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  1. Help: Tubes for my amp
  2. McIntosh mc40 power transformer
  3. Counterpoint SA-1 preamp schematics?
  4. What would a larger OPT get me?
  5. National VP-311C Tubescope help...
  6. 12AU7 - 12.6V DC heater wiring - noob
  7. I bought a box of tubes at an estate sale today
  8. Thermistors to prevent heater current inrush?
  9. can SE bass be as good as PP ?
  10. 2A3 cathode resistor/cap question
  11. class a output ct basic question
  12. Recent popularity of Leak TL-12
  13. bleeder resistor placement w/ power supply choke
  14. cd burner hum w tube stereo
  15. Clipping - Saturation or Mismatching Impedance?
  16. Transformer for K12g tube amp
  17. PowerTrannyHeatRemovalViaHeatSinkRadiatorPassive
  18. "Novel" push pull driver circuit
  19. Feedback lead/lag compensation
  20. help with Signature Technology mono amp
  21. 7591
  22. EL34 integrated amp power loss
  23. Use treble or bass amp for midrange?
  24. Question about a SET 2A3/45
  25. western electric 124 amplifier
  26. el34 power loss in right channel
  27. Ei Silver Plate 12AX7 cathode color ?
  28. Does parafeed really improve sound?
  29. Can I use this choke
  30. Calculating 6922/E88CC/ECC88 cathode follower for 90V anode
  31. ST70 coupling caps eyelet location on PC-3?
  32. Some help with PCL86 Headphone amp Project
  33. Top (sound) quality valve phono stage
  34. Calculating cathode follower using 12AU7 for 90V supply
  35. Cathode resistor
  36. Help with an old Capitol
  37. Cathode bypass cap
  38. balanced post-OT line output?
  39. Blown SE mono, troubleshoot
  40. What is this circuit for?
  41. Siemens EL 86 NOS?
  42. Valve Operational Amplifiers
  43. What will be the best drive to 211 tube?
  44. Dual 845 SE A2 questions
  45. Harman Kardon Citation I, II, & III (Special thanks to Jim McShane and Eli Duttman!)
  46. Heater rewiring from 6N2 to 12AX7 with 6.3VAC
  47. heater bias value
  48. the hum or is it a siliconray kit
  49. DC Automatic Bias Control - Auto fixed bias
  50. What makes an OT a good OT for audiophile and need suggestion.
  51. The totally capless DHT SET amp - 300B or others
  52. Angled Socket brackets?
  53. Octal or loctal tubes as cathode follower?
  54. Used int amp please help to figured out?
  55. Rod Coleman heat sink question
  56. Tubelab SE + Fostex fe206en vs room size! suggestions needed please!
  57. ef86 pentode/triode switch: voltage rating?
  58. Input to pre-amp
  59. EML 300B
  60. Need suggestion in building a stereo power amp
  61. VALVO EL84 and ECC83 TELEFUNKEN ID?
  62. Bogen E-75 tube amp
  63. Quad II amplifier needed for parts
  64. Low voltage 6N1P RIAA?
  65. Does anybody collect vacuum tube ADV
  66. HDMI connection causes hum on Quad 303
  67. ECC81/12AT7 "sweet spot"
  68. Phono Preamp Hum
  69. Benefits of high voltage source for preamp
  70. Auto Bias
  71. Thomas Mayer Sound Processor pics
  72. Have you used the 15A6 pentode as an audio output tube ?
  73. Can I use a 5 volts tap for 6SN7 heaters?
  74. Any opinions about this tube amp kit ?
  75. 300B odd behaviour
  76. Aikido starter help requested
  77. 10Y FILAMENT VOLTAGE MARGIN
  78. Wiring a multitap transformer. Help needed
  79. A directly heated pentode folded cascode
  80. Zener Power Supply Clamp
  81. SPICE Simulator Giving Negative Gain
  82. SE 811 amp schematic...
  83. Philco Labled 12AU7A black-plate 45' halo getter- Raytheon??
  84. My FrankenAmp
  85. Panel Meter Install
  86. New Amp With Hum...
  87. EF184-6j51p Load by CCS or Resitor
  88. Slew rate.. Something doesn't make sense to me.
  89. HK Citation V question
  90. Modifying a tube regulator
  91. 6BG6 Push Pull Parallel Amp Build
  92. adapting a FU32 Tube amp for QQE 03/20 tubes?
  93. audio innovations 500 one channel down?
  94. Questions about found Mullard xf1's
  95. SE 6BL7
  96. Sound Valves M60 schematics needed
  97. el34 class a mod advice please
  98. 12AU7 Genuine or remarked
  99. MIT, Triode amp cathode resistor load line
  100. Marry tube preamplifier with 2-Band Wien bridge equalizer
  101. Oddball tube question
  102. 6H2n-EB Strange Codes??
  103. Triode Dick's KT88 PP Amp.
  104. Curves to EL 502 and EL 300
  105. Input level 1/2 ECC83 + EL84
  106. Cincinatti Mac Amps
  107. ss rectifier filter recommendate
  108. Determining plate current with non-standard screen grid voltages
  109. allnic hpa-5000
  110. Hodgepodge build
  111. Power Transformer weirdness/wiring problem
  112. Question trafo for Broskie Janus PSU
  113. Copland CVA-306 tube and output capacitor replacement
  114. Choice of Output Transformer
  115. Jumping in with both feet
  116. Large 9pin socket needed
  117. Line-up of old and currently produced RIAA Stages with tubes wanted (like EAR-834)
  118. Question about 6P31S
  119. 6N16B Aikido Cathode Resistors
  120. 1KV umbilical cords.... and other HV issues
  121. 300b Bewitch Amp Blows Fuses
  122. Dynaco ST-70
  123. Front-end topologies for PP
  124. tranformers
  125. How many LesBox units exist out there?
  126. Old Sylvania black-plate bent getter 12au7s
  127. Phono / pre amp section schematic suggestions
  128. 4P1L in parallel Single Ended
  129. Pair of Ampex 620 amps
  130. My SE 6S4S
  131. chinese ebay 12au7 + 6dj8 white cathode follower preamp boards?
  132. "chirp" when power up amplifier
  133. Modified Dynaco PAS Phono
  134. Filter Chokes wired for CMR
  135. Capacitors / K12G Tube Amp
  136. Sansui SM-30
  137. RCA Phono Preamplifier with 12ax7
  138. separate filament transformer for 5u4g?
  139. EL34 Triode strapped amplifier
  140. Testing emission without risk
  141. Anyone Build the Borbely 15W 6C33C SE?
  142. Cheap and upgradable preamp
  143. Source for least expensive tubes.
  144. 5 Pin Tube Socket Suggestions Please
  145. UXCV-11 plates?
  146. Top 5 Most Popular Tube Base
  147. 6C33C and Computer PSU
  148. Output transformer impedance for a 4P1L PSE
  149. Specs of old output transformer
  150. altec 1570b
  151. Mixed tube and ss stages grounding. Best practice?
  152. Any news from Tribute?
  153. What are this....a tube or lamp or etc?
  154. duff tube? Little Bear P1
  155. Opinion on amp build
  156. K12G For Mom & Dad
  157. RIAA Network Position
  158. 6k5GT - Good Tube Curves?
  159. 5902 pentode datasheet confusion
  160. Hum in one channel on Headphone Amp
  161. KT24 datasheet, help !!!
  162. Chicago Standard Transformer Company OPT's
  163. Help on repairing messed up AMC CVT3030
  164. Anyone traced triode curves for the 6CZ5?
  165. anthem pre-1
  166. split supply for tubes
  167. Rufus p. Turner AC-DC amp
  168. 1937 Philco Radio Amp - Build Thread
  169. Transformers for valve headphone amps
  170. Help with negative feedback
  171. Silicon Diode Measurement Confusion
  172. grommet against vibrations
  173. Help with a Moscode 300
  174. Help Identifying Valve Amplifier
  175. capacitors
  176. Questions about console parts salvaging
  177. Regarding EDCOR Transformer Data
  178. PYE mozart
  179. Tube swapping with my Condensor Mic
  180. found amp - identity unknown
  181. how to low the gain
  182. VTL TL-2 tube preamp
  183. Need Advice for Bi-amping
  184. Baldwin organ amp
  185. Octal Aikido with gain/buffer switch?
  186. Harman Kardon Stereo Tube Amp Oscillator Help!
  187. Electro-Harmonex 6973 Question
  188. Power and plate current in a SE amp
  189. 6883B for use as a audio output tube
  190. "Distortionless" Tube Oscillator -Cutting Edge Technology
  191. Feedback RH84 6v6
  192. copper wire from socket bolts to exhaust tip?
  193. What KT88 brands can handle high B+ triode connected?
  194. Williamson-style circuit with Schade feedback using pentode driver stage?
  195. GM70 tube copper vs graphite plate???
  196. About Dark Heater Tubes.
  197. Sylvania 5692 Black base tubes
  198. Tube Tester in Montreal
  199. tubelab.com's super tube SE
  200. Unsual use of triode?
  201. What the hell is Class A3 ?
  202. High voltage triodes (true triodes)
  203. Ceramic Filter Selection
  204. Eagle library for CMC teflon 9-pin tube socket?
  205. Power supply mosfet vs choke filter
  206. Capacitors used in Conrad Johnson PV7
  207. HH Scott 299A center out to subwoofer
  208. PP Amplifier Advice Sought: EL34/KT88 UL/Triode
  209. Search for StepUp 12V->142V @ 6mA
  210. Magnavox 8802 upgrade suggestions?
  211. filament supply using two bridges
  212. 6N2P-EV gain factor ??
  213. Talking tube replacements
  214. Audi Institute VR70E amp
  215. Share Fixed Bias using Diodes
  216. Finished my Tube DI/Preamp
  217. Arcturus Blue Tubes
  218. share your experience on sound of hybrid amps
  219. ideas for a simple ECL82/86 p-p amp?
  220. Tube replacements or substitution
  221. 12ax7 / 12au7
  222. Triode/Pentode Loadline Calculator
  223. High Voltage Derived Bias Supply
  224. Universal hybrid triode-mosfet input/drive stage
  225. IT coupled 1624 or 807 amp
  226. Raytheon / Western Electric JW-5755 / 420A
  227. Calculate unknown operating point from known cathode resistor
  228. 5763 triode curves
  229. HICKOK 539a QUESTION
  230. Constant current heaters
  231. max G2 voltage 1624 tube (Tabor)
  232. Need reference for Dynaco MKIV amp build
  233. Biasing Valve on Bipolar Power Supply
  234. Tubelab sse choke input 6v6
  235. $1800 tube amp
  236. Testing a 6N3 5670 etc on a B&K 600 tester
  237. Could anyone shed any light on this amp for me?
  238. Translation Russian EL84SE design please?
  239. Determining plate and screen voltage
  240. I Don't want to set the forum on fire . . .
  241. Valab Ultra Low Noise Regulatible
  242. Westinghouse 6973 Tube
  243. Which is worth burning or keeping
  244. OPT position
  245. Remove volume pot
  246. Headphone amp ideas?
  247. Good Looking 6SN7
  248. UTC Transformer
  249. Cap substitution help
  250. Edcor replacement for w5m peerless opt

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