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  1. help on 845 amp
  2. High voltage power tube question
  3. Tribute OPT for PSE 300B
  4. Floating Paraphase.
  5. 6Q7G as driver in RH807
  6. Custom tubes4hifi m-125 monoblocks
  7. Antique Audio Preamlifier made in USA
  8. directly heated tube rectifiers
  9. Biasing a 12EA6 low voltage pentode
  10. Power supply doubt
  11. Vinyl Savor's Octal 6GL7 preamp?
  12. 837 tube
  13. Tone control bypass (Kontakt KT-7)
  14. drdwers
  15. Amplifier Sensitivity?
  16. identify nickel laminations
  17. Recapping Vintage EL84 amp
  18. opinion on dynaco mark VI
  19. How can i have 450 Volts ?
  20. Balanced Preamp
  21. ecc99-300b
  22. Question about the tube specs/testing?
  23. Transformer Winding Configuration, Hafler 2,815,402
  24. PSU with SS Choke for Loftin-White 2a3.
  25. HP 8903 Pete Millet's Software on Window 8 ?
  26. Cathode Destruction
  27. Earth SuperBass B-2000 bass head info needed
  28. More radio shack dissapointment
  29. What to do with transformer secondary when used as a choke?
  30. Slight transformer buzzing in Engineers Amp
  31. Couple Gyrator Questions
  32. Shishido/Loftin-White 2A3/45 Extasy..
  33. When is a tube not a Valve?
  34. Relay Recommendataion
  35. 6080 monotriod amplifier
  36. Tetra Sans PS Phono Stage Power Supply
  37. transformer test
  38. Could someone tell me more about the Mesa Boogie Strategy 400?
  39. New OTL headphone project with EC88 and 6080
  40. Philips Tube Code
  41. Edcor GXPP vs. CXPP
  42. Shorting or Non-Shorting Rotary Switch: Hi-Low Z tube headphone amp
  43. Marshall Guitar Conversion 12AX7 Replacement
  44. affordable potted power transformer?
  45. Am I pushing the envelope too far? Layout concerns.
  46. Pete Millet's Uniamp
  47. 6211 for???
  48. Picking an output transformer: power vs. sound quality
  49. Tube emulation with transistors
  50. Altec 1570b Tube Swap
  51. Popping stepped attenuator
  52. 6922 driver/cathodyne - direct coupled
  53. Solid state rectifier with these tubes
  54. Need advice -- Improving an old tube amp
  55. KT88 SE developed a buzz
  56. Guidance on amp design
  57. OTL3 Autograph Series
  58. DAC Tube i/v help!
  59. Need help figuring out a tube amp!
  60. Parallel 12AT7 output stage design?
  61. 6SN7 SRPP
  62. Problem Bi-Amping
  63. Amplifier recommendation
  64. DIY tube amplifier got no sound but all tubes are fired up.
  65. Circuit for Melos 333
  66. DHT Tube regulated power supply
  67. Akai M8 Restoration, newbie questions
  68. Bench Power Supply - what to get?
  69. Telefunken RS241 Design Help
  70. Telefunken Hymnus 5328 MX console
  71. Some Dummy DHT Questions
  72. Inductance loading tube stage questions
  73. Simple tube kit for tube sound ?
  74. Voltage Divider with Capacitor Across Resistor to Ground
  75. FM Demodulator for Tube receivers
  76. The best amp to DIY?
  77. SE Tubelab / EL34b tubes / Transformers
  78. Heath Kit Pre Amp
  79. Preamp hiss noise
  80. Tube preamp?
  81. 417a load line
  82. 6N1 + 6P3P build, need some help.
  83. Caps connected in series in Audio Note kit 4
  84. Ground loop cure?
  85. Dynaco ST-70 Clone
  86. Op Amp Phase Splitter
  87. Idea for ECC85 or EM84?
  88. Why no sound?
  89. single ended tube amp sounds itself
  90. Proper Pentode Usage 717A (713A)
  91. Help with Mullard 5 20 project
  92. Help on Negative Feedback in KT66 PP
  93. Trying to understand 6BM8 regulator (audio note clone)
  94. 6AS7 headphone amp with Sophia Electric Mesh plate 274B rec. tube
  95. CR Kalypso Amp with output stage problem- Please help!
  96. "PEAK INPUT SIGNAL GRID-TO-GRID" question.
  97. EZ81 Load
  98. Rectifier question
  99. 6sn7-300b
  100. Balanced tube phono stage
  101. Your favorite 12B4A for a preamp ?
  102. Voltage rating for output coupling caps in 6J1 tube buffer?
  103. Single stage 845 amp
  104. Eagle tube library
  105. Using Choke in Choke Input Power Supply ?
  106. 6550 wrong high bias...
  107. Floating Bridged CCS Loaded P-P Tube Amp
  108. What to do with a problem Counterpoint SA-12
  109. 6Z9P Mu Stage max anode-cathode voltage
  110. Audio Innovations Series 500 parts
  111. Hagerman Trumpet phonostage
  112. PS design...success or failure?
  113. Kuba Serenade Stereo Console - Part III - Replacing all caps
  114. schematic of Knight KP-70 preamp or anyone having this amp?
  115. 6N6P Cathode Follower design value
  116. Radiotron 32W PP amp from RDH3
  117. Heater filament questions
  118. 46 in ultralinear mode
  119. help needed need transformer prim 230/110 sec 300v appr. 20ma +6,3v or 12,6v
  120. Output transformer confusion
  121. need amp schematic help
  122. reviving an old Randall RGT100
  123. lm317 and heater supply.
  124. BJT Voltage Bootstrap - SLCF
  125. Ideas for a cheap 200mA tube rectified PSU
  126. Need help with tube rectifier
  127. Tube or Circuit Noise?
  128. JE Labs (Angela instr.) : your favorite 2A3 schematic ?
  129. Crack the Code Amp build 1000 Watt Tube Amplifier
  130. 12E1 in fixed bias - too much current!
  131. CD-DVD player vs Notebook-usb soundcard sensitivity issue
  132. photo of Knight KP-70 preamplifier for missing component
  133. heater wear sign?
  134. Musical Fidelty X-10D Clone
  135. 815 amp
  136. Jorgen Schou 31,5 OT connection
  137. Is there such a thing....
  138. Tube Rectifiers and Common Grounds
  139. vt4c.com copper tube socket mounts
  140. 1 Ohm Tap Output tranformers?
  141. Voltage Specs For Heaters-Is 2.4V Good Enough?
  142. Aikido with 5842
  143. Luxman MQ70
  144. Valve pre-amp schematic help needed
  145. valves' world - tossie Japan
  146. 211 amp , recognize the circuit?
  147. Tube Preamp: Remedy For Digital Glare?
  148. Tubelab SSE without tube rectifier
  149. Counterpoint 7A
  150. Low Z Out Dual Triode
  151. Push Pull circuit - controlling sensitivity
  152. Moto 3 channel to Maggy 175
  153. PMillett Landfall heatsink
  154. lower the gain
  155. KT88?
  156. Sphinx Project Fourteen help wanted
  157. will this work and looking for suggestions
  158. Squeal on shutdown
  159. Newbie to SRPP and Tubes , 1 question.
  160. Question about interconnect transformers
  161. another toy - el84 PP class A
  162. Problem with biasing - no voltage drop on a cathode resistor
  163. EL84 PP current fluctuating
  164. Aikido Preamp Questions (again)
  165. Amp caused crack
  166. OPT performances
  167. Hammond 125ESE in 2A3 SE : better substitutions ?
  168. Headphone Impedance and headphone amplifier
  169. Could this tube be good for audio ?
  170. Output Transformer for SE / headphone amp
  171. pioneer sm-b200a
  172. 12AT7 Tubes ?
  173. Gold Lion kt77 bias help?
  174. Need some bias control help
  175. Lafayette LA-224a/b modernization?
  176. Need help completing vintage 6L6 amp
  177. Direct Russian equivilent for 5687, is there one ?
  178. Attenuation for 0.5dBs
  179. Dynaco ST-120 Impedance Concern Martin Logan
  180. Some 1626 Darling Amp Questions
  181. Choosing a SE 2A3 shematic : hum as a criteria...
  182. Rectifier question, voltage across diode.
  183. Angela simple 2A3
  184. Cathode follower - resistor calculations/software
  185. Desperately Seeking OPT Covers
  186. Modified Tube Cricket Amp Questions
  187. Best sounding DIY amp kits for 45, 2A3 or 300B
  188. Pentode's screen voltage/current
  189. KT88 Cathode Current Runaway/Oscillations?
  190. O'netics, Electra Print: anyone have both?
  191. How to maximize power transfer in tube circuit designs, damping is not the question!
  192. Inexpensive 2.5k primary SET OPT with 90mA+ DC bias rating?
  193. 4p1L Ultralinear
  194. RH300B 12W with 1% THD
  195. This is where the adventure begins
  196. 12AU7 pre rebuild suggestions
  197. Subwoofer Channel on Tube Amp
  198. Changing input tube from 12ax7 to 6AU6A on OTL project
  199. Yaqin MC5881a
  200. Humming Sound from tube amp
  201. Level Five 2A3 SE schematic : opinions ?
  202. My screwup = free PCBs...
  203. New stuff on the website: A2 buffer, isolated current sensor
  204. 12.6vDC Heaters, looking for a shortcut
  205. Fisher 80-AZ bias milliamps?
  206. Can shed some light on this EL 34 schematic diagram
  207. Solid State Rectifier in Dynaco Tube Amp
  208. Big chassis designs!
  209. 12ax7 LP
  210. plitron output w/ cfb usage ideas
  211. 390 ohm should have been 390k ohm
  212. Advice sought re what tube power amp
  213. EL34 SED Winged C Black Prints: original??
  214. OPTx from Ogonowski
  215. Aikido cathode follower (ACF) with 12au7
  216. Ampeg vt60 tri ax (did it really exist?)
  217. SEP EL-34 to 6L6GC?
  218. Volume Pot Spec
  219. My Tube Pre-Amp Picking up an AM radio station?
  220. Philips 6SN7 GTA & GTB
  221. ST-120 Problem With Rectifier Tube
  222. New Yaqin VK-2100
  223. Electronic parts and sub-zero temperature
  224. Bendix 6384 as EL34: Experience anyone?
  225. Audioresearch LS2B schematic needed
  226. input noise - too simple - but need explaination
  227. Plate voltage with/without tube (for fine tune bias adjustemnt)
  228. Using trimmers / potentiometers to adjust tube operating points
  229. KT88 SED winged C tolerance tall for quad
  230. Power Transformer Tolerances
  231. 12E1 Ultra Linear
  232. Comparison KT150 versus KT120
  233. 6sn7: GT GTA GTB sono differences for HIFI
  234. Audio Research LS5 Power Supply Problem
  235. Vintage grundig vs. new Yaqin. Advice?
  236. 5AR4 PSU
  237. What tube is this ?
  238. Need Schematic
  239. Budget PP Iron: Transcendar or Edcor?
  240. Yaqin MC-10L buzz
  241. Transformer buzzing when filament section is loaded
  242. Grid Stopper v Grid Leak on el84
  243. 2.5V Heater Tranformer-Best to Use One Per Channel?
  244. Amp: KT88 push-pull shunt feedback output via p-channel fet
  245. My biggest fear....
  246. I've made an awful mess...
  247. Any input for a tube noob's first attempt? Flea Watt 12b4, 6dj8, low B+
  248. HV scope use
  249. Kolster-Brandes er30
  250. Buzz that goes away when input grounded.

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