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  1. 12E1 in fixed bias - too much current!
  2. CD-DVD player vs Notebook-usb soundcard sensitivity issue
  3. photo of Knight KP-70 preamplifier for missing component
  4. heater wear sign?
  5. Musical Fidelty X-10D Clone
  6. 815 amp
  7. Jorgen Schou 31,5 OT connection
  8. Is there such a thing....
  9. Tube Rectifiers and Common Grounds
  10. vt4c.com copper tube socket mounts
  11. 1 Ohm Tap Output tranformers?
  12. Voltage Specs For Heaters-Is 2.4V Good Enough?
  13. Aikido with 5842
  14. Luxman MQ70
  15. Valve pre-amp schematic help needed
  16. valves' world - tossie Japan
  17. 211 amp , recognize the circuit?
  18. Tube Preamp: Remedy For Digital Glare?
  19. Tubelab SSE without tube rectifier
  20. Counterpoint 7A
  21. Low Z Out Dual Triode
  22. Push Pull circuit - controlling sensitivity
  23. Moto 3 channel to Maggy 175
  24. PMillett Landfall heatsink
  25. lower the gain
  26. KT88?
  27. Sphinx Project Fourteen help wanted
  28. will this work and looking for suggestions
  29. Squeal on shutdown
  30. Newbie to SRPP and Tubes , 1 question.
  31. Question about interconnect transformers
  32. another toy - el84 PP class A
  33. Problem with biasing - no voltage drop on a cathode resistor
  34. EL84 PP current fluctuating
  35. Aikido Preamp Questions (again)
  36. Amp caused crack
  37. OPT performances
  38. Hammond 125ESE in 2A3 SE : better substitutions ?
  39. Headphone Impedance and headphone amplifier
  40. Could this tube be good for audio ?
  41. Output Transformer for SE / headphone amp
  42. pioneer sm-b200a
  43. 12AT7 Tubes ?
  44. Gold Lion kt77 bias help?
  45. Need some bias control help
  46. Lafayette LA-224a/b modernization?
  47. Need help completing vintage 6L6 amp
  48. Direct Russian equivilent for 5687, is there one ?
  49. Attenuation for 0.5dBs
  50. Dynaco ST-120 Impedance Concern Martin Logan
  51. Some 1626 Darling Amp Questions
  52. Choosing a SE 2A3 shematic : hum as a criteria...
  53. Rectifier question, voltage across diode.
  54. Angela simple 2A3
  55. Cathode follower - resistor calculations/software
  56. Desperately Seeking OPT Covers
  57. Modified Tube Cricket Amp Questions
  58. Best sounding DIY amp kits for 45, 2A3 or 300B
  59. Pentode's screen voltage/current
  60. KT88 Cathode Current Runaway/Oscillations?
  61. O'netics, Electra Print: anyone have both?
  62. How to maximize power transfer in tube circuit designs, damping is not the question!
  63. Inexpensive 2.5k primary SET OPT with 90mA+ DC bias rating?
  64. 4p1L Ultralinear
  65. RH300B 12W with 1% THD
  66. This is where the adventure begins
  67. 12AU7 pre rebuild suggestions
  68. Subwoofer Channel on Tube Amp
  69. Changing input tube from 12ax7 to 6AU6A on OTL project
  70. Yaqin MC5881a
  71. Humming Sound from tube amp
  72. Level Five 2A3 SE schematic : opinions ?
  73. My screwup = free PCBs...
  74. New stuff on the website: A2 buffer, isolated current sensor
  75. 12.6vDC Heaters, looking for a shortcut
  76. Fisher 80-AZ bias milliamps?
  77. Can shed some light on this EL 34 schematic diagram
  78. Solid State Rectifier in Dynaco Tube Amp
  79. Big chassis designs!
  80. 12ax7 LP
  81. plitron output w/ cfb usage ideas
  82. 390 ohm should have been 390k ohm
  83. Advice sought re what tube power amp
  84. EL34 SED Winged C Black Prints: original??
  85. OPTx from Ogonowski
  86. Aikido cathode follower (ACF) with 12au7
  87. Ampeg vt60 tri ax (did it really exist?)
  88. SEP EL-34 to 6L6GC?
  89. Volume Pot Spec
  90. My Tube Pre-Amp Picking up an AM radio station?
  91. Philips 6SN7 GTA & GTB
  92. ST-120 Problem With Rectifier Tube
  93. New Yaqin VK-2100
  94. Electronic parts and sub-zero temperature
  95. Bendix 6384 as EL34: Experience anyone?
  96. Audioresearch LS2B schematic needed
  97. input noise - too simple - but need explaination
  98. Plate voltage with/without tube (for fine tune bias adjustemnt)
  99. Using trimmers / potentiometers to adjust tube operating points
  100. KT88 SED winged C tolerance tall for quad
  101. Power Transformer Tolerances
  102. 12E1 Ultra Linear
  103. Comparison KT150 versus KT120
  104. 6sn7: GT GTA GTB sono differences for HIFI
  105. Audio Research LS5 Power Supply Problem
  106. Vintage grundig vs. new Yaqin. Advice?
  107. 5AR4 PSU
  108. What tube is this ?
  109. Need Schematic
  110. Budget PP Iron: Transcendar or Edcor?
  111. Yaqin MC-10L buzz
  112. Transformer buzzing when filament section is loaded
  113. Grid Stopper v Grid Leak on el84
  114. 2.5V Heater Tranformer-Best to Use One Per Channel?
  115. Amp: KT88 push-pull shunt feedback output via p-channel fet
  116. My biggest fear....
  117. I've made an awful mess...
  118. Any input for a tube noob's first attempt? Flea Watt 12b4, 6dj8, low B+
  119. HV scope use
  120. Kolster-Brandes er30
  121. Buzz that goes away when input grounded.
  122. Hovland HP-100 tube replacement
  123. Dynaco ST-120 Turn On Pop or Problem
  124. Grounding two channel preamp sharing a psu.
  125. Convert hybrid amp to pure tube output?
  126. Please Help me with this tubes
  127. resistor maximum voltage rating
  128. 211- 6e5p full amp. The first setps
  129. E810F and general pentodes design question
  130. Pop goes the bias cap.
  131. High Power Single Ended Triode, Design
  132. Yaqin MS-6V6 vs. Markhill MS-6V6
  133. Schematic please: Luxman MQ-70?
  134. Aikido tube preamp with Tortuga LDR volume control
  135. Type 37 tube preamp
  136. Figuring out a KT88 datasheet?
  137. Power supply 260V for tube preamp
  138. Aikido Tube with Tortuga volume control project
  139. Adding a pre out to amp
  140. One or two ECC82 for two channels (crosstalk)!
  141. Red Pilot (240)
  142. 77:1 Output Transformer Question
  143. Power transformer recommendation Kt88 SE and JE labs Riaa
  144. Tube output power for OPT calculation
  145. 6sn7 tube anode folower question?????
  146. Goldox 9300
  147. good quality/sounding preamp advice
  148. PL84 schematic question.
  149. YouTube Video: 12AX7 comparisons.
  150. How many volts ???
  151. Greetings all/ (newbie) Need Advice!
  152. Psud and Single Ended Amplifier
  153. Socket Combiniations
  154. From Potentiometer to Stepped Attenuator
  155. No need for bleed resistors on Fisher 90-T
  156. Sophia 300B+ carbon
  157. Capacitor Temperature
  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. HK guitar amp - help with repair
  175. Audio Research SP6C
  176. Junk Audio Project (pics)
  177. SE SV83 Paralled Tube Amplifer
  178. Hum in SVP preamp circuit
  179. Advice/tips on tube preamplifier wanted
  180. Transformer Windfall. Now what?
  181. I am being cautious - need to install a ground plug
  182. My first scratch build (6AQ5 SE)....
  183. Pop, Pop, Pop, Pop, Pop
  184. what is this valve? and what is it for??
  185. Lazarus cascade basic preamp
  186. Seperate Power Supply Chassis and Grounding
  187. How To Solder Tips and Tricks
  188. Another CD player tube mod, TDA1541 with transformers and triode cathode followers
  189. PCL86 - Worth a try?
  190. Audio use 3D6/1299 ?
  191. How HOT should a LM317 get?
  192. KT88 amp questions
  193. Restoring a Motorola HS-1048A amp
  194. Please look at this schematic and tells me what have went wrong
  195. Lacking bass response after re-cap
  196. Generate a negative bias voltage?
  197. hammond 369ex instead of 269ex
  198. Recapped a pair of monoblocks
  199. Top Secret!
  200. Toggle or Rotary Switch for Phono Inputs
  201. Flexible tube (or SS) electronic XO
  202. LAVATORY - Lamp Valve Transistor Hybrid (will this work?)
  203. Transformer revers use question
  204. Fixed bias, cathode feedback?
  205. spudnik, spudMiG ?
  206. I need the KT120 base dimensions
  207. Need help with chassis layout.
  208. tube amp ID ?
  209. GU50 filaments voltage!
  210. Does anybody have an RCA RS171 Schematic
  211. Opinions wanted: Low Z SE power supplies
  212. DC heaters, best way to bias ?
  213. Ignition coil as SE OPT
  214. Opt color code identification (Onetics)
  215. Drawback to Larger Capacity Output Transformer Than Required?
  216. Send me some pictures of your amps
  217. leak stereo 60
  218. B2 Spice V5.0
  219. Mains Fuse and Switch Best Practice
  220. Identify these vintage tube amp rivets
  221. RCA ORTHOPHONIC LMI-32216A manual copy needed
  222. Question on strange 6l6 schematic symbols
  223. Resistor value?
  224. Paper / plastic hybrid capacitor
  225. ST70 chassis polishing
  226. Octal to RCA
  227. KT120 plate load for 150+watts
  228. Need a copy of Aikido 5687 manual pdf
  229. Nutshell Raven Headphone amp with balanced I/O
  230. Bartolucci: beware of him !!!
  231. Finding plate resistance
  232. Pleides Tube only headphone amp
  233. I think I know what I want (seasoned advice)
  234. CCS filament supply vs inductors for DHT
  235. Cap outer foil low impedance help...
  236. Distorted low end SE micro amp
  237. LM3886 + ECC82/12AU7
  238. My LCR phono with HUM....
  239. Winter 2A3 SET project.
  240. 6BQ5 pp with LM317 ccs
  241. maratz 7 clone
  242. Music Angel pre-amplifier - few modifications
  243. Transformer Questions (1st Amp Project)
  244. Morgan Jones and PS Bypass Caps
  245. Ruby Tuby at 24V?
  246. Budget Iron for Low-Power SET
  247. Output transformer mounting questions
  248. 3c24 preamp?
  249. Newb Q - JE Simple 2A3 as Monoblocks
  250. Vacuum tube amp design

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