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  1. Luxman MQ70
  2. Valve pre-amp schematic help needed
  3. valves' world - tossie Japan
  4. 211 amp , recognize the circuit?
  5. Tube Preamp: Remedy For Digital Glare?
  6. Tubelab SSE without tube rectifier
  7. Counterpoint 7A
  8. Low Z Out Dual Triode
  9. Push Pull circuit - controlling sensitivity
  10. Moto 3 channel to Maggy 175
  11. PMillett Landfall heatsink
  12. lower the gain
  13. KT88?
  14. Sphinx Project Fourteen help wanted
  15. will this work and looking for suggestions
  16. Squeal on shutdown
  17. Newbie to SRPP and Tubes , 1 question.
  18. Question about interconnect transformers
  19. another toy - el84 PP class A
  20. Problem with biasing - no voltage drop on a cathode resistor
  21. EL84 PP current fluctuating
  22. Aikido Preamp Questions (again)
  23. Amp caused crack
  24. OPT performances
  25. Hammond 125ESE in 2A3 SE : better substitutions ?
  26. Headphone Impedance and headphone amplifier
  27. Could this tube be good for audio ?
  28. Output Transformer for SE / headphone amp
  29. pioneer sm-b200a
  30. 12AT7 Tubes ?
  31. Gold Lion kt77 bias help?
  32. Need some bias control help
  33. Lafayette LA-224a/b modernization?
  34. Need help completing vintage 6L6 amp
  35. Direct Russian equivilent for 5687, is there one ?
  36. Attenuation for 0.5dBs
  37. Dynaco ST-120 Impedance Concern Martin Logan
  38. Some 1626 Darling Amp Questions
  39. Choosing a SE 2A3 shematic : hum as a criteria...
  40. Rectifier question, voltage across diode.
  41. Angela simple 2A3
  42. Cathode follower - resistor calculations/software
  43. Desperately Seeking OPT Covers
  44. Modified Tube Cricket Amp Questions
  45. Best sounding DIY amp kits for 45, 2A3 or 300B
  46. Pentode's screen voltage/current
  47. KT88 Cathode Current Runaway/Oscillations?
  48. O'netics, Electra Print: anyone have both?
  49. How to maximize power transfer in tube circuit designs, damping is not the question!
  50. Inexpensive 2.5k primary SET OPT with 90mA+ DC bias rating?
  51. 4p1L Ultralinear
  52. RH300B 12W with 1% THD
  53. This is where the adventure begins
  54. 12AU7 pre rebuild suggestions
  55. Subwoofer Channel on Tube Amp
  56. Changing input tube from 12ax7 to 6AU6A on OTL project
  57. Yaqin MC5881a
  58. Humming Sound from tube amp
  59. Level Five 2A3 SE schematic : opinions ?
  60. My screwup = free PCBs...
  61. New stuff on the website: A2 buffer, isolated current sensor
  62. 12.6vDC Heaters, looking for a shortcut
  63. Fisher 80-AZ bias milliamps?
  64. Can shed some light on this EL 34 schematic diagram
  65. Solid State Rectifier in Dynaco Tube Amp
  66. Big chassis designs!
  67. 12ax7 LP
  68. plitron output w/ cfb usage ideas
  69. 390 ohm should have been 390k ohm
  70. Advice sought re what tube power amp
  71. EL34 SED Winged C Black Prints: original??
  72. OPTx from Ogonowski
  73. Aikido cathode follower (ACF) with 12au7
  74. Ampeg vt60 tri ax (did it really exist?)
  75. SEP EL-34 to 6L6GC?
  76. Volume Pot Spec
  77. My Tube Pre-Amp Picking up an AM radio station?
  78. Philips 6SN7 GTA & GTB
  79. ST-120 Problem With Rectifier Tube
  80. New Yaqin VK-2100
  81. Electronic parts and sub-zero temperature
  82. Bendix 6384 as EL34: Experience anyone?
  83. Audioresearch LS2B schematic needed
  84. input noise - too simple - but need explaination
  85. Plate voltage with/without tube (for fine tune bias adjustemnt)
  86. Using trimmers / potentiometers to adjust tube operating points
  87. KT88 SED winged C tolerance tall for quad
  88. Power Transformer Tolerances
  89. 12E1 Ultra Linear
  90. Comparison KT150 versus KT120
  91. 6sn7: GT GTA GTB sono differences for HIFI
  92. Audio Research LS5 Power Supply Problem
  93. Vintage grundig vs. new Yaqin. Advice?
  94. 5AR4 PSU
  95. What tube is this ?
  96. Need Schematic
  97. Budget PP Iron: Transcendar or Edcor?
  98. Yaqin MC-10L buzz
  99. Transformer buzzing when filament section is loaded
  100. Grid Stopper v Grid Leak on el84
  101. 2.5V Heater Tranformer-Best to Use One Per Channel?
  102. Amp: KT88 push-pull shunt feedback output via p-channel fet
  103. My biggest fear....
  104. I've made an awful mess...
  105. Any input for a tube noob's first attempt? Flea Watt 12b4, 6dj8, low B+
  106. HV scope use
  107. Kolster-Brandes er30
  108. Buzz that goes away when input grounded.
  109. Hovland HP-100 tube replacement
  110. Dynaco ST-120 Turn On Pop or Problem
  111. Grounding two channel preamp sharing a psu.
  112. Convert hybrid amp to pure tube output?
  113. Please Help me with this tubes
  114. resistor maximum voltage rating
  115. 211- 6e5p full amp. The first setps
  116. E810F and general pentodes design question
  117. Pop goes the bias cap.
  118. High Power Single Ended Triode, Design
  119. Yaqin MS-6V6 vs. Markhill MS-6V6
  120. Schematic please: Luxman MQ-70?
  121. Aikido tube preamp with Tortuga LDR volume control
  122. Type 37 tube preamp
  123. Figuring out a KT88 datasheet?
  124. Power supply 260V for tube preamp
  125. Aikido Tube with Tortuga volume control project
  126. Adding a pre out to amp
  127. One or two ECC82 for two channels (crosstalk)!
  128. Red Pilot (240)
  129. 77:1 Output Transformer Question
  130. Power transformer recommendation Kt88 SE and JE labs Riaa
  131. Tube output power for OPT calculation
  132. 6sn7 tube anode folower question?????
  133. Goldox 9300
  134. good quality/sounding preamp advice
  135. PL84 schematic question.
  136. YouTube Video: 12AX7 comparisons.
  137. How many volts ???
  138. Greetings all/ (newbie) Need Advice!
  139. Psud and Single Ended Amplifier
  140. Socket Combiniations
  141. From Potentiometer to Stepped Attenuator
  142. No need for bleed resistors on Fisher 90-T
  143. Sophia 300B+ carbon
  144. Capacitor Temperature
  145. PL519 amp SE
  146. C3g Headphone design - will this work?
  147. Luxman 2A3 amp SE
  148. Capacitor on Aikido Power Supply Sampling Circuit
  149. Well, what have I done now?
  150. Aikido CF cathode resistor?
  151. D3A - 6P45S/El519 SE "The staircase" my first h-end amplifier.
  152. SET Cathode Biased vs. Fixed Bias?
  153. JAN6418 pre-amp advise
  154. SOHA II amp tripping
  155. 6JN6 LTspice model?
  156. unusual output transformers, what are they for?
  157. Cheap power amp kit with 6N2 + 6P3
  158. KT88 AMP I'm not sure about power supply
  159. buzz from tubes
  160. Good Power Supply??
  161. HK guitar amp - help with repair
  162. Audio Research SP6C
  163. Junk Audio Project (pics)
  164. SE SV83 Paralled Tube Amplifer
  165. Hum in SVP preamp circuit
  166. Advice/tips on tube preamplifier wanted
  167. Transformer Windfall. Now what?
  168. I am being cautious - need to install a ground plug
  169. My first scratch build (6AQ5 SE)....
  170. Pop, Pop, Pop, Pop, Pop
  171. what is this valve? and what is it for??
  172. Lazarus cascade basic preamp
  173. Seperate Power Supply Chassis and Grounding
  174. How To Solder Tips and Tricks
  175. Another CD player tube mod, TDA1541 with transformers and triode cathode followers
  176. PCL86 - Worth a try?
  177. Audio use 3D6/1299 ?
  178. How HOT should a LM317 get?
  179. KT88 amp questions
  180. Restoring a Motorola HS-1048A amp
  181. Please look at this schematic and tells me what have went wrong
  182. Lacking bass response after re-cap
  183. Generate a negative bias voltage?
  184. hammond 369ex instead of 269ex
  185. Recapped a pair of monoblocks
  186. Top Secret!
  187. Toggle or Rotary Switch for Phono Inputs
  188. Flexible tube (or SS) electronic XO
  189. LAVATORY - Lamp Valve Transistor Hybrid (will this work?)
  190. Transformer revers use question
  191. Fixed bias, cathode feedback?
  192. spudnik, spudMiG ?
  193. I need the KT120 base dimensions
  194. Need help with chassis layout.
  195. tube amp ID ?
  196. GU50 filaments voltage!
  197. Does anybody have an RCA RS171 Schematic
  198. Opinions wanted: Low Z SE power supplies
  199. DC heaters, best way to bias ?
  200. Ignition coil as SE OPT
  201. Opt color code identification (Onetics)
  202. Drawback to Larger Capacity Output Transformer Than Required?
  203. Send me some pictures of your amps
  204. leak stereo 60
  205. B2 Spice V5.0
  206. Mains Fuse and Switch Best Practice
  207. Identify these vintage tube amp rivets
  208. RCA ORTHOPHONIC LMI-32216A manual copy needed
  209. Question on strange 6l6 schematic symbols
  210. Resistor value?
  211. Paper / plastic hybrid capacitor
  212. ST70 chassis polishing
  213. Octal to RCA
  214. KT120 plate load for 150+watts
  215. Need a copy of Aikido 5687 manual pdf
  216. Nutshell Raven Headphone amp with balanced I/O
  217. Bartolucci: beware of him !!!
  218. Finding plate resistance
  219. Pleides Tube only headphone amp
  220. I think I know what I want (seasoned advice)
  221. CCS filament supply vs inductors for DHT
  222. Cap outer foil low impedance help...
  223. Distorted low end SE micro amp
  224. LM3886 + ECC82/12AU7
  225. My LCR phono with HUM....
  226. Winter 2A3 SET project.
  227. 6BQ5 pp with LM317 ccs
  228. maratz 7 clone
  229. Music Angel pre-amplifier - few modifications
  230. Transformer Questions (1st Amp Project)
  231. Morgan Jones and PS Bypass Caps
  232. Ruby Tuby at 24V?
  233. Budget Iron for Low-Power SET
  234. Output transformer mounting questions
  235. 3c24 preamp?
  236. Newb Q - JE Simple 2A3 as Monoblocks
  237. Vacuum tube amp design
  238. Counterpoint SA7.1 circuit question
  239. Variable Gain Control Topology
  240. Unknown amplifier, anyone recognice it?
  241. Harman Kardon "The Lute" A-220 - Repair manual?
  242. G2 input grid 6DQ6 push pull
  243. Schade SE 6550
  244. Heathkit aa-23 fix up
  245. 6SN7 Line Stage w/ Tone Controls
  246. Octal Heaven??
  247. how do i reach Chris the georgetown technician?
  248. mu follower bootstrap cap value
  249. POLL: The Legendary Williamson Amp Modified By SY
  250. 5Y3 PSU Question

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