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  1. BJT Voltage Bootstrap - SLCF
  2. Ideas for a cheap 200mA tube rectified PSU
  3. Need help with tube rectifier
  4. Tube or Circuit Noise?
  5. JE Labs (Angela instr.) : your favorite 2A3 schematic ?
  6. Crack the Code Amp build 1000 Watt Tube Amplifier
  7. 12E1 in fixed bias - too much current!
  8. CD-DVD player vs Notebook-usb soundcard sensitivity issue
  9. photo of Knight KP-70 preamplifier for missing component
  10. heater wear sign?
  11. Musical Fidelty X-10D Clone
  12. 815 amp
  13. Jorgen Schou 31,5 OT connection
  14. Is there such a thing....
  15. Tube Rectifiers and Common Grounds
  16. vt4c.com copper tube socket mounts
  17. 1 Ohm Tap Output tranformers?
  18. Voltage Specs For Heaters-Is 2.4V Good Enough?
  19. Aikido with 5842
  20. Luxman MQ70
  21. Valve pre-amp schematic help needed
  22. valves' world - tossie Japan
  23. 211 amp , recognize the circuit?
  24. Tube Preamp: Remedy For Digital Glare?
  25. Tubelab SSE without tube rectifier
  26. Counterpoint 7A
  27. Low Z Out Dual Triode
  28. Push Pull circuit - controlling sensitivity
  29. Moto 3 channel to Maggy 175
  30. PMillett Landfall heatsink
  31. lower the gain
  32. KT88?
  33. Sphinx Project Fourteen help wanted
  34. will this work and looking for suggestions
  35. Squeal on shutdown
  36. Newbie to SRPP and Tubes , 1 question.
  37. Question about interconnect transformers
  38. another toy - el84 PP class A
  39. Problem with biasing - no voltage drop on a cathode resistor
  40. EL84 PP current fluctuating
  41. Aikido Preamp Questions (again)
  42. Amp caused crack
  43. OPT performances
  44. Hammond 125ESE in 2A3 SE : better substitutions ?
  45. Headphone Impedance and headphone amplifier
  46. Could this tube be good for audio ?
  47. Output Transformer for SE / headphone amp
  48. pioneer sm-b200a
  49. 12AT7 Tubes ?
  50. Gold Lion kt77 bias help?
  51. Need some bias control help
  52. Lafayette LA-224a/b modernization?
  53. Need help completing vintage 6L6 amp
  54. Direct Russian equivilent for 5687, is there one ?
  55. Attenuation for 0.5dBs
  56. Dynaco ST-120 Impedance Concern Martin Logan
  57. Some 1626 Darling Amp Questions
  58. Choosing a SE 2A3 shematic : hum as a criteria...
  59. Rectifier question, voltage across diode.
  60. Angela simple 2A3
  61. Cathode follower - resistor calculations/software
  62. Desperately Seeking OPT Covers
  63. Modified Tube Cricket Amp Questions
  64. Best sounding DIY amp kits for 45, 2A3 or 300B
  65. Pentode's screen voltage/current
  66. KT88 Cathode Current Runaway/Oscillations?
  67. O'netics, Electra Print: anyone have both?
  68. How to maximize power transfer in tube circuit designs, damping is not the question!
  69. Inexpensive 2.5k primary SET OPT with 90mA+ DC bias rating?
  70. 4p1L Ultralinear
  71. RH300B 12W with 1% THD
  72. This is where the adventure begins
  73. 12AU7 pre rebuild suggestions
  74. Subwoofer Channel on Tube Amp
  75. Changing input tube from 12ax7 to 6AU6A on OTL project
  76. Yaqin MC5881a
  77. Humming Sound from tube amp
  78. Level Five 2A3 SE schematic : opinions ?
  79. My screwup = free PCBs...
  80. New stuff on the website: A2 buffer, isolated current sensor
  81. 12.6vDC Heaters, looking for a shortcut
  82. Fisher 80-AZ bias milliamps?
  83. Can shed some light on this EL 34 schematic diagram
  84. Solid State Rectifier in Dynaco Tube Amp
  85. Big chassis designs!
  86. 12ax7 LP
  87. plitron output w/ cfb usage ideas
  88. 390 ohm should have been 390k ohm
  89. Advice sought re what tube power amp
  90. EL34 SED Winged C Black Prints: original??
  91. OPTx from Ogonowski
  92. Aikido cathode follower (ACF) with 12au7
  93. Ampeg vt60 tri ax (did it really exist?)
  94. SEP EL-34 to 6L6GC?
  95. Volume Pot Spec
  96. My Tube Pre-Amp Picking up an AM radio station?
  97. Philips 6SN7 GTA & GTB
  98. ST-120 Problem With Rectifier Tube
  99. New Yaqin VK-2100
  100. Electronic parts and sub-zero temperature
  101. Bendix 6384 as EL34: Experience anyone?
  102. Audioresearch LS2B schematic needed
  103. input noise - too simple - but need explaination
  104. Plate voltage with/without tube (for fine tune bias adjustemnt)
  105. Using trimmers / potentiometers to adjust tube operating points
  106. KT88 SED winged C tolerance tall for quad
  107. Power Transformer Tolerances
  108. 12E1 Ultra Linear
  109. Comparison KT150 versus KT120
  110. 6sn7: GT GTA GTB sono differences for HIFI
  111. Audio Research LS5 Power Supply Problem
  112. Vintage grundig vs. new Yaqin. Advice?
  113. 5AR4 PSU
  114. What tube is this ?
  115. Need Schematic
  116. Budget PP Iron: Transcendar or Edcor?
  117. Yaqin MC-10L buzz
  118. Transformer buzzing when filament section is loaded
  119. Grid Stopper v Grid Leak on el84
  120. 2.5V Heater Tranformer-Best to Use One Per Channel?
  121. Amp: KT88 push-pull shunt feedback output via p-channel fet
  122. My biggest fear....
  123. I've made an awful mess...
  124. Any input for a tube noob's first attempt? Flea Watt 12b4, 6dj8, low B+
  125. HV scope use
  126. Kolster-Brandes er30
  127. Buzz that goes away when input grounded.
  128. Hovland HP-100 tube replacement
  129. Dynaco ST-120 Turn On Pop or Problem
  130. Grounding two channel preamp sharing a psu.
  131. Convert hybrid amp to pure tube output?
  132. Please Help me with this tubes
  133. resistor maximum voltage rating
  134. 211- 6e5p full amp. The first setps
  135. E810F and general pentodes design question
  136. Pop goes the bias cap.
  137. High Power Single Ended Triode, Design
  138. Yaqin MS-6V6 vs. Markhill MS-6V6
  139. Schematic please: Luxman MQ-70?
  140. Aikido tube preamp with Tortuga LDR volume control
  141. Type 37 tube preamp
  142. Figuring out a KT88 datasheet?
  143. Power supply 260V for tube preamp
  144. Aikido Tube with Tortuga volume control project
  145. Adding a pre out to amp
  146. One or two ECC82 for two channels (crosstalk)!
  147. Red Pilot (240)
  148. 77:1 Output Transformer Question
  149. Power transformer recommendation Kt88 SE and JE labs Riaa
  150. Tube output power for OPT calculation
  151. 6sn7 tube anode folower question?????
  152. Goldox 9300
  153. good quality/sounding preamp advice
  154. PL84 schematic question.
  155. YouTube Video: 12AX7 comparisons.
  156. How many volts ???
  157. Greetings all/ (newbie) Need Advice!
  158. Psud and Single Ended Amplifier
  159. Socket Combiniations
  160. From Potentiometer to Stepped Attenuator
  161. No need for bleed resistors on Fisher 90-T
  162. Sophia 300B+ carbon
  163. Capacitor Temperature
  164. PL519 amp SE
  165. C3g Headphone design - will this work?
  166. Luxman 2A3 amp SE
  167. Capacitor on Aikido Power Supply Sampling Circuit
  168. Well, what have I done now?
  169. Aikido CF cathode resistor?
  170. D3A - 6P45S/El519 SE "The staircase" my first h-end amplifier.
  171. SET Cathode Biased vs. Fixed Bias?
  172. JAN6418 pre-amp advise
  173. SOHA II amp tripping
  174. 6JN6 LTspice model?
  175. unusual output transformers, what are they for?
  176. Cheap power amp kit with 6N2 + 6P3
  177. KT88 AMP I'm not sure about power supply
  178. buzz from tubes
  179. Good Power Supply??
  180. HK guitar amp - help with repair
  181. Audio Research SP6C
  182. Junk Audio Project (pics)
  183. SE SV83 Paralled Tube Amplifer
  184. Hum in SVP preamp circuit
  185. Advice/tips on tube preamplifier wanted
  186. Transformer Windfall. Now what?
  187. I am being cautious - need to install a ground plug
  188. My first scratch build (6AQ5 SE)....
  189. Pop, Pop, Pop, Pop, Pop
  190. what is this valve? and what is it for??
  191. Lazarus cascade basic preamp
  192. Seperate Power Supply Chassis and Grounding
  193. How To Solder Tips and Tricks
  194. Another CD player tube mod, TDA1541 with transformers and triode cathode followers
  195. PCL86 - Worth a try?
  196. Audio use 3D6/1299 ?
  197. How HOT should a LM317 get?
  198. KT88 amp questions
  199. Restoring a Motorola HS-1048A amp
  200. Please look at this schematic and tells me what have went wrong
  201. Lacking bass response after re-cap
  202. Generate a negative bias voltage?
  203. hammond 369ex instead of 269ex
  204. Recapped a pair of monoblocks
  205. Top Secret!
  206. Toggle or Rotary Switch for Phono Inputs
  207. Flexible tube (or SS) electronic XO
  208. LAVATORY - Lamp Valve Transistor Hybrid (will this work?)
  209. Transformer revers use question
  210. Fixed bias, cathode feedback?
  211. spudnik, spudMiG ?
  212. I need the KT120 base dimensions
  213. Need help with chassis layout.
  214. tube amp ID ?
  215. GU50 filaments voltage!
  216. Does anybody have an RCA RS171 Schematic
  217. Opinions wanted: Low Z SE power supplies
  218. DC heaters, best way to bias ?
  219. Ignition coil as SE OPT
  220. Opt color code identification (Onetics)
  221. Drawback to Larger Capacity Output Transformer Than Required?
  222. Send me some pictures of your amps
  223. leak stereo 60
  224. B2 Spice V5.0
  225. Mains Fuse and Switch Best Practice
  226. Identify these vintage tube amp rivets
  227. RCA ORTHOPHONIC LMI-32216A manual copy needed
  228. Question on strange 6l6 schematic symbols
  229. Resistor value?
  230. Paper / plastic hybrid capacitor
  231. ST70 chassis polishing
  232. Octal to RCA
  233. KT120 plate load for 150+watts
  234. Need a copy of Aikido 5687 manual pdf
  235. Nutshell Raven Headphone amp with balanced I/O
  236. Bartolucci: beware of him !!!
  237. Finding plate resistance
  238. Pleides Tube only headphone amp
  239. I think I know what I want (seasoned advice)
  240. CCS filament supply vs inductors for DHT
  241. Cap outer foil low impedance help...
  242. Distorted low end SE micro amp
  243. LM3886 + ECC82/12AU7
  244. My LCR phono with HUM....
  245. Winter 2A3 SET project.
  246. 6BQ5 pp with LM317 ccs
  247. maratz 7 clone
  248. Music Angel pre-amplifier - few modifications
  249. Transformer Questions (1st Amp Project)
  250. Morgan Jones and PS Bypass Caps

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