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  1. My SE 6S4S
  2. chinese ebay 12au7 + 6dj8 white cathode follower preamp boards?
  3. "chirp" when power up amplifier
  4. Modified Dynaco PAS Phono
  5. Filter Chokes wired for CMR
  6. Capacitors / K12G Tube Amp
  7. Sansui SM-30
  8. RCA Phono Preamplifier with 12ax7
  9. separate filament transformer for 5u4g?
  10. EL34 Triode strapped amplifier
  11. Testing emission without risk
  12. Anyone Build the Borbely 15W 6C33C SE?
  13. Cheap and upgradable preamp
  14. Source for least expensive tubes.
  15. 5 Pin Tube Socket Suggestions Please
  16. UXCV-11 plates?
  17. Top 5 Most Popular Tube Base
  18. 6C33C and Computer PSU
  19. Output transformer impedance for a 4P1L PSE
  20. Specs of old output transformer
  21. altec 1570b
  22. Mixed tube and ss stages grounding. Best practice?
  23. Any news from Tribute?
  24. What are this....a tube or lamp or etc?
  25. duff tube? Little Bear P1
  26. Opinion on amp build
  27. K12G For Mom & Dad
  28. RIAA Network Position
  29. 6k5GT - Good Tube Curves?
  30. 5902 pentode datasheet confusion
  31. Hum in one channel on Headphone Amp
  32. KT24 datasheet, help !!!
  33. Chicago Standard Transformer Company OPT's
  34. Help on repairing messed up AMC CVT3030
  35. Anyone traced triode curves for the 6CZ5?
  36. anthem pre-1
  37. split supply for tubes
  38. Rufus p. Turner AC-DC amp
  39. 1937 Philco Radio Amp - Build Thread
  40. Transformers for valve headphone amps
  41. Help with negative feedback
  42. Silicon Diode Measurement Confusion
  43. grommet against vibrations
  44. Help with a Moscode 300
  45. Help Identifying Valve Amplifier
  46. capacitors
  47. Questions about console parts salvaging
  48. Regarding EDCOR Transformer Data
  49. PYE mozart
  50. Tube swapping with my Condensor Mic
  51. found amp - identity unknown
  52. how to low the gain
  53. VTL TL-2 tube preamp
  54. Need Advice for Bi-amping
  55. Baldwin organ amp
  56. Octal Aikido with gain/buffer switch?
  57. Harman Kardon Stereo Tube Amp Oscillator Help!
  58. Electro-Harmonex 6973 Question
  59. Power and plate current in a SE amp
  60. 6883B for use as a audio output tube
  61. "Distortionless" Tube Oscillator -Cutting Edge Technology
  62. Feedback RH84 6v6
  63. copper wire from socket bolts to exhaust tip?
  64. What KT88 brands can handle high B+ triode connected?
  65. Williamson-style circuit with Schade feedback using pentode driver stage?
  66. GM70 tube copper vs graphite plate???
  67. About Dark Heater Tubes.
  68. Sylvania 5692 Black base tubes
  69. Tube Tester in Montreal
  70. tubelab.com's super tube SE
  71. Unsual use of triode?
  72. What the hell is Class A3 ?
  73. High voltage triodes (true triodes)
  74. Ceramic Filter Selection
  75. Eagle library for CMC teflon 9-pin tube socket?
  76. Power supply mosfet vs choke filter
  77. Capacitors used in Conrad Johnson PV7
  78. HH Scott 299A center out to subwoofer
  79. PP Amplifier Advice Sought: EL34/KT88 UL/Triode
  80. Search for StepUp 12V->142V @ 6mA
  81. Magnavox 8802 upgrade suggestions?
  82. filament supply using two bridges
  83. 6N2P-EV gain factor ??
  84. Talking tube replacements
  85. Audi Institute VR70E amp
  86. Share Fixed Bias using Diodes
  87. Finished my Tube DI/Preamp
  88. Arcturus Blue Tubes
  89. share your experience on sound of hybrid amps
  90. ideas for a simple ECL82/86 p-p amp?
  91. Tube replacements or substitution
  92. 12ax7 / 12au7
  93. Triode/Pentode Loadline Calculator
  94. High Voltage Derived Bias Supply
  95. Universal hybrid triode-mosfet input/drive stage
  96. IT coupled 1624 or 807 amp
  97. Raytheon / Western Electric JW-5755 / 420A
  98. Calculate unknown operating point from known cathode resistor
  99. 5763 triode curves
  100. HICKOK 539a QUESTION
  101. Constant current heaters
  102. max G2 voltage 1624 tube (Tabor)
  103. Need reference for Dynaco MKIV amp build
  104. Biasing Valve on Bipolar Power Supply
  105. Tubelab sse choke input 6v6
  106. $1800 tube amp
  107. Testing a 6N3 5670 etc on a B&K 600 tester
  108. Could anyone shed any light on this amp for me?
  109. Translation Russian EL84SE design please?
  110. Determining plate and screen voltage
  111. I Don't want to set the forum on fire . . .
  112. Valab Ultra Low Noise Regulatible
  113. Westinghouse 6973 Tube
  114. Which is worth burning or keeping
  115. OPT position
  116. Remove volume pot
  117. Headphone amp ideas?
  118. Good Looking 6SN7
  119. UTC Transformer
  120. Cap substitution help
  121. Edcor replacement for w5m peerless opt
  122. Audyn True copper caps.
  123. No Feedback Balanced Line Design
  124. KT120 PP - "low power" baptized Vitruvian amplifier
  125. Senior Design Project
  126. Hovland Sapphire guidance needed
  127. Question about specialized OPT
  128. My first build tubelab SE
  129. k16ls tube amp on/off switch?
  130. SY Tube Phono Improvements?
  131. Tube newbie, anyone familar with s-5 k-502? Help needed please
  132. TVA-1 Michaelson & Austin with problems
  133. New to HIFI tube need advice
  134. Crosstalk between Triodes in Dual Triode Tubes
  135. 6L6GC instead of EL34
  136. Schade feedback and CFB
  137. Sansui AU-70 - Help Needed
  138. Pentode C.F, where to connect the suppressor grid ?
  139. Separate PSU for PP EL34 / 6SN7GT integrated amp
  140. Simple SE driver with mosfet (6sn7/307A) IRF820
  141. Is it safe to run pentode w/ no screen voltage for a min?
  142. Low B+ and CCS question
  143. Has anyone ever used slate in audio?
  144. Semi-Fixed Bias?
  145. Transformers MIC and Phono
  146. Russian capacitor markings
  147. 6L6GC...More Voltage...or More Current?
  148. help me
  149. Anybody built/heard Melquiades amp
  150. Elevated grid bias
  151. Oscillation found in Luxman LX33
  152. RCA phono amp project
  153. Test of 45 Triode with EICO 625?
  154. Standard Silicon Diode Rectifier's VS Ultra Fast
  155. Output Transformer for L3 pre Audio Note
  156. "Boosted" Triode operation?
  157. 6HB6 UL push pull amp
  158. Interstage transformer ratio, spacecharge tubes in PP
  159. 6N6P line stage
  160. Revamping Tube Amp Monoblock - capacitor grounding concern
  161. 845 set bias.
  162. How to improve on a working Hybrid Amp: 832A Tube with MOSFETs
  163. tube outputs
  164. Coupling Cap Consistency
  165. Volume adjustment on 8ch at once
  166. Sub minature tube gain stage question.
  167. DHT PSE 2A3
  168. Plate voltage mic pre
  169. Estimating load for Duncan Amps PSU tool HOWTO?
  170. Shuguang Treasure Series 300B-Z not satisfactory!
  171. Choosing OP of small signal tubes with CCS in the cathode
  172. Aikido help needed
  173. Exploding 300B
  174. power output of EL34
  175. 76 tube into C3M (triode) via LL1660 to PP output stage
  176. best operating points for e182cc tube
  177. Any thoughts about this volume/bal arrangement
  178. Filament tension spring material
  179. DC coupled SE Schade amp
  180. First build 6V6 based
  181. Failed Converting UL to Pentode!?
  182. 1955 kids record player hum puzzle
  183. subwoofer output from my tube preamp
  184. EL84 SE Amp - specific transformer
  185. "GOOD" backup KT-88
  186. New or Old Output Transformer?
  187. Motorola console recap question
  188. Plate voltage on preamp tube too high
  189. Good valve design calculator website
  190. Ultra-on push-pull tetrode 6550
  191. My introduction to tube amps. The good, the bad, and the ugly.
  192. How do I calculate local feedback %?
  193. Newbie greeting & Resource
  194. Tips/Help With a Dying OTL Headphone Amp
  195. 6B4G and ECC83
  196. Maron buys a tube amp
  197. Newbie
  198. 845 AC filaments, my experience
  199. 8552 finals ?
  200. Low voltage 3W S.E. little amp, need comments and suggestions
  201. Single ended push pull ultra linear or?...
  202. Hello and questions about Magnavox SE amp
  203. Amp identification
  204. Millett DCPP No Output.
  205. using a Hammond 835 interstage ?
  206. Recommendation on versitile tube tester
  207. Mullard 6SN7GT
  208. RIAA tube pre amp
  209. Cheapo Ebay voltmeter
  210. Jolida SJ202a Schematic
  211. Tetra All in One Phono Preamp voltage
  212. Console pull advice
  213. Local feedback on IT secondary (PP amp)
  214. Computerized Curve Tracer Project
  215. Is 6w enough and can i use phone power amp?
  216. Yaqin MS-12B preamp - how to get more gain?
  217. Inductor Multiplier Patent
  218. KT90
  219. 6L6GC Hybrid Partial Feedback
  220. 7868 to 7591a conversion help
  221. SOS! 21st Century Regulator Dead!
  222. Transformer Placement - To shield or not to Shield
  223. cap multiplier suggestions wanted
  224. Bridging stereo tube amp to one more powerful mono output
  225. Weird pentode connections
  226. My last S.E. amplifier (pentode driver + Beam Power Tube Ultralinear mode)
  227. Please help info UTC transformer
  228. ARC SP-6B Tube Heaters Glow Very Bright at Startup
  229. SUPER budget DIY tube amp - need help
  230. LEAK TL/12
  231. What decides gain of a valve stage ?
  232. 6AH4 Preamp..A great option for line stage
  233. Kondo M77
  234. 2C22 SRPP
  235. Resistor question
  236. Problem with X10-d as preamp
  237. Pilot One AA-410 1950s
  238. Measuring VAC on coupling cap
  239. Tube phono stage load
  240. ANUBIS - Another Tube-Transistor Hybrid Amplifier
  241. Panasonic HV Electrolitics
  242. Unison Research Smart 845 & dripping sticky goo!
  243. Seeking Danish help to locate two 1950's magazine articles
  244. Valve cruelty ...
  245. Re- calculating RIAA network
  246. Just another cool toy to look at
  247. sherwood s-5000 vs. s-5500 iv OPt's
  248. Sound of 300B SET by Satoru Kobayashi
  249. Using UL taps instead of the anode taps to alter inpedence
  250. Help fast please! Type 3 Ei KT90's - Pre or Post War? How do you know?

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