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  1. Newbie just wondering if this PP amp looks ok
  2. 6P36S push pull HiFi amp
  3. Another Output Transformer Wiring Question
  4. Cathode bias for EL84 PPP
  5. Output Transformer Wiring Question
  6. NJ7P Tube Database
  7. solving my old radiogram sound issues - help
  8. 6H9c Idle Current.
  9. 12E1 SE amp suggestions.
  10. Direct Coupled Output Stage, DC Bias Balance
  11. Pre-amp tube suggestions for 2A3 output tube
  12. AirTight ATM-1 Schematic
  13. Counterpoint SA 5000 Service manual and PSU
  14. Rectifier tube ? - Berman 76 preamp
  15. Cathode feedback (SE amp)
  16. Will anybody interest in stamp size ccs module?
  17. Fairchild voltage questions
  18. Help with a Sylvania 7695 Project
  19. Flicker Noise dominates triode noise in audio (AES)
  20. A tube for SE with 1k-1k5 load
  21. scott stereomaster 233 restoration
  22. Homebrew Dynaco MkIII Problems - PLEASE HELP!
  23. What to do with C3g tubes
  24. Can anyone ID an output transformer's part number?
  25. Nestorovic NA-1 & Alpha-1 Schematics
  26. Data for 6BD2
  27. Ken Shindo R.I.P
  28. HiFi 6n9p EL34 B + 5z3p Class A Tube valve amplifier
  29. Seas Trym with SE KT88 amplifier?
  30. 845-Amp-IT-Coupled
  31. Data for 6RA3
  32. Miniwatt N3 not turning on!
  33. I need ideas on a can capacitor
  34. Help with tube for power supply...
  35. AVC vs TVC for 10y line preamp
  36. help needed with Lumley 120 monoblocks + Sonus Fabre speakers
  37. help on 845 amp
  38. High voltage power tube question
  39. Tribute OPT for PSE 300B
  40. Floating Paraphase.
  41. 6Q7G as driver in RH807
  42. Custom tubes4hifi m-125 monoblocks
  43. Antique Audio Preamlifier made in USA
  44. directly heated tube rectifiers
  45. Biasing a 12EA6 low voltage pentode
  46. Power supply doubt
  47. Vinyl Savor's Octal 6GL7 preamp?
  48. 837 tube
  49. Tone control bypass (Kontakt KT-7)
  50. drdwers
  51. Amplifier Sensitivity?
  52. identify nickel laminations
  53. Recapping Vintage EL84 amp
  54. opinion on dynaco mark VI
  55. How can i have 450 Volts ?
  56. Balanced Preamp
  57. ecc99-300b
  58. Question about the tube specs/testing?
  59. Transformer Winding Configuration, Hafler 2,815,402
  60. PSU with SS Choke for Loftin-White 2a3.
  61. HP 8903 Pete Millet's Software on Window 8 ?
  62. Cathode Destruction
  63. Earth SuperBass B-2000 bass head info needed
  64. More radio shack dissapointment
  65. What to do with transformer secondary when used as a choke?
  66. Slight transformer buzzing in Engineers Amp
  67. Couple Gyrator Questions
  68. Shishido/Loftin-White 2A3/45 Extasy..
  69. When is a tube not a Valve?
  70. Relay Recommendataion
  71. 6080 monotriod amplifier
  72. Tetra Sans PS Phono Stage Power Supply
  73. transformer test
  74. Could someone tell me more about the Mesa Boogie Strategy 400?
  75. New OTL headphone project with EC88 and 6080
  76. Philips Tube Code
  77. Edcor GXPP vs. CXPP
  78. Shorting or Non-Shorting Rotary Switch: Hi-Low Z tube headphone amp
  79. Marshall Guitar Conversion 12AX7 Replacement
  80. affordable potted power transformer?
  81. Am I pushing the envelope too far? Layout concerns.
  82. Pete Millet's Uniamp
  83. 6211 for???
  84. Picking an output transformer: power vs. sound quality
  85. Tube emulation with transistors
  86. Altec 1570b Tube Swap
  87. Popping stepped attenuator
  88. 6922 driver/cathodyne - direct coupled
  89. Solid state rectifier with these tubes
  90. Need advice -- Improving an old tube amp
  91. KT88 SE developed a buzz
  92. Guidance on amp design
  93. OTL3 Autograph Series
  94. DAC Tube i/v help!
  95. Need help figuring out a tube amp!
  96. Parallel 12AT7 output stage design?
  97. 6SN7 SRPP
  98. Problem Bi-Amping
  99. Amplifier recommendation
  100. DIY tube amplifier got no sound but all tubes are fired up.
  101. Circuit for Melos 333
  102. DHT Tube regulated power supply
  103. Akai M8 Restoration, newbie questions
  104. Bench Power Supply - what to get?
  105. Telefunken RS241 Design Help
  106. Telefunken Hymnus 5328 MX console
  107. Some Dummy DHT Questions
  108. Inductance loading tube stage questions
  109. Simple tube kit for tube sound ?
  110. Voltage Divider with Capacitor Across Resistor to Ground
  111. FM Demodulator for Tube receivers
  112. The best amp to DIY?
  113. SE Tubelab / EL34b tubes / Transformers
  114. Heath Kit Pre Amp
  115. Preamp hiss noise
  116. Tube preamp?
  117. 417a load line
  118. 6N1 + 6P3P build, need some help.
  119. Caps connected in series in Audio Note kit 4
  120. Ground loop cure?
  121. Dynaco ST-70 Clone
  122. Op Amp Phase Splitter
  123. Idea for ECC85 or EM84?
  124. Why no sound?
  125. single ended tube amp sounds itself
  126. Proper Pentode Usage 717A (713A)
  127. Help with Mullard 5 20 project
  128. Help on Negative Feedback in KT66 PP
  129. Trying to understand 6BM8 regulator (audio note clone)
  130. 6AS7 headphone amp with Sophia Electric Mesh plate 274B rec. tube
  131. CR Kalypso Amp with output stage problem- Please help!
  132. "PEAK INPUT SIGNAL GRID-TO-GRID" question.
  133. EZ81 Load
  134. Rectifier question
  135. 6sn7-300b
  136. Balanced tube phono stage
  137. Your favorite 12B4A for a preamp ?
  138. Voltage rating for output coupling caps in 6J1 tube buffer?
  139. Single stage 845 amp
  140. Eagle tube library
  141. Using Choke in Choke Input Power Supply ?
  142. 6550 wrong high bias...
  143. Floating Bridged CCS Loaded P-P Tube Amp
  144. What to do with a problem Counterpoint SA-12
  145. 6Z9P Mu Stage max anode-cathode voltage
  146. Audio Innovations Series 500 parts
  147. Hagerman Trumpet phonostage
  148. PS design...success or failure?
  149. Kuba Serenade Stereo Console - Part III - Replacing all caps
  150. schematic of Knight KP-70 preamp or anyone having this amp?
  151. 6N6P Cathode Follower design value
  152. Radiotron 32W PP amp from RDH3
  153. Heater filament questions
  154. 46 in ultralinear mode
  155. help needed need transformer prim 230/110 sec 300v appr. 20ma +6,3v or 12,6v
  156. Output transformer confusion
  157. need amp schematic help
  158. reviving an old Randall RGT100
  159. lm317 and heater supply.
  160. BJT Voltage Bootstrap - SLCF
  161. Ideas for a cheap 200mA tube rectified PSU
  162. Need help with tube rectifier
  163. Tube or Circuit Noise?
  164. JE Labs (Angela instr.) : your favorite 2A3 schematic ?
  165. Crack the Code Amp build 1000 Watt Tube Amplifier
  166. 12E1 in fixed bias - too much current!
  167. CD-DVD player vs Notebook-usb soundcard sensitivity issue
  168. photo of Knight KP-70 preamplifier for missing component
  169. heater wear sign?
  170. Musical Fidelty X-10D Clone
  171. 815 amp
  172. Jorgen Schou 31,5 OT connection
  173. Is there such a thing....
  174. Tube Rectifiers and Common Grounds
  175. vt4c.com copper tube socket mounts
  176. 1 Ohm Tap Output tranformers?
  177. Voltage Specs For Heaters-Is 2.4V Good Enough?
  178. Aikido with 5842
  179. Luxman MQ70
  180. Valve pre-amp schematic help needed
  181. valves' world - tossie Japan
  182. 211 amp , recognize the circuit?
  183. Tube Preamp: Remedy For Digital Glare?
  184. Tubelab SSE without tube rectifier
  185. Counterpoint 7A
  186. Low Z Out Dual Triode
  187. Push Pull circuit - controlling sensitivity
  188. Moto 3 channel to Maggy 175
  189. PMillett Landfall heatsink
  190. lower the gain
  191. KT88?
  192. Sphinx Project Fourteen help wanted
  193. will this work and looking for suggestions
  194. Squeal on shutdown
  195. Newbie to SRPP and Tubes , 1 question.
  196. Question about interconnect transformers
  197. another toy - el84 PP class A
  198. Problem with biasing - no voltage drop on a cathode resistor
  199. EL84 PP current fluctuating
  200. Aikido Preamp Questions (again)
  201. Amp caused crack
  202. OPT performances
  203. Hammond 125ESE in 2A3 SE : better substitutions ?
  204. Headphone Impedance and headphone amplifier
  205. Could this tube be good for audio ?
  206. Output Transformer for SE / headphone amp
  207. pioneer sm-b200a
  208. 12AT7 Tubes ?
  209. Gold Lion kt77 bias help?
  210. Need some bias control help
  211. Lafayette LA-224a/b modernization?
  212. Need help completing vintage 6L6 amp
  213. Direct Russian equivilent for 5687, is there one ?
  214. Attenuation for 0.5dBs
  215. Dynaco ST-120 Impedance Concern Martin Logan
  216. Some 1626 Darling Amp Questions
  217. Choosing a SE 2A3 shematic : hum as a criteria...
  218. Rectifier question, voltage across diode.
  219. Angela simple 2A3
  220. Cathode follower - resistor calculations/software
  221. Desperately Seeking OPT Covers
  222. Modified Tube Cricket Amp Questions
  223. Best sounding DIY amp kits for 45, 2A3 or 300B
  224. Pentode's screen voltage/current
  225. KT88 Cathode Current Runaway/Oscillations?
  226. O'netics, Electra Print: anyone have both?
  227. How to maximize power transfer in tube circuit designs, damping is not the question!
  228. Inexpensive 2.5k primary SET OPT with 90mA+ DC bias rating?
  229. 4p1L Ultralinear
  230. RH300B 12W with 1% THD
  231. This is where the adventure begins
  232. 12AU7 pre rebuild suggestions
  233. Subwoofer Channel on Tube Amp
  234. Changing input tube from 12ax7 to 6AU6A on OTL project
  235. Yaqin MC5881a
  236. Humming Sound from tube amp
  237. Level Five 2A3 SE schematic : opinions ?
  238. My screwup = free PCBs...
  239. New stuff on the website: A2 buffer, isolated current sensor
  240. 12.6vDC Heaters, looking for a shortcut
  241. Fisher 80-AZ bias milliamps?
  242. Can shed some light on this EL 34 schematic diagram
  243. Solid State Rectifier in Dynaco Tube Amp
  244. Big chassis designs!
  245. 12ax7 LP
  246. plitron output w/ cfb usage ideas
  247. 390 ohm should have been 390k ohm
  248. Advice sought re what tube power amp
  249. EL34 SED Winged C Black Prints: original??
  250. OPTx from Ogonowski

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