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

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