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  1. JE Labs (Angela instr.) : your favorite 2A3 schematic ?
  2. Crack the Code Amp build 1000 Watt Tube Amplifier
  3. 12E1 in fixed bias - too much current!
  4. CD-DVD player vs Notebook-usb soundcard sensitivity issue
  5. photo of Knight KP-70 preamplifier for missing component
  6. heater wear sign?
  7. Musical Fidelty X-10D Clone
  8. 815 amp
  9. Jorgen Schou 31,5 OT connection
  10. Is there such a thing....
  11. Tube Rectifiers and Common Grounds
  12. vt4c.com copper tube socket mounts
  13. 1 Ohm Tap Output tranformers?
  14. Voltage Specs For Heaters-Is 2.4V Good Enough?
  15. Aikido with 5842
  16. Luxman MQ70
  17. Valve pre-amp schematic help needed
  18. valves' world - tossie Japan
  19. 211 amp , recognize the circuit?
  20. Tube Preamp: Remedy For Digital Glare?
  21. Tubelab SSE without tube rectifier
  22. Counterpoint 7A
  23. Low Z Out Dual Triode
  24. Push Pull circuit - controlling sensitivity
  25. Moto 3 channel to Maggy 175
  26. PMillett Landfall heatsink
  27. lower the gain
  28. KT88?
  29. Sphinx Project Fourteen help wanted
  30. will this work and looking for suggestions
  31. Squeal on shutdown
  32. Newbie to SRPP and Tubes , 1 question.
  33. Question about interconnect transformers
  34. another toy - el84 PP class A
  35. Problem with biasing - no voltage drop on a cathode resistor
  36. EL84 PP current fluctuating
  37. Aikido Preamp Questions (again)
  38. Amp caused crack
  39. OPT performances
  40. Hammond 125ESE in 2A3 SE : better substitutions ?
  41. Headphone Impedance and headphone amplifier
  42. Could this tube be good for audio ?
  43. Output Transformer for SE / headphone amp
  44. pioneer sm-b200a
  45. 12AT7 Tubes ?
  46. Gold Lion kt77 bias help?
  47. Need some bias control help
  48. Lafayette LA-224a/b modernization?
  49. Need help completing vintage 6L6 amp
  50. Direct Russian equivilent for 5687, is there one ?
  51. Attenuation for 0.5dBs
  52. Dynaco ST-120 Impedance Concern Martin Logan
  53. Some 1626 Darling Amp Questions
  54. Choosing a SE 2A3 shematic : hum as a criteria...
  55. Rectifier question, voltage across diode.
  56. Angela simple 2A3
  57. Cathode follower - resistor calculations/software
  58. Desperately Seeking OPT Covers
  59. Modified Tube Cricket Amp Questions
  60. Best sounding DIY amp kits for 45, 2A3 or 300B
  61. Pentode's screen voltage/current
  62. KT88 Cathode Current Runaway/Oscillations?
  63. O'netics, Electra Print: anyone have both?
  64. How to maximize power transfer in tube circuit designs, damping is not the question!
  65. Inexpensive 2.5k primary SET OPT with 90mA+ DC bias rating?
  66. 4p1L Ultralinear
  67. RH300B 12W with 1% THD
  68. This is where the adventure begins
  69. 12AU7 pre rebuild suggestions
  70. Subwoofer Channel on Tube Amp
  71. Changing input tube from 12ax7 to 6AU6A on OTL project
  72. Yaqin MC5881a
  73. Humming Sound from tube amp
  74. Level Five 2A3 SE schematic : opinions ?
  75. My screwup = free PCBs...
  76. New stuff on the website: A2 buffer, isolated current sensor
  77. 12.6vDC Heaters, looking for a shortcut
  78. Fisher 80-AZ bias milliamps?
  79. Can shed some light on this EL 34 schematic diagram
  80. Solid State Rectifier in Dynaco Tube Amp
  81. Big chassis designs!
  82. 12ax7 LP
  83. plitron output w/ cfb usage ideas
  84. 390 ohm should have been 390k ohm
  85. Advice sought re what tube power amp
  86. EL34 SED Winged C Black Prints: original??
  87. OPTx from Ogonowski
  88. Aikido cathode follower (ACF) with 12au7
  89. SEP EL-34 to 6L6GC?
  90. Volume Pot Spec
  91. My Tube Pre-Amp Picking up an AM radio station?
  92. Philips 6SN7 GTA & GTB
  93. ST-120 Problem With Rectifier Tube
  94. New Yaqin VK-2100
  95. Electronic parts and sub-zero temperature
  96. Bendix 6384 as EL34: Experience anyone?
  97. Audioresearch LS2B schematic needed
  98. input noise - too simple - but need explaination
  99. Plate voltage with/without tube (for fine tune bias adjustemnt)
  100. Using trimmers / potentiometers to adjust tube operating points
  101. KT88 SED winged C tolerance tall for quad
  102. Power Transformer Tolerances
  103. 12E1 Ultra Linear
  104. Comparison KT150 versus KT120
  105. 6sn7: GT GTA GTB sono differences for HIFI
  106. Audio Research LS5 Power Supply Problem
  107. Vintage grundig vs. new Yaqin. Advice?
  108. 5AR4 PSU
  109. What tube is this ?
  110. Need Schematic
  111. Budget PP Iron: Transcendar or Edcor?
  112. Yaqin MC-10L buzz
  113. Transformer buzzing when filament section is loaded
  114. Grid Stopper v Grid Leak on el84
  115. 2.5V Heater Tranformer-Best to Use One Per Channel?
  116. Amp: KT88 push-pull shunt feedback output via p-channel fet
  117. My biggest fear....
  118. I've made an awful mess...
  119. Any input for a tube noob's first attempt? Flea Watt 12b4, 6dj8, low B+
  120. HV scope use
  121. Kolster-Brandes er30
  122. Buzz that goes away when input grounded.
  123. Hovland HP-100 tube replacement
  124. Dynaco ST-120 Turn On Pop or Problem
  125. Grounding two channel preamp sharing a psu.
  126. Convert hybrid amp to pure tube output?
  127. Please Help me with this tubes
  128. resistor maximum voltage rating
  129. 211- 6e5p full amp. The first setps
  130. E810F and general pentodes design question
  131. Pop goes the bias cap.
  132. High Power Single Ended Triode, Design
  133. Yaqin MS-6V6 vs. Markhill MS-6V6
  134. Schematic please: Luxman MQ-70?
  135. Aikido tube preamp with Tortuga LDR volume control
  136. Type 37 tube preamp
  137. Figuring out a KT88 datasheet?
  138. Power supply 260V for tube preamp
  139. Aikido Tube with Tortuga volume control project
  140. Adding a pre out to amp
  141. One or two ECC82 for two channels (crosstalk)!
  142. Red Pilot (240)
  143. 77:1 Output Transformer Question
  144. Power transformer recommendation Kt88 SE and JE labs Riaa
  145. Tube output power for OPT calculation
  146. 6sn7 tube anode folower question?????
  147. Goldox 9300
  148. good quality/sounding preamp advice
  149. PL84 schematic question.
  150. YouTube Video: 12AX7 comparisons.
  151. How many volts ???
  152. Greetings all/ (newbie) Need Advice!
  153. Psud and Single Ended Amplifier
  154. Socket Combiniations
  155. From Potentiometer to Stepped Attenuator
  156. No need for bleed resistors on Fisher 90-T
  157. Sophia 300B+ carbon
  158. PL519 amp SE
  159. C3g Headphone design - will this work?
  160. Luxman 2A3 amp SE
  161. Capacitor on Aikido Power Supply Sampling Circuit
  162. Well, what have I done now?
  163. Aikido CF cathode resistor?
  164. D3A - 6P45S/El519 SE "The staircase" my first h-end amplifier.
  165. SET Cathode Biased vs. Fixed Bias?
  166. JAN6418 pre-amp advise
  167. SOHA II amp tripping
  168. 6JN6 LTspice model?
  169. unusual output transformers, what are they for?
  170. Cheap power amp kit with 6N2 + 6P3
  171. KT88 AMP I'm not sure about power supply
  172. buzz from tubes
  173. Good Power Supply??
  174. Audio Research SP6C
  175. Junk Audio Project (pics)
  176. SE SV83 Paralled Tube Amplifer
  177. Hum in SVP preamp circuit
  178. Advice/tips on tube preamplifier wanted
  179. Transformer Windfall. Now what?
  180. I am being cautious - need to install a ground plug
  181. My first scratch build (6AQ5 SE)....
  182. Pop, Pop, Pop, Pop, Pop
  183. what is this valve? and what is it for??
  184. Lazarus cascade basic preamp
  185. Seperate Power Supply Chassis and Grounding
  186. How To Solder Tips and Tricks
  187. Another CD player tube mod, TDA1541 with transformers and triode cathode followers
  188. PCL86 - Worth a try?
  189. Audio use 3D6/1299 ?
  190. How HOT should a LM317 get?
  191. KT88 amp questions
  192. Restoring a Motorola HS-1048A amp
  193. Please look at this schematic and tells me what have went wrong
  194. Lacking bass response after re-cap
  195. Generate a negative bias voltage?
  196. hammond 369ex instead of 269ex
  197. Recapped a pair of monoblocks
  198. Top Secret!
  199. Toggle or Rotary Switch for Phono Inputs
  200. Flexible tube (or SS) electronic XO
  201. LAVATORY - Lamp Valve Transistor Hybrid (will this work?)
  202. Transformer revers use question
  203. Fixed bias, cathode feedback?
  204. spudnik, spudMiG ?
  205. I need the KT120 base dimensions
  206. Need help with chassis layout.
  207. tube amp ID ?
  208. GU50 filaments voltage!
  209. Does anybody have an RCA RS171 Schematic
  210. Opinions wanted: Low Z SE power supplies
  211. DC heaters, best way to bias ?
  212. Ignition coil as SE OPT
  213. Opt color code identification (Onetics)
  214. Drawback to Larger Capacity Output Transformer Than Required?
  215. Send me some pictures of your amps
  216. leak stereo 60
  217. B2 Spice V5.0
  218. Mains Fuse and Switch Best Practice
  219. Identify these vintage tube amp rivets
  220. RCA ORTHOPHONIC LMI-32216A manual copy needed
  221. Question on strange 6l6 schematic symbols
  222. Resistor value?
  223. ST70 chassis polishing
  224. Octal to RCA
  225. KT120 plate load for 150+watts
  226. Need a copy of Aikido 5687 manual pdf
  227. Nutshell Raven Headphone amp with balanced I/O
  228. Bartolucci: beware of him !!!
  229. Finding plate resistance
  230. Pleides Tube only headphone amp
  231. I think I know what I want (seasoned advice)
  232. CCS filament supply vs inductors for DHT
  233. Cap outer foil low impedance help...
  234. Distorted low end SE micro amp
  235. LM3886 + ECC82/12AU7
  236. My LCR phono with HUM....
  237. Winter 2A3 SET project.
  238. 6BQ5 pp with LM317 ccs
  239. Marantz 7 clone
  240. Music Angel pre-amplifier - few modifications
  241. Transformer Questions (1st Amp Project)
  242. Morgan Jones and PS Bypass Caps
  243. Ruby Tuby at 24V?
  244. Budget Iron for Low-Power SET
  245. Output transformer mounting questions
  246. 3c24 preamp?
  247. Newb Q - JE Simple 2A3 as Monoblocks
  248. Vacuum tube amp design
  249. Counterpoint SA7.1 circuit question
  250. Variable Gain Control Topology

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