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  1. Tube Op Amp Building Blocks
  2. knight kb-85 restoration/mod
  3. Acceptable Power Supply Noise Limits?
  4. Loadlines and Microsoft Paint
  5. aikido noval all in one caps upgrade
  6. Specific grid stopper question
  7. GU50 Screen Driven, DC Coupled
  8. April fool?
  9. Providing both balanced and unbalanced inputs
  10. Best triode section inside ecc81 tube?
  11. opt for 45 tube
  12. Designing an Interstage Transformer
  13. Tube Amplifier Builder's Competition
  14. testing tubes for shorts
  15. Tube kits
  16. GU29 PP Amplifier
  17. 1625 tube radio?
  18. Measuring volts on an unloaded PSU secondary
  19. Suggest a preamp project for me.
  20. Audio Magazine
  21. Jadis DA88S schematic
  22. clone jadis jp200 preamp
  23. GROMMES LJ5
  24. Altec 1570B Feedback
  25. rebuilding 3tube zenith amp
  26. Effect of lower G2, EL84 PP
  27. Phono connection for pioneer sx34b
  28. Low output from two 6L6's for no apparent reason?
  29. Preamp design ok?
  30. GZ34 base?
  31. Tube Technology Genesis 100w monoblock manual?
  32. 6SN7 & 6V6 Push Pull - increase gain
  33. screen grid resistor value
  34. KT88 design questions
  35. el84/12ax7 se schematic needed!
  36. Broken AMC CVT 2100
  37. 98dB speaker - El Cheapo
  38. consolidated raw tube data
  39. Loadlines for Parallel SE outputs
  40. What is the correct load for an 845 triode?
  41. Rauland W-835A amplifier, choke field coil output?
  42. First use for Trancendent Sound Tube Analyzer
  43. Schematics/vintage
  44. APPJ PA0901A / Miniwatt N3 schematics
  45. APPJ PA0901A() schematics
  46. Help Needed: Lower Gain on a Tube Amp?
  47. Help: Hickok Western Electric KS-15750 Calibration
  48. Mullard ecc82 12au7 code help
  49. Wondering if I can use this XFMR to power two NYD 6SN7 1 bottle pres
  50. ST-70 Power Transformer
  51. Help Identifying a Tube - Westinghouse 12AX7A
  52. An incredible collection!
  53. Using only half of a stereo PP amp
  54. Alternate Electrolytic Caps for SimpleSE (and others)
  55. Low voltage vs. High Voltage Preamp.
  56. 6J6 Headphone hybrid amplifer?
  57. Hybrid headphone amp.....
  58. Please help with hum problem..
  59. Dead Audio Innovations Series 500
  60. Problems with E88CC / 6922 drawing grid current on power-up
  61. H.J.Leak TL12 "point one"
  62. Tubecad hybrird feedforward feedback shunt regulator
  63. 6v6 SE kit - any good?
  64. DBX 576 complete upgrade. Advices?
  65. help !! 45 tube
  66. 6P45S PP, simulation frustration.
  67. AMC CVT 3030 one more try - or dumpster
  68. Help for 211 HV PSU with damper diodes
  69. Flexible supply idea
  70. what range speaker used 2x 18watt or 2x 10 watt on 18 watts amp
  71. Equalizer on EL84 project
  72. parallel single-ended 12W6
  73. help improving/refurb a Fisher k-10 Tube spring reverb
  74. S.E.X. amp + Impedance switch build problems.
  75. problem with speaker
  76. EC80 as preamp tube.
  77. 6CJ3 Rectifier Connection Question ?
  78. AC Filament Voltage Question ?
  79. My new GU50 SE (all pentode)
  80. Ming Da MC-3R Schematics
  81. 12B4 PSE build thread
  82. Looking for options for 4 volt heater
  83. Help me,Art Audio Concerto
  84. heathkit t3 12sh7 tube
  85. PSU dimensioning for pre-amp
  86. Old ceramic dogbone capacitor color codes
  87. Williamson preamp identification help wanted
  88. Adequate switch for UL-triode-pentode
  89. pl500 based integrated OTL amplifier
  90. Capacitor dielectric - high impedance headphones
  91. REQUEST FOR OPINIONS
  92. Mysterious LCR phono preamp
  93. Eimac 100TL Output Transformers and Bias Point ?
  94. Tube deterioration
  95. Heathkit XO-1 power cords
  96. EF86 Push-Pull "power"-amp
  97. Transformers!?
  98. Weird ground loop problem
  99. Re-caping Cayin A70-T
  100. A3 attenuator help for an Aikido line amp
  101. Driver Tube Power Supply Question ?
  102. Line Stage vs. Phase Inverter - 12A*7
  103. Intermittent Buzz Decware Zen SE84Bged
  104. Tamura F2011/el34 x 4
  105. E88CC/6922 battery supply
  106. Aikido 9-pin all-in-1 headphone amp problem
  107. Filament Transformer Question ?
  108. Load Resistance, etc., chart for Class A push pull 6L6s?
  109. Question about preamp, boost and line-stage
  110. help please
  111. Practical phase inverter article
  112. Tube vs. Jfet Preamp for Dynaco ST-35 tube power amp
  113. Rio W-41 no sound
  114. Help: TDA1541A DAC Output To Tube Gainstage
  115. Pieter's take on an all DHT headphone amplifier.
  116. toroidal chokes
  117. Truly Silly Transformer Question
  118. Elementary resistance question
  119. Russian 310A + 300B
  120. 1959 RCA tube amplifier needs help
  121. What's going on?
  122. Aikido 9-pin All-in-one Testing question
  123. Gyrator in Tail of LTP
  124. tubemaster EL84
  125. Silly transformer question
  126. Marant 8b bias meter
  127. ElectroTone OrganMate spring reverb - mod suggestions?
  128. Opera Consonance resitor question ?
  129. ADI's Double Dyna
  130. DuMont Stereo Tube Console late 50's - What to do?
  131. No Sound from Magnavox EL 1484-1 amp/phono
  132. Elevated Heater Question
  133. 6P45S/EL509 input capacitance in triode mode
  134. 6E6p-e Little Tiny Wire
  135. another aikido ?
  136. NOS 6P3S-e or cheap new 5881? Identify this tube..
  137. Contan Audio from Melbourne Aus, any info?
  138. Loctal Base Post
  139. Timber amp with solid copper plate as earth and ground plane
  140. Dynaco ST70 - Which tubes do you like?
  141. 6SL7 in parallel driving 6550
  142. Will this work as a heater for 300b?
  143. Tube grid resistance for 6P45S, fine?
  144. Akido help pls
  145. BEARD P101 information
  146. Got some 6n3c-e (6p3s-e)with blank bulb?
  147. Graaf GM-20
  148. medium power OTL circlotron amplifier
  149. Help me identity this amp
  150. Hajdinjak preamp + 2x mono tube amp -What to do?
  151. Moscode 600 Noisy Fan
  152. component reduction in signal chain
  153. Aikido with Stax
  154. 'High power' shunt regulator
  155. Help need on Xindak XA3200MII hybrid pre-amplifier
  156. ideas for tube burn in / bias match station
  157. KT120 triode operation single stage amp
  158. Question regarding 7199 Tube wiring
  159. Why do modern PP OPTs have 16 Ohm taps?
  160. 10M45 current source
  161. 12bh7 in place of ecc82
  162. High voltage winding no center tap?
  163. Marantz 8b recap
  164. Pair Quad II in all original condition... restore or sell
  165. Where to find tube designers for hire?
  166. 10M45S problem
  167. 300B Load Line and Bias?
  168. Looking for little help with Glassware Janus shunt reg
  169. Quick question about grounding
  170. Source for 6jg5 or equivalent in Europe
  171. Need your help: Change from el34 to 6550 ends in a desaster
  172. conn el 6026 tube amp schematic for hifi stereo
  173. GE 211 "flash" question
  174. Learned something (the hard way) about mica capacitors
  175. Aikido octal floating output
  176. Screened cable for rewiring valve amp
  177. Fault developed, producing static noise
  178. Tubelab SE buzz and crackle
  179. EL34+Ecc83 amp hum
  180. Gold plated Dynaco ST-70 for $3k
  181. Preamp noise level ?
  182. KOSS A1220 - Vintage Tube Headphone Amp - Diagnose and Mod questions...
  183. Rectifier tube cathode and heater
  184. testing voltage on tube filament, without the tube
  185. New semi-custom metal chassis manufacturer
  186. 55 WPC 1625 Mono Block Amps
  187. Masco C-10 Mic/Phono Amp
  188. New driver stage for dynaco mk3
  189. Power Transformer Issue
  190. Marantz 8B
  191. Safety questions
  192. Step Attenuator
  193. amplifier output impedance measurement
  194. Regulated Vs Non-regulated linear Power Supply
  195. Single RIAA passive eq design for differential DC coupled tube circuit
  196. Amp to Drive Lowther DX3's in Rear Loaded Horn
  197. Anyone know what's going on with Antek?
  198. Sources of 120hz hum?
  199. make adapter from 6n2p to 12ax7
  200. DC coupling with a choke?
  201. help with hum 12ax7 preamp
  202. Signal->crossover->3 amps->speaker
  203. I want to build an inexpensive EL 84 integrated amp with a phono section.
  204. Scott17 KT88 SE Tube Amp Build Log
  205. heater currents
  206. 300B Orientation so logo faces forward
  207. Leak stereo 20
  208. Suggestion: Output tube in SET amp for midbass frequency
  209. Monster Hammond Output XFMRs
  210. 6A3 / 6B4G Design
  211. DC7 MK3 up and running.
  212. Marrantz Model 9 Transformer Buy
  213. 6N2P/6Н2П low plate current increases noise?
  214. first tube amp
  215. rogers cadet 111 or Quad 11
  216. New FM-3 Motherboard
  217. 12ax7(ecc83) and 6n2p 12ax7...........differents??
  218. Heater supply
  219. Very upgraded ST-70 kit/build w/ 6550 tubes
  220. Marantz 8b Electrolytics
  221. How biasing mA in tubes
  222. PSU id and help (psu designer ii)
  223. The all DHT SET Headphone Amp
  224. Assistance with rectifiers in PSUD
  225. Music Angel XD 500 MkII Bias setting
  226. Magnoval
  227. S.E.X. amp plate chokes replacements
  228. Ampex 600 Questions
  229. Antek out of business until April
  230. SE EL34 in triode schematic
  231. Sylvania Console?
  232. Can output transfomers be pick and mixed?
  233. i have just notice that my yaqin 2100 vk bias settings is all over the place.
  234. Preamp Design Review Request
  235. Red Plate Of Doom
  236. LED cathode bias noise issue
  237. PCL86 se amplif.
  238. Is This a good Amplier?
  239. Question: Class AB Hybrid with small signal triode and Power Mosfet output?
  240. Contemporary Transformer for Doubler
  241. The volume pot - The hidden villain of preamp
  242. Heathkit EUW-15 Univ. Power Supply (Tube)
  243. diamond cathode tubes
  244. 6146B
  245. ef86 based preamp
  246. 12FQ7 Why and will it be shortage?
  247. Trouble w/ Maida regulator bias supply
  248. impedance calculations
  249. calibrate stark 8-77?
  250. EZLoad Dummy Load

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