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

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