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  1. Tube Amplifier Builder's Competition
  2. testing tubes for shorts
  3. Tube kits
  4. GU29 PP Amplifier
  5. 1625 tube radio?
  6. Measuring volts on an unloaded PSU secondary
  7. Suggest a preamp project for me.
  8. Audio Magazine
  9. Jadis DA88S schematic
  10. clone jadis jp200 preamp
  11. GROMMES LJ5
  12. Altec 1570B Feedback
  13. rebuilding 3tube zenith amp
  14. Effect of lower G2, EL84 PP
  15. Phono connection for pioneer sx34b
  16. Low output from two 6L6's for no apparent reason?
  17. Preamp design ok?
  18. GZ34 base?
  19. Tube Technology Genesis 100w monoblock manual?
  20. 6SN7 & 6V6 Push Pull - increase gain
  21. screen grid resistor value
  22. KT88 design questions
  23. el84/12ax7 se schematic needed!
  24. Broken AMC CVT 2100
  25. 98dB speaker - El Cheapo
  26. consolidated raw tube data
  27. Loadlines for Parallel SE outputs
  28. What is the correct load for an 845 triode?
  29. Rauland W-835A amplifier, choke field coil output?
  30. First use for Trancendent Sound Tube Analyzer
  31. Schematics/vintage
  32. APPJ PA0901A / Miniwatt N3 schematics
  33. APPJ PA0901A() schematics
  34. Help Needed: Lower Gain on a Tube Amp?
  35. Help: Hickok Western Electric KS-15750 Calibration
  36. Mullard ecc82 12au7 code help
  37. Wondering if I can use this XFMR to power two NYD 6SN7 1 bottle pres
  38. ST-70 Power Transformer
  39. Help Identifying a Tube - Westinghouse 12AX7A
  40. An incredible collection!
  41. Using only half of a stereo PP amp
  42. Low voltage vs. High Voltage Preamp.
  43. 6J6 Headphone hybrid amplifer?
  44. Hybrid headphone amp.....
  45. Please help with hum problem..
  46. Dead Audio Innovations Series 500
  47. Problems with E88CC / 6922 drawing grid current on power-up
  48. H.J.Leak TL12 "point one"
  49. Tubecad hybrird feedforward feedback shunt regulator
  50. 6v6 SE kit - any good?
  51. DBX 576 complete upgrade. Advices?
  52. help !! 45 tube
  53. 6P45S PP, simulation frustration.
  54. AMC CVT 3030 one more try - or dumpster
  55. Help for 211 HV PSU with damper diodes
  56. Flexible supply idea
  57. Equalizer on EL84 project
  58. parallel single-ended 12W6
  59. help improving/refurb a Fisher k-10 Tube spring reverb
  60. S.E.X. amp + Impedance switch build problems.
  61. problem with speaker
  62. EC80 as preamp tube.
  63. 6CJ3 Rectifier Connection Question ?
  64. AC Filament Voltage Question ?
  65. My new GU50 SE (all pentode)
  66. Ming Da MC-3R Schematics
  67. 12B4 PSE build thread
  68. Looking for options for 4 volt heater
  69. Help me,Art Audio Concerto
  70. heathkit t3 12sh7 tube
  71. PSU dimensioning for pre-amp
  72. Williamson preamp identification help wanted
  73. Adequate switch for UL-triode-pentode
  74. pl500 based integrated OTL amplifier
  75. Capacitor dielectric - high impedance headphones
  76. REQUEST FOR OPINIONS
  77. Mysterious LCR phono preamp
  78. Eimac 100TL Output Transformers and Bias Point ?
  79. Tube deterioration
  80. Heathkit XO-1 power cords
  81. EF86 Push-Pull "power"-amp
  82. Transformers!?
  83. Weird ground loop problem
  84. Re-caping Cayin A70-T
  85. A3 attenuator help for an Aikido line amp
  86. Driver Tube Power Supply Question ?
  87. Line Stage vs. Phase Inverter - 12A*7
  88. Intermittent Buzz Decware Zen SE84Bged
  89. Tamura F2011/el34 x 4
  90. E88CC/6922 battery supply
  91. Aikido 9-pin all-in-1 headphone amp problem
  92. Filament Transformer Question ?
  93. Load Resistance, etc., chart for Class A push pull 6L6s?
  94. Question about preamp, boost and line-stage
  95. help please
  96. Practical phase inverter article
  97. Tube vs. Jfet Preamp for Dynaco ST-35 tube power amp
  98. Rio W-41 no sound
  99. Help: TDA1541A DAC Output To Tube Gainstage
  100. Pieter's take on an all DHT headphone amplifier.
  101. toroidal chokes
  102. Truly Silly Transformer Question
  103. Elementary resistance question
  104. Russian 310A + 300B
  105. 1959 RCA tube amplifier needs help
  106. What's going on?
  107. Aikido 9-pin All-in-one Testing question
  108. Gyrator in Tail of LTP
  109. tubemaster EL84
  110. Silly transformer question
  111. Marant 8b bias meter
  112. Opera Consonance resitor question ?
  113. ADI's Double Dyna
  114. DuMont Stereo Tube Console late 50's - What to do?
  115. No Sound from Magnavox EL 1484-1 amp/phono
  116. Elevated Heater Question
  117. 6P45S/EL509 input capacitance in triode mode
  118. 6E6p-e Little Tiny Wire
  119. another aikido ?
  120. NOS 6P3S-e or cheap new 5881? Identify this tube..
  121. Contan Audio from Melbourne Aus, any info?
  122. Loctal Base Post
  123. Timber amp with solid copper plate as earth and ground plane
  124. Dynaco ST70 - Which tubes do you like?
  125. 6SL7 in parallel driving 6550
  126. Will this work as a heater for 300b?
  127. Tube grid resistance for 6P45S, fine?
  128. Akido help pls
  129. BEARD P101 information
  130. Got some 6n3c-e (6p3s-e)with blank bulb?
  131. Graaf GM-20
  132. medium power OTL circlotron amplifier
  133. Help me identity this amp
  134. Hajdinjak preamp + 2x mono tube amp -What to do?
  135. Moscode 600 Noisy Fan
  136. component reduction in signal chain
  137. Aikido with Stax
  138. Help need on Xindak XA3200MII hybrid pre-amplifier
  139. ideas for tube burn in / bias match station
  140. KT120 triode operation single stage amp
  141. Question regarding 7199 Tube wiring
  142. Why do modern PP OPTs have 16 Ohm taps?
  143. 10M45 current source
  144. 12bh7 in place of ecc82
  145. High voltage winding no center tap?
  146. Marantz 8b recap
  147. Pair Quad II in all original condition... restore or sell
  148. Where to find tube designers for hire?
  149. 10M45S problem
  150. 300B Load Line and Bias?
  151. Looking for little help with Glassware Janus shunt reg
  152. Quick question about grounding
  153. Source for 6jg5 or equivalent in Europe
  154. Need your help: Change from el34 to 6550 ends in a desaster
  155. conn el 6026 tube amp schematic for hifi stereo
  156. GE 211 "flash" question
  157. Learned something (the hard way) about mica capacitors
  158. Aikido octal floating output
  159. Screened cable for rewiring valve amp
  160. Fault developed, producing static noise
  161. Tubelab SE buzz and crackle
  162. EL34+Ecc83 amp hum
  163. Gold plated Dynaco ST-70 for $3k
  164. Preamp noise level ?
  165. KOSS A1220 - Vintage Tube Headphone Amp - Diagnose and Mod questions...
  166. Rectifier tube cathode and heater
  167. testing voltage on tube filament, without the tube
  168. New semi-custom metal chassis manufacturer
  169. 55 WPC 1625 Mono Block Amps
  170. Masco C-10 Mic/Phono Amp
  171. New driver stage for dynaco mk3
  172. Power Transformer Issue
  173. Marantz 8B
  174. Safety questions
  175. Step Attenuator
  176. amplifier output impedance measurement
  177. Regulated Vs Non-regulated linear Power Supply
  178. Single RIAA passive eq design for differential DC coupled tube circuit
  179. Amp to Drive Lowther DX3's in Rear Loaded Horn
  180. Anyone know what's going on with Antek?
  181. Sources of 120hz hum?
  182. make adapter from 6n2p to 12ax7
  183. DC coupling with a choke?
  184. help with hum 12ax7 preamp
  185. Signal->crossover->3 amps->speaker
  186. I want to build an inexpensive EL 84 integrated amp with a phono section.
  187. Scott17 KT88 SE Tube Amp Build Log
  188. heater currents
  189. 300B Orientation so logo faces forward
  190. Leak stereo 20
  191. Suggestion: Output tube in SET amp for midbass frequency
  192. Monster Hammond Output XFMRs
  193. 6A3 / 6B4G Design
  194. DC7 MK3 up and running.
  195. Marrantz Model 9 Transformer Buy
  196. 6N2P/6Н2П low plate current increases noise?
  197. first tube amp
  198. rogers cadet 111 or Quad 11
  199. New FM-3 Motherboard
  200. 12ax7(ecc83) and 6n2p 12ax7...........differents??
  201. Heater supply
  202. Very upgraded ST-70 kit/build w/ 6550 tubes
  203. Marantz 8b Electrolytics
  204. How biasing mA in tubes
  205. PSU id and help (psu designer ii)
  206. The all DHT SET Headphone Amp
  207. Assistance with rectifiers in PSUD
  208. Music Angel XD 500 MkII Bias setting
  209. Magnoval
  210. S.E.X. amp plate chokes replacements
  211. Ampex 600 Questions
  212. Antek out of business until April
  213. SE EL34 in triode schematic
  214. Sylvania Console?
  215. Can output transfomers be pick and mixed?
  216. i have just notice that my yaqin 2100 vk bias settings is all over the place.
  217. Preamp Design Review Request
  218. Red Plate Of Doom
  219. LED cathode bias noise issue
  220. PCL86 se amplif.
  221. Is This a good Amplier?
  222. Question: Class AB Hybrid with small signal triode and Power Mosfet output?
  223. Contemporary Transformer for Doubler
  224. The volume pot - The hidden villain of preamp
  225. Heathkit EUW-15 Univ. Power Supply (Tube)
  226. diamond cathode tubes
  227. 6146B
  228. ef86 based preamp
  229. 12FQ7 Why and will it be shortage?
  230. Trouble w/ Maida regulator bias supply
  231. impedance calculations
  232. calibrate stark 8-77?
  233. EZLoad Dummy Load
  234. Best kit for a rookie tube builder
  235. schematic question? 805 feedback
  236. 6av5ga distortion spectrum
  237. Single stage line with anode-cathode feedback
  238. VNAV' SUMO Contest 2011
  239. Direct heated triode (dht) cathode bypass: different options
  240. choice of driver for RS 241
  241. Wiring up 3 6.3 Volt Heaters to a 12V supply
  242. Adding LED's to my tubes4hifi sp6 preamp
  243. Stripped down HK A-300
  244. Westrex 2332A amplifiers
  245. Leak st20
  246. Where could I find these sockets???
  247. Hammond L-112
  248. 4-pin tube socket spring clips
  249. Quad FM1 tuner, could be in wrong section
  250. My first tube amp and speaker build I'm loven it

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