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  1. Feedback RH84 6v6
  2. copper wire from socket bolts to exhaust tip?
  3. What KT88 brands can handle high B+ triode connected?
  4. Williamson-style circuit with Schade feedback using pentode driver stage?
  5. potentiometer for blackface deluxe reverb
  6. GM70 tube copper vs graphite plate???
  7. +/-floating tube PSU for guitar ?! Schematic error ?
  8. About Dark Heater Tubes.
  9. Sylvania 5692 Black base tubes
  10. Tube Tester in Montreal
  11. tubelab.com's super tube SE
  12. Unsual use of triode?
  13. What the hell is Class A3 ?
  14. High voltage triodes (true triodes)
  15. Ceramic Filter Selection
  16. Eagle library for CMC teflon 9-pin tube socket?
  17. Power supply mosfet vs choke filter
  18. Capacitors used in Conrad Johnson PV7
  19. HH Scott 299A center out to subwoofer
  20. PP Amplifier Advice Sought: EL34/KT88 UL/Triode
  21. Search for StepUp 12V->142V @ 6mA
  22. Magnavox 8802 upgrade suggestions?
  23. filament supply using two bridges
  24. 6N2P-EV gain factor ??
  25. Talking tube replacements
  26. Audi Institute VR70E amp
  27. Share Fixed Bias using Diodes
  28. Finished my Tube DI/Preamp
  29. Arcturus Blue Tubes
  30. share your experience on sound of hybrid amps
  31. ideas for a simple ECL82/86 p-p amp?
  32. Tube replacements or substitution
  33. 12ax7 / 12au7
  34. Triode Loadline Calculator
  35. Troubleshooting a Fender Champion 600
  36. High Voltage Derived Bias Supply
  37. Universal hybrid triode-mosfet input/drive stage
  38. IT coupled 1624 or 807 amp
  39. Raytheon / Western Electric JW-5755 / 420A
  40. Calculate unknown operating point from known cathode resistor
  41. 5763 triode curves
  42. HICKOK 539a QUESTION
  43. Constant current heaters
  44. max G2 voltage 1624 tube (Tabor)
  45. Need reference for Dynaco MKIV amp build
  46. Biasing Valve on Bipolar Power Supply
  47. Tubelab sse choke input 6v6
  48. $1800 tube amp
  49. Testing a 6N3 5670 etc on a B&K 600 tester
  50. Could anyone shed any light on this amp for me?
  51. Translation Russian EL84SE design please?
  52. Determining plate and screen voltage
  53. I Don't want to set the forum on fire . . .
  54. Valab Ultra Low Noise Regulatible
  55. Westinghouse 6973 Tube
  56. Which is worth burning or keeping
  57. OPT position
  58. Remove volume pot
  59. Headphone amp ideas?
  60. Good Looking 6SN7
  61. UTC Transformer
  62. Cap substitution help
  63. Edcor replacement for w5m peerless opt
  64. Audyn True copper caps.
  65. No Feedback Balanced Line Design
  66. KT120 PP - "low power" baptized Vitruvian amplifier
  67. Senior Design Project
  68. Hovland Sapphire guidance needed
  69. Question about specialized OPT
  70. My first build tubelab SE
  71. k16ls tube amp on/off switch?
  72. SY Tube Phono Improvements?
  73. Tube newbie, anyone familar with s-5 k-502? Help needed please
  74. TVA-1 Michaelson & Austin with problems
  75. New to HIFI tube need advice
  76. Crosstalk between Triodes in Dual Triode Tubes
  77. 6L6GC instead of EL34
  78. Schade feedback and CFB
  79. Sansui AU-70 - Help Needed
  80. Pentode C.F, where to connect the suppressor grid ?
  81. Separate PSU for PP EL34 / 6SN7GT integrated amp
  82. Simple SE driver with mosfet (6sn7/307A) IRF820
  83. Is it safe to run pentode w/ no screen voltage for a min?
  84. Low B+ and CCS question
  85. Has anyone ever used slate in audio?
  86. Semi-Fixed Bias?
  87. Transformers MIC and Phono
  88. Russian capacitor markings
  89. 6L6GC...More Voltage...or More Current?
  90. help me
  91. Anybody built/heard Melquiades amp
  92. Elevated grid bias
  93. Oscillation found in Luxman LX33
  94. RCA phono amp project
  95. Test of 45 Triode with EICO 625?
  96. Standard Silicon Diode Rectifier's VS Ultra Fast
  97. Output Transformer for L3 pre Audio Note
  98. "Boosted" Triode operation?
  99. 6HB6 UL push pull amp
  100. Interstage transformer ratio, spacecharge tubes in PP
  101. 6N6P line stage
  102. Revamping Tube Amp Monoblock - capacitor grounding concern
  103. 845 set bias.
  104. How to improve on a working Hybrid Amp: 832A Tube with MOSFETs
  105. tube outputs
  106. Coupling Cap Consistency
  107. Volume adjustment on 8ch at once
  108. Sub minature tube gain stage question.
  109. DHT PSE 2A3
  110. Plate voltage mic pre
  111. Estimating load for Duncan Amps PSU tool HOWTO?
  112. Shuguang Treasure Series 300B-Z not satisfactory!
  113. Choosing OP of small signal tubes with CCS in the cathode
  114. Aikido help needed
  115. Exploding 300B
  116. power output of EL34
  117. 76tube into C3M (triode) via LL1660 to PP outputstage
  118. best operating points for e182cc tube
  119. Any thoughts about this volume/bal arrangement
  120. Filament tension spring material
  121. DC coupled SE SChade amp
  122. First build 6V6 based
  123. Failed Converting UL to Pentode!?
  124. 1955 kids record player hum puzzle
  125. subwoofer output from my tube preamp
  126. EL84 SE Amp - specific transformer
  127. "GOOD" backup KT-88
  128. New or Old Output Transformer?
  129. Motorola console recap question
  130. Plate voltage on preamp tube too high
  131. Good valve design calculator website
  132. Ultra-on push-pull tetrode 6550
  133. My introduction to tube amps. The good, the bad, and the ugly.
  134. How do I calculate local feedback %?
  135. Newbie greeting & Resource
  136. Tips/Help With a Dying OTL Headphone Amp
  137. 6B4G and ECC83
  138. Maron buys a tube amp
  139. Newbie
  140. 845 AC filaments, my experience
  141. 8552 finals ?
  142. Low voltage 3W S.E. little amp, need comments and suggestions
  143. Single ended push pull ultra linear or?...
  144. Hello and questions about Magnavox SE amp
  145. Amp identification
  146. Millett DCPP No Output.
  147. using a Hammond 835 interstage ?
  148. Recommendation on versitile tube tester
  149. Mullard 6SN7GT
  150. RIAA tube pre amp
  151. Cheapo Ebay voltmeter
  152. Jolida SJ202a Schematic
  153. Tetra All in One Phono Preamp voltage
  154. Console pull advice
  155. Local feedback on IT secundary (PP amp)
  156. Computerized Curve Tracer Project
  157. Is 6w enough and can i use phone power amp?
  158. Yaqin MS-12B preamp - how to get more gain?
  159. Inductor Multiplier Patent
  160. KT90
  161. 6L6GC Hybrid Partial Feedback
  162. 7868 to 7591a conversion help
  163. SOS! 21st Century Regulator Dead!
  164. Transformer Placement - To shield or not to Shield
  165. cap multiplier suggestions wanted
  166. Bridging stereo tube amp to one more powerful mono output
  167. Weird pentode connections
  168. My last S.E. amplifier (pentode driver + Beam Power Tube Ultralinear mode)
  169. Please help info UTC transformer
  170. ARC SP-6B Tube Heaters Glow Very Bright at Startup
  171. SUPER budget DIY tube amp - need help
  172. LEAK TL/12
  173. What decides gain of a valve stage ?
  174. 6AH4 Preamp..A great option for line stage
  175. Kondo M77
  176. 2C22 SRPP
  177. Resistor question
  178. Problem with X10-d as preamp
  179. Pilot One AA-410 1950s
  180. Measuring VAC on coupling cap
  181. Tube phono stage load
  182. ANUBIS - Another Tube-Transistor Hybrid Amplifier
  183. Panasonic HV Electrolitics
  184. Unison Research Smart 845 & dripping sticky goo!
  185. Seeking Danish help to locate two 1950's magazine articles
  186. Valve cruelty ...
  187. Re- calculating RIAA network
  188. Just another cool toy to look at
  189. sherwood s-5000 vs. s-5500 iv OPt's
  190. Sound of 300B SET by Satoru Kobayashi
  191. Using UL taps instead of the anode taps to alter inpedence
  192. Help fast please! Type 3 Ei KT90's - Pre or Post War? How do you know?
  193. 807 PSE schematic design need
  194. 3 direct coupled 2A3 amps
  195. Tube preamplifier with chip power amp
  196. Anyone used IXCP10M90S ltspice model ?
  197. and the quiz identify power trans continue
  198. Valve HT power supply common-mode noise
  199. 12AX7 and 6AS5 tube amplifier
  200. Working with Eagle and single channel tube amp board.
  201. New hands-on tutorial for Tube Newbies
  202. Help me to choose tube "1 no ring" "2 has ring"
  203. Chinese board 6L6 KT88 is it worth???
  204. Valve Rectifier Testing
  205. Harman Kardon TA-120 Output Transformer
  206. Single ended transformer as pushpull?
  207. Resurrecting a nOrh SE9 Integrated Amp
  208. Fisher Amps?
  209. Repurposing an old Gulbransen Organ tube amp
  210. Help, the sound is silken or blow up?
  211. Now here's an idea - The DIYF QUAD
  212. Parallel output SE amp options
  213. What tube is equivalent 5879?
  214. Filament Xfmr: can I trade volts for amps?
  215. GU50 PP possible with this iron ?
  216. Hifi tube amps - overall sound
  217. Preamp grounding questions
  218. Tube rectifiers
  219. DIY PL84 + E180F
  220. McIntosh on How It's Made
  221. Choke input LCLC supply - question on minimum current
  222. EBC3 & CBL1 Tube AMP
  223. CLASS A HYBRID POWER AMP
  224. MXL V69 Mogami Edition signal cuts in/out
  225. Ultra-linear plate characteristic curve for EL34
  226. Need help to modify circuit to suit replacement power XFMR
  227. Line preamp schematic for 5GH8A wanted.
  228. help please - modify phono corrector
  229. Help me: Brimar 5Z4G, 5Y3GT is this an equivalent to a 5Y3WGTA?
  230. A Russian glow tube regulator with specs of 75V 60mA ?
  231. Help with filament for ecc88
  232. How much power transformer is necessary?
  233. testing the 300b tube
  234. Headphone amplifier outputs, so many permutations!
  235. tube footprint in Eagle
  236. Need VTVM repairs
  237. First Timer - DIY Tube Amp
  238. Help identify OT please
  239. gEDA and tubes
  240. Triode Electronics Issues?
  241. RCA BC5B consolette manual?
  242. Help with converting EL37 amp to KT66
  243. treadmill choke
  244. Preamp OPT
  245. Probleme with Volume Pot
  246. Simple SE 6L6 2 watt Homebrew
  247. is 6J32P equivalent of EF806 ?
  248. new tubes vs old ones
  249. 6p36s tube torture.
  250. Questions re: Bypass of B+ to differential amp

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