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  1. LEAK T12 and POINT ONE - worth having ?
  2. Quicksilvers Mid Mono Schematic?
  3. Russian & East European Tube Factory Logos
  4. Lampizator Channel
  5. RIAA triode or pentode
  6. Cute Little Tube Oscilloscope, Thought I'd share.
  7. Is it really possible to deliver 2W into 40 ohms with an SET ?
  8. se
  9. Connecting Two Amps to Common Input
  10. Wiring Aikido using LSA/HPA switch
  11. Most exotic SET power amplifier
  12. Help with rogers cadet 3 integrated
  13. Opamps for servos in tube amps - Christmas gift from LT, 12-12-12!
  14. tube amp hum........normal or suggested fix?
  15. Building a beast: Stereo EL84 auto bias PP tube amp
  16. Becker Brescia auto radio
  17. Double feedback pentode Power Stage
  18. Anyone Using Guiguang 300b tubes?
  19. Where to get Audio Note Gaku-On service manual?
  20. Sanity Check - Input Transformer Overshoot
  21. TOA HA-355 vintage tube PA amp schematic
  22. EL34 PushPull UL Amp
  23. 6L6G emission too high
  24. Need help designing BIAS circuit for old Bell amp
  25. Heathkit A-5A 6L6 PP Integrated Amp
  26. Where to put the meter
  27. Radii GS-40pp
  28. Concept dilemma (pre/pwr/spud content)
  29. What to do with these Eimac tubes?
  30. Driving 211 with VT25 or EL34?
  31. DIY AMP start project - Help choosing one
  32. Pilot 248B Amp with weak channel
  33. 6H30 VA stage?
  34. What is the best way to connect DC filaments?
  35. suggestions for a parallel feed 45 amp?
  36. Counterpoint SA 5.1 repairs
  37. The Morgan Jones mini tube headphone Amplifier
  38. Borbely headphone amp
  39. Found An Amplifier In My Basement I'd Forgotten About & Learn It's Sought After
  40. Floating OPT oscilloscope measuraments
  41. I Wasn't Away That Long, What's WIth The Price Hikes On All My Old Toys?
  42. Channel voltage mismatch
  43. OS70/1750 datasheets
  44. Beautiful Chassis
  45. 6A4, 46 and 47...excellent sound tubes !!!!
  46. Is it Overkill to use Duelund Caps in Power Stage (Counterpoint SA-5.1)
  47. Quicksilver M135 Schematic?
  48. recognize this old amp?
  49. grey fogging inside 6sn7
  50. Point to point or pcb?
  51. Quad query
  52. Fixing a Velleman K4040 - Buzz HIss Crackle Blown Tubes
  53. Found Original Genalex 12AX7..Need Advice..
  54. OPT power rating and amplifier power
  55. 6BG6-GA
  56. EL84 driving EL84 SET with fixed bias
  57. P2P 6CG7 Input Buffer
  58. 865 in triode mode...anyone ever tried it?
  59. PP KT88 Amp Low frequency Ringing
  60. World audio designs kel34
  61. Glassware Audio Design
  62. 2A3 mounted horizontally
  63. from tube amp to fm reciever
  64. diy tube amp
  65. Cary 805ae xlr option
  66. ST-70 mono makeover
  67. breaking in audio capacitors
  68. Question about 6V6GT amp schematic
  69. Sherwood Schematic
  70. Ever hear of a D7L1 or D7L3 YR7 tube?
  71. Psvane Replica RCA 2A3 tube - WR2A3
  72. 845 Driver Circuit
  73. ADJUSTABLE BIAS MOD KIT
  74. Gold Lion B749 12au7 Thoughts?
  75. Siliconray SRK 09 tube amp kit help
  76. Quantum minstrel
  77. Does anyone know how John Lee Hooker recorded this? (1949)
  78. Please Identify these black capacitors.
  79. New Tubes too silent (6P15P)
  80. best sounding & value amp kits/designs?
  81. Custom Woodwork For Tube Amp
  82. Tube 2E22 in triode mode
  83. Has anyone built an OTL amp with switch mode power supplies.
  84. Altec 15067 transformers
  85. Some interesting findings with transformers
  86. Bogen KO-60 Output Iron
  87. What would you do with Scott 222D IRON?
  88. Aikido vs CCDA
  89. wiring color code
  90. Maverick Audio TubeMagic D1 DAC
  91. Is one gz34 enough
  92. Edcor OPT opinions
  93. mengyue mini/ming da el34b
  94. I need a tube buffer circuit using a 12au7
  95. Stereo Amplifier Wood Enclosure
  96. What is the theoretical advantage of direct heated triodes?
  97. 6AS6 is useful for audio ?
  98. GM-70 design approach
  99. Ultimate emotion core material ( types of silicon steel , Permalloy or Amorphous etc)
  100. Looking to build my first tube amplifier
  101. Tube/SS opamp
  102. Biasing 6CA7/EL34 in Luxman LX33
  103. John Broskie MIA again?
  104. combine filament winding for rectifier
  105. HYBRID TUBE CFP
  106. 9302 Maggie Rebuild
  107. Pyramid-IX monoblock, 200W from 4x GU-50
  108. Suggestions of phono stage to build
  109. Do power transformers affect sound quality?
  110. Help with a Velleman K4040 ...
  111. Capacitor replacement confusion
  112. RCA PA Amplifer, Input Transformers
  113. Channel imbalance Xiang Sheng DAC-01
  114. ARC M100s
  115. pros & cons of current mirror to balance a push-pull ?
  116. Wright Audio WLA10 help needed
  117. The Best tube/valve sound!?
  118. Mcintosh MC1000 and Ming Da MC300-PRE
  119. Operating Modern 845s
  120. The Transcendent Sound Son of Beast OTL Master/Mod Thread.
  121. Neutralizing An Amplifier
  122. Stacked speakers driven by an SEP amp?
  123. Tube buffer suggestion for LM4702 amplifier?
  124. FWB Voltage Doubler with -Bias supply
  125. 500V SE pentode design
  126. single ended transformer driving 32ohm speaker
  127. uC based Tube Curve Tracer Kit - Experts Opinion ?
  128. 250K Attenuator
  129. Possible to drive PP EL34-triodes with a cathodyne phase-splitter?
  130. Daughters POD amp 13EM7 Pics
  131. Calculating Ripple Current with PSUD2
  132. Channel problem on 45 converted amp
  133. Want to make a tube preamp
  134. Marantz TC-5 choke value
  135. diference between schematics and pcb layout
  136. Would this work?
  137. Can old resistors go bad?
  138. Strange output tube behaviour
  139. Practical question: toroidal transformer / heater current / kt120
  140. Morgan Jones Power supply cap values
  141. Can use a ballast for a PSU??
  142. Looking for a OTL tube headphone amp design
  143. Relative Humidity Attenuating HF
  144. Parallel Output transformer question
  145. Need help to ID a tube...
  146. Modifications to Sennheiser VKS 203
  147. Onix SP3 integrated amp latest schematic
  148. Omit sp3 integrated amp latest schematic
  149. Help: Western Electric 102A Tube Datasheet and Test Settings
  150. Power and output transformer separated from amplifier
  151. discrete and simple VCCS
  152. heater wiring question
  153. What is the deal with Welborne Labs?
  154. Center Channel
  155. input stage problem help please!
  156. Tube Tips/Tricks for beginners
  157. Any skilled custom tube amplifier builders out there?
  158. Are these tubes really matched?
  159. Single Ended Amp
  160. Mighty Midget Problems
  161. Run the tube stuff in your car
  162. Jackson 648 test for 6973
  163. Space-charge tetrodes in Inverted Mode
  164. choosing input valve
  165. Rectifier characteristics
  166. Glass-ware?
  167. 5751 Mil spec tubes vrs 12AX7
  168. 47 pentode...fabulous sound !!!!
  169. Aikido preamp transformer question
  170. 40's tube receiver question
  171. W5m transformer
  172. Dual voltage PS filtering.
  173. OD3 150V tube regulator
  174. Fisher 500c
  175. Help with quad cap upgrade
  176. low voltage hybrid power amplifier
  177. Morgan Jones Kapacitors
  178. Which IR LED?
  179. Tube Frequency Response
  180. Big B+ voltage drop using diode rectifier.
  181. Triode ST70 kit schematic?
  182. 6AU6 replacement
  183. IT in cathode for driver class A2 tube
  184. Bogen MX30 Output Transformers
  185. Worlds Most Expensive Tube Amp !!!
  186. Blown screen resistor
  187. Blown screen resistor
  188. To ground plane or not?
  189. 5Z4PA Alternative?
  190. Question about chassis ground
  191. 6337- wtf is it?
  192. need ideers for a 6 channel amp
  193. sv572 transformer headache
  194. 6C33C / 6EM7
  195. 6146 TUBES ?
  196. Impedance matching
  197. QRP03 - Tube Buffered Gainclone
  198. Amp Cage Fababricators?
  199. PP KT88, Need help!
  200. Question regarding rectifier tube replacement
  201. Harmon Kardon A500
  202. Double triode 6SN7
  203. Tank's DIY tube preamp
  204. C core OPT for PP EL84
  205. amp diagram for KT88 and 300B on the same circuit
  206. Yaqin MS 34 D
  207. Tube buffer for amplifier with LM1875
  208. What is the best ?
  209. Fender DRRI tone
  210. DUKANE tube PA help
  211. Old tube? HELP RSE NP-7V-12 168810
  212. My first tube power amp
  213. Another mystery tube:
  214. Quad 22 Wiring
  215. Radford phase splitter again
  216. hookup wire source
  217. MCU adjustable fixed bias
  218. vr tube / glow tube as filter?
  219. Using phono stage only of preamp
  220. Correct settings for EBL21 and other tube on Hickok 539C
  221. Decca Portable Record Player model DPS8 Filter cap replacment
  222. 6V6 vs EL84 for output
  223. Realistic HK 210/Acrosound Stereo 120 Amp Schmatic/Manual Needed
  224. 2A3 with 12AT7
  225. Voltage rating of plate gyrator MOSFET
  226. Quad22 like preamplifier kit
  227. Push-pull implemented with KT88
  228. My QUAD 2 Restoration
  229. DIY High Power Car Tube Amp
  230. Perished insulation on transformer secondary - seems shorted. What can I do here?
  231. Need advice and help with new build
  232. Suggestions for a cheap Stereo Phono tube preamp based upon this power transformer?
  233. Determining imput impedence of a preamp line stage
  234. Newb question on 12AU7 gain stage
  235. Valve Preamplifier Help
  236. OPT choices - 6L6 PPP
  237. MESA STRATEGY 400
  238. Shuguang, Beijing or Shanghai EL84 ?
  239. CJ PV-5 tubes
  240. Reference tube amp kit, <20 watts for under $1,000?
  241. ccs power supply 310a
  242. At what point does it become a "hybrid" ?
  243. Line filters
  244. Step-up MC transformer for Audio Research SP 6C
  245. Psud help.
  246. MC Step-Up OTL Stage (grounded-grid) for MM RIAA Head Amps
  247. Repurposing heathkit s-2 electronic switch
  248. output cap bypass?
  249. 6e5p & 6c41 tube amplifier
  250. Looking for my first tube amp...

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