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  1. Eagle library for CMC teflon 9-pin tube socket?
  2. Power supply mosfet vs choke filter
  3. Capacitors used in Conrad Johnson PV7
  4. HH Scott 299A center out to subwoofer
  5. PP Amplifier Advice Sought: EL34/KT88 UL/Triode
  6. Search for StepUp 12V->142V @ 6mA
  7. Magnavox 8802 upgrade suggestions?
  8. filament supply using two bridges
  9. 6N2P-EV gain factor ??
  10. Talking tube replacements
  11. Audi Institute VR70E amp
  12. Share Fixed Bias using Diodes
  13. Finished my Tube DI/Preamp
  14. Arcturus Blue Tubes
  15. share your experience on sound of hybrid amps
  16. ideas for a simple ECL82/86 p-p amp?
  17. Tube replacements or substitution
  18. 12ax7 / 12au7
  19. Triode/Pentode Loadline Calculator
  20. Troubleshooting a Fender Champion 600
  21. High Voltage Derived Bias Supply
  22. Universal hybrid triode-mosfet input/drive stage
  23. IT coupled 1624 or 807 amp
  24. Raytheon / Western Electric JW-5755 / 420A
  25. Calculate unknown operating point from known cathode resistor
  26. 5763 triode curves
  27. HICKOK 539a QUESTION
  28. Constant current heaters
  29. max G2 voltage 1624 tube (Tabor)
  30. Need reference for Dynaco MKIV amp build
  31. Biasing Valve on Bipolar Power Supply
  32. Tubelab sse choke input 6v6
  33. $1800 tube amp
  34. Testing a 6N3 5670 etc on a B&K 600 tester
  35. Could anyone shed any light on this amp for me?
  36. Translation Russian EL84SE design please?
  37. Determining plate and screen voltage
  38. I Don't want to set the forum on fire . . .
  39. Valab Ultra Low Noise Regulatible
  40. Westinghouse 6973 Tube
  41. Which is worth burning or keeping
  42. OPT position
  43. Remove volume pot
  44. Headphone amp ideas?
  45. Good Looking 6SN7
  46. UTC Transformer
  47. Cap substitution help
  48. Edcor replacement for w5m peerless opt
  49. Audyn True copper caps.
  50. No Feedback Balanced Line Design
  51. KT120 PP - "low power" baptized Vitruvian amplifier
  52. Senior Design Project
  53. Hovland Sapphire guidance needed
  54. Question about specialized OPT
  55. My first build tubelab SE
  56. k16ls tube amp on/off switch?
  57. SY Tube Phono Improvements?
  58. Tube newbie, anyone familar with s-5 k-502? Help needed please
  59. TVA-1 Michaelson & Austin with problems
  60. New to HIFI tube need advice
  61. Crosstalk between Triodes in Dual Triode Tubes
  62. 6L6GC instead of EL34
  63. Schade feedback and CFB
  64. Sansui AU-70 - Help Needed
  65. Pentode C.F, where to connect the suppressor grid ?
  66. Separate PSU for PP EL34 / 6SN7GT integrated amp
  67. Simple SE driver with mosfet (6sn7/307A) IRF820
  68. Is it safe to run pentode w/ no screen voltage for a min?
  69. Low B+ and CCS question
  70. Has anyone ever used slate in audio?
  71. Semi-Fixed Bias?
  72. Transformers MIC and Phono
  73. Russian capacitor markings
  74. 6L6GC...More Voltage...or More Current?
  75. help me
  76. Anybody built/heard Melquiades amp
  77. Elevated grid bias
  78. Oscillation found in Luxman LX33
  79. RCA phono amp project
  80. Test of 45 Triode with EICO 625?
  81. Standard Silicon Diode Rectifier's VS Ultra Fast
  82. Output Transformer for L3 pre Audio Note
  83. "Boosted" Triode operation?
  84. 6HB6 UL push pull amp
  85. Interstage transformer ratio, spacecharge tubes in PP
  86. 6N6P line stage
  87. Revamping Tube Amp Monoblock - capacitor grounding concern
  88. 845 set bias.
  89. How to improve on a working Hybrid Amp: 832A Tube with MOSFETs
  90. tube outputs
  91. Coupling Cap Consistency
  92. Volume adjustment on 8ch at once
  93. Sub minature tube gain stage question.
  94. DHT PSE 2A3
  95. Plate voltage mic pre
  96. Estimating load for Duncan Amps PSU tool HOWTO?
  97. Shuguang Treasure Series 300B-Z not satisfactory!
  98. Choosing OP of small signal tubes with CCS in the cathode
  99. Aikido help needed
  100. Exploding 300B
  101. power output of EL34
  102. 76tube into C3M (triode) via LL1660 to PP outputstage
  103. best operating points for e182cc tube
  104. Any thoughts about this volume/bal arrangement
  105. Filament tension spring material
  106. DC coupled SE SChade amp
  107. First build 6V6 based
  108. Failed Converting UL to Pentode!?
  109. 1955 kids record player hum puzzle
  110. subwoofer output from my tube preamp
  111. EL84 SE Amp - specific transformer
  112. "GOOD" backup KT-88
  113. New or Old Output Transformer?
  114. Motorola console recap question
  115. Plate voltage on preamp tube too high
  116. Good valve design calculator website
  117. Ultra-on push-pull tetrode 6550
  118. My introduction to tube amps. The good, the bad, and the ugly.
  119. How do I calculate local feedback %?
  120. Newbie greeting & Resource
  121. Tips/Help With a Dying OTL Headphone Amp
  122. 6B4G and ECC83
  123. Maron buys a tube amp
  124. Newbie
  125. 845 AC filaments, my experience
  126. 8552 finals ?
  127. Low voltage 3W S.E. little amp, need comments and suggestions
  128. Single ended push pull ultra linear or?...
  129. Hello and questions about Magnavox SE amp
  130. Amp identification
  131. Millett DCPP No Output.
  132. using a Hammond 835 interstage ?
  133. Recommendation on versitile tube tester
  134. Mullard 6SN7GT
  135. RIAA tube pre amp
  136. Cheapo Ebay voltmeter
  137. Jolida SJ202a Schematic
  138. Tetra All in One Phono Preamp voltage
  139. Console pull advice
  140. Local feedback on IT secundary (PP amp)
  141. Computerized Curve Tracer Project
  142. Is 6w enough and can i use phone power amp?
  143. Yaqin MS-12B preamp - how to get more gain?
  144. Inductor Multiplier Patent
  145. KT90
  146. 6L6GC Hybrid Partial Feedback
  147. 7868 to 7591a conversion help
  148. SOS! 21st Century Regulator Dead!
  149. Transformer Placement - To shield or not to Shield
  150. cap multiplier suggestions wanted
  151. Bridging stereo tube amp to one more powerful mono output
  152. Weird pentode connections
  153. My last S.E. amplifier (pentode driver + Beam Power Tube Ultralinear mode)
  154. Please help info UTC transformer
  155. ARC SP-6B Tube Heaters Glow Very Bright at Startup
  156. SUPER budget DIY tube amp - need help
  157. LEAK TL/12
  158. What decides gain of a valve stage ?
  159. 6AH4 Preamp..A great option for line stage
  160. Kondo M77
  161. 2C22 SRPP
  162. Resistor question
  163. Problem with X10-d as preamp
  164. Pilot One AA-410 1950s
  165. Measuring VAC on coupling cap
  166. Tube phono stage load
  167. ANUBIS - Another Tube-Transistor Hybrid Amplifier
  168. Panasonic HV Electrolitics
  169. Unison Research Smart 845 & dripping sticky goo!
  170. Seeking Danish help to locate two 1950's magazine articles
  171. Valve cruelty ...
  172. Re- calculating RIAA network
  173. Just another cool toy to look at
  174. sherwood s-5000 vs. s-5500 iv OPt's
  175. Sound of 300B SET by Satoru Kobayashi
  176. Using UL taps instead of the anode taps to alter inpedence
  177. Help fast please! Type 3 Ei KT90's - Pre or Post War? How do you know?
  178. 807 PSE schematic design need
  179. 3 direct coupled 2A3 amps
  180. Tube preamplifier with chip power amp
  181. Anyone used IXCP10M90S ltspice model ?
  182. and the quiz identify power trans continue
  183. Valve HT power supply common-mode noise
  184. 12AX7 and 6AS5 tube amplifier
  185. Working with Eagle and single channel tube amp board.
  186. New hands-on tutorial for Tube Newbies
  187. Help me to choose tube "1 no ring" "2 has ring"
  188. Chinese board 6L6 KT88 is it worth???
  189. Valve Rectifier Testing
  190. Harman Kardon TA-120 Output Transformer
  191. Single ended transformer as pushpull?
  192. Resurrecting a nOrh SE9 Integrated Amp
  193. Fisher Amps?
  194. Repurposing an old Gulbransen Organ tube amp
  195. Help, the sound is silken or blow up?
  196. Now here's an idea - The DIYF QUAD
  197. Parallel output SE amp options
  198. What tube is equivalent 5879?
  199. Filament Xfmr: can I trade volts for amps?
  200. GU50 PP possible with this iron ?
  201. Hifi tube amps - overall sound
  202. Preamp grounding questions
  203. Tube rectifiers
  204. DIY PL84 + E180F
  205. McIntosh on How It's Made
  206. Choke input LCLC supply - question on minimum current
  207. EBC3 & CBL1 Tube AMP
  208. CLASS A HYBRID POWER AMP
  209. MXL V69 Mogami Edition signal cuts in/out
  210. Ultra-linear plate characteristic curve for EL34
  211. Need help to modify circuit to suit replacement power XFMR
  212. Line preamp schematic for 5GH8A wanted.
  213. help please - modify phono corrector
  214. Help me: Brimar 5Z4G, 5Y3GT is this an equivalent to a 5Y3WGTA?
  215. A Russian glow tube regulator with specs of 75V 60mA ?
  216. Help with filament for ecc88
  217. How much power transformer is necessary?
  218. testing the 300b tube
  219. Headphone amplifier outputs, so many permutations!
  220. tube footprint in Eagle
  221. Need VTVM repairs
  222. First Timer - DIY Tube Amp
  223. Help identify OT please
  224. gEDA and tubes
  225. Triode Electronics Issues?
  226. RCA BC5B consolette manual?
  227. Help with converting EL37 amp to KT66
  228. treadmill choke
  229. Preamp OPT
  230. Probleme with Volume Pot
  231. Simple SE 6L6 2 watt Homebrew
  232. is 6J32P equivalent of EF806 ?
  233. new tubes vs old ones
  234. 6p36s tube torture.
  235. Questions re: Bypass of B+ to differential amp
  236. Tube choice for yaqin cd3 buffer
  237. yesterday and today
  238. 260VDC need how much VAC transformer, is it 184VAC?
  239. preamp static
  240. Tube Line or Phono Stage bare kit
  241. Grounding of Hammond transformers
  242. Spud Amplifier with 6E5P Tube
  243. RAT Tube Tester build
  244. need a little help with identification
  245. aikido 12vac help needed
  246. Mullard 3-3 PCB
  247. OTL Using OPT
  248. VA/CF 6SN7 preamp input points?
  249. Copper losses in output transformers
  250. Yaqin MC550 Anyone?

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