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  1. What to do with a problem Counterpoint SA-12
  2. 6Z9P Mu Stage max anode-cathode voltage
  3. Audio Innovations Series 500 parts
  4. Hagerman Trumpet phonostage
  5. PS design...success or failure?
  6. Kuba Serenade Stereo Console - Part III - Replacing all caps
  7. schematic of Knight KP-70 preamp or anyone having this amp?
  8. 6N6P Cathode Follower design value
  9. Radiotron 32W PP amp from RDH3
  10. Heater filament questions
  11. 46 in ultralinear mode
  12. help needed need transformer prim 230/110 sec 300v appr. 20ma +6,3v or 12,6v
  13. Output transformer confusion
  14. need amp schematic help
  15. reviving an old Randall RGT100
  16. lm317 and heater supply.
  17. BJT Voltage Bootstrap - SLCF
  18. Ideas for a cheap 200mA tube rectified PSU
  19. Need help with tube rectifier
  20. Tube or Circuit Noise?
  21. JE Labs (Angela instr.) : your favorite 2A3 schematic ?
  22. Crack the Code Amp build 1000 Watt Tube Amplifier
  23. 12E1 in fixed bias - too much current!
  24. CD-DVD player vs Notebook-usb soundcard sensitivity issue
  25. photo of Knight KP-70 preamplifier for missing component
  26. heater wear sign?
  27. Musical Fidelty X-10D Clone
  28. 815 amp
  29. Jorgen Schou 31,5 OT connection
  30. Is there such a thing....
  31. Tube Rectifiers and Common Grounds
  32. vt4c.com copper tube socket mounts
  33. 1 Ohm Tap Output tranformers?
  34. Voltage Specs For Heaters-Is 2.4V Good Enough?
  35. Aikido with 5842
  36. Luxman MQ70
  37. Valve pre-amp schematic help needed
  38. valves' world - tossie Japan
  39. 211 amp , recognize the circuit?
  40. Tube Preamp: Remedy For Digital Glare?
  41. Tubelab SSE without tube rectifier
  42. Counterpoint 7A
  43. Low Z Out Dual Triode
  44. Push Pull circuit - controlling sensitivity
  45. Moto 3 channel to Maggy 175
  46. PMillett Landfall heatsink
  47. lower the gain
  48. KT88?
  49. Sphinx Project Fourteen help wanted
  50. will this work and looking for suggestions
  51. Squeal on shutdown
  52. Newbie to SRPP and Tubes , 1 question.
  53. Question about interconnect transformers
  54. another toy - el84 PP class A
  55. Problem with biasing - no voltage drop on a cathode resistor
  56. EL84 PP current fluctuating
  57. Aikido Preamp Questions (again)
  58. Amp caused crack
  59. OPT performances
  60. Hammond 125ESE in 2A3 SE : better substitutions ?
  61. Headphone Impedance and headphone amplifier
  62. Could this tube be good for audio ?
  63. Output Transformer for SE / headphone amp
  64. pioneer sm-b200a
  65. 12AT7 Tubes ?
  66. Gold Lion kt77 bias help?
  67. Need some bias control help
  68. Lafayette LA-224a/b modernization?
  69. Need help completing vintage 6L6 amp
  70. Direct Russian equivilent for 5687, is there one ?
  71. Attenuation for 0.5dBs
  72. Dynaco ST-120 Impedance Concern Martin Logan
  73. Some 1626 Darling Amp Questions
  74. Choosing a SE 2A3 shematic : hum as a criteria...
  75. Rectifier question, voltage across diode.
  76. Angela simple 2A3
  77. Cathode follower - resistor calculations/software
  78. Desperately Seeking OPT Covers
  79. Modified Tube Cricket Amp Questions
  80. Best sounding DIY amp kits for 45, 2A3 or 300B
  81. Pentode's screen voltage/current
  82. KT88 Cathode Current Runaway/Oscillations?
  83. O'netics, Electra Print: anyone have both?
  84. How to maximize power transfer in tube circuit designs, damping is not the question!
  85. Inexpensive 2.5k primary SET OPT with 90mA+ DC bias rating?
  86. 4p1L Ultralinear
  87. RH300B 12W with 1% THD
  88. This is where the adventure begins
  89. 12AU7 pre rebuild suggestions
  90. Subwoofer Channel on Tube Amp
  91. Changing input tube from 12ax7 to 6AU6A on OTL project
  92. Yaqin MC5881a
  93. Humming Sound from tube amp
  94. Level Five 2A3 SE schematic : opinions ?
  95. My screwup = free PCBs...
  96. New stuff on the website: A2 buffer, isolated current sensor
  97. 12.6vDC Heaters, looking for a shortcut
  98. Fisher 80-AZ bias milliamps?
  99. Can shed some light on this EL 34 schematic diagram
  100. Solid State Rectifier in Dynaco Tube Amp
  101. Big chassis designs!
  102. 12ax7 LP
  103. plitron output w/ cfb usage ideas
  104. 390 ohm should have been 390k ohm
  105. Advice sought re what tube power amp
  106. EL34 SED Winged C Black Prints: original??
  107. OPTx from Ogonowski
  108. Aikido cathode follower (ACF) with 12au7
  109. Ampeg vt60 tri ax (did it really exist?)
  110. SEP EL-34 to 6L6GC?
  111. Volume Pot Spec
  112. My Tube Pre-Amp Picking up an AM radio station?
  113. Philips 6SN7 GTA & GTB
  114. ST-120 Problem With Rectifier Tube
  115. New Yaqin VK-2100
  116. Electronic parts and sub-zero temperature
  117. Bendix 6384 as EL34: Experience anyone?
  118. Audioresearch LS2B schematic needed
  119. input noise - too simple - but need explaination
  120. Plate voltage with/without tube (for fine tune bias adjustemnt)
  121. Using trimmers / potentiometers to adjust tube operating points
  122. KT88 SED winged C tolerance tall for quad
  123. Power Transformer Tolerances
  124. 12E1 Ultra Linear
  125. Comparison KT150 versus KT120
  126. 6sn7: GT GTA GTB sono differences for HIFI
  127. Audio Research LS5 Power Supply Problem
  128. Vintage grundig vs. new Yaqin. Advice?
  129. 5AR4 PSU
  130. What tube is this ?
  131. Need Schematic
  132. Budget PP Iron: Transcendar or Edcor?
  133. Yaqin MC-10L buzz
  134. Transformer buzzing when filament section is loaded
  135. Grid Stopper v Grid Leak on el84
  136. 2.5V Heater Tranformer-Best to Use One Per Channel?
  137. Amp: KT88 push-pull shunt feedback output via p-channel fet
  138. My biggest fear....
  139. I've made an awful mess...
  140. Any input for a tube noob's first attempt? Flea Watt 12b4, 6dj8, low B+
  141. HV scope use
  142. Kolster-Brandes er30
  143. Buzz that goes away when input grounded.
  144. Hovland HP-100 tube replacement
  145. Dynaco ST-120 Turn On Pop or Problem
  146. Grounding two channel preamp sharing a psu.
  147. Convert hybrid amp to pure tube output?
  148. Please Help me with this tubes
  149. resistor maximum voltage rating
  150. 211- 6e5p full amp. The first setps
  151. E810F and general pentodes design question
  152. Pop goes the bias cap.
  153. High Power Single Ended Triode, Design
  154. Yaqin MS-6V6 vs. Markhill MS-6V6
  155. Schematic please: Luxman MQ-70?
  156. Aikido tube preamp with Tortuga LDR volume control
  157. Type 37 tube preamp
  158. Figuring out a KT88 datasheet?
  159. Power supply 260V for tube preamp
  160. Aikido Tube with Tortuga volume control project
  161. Adding a pre out to amp
  162. One or two ECC82 for two channels (crosstalk)!
  163. Red Pilot (240)
  164. 77:1 Output Transformer Question
  165. Power transformer recommendation Kt88 SE and JE labs Riaa
  166. Tube output power for OPT calculation
  167. 6sn7 tube anode folower question?????
  168. Goldox 9300
  169. good quality/sounding preamp advice
  170. PL84 schematic question.
  171. YouTube Video: 12AX7 comparisons.
  172. How many volts ???
  173. Greetings all/ (newbie) Need Advice!
  174. Psud and Single Ended Amplifier
  175. Socket Combiniations
  176. From Potentiometer to Stepped Attenuator
  177. No need for bleed resistors on Fisher 90-T
  178. Sophia 300B+ carbon
  179. Capacitor Temperature
  180. PL519 amp SE
  181. C3g Headphone design - will this work?
  182. Luxman 2A3 amp SE
  183. Capacitor on Aikido Power Supply Sampling Circuit
  184. Well, what have I done now?
  185. Aikido CF cathode resistor?
  186. D3A - 6P45S/El519 SE "The staircase" my first h-end amplifier.
  187. SET Cathode Biased vs. Fixed Bias?
  188. JAN6418 pre-amp advise
  189. SOHA II amp tripping
  190. 6JN6 LTspice model?
  191. unusual output transformers, what are they for?
  192. Cheap power amp kit with 6N2 + 6P3
  193. KT88 AMP I'm not sure about power supply
  194. buzz from tubes
  195. Good Power Supply??
  196. HK guitar amp - help with repair
  197. Audio Research SP6C
  198. Junk Audio Project (pics)
  199. SE SV83 Paralled Tube Amplifer
  200. Hum in SVP preamp circuit
  201. Advice/tips on tube preamplifier wanted
  202. Transformer Windfall. Now what?
  203. I am being cautious - need to install a ground plug
  204. My first scratch build (6AQ5 SE)....
  205. Pop, Pop, Pop, Pop, Pop
  206. what is this valve? and what is it for??
  207. Lazarus cascade basic preamp
  208. Seperate Power Supply Chassis and Grounding
  209. How To Solder Tips and Tricks
  210. Another CD player tube mod, TDA1541 with transformers and triode cathode followers
  211. PCL86 - Worth a try?
  212. Audio use 3D6/1299 ?
  213. How HOT should a LM317 get?
  214. KT88 amp questions
  215. Restoring a Motorola HS-1048A amp
  216. Please look at this schematic and tells me what have went wrong
  217. Lacking bass response after re-cap
  218. Generate a negative bias voltage?
  219. hammond 369ex instead of 269ex
  220. Recapped a pair of monoblocks
  221. Top Secret!
  222. Toggle or Rotary Switch for Phono Inputs
  223. Flexible tube (or SS) electronic XO
  224. LAVATORY - Lamp Valve Transistor Hybrid (will this work?)
  225. Transformer revers use question
  226. Fixed bias, cathode feedback?
  227. spudnik, spudMiG ?
  228. I need the KT120 base dimensions
  229. Need help with chassis layout.
  230. tube amp ID ?
  231. GU50 filaments voltage!
  232. Does anybody have an RCA RS171 Schematic
  233. Opinions wanted: Low Z SE power supplies
  234. DC heaters, best way to bias ?
  235. Ignition coil as SE OPT
  236. Opt color code identification (Onetics)
  237. Drawback to Larger Capacity Output Transformer Than Required?
  238. Send me some pictures of your amps
  239. leak stereo 60
  240. B2 Spice V5.0
  241. Mains Fuse and Switch Best Practice
  242. Identify these vintage tube amp rivets
  243. RCA ORTHOPHONIC LMI-32216A manual copy needed
  244. Question on strange 6l6 schematic symbols
  245. Resistor value?
  246. Paper / plastic hybrid capacitor
  247. ST70 chassis polishing
  248. Octal to RCA
  249. KT120 plate load for 150+watts
  250. Need a copy of Aikido 5687 manual pdf

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