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  1. Raytheon / Western Electric JW-5755 / 420A
  2. Calculate unknown operating point from known cathode resistor
  3. 5763 triode curves
  4. Constant current heaters
  5. max G2 voltage 1624 tube (Tabor)
  6. Need reference for Dynaco MKIV amp build
  7. Biasing Valve on Bipolar Power Supply
  8. $1800 tube amp
  9. Testing a 6N3 5670 etc on a B&K 600 tester
  10. Could anyone shed any light on this amp for me?
  11. Translation Russian EL84SE design please?
  12. Determining plate and screen voltage
  13. I Don't want to set the forum on fire . . .
  14. Valab Ultra Low Noise Regulatible
  15. Westinghouse 6973 Tube
  16. Which is worth burning or keeping
  17. OPT position
  18. Remove volume pot
  19. Headphone amp ideas?
  20. Good Looking 6SN7
  21. UTC Transformer
  22. Cap substitution help
  23. Edcor replacement for w5m peerless opt
  24. No Feedback Balanced Line Design
  25. KT120 PP - "low power" baptized Vitruvian amplifier
  26. Hovland Sapphire guidance needed
  27. Question about specialized OPT
  28. k16ls tube amp on/off switch?
  29. SY Tube Phono Improvements?
  30. Tube newbie, anyone familar with s-5 k-502? Help needed please
  31. TVA-1 Michaelson & Austin with problems
  32. New to HIFI tube need advice
  33. Crosstalk between Triodes in Dual Triode Tubes
  34. 6L6GC instead of EL34
  35. Schade feedback and CFB
  36. Sansui AU-70 - Help Needed
  37. Pentode C.F, where to connect the suppressor grid ?
  38. Separate PSU for PP EL34 / 6SN7GT integrated amp
  39. Simple SE driver with mosfet (6sn7/307A) IRF820
  40. Is it safe to run pentode w/ no screen voltage for a min?
  41. Low B+ and CCS question
  42. Has anyone ever used slate in audio?
  43. Semi-Fixed Bias?
  44. Transformers MIC and Phono
  45. 6L6GC...More Voltage...or More Current?
  46. help me
  47. Anybody built/heard Melquiades amp
  48. Elevated grid bias
  49. Oscillation found in Luxman LX33
  50. RCA phono amp project
  51. Test of 45 Triode with EICO 625?
  52. Standard Silicon Diode Rectifier's VS Ultra Fast
  53. Output Transformer for L3 pre Audio Note
  54. "Boosted" Triode operation?
  55. 6HB6 UL push pull amp
  56. Interstage transformer ratio, spacecharge tubes in PP
  57. 6N6P line stage
  58. Revamping Tube Amp Monoblock - capacitor grounding concern
  59. 845 set bias.
  60. How to improve on a working Hybrid Amp: 832A Tube with MOSFETs
  61. tube outputs
  62. Coupling Cap Consistency
  63. Volume adjustment on 8ch at once
  64. Sub minature tube gain stage question.
  65. DHT PSE 2A3
  66. Plate voltage mic pre
  67. Estimating load for Duncan Amps PSU tool HOWTO?
  68. Shuguang Treasure Series 300B-Z not satisfactory!
  69. Choosing OP of small signal tubes with CCS in the cathode
  70. Aikido help needed
  71. Exploding 300B
  72. power output of EL34
  73. 76 tube into C3M (triode) via LL1660 to PP output stage
  74. best operating points for e182cc tube
  75. Any thoughts about this volume/bal arrangement
  76. Filament tension spring material
  77. DC coupled SE Schade amp
  78. First build 6V6 based
  79. Failed Converting UL to Pentode!?
  80. 1955 kids record player hum puzzle
  81. subwoofer output from my tube preamp
  82. EL84 SE Amp - specific transformer
  83. "GOOD" backup KT-88
  84. New or Old Output Transformer?
  85. Motorola console recap question
  86. Plate voltage on preamp tube too high
  87. Good valve design calculator website
  88. Ultra-on push-pull tetrode 6550
  89. My introduction to tube amps. The good, the bad, and the ugly.
  90. How do I calculate local feedback %?
  91. Newbie greeting & Resource
  92. Tips/Help With a Dying OTL Headphone Amp
  93. 6B4G and ECC83
  94. Maron buys a tube amp
  95. Newbie
  96. 845 AC filaments, my experience
  97. 8552 finals ?
  98. Low voltage 3W S.E. little amp, need comments and suggestions
  99. Single ended push pull ultra linear or?...
  100. Hello and questions about Magnavox SE amp
  101. Amp identification
  102. Millett DCPP No Output.
  103. using a Hammond 835 interstage ?
  104. Mullard 6SN7GT
  105. RIAA tube pre amp
  106. Cheapo Ebay voltmeter
  107. Jolida SJ202a Schematic
  108. Tetra All in One Phono Preamp voltage
  109. Console pull advice
  110. Local feedback on IT secondary (PP amp)
  111. Is 6w enough and can i use phone power amp?
  112. Yaqin MS-12B preamp - how to get more gain?
  113. Inductor Multiplier Patent
  114. KT90
  115. 6L6GC Hybrid Partial Feedback
  116. 7868 to 7591a conversion help
  117. SOS! 21st Century Regulator Dead!
  118. Transformer Placement - To shield or not to Shield
  119. cap multiplier suggestions wanted
  120. Bridging stereo tube amp to one more powerful mono output
  121. Weird pentode connections
  122. My last S.E. amplifier (pentode driver + Beam Power Tube Ultralinear mode)
  123. Please help info UTC transformer
  124. ARC SP-6B Tube Heaters Glow Very Bright at Startup
  125. SUPER budget DIY tube amp - need help
  126. LEAK TL/12
  127. What decides gain of a valve stage ?
  128. 6AH4 Preamp..A great option for line stage
  129. Kondo M77
  130. 2C22 SRPP
  131. Resistor question
  132. Problem with X10-d as preamp
  133. Pilot One AA-410 1950s
  134. Measuring VAC on coupling cap
  135. Tube phono stage load
  136. ANUBIS - Another Tube-Transistor Hybrid Amplifier
  137. Panasonic HV Electrolitics
  138. Unison Research Smart 845 & dripping sticky goo!
  139. Seeking Danish help to locate two 1950's magazine articles
  140. Valve cruelty ...
  141. Re- calculating RIAA network
  142. Just another cool toy to look at
  143. sherwood s-5000 vs. s-5500 iv OPt's
  144. Sound of 300B SET by Satoru Kobayashi
  145. Using UL taps instead of the anode taps to alter inpedence
  146. Help fast please! Type 3 Ei KT90's - Pre or Post War? How do you know?
  147. 807 PSE schematic design need
  148. 3 direct coupled 2A3 amps
  149. Tube preamplifier with chip power amp
  150. and the quiz identify power trans continue
  151. Valve HT power supply common-mode noise
  152. 12AX7 and 6AS5 tube amplifier
  153. New hands-on tutorial for Tube Newbies
  154. Help me to choose tube "1 no ring" "2 has ring"
  155. Chinese board 6L6 KT88 is it worth???
  156. Valve Rectifier Testing
  157. Harman Kardon TA-120 Output Transformer
  158. Single ended transformer as pushpull?
  159. Resurrecting a nOrh SE9 Integrated Amp
  160. Fisher Amps?
  161. Repurposing an old Gulbransen Organ tube amp
  162. Help, the sound is silken or blow up?
  163. Now here's an idea - The DIYF QUAD
  164. Parallel output SE amp options
  165. What tube is equivalent 5879?
  166. Filament Xfmr: can I trade volts for amps?
  167. GU50 PP possible with this iron ?
  168. Hifi tube amps - overall sound
  169. Preamp grounding questions
  170. Tube rectifiers
  171. DIY PL84 + E180F
  172. McIntosh on How It's Made
  173. Choke input LCLC supply - question on minimum current
  174. EBC3 & CBL1 Tube AMP
  175. CLASS A HYBRID POWER AMP
  176. MXL V69 Mogami Edition signal cuts in/out
  177. Ultra-linear plate characteristic curve for EL34
  178. Need help to modify circuit to suit replacement power XFMR
  179. Line preamp schematic for 5GH8A wanted.
  180. help please - modify phono corrector
  181. Help me: Brimar 5Z4G, 5Y3GT is this an equivalent to a 5Y3WGTA?
  182. A Russian glow tube regulator with specs of 75V 60mA ?
  183. Help with filament for ecc88
  184. How much power transformer is necessary?
  185. testing the 300b tube
  186. Headphone amplifier outputs, so many permutations!
  187. tube footprint in Eagle
  188. First Timer - DIY Tube Amp
  189. Help identify OT please
  190. gEDA and tubes
  191. Triode Electronics Issues?
  192. RCA BC5B consolette manual?
  193. Help with converting EL37 amp to KT66
  194. Preamp OPT
  195. Probleme with Volume Pot
  196. Simple SE 6L6 2 watt Homebrew
  197. is 6J32P equivalent of EF806 ?
  198. new tubes vs old ones
  199. 6p36s tube torture.
  200. Questions re: Bypass of B+ to differential amp
  201. Tube choice for yaqin cd3 buffer
  202. yesterday and today
  203. 260VDC need how much VAC transformer, is it 184VAC?
  204. preamp static
  205. Tube Line or Phono Stage bare kit
  206. Grounding of Hammond transformers
  207. Spud Amplifier with 6E5P Tube
  208. need a little help with identification
  209. aikido 12vac help needed
  210. Mullard 3-3 PCB
  211. OTL Using OPT
  212. VA/CF 6SN7 preamp input points?
  213. Copper losses in output transformers
  214. Yaqin MC550 Anyone?
  215. Bigger value output coupling
  216. DIY KT88 SEUL
  217. Leben CS300x feedback loop cap
  218. 6T8 / EABC80 as phase splitter / other uses
  219. Curve Tracer Screen Current
  220. Aikido Cathode Follower preamplifier with remote
  221. Grid Isolation in Fault Conditions
  222. Audio research ls2b parts list
  223. Heathkit USC-1 pre-amp
  224. Counterpoint SA3 Project
  225. Why such a high bias current on output valves ?
  226. how long before new tubes are run in ?
  227. Mullard 5-20 EL34 biasing
  228. Parallel Driver Tubes?
  229. B+ Regulators
  230. Looking for Cary SLP98 Tube Preamplifier Schematic
  231. Hirage Le Monstre equals my best valve amps !
  232. Ran a JJ6v6S at 37 Watts, is it damaged?
  233. Zener diodes as protection clippers
  234. KT120 upgrade from KT88 6550
  235. Grounding Qustion?
  236. New high-Z 1:1 input transformer from Hammond (10k:10k)
  237. Tube amp wiring and temperatures
  238. Pete Millett's Uniamp
  239. 211 tube. more time to brake in or bad tube
  240. Just a thought.
  241. Tube Heater Question
  242. No not Again...Aikido Plate dissipation question
  243. RH amp question!
  244. Mullard 5-20 power supply
  245. Combining two single-ended tube stages for XLR-output - Question
  246. Scope pattern
  247. Diode cathode bias?
  248. Contact Enhancers/Corrosion Inhibitors for Aluminum
  249. My SE 46 tube monoblocks project
  250. E88CC / 6922 Datasheet Limiting Values

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