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  1. Pair of Ampex 620 amps
  2. My SE 6S4S
  3. chinese ebay 12au7 + 6dj8 white cathode follower preamp boards?
  4. "chirp" when power up amplifier
  5. Modified Dynaco PAS Phono
  6. Filter Chokes wired for CMR
  7. Capacitors / K12G Tube Amp
  8. Sansui SM-30
  9. RCA Phono Preamplifier with 12ax7
  10. separate filament transformer for 5u4g?
  11. EL34 Triode strapped amplifier
  12. Testing emission without risk
  13. Anyone Build the Borbely 15W 6C33C SE?
  14. Cheap and upgradable preamp
  15. Source for least expensive tubes.
  16. 5 Pin Tube Socket Suggestions Please
  17. UXCV-11 plates?
  18. Top 5 Most Popular Tube Base
  19. 6C33C and Computer PSU
  20. Output transformer impedance for a 4P1L PSE
  21. Specs of old output transformer
  22. altec 1570b
  23. Mixed tube and ss stages grounding. Best practice?
  24. Any news from Tribute?
  25. What are this....a tube or lamp or etc?
  26. duff tube? Little Bear P1
  27. Opinion on amp build
  28. K12G For Mom & Dad
  29. RIAA Network Position
  30. 6k5GT - Good Tube Curves?
  31. 5902 pentode datasheet confusion
  32. Hum in one channel on Headphone Amp
  33. KT24 datasheet, help !!!
  34. Chicago Standard Transformer Company OPT's
  35. Help on repairing messed up AMC CVT3030
  36. Anyone traced triode curves for the 6CZ5?
  37. anthem pre-1
  38. split supply for tubes
  39. Rufus p. Turner AC-DC amp
  40. 1937 Philco Radio Amp - Build Thread
  41. Transformers for valve headphone amps
  42. Help with negative feedback
  43. Silicon Diode Measurement Confusion
  44. grommet against vibrations
  45. Help with a Moscode 300
  46. Help Identifying Valve Amplifier
  47. capacitors
  48. Questions about console parts salvaging
  49. Regarding EDCOR Transformer Data
  50. PYE mozart
  51. Tube swapping with my Condensor Mic
  52. found amp - identity unknown
  53. how to low the gain
  54. VTL TL-2 tube preamp
  55. Need Advice for Bi-amping
  56. Baldwin organ amp
  57. Octal Aikido with gain/buffer switch?
  58. Harman Kardon Stereo Tube Amp Oscillator Help!
  59. Electro-Harmonex 6973 Question
  60. Power and plate current in a SE amp
  61. 6883B for use as a audio output tube
  62. "Distortionless" Tube Oscillator -Cutting Edge Technology
  63. Feedback RH84 6v6
  64. copper wire from socket bolts to exhaust tip?
  65. What KT88 brands can handle high B+ triode connected?
  66. Williamson-style circuit with Schade feedback using pentode driver stage?
  67. potentiometer for blackface deluxe reverb
  68. GM70 tube copper vs graphite plate???
  69. +/-floating tube PSU for guitar ?! Schematic error ?
  70. About Dark Heater Tubes.
  71. Sylvania 5692 Black base tubes
  72. Tube Tester in Montreal
  73. tubelab.com's super tube SE
  74. Unsual use of triode?
  75. What the hell is Class A3 ?
  76. High voltage triodes (true triodes)
  77. Ceramic Filter Selection
  78. Eagle library for CMC teflon 9-pin tube socket?
  79. Power supply mosfet vs choke filter
  80. Capacitors used in Conrad Johnson PV7
  81. HH Scott 299A center out to subwoofer
  82. PP Amplifier Advice Sought: EL34/KT88 UL/Triode
  83. Search for StepUp 12V->142V @ 6mA
  84. Magnavox 8802 upgrade suggestions?
  85. filament supply using two bridges
  86. 6N2P-EV gain factor ??
  87. Talking tube replacements
  88. Audi Institute VR70E amp
  89. Share Fixed Bias using Diodes
  90. Finished my Tube DI/Preamp
  91. Arcturus Blue Tubes
  92. share your experience on sound of hybrid amps
  93. ideas for a simple ECL82/86 p-p amp?
  94. Tube replacements or substitution
  95. 12ax7 / 12au7
  96. Triode/Pentode Loadline Calculator
  97. Troubleshooting a Fender Champion 600
  98. High Voltage Derived Bias Supply
  99. Universal hybrid triode-mosfet input/drive stage
  100. IT coupled 1624 or 807 amp
  101. Raytheon / Western Electric JW-5755 / 420A
  102. Calculate unknown operating point from known cathode resistor
  103. 5763 triode curves
  104. HICKOK 539a QUESTION
  105. Constant current heaters
  106. max G2 voltage 1624 tube (Tabor)
  107. Need reference for Dynaco MKIV amp build
  108. Biasing Valve on Bipolar Power Supply
  109. Tubelab sse choke input 6v6
  110. $1800 tube amp
  111. Testing a 6N3 5670 etc on a B&K 600 tester
  112. Could anyone shed any light on this amp for me?
  113. Translation Russian EL84SE design please?
  114. Determining plate and screen voltage
  115. I Don't want to set the forum on fire . . .
  116. Valab Ultra Low Noise Regulatible
  117. Westinghouse 6973 Tube
  118. Which is worth burning or keeping
  119. OPT position
  120. Remove volume pot
  121. Headphone amp ideas?
  122. Good Looking 6SN7
  123. UTC Transformer
  124. Cap substitution help
  125. Edcor replacement for w5m peerless opt
  126. Audyn True copper caps.
  127. No Feedback Balanced Line Design
  128. KT120 PP - "low power" baptized Vitruvian amplifier
  129. Senior Design Project
  130. Hovland Sapphire guidance needed
  131. Question about specialized OPT
  132. My first build tubelab SE
  133. k16ls tube amp on/off switch?
  134. SY Tube Phono Improvements?
  135. Tube newbie, anyone familar with s-5 k-502? Help needed please
  136. TVA-1 Michaelson & Austin with problems
  137. New to HIFI tube need advice
  138. Crosstalk between Triodes in Dual Triode Tubes
  139. 6L6GC instead of EL34
  140. Schade feedback and CFB
  141. Sansui AU-70 - Help Needed
  142. Pentode C.F, where to connect the suppressor grid ?
  143. Separate PSU for PP EL34 / 6SN7GT integrated amp
  144. Simple SE driver with mosfet (6sn7/307A) IRF820
  145. Is it safe to run pentode w/ no screen voltage for a min?
  146. Low B+ and CCS question
  147. Has anyone ever used slate in audio?
  148. Semi-Fixed Bias?
  149. Transformers MIC and Phono
  150. Russian capacitor markings
  151. 6L6GC...More Voltage...or More Current?
  152. help me
  153. Anybody built/heard Melquiades amp
  154. Elevated grid bias
  155. Oscillation found in Luxman LX33
  156. RCA phono amp project
  157. Test of 45 Triode with EICO 625?
  158. Standard Silicon Diode Rectifier's VS Ultra Fast
  159. Output Transformer for L3 pre Audio Note
  160. "Boosted" Triode operation?
  161. 6HB6 UL push pull amp
  162. Interstage transformer ratio, spacecharge tubes in PP
  163. 6N6P line stage
  164. Revamping Tube Amp Monoblock - capacitor grounding concern
  165. 845 set bias.
  166. How to improve on a working Hybrid Amp: 832A Tube with MOSFETs
  167. tube outputs
  168. Coupling Cap Consistency
  169. Volume adjustment on 8ch at once
  170. Sub minature tube gain stage question.
  171. DHT PSE 2A3
  172. Plate voltage mic pre
  173. Estimating load for Duncan Amps PSU tool HOWTO?
  174. Shuguang Treasure Series 300B-Z not satisfactory!
  175. Choosing OP of small signal tubes with CCS in the cathode
  176. Aikido help needed
  177. Exploding 300B
  178. power output of EL34
  179. 76tube into C3M (triode) via LL1660 to PP outputstage
  180. best operating points for e182cc tube
  181. Any thoughts about this volume/bal arrangement
  182. Filament tension spring material
  183. DC coupled SE SChade amp
  184. First build 6V6 based
  185. Failed Converting UL to Pentode!?
  186. 1955 kids record player hum puzzle
  187. subwoofer output from my tube preamp
  188. EL84 SE Amp - specific transformer
  189. "GOOD" backup KT-88
  190. New or Old Output Transformer?
  191. Motorola console recap question
  192. Plate voltage on preamp tube too high
  193. Good valve design calculator website
  194. Ultra-on push-pull tetrode 6550
  195. My introduction to tube amps. The good, the bad, and the ugly.
  196. How do I calculate local feedback %?
  197. Newbie greeting & Resource
  198. Tips/Help With a Dying OTL Headphone Amp
  199. 6B4G and ECC83
  200. Maron buys a tube amp
  201. Newbie
  202. 845 AC filaments, my experience
  203. 8552 finals ?
  204. Low voltage 3W S.E. little amp, need comments and suggestions
  205. Single ended push pull ultra linear or?...
  206. Hello and questions about Magnavox SE amp
  207. Amp identification
  208. Millett DCPP No Output.
  209. using a Hammond 835 interstage ?
  210. Recommendation on versitile tube tester
  211. Mullard 6SN7GT
  212. RIAA tube pre amp
  213. Cheapo Ebay voltmeter
  214. Jolida SJ202a Schematic
  215. Tetra All in One Phono Preamp voltage
  216. Console pull advice
  217. Local feedback on IT secundary (PP amp)
  218. Computerized Curve Tracer Project
  219. Is 6w enough and can i use phone power amp?
  220. Yaqin MS-12B preamp - how to get more gain?
  221. Inductor Multiplier Patent
  222. KT90
  223. 6L6GC Hybrid Partial Feedback
  224. 7868 to 7591a conversion help
  225. SOS! 21st Century Regulator Dead!
  226. Transformer Placement - To shield or not to Shield
  227. cap multiplier suggestions wanted
  228. Bridging stereo tube amp to one more powerful mono output
  229. Weird pentode connections
  230. My last S.E. amplifier (pentode driver + Beam Power Tube Ultralinear mode)
  231. Please help info UTC transformer
  232. ARC SP-6B Tube Heaters Glow Very Bright at Startup
  233. SUPER budget DIY tube amp - need help
  234. LEAK TL/12
  235. What decides gain of a valve stage ?
  236. 6AH4 Preamp..A great option for line stage
  237. Kondo M77
  238. 2C22 SRPP
  239. Resistor question
  240. Problem with X10-d as preamp
  241. Pilot One AA-410 1950s
  242. Measuring VAC on coupling cap
  243. Tube phono stage load
  244. ANUBIS - Another Tube-Transistor Hybrid Amplifier
  245. Panasonic HV Electrolitics
  246. Unison Research Smart 845 & dripping sticky goo!
  247. Seeking Danish help to locate two 1950's magazine articles
  248. Valve cruelty ...
  249. Re- calculating RIAA network
  250. Just another cool toy to look at

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