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

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