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  1. HiFi 6n9p EL34 B + 5z3p Class A Tube valve amplifier
  2. Seas Trym with SE KT88 amplifier?
  3. 845-Amp-IT-Coupled
  4. Data for 6RA3
  5. Miniwatt N3 not turning on!
  6. I need ideas on a can capacitor
  7. Help with tube for power supply...
  8. AVC vs TVC for 10y line preamp
  9. help needed with Lumley 120 monoblocks + Sonus Fabre speakers
  10. help on 845 amp
  11. High voltage power tube question
  12. Tribute OPT for PSE 300B
  13. Floating Paraphase.
  14. 6Q7G as driver in RH807
  15. Custom tubes4hifi m-125 monoblocks
  16. Antique Audio Preamlifier made in USA
  17. directly heated tube rectifiers
  18. Biasing a 12EA6 low voltage pentode
  19. Power supply doubt
  20. Vinyl Savor's Octal 6GL7 preamp?
  21. 837 tube
  22. Tone control bypass (Kontakt KT-7)
  23. drdwers
  24. Amplifier Sensitivity?
  25. identify nickel laminations
  26. Recapping Vintage EL84 amp
  27. opinion on dynaco mark VI
  28. How can i have 450 Volts ?
  29. Balanced Preamp
  30. ecc99-300b
  31. Question about the tube specs/testing?
  32. Transformer Winding Configuration, Hafler 2,815,402
  33. PSU with SS Choke for Loftin-White 2a3.
  34. HP 8903 Pete Millet's Software on Window 8 ?
  35. Cathode Destruction
  36. Earth SuperBass B-2000 bass head info needed
  37. More radio shack dissapointment
  38. What to do with transformer secondary when used as a choke?
  39. Slight transformer buzzing in Engineers Amp
  40. Couple Gyrator Questions
  41. Shishido/Loftin-White 2A3/45 Extasy..
  42. When is a tube not a Valve?
  43. Relay Recommendataion
  44. 6080 monotriod amplifier
  45. Tetra Sans PS Phono Stage Power Supply
  46. transformer test
  47. Could someone tell me more about the Mesa Boogie Strategy 400?
  48. New OTL headphone project with EC88 and 6080
  49. Philips Tube Code
  50. Edcor GXPP vs. CXPP
  51. Shorting or Non-Shorting Rotary Switch: Hi-Low Z tube headphone amp
  52. Marshall Guitar Conversion 12AX7 Replacement
  53. affordable potted power transformer?
  54. Am I pushing the envelope too far? Layout concerns.
  55. Pete Millet's Uniamp
  56. 6211 for???
  57. Picking an output transformer: power vs. sound quality
  58. Tube emulation with transistors
  59. Altec 1570b Tube Swap
  60. Popping stepped attenuator
  61. 6922 driver/cathodyne - direct coupled
  62. Solid state rectifier with these tubes
  63. Need advice -- Improving an old tube amp
  64. KT88 SE developed a buzz
  65. Guidance on amp design
  66. OTL3 Autograph Series
  67. DAC Tube i/v help!
  68. Need help figuring out a tube amp!
  69. Parallel 12AT7 output stage design?
  70. 6SN7 SRPP
  71. Problem Bi-Amping
  72. Amplifier recommendation
  73. DIY tube amplifier got no sound but all tubes are fired up.
  74. Circuit for Melos 333
  75. DHT Tube regulated power supply
  76. Akai M8 Restoration, newbie questions
  77. Bench Power Supply - what to get?
  78. Telefunken RS241 Design Help
  79. Telefunken Hymnus 5328 MX console
  80. Some Dummy DHT Questions
  81. Inductance loading tube stage questions
  82. Simple tube kit for tube sound ?
  83. Voltage Divider with Capacitor Across Resistor to Ground
  84. FM Demodulator for Tube receivers
  85. The best amp to DIY?
  86. SE Tubelab / EL34b tubes / Transformers
  87. Heath Kit Pre Amp
  88. Preamp hiss noise
  89. Tube preamp?
  90. 417a load line
  91. 6N1 + 6P3P build, need some help.
  92. Caps connected in series in Audio Note kit 4
  93. Ground loop cure?
  94. Dynaco ST-70 Clone
  95. Op Amp Phase Splitter
  96. Idea for ECC85 or EM84?
  97. Why no sound?
  98. single ended tube amp sounds itself
  99. Proper Pentode Usage 717A (713A)
  100. Help with Mullard 5 20 project
  101. Help on Negative Feedback in KT66 PP
  102. Trying to understand 6BM8 regulator (audio note clone)
  103. 6AS7 headphone amp with Sophia Electric Mesh plate 274B rec. tube
  104. CR Kalypso Amp with output stage problem- Please help!
  105. "PEAK INPUT SIGNAL GRID-TO-GRID" question.
  106. EZ81 Load
  107. Rectifier question
  108. 6sn7-300b
  109. Balanced tube phono stage
  110. Your favorite 12B4A for a preamp ?
  111. Voltage rating for output coupling caps in 6J1 tube buffer?
  112. Single stage 845 amp
  113. Eagle tube library
  114. Using Choke in Choke Input Power Supply ?
  115. 6550 wrong high bias...
  116. Floating Bridged CCS Loaded P-P Tube Amp
  117. What to do with a problem Counterpoint SA-12
  118. 6Z9P Mu Stage max anode-cathode voltage
  119. Audio Innovations Series 500 parts
  120. Hagerman Trumpet phonostage
  121. PS design...success or failure?
  122. Kuba Serenade Stereo Console - Part III - Replacing all caps
  123. schematic of Knight KP-70 preamp or anyone having this amp?
  124. 6N6P Cathode Follower design value
  125. Radiotron 32W PP amp from RDH3
  126. Heater filament questions
  127. 46 in ultralinear mode
  128. help needed need transformer prim 230/110 sec 300v appr. 20ma +6,3v or 12,6v
  129. Output transformer confusion
  130. need amp schematic help
  131. reviving an old Randall RGT100
  132. lm317 and heater supply.
  133. BJT Voltage Bootstrap - SLCF
  134. Ideas for a cheap 200mA tube rectified PSU
  135. Need help with tube rectifier
  136. Tube or Circuit Noise?
  137. JE Labs (Angela instr.) : your favorite 2A3 schematic ?
  138. Crack the Code Amp build 1000 Watt Tube Amplifier
  139. 12E1 in fixed bias - too much current!
  140. CD-DVD player vs Notebook-usb soundcard sensitivity issue
  141. photo of Knight KP-70 preamplifier for missing component
  142. heater wear sign?
  143. Musical Fidelty X-10D Clone
  144. 815 amp
  145. Jorgen Schou 31,5 OT connection
  146. Is there such a thing....
  147. Tube Rectifiers and Common Grounds
  148. vt4c.com copper tube socket mounts
  149. 1 Ohm Tap Output tranformers?
  150. Voltage Specs For Heaters-Is 2.4V Good Enough?
  151. Aikido with 5842
  152. Luxman MQ70
  153. Valve pre-amp schematic help needed
  154. valves' world - tossie Japan
  155. 211 amp , recognize the circuit?
  156. Tube Preamp: Remedy For Digital Glare?
  157. Tubelab SSE without tube rectifier
  158. Counterpoint 7A
  159. Low Z Out Dual Triode
  160. Push Pull circuit - controlling sensitivity
  161. Moto 3 channel to Maggy 175
  162. PMillett Landfall heatsink
  163. lower the gain
  164. KT88?
  165. Sphinx Project Fourteen help wanted
  166. will this work and looking for suggestions
  167. Squeal on shutdown
  168. Newbie to SRPP and Tubes , 1 question.
  169. Question about interconnect transformers
  170. another toy - el84 PP class A
  171. Problem with biasing - no voltage drop on a cathode resistor
  172. EL84 PP current fluctuating
  173. Aikido Preamp Questions (again)
  174. Amp caused crack
  175. OPT performances
  176. Hammond 125ESE in 2A3 SE : better substitutions ?
  177. Headphone Impedance and headphone amplifier
  178. Could this tube be good for audio ?
  179. Output Transformer for SE / headphone amp
  180. pioneer sm-b200a
  181. 12AT7 Tubes ?
  182. Gold Lion kt77 bias help?
  183. Need some bias control help
  184. Lafayette LA-224a/b modernization?
  185. Need help completing vintage 6L6 amp
  186. Direct Russian equivilent for 5687, is there one ?
  187. Attenuation for 0.5dBs
  188. Dynaco ST-120 Impedance Concern Martin Logan
  189. Some 1626 Darling Amp Questions
  190. Choosing a SE 2A3 shematic : hum as a criteria...
  191. Rectifier question, voltage across diode.
  192. Angela simple 2A3
  193. Cathode follower - resistor calculations/software
  194. Desperately Seeking OPT Covers
  195. Modified Tube Cricket Amp Questions
  196. Best sounding DIY amp kits for 45, 2A3 or 300B
  197. Pentode's screen voltage/current
  198. KT88 Cathode Current Runaway/Oscillations?
  199. O'netics, Electra Print: anyone have both?
  200. How to maximize power transfer in tube circuit designs, damping is not the question!
  201. Inexpensive 2.5k primary SET OPT with 90mA+ DC bias rating?
  202. 4p1L Ultralinear
  203. RH300B 12W with 1% THD
  204. This is where the adventure begins
  205. 12AU7 pre rebuild suggestions
  206. Subwoofer Channel on Tube Amp
  207. Changing input tube from 12ax7 to 6AU6A on OTL project
  208. Yaqin MC5881a
  209. Humming Sound from tube amp
  210. Level Five 2A3 SE schematic : opinions ?
  211. My screwup = free PCBs...
  212. New stuff on the website: A2 buffer, isolated current sensor
  213. 12.6vDC Heaters, looking for a shortcut
  214. Fisher 80-AZ bias milliamps?
  215. Can shed some light on this EL 34 schematic diagram
  216. Solid State Rectifier in Dynaco Tube Amp
  217. Big chassis designs!
  218. 12ax7 LP
  219. plitron output w/ cfb usage ideas
  220. 390 ohm should have been 390k ohm
  221. Advice sought re what tube power amp
  222. EL34 SED Winged C Black Prints: original??
  223. OPTx from Ogonowski
  224. Aikido cathode follower (ACF) with 12au7
  225. Ampeg vt60 tri ax (did it really exist?)
  226. SEP EL-34 to 6L6GC?
  227. Volume Pot Spec
  228. My Tube Pre-Amp Picking up an AM radio station?
  229. Philips 6SN7 GTA & GTB
  230. ST-120 Problem With Rectifier Tube
  231. New Yaqin VK-2100
  232. Electronic parts and sub-zero temperature
  233. Bendix 6384 as EL34: Experience anyone?
  234. Audioresearch LS2B schematic needed
  235. input noise - too simple - but need explaination
  236. Plate voltage with/without tube (for fine tune bias adjustemnt)
  237. Using trimmers / potentiometers to adjust tube operating points
  238. KT88 SED winged C tolerance tall for quad
  239. Power Transformer Tolerances
  240. 12E1 Ultra Linear
  241. Comparison KT150 versus KT120
  242. 6sn7: GT GTA GTB sono differences for HIFI
  243. Audio Research LS5 Power Supply Problem
  244. Vintage grundig vs. new Yaqin. Advice?
  245. 5AR4 PSU
  246. What tube is this ?
  247. Need Schematic
  248. Budget PP Iron: Transcendar or Edcor?
  249. Yaqin MC-10L buzz
  250. Transformer buzzing when filament section is loaded

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