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  1. adapting a FU32 Tube amp for QQE 03/20 tubes?
  2. audio innovations 500 one channel down?
  3. Questions about found Mullard xf1's
  4. SE 6BL7
  5. Sound Valves M60 schematics needed
  6. el34 class a mod advice please
  7. 12AU7 Genuine or remarked
  8. MIT, Triode amp cathode resistor load line
  9. Marry tube preamplifier with 2-Band Wien bridge equalizer
  10. Oddball tube question
  11. Guitar amp screen resistor selection
  12. 6H2n-EB Strange Codes??
  13. Triode Dick's KT88 PP Amp.
  14. Curves to EL 502 and EL 300
  15. Input level 1/2 ECC83 + EL84
  16. SMPS for valve design
  17. Cincinatti Mac Amps
  18. ss rectifier filter recommendate
  19. Determining plate current with non-standard screen grid voltages
  20. allnic hpa-5000
  21. Hodgepodge build
  22. Power Transformer weirdness/wiring problem
  23. Question trafo for Broskie Janus PSU
  24. Copland CVA-306 tube and output capacitor replacement
  25. Choice of Output Transformer
  26. Jumping in with both feet
  27. Large 9pin socket needed
  28. Line-up of old and currently produced RIAA Stages with tubes wanted (like EAR-834)
  29. Question about 6P31S
  30. 6N16B Aikido Cathode Resistors
  31. 1KV umbilical cords.... and other HV issues
  32. 300b Bewitch Amp Blows Fuses
  33. Dynaco ST-70
  34. Front-end topologies for PP
  35. tranformers
  36. How many LesBox units exist out there?
  37. Old Sylvania black-plate bent getter 12au7s
  38. Phono / pre amp section schematic suggestions
  39. 4P1L in parallel Single Ended
  40. Pair of Ampex 620 amps
  41. My SE 6S4S
  42. chinese ebay 12au7 + 6dj8 white cathode follower preamp boards?
  43. "chirp" when power up amplifier
  44. Modified Dynaco PAS Phono
  45. Filter Chokes wired for CMR
  46. Capacitors / K12G Tube Amp
  47. Sansui SM-30
  48. RCA Phono Preamplifier with 12ax7
  49. separate filament transformer for 5u4g?
  50. EL34 Triode strapped amplifier
  51. Testing emission without risk
  52. Anyone Build the Borbely 15W 6C33C SE?
  53. Cheap and upgradable preamp
  54. Source for least expensive tubes.
  55. 5 Pin Tube Socket Suggestions Please
  56. UXCV-11 plates?
  57. Top 5 Most Popular Tube Base
  58. 6C33C and Computer PSU
  59. Output transformer impedance for a 4P1L PSE
  60. Specs of old output transformer
  61. altec 1570b
  62. Mixed tube and ss stages grounding. Best practice?
  63. Any news from Tribute?
  64. What are this....a tube or lamp or etc?
  65. duff tube? Little Bear P1
  66. Opinion on amp build
  67. K12G For Mom & Dad
  68. RIAA Network Position
  69. 6k5GT - Good Tube Curves?
  70. 5902 pentode datasheet confusion
  71. Hum in one channel on Headphone Amp
  72. KT24 datasheet, help !!!
  73. Chicago Standard Transformer Company OPT's
  74. Help on repairing messed up AMC CVT3030
  75. Anyone traced triode curves for the 6CZ5?
  76. anthem pre-1
  77. split supply for tubes
  78. Rufus p. Turner AC-DC amp
  79. 1937 Philco Radio Amp - Build Thread
  80. Transformers for valve headphone amps
  81. Help with negative feedback
  82. Silicon Diode Measurement Confusion
  83. grommet against vibrations
  84. Help with a Moscode 300
  85. Help Identifying Valve Amplifier
  86. capacitors
  87. Questions about console parts salvaging
  88. Regarding EDCOR Transformer Data
  89. PYE mozart
  90. Tube swapping with my Condensor Mic
  91. found amp - identity unknown
  92. how to low the gain
  93. VTL TL-2 tube preamp
  94. Need Advice for Bi-amping
  95. Baldwin organ amp
  96. Octal Aikido with gain/buffer switch?
  97. Harman Kardon Stereo Tube Amp Oscillator Help!
  98. Electro-Harmonex 6973 Question
  99. Power and plate current in a SE amp
  100. 6883B for use as a audio output tube
  101. "Distortionless" Tube Oscillator -Cutting Edge Technology
  102. Feedback RH84 6v6
  103. copper wire from socket bolts to exhaust tip?
  104. What KT88 brands can handle high B+ triode connected?
  105. Williamson-style circuit with Schade feedback using pentode driver stage?
  106. potentiometer for blackface deluxe reverb
  107. GM70 tube copper vs graphite plate???
  108. +/-floating tube PSU for guitar ?! Schematic error ?
  109. About Dark Heater Tubes.
  110. Sylvania 5692 Black base tubes
  111. Tube Tester in Montreal
  112. tubelab.com's super tube SE
  113. Unsual use of triode?
  114. What the hell is Class A3 ?
  115. High voltage triodes (true triodes)
  116. Ceramic Filter Selection
  117. Eagle library for CMC teflon 9-pin tube socket?
  118. Power supply mosfet vs choke filter
  119. Capacitors used in Conrad Johnson PV7
  120. HH Scott 299A center out to subwoofer
  121. PP Amplifier Advice Sought: EL34/KT88 UL/Triode
  122. Search for StepUp 12V->142V @ 6mA
  123. Magnavox 8802 upgrade suggestions?
  124. filament supply using two bridges
  125. 6N2P-EV gain factor ??
  126. Talking tube replacements
  127. Audi Institute VR70E amp
  128. Share Fixed Bias using Diodes
  129. Finished my Tube DI/Preamp
  130. Arcturus Blue Tubes
  131. share your experience on sound of hybrid amps
  132. ideas for a simple ECL82/86 p-p amp?
  133. Tube replacements or substitution
  134. 12ax7 / 12au7
  135. Triode/Pentode Loadline Calculator
  136. Troubleshooting a Fender Champion 600
  137. High Voltage Derived Bias Supply
  138. Universal hybrid triode-mosfet input/drive stage
  139. IT coupled 1624 or 807 amp
  140. Raytheon / Western Electric JW-5755 / 420A
  141. Calculate unknown operating point from known cathode resistor
  142. 5763 triode curves
  143. HICKOK 539a QUESTION
  144. Constant current heaters
  145. max G2 voltage 1624 tube (Tabor)
  146. Need reference for Dynaco MKIV amp build
  147. Biasing Valve on Bipolar Power Supply
  148. Tubelab sse choke input 6v6
  149. $1800 tube amp
  150. Testing a 6N3 5670 etc on a B&K 600 tester
  151. Could anyone shed any light on this amp for me?
  152. Translation Russian EL84SE design please?
  153. Determining plate and screen voltage
  154. I Don't want to set the forum on fire . . .
  155. Valab Ultra Low Noise Regulatible
  156. Westinghouse 6973 Tube
  157. Which is worth burning or keeping
  158. OPT position
  159. Remove volume pot
  160. Headphone amp ideas?
  161. Good Looking 6SN7
  162. UTC Transformer
  163. Cap substitution help
  164. Edcor replacement for w5m peerless opt
  165. Audyn True copper caps.
  166. No Feedback Balanced Line Design
  167. KT120 PP - "low power" baptized Vitruvian amplifier
  168. Senior Design Project
  169. Hovland Sapphire guidance needed
  170. Question about specialized OPT
  171. My first build tubelab SE
  172. k16ls tube amp on/off switch?
  173. SY Tube Phono Improvements?
  174. Tube newbie, anyone familar with s-5 k-502? Help needed please
  175. TVA-1 Michaelson & Austin with problems
  176. New to HIFI tube need advice
  177. Crosstalk between Triodes in Dual Triode Tubes
  178. 6L6GC instead of EL34
  179. Schade feedback and CFB
  180. Sansui AU-70 - Help Needed
  181. Pentode C.F, where to connect the suppressor grid ?
  182. Separate PSU for PP EL34 / 6SN7GT integrated amp
  183. Simple SE driver with mosfet (6sn7/307A) IRF820
  184. Is it safe to run pentode w/ no screen voltage for a min?
  185. Low B+ and CCS question
  186. Has anyone ever used slate in audio?
  187. Semi-Fixed Bias?
  188. Transformers MIC and Phono
  189. Russian capacitor markings
  190. 6L6GC...More Voltage...or More Current?
  191. help me
  192. Anybody built/heard Melquiades amp
  193. Elevated grid bias
  194. Oscillation found in Luxman LX33
  195. RCA phono amp project
  196. Test of 45 Triode with EICO 625?
  197. Standard Silicon Diode Rectifier's VS Ultra Fast
  198. Output Transformer for L3 pre Audio Note
  199. "Boosted" Triode operation?
  200. 6HB6 UL push pull amp
  201. Interstage transformer ratio, spacecharge tubes in PP
  202. 6N6P line stage
  203. Revamping Tube Amp Monoblock - capacitor grounding concern
  204. 845 set bias.
  205. How to improve on a working Hybrid Amp: 832A Tube with MOSFETs
  206. tube outputs
  207. Coupling Cap Consistency
  208. Volume adjustment on 8ch at once
  209. Sub minature tube gain stage question.
  210. DHT PSE 2A3
  211. Plate voltage mic pre
  212. Estimating load for Duncan Amps PSU tool HOWTO?
  213. Shuguang Treasure Series 300B-Z not satisfactory!
  214. Choosing OP of small signal tubes with CCS in the cathode
  215. Aikido help needed
  216. Exploding 300B
  217. power output of EL34
  218. 76tube into C3M (triode) via LL1660 to PP outputstage
  219. best operating points for e182cc tube
  220. Any thoughts about this volume/bal arrangement
  221. Filament tension spring material
  222. DC coupled SE SChade amp
  223. First build 6V6 based
  224. Failed Converting UL to Pentode!?
  225. 1955 kids record player hum puzzle
  226. subwoofer output from my tube preamp
  227. EL84 SE Amp - specific transformer
  228. "GOOD" backup KT-88
  229. New or Old Output Transformer?
  230. Motorola console recap question
  231. Plate voltage on preamp tube too high
  232. Good valve design calculator website
  233. Ultra-on push-pull tetrode 6550
  234. My introduction to tube amps. The good, the bad, and the ugly.
  235. How do I calculate local feedback %?
  236. Newbie greeting & Resource
  237. Tips/Help With a Dying OTL Headphone Amp
  238. 6B4G and ECC83
  239. Maron buys a tube amp
  240. Newbie
  241. 845 AC filaments, my experience
  242. 8552 finals ?
  243. Low voltage 3W S.E. little amp, need comments and suggestions
  244. Single ended push pull ultra linear or?...
  245. Hello and questions about Magnavox SE amp
  246. Amp identification
  247. Millett DCPP No Output.
  248. using a Hammond 835 interstage ?
  249. Recommendation on versitile tube tester
  250. Mullard 6SN7GT

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