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  1. RCA SP-20 circuit question.
  2. Magnavox Model 1ST525A
  3. LD91 signature power transformer wires Help?
  4. Effect of Regulated DC Filament Supply
  5. D3a-300b amp help!
  6. Need Schematic for this GE Console fast.
  7. Sound experiences 6SN7
  8. EL152 maximum operating settings?
  9. OMG just scored a huge lot of Nos/Nib tube lot for $20
  10. Help with DN2540 CCS design
  11. Strange problem with Caps not blocking DC
  12. Help and suggestions for My Phono and pre amp
  13. PCB and transformer placing and shielding
  14. MC-40 bias current?
  15. Gyrator on ccs-tailed LTP?
  16. capacitor polarity on a VM 20050 amp
  17. Choke? Where to begin?
  18. H11F1 Switching in tube circuits
  19. cooling traditional E-core iron transformers
  20. New vacuum-tube preamp-project!
  21. DIY tube tester
  22. NABU TuneLabSE Buildup
  23. I just inherited a TON of tubes and tube amp components.
  24. Filament Transformer Question ?
  25. Low gain in Heathkit SA-2 phonostage
  26. speakers for leak tl12+
  27. LM3875 + Broskie Cathode Follower. (PICS)
  28. Has anyone built Andrea Ciuffolis Phono End ?
  29. tube substitute
  30. Motorcapacitors in high volt. power supplies?
  31. Troughline, Stereo 20, Technics 1200.Unhappy!
  32. Troughline, Stereo 20, Technics 1200.Unhappy!
  33. Volume potentiometer: the best way to do it...
  34. KT120 "triode" and Hammond 1650N
  35. Tubecad SE Amp Cad
  36. 5702wb
  37. Does anyone know of a company that makes circular risers for tubes?
  38. Negative feedback to differential pair driver
  39. effects send and/or preamp out jack on guitar amps
  40. 6L6 UL Power
  41. Bench Power Supply: What to look for ? Which one to get ?
  42. Bevois Valley EL84 PP - distortion in one channel
  43. good by til next winter
  44. PSUD Questions
  45. Power Transformer Wiring Question ?
  46. Fisher 500C C82/C84 ceramic capacitor function
  47. Tubes to first taker
  48. Neutral wired to chassis, how to add a 3-prong cord?
  49. Heater Transformer - too much voltage
  50. Capacitor value
  51. WD KT88
  52. Ultimate spud amp - any ideas ?
  53. Please Critique My Grounding Scheme
  54. negative voltage drop across a diode
  55. 1.5K 200W output transformers? What tubes?
  56. 50 Type Tube
  57. "12SR7 Starving Student" plays extremly quiet
  58. questions about some sim software
  59. Drive
  60. 4xKT88 into Hammond 1650T, what am I missing?
  61. double mono SE
  62. Two electrolytic cap selection questions
  63. Could This Be the Future of Vacuum Tubes?
  64. Thermography on 6C33C/6C18C aka. 6S33S/6S18S
  65. Rydel's triode model coefficients
  66. 2E26 Options
  67. Loud Popping Dynaco ST-70
  68. Are these EL34's good?
  69. Amp schematic for Sovtek/Svetlana tubes
  70. KT66 power tube amplifier
  71. 6П3С Plate Voltage
  72. Help choosing which Amplifier to build
  73. need help choosing between two amp schems
  74. 100 W-class Circlotron
  75. How can i match power tubes for Transconductance ?
  76. ef89 ef86
  77. ecc82 5687 preamp! audionote
  78. Hammond transformer questions
  79. IXYS CP20M45 IXC - anyone come across them ?
  80. Good Source for Nice Analog Panel Ammeters for 833C Build?
  81. Restore or build from new?
  82. Bob Danielak 826 Amp?
  83. Newbie Tube Power Supply
  84. What shall I build/do with this lot of tubes?
  85. Gingertubes ecl86 amp build
  86. DC restorer
  87. ECF801 Triode/Pentode any useful application ?
  88. Baking Tubes Procedure - Help...
  89. AVO VCM-163 Tube tester problem
  90. ECC82 normal vs ECC82 long plate
  91. 45 Type Push/Pull Amps
  92. leak tl12+
  93. Triode for 60V
  94. Tube Sound Processor
  95. McIntosh MC-275 buy or build an auto-bias tube amp?
  96. slp-90 clone, decent preamp!
  97. Triode St70 with hum
  98. SSR switching HT transformer?
  99. Tube Flash Drive
  100. 6S31B-P Grid current
  101. Tube Op Amp Building Blocks
  102. knight kb-85 restoration/mod
  103. Acceptable Power Supply Noise Limits?
  104. Loadlines and Microsoft Paint
  105. aikido noval all in one caps upgrade
  106. Specific grid stopper question
  107. GU50 Screen Driven, DC Coupled
  108. April fool?
  109. Providing both balanced and unbalanced inputs
  110. Best triode section inside ecc81 tube?
  111. opt for 45 tube
  112. Designing an Interstage Transformer
  113. Tube Amplifier Builder's Competition
  114. testing tubes for shorts
  115. Tube kits
  116. GU29 PP Amplifier
  117. 1625 tube radio?
  118. Measuring volts on an unloaded PSU secondary
  119. Suggest a preamp project for me.
  120. Audio Magazine
  121. Jadis DA88S schematic
  122. clone jadis jp200 preamp
  123. GROMMES LJ5
  124. Altec 1570B Feedback
  125. rebuilding 3tube zenith amp
  126. Effect of lower G2, EL84 PP
  127. Phono connection for pioneer sx34b
  128. Low output from two 6L6's for no apparent reason?
  129. Preamp design ok?
  130. GZ34 base?
  131. Tube Technology Genesis 100w monoblock manual?
  132. 6SN7 & 6V6 Push Pull - increase gain
  133. screen grid resistor value
  134. KT88 design questions
  135. el84/12ax7 se schematic needed!
  136. Broken AMC CVT 2100
  137. 98dB speaker - El Cheapo
  138. consolidated raw tube data
  139. Loadlines for Parallel SE outputs
  140. What is the correct load for an 845 triode?
  141. Rauland W-835A amplifier, choke field coil output?
  142. First use for Trancendent Sound Tube Analyzer
  143. Schematics/vintage
  144. APPJ PA0901A / Miniwatt N3 schematics
  145. APPJ PA0901A() schematics
  146. Help Needed: Lower Gain on a Tube Amp?
  147. Help: Hickok Western Electric KS-15750 Calibration
  148. Mullard ecc82 12au7 code help
  149. Wondering if I can use this XFMR to power two NYD 6SN7 1 bottle pres
  150. ST-70 Power Transformer
  151. Help Identifying a Tube - Westinghouse 12AX7A
  152. An incredible collection!
  153. Using only half of a stereo PP amp
  154. Alternate Electrolytic Caps for SimpleSE (and others)
  155. Low voltage vs. High Voltage Preamp.
  156. 6J6 Headphone hybrid amplifer?
  157. Hybrid headphone amp.....
  158. Please help with hum problem..
  159. Dead Audio Innovations Series 500
  160. Problems with E88CC / 6922 drawing grid current on power-up
  161. H.J.Leak TL12 "point one"
  162. Tubecad hybrird feedforward feedback shunt regulator
  163. 6v6 SE kit - any good?
  164. DBX 576 complete upgrade. Advices?
  165. help !! 45 tube
  166. 6P45S PP, simulation frustration.
  167. AMC CVT 3030 one more try - or dumpster
  168. Help for 211 HV PSU with damper diodes
  169. Flexible supply idea
  170. what range speaker used 2x 18watt or 2x 10 watt on 18 watts amp
  171. Equalizer on EL84 project
  172. parallel single-ended 12W6
  173. help improving/refurb a Fisher k-10 Tube spring reverb
  174. S.E.X. amp + Impedance switch build problems.
  175. problem with speaker
  176. EC80 as preamp tube.
  177. 6CJ3 Rectifier Connection Question ?
  178. AC Filament Voltage Question ?
  179. My new GU50 SE (all pentode)
  180. Ming Da MC-3R Schematics
  181. 12B4 PSE build thread
  182. Looking for options for 4 volt heater
  183. Help me,Art Audio Concerto
  184. heathkit t3 12sh7 tube
  185. PSU dimensioning for pre-amp
  186. Old ceramic dogbone capacitor color codes
  187. Williamson preamp identification help wanted
  188. Adequate switch for UL-triode-pentode
  189. pl500 based integrated OTL amplifier
  190. Capacitor dielectric - high impedance headphones
  191. REQUEST FOR OPINIONS
  192. Mysterious LCR phono preamp
  193. Eimac 100TL Output Transformers and Bias Point ?
  194. Tube deterioration
  195. Heathkit XO-1 power cords
  196. EF86 Push-Pull "power"-amp
  197. Transformers!?
  198. Weird ground loop problem
  199. Re-caping Cayin A70-T
  200. A3 attenuator help for an Aikido line amp
  201. Driver Tube Power Supply Question ?
  202. Line Stage vs. Phase Inverter - 12A*7
  203. Intermittent Buzz Decware Zen SE84Bged
  204. Tamura F2011/el34 x 4
  205. E88CC/6922 battery supply
  206. Aikido 9-pin all-in-1 headphone amp problem
  207. Filament Transformer Question ?
  208. Load Resistance, etc., chart for Class A push pull 6L6s?
  209. Question about preamp, boost and line-stage
  210. help please
  211. Practical phase inverter article
  212. Tube vs. Jfet Preamp for Dynaco ST-35 tube power amp
  213. Rio W-41 no sound
  214. Help: TDA1541A DAC Output To Tube Gainstage
  215. Pieter's take on an all DHT headphone amplifier.
  216. toroidal chokes
  217. Truly Silly Transformer Question
  218. Elementary resistance question
  219. Russian 310A + 300B
  220. 1959 RCA tube amplifier needs help
  221. What's going on?
  222. Aikido 9-pin All-in-one Testing question
  223. Gyrator in Tail of LTP
  224. tubemaster EL84
  225. Silly transformer question
  226. Marant 8b bias meter
  227. ElectroTone OrganMate spring reverb - mod suggestions?
  228. Opera Consonance resitor question ?
  229. ADI's Double Dyna
  230. DuMont Stereo Tube Console late 50's - What to do?
  231. No Sound from Magnavox EL 1484-1 amp/phono
  232. Elevated Heater Question
  233. 6P45S/EL509 input capacitance in triode mode
  234. 6E6p-e Little Tiny Wire
  235. another aikido ?
  236. NOS 6P3S-e or cheap new 5881? Identify this tube..
  237. Contan Audio from Melbourne Aus, any info?
  238. Loctal Base Post
  239. Timber amp with solid copper plate as earth and ground plane
  240. Dynaco ST70 - Which tubes do you like?
  241. 6SL7 in parallel driving 6550
  242. Will this work as a heater for 300b?
  243. Tube grid resistance for 6P45S, fine?
  244. Akido help pls
  245. BEARD P101 information
  246. Got some 6n3c-e (6p3s-e)with blank bulb?
  247. Graaf GM-20
  248. medium power OTL circlotron amplifier
  249. Help me identity this amp
  250. Hajdinjak preamp + 2x mono tube amp -What to do?

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