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  1. Using Choke in Choke Input Power Supply ?
  2. 6550 wrong high bias...
  3. Floating Bridged CCS Loaded P-P Tube Amp
  4. What to do with a problem Counterpoint SA-12
  5. 6Z9P Mu Stage max anode-cathode voltage
  6. Audio Innovations Series 500 parts
  7. Hagerman Trumpet phonostage
  8. PS design...success or failure?
  9. Kuba Serenade Stereo Console - Part III - Replacing all caps
  10. schematic of Knight KP-70 preamp or anyone having this amp?
  11. 6N6P Cathode Follower design value
  12. Radiotron 32W PP amp from RDH3
  13. Heater filament questions
  14. 46 in ultralinear mode
  15. help needed need transformer prim 230/110 sec 300v appr. 20ma +6,3v or 12,6v
  16. Output transformer confusion
  17. need amp schematic help
  18. lm317 and heater supply.
  19. BJT Voltage Bootstrap - SLCF
  20. Ideas for a cheap 200mA tube rectified PSU
  21. Need help with tube rectifier
  22. Tube or Circuit Noise?
  23. JE Labs (Angela instr.) : your favorite 2A3 schematic ?
  24. Crack the Code Amp build 1000 Watt Tube Amplifier
  25. 12E1 in fixed bias - too much current!
  26. CD-DVD player vs Notebook-usb soundcard sensitivity issue
  27. photo of Knight KP-70 preamplifier for missing component
  28. heater wear sign?
  29. Musical Fidelty X-10D Clone
  30. 815 amp
  31. Jorgen Schou 31,5 OT connection
  32. Is there such a thing....
  33. Tube Rectifiers and Common Grounds
  34. vt4c.com copper tube socket mounts
  35. 1 Ohm Tap Output tranformers?
  36. Voltage Specs For Heaters-Is 2.4V Good Enough?
  37. Aikido with 5842
  38. Luxman MQ70
  39. Valve pre-amp schematic help needed
  40. valves' world - tossie Japan
  41. 211 amp , recognize the circuit?
  42. Tube Preamp: Remedy For Digital Glare?
  43. Counterpoint 7A
  44. Low Z Out Dual Triode
  45. Push Pull circuit - controlling sensitivity
  46. Moto 3 channel to Maggy 175
  47. PMillett Landfall heatsink
  48. lower the gain
  49. KT88?
  50. Sphinx Project Fourteen help wanted
  51. will this work and looking for suggestions
  52. Squeal on shutdown
  53. Newbie to SRPP and Tubes , 1 question.
  54. Question about interconnect transformers
  55. another toy - el84 PP class A
  56. Problem with biasing - no voltage drop on a cathode resistor
  57. EL84 PP current fluctuating
  58. Aikido Preamp Questions (again)
  59. Amp caused crack
  60. OPT performances
  61. Hammond 125ESE in 2A3 SE : better substitutions ?
  62. Headphone Impedance and headphone amplifier
  63. Could this tube be good for audio ?
  64. Output Transformer for SE / headphone amp
  65. pioneer sm-b200a
  66. 12AT7 Tubes ?
  67. Gold Lion kt77 bias help?
  68. Need some bias control help
  69. Lafayette LA-224a/b modernization?
  70. Need help completing vintage 6L6 amp
  71. Direct Russian equivilent for 5687, is there one ?
  72. Attenuation for 0.5dBs
  73. Dynaco ST-120 Impedance Concern Martin Logan
  74. Some 1626 Darling Amp Questions
  75. Choosing a SE 2A3 shematic : hum as a criteria...
  76. Rectifier question, voltage across diode.
  77. Angela simple 2A3
  78. Cathode follower - resistor calculations/software
  79. Desperately Seeking OPT Covers
  80. Modified Tube Cricket Amp Questions
  81. Best sounding DIY amp kits for 45, 2A3 or 300B
  82. Pentode's screen voltage/current
  83. KT88 Cathode Current Runaway/Oscillations?
  84. O'netics, Electra Print: anyone have both?
  85. How to maximize power transfer in tube circuit designs, damping is not the question!
  86. Inexpensive 2.5k primary SET OPT with 90mA+ DC bias rating?
  87. 4p1L Ultralinear
  88. RH300B 12W with 1% THD
  89. This is where the adventure begins
  90. 12AU7 pre rebuild suggestions
  91. Subwoofer Channel on Tube Amp
  92. Changing input tube from 12ax7 to 6AU6A on OTL project
  93. Yaqin MC5881a
  94. Humming Sound from tube amp
  95. Level Five 2A3 SE schematic : opinions ?
  96. My screwup = free PCBs...
  97. New stuff on the website: A2 buffer, isolated current sensor
  98. 12.6vDC Heaters, looking for a shortcut
  99. Fisher 80-AZ bias milliamps?
  100. Can shed some light on this EL 34 schematic diagram
  101. Solid State Rectifier in Dynaco Tube Amp
  102. Big chassis designs!
  103. 12ax7 LP
  104. plitron output w/ cfb usage ideas
  105. 390 ohm should have been 390k ohm
  106. Advice sought re what tube power amp
  107. EL34 SED Winged C Black Prints: original??
  108. OPTx from Ogonowski
  109. Aikido cathode follower (ACF) with 12au7
  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. Kolster-Brandes er30
  142. Buzz that goes away when input grounded.
  143. Hovland HP-100 tube replacement
  144. Dynaco ST-120 Turn On Pop or Problem
  145. Grounding two channel preamp sharing a psu.
  146. Convert hybrid amp to pure tube output?
  147. Please Help me with this tubes
  148. 211- 6e5p full amp. The first setps
  149. E810F and general pentodes design question
  150. Pop goes the bias cap.
  151. High Power Single Ended Triode, Design
  152. Yaqin MS-6V6 vs. Markhill MS-6V6
  153. Schematic please: Luxman MQ-70?
  154. Aikido tube preamp with Tortuga LDR volume control
  155. Type 37 tube preamp
  156. Figuring out a KT88 datasheet?
  157. Power supply 260V for tube preamp
  158. Aikido Tube with Tortuga volume control project
  159. Adding a pre out to amp
  160. One or two ECC82 for two channels (crosstalk)!
  161. Red Pilot (240)
  162. 77:1 Output Transformer Question
  163. Power transformer recommendation Kt88 SE and JE labs Riaa
  164. Tube output power for OPT calculation
  165. 6sn7 tube anode folower question?????
  166. Goldox 9300
  167. good quality/sounding preamp advice
  168. PL84 schematic question.
  169. YouTube Video: 12AX7 comparisons.
  170. How many volts ???
  171. Greetings all/ (newbie) Need Advice!
  172. Psud and Single Ended Amplifier
  173. Socket Combiniations
  174. From Potentiometer to Stepped Attenuator
  175. No need for bleed resistors on Fisher 90-T
  176. Sophia 300B+ carbon
  177. PL519 amp SE
  178. C3g Headphone design - will this work?
  179. Luxman 2A3 amp SE
  180. Capacitor on Aikido Power Supply Sampling Circuit
  181. Well, what have I done now?
  182. Aikido CF cathode resistor?
  183. D3A - 6P45S/El519 SE "The staircase" my first h-end amplifier.
  184. SET Cathode Biased vs. Fixed Bias?
  185. JAN6418 pre-amp advise
  186. SOHA II amp tripping
  187. 6JN6 LTspice model?
  188. unusual output transformers, what are they for?
  189. Cheap power amp kit with 6N2 + 6P3
  190. KT88 AMP I'm not sure about power supply
  191. buzz from tubes
  192. Good Power Supply??
  193. Audio Research SP6C
  194. Junk Audio Project (pics)
  195. SE SV83 Paralled Tube Amplifer
  196. Hum in SVP preamp circuit
  197. Advice/tips on tube preamplifier wanted
  198. Transformer Windfall. Now what?
  199. I am being cautious - need to install a ground plug
  200. My first scratch build (6AQ5 SE)....
  201. Pop, Pop, Pop, Pop, Pop
  202. what is this valve? and what is it for??
  203. Lazarus cascade basic preamp
  204. Seperate Power Supply Chassis and Grounding
  205. How To Solder Tips and Tricks
  206. Another CD player tube mod, TDA1541 with transformers and triode cathode followers
  207. PCL86 - Worth a try?
  208. Audio use 3D6/1299 ?
  209. How HOT should a LM317 get?
  210. KT88 amp questions
  211. Restoring a Motorola HS-1048A amp
  212. Please look at this schematic and tells me what have went wrong
  213. Lacking bass response after re-cap
  214. Generate a negative bias voltage?
  215. hammond 369ex instead of 269ex
  216. Recapped a pair of monoblocks
  217. Top Secret!
  218. Toggle or Rotary Switch for Phono Inputs
  219. Flexible tube (or SS) electronic XO
  220. LAVATORY - Lamp Valve Transistor Hybrid (will this work?)
  221. Transformer revers use question
  222. Fixed bias, cathode feedback?
  223. spudnik, spudMiG ?
  224. I need the KT120 base dimensions
  225. Need help with chassis layout.
  226. tube amp ID ?
  227. GU50 filaments voltage!
  228. Does anybody have an RCA RS171 Schematic
  229. Opinions wanted: Low Z SE power supplies
  230. DC heaters, best way to bias ?
  231. Ignition coil as SE OPT
  232. Opt color code identification (Onetics)
  233. Drawback to Larger Capacity Output Transformer Than Required?
  234. Send me some pictures of your amps
  235. leak stereo 60
  236. B2 Spice V5.0
  237. Mains Fuse and Switch Best Practice
  238. Identify these vintage tube amp rivets
  239. RCA ORTHOPHONIC LMI-32216A manual copy needed
  240. Question on strange 6l6 schematic symbols
  241. Resistor value?
  242. ST70 chassis polishing
  243. Octal to RCA
  244. KT120 plate load for 150+watts
  245. Need a copy of Aikido 5687 manual pdf
  246. Nutshell Raven Headphone amp with balanced I/O
  247. Bartolucci: beware of him !!!
  248. Finding plate resistance
  249. Pleides Tube only headphone amp
  250. I think I know what I want (seasoned advice)

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