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  1. Need Advice for Bi-amping
  2. Baldwin organ amp
  3. Octal Aikido with gain/buffer switch?
  4. Harman Kardon Stereo Tube Amp Oscillator Help!
  5. Electro-Harmonex 6973 Question
  6. Power and plate current in a SE amp
  7. 6883B for use as a audio output tube
  8. "Distortionless" Tube Oscillator -Cutting Edge Technology
  9. Feedback RH84 6v6
  10. copper wire from socket bolts to exhaust tip?
  11. What KT88 brands can handle high B+ triode connected?
  12. Williamson-style circuit with Schade feedback using pentode driver stage?
  13. potentiometer for blackface deluxe reverb
  14. GM70 tube copper vs graphite plate???
  15. +/-floating tube PSU for guitar ?! Schematic error ?
  16. About Dark Heater Tubes.
  17. Sylvania 5692 Black base tubes
  18. Tube Tester in Montreal
  19. tubelab.com's super tube SE
  20. Unsual use of triode?
  21. What the hell is Class A3 ?
  22. High voltage triodes (true triodes)
  23. Ceramic Filter Selection
  24. Eagle library for CMC teflon 9-pin tube socket?
  25. Power supply mosfet vs choke filter
  26. Capacitors used in Conrad Johnson PV7
  27. HH Scott 299A center out to subwoofer
  28. PP Amplifier Advice Sought: EL34/KT88 UL/Triode
  29. Search for StepUp 12V->142V @ 6mA
  30. Magnavox 8802 upgrade suggestions?
  31. filament supply using two bridges
  32. 6N2P-EV gain factor ??
  33. Talking tube replacements
  34. Audi Institute VR70E amp
  35. Share Fixed Bias using Diodes
  36. Finished my Tube DI/Preamp
  37. Arcturus Blue Tubes
  38. share your experience on sound of hybrid amps
  39. ideas for a simple ECL82/86 p-p amp?
  40. Tube replacements or substitution
  41. 12ax7 / 12au7
  42. Triode Loadline Calculator
  43. Troubleshooting a Fender Champion 600
  44. High Voltage Derived Bias Supply
  45. Universal hybrid triode-mosfet input/drive stage
  46. IT coupled 1624 or 807 amp
  47. Raytheon / Western Electric JW-5755 / 420A
  48. Calculate unknown operating point from known cathode resistor
  49. 5763 triode curves
  50. HICKOK 539a QUESTION
  51. Constant current heaters
  52. max G2 voltage 1624 tube (Tabor)
  53. Need reference for Dynaco MKIV amp build
  54. Biasing Valve on Bipolar Power Supply
  55. Tubelab sse choke input 6v6
  56. $1800 tube amp
  57. Testing a 6N3 5670 etc on a B&K 600 tester
  58. Could anyone shed any light on this amp for me?
  59. Translation Russian EL84SE design please?
  60. Determining plate and screen voltage
  61. I Don't want to set the forum on fire . . .
  62. Valab Ultra Low Noise Regulatible
  63. Westinghouse 6973 Tube
  64. Which is worth burning or keeping
  65. OPT position
  66. Remove volume pot
  67. Headphone amp ideas?
  68. Good Looking 6SN7
  69. UTC Transformer
  70. Cap substitution help
  71. Edcor replacement for w5m peerless opt
  72. Audyn True copper caps.
  73. No Feedback Balanced Line Design
  74. KT120 PP - "low power" baptized Vitruvian amplifier
  75. Senior Design Project
  76. Hovland Sapphire guidance needed
  77. Question about specialized OPT
  78. My first build tubelab SE
  79. k16ls tube amp on/off switch?
  80. SY Tube Phono Improvements?
  81. Tube newbie, anyone familar with s-5 k-502? Help needed please
  82. TVA-1 Michaelson & Austin with problems
  83. New to HIFI tube need advice
  84. Crosstalk between Triodes in Dual Triode Tubes
  85. 6L6GC instead of EL34
  86. Schade feedback and CFB
  87. Sansui AU-70 - Help Needed
  88. Pentode C.F, where to connect the suppressor grid ?
  89. Separate PSU for PP EL34 / 6SN7GT integrated amp
  90. Simple SE driver with mosfet (6sn7/307A) IRF820
  91. Is it safe to run pentode w/ no screen voltage for a min?
  92. Low B+ and CCS question
  93. Has anyone ever used slate in audio?
  94. Semi-Fixed Bias?
  95. Transformers MIC and Phono
  96. Russian capacitor markings
  97. 6L6GC...More Voltage...or More Current?
  98. help me
  99. Anybody built/heard Melquiades amp
  100. Elevated grid bias
  101. Oscillation found in Luxman LX33
  102. RCA phono amp project
  103. Test of 45 Triode with EICO 625?
  104. Standard Silicon Diode Rectifier's VS Ultra Fast
  105. Output Transformer for L3 pre Audio Note
  106. "Boosted" Triode operation?
  107. 6HB6 UL push pull amp
  108. Interstage transformer ratio, spacecharge tubes in PP
  109. 6N6P line stage
  110. Revamping Tube Amp Monoblock - capacitor grounding concern
  111. 845 set bias.
  112. How to improve on a working Hybrid Amp: 832A Tube with MOSFETs
  113. tube outputs
  114. Coupling Cap Consistency
  115. Volume adjustment on 8ch at once
  116. Sub minature tube gain stage question.
  117. DHT PSE 2A3
  118. Plate voltage mic pre
  119. Estimating load for Duncan Amps PSU tool HOWTO?
  120. Shuguang Treasure Series 300B-Z not satisfactory!
  121. Choosing OP of small signal tubes with CCS in the cathode
  122. Aikido help needed
  123. Exploding 300B
  124. power output of EL34
  125. 76tube into C3M (triode) via LL1660 to PP outputstage
  126. best operating points for e182cc tube
  127. Any thoughts about this volume/bal arrangement
  128. Filament tension spring material
  129. DC coupled SE SChade amp
  130. First build 6V6 based
  131. Failed Converting UL to Pentode!?
  132. 1955 kids record player hum puzzle
  133. subwoofer output from my tube preamp
  134. EL84 SE Amp - specific transformer
  135. "GOOD" backup KT-88
  136. New or Old Output Transformer?
  137. Motorola console recap question
  138. Plate voltage on preamp tube too high
  139. Good valve design calculator website
  140. Ultra-on push-pull tetrode 6550
  141. My introduction to tube amps. The good, the bad, and the ugly.
  142. How do I calculate local feedback %?
  143. Newbie greeting & Resource
  144. Tips/Help With a Dying OTL Headphone Amp
  145. 6B4G and ECC83
  146. Maron buys a tube amp
  147. Newbie
  148. 845 AC filaments, my experience
  149. 8552 finals ?
  150. Low voltage 3W S.E. little amp, need comments and suggestions
  151. Single ended push pull ultra linear or?...
  152. Hello and questions about Magnavox SE amp
  153. Amp identification
  154. Millett DCPP No Output.
  155. using a Hammond 835 interstage ?
  156. Recommendation on versitile tube tester
  157. Mullard 6SN7GT
  158. RIAA tube pre amp
  159. Cheapo Ebay voltmeter
  160. Jolida SJ202a Schematic
  161. Tetra All in One Phono Preamp voltage
  162. Console pull advice
  163. Local feedback on IT secundary (PP amp)
  164. Computerized Curve Tracer Project
  165. Is 6w enough and can i use phone power amp?
  166. Yaqin MS-12B preamp - how to get more gain?
  167. Inductor Multiplier Patent
  168. KT90
  169. 6L6GC Hybrid Partial Feedback
  170. 7868 to 7591a conversion help
  171. SOS! 21st Century Regulator Dead!
  172. Transformer Placement - To shield or not to Shield
  173. cap multiplier suggestions wanted
  174. Bridging stereo tube amp to one more powerful mono output
  175. Weird pentode connections
  176. My last S.E. amplifier (pentode driver + Beam Power Tube Ultralinear mode)
  177. Please help info UTC transformer
  178. ARC SP-6B Tube Heaters Glow Very Bright at Startup
  179. SUPER budget DIY tube amp - need help
  180. LEAK TL/12
  181. What decides gain of a valve stage ?
  182. 6AH4 Preamp..A great option for line stage
  183. Kondo M77
  184. 2C22 SRPP
  185. Resistor question
  186. Problem with X10-d as preamp
  187. Pilot One AA-410 1950s
  188. Measuring VAC on coupling cap
  189. Tube phono stage load
  190. ANUBIS - Another Tube-Transistor Hybrid Amplifier
  191. Panasonic HV Electrolitics
  192. Unison Research Smart 845 & dripping sticky goo!
  193. Seeking Danish help to locate two 1950's magazine articles
  194. Valve cruelty ...
  195. Re- calculating RIAA network
  196. Just another cool toy to look at
  197. sherwood s-5000 vs. s-5500 iv OPt's
  198. Sound of 300B SET by Satoru Kobayashi
  199. Using UL taps instead of the anode taps to alter inpedence
  200. Help fast please! Type 3 Ei KT90's - Pre or Post War? How do you know?
  201. 807 PSE schematic design need
  202. 3 direct coupled 2A3 amps
  203. Tube preamplifier with chip power amp
  204. Anyone used IXCP10M90S ltspice model ?
  205. and the quiz identify power trans continue
  206. Valve HT power supply common-mode noise
  207. 12AX7 and 6AS5 tube amplifier
  208. Working with Eagle and single channel tube amp board.
  209. New hands-on tutorial for Tube Newbies
  210. Help me to choose tube "1 no ring" "2 has ring"
  211. Chinese board 6L6 KT88 is it worth???
  212. Valve Rectifier Testing
  213. Harman Kardon TA-120 Output Transformer
  214. Single ended transformer as pushpull?
  215. Resurrecting a nOrh SE9 Integrated Amp
  216. Fisher Amps?
  217. Repurposing an old Gulbransen Organ tube amp
  218. Help, the sound is silken or blow up?
  219. Now here's an idea - The DIYF QUAD
  220. Parallel output SE amp options
  221. What tube is equivalent 5879?
  222. Filament Xfmr: can I trade volts for amps?
  223. GU50 PP possible with this iron ?
  224. Hifi tube amps - overall sound
  225. Preamp grounding questions
  226. Tube rectifiers
  227. DIY PL84 + E180F
  228. McIntosh on How It's Made
  229. Choke input LCLC supply - question on minimum current
  230. EBC3 & CBL1 Tube AMP
  231. CLASS A HYBRID POWER AMP
  232. MXL V69 Mogami Edition signal cuts in/out
  233. Ultra-linear plate characteristic curve for EL34
  234. Need help to modify circuit to suit replacement power XFMR
  235. Line preamp schematic for 5GH8A wanted.
  236. help please - modify phono corrector
  237. Help me: Brimar 5Z4G, 5Y3GT is this an equivalent to a 5Y3WGTA?
  238. A Russian glow tube regulator with specs of 75V 60mA ?
  239. Help with filament for ecc88
  240. How much power transformer is necessary?
  241. testing the 300b tube
  242. Headphone amplifier outputs, so many permutations!
  243. tube footprint in Eagle
  244. Need VTVM repairs
  245. First Timer - DIY Tube Amp
  246. Help identify OT please
  247. gEDA and tubes
  248. Triode Electronics Issues?
  249. RCA BC5B consolette manual?
  250. Help with converting EL37 amp to KT66

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