment
  113. What to do with transformer secondary when used as a choke?
  114. Slight transformer buzzing in Engineers Amp
  115. Couple Gyrator Questions
  116. Shishido/Loftin-White 2A3/45 Extasy..
  117. When is a tube not a Valve?
  118. Relay Recommendataion
  119. 6080 monotriod amplifier
  120. Tetra Sans PS Phono Stage Power Supply
  121. transformer test
  122. Could someone tell me more about the Mesa Boogie Strategy 400?
  123. New OTL headphone project with EC88 and 6080
  124. Philips Tube Code
  125. Edcor GXPP vs. CXPP
  126. Shorting or Non-Shorting Rotary Switch: Hi-Low Z tube headphone amp
  127. Marshall Guitar Conversion 12AX7 Replacement
  128. affordable potted power transformer?
  129. Am I pushing the envelope too far? Layout concerns.
  130. Pete Millet's Uniamp
  131. 6211 for???
  132. Picking an output transformer: power vs. sound quality
  133. Tube emulation with transistors
  134. Altec 1570b Tube Swap
  135. Popping stepped attenuator
  136. 6922 driver/cathodyne - direct coupled
  137. Solid state rectifier with these tubes
  138. Need advice -- Improving an old tube amp
  139. KT88 SE developed a buzz
  140. Guidance on amp design
  141. OTL3 Autograph Series
  142. DAC Tube i/v help!
  143. Need help figuring out a tube amp!
  144. Parallel 12AT7 output stage design?
  145. 6SN7 SRPP
  146. Problem Bi-Amping
  147. Amplifier recommendation
  148. DIY tube amplifier got no sound but all tubes are fired up.
  149. Circuit for Melos 333
  150. DHT Tube regulated power supply
  151. Akai M8 Restoration, newbie questions
  152. Bench Power Supply - what to get?
  153. Telefunken RS241 Design Help
  154. Telefunken Hymnus 5328 MX console
  155. Some Dummy DHT Questions
  156. Inductance loading tube stage questions
  157. Simple tube kit for tube sound ?
  158. Voltage Divider with Capacitor Across Resistor to Ground
  159. FM Demodulator for Tube receivers
  160. The best amp to DIY?
  161. SE Tubelab / EL34b tubes / Transformers
  162. Heath Kit Pre Amp
  163. Preamp hiss noise
  164. Tube preamp?
  165. 417a load line
  166. 6N1 + 6P3P build, need some help.
  167. Caps connected in series in Audio Note kit 4
  168. Ground loop cure?
  169. Dynaco ST-70 Clone
  170. Op Amp Phase Splitter
  171. Idea for ECC85 or EM84?
  172. Why no sound?
  173. single ended tube amp sounds itself
  174. Proper Pentode Usage 717A (713A)
  175. Help with Mullard 5 20 project
  176. Help on Negative Feedback in KT66 PP
  177. Trying to understand 6BM8 regulator (audio note clone)
  178. 6AS7 headphone amp with Sophia Electric Mesh plate 274B rec. tube
  179. CR Kalypso Amp with output stage problem- Please help!
  180. "PEAK INPUT SIGNAL GRID-TO-GRID" question.
  181. EZ81 Load
  182. Rectifier question
  183. 6sn7-300b
  184. Balanced tube phono stage
  185. Your favorite 12B4A for a preamp ?
  186. Voltage rating for output coupling caps in 6J1 tube buffer?
  187. Single stage 845 amp
  188. Eagle tube library
  189. Using Choke in Choke Input Power Supply ?
  190. 6550 wrong high bias...
  191. Floating Bridged CCS Loaded P-P Tube Amp
  192. What to do with a problem Counterpoint SA-12
  193. 6Z9P Mu Stage max anode-cathode voltage
  194. Audio Innovations Series 500 parts
  195. Hagerman Trumpet phonostage
  196. PS design...success or failure?
  197. Kuba Serenade Stereo Console - Part III - Replacing all caps
  198. schematic of Knight KP-70 preamp or anyone having this amp?
  199. 6N6P Cathode Follower design value
  200. Radiotron 32W PP amp from RDH3
  201. Heater filament questions
  202. 46 in ultralinear mode
  203. help needed need transformer prim 230/110 sec 300v appr. 20ma +6,3v or 12,6v
  204. Output transformer confusion
  205. need amp schematic help
  206. reviving an old Randall RGT100
  207. lm317 and heater supply.
  208. BJT Voltage Bootstrap - SLCF
  209. Ideas for a cheap 200mA tube rectified PSU
  210. Need help with tube rectifier
  211. Tube or Circuit Noise?
  212. JE Labs (Angela instr.) : your favorite 2A3 schematic ?
  213. Crack the Code Amp build 1000 Watt Tube Amplifier
  214. 12E1 in fixed bias - too much current!
  215. CD-DVD player vs Notebook-usb soundcard sensitivity issue
  216. photo of Knight KP-70 preamplifier for missing component
  217. heater wear sign?
  218. Musical Fidelty X-10D Clone
  219. 815 amp
  220. Jorgen Schou 31,5 OT connection
  221. Is there such a thing....
  222. Tube Rectifiers and Common Grounds
  223. vt4c.com copper tube socket mounts
  224. 1 Ohm Tap Output tranformers?
  225. Voltage Specs For Heaters-Is 2.4V Good Enough?
  226. Aikido with 5842
  227. Luxman MQ70
  228. Valve pre-amp schematic help needed
  229. valves' world - tossie Japan
  230. 211 amp , recognize the circuit?
  231. Tube Preamp: Remedy For Digital Glare?
  232. Tubelab SSE without tube rectifier
  233. Counterpoint 7A
  234. Low Z Out Dual Triode
  235. Push Pull circuit - controlling sensitivity
  236. Moto 3 channel to Maggy 175
  237. PMillett Landfall heatsink
  238. lower the gain
  239. KT88?
  240. Sphinx Project Fourteen help wanted
  241. will this work and looking for suggestions
  242. Squeal on shutdown
  243. Newbie to SRPP and Tubes , 1 question.
  244. Question about interconnect transformers
  245. another toy - el84 PP class A
  246. Problem with biasing - no voltage drop on a cathode resistor
  247. EL84 PP current fluctuating
  248. Aikido Preamp Questions (again)
  249. Amp caused crack
  250. OPT performances

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