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  1. APPJ PA0901A / Miniwatt N3 schematics
  2. APPJ PA0901A() schematics
  3. Help Needed: Lower Gain on a Tube Amp?
  4. Help: Hickok Western Electric KS-15750 Calibration
  5. Mullard ecc82 12au7 code help
  6. Wondering if I can use this XFMR to power two NYD 6SN7 1 bottle pres
  7. ST-70 Power Transformer
  8. Help Identifying a Tube - Westinghouse 12AX7A
  9. An incredible collection!
  10. Using only half of a stereo PP amp
  11. Alternate Electrolytic Caps for SimpleSE (and others)
  12. Low voltage vs. High Voltage Preamp.
  13. 6J6 Headphone hybrid amplifer?
  14. Hybrid headphone amp.....
  15. Please help with hum problem..
  16. Dead Audio Innovations Series 500
  17. Problems with E88CC / 6922 drawing grid current on power-up
  18. H.J.Leak TL12 "point one"
  19. Tubecad hybrird feedforward feedback shunt regulator
  20. 6v6 SE kit - any good?
  21. DBX 576 complete upgrade. Advices?
  22. help !! 45 tube
  23. 6P45S PP, simulation frustration.
  24. AMC CVT 3030 one more try - or dumpster
  25. Help for 211 HV PSU with damper diodes
  26. Flexible supply idea
  27. what range speaker used 2x 18watt or 2x 10 watt on 18 watts amp
  28. Equalizer on EL84 project
  29. parallel single-ended 12W6
  30. help improving/refurb a Fisher k-10 Tube spring reverb
  31. S.E.X. amp + Impedance switch build problems.
  32. problem with speaker
  33. EC80 as preamp tube.
  34. 6CJ3 Rectifier Connection Question ?
  35. AC Filament Voltage Question ?
  36. My new GU50 SE (all pentode)
  37. Ming Da MC-3R Schematics
  38. 12B4 PSE build thread
  39. Looking for options for 4 volt heater
  40. Help me,Art Audio Concerto
  41. heathkit t3 12sh7 tube
  42. PSU dimensioning for pre-amp
  43. Old ceramic dogbone capacitor color codes
  44. Williamson preamp identification help wanted
  45. Adequate switch for UL-triode-pentode
  46. pl500 based integrated OTL amplifier
  47. Capacitor dielectric - high impedance headphones
  48. REQUEST FOR OPINIONS
  49. Mysterious LCR phono preamp
  50. Eimac 100TL Output Transformers and Bias Point ?
  51. Tube deterioration
  52. Heathkit XO-1 power cords
  53. EF86 Push-Pull "power"-amp
  54. Transformers!?
  55. Weird ground loop problem
  56. Re-caping Cayin A70-T
  57. A3 attenuator help for an Aikido line amp
  58. Driver Tube Power Supply Question ?
  59. Line Stage vs. Phase Inverter - 12A*7
  60. Intermittent Buzz Decware Zen SE84Bged
  61. Tamura F2011/el34 x 4
  62. E88CC/6922 battery supply
  63. Aikido 9-pin all-in-1 headphone amp problem
  64. Filament Transformer Question ?
  65. Load Resistance, etc., chart for Class A push pull 6L6s?
  66. Question about preamp, boost and line-stage
  67. help please
  68. Practical phase inverter article
  69. Tube vs. Jfet Preamp for Dynaco ST-35 tube power amp
  70. Rio W-41 no sound
  71. Help: TDA1541A DAC Output To Tube Gainstage
  72. Pieter's take on an all DHT headphone amplifier.
  73. toroidal chokes
  74. Truly Silly Transformer Question
  75. Elementary resistance question
  76. Russian 310A + 300B
  77. 1959 RCA tube amplifier needs help
  78. What's going on?
  79. Aikido 9-pin All-in-one Testing question
  80. Gyrator in Tail of LTP
  81. tubemaster EL84
  82. Silly transformer question
  83. Marant 8b bias meter
  84. ElectroTone OrganMate spring reverb - mod suggestions?
  85. Opera Consonance resitor question ?
  86. ADI's Double Dyna
  87. DuMont Stereo Tube Console late 50's - What to do?
  88. No Sound from Magnavox EL 1484-1 amp/phono
  89. Elevated Heater Question
  90. 6P45S/EL509 input capacitance in triode mode
  91. 6E6p-e Little Tiny Wire
  92. another aikido ?
  93. NOS 6P3S-e or cheap new 5881? Identify this tube..
  94. Contan Audio from Melbourne Aus, any info?
  95. Loctal Base Post
  96. Timber amp with solid copper plate as earth and ground plane
  97. Dynaco ST70 - Which tubes do you like?
  98. 6SL7 in parallel driving 6550
  99. Will this work as a heater for 300b?
  100. Tube grid resistance for 6P45S, fine?
  101. Akido help pls
  102. BEARD P101 information
  103. Got some 6n3c-e (6p3s-e)with blank bulb?
  104. Graaf GM-20
  105. medium power OTL circlotron amplifier
  106. Help me identity this amp
  107. Hajdinjak preamp + 2x mono tube amp -What to do?
  108. Moscode 600 Noisy Fan
  109. component reduction in signal chain
  110. Aikido with Stax
  111. 'High power' shunt regulator
  112. Help need on Xindak XA3200MII hybrid pre-amplifier
  113. ideas for tube burn in / bias match station
  114. KT120 triode operation single stage amp
  115. Question regarding 7199 Tube wiring
  116. Why do modern PP OPTs have 16 Ohm taps?
  117. 10M45 current source
  118. 12bh7 in place of ecc82
  119. High voltage winding no center tap?
  120. Marantz 8b recap
  121. Pair Quad II in all original condition... restore or sell
  122. Where to find tube designers for hire?
  123. 10M45S problem
  124. 300B Load Line and Bias?
  125. Looking for little help with Glassware Janus shunt reg
  126. Quick question about grounding
  127. Source for 6jg5 or equivalent in Europe
  128. Need your help: Change from el34 to 6550 ends in a desaster
  129. conn el 6026 tube amp schematic for hifi stereo
  130. GE 211 "flash" question
  131. Learned something (the hard way) about mica capacitors
  132. Aikido octal floating output
  133. Screened cable for rewiring valve amp
  134. Fault developed, producing static noise
  135. Tubelab SE buzz and crackle
  136. EL34+Ecc83 amp hum
  137. Gold plated Dynaco ST-70 for $3k
  138. Preamp noise level ?
  139. KOSS A1220 - Vintage Tube Headphone Amp - Diagnose and Mod questions...
  140. Rectifier tube cathode and heater
  141. testing voltage on tube filament, without the tube
  142. New semi-custom metal chassis manufacturer
  143. 55 WPC 1625 Mono Block Amps
  144. Masco C-10 Mic/Phono Amp
  145. New driver stage for dynaco mk3
  146. Power Transformer Issue
  147. Marantz 8B
  148. Safety questions
  149. Step Attenuator
  150. amplifier output impedance measurement
  151. Regulated Vs Non-regulated linear Power Supply
  152. Single RIAA passive eq design for differential DC coupled tube circuit
  153. Amp to Drive Lowther DX3's in Rear Loaded Horn
  154. Anyone know what's going on with Antek?
  155. Sources of 120hz hum?
  156. make adapter from 6n2p to 12ax7
  157. DC coupling with a choke?
  158. help with hum 12ax7 preamp
  159. Signal->crossover->3 amps->speaker
  160. I want to build an inexpensive EL 84 integrated amp with a phono section.
  161. Scott17 KT88 SE Tube Amp Build Log
  162. heater currents
  163. 300B Orientation so logo faces forward
  164. Leak stereo 20
  165. Suggestion: Output tube in SET amp for midbass frequency
  166. Monster Hammond Output XFMRs
  167. 6A3 / 6B4G Design
  168. DC7 MK3 up and running.
  169. Marrantz Model 9 Transformer Buy
  170. 6N2P/6Н2П low plate current increases noise?
  171. first tube amp
  172. rogers cadet 111 or Quad 11
  173. New FM-3 Motherboard
  174. 12ax7(ecc83) and 6n2p 12ax7...........differents??
  175. Heater supply
  176. Very upgraded ST-70 kit/build w/ 6550 tubes
  177. Marantz 8b Electrolytics
  178. How biasing mA in tubes
  179. PSU id and help (psu designer ii)
  180. The all DHT SET Headphone Amp
  181. Assistance with rectifiers in PSUD
  182. Music Angel XD 500 MkII Bias setting
  183. Magnoval
  184. S.E.X. amp plate chokes replacements
  185. Ampex 600 Questions
  186. Antek out of business until April
  187. SE EL34 in triode schematic
  188. Sylvania Console?
  189. Can output transfomers be pick and mixed?
  190. i have just notice that my yaqin 2100 vk bias settings is all over the place.
  191. Preamp Design Review Request
  192. Red Plate Of Doom
  193. LED cathode bias noise issue
  194. PCL86 se amplif.
  195. Is This a good Amplier?
  196. Question: Class AB Hybrid with small signal triode and Power Mosfet output?
  197. Contemporary Transformer for Doubler
  198. The volume pot - The hidden villain of preamp
  199. Heathkit EUW-15 Univ. Power Supply (Tube)
  200. diamond cathode tubes
  201. 6146B
  202. ef86 based preamp
  203. 12FQ7 Why and will it be shortage?
  204. Trouble w/ Maida regulator bias supply
  205. impedance calculations
  206. calibrate stark 8-77?
  207. EZLoad Dummy Load
  208. Best kit for a rookie tube builder
  209. schematic question? 805 feedback
  210. 6av5ga distortion spectrum
  211. Single stage line with anode-cathode feedback
  212. VNAV' SUMO Contest 2011
  213. Direct heated triode (dht) cathode bypass: different options
  214. choice of driver for RS 241
  215. Wiring up 3 6.3 Volt Heaters to a 12V supply
  216. Adding LED's to my tubes4hifi sp6 preamp
  217. Stripped down HK A-300
  218. Westrex 2332A amplifiers
  219. Leak st20
  220. Where could I find these sockets???
  221. Hammond L-112
  222. 4-pin tube socket spring clips
  223. Quad FM1 tuner, could be in wrong section
  224. My first tube amp and speaker build I'm loven it
  225. 211 IT amp, battery vs fixed bias
  226. 300B Tube Failure
  227. how to see if a Mullard 12ax7 reissue is long or short plate
  228. Can capacitors, how do they fail?
  229. Long Preamp to Power Amp Cable Lengths
  230. My time at Hovland - HP-100 Lore
  231. hybrid quad design
  232. TooB NooB: Options?
  233. Preamp grounding
  234. Express PCB and POV-ray
  235. Looking for circuit of SE amp. for 4D32
  236. 865 tetrode in triode mode...WOW !
  237. MP-2A preamp
  238. Is a 7 watt per channel amp enough
  239. Help: Interstage Transformer for 7788 (E810F) Tube in Triode ?
  240. Transformers
  241. Pentode curves for GU 50 SE amp with 700V B+
  242. Valve op-amp pre ?
  243. Use only half of OPT secondary?
  244. On/Off cycling
  245. Tube operating points help
  246. OTL Heater Questions
  247. tube output question
  248. RIAA LCR Mythos
  249. first tube amp
  250. M135 retubing and eventual modification

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