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  1. Are these EL34's good?
  2. Amp schematic for Sovtek/Svetlana tubes
  3. KT66 power tube amplifier
  4. 6П3С Plate Voltage
  5. Help choosing which Amplifier to build
  6. need help choosing between two amp schems
  7. 100 W-class Circlotron
  8. How can i match power tubes for Transconductance ?
  9. ef89 ef86
  10. ecc82 5687 preamp! audionote
  11. Hammond transformer questions
  12. IXYS CP20M45 IXC - anyone come across them ?
  13. Good Source for Nice Analog Panel Ammeters for 833C Build?
  14. Restore or build from new?
  15. Bob Danielak 826 Amp?
  16. Newbie Tube Power Supply
  17. What shall I build/do with this lot of tubes?
  18. Gingertubes ecl86 amp build
  19. DC restorer
  20. ECF801 Triode/Pentode any useful application ?
  21. Baking Tubes Procedure - Help...
  22. AVO VCM-163 Tube tester problem
  23. ECC82 normal vs ECC82 long plate
  24. 45 Type Push/Pull Amps
  25. leak tl12+
  26. Triode for 60V
  27. Tube Sound Processor
  28. McIntosh MC-275 buy or build an auto-bias tube amp?
  29. slp-90 clone, decent preamp!
  30. Triode St70 with hum
  31. SSR switching HT transformer?
  32. Tube Flash Drive
  33. 6S31B-P Grid current
  34. Tube Op Amp Building Blocks
  35. knight kb-85 restoration/mod
  36. Acceptable Power Supply Noise Limits?
  37. Loadlines and Microsoft Paint
  38. aikido noval all in one caps upgrade
  39. Specific grid stopper question
  40. GU50 Screen Driven, DC Coupled
  41. April fool?
  42. Providing both balanced and unbalanced inputs
  43. Best triode section inside ecc81 tube?
  44. opt for 45 tube
  45. Designing an Interstage Transformer
  46. Tube Amplifier Builder's Competition
  47. testing tubes for shorts
  48. Tube kits
  49. GU29 PP Amplifier
  50. 1625 tube radio?
  51. Measuring volts on an unloaded PSU secondary
  52. Suggest a preamp project for me.
  53. Audio Magazine
  54. Jadis DA88S schematic
  55. clone jadis jp200 preamp
  56. GROMMES LJ5
  57. Altec 1570B Feedback
  58. rebuilding 3tube zenith amp
  59. Effect of lower G2, EL84 PP
  60. Phono connection for pioneer sx34b
  61. Low output from two 6L6's for no apparent reason?
  62. Preamp design ok?
  63. GZ34 base?
  64. Tube Technology Genesis 100w monoblock manual?
  65. 6SN7 & 6V6 Push Pull - increase gain
  66. screen grid resistor value
  67. KT88 design questions
  68. el84/12ax7 se schematic needed!
  69. Broken AMC CVT 2100
  70. 98dB speaker - El Cheapo
  71. consolidated raw tube data
  72. Loadlines for Parallel SE outputs
  73. What is the correct load for an 845 triode?
  74. Rauland W-835A amplifier, choke field coil output?
  75. First use for Trancendent Sound Tube Analyzer
  76. Schematics/vintage
  77. APPJ PA0901A / Miniwatt N3 schematics
  78. APPJ PA0901A() schematics
  79. Help Needed: Lower Gain on a Tube Amp?
  80. Help: Hickok Western Electric KS-15750 Calibration
  81. Mullard ecc82 12au7 code help
  82. Wondering if I can use this XFMR to power two NYD 6SN7 1 bottle pres
  83. ST-70 Power Transformer
  84. Help Identifying a Tube - Westinghouse 12AX7A
  85. An incredible collection!
  86. Using only half of a stereo PP amp
  87. Alternate Electrolytic Caps for SimpleSE (and others)
  88. Low voltage vs. High Voltage Preamp.
  89. 6J6 Headphone hybrid amplifer?
  90. Hybrid headphone amp.....
  91. Please help with hum problem..
  92. Dead Audio Innovations Series 500
  93. Problems with E88CC / 6922 drawing grid current on power-up
  94. H.J.Leak TL12 "point one"
  95. Tubecad hybrird feedforward feedback shunt regulator
  96. 6v6 SE kit - any good?
  97. DBX 576 complete upgrade. Advices?
  98. help !! 45 tube
  99. 6P45S PP, simulation frustration.
  100. AMC CVT 3030 one more try - or dumpster
  101. Help for 211 HV PSU with damper diodes
  102. Flexible supply idea
  103. what range speaker used 2x 18watt or 2x 10 watt on 18 watts amp
  104. Equalizer on EL84 project
  105. parallel single-ended 12W6
  106. help improving/refurb a Fisher k-10 Tube spring reverb
  107. S.E.X. amp + Impedance switch build problems.
  108. problem with speaker
  109. EC80 as preamp tube.
  110. 6CJ3 Rectifier Connection Question ?
  111. AC Filament Voltage Question ?
  112. My new GU50 SE (all pentode)
  113. Ming Da MC-3R Schematics
  114. 12B4 PSE build thread
  115. Looking for options for 4 volt heater
  116. Help me,Art Audio Concerto
  117. heathkit t3 12sh7 tube
  118. PSU dimensioning for pre-amp
  119. Old ceramic dogbone capacitor color codes
  120. Williamson preamp identification help wanted
  121. Adequate switch for UL-triode-pentode
  122. pl500 based integrated OTL amplifier
  123. Capacitor dielectric - high impedance headphones
  124. REQUEST FOR OPINIONS
  125. Mysterious LCR phono preamp
  126. Eimac 100TL Output Transformers and Bias Point ?
  127. Tube deterioration
  128. Heathkit XO-1 power cords
  129. EF86 Push-Pull "power"-amp
  130. Transformers!?
  131. Weird ground loop problem
  132. Re-caping Cayin A70-T
  133. A3 attenuator help for an Aikido line amp
  134. Driver Tube Power Supply Question ?
  135. Line Stage vs. Phase Inverter - 12A*7
  136. Intermittent Buzz Decware Zen SE84Bged
  137. Tamura F2011/el34 x 4
  138. E88CC/6922 battery supply
  139. Aikido 9-pin all-in-1 headphone amp problem
  140. Filament Transformer Question ?
  141. Load Resistance, etc., chart for Class A push pull 6L6s?
  142. Question about preamp, boost and line-stage
  143. help please
  144. Practical phase inverter article
  145. Tube vs. Jfet Preamp for Dynaco ST-35 tube power amp
  146. Rio W-41 no sound
  147. Help: TDA1541A DAC Output To Tube Gainstage
  148. Pieter's take on an all DHT headphone amplifier.
  149. toroidal chokes
  150. Truly Silly Transformer Question
  151. Elementary resistance question
  152. Russian 310A + 300B
  153. 1959 RCA tube amplifier needs help
  154. What's going on?
  155. Aikido 9-pin All-in-one Testing question
  156. Gyrator in Tail of LTP
  157. tubemaster EL84
  158. Silly transformer question
  159. Marant 8b bias meter
  160. ElectroTone OrganMate spring reverb - mod suggestions?
  161. Opera Consonance resitor question ?
  162. ADI's Double Dyna
  163. DuMont Stereo Tube Console late 50's - What to do?
  164. No Sound from Magnavox EL 1484-1 amp/phono
  165. Elevated Heater Question
  166. 6P45S/EL509 input capacitance in triode mode
  167. 6E6p-e Little Tiny Wire
  168. another aikido ?
  169. NOS 6P3S-e or cheap new 5881? Identify this tube..
  170. Contan Audio from Melbourne Aus, any info?
  171. Loctal Base Post
  172. Timber amp with solid copper plate as earth and ground plane
  173. Dynaco ST70 - Which tubes do you like?
  174. 6SL7 in parallel driving 6550
  175. Will this work as a heater for 300b?
  176. Tube grid resistance for 6P45S, fine?
  177. Akido help pls
  178. BEARD P101 information
  179. Got some 6n3c-e (6p3s-e)with blank bulb?
  180. Graaf GM-20
  181. medium power OTL circlotron amplifier
  182. Help me identity this amp
  183. Hajdinjak preamp + 2x mono tube amp -What to do?
  184. Moscode 600 Noisy Fan
  185. component reduction in signal chain
  186. Aikido with Stax
  187. 'High power' shunt regulator
  188. Help need on Xindak XA3200MII hybrid pre-amplifier
  189. ideas for tube burn in / bias match station
  190. KT120 triode operation single stage amp
  191. Question regarding 7199 Tube wiring
  192. Why do modern PP OPTs have 16 Ohm taps?
  193. 10M45 current source
  194. 12bh7 in place of ecc82
  195. High voltage winding no center tap?
  196. Marantz 8b recap
  197. Pair Quad II in all original condition... restore or sell
  198. Where to find tube designers for hire?
  199. 10M45S problem
  200. 300B Load Line and Bias?
  201. Looking for little help with Glassware Janus shunt reg
  202. Quick question about grounding
  203. Source for 6jg5 or equivalent in Europe
  204. Need your help: Change from el34 to 6550 ends in a desaster
  205. conn el 6026 tube amp schematic for hifi stereo
  206. GE 211 "flash" question
  207. Learned something (the hard way) about mica capacitors
  208. Aikido octal floating output
  209. Screened cable for rewiring valve amp
  210. Fault developed, producing static noise
  211. Tubelab SE buzz and crackle
  212. EL34+Ecc83 amp hum
  213. Gold plated Dynaco ST-70 for $3k
  214. Preamp noise level ?
  215. KOSS A1220 - Vintage Tube Headphone Amp - Diagnose and Mod questions...
  216. Rectifier tube cathode and heater
  217. testing voltage on tube filament, without the tube
  218. New semi-custom metal chassis manufacturer
  219. 55 WPC 1625 Mono Block Amps
  220. Masco C-10 Mic/Phono Amp
  221. New driver stage for dynaco mk3
  222. Power Transformer Issue
  223. Marantz 8B
  224. Safety questions
  225. Step Attenuator
  226. amplifier output impedance measurement
  227. Regulated Vs Non-regulated linear Power Supply
  228. Single RIAA passive eq design for differential DC coupled tube circuit
  229. Amp to Drive Lowther DX3's in Rear Loaded Horn
  230. Anyone know what's going on with Antek?
  231. Sources of 120hz hum?
  232. make adapter from 6n2p to 12ax7
  233. DC coupling with a choke?
  234. help with hum 12ax7 preamp
  235. Signal->crossover->3 amps->speaker
  236. I want to build an inexpensive EL 84 integrated amp with a phono section.
  237. Scott17 KT88 SE Tube Amp Build Log
  238. heater currents
  239. 300B Orientation so logo faces forward
  240. Leak stereo 20
  241. Suggestion: Output tube in SET amp for midbass frequency
  242. Monster Hammond Output XFMRs
  243. 6A3 / 6B4G Design
  244. DC7 MK3 up and running.
  245. Marrantz Model 9 Transformer Buy
  246. 6N2P/6Н2П low plate current increases noise?
  247. first tube amp
  248. rogers cadet 111 or Quad 11
  249. New FM-3 Motherboard
  250. 12ax7(ecc83) and 6n2p 12ax7...........differents??

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