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  1. Dynaco PAS I/O PCB Grounding
  2. CCS for anode load
  3. OTL Power Supply: Halfwave vs Virtual Ground
  4. Can NOS tubes have emission staining on the glass?
  5. Pentode pre/compressor (warning nube attempt at circuit drafting) --suppressor grid
  6. Capacitor Drain for Tube Bench Power Supply ?
  7. Grid leak resistors and dc-coupling
  8. Output transformer at speaker?
  9. Newbie just wondering if this PP amp looks ok
  10. 6P36S push pull HiFi amp
  11. Another Output Transformer Wiring Question
  12. Cathode bias for EL84 PPP
  13. Output Transformer Wiring Question
  14. NJ7P Tube Database
  15. solving my old radiogram sound issues - help
  16. 6H9c Idle Current.
  17. 12E1 SE amp suggestions.
  18. Direct Coupled Output Stage, DC Bias Balance
  19. Pre-amp tube suggestions for 2A3 output tube
  20. AirTight ATM-1 Schematic
  21. Counterpoint SA 5000 Service manual and PSU
  22. Rectifier tube ? - Berman 76 preamp
  23. Cathode feedback (SE amp)
  24. Will anybody interest in stamp size ccs module?
  25. Fairchild voltage questions
  26. Help with a Sylvania 7695 Project
  27. Flicker Noise dominates triode noise in audio (AES)
  28. A tube for SE with 1k-1k5 load
  29. scott stereomaster 233 restoration
  30. Homebrew Dynaco MkIII Problems - PLEASE HELP!
  31. What to do with C3g tubes
  32. Can anyone ID an output transformer's part number?
  33. Nestorovic NA-1 & Alpha-1 Schematics
  34. Data for 6BD2
  35. Ken Shindo R.I.P
  36. HiFi 6n9p EL34 B + 5z3p Class A Tube valve amplifier
  37. Seas Trym with SE KT88 amplifier?
  38. 845-Amp-IT-Coupled
  39. Data for 6RA3
  40. Miniwatt N3 not turning on!
  41. Help with tube for power supply...
  42. AVC vs TVC for 10y line preamp
  43. help needed with Lumley 120 monoblocks + Sonus Fabre speakers
  44. help on 845 amp
  45. High voltage power tube question
  46. Tribute OPT for PSE 300B
  47. Floating Paraphase.
  48. 6Q7G as driver in RH807
  49. Custom tubes4hifi m-125 monoblocks
  50. Antique Audio Preamlifier made in USA
  51. directly heated tube rectifiers
  52. Biasing a 12EA6 low voltage pentode
  53. Power supply doubt
  54. Vinyl Savor's Octal 6GL7 preamp?
  55. 837 tube
  56. Tone control bypass (Kontakt KT-7)
  57. drdwers
  58. Amplifier Sensitivity?
  59. identify nickel laminations
  60. Recapping Vintage EL84 amp
  61. Luxman Active 3-way Tube Crossover
  62. opinion on dynaco mark VI
  63. How can i have 450 Volts ?
  64. Balanced Preamp
  65. ecc99-300b
  66. Question about the tube specs/testing?
  67. Transformer Winding Configuration, Hafler 2,815,402
  68. PSU with Choke for Loftin-White 2A3
  69. HP 8903 Pete Millet's Software on Window 8 ?
  70. Cathode Destruction
  71. More radio shack dissapointment
  72. What to do with transformer secondary when used as a choke?
  73. Slight transformer buzzing in Engineers Amp
  74. Couple Gyrator Questions
  75. Shishido/Loftin-White 2A3/45 Extasy..
  76. When is a tube not a Valve?
  77. Relay Recommendataion
  78. 6080 SE triode amplifier
  79. Tetra Sans PS Phono Stage Power Supply
  80. transformer test
  81. New OTL headphone project with EC88 and 6080
  82. Philips Tube Code
  83. Edcor GXPP vs. CXPP
  84. Shorting or Non-Shorting Rotary Switch: Hi-Low Z tube headphone amp
  85. affordable potted power transformer?
  86. Am I pushing the envelope too far? Layout concerns.
  87. Pete Millet's Uniamp
  88. 6211 for???
  89. Picking an output transformer: power vs. sound quality
  90. Tube emulation with transistors
  91. Altec 1570b Tube Swap
  92. Popping stepped attenuator
  93. 6922 driver/cathodyne - direct coupled
  94. Solid state rectifier with these tubes
  95. Need advice -- Improving an old tube amp
  96. KT88 SE developed a buzz
  97. Guidance on amp design
  98. OTL3 Autograph Series
  99. DAC Tube i/v help!
  100. Need help figuring out a tube amp!
  101. Parallel 12AT7 output stage design?
  102. 6SN7 SRPP
  103. Problem Bi-Amping
  104. Amplifier recommendation
  105. DIY tube amplifier got no sound but all tubes are fired up.
  106. Circuit for Melos 333
  107. DHT Tube regulated power supply
  108. Akai M8 Restoration, newbie questions
  109. Bench Power Supply - what to get?
  110. Telefunken RS241 Design Help
  111. Telefunken Hymnus 5328 MX console
  112. Some Dummy DHT Questions
  113. Inductance loading tube stage questions
  114. Simple tube kit for tube sound ?
  115. Voltage Divider with Capacitor Across Resistor to Ground
  116. FM Demodulator for Tube receivers
  117. The best amp to DIY?
  118. Heath Kit Pre Amp
  119. Preamp hiss noise
  120. Tube preamp?
  121. 417a load line
  122. 6N1 + 6P3P build, need some help.
  123. Caps connected in series in Audio Note kit 4
  124. Ground loop cure?
  125. Dynaco ST-70 Clone
  126. Op Amp Phase Splitter
  127. Idea for ECC85 or EM84?
  128. Why no sound?
  129. single ended tube amp sounds itself
  130. Proper Pentode Usage 717A (713A)
  131. Help with Mullard 5 20 project
  132. Help on Negative Feedback in KT66 PP
  133. Trying to understand 6BM8 regulator (audio note clone)
  134. 6AS7 headphone amp with Sophia Electric Mesh plate 274B rec. tube
  135. CR Kalypso Amp with output stage problem- Please help!
  136. "PEAK INPUT SIGNAL GRID-TO-GRID" question.
  137. EZ81 Load
  138. Rectifier question
  139. 6sn7-300b
  140. Balanced tube phono stage
  141. Your favorite 12B4A for a preamp ?
  142. Voltage rating for output coupling caps in 6J1 tube buffer?
  143. Single stage 845 amp
  144. Eagle tube library
  145. Using Choke in Choke Input Power Supply ?
  146. 6550 wrong high bias...
  147. Floating Bridged CCS Loaded P-P Tube Amp
  148. What to do with a problem Counterpoint SA-12
  149. 6Z9P Mu Stage max anode-cathode voltage
  150. Audio Innovations Series 500 parts
  151. Hagerman Trumpet phonostage
  152. PS design...success or failure?
  153. Kuba Serenade Stereo Console - Part III - Replacing all caps
  154. schematic of Knight KP-70 preamp or anyone having this amp?
  155. 6N6P Cathode Follower design value
  156. Radiotron 32W PP amp from RDH3
  157. Heater filament questions
  158. 46 in ultralinear mode
  159. help needed need transformer prim 230/110 sec 300v appr. 20ma +6,3v or 12,6v
  160. Output transformer confusion
  161. need amp schematic help
  162. lm317 and heater supply.
  163. BJT Voltage Bootstrap - SLCF
  164. Ideas for a cheap 200mA tube rectified PSU
  165. Need help with tube rectifier
  166. Tube or Circuit Noise?
  167. JE Labs (Angela instr.) : your favorite 2A3 schematic ?
  168. Crack the Code Amp build 1000 Watt Tube Amplifier
  169. 12E1 in fixed bias - too much current!
  170. CD-DVD player vs Notebook-usb soundcard sensitivity issue
  171. photo of Knight KP-70 preamplifier for missing component
  172. heater wear sign?
  173. Musical Fidelty X-10D Clone
  174. 815 amp
  175. Jorgen Schou 31,5 OT connection
  176. Is there such a thing....
  177. Tube Rectifiers and Common Grounds
  178. vt4c.com copper tube socket mounts
  179. 1 Ohm Tap Output tranformers?
  180. Voltage Specs For Heaters-Is 2.4V Good Enough?
  181. Aikido with 5842
  182. Luxman MQ70
  183. Valve pre-amp schematic help needed
  184. valves' world - tossie Japan
  185. 211 amp , recognize the circuit?
  186. Tube Preamp: Remedy For Digital Glare?
  187. Counterpoint 7A
  188. Low Z Out Dual Triode
  189. Push Pull circuit - controlling sensitivity
  190. Moto 3 channel to Maggy 175
  191. PMillett Landfall heatsink
  192. lower the gain
  193. KT88?
  194. Sphinx Project Fourteen help wanted
  195. will this work and looking for suggestions
  196. Squeal on shutdown
  197. Newbie to SRPP and Tubes , 1 question.
  198. Question about interconnect transformers
  199. another toy - el84 PP class A
  200. Problem with biasing - no voltage drop on a cathode resistor
  201. EL84 PP current fluctuating
  202. Aikido Preamp Questions (again)
  203. Amp caused crack
  204. OPT performances
  205. Hammond 125ESE in 2A3 SE : better substitutions ?
  206. Headphone Impedance and headphone amplifier
  207. Could this tube be good for audio ?
  208. Output Transformer for SE / headphone amp
  209. pioneer sm-b200a
  210. 12AT7 Tubes ?
  211. Gold Lion kt77 bias help?
  212. Need some bias control help
  213. Lafayette LA-224a/b modernization?
  214. Need help completing vintage 6L6 amp
  215. Direct Russian equivilent for 5687, is there one ?
  216. Attenuation for 0.5dBs
  217. Dynaco ST-120 Impedance Concern Martin Logan
  218. Some 1626 Darling Amp Questions
  219. Choosing a SE 2A3 shematic : hum as a criteria...
  220. Rectifier question, voltage across diode.
  221. Angela simple 2A3
  222. Cathode follower - resistor calculations/software
  223. Desperately Seeking OPT Covers
  224. Modified Tube Cricket Amp Questions
  225. Best sounding DIY amp kits for 45, 2A3 or 300B
  226. Pentode's screen voltage/current
  227. KT88 Cathode Current Runaway/Oscillations?
  228. O'netics, Electra Print: anyone have both?
  229. How to maximize power transfer in tube circuit designs, damping is not the question!
  230. Inexpensive 2.5k primary SET OPT with 90mA+ DC bias rating?
  231. 4p1L Ultralinear
  232. RH300B 12W with 1% THD
  233. This is where the adventure begins
  234. 12AU7 pre rebuild suggestions
  235. Subwoofer Channel on Tube Amp
  236. Changing input tube from 12ax7 to 6AU6A on OTL project
  237. Yaqin MC5881a
  238. Humming Sound from tube amp
  239. Level Five 2A3 SE schematic : opinions ?
  240. My screwup = free PCBs...
  241. New stuff on the website: A2 buffer, isolated current sensor
  242. 12.6vDC Heaters, looking for a shortcut
  243. Fisher 80-AZ bias milliamps?
  244. Can shed some light on this EL 34 schematic diagram
  245. Solid State Rectifier in Dynaco Tube Amp
  246. Big chassis designs!
  247. 12ax7 LP
  248. plitron output w/ cfb usage ideas
  249. 390 ohm should have been 390k ohm
  250. Advice sought re what tube power amp

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