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