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  1. Panel Meter Install
  2. New Amp With Hum...
  3. EF184-6j51p Load by CCS or Resitor
  4. Slew rate.. Something doesn't make sense to me.
  5. HK Citation V question
  6. Modifying a tube regulator
  7. 6BG6 Push Pull Parallel Amp Build
  8. adapting a FU32 Tube amp for QQE 03/20 tubes?
  9. audio innovations 500 one channel down?
  10. Questions about found Mullard xf1's
  11. SE 6BL7
  12. Sound Valves M60 schematics needed
  13. el34 class a mod advice please
  14. 12AU7 Genuine or remarked
  15. MIT, Triode amp cathode resistor load line
  16. Marry tube preamplifier with 2-Band Wien bridge equalizer
  17. Oddball tube question
  18. Guitar amp screen resistor selection
  19. 6H2n-EB Strange Codes??
  20. Triode Dick's KT88 PP Amp.
  21. Curves to EL 502 and EL 300
  22. Input level 1/2 ECC83 + EL84
  23. SMPS for valve design
  24. Cincinatti Mac Amps
  25. ss rectifier filter recommendate
  26. Determining plate current with non-standard screen grid voltages
  27. allnic hpa-5000
  28. Hodgepodge build
  29. Power Transformer weirdness/wiring problem
  30. Question trafo for Broskie Janus PSU
  31. Copland CVA-306 tube and output capacitor replacement
  32. Choice of Output Transformer
  33. Jumping in with both feet
  34. Large 9pin socket needed
  35. Line-up of old and currently produced RIAA Stages with tubes wanted (like EAR-834)
  36. Question about 6P31S
  37. 6N16B Aikido Cathode Resistors
  38. 1KV umbilical cords.... and other HV issues
  39. 300b Bewitch Amp Blows Fuses
  40. Dynaco ST-70
  41. Front-end topologies for PP
  42. tranformers
  43. How many LesBox units exist out there?
  44. Old Sylvania black-plate bent getter 12au7s
  45. Phono / pre amp section schematic suggestions
  46. 4P1L in parallel Single Ended
  47. Pair of Ampex 620 amps
  48. My SE 6S4S
  49. chinese ebay 12au7 + 6dj8 white cathode follower preamp boards?
  50. "chirp" when power up amplifier
  51. Modified Dynaco PAS Phono
  52. Filter Chokes wired for CMR
  53. Capacitors / K12G Tube Amp
  54. Sansui SM-30
  55. RCA Phono Preamplifier with 12ax7
  56. separate filament transformer for 5u4g?
  57. EL34 Triode strapped amplifier
  58. Testing emission without risk
  59. Anyone Build the Borbely 15W 6C33C SE?
  60. Cheap and upgradable preamp
  61. Source for least expensive tubes.
  62. 5 Pin Tube Socket Suggestions Please
  63. UXCV-11 plates?
  64. Top 5 Most Popular Tube Base
  65. 6C33C and Computer PSU
  66. Output transformer impedance for a 4P1L PSE
  67. Specs of old output transformer
  68. altec 1570b
  69. Mixed tube and ss stages grounding. Best practice?
  70. Any news from Tribute?
  71. What are this....a tube or lamp or etc?
  72. duff tube? Little Bear P1
  73. Opinion on amp build
  74. K12G For Mom & Dad
  75. RIAA Network Position
  76. 6k5GT - Good Tube Curves?
  77. 5902 pentode datasheet confusion
  78. Hum in one channel on Headphone Amp
  79. KT24 datasheet, help !!!
  80. Chicago Standard Transformer Company OPT's
  81. Help on repairing messed up AMC CVT3030
  82. Anyone traced triode curves for the 6CZ5?
  83. anthem pre-1
  84. split supply for tubes
  85. Rufus p. Turner AC-DC amp
  86. 1937 Philco Radio Amp - Build Thread
  87. Transformers for valve headphone amps
  88. Help with negative feedback
  89. Silicon Diode Measurement Confusion
  90. grommet against vibrations
  91. Help with a Moscode 300
  92. Help Identifying Valve Amplifier
  93. capacitors
  94. Questions about console parts salvaging
  95. Regarding EDCOR Transformer Data
  96. PYE mozart
  97. Tube swapping with my Condensor Mic
  98. found amp - identity unknown
  99. how to low the gain
  100. VTL TL-2 tube preamp
  101. Need Advice for Bi-amping
  102. Baldwin organ amp
  103. Octal Aikido with gain/buffer switch?
  104. Harman Kardon Stereo Tube Amp Oscillator Help!
  105. Electro-Harmonex 6973 Question
  106. Power and plate current in a SE amp
  107. 6883B for use as a audio output tube
  108. "Distortionless" Tube Oscillator -Cutting Edge Technology
  109. Feedback RH84 6v6
  110. copper wire from socket bolts to exhaust tip?
  111. What KT88 brands can handle high B+ triode connected?
  112. Williamson-style circuit with Schade feedback using pentode driver stage?
  113. potentiometer for blackface deluxe reverb
  114. GM70 tube copper vs graphite plate???
  115. +/-floating tube PSU for guitar ?! Schematic error ?
  116. About Dark Heater Tubes.
  117. Sylvania 5692 Black base tubes
  118. Tube Tester in Montreal
  119. tubelab.com's super tube SE
  120. Unsual use of triode?
  121. What the hell is Class A3 ?
  122. High voltage triodes (true triodes)
  123. Ceramic Filter Selection
  124. Eagle library for CMC teflon 9-pin tube socket?
  125. Power supply mosfet vs choke filter
  126. Capacitors used in Conrad Johnson PV7
  127. HH Scott 299A center out to subwoofer
  128. PP Amplifier Advice Sought: EL34/KT88 UL/Triode
  129. Search for StepUp 12V->142V @ 6mA
  130. Magnavox 8802 upgrade suggestions?
  131. filament supply using two bridges
  132. 6N2P-EV gain factor ??
  133. Talking tube replacements
  134. Audi Institute VR70E amp
  135. Share Fixed Bias using Diodes
  136. Finished my Tube DI/Preamp
  137. Arcturus Blue Tubes
  138. share your experience on sound of hybrid amps
  139. ideas for a simple ECL82/86 p-p amp?
  140. Tube replacements or substitution
  141. 12ax7 / 12au7
  142. Triode/Pentode Loadline Calculator
  143. Troubleshooting a Fender Champion 600
  144. High Voltage Derived Bias Supply
  145. Universal hybrid triode-mosfet input/drive stage
  146. IT coupled 1624 or 807 amp
  147. Raytheon / Western Electric JW-5755 / 420A
  148. Calculate unknown operating point from known cathode resistor
  149. 5763 triode curves
  150. HICKOK 539a QUESTION
  151. Constant current heaters
  152. max G2 voltage 1624 tube (Tabor)
  153. Need reference for Dynaco MKIV amp build
  154. Biasing Valve on Bipolar Power Supply
  155. Tubelab sse choke input 6v6
  156. $1800 tube amp
  157. Testing a 6N3 5670 etc on a B&K 600 tester
  158. Could anyone shed any light on this amp for me?
  159. Translation Russian EL84SE design please?
  160. Determining plate and screen voltage
  161. I Don't want to set the forum on fire . . .
  162. Valab Ultra Low Noise Regulatible
  163. Westinghouse 6973 Tube
  164. Which is worth burning or keeping
  165. OPT position
  166. Remove volume pot
  167. Headphone amp ideas?
  168. Good Looking 6SN7
  169. UTC Transformer
  170. Cap substitution help
  171. Edcor replacement for w5m peerless opt
  172. Audyn True copper caps.
  173. No Feedback Balanced Line Design
  174. KT120 PP - "low power" baptized Vitruvian amplifier
  175. Senior Design Project
  176. Hovland Sapphire guidance needed
  177. Question about specialized OPT
  178. My first build tubelab SE
  179. k16ls tube amp on/off switch?
  180. SY Tube Phono Improvements?
  181. Tube newbie, anyone familar with s-5 k-502? Help needed please
  182. TVA-1 Michaelson & Austin with problems
  183. New to HIFI tube need advice
  184. Crosstalk between Triodes in Dual Triode Tubes
  185. 6L6GC instead of EL34
  186. Schade feedback and CFB
  187. Sansui AU-70 - Help Needed
  188. Pentode C.F, where to connect the suppressor grid ?
  189. Separate PSU for PP EL34 / 6SN7GT integrated amp
  190. Simple SE driver with mosfet (6sn7/307A) IRF820
  191. Is it safe to run pentode w/ no screen voltage for a min?
  192. Low B+ and CCS question
  193. Has anyone ever used slate in audio?
  194. Semi-Fixed Bias?
  195. Transformers MIC and Phono
  196. Russian capacitor markings
  197. 6L6GC...More Voltage...or More Current?
  198. help me
  199. Anybody built/heard Melquiades amp
  200. Elevated grid bias
  201. Oscillation found in Luxman LX33
  202. RCA phono amp project
  203. Test of 45 Triode with EICO 625?
  204. Standard Silicon Diode Rectifier's VS Ultra Fast
  205. Output Transformer for L3 pre Audio Note
  206. "Boosted" Triode operation?
  207. 6HB6 UL push pull amp
  208. Interstage transformer ratio, spacecharge tubes in PP
  209. 6N6P line stage
  210. Revamping Tube Amp Monoblock - capacitor grounding concern
  211. 845 set bias.
  212. How to improve on a working Hybrid Amp: 832A Tube with MOSFETs
  213. tube outputs
  214. Coupling Cap Consistency
  215. Volume adjustment on 8ch at once
  216. Sub minature tube gain stage question.
  217. DHT PSE 2A3
  218. Plate voltage mic pre
  219. Estimating load for Duncan Amps PSU tool HOWTO?
  220. Shuguang Treasure Series 300B-Z not satisfactory!
  221. Choosing OP of small signal tubes with CCS in the cathode
  222. Aikido help needed
  223. Exploding 300B
  224. power output of EL34
  225. 76tube into C3M (triode) via LL1660 to PP outputstage
  226. best operating points for e182cc tube
  227. Any thoughts about this volume/bal arrangement
  228. Filament tension spring material
  229. DC coupled SE SChade amp
  230. First build 6V6 based
  231. Failed Converting UL to Pentode!?
  232. 1955 kids record player hum puzzle
  233. subwoofer output from my tube preamp
  234. EL84 SE Amp - specific transformer
  235. "GOOD" backup KT-88
  236. New or Old Output Transformer?
  237. Motorola console recap question
  238. Plate voltage on preamp tube too high
  239. Good valve design calculator website
  240. Ultra-on push-pull tetrode 6550
  241. My introduction to tube amps. The good, the bad, and the ugly.
  242. How do I calculate local feedback %?
  243. Newbie greeting & Resource
  244. Tips/Help With a Dying OTL Headphone Amp
  245. 6B4G and ECC83
  246. Maron buys a tube amp
  247. Newbie
  248. 845 AC filaments, my experience
  249. 8552 finals ?
  250. Low voltage 3W S.E. little amp, need comments and suggestions

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