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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. Luxman Active 3-way Tube Crossover
  15. opinion on dynaco mark VI
  16. How can i have 450 Volts ?
  17. Balanced Preamp
  18. ecc99-300b
  19. Question about the tube specs/testing?
  20. Transformer Winding Configuration, Hafler 2,815,402
  21. PSU with SS Choke for Loftin-White 2a3.
  22. HP 8903 Pete Millet's Software on Window 8 ?
  23. Cathode Destruction
  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 SE triode amplifier
  32. Tetra Sans PS Phono Stage Power Supply
  33. transformer test
  34. New OTL headphone project with EC88 and 6080
  35. Philips Tube Code
  36. Edcor GXPP vs. CXPP
  37. Shorting or Non-Shorting Rotary Switch: Hi-Low Z tube headphone amp
  38. affordable potted power transformer?
  39. Am I pushing the envelope too far? Layout concerns.
  40. Pete Millet's Uniamp
  41. 6211 for???
  42. Picking an output transformer: power vs. sound quality
  43. Tube emulation with transistors
  44. Altec 1570b Tube Swap
  45. Popping stepped attenuator
  46. 6922 driver/cathodyne - direct coupled
  47. Solid state rectifier with these tubes
  48. Need advice -- Improving an old tube amp
  49. KT88 SE developed a buzz
  50. Guidance on amp design
  51. OTL3 Autograph Series
  52. DAC Tube i/v help!
  53. Need help figuring out a tube amp!
  54. Parallel 12AT7 output stage design?
  55. 6SN7 SRPP
  56. Problem Bi-Amping
  57. Amplifier recommendation
  58. DIY tube amplifier got no sound but all tubes are fired up.
  59. Circuit for Melos 333
  60. DHT Tube regulated power supply
  61. Akai M8 Restoration, newbie questions
  62. Bench Power Supply - what to get?
  63. Telefunken RS241 Design Help
  64. Telefunken Hymnus 5328 MX console
  65. Some Dummy DHT Questions
  66. Inductance loading tube stage questions
  67. Simple tube kit for tube sound ?
  68. Voltage Divider with Capacitor Across Resistor to Ground
  69. FM Demodulator for Tube receivers
  70. The best amp to DIY?
  71. SE Tubelab / EL34b tubes / Transformers
  72. Heath Kit Pre Amp
  73. Preamp hiss noise
  74. Tube preamp?
  75. 417a load line
  76. 6N1 + 6P3P build, need some help.
  77. Caps connected in series in Audio Note kit 4
  78. Ground loop cure?
  79. Dynaco ST-70 Clone
  80. Op Amp Phase Splitter
  81. Idea for ECC85 or EM84?
  82. Why no sound?
  83. single ended tube amp sounds itself
  84. Proper Pentode Usage 717A (713A)
  85. Help with Mullard 5 20 project
  86. Help on Negative Feedback in KT66 PP
  87. Trying to understand 6BM8 regulator (audio note clone)
  88. 6AS7 headphone amp with Sophia Electric Mesh plate 274B rec. tube
  89. CR Kalypso Amp with output stage problem- Please help!
  90. "PEAK INPUT SIGNAL GRID-TO-GRID" question.
  91. EZ81 Load
  92. Rectifier question
  93. 6sn7-300b
  94. Balanced tube phono stage
  95. Your favorite 12B4A for a preamp ?
  96. Voltage rating for output coupling caps in 6J1 tube buffer?
  97. Single stage 845 amp
  98. Eagle tube library
  99. Using Choke in Choke Input Power Supply ?
  100. 6550 wrong high bias...
  101. Floating Bridged CCS Loaded P-P Tube Amp
  102. What to do with a problem Counterpoint SA-12
  103. 6Z9P Mu Stage max anode-cathode voltage
  104. Audio Innovations Series 500 parts
  105. Hagerman Trumpet phonostage
  106. PS design...success or failure?
  107. Kuba Serenade Stereo Console - Part III - Replacing all caps
  108. schematic of Knight KP-70 preamp or anyone having this amp?
  109. 6N6P Cathode Follower design value
  110. Radiotron 32W PP amp from RDH3
  111. Heater filament questions
  112. 46 in ultralinear mode
  113. help needed need transformer prim 230/110 sec 300v appr. 20ma +6,3v or 12,6v
  114. Output transformer confusion
  115. need amp schematic help
  116. lm317 and heater supply.
  117. BJT Voltage Bootstrap - SLCF
  118. Ideas for a cheap 200mA tube rectified PSU
  119. Need help with tube rectifier
  120. Tube or Circuit Noise?
  121. JE Labs (Angela instr.) : your favorite 2A3 schematic ?
  122. Crack the Code Amp build 1000 Watt Tube Amplifier
  123. 12E1 in fixed bias - too much current!
  124. CD-DVD player vs Notebook-usb soundcard sensitivity issue
  125. photo of Knight KP-70 preamplifier for missing component
  126. heater wear sign?
  127. Musical Fidelty X-10D Clone
  128. 815 amp
  129. Jorgen Schou 31,5 OT connection
  130. Is there such a thing....
  131. Tube Rectifiers and Common Grounds
  132. vt4c.com copper tube socket mounts
  133. 1 Ohm Tap Output tranformers?
  134. Voltage Specs For Heaters-Is 2.4V Good Enough?
  135. Aikido with 5842
  136. Luxman MQ70
  137. Valve pre-amp schematic help needed
  138. valves' world - tossie Japan
  139. 211 amp , recognize the circuit?
  140. Tube Preamp: Remedy For Digital Glare?
  141. Tubelab SSE without tube rectifier
  142. Counterpoint 7A
  143. Low Z Out Dual Triode
  144. Push Pull circuit - controlling sensitivity
  145. Moto 3 channel to Maggy 175
  146. PMillett Landfall heatsink
  147. lower the gain
  148. KT88?
  149. Sphinx Project Fourteen help wanted
  150. will this work and looking for suggestions
  151. Squeal on shutdown
  152. Newbie to SRPP and Tubes , 1 question.
  153. Question about interconnect transformers
  154. another toy - el84 PP class A
  155. Problem with biasing - no voltage drop on a cathode resistor
  156. EL84 PP current fluctuating
  157. Aikido Preamp Questions (again)
  158. Amp caused crack
  159. OPT performances
  160. Hammond 125ESE in 2A3 SE : better substitutions ?
  161. Headphone Impedance and headphone amplifier
  162. Could this tube be good for audio ?
  163. Output Transformer for SE / headphone amp
  164. pioneer sm-b200a
  165. 12AT7 Tubes ?
  166. Gold Lion kt77 bias help?
  167. Need some bias control help
  168. Lafayette LA-224a/b modernization?
  169. Need help completing vintage 6L6 amp
  170. Direct Russian equivilent for 5687, is there one ?
  171. Attenuation for 0.5dBs
  172. Dynaco ST-120 Impedance Concern Martin Logan
  173. Some 1626 Darling Amp Questions
  174. Choosing a SE 2A3 shematic : hum as a criteria...
  175. Rectifier question, voltage across diode.
  176. Angela simple 2A3
  177. Cathode follower - resistor calculations/software
  178. Desperately Seeking OPT Covers
  179. Modified Tube Cricket Amp Questions
  180. Best sounding DIY amp kits for 45, 2A3 or 300B
  181. Pentode's screen voltage/current
  182. KT88 Cathode Current Runaway/Oscillations?
  183. O'netics, Electra Print: anyone have both?
  184. How to maximize power transfer in tube circuit designs, damping is not the question!
  185. Inexpensive 2.5k primary SET OPT with 90mA+ DC bias rating?
  186. 4p1L Ultralinear
  187. RH300B 12W with 1% THD
  188. This is where the adventure begins
  189. 12AU7 pre rebuild suggestions
  190. Subwoofer Channel on Tube Amp
  191. Changing input tube from 12ax7 to 6AU6A on OTL project
  192. Yaqin MC5881a
  193. Humming Sound from tube amp
  194. Level Five 2A3 SE schematic : opinions ?
  195. My screwup = free PCBs...
  196. New stuff on the website: A2 buffer, isolated current sensor
  197. 12.6vDC Heaters, looking for a shortcut
  198. Fisher 80-AZ bias milliamps?
  199. Can shed some light on this EL 34 schematic diagram
  200. Solid State Rectifier in Dynaco Tube Amp
  201. Big chassis designs!
  202. 12ax7 LP
  203. plitron output w/ cfb usage ideas
  204. 390 ohm should have been 390k ohm
  205. Advice sought re what tube power amp
  206. EL34 SED Winged C Black Prints: original??
  207. OPTx from Ogonowski
  208. Aikido cathode follower (ACF) with 12au7
  209. SEP EL-34 to 6L6GC?
  210. Volume Pot Spec
  211. My Tube Pre-Amp Picking up an AM radio station?
  212. Philips 6SN7 GTA & GTB
  213. ST-120 Problem With Rectifier Tube
  214. New Yaqin VK-2100
  215. Electronic parts and sub-zero temperature
  216. Bendix 6384 as EL34: Experience anyone?
  217. Audioresearch LS2B schematic needed
  218. input noise - too simple - but need explaination
  219. Plate voltage with/without tube (for fine tune bias adjustemnt)
  220. Using trimmers / potentiometers to adjust tube operating points
  221. KT88 SED winged C tolerance tall for quad
  222. Power Transformer Tolerances
  223. 12E1 Ultra Linear
  224. Comparison KT150 versus KT120
  225. 6sn7: GT GTA GTB sono differences for HIFI
  226. Audio Research LS5 Power Supply Problem
  227. Vintage grundig vs. new Yaqin. Advice?
  228. 5AR4 PSU
  229. What tube is this ?
  230. Need Schematic
  231. Budget PP Iron: Transcendar or Edcor?
  232. Yaqin MC-10L buzz
  233. Transformer buzzing when filament section is loaded
  234. Grid Stopper v Grid Leak on el84
  235. 2.5V Heater Tranformer-Best to Use One Per Channel?
  236. Amp: KT88 push-pull shunt feedback output via p-channel fet
  237. My biggest fear....
  238. I've made an awful mess...
  239. Any input for a tube noob's first attempt? Flea Watt 12b4, 6dj8, low B+
  240. Kolster-Brandes er30
  241. Buzz that goes away when input grounded.
  242. Hovland HP-100 tube replacement
  243. Dynaco ST-120 Turn On Pop or Problem
  244. Grounding two channel preamp sharing a psu.
  245. Convert hybrid amp to pure tube output?
  246. Please Help me with this tubes
  247. 211- 6e5p full amp. The first setps
  248. E810F and general pentodes design question
  249. Pop goes the bias cap.
  250. High Power Single Ended Triode, Design

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