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  1. Cheap and upgradable preamp
  2. Source for least expensive tubes.
  3. 5 Pin Tube Socket Suggestions Please
  4. UXCV-11 plates?
  5. Top 5 Most Popular Tube Base
  6. 6C33C and Computer PSU
  7. Output transformer impedance for a 4P1L PSE
  8. Specs of old output transformer
  9. altec 1570b
  10. Mixed tube and ss stages grounding. Best practice?
  11. Any news from Tribute?
  12. What are this....a tube or lamp or etc?
  13. duff tube? Little Bear P1
  14. Opinion on amp build
  15. K12G For Mom & Dad
  16. RIAA Network Position
  17. 6k5GT - Good Tube Curves?
  18. 5902 pentode datasheet confusion
  19. Hum in one channel on Headphone Amp
  20. KT24 datasheet, help !!!
  21. Chicago Standard Transformer Company OPT's
  22. Help on repairing messed up AMC CVT3030
  23. Anyone traced triode curves for the 6CZ5?
  24. anthem pre-1
  25. split supply for tubes
  26. Rufus p. Turner AC-DC amp
  27. 1937 Philco Radio Amp - Build Thread
  28. Transformers for valve headphone amps
  29. Help with negative feedback
  30. Silicon Diode Measurement Confusion
  31. grommet against vibrations
  32. Help with a Moscode 300
  33. Help Identifying Valve Amplifier
  34. capacitors
  35. Questions about console parts salvaging
  36. Regarding EDCOR Transformer Data
  37. PYE mozart
  38. Tube swapping with my Condensor Mic
  39. found amp - identity unknown
  40. how to low the gain
  41. VTL TL-2 tube preamp
  42. Need Advice for Bi-amping
  43. Baldwin organ amp
  44. Octal Aikido with gain/buffer switch?
  45. Harman Kardon Stereo Tube Amp Oscillator Help!
  46. Electro-Harmonex 6973 Question
  47. Power and plate current in a SE amp
  48. 6883B for use as a audio output tube
  49. "Distortionless" Tube Oscillator -Cutting Edge Technology
  50. Feedback RH84 6v6
  51. copper wire from socket bolts to exhaust tip?
  52. What KT88 brands can handle high B+ triode connected?
  53. Williamson-style circuit with Schade feedback using pentode driver stage?
  54. potentiometer for blackface deluxe reverb
  55. GM70 tube copper vs graphite plate???
  56. +/-floating tube PSU for guitar ?! Schematic error ?
  57. About Dark Heater Tubes.
  58. Sylvania 5692 Black base tubes
  59. Tube Tester in Montreal
  60. tubelab.com's super tube SE
  61. Unsual use of triode?
  62. What the hell is Class A3 ?
  63. High voltage triodes (true triodes)
  64. Ceramic Filter Selection
  65. Eagle library for CMC teflon 9-pin tube socket?
  66. Power supply mosfet vs choke filter
  67. Capacitors used in Conrad Johnson PV7
  68. HH Scott 299A center out to subwoofer
  69. PP Amplifier Advice Sought: EL34/KT88 UL/Triode
  70. Search for StepUp 12V->142V @ 6mA
  71. Magnavox 8802 upgrade suggestions?
  72. filament supply using two bridges
  73. 6N2P-EV gain factor ??
  74. Talking tube replacements
  75. Audi Institute VR70E amp
  76. Share Fixed Bias using Diodes
  77. Finished my Tube DI/Preamp
  78. Arcturus Blue Tubes
  79. share your experience on sound of hybrid amps
  80. ideas for a simple ECL82/86 p-p amp?
  81. Tube replacements or substitution
  82. 12ax7 / 12au7
  83. Triode/Pentode Loadline Calculator
  84. Troubleshooting a Fender Champion 600
  85. High Voltage Derived Bias Supply
  86. Universal hybrid triode-mosfet input/drive stage
  87. IT coupled 1624 or 807 amp
  88. Raytheon / Western Electric JW-5755 / 420A
  89. Calculate unknown operating point from known cathode resistor
  90. 5763 triode curves
  91. HICKOK 539a QUESTION
  92. Constant current heaters
  93. max G2 voltage 1624 tube (Tabor)
  94. Need reference for Dynaco MKIV amp build
  95. Biasing Valve on Bipolar Power Supply
  96. Tubelab sse choke input 6v6
  97. $1800 tube amp
  98. Testing a 6N3 5670 etc on a B&K 600 tester
  99. Could anyone shed any light on this amp for me?
  100. Translation Russian EL84SE design please?
  101. Determining plate and screen voltage
  102. I Don't want to set the forum on fire . . .
  103. Valab Ultra Low Noise Regulatible
  104. Westinghouse 6973 Tube
  105. Which is worth burning or keeping
  106. OPT position
  107. Remove volume pot
  108. Headphone amp ideas?
  109. Good Looking 6SN7
  110. UTC Transformer
  111. Cap substitution help
  112. Edcor replacement for w5m peerless opt
  113. Audyn True copper caps.
  114. No Feedback Balanced Line Design
  115. KT120 PP - "low power" baptized Vitruvian amplifier
  116. Senior Design Project
  117. Hovland Sapphire guidance needed
  118. Question about specialized OPT
  119. My first build tubelab SE
  120. k16ls tube amp on/off switch?
  121. SY Tube Phono Improvements?
  122. Tube newbie, anyone familar with s-5 k-502? Help needed please
  123. TVA-1 Michaelson & Austin with problems
  124. New to HIFI tube need advice
  125. Crosstalk between Triodes in Dual Triode Tubes
  126. 6L6GC instead of EL34
  127. Schade feedback and CFB
  128. Sansui AU-70 - Help Needed
  129. Pentode C.F, where to connect the suppressor grid ?
  130. Separate PSU for PP EL34 / 6SN7GT integrated amp
  131. Simple SE driver with mosfet (6sn7/307A) IRF820
  132. Is it safe to run pentode w/ no screen voltage for a min?
  133. Low B+ and CCS question
  134. Has anyone ever used slate in audio?
  135. Semi-Fixed Bias?
  136. Transformers MIC and Phono
  137. Russian capacitor markings
  138. 6L6GC...More Voltage...or More Current?
  139. help me
  140. Anybody built/heard Melquiades amp
  141. Elevated grid bias
  142. Oscillation found in Luxman LX33
  143. RCA phono amp project
  144. Test of 45 Triode with EICO 625?
  145. Standard Silicon Diode Rectifier's VS Ultra Fast
  146. Output Transformer for L3 pre Audio Note
  147. "Boosted" Triode operation?
  148. 6HB6 UL push pull amp
  149. Interstage transformer ratio, spacecharge tubes in PP
  150. 6N6P line stage
  151. Revamping Tube Amp Monoblock - capacitor grounding concern
  152. 845 set bias.
  153. How to improve on a working Hybrid Amp: 832A Tube with MOSFETs
  154. tube outputs
  155. Coupling Cap Consistency
  156. Volume adjustment on 8ch at once
  157. Sub minature tube gain stage question.
  158. DHT PSE 2A3
  159. Plate voltage mic pre
  160. Estimating load for Duncan Amps PSU tool HOWTO?
  161. Shuguang Treasure Series 300B-Z not satisfactory!
  162. Choosing OP of small signal tubes with CCS in the cathode
  163. Aikido help needed
  164. Exploding 300B
  165. power output of EL34
  166. 76tube into C3M (triode) via LL1660 to PP outputstage
  167. best operating points for e182cc tube
  168. Any thoughts about this volume/bal arrangement
  169. Filament tension spring material
  170. DC coupled SE SChade amp
  171. First build 6V6 based
  172. Failed Converting UL to Pentode!?
  173. 1955 kids record player hum puzzle
  174. subwoofer output from my tube preamp
  175. EL84 SE Amp - specific transformer
  176. "GOOD" backup KT-88
  177. New or Old Output Transformer?
  178. Motorola console recap question
  179. Plate voltage on preamp tube too high
  180. Good valve design calculator website
  181. Ultra-on push-pull tetrode 6550
  182. My introduction to tube amps. The good, the bad, and the ugly.
  183. How do I calculate local feedback %?
  184. Newbie greeting & Resource
  185. Tips/Help With a Dying OTL Headphone Amp
  186. 6B4G and ECC83
  187. Maron buys a tube amp
  188. Newbie
  189. 845 AC filaments, my experience
  190. 8552 finals ?
  191. Low voltage 3W S.E. little amp, need comments and suggestions
  192. Single ended push pull ultra linear or?...
  193. Hello and questions about Magnavox SE amp
  194. Amp identification
  195. Millett DCPP No Output.
  196. using a Hammond 835 interstage ?
  197. Recommendation on versitile tube tester
  198. Mullard 6SN7GT
  199. RIAA tube pre amp
  200. Cheapo Ebay voltmeter
  201. Jolida SJ202a Schematic
  202. Tetra All in One Phono Preamp voltage
  203. Console pull advice
  204. Local feedback on IT secundary (PP amp)
  205. Computerized Curve Tracer Project
  206. Is 6w enough and can i use phone power amp?
  207. Yaqin MS-12B preamp - how to get more gain?
  208. Inductor Multiplier Patent
  209. KT90
  210. 6L6GC Hybrid Partial Feedback
  211. 7868 to 7591a conversion help
  212. SOS! 21st Century Regulator Dead!
  213. Transformer Placement - To shield or not to Shield
  214. cap multiplier suggestions wanted
  215. Bridging stereo tube amp to one more powerful mono output
  216. Weird pentode connections
  217. My last S.E. amplifier (pentode driver + Beam Power Tube Ultralinear mode)
  218. Please help info UTC transformer
  219. ARC SP-6B Tube Heaters Glow Very Bright at Startup
  220. SUPER budget DIY tube amp - need help
  221. LEAK TL/12
  222. What decides gain of a valve stage ?
  223. 6AH4 Preamp..A great option for line stage
  224. Kondo M77
  225. 2C22 SRPP
  226. Resistor question
  227. Problem with X10-d as preamp
  228. Pilot One AA-410 1950s
  229. Measuring VAC on coupling cap
  230. Tube phono stage load
  231. ANUBIS - Another Tube-Transistor Hybrid Amplifier
  232. Panasonic HV Electrolitics
  233. Unison Research Smart 845 & dripping sticky goo!
  234. Seeking Danish help to locate two 1950's magazine articles
  235. Valve cruelty ...
  236. Re- calculating RIAA network
  237. Just another cool toy to look at
  238. sherwood s-5000 vs. s-5500 iv OPt's
  239. Sound of 300B SET by Satoru Kobayashi
  240. Using UL taps instead of the anode taps to alter inpedence
  241. Help fast please! Type 3 Ei KT90's - Pre or Post War? How do you know?
  242. 807 PSE schematic design need
  243. 3 direct coupled 2A3 amps
  244. Tube preamplifier with chip power amp
  245. Anyone used IXCP10M90S ltspice model ?
  246. and the quiz identify power trans continue
  247. Valve HT power supply common-mode noise
  248. 12AX7 and 6AS5 tube amplifier
  249. Working with Eagle and single channel tube amp board.
  250. New hands-on tutorial for Tube Newbies

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