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  1. negative voltage drop across a diode
  2. 1.5K 200W output transformers? What tubes?
  3. 50 Type Tube
  4. "12SR7 Starving Student" plays extremly quiet
  5. questions about some sim software
  6. Drive
  7. 4xKT88 into Hammond 1650T, what am I missing?
  8. double mono SE
  9. Two electrolytic cap selection questions
  10. Could This Be the Future of Vacuum Tubes?
  11. Thermography on 6C33C/6C18C aka. 6S33S/6S18S
  12. Rydel's triode model coefficients
  13. 2E26 Options
  14. Loud Popping Dynaco ST-70
  15. Are these EL34's good?
  16. Amp schematic for Sovtek/Svetlana tubes
  17. KT66 power tube amplifier
  18. 6П3С Plate Voltage
  19. Help choosing which Amplifier to build
  20. need help choosing between two amp schems
  21. 100 W-class Circlotron
  22. How can i match power tubes for Transconductance ?
  23. ef89 ef86
  24. ecc82 5687 preamp! audionote
  25. Hammond transformer questions
  26. IXYS CP20M45 IXC - anyone come across them ?
  27. Good Source for Nice Analog Panel Ammeters for 833C Build?
  28. Restore or build from new?
  29. Bob Danielak 826 Amp?
  30. Newbie Tube Power Supply
  31. What shall I build/do with this lot of tubes?
  32. Gingertubes ecl86 amp build
  33. DC restorer
  34. ECF801 Triode/Pentode any useful application ?
  35. Baking Tubes Procedure - Help...
  36. AVO VCM-163 Tube tester problem
  37. ECC82 normal vs ECC82 long plate
  38. 45 Type Push/Pull Amps
  39. leak tl12+
  40. Triode for 60V
  41. Tube Sound Processor
  42. McIntosh MC-275 buy or build an auto-bias tube amp?
  43. slp-90 clone, decent preamp!
  44. Triode St70 with hum
  45. SSR switching HT transformer?
  46. Tube Flash Drive
  47. 6S31B-P Grid current
  48. Tube Op Amp Building Blocks
  49. knight kb-85 restoration/mod
  50. Acceptable Power Supply Noise Limits?
  51. Loadlines and Microsoft Paint
  52. aikido noval all in one caps upgrade
  53. Specific grid stopper question
  54. GU50 Screen Driven, DC Coupled
  55. April fool?
  56. Providing both balanced and unbalanced inputs
  57. Best triode section inside ecc81 tube?
  58. opt for 45 tube
  59. Designing an Interstage Transformer
  60. Tube Amplifier Builder's Competition
  61. testing tubes for shorts
  62. Tube kits
  63. GU29 PP Amplifier
  64. 1625 tube radio?
  65. Measuring volts on an unloaded PSU secondary
  66. Suggest a preamp project for me.
  67. Audio Magazine
  68. Jadis DA88S schematic
  69. clone jadis jp200 preamp
  70. GROMMES LJ5
  71. Altec 1570B Feedback
  72. rebuilding 3tube zenith amp
  73. Effect of lower G2, EL84 PP
  74. Phono connection for pioneer sx34b
  75. Low output from two 6L6's for no apparent reason?
  76. Preamp design ok?
  77. GZ34 base?
  78. Tube Technology Genesis 100w monoblock manual?
  79. 6SN7 & 6V6 Push Pull - increase gain
  80. screen grid resistor value
  81. KT88 design questions
  82. el84/12ax7 se schematic needed!
  83. Broken AMC CVT 2100
  84. 98dB speaker - El Cheapo
  85. consolidated raw tube data
  86. Loadlines for Parallel SE outputs
  87. What is the correct load for an 845 triode?
  88. Rauland W-835A amplifier, choke field coil output?
  89. First use for Trancendent Sound Tube Analyzer
  90. Schematics/vintage
  91. APPJ PA0901A / Miniwatt N3 schematics
  92. APPJ PA0901A() schematics
  93. Help Needed: Lower Gain on a Tube Amp?
  94. Help: Hickok Western Electric KS-15750 Calibration
  95. Mullard ecc82 12au7 code help
  96. Wondering if I can use this XFMR to power two NYD 6SN7 1 bottle pres
  97. ST-70 Power Transformer
  98. Help Identifying a Tube - Westinghouse 12AX7A
  99. An incredible collection!
  100. Using only half of a stereo PP amp
  101. Alternate Electrolytic Caps for SimpleSE (and others)
  102. Low voltage vs. High Voltage Preamp.
  103. 6J6 Headphone hybrid amplifer?
  104. Hybrid headphone amp.....
  105. Please help with hum problem..
  106. Dead Audio Innovations Series 500
  107. Problems with E88CC / 6922 drawing grid current on power-up
  108. H.J.Leak TL12 "point one"
  109. Tubecad hybrird feedforward feedback shunt regulator
  110. 6v6 SE kit - any good?
  111. DBX 576 complete upgrade. Advices?
  112. help !! 45 tube
  113. 6P45S PP, simulation frustration.
  114. AMC CVT 3030 one more try - or dumpster
  115. Help for 211 HV PSU with damper diodes
  116. Flexible supply idea
  117. what range speaker used 2x 18watt or 2x 10 watt on 18 watts amp
  118. Equalizer on EL84 project
  119. parallel single-ended 12W6
  120. help improving/refurb a Fisher k-10 Tube spring reverb
  121. S.E.X. amp + Impedance switch build problems.
  122. problem with speaker
  123. EC80 as preamp tube.
  124. 6CJ3 Rectifier Connection Question ?
  125. AC Filament Voltage Question ?
  126. My new GU50 SE (all pentode)
  127. Ming Da MC-3R Schematics
  128. 12B4 PSE build thread
  129. Looking for options for 4 volt heater
  130. Help me,Art Audio Concerto
  131. heathkit t3 12sh7 tube
  132. PSU dimensioning for pre-amp
  133. Old ceramic dogbone capacitor color codes
  134. Williamson preamp identification help wanted
  135. Adequate switch for UL-triode-pentode
  136. pl500 based integrated OTL amplifier
  137. Capacitor dielectric - high impedance headphones
  138. REQUEST FOR OPINIONS
  139. Mysterious LCR phono preamp
  140. Eimac 100TL Output Transformers and Bias Point ?
  141. Tube deterioration
  142. Heathkit XO-1 power cords
  143. EF86 Push-Pull "power"-amp
  144. Transformers!?
  145. Weird ground loop problem
  146. Re-caping Cayin A70-T
  147. A3 attenuator help for an Aikido line amp
  148. Driver Tube Power Supply Question ?
  149. Line Stage vs. Phase Inverter - 12A*7
  150. Intermittent Buzz Decware Zen SE84Bged
  151. Tamura F2011/el34 x 4
  152. E88CC/6922 battery supply
  153. Aikido 9-pin all-in-1 headphone amp problem
  154. Filament Transformer Question ?
  155. Load Resistance, etc., chart for Class A push pull 6L6s?
  156. Question about preamp, boost and line-stage
  157. help please
  158. Practical phase inverter article
  159. Tube vs. Jfet Preamp for Dynaco ST-35 tube power amp
  160. Rio W-41 no sound
  161. Help: TDA1541A DAC Output To Tube Gainstage
  162. Pieter's take on an all DHT headphone amplifier.
  163. toroidal chokes
  164. Truly Silly Transformer Question
  165. Elementary resistance question
  166. Russian 310A + 300B
  167. 1959 RCA tube amplifier needs help
  168. What's going on?
  169. Aikido 9-pin All-in-one Testing question
  170. Gyrator in Tail of LTP
  171. tubemaster EL84
  172. Silly transformer question
  173. Marant 8b bias meter
  174. ElectroTone OrganMate spring reverb - mod suggestions?
  175. Opera Consonance resitor question ?
  176. ADI's Double Dyna
  177. DuMont Stereo Tube Console late 50's - What to do?
  178. No Sound from Magnavox EL 1484-1 amp/phono
  179. Elevated Heater Question
  180. 6P45S/EL509 input capacitance in triode mode
  181. 6E6p-e Little Tiny Wire
  182. another aikido ?
  183. NOS 6P3S-e or cheap new 5881? Identify this tube..
  184. Contan Audio from Melbourne Aus, any info?
  185. Loctal Base Post
  186. Timber amp with solid copper plate as earth and ground plane
  187. Dynaco ST70 - Which tubes do you like?
  188. 6SL7 in parallel driving 6550
  189. Will this work as a heater for 300b?
  190. Tube grid resistance for 6P45S, fine?
  191. Akido help pls
  192. BEARD P101 information
  193. Got some 6n3c-e (6p3s-e)with blank bulb?
  194. Graaf GM-20
  195. medium power OTL circlotron amplifier
  196. Help me identity this amp
  197. Hajdinjak preamp + 2x mono tube amp -What to do?
  198. Moscode 600 Noisy Fan
  199. component reduction in signal chain
  200. Aikido with Stax
  201. 'High power' shunt regulator
  202. Help need on Xindak XA3200MII hybrid pre-amplifier
  203. ideas for tube burn in / bias match station
  204. KT120 triode operation single stage amp
  205. Question regarding 7199 Tube wiring
  206. Why do modern PP OPTs have 16 Ohm taps?
  207. 10M45 current source
  208. 12bh7 in place of ecc82
  209. High voltage winding no center tap?
  210. Marantz 8b recap
  211. Pair Quad II in all original condition... restore or sell
  212. Where to find tube designers for hire?
  213. 10M45S problem
  214. 300B Load Line and Bias?
  215. Looking for little help with Glassware Janus shunt reg
  216. Quick question about grounding
  217. Source for 6jg5 or equivalent in Europe
  218. Need your help: Change from el34 to 6550 ends in a desaster
  219. conn el 6026 tube amp schematic for hifi stereo
  220. GE 211 "flash" question
  221. Learned something (the hard way) about mica capacitors
  222. Aikido octal floating output
  223. Screened cable for rewiring valve amp
  224. Fault developed, producing static noise
  225. Tubelab SE buzz and crackle
  226. EL34+Ecc83 amp hum
  227. Gold plated Dynaco ST-70 for $3k
  228. Preamp noise level ?
  229. KOSS A1220 - Vintage Tube Headphone Amp - Diagnose and Mod questions...
  230. Rectifier tube cathode and heater
  231. testing voltage on tube filament, without the tube
  232. New semi-custom metal chassis manufacturer
  233. 55 WPC 1625 Mono Block Amps
  234. Masco C-10 Mic/Phono Amp
  235. New driver stage for dynaco mk3
  236. Power Transformer Issue
  237. Marantz 8B
  238. Safety questions
  239. Step Attenuator
  240. amplifier output impedance measurement
  241. Regulated Vs Non-regulated linear Power Supply
  242. Single RIAA passive eq design for differential DC coupled tube circuit
  243. Amp to Drive Lowther DX3's in Rear Loaded Horn
  244. Anyone know what's going on with Antek?
  245. Sources of 120hz hum?
  246. make adapter from 6n2p to 12ax7
  247. DC coupling with a choke?
  248. help with hum 12ax7 preamp
  249. Signal->crossover->3 amps->speaker
  250. I want to build an inexpensive EL 84 integrated amp with a phono section.

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