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  1. New to HIFI tube need advice
  2. Crosstalk between Triodes in Dual Triode Tubes
  3. 6L6GC instead of EL34
  4. Schade feedback and CFB
  5. Sansui AU-70 - Help Needed
  6. Pentode C.F, where to connect the suppressor grid ?
  7. Separate PSU for PP EL34 / 6SN7GT integrated amp
  8. Simple SE driver with mosfet (6sn7/307A) IRF820
  9. Is it safe to run pentode w/ no screen voltage for a min?
  10. Low B+ and CCS question
  11. Has anyone ever used slate in audio?
  12. Semi-Fixed Bias?
  13. Transformers MIC and Phono
  14. Russian capacitor markings
  15. 6L6GC...More Voltage...or More Current?
  16. help me
  17. Anybody built/heard Melquiades amp
  18. Elevated grid bias
  19. Oscillation found in Luxman LX33
  20. RCA phono amp project
  21. Test of 45 Triode with EICO 625?
  22. Standard Silicon Diode Rectifier's VS Ultra Fast
  23. Output Transformer for L3 pre Audio Note
  24. "Boosted" Triode operation?
  25. 6HB6 UL push pull amp
  26. Interstage transformer ratio, spacecharge tubes in PP
  27. 6N6P line stage
  28. Revamping Tube Amp Monoblock - capacitor grounding concern
  29. 845 set bias.
  30. How to improve on a working Hybrid Amp: 832A Tube with MOSFETs
  31. tube outputs
  32. Coupling Cap Consistency
  33. Volume adjustment on 8ch at once
  34. Sub minature tube gain stage question.
  35. DHT PSE 2A3
  36. Plate voltage mic pre
  37. Estimating load for Duncan Amps PSU tool HOWTO?
  38. Shuguang Treasure Series 300B-Z not satisfactory!
  39. Choosing OP of small signal tubes with CCS in the cathode
  40. Aikido help needed
  41. Exploding 300B
  42. power output of EL34
  43. 76 tube into C3M (triode) via LL1660 to PP output stage
  44. best operating points for e182cc tube
  45. Any thoughts about this volume/bal arrangement
  46. Filament tension spring material
  47. DC coupled SE Schade amp
  48. First build 6V6 based
  49. Failed Converting UL to Pentode!?
  50. 1955 kids record player hum puzzle
  51. subwoofer output from my tube preamp
  52. EL84 SE Amp - specific transformer
  53. "GOOD" backup KT-88
  54. New or Old Output Transformer?
  55. Motorola console recap question
  56. Plate voltage on preamp tube too high
  57. Good valve design calculator website
  58. Ultra-on push-pull tetrode 6550
  59. My introduction to tube amps. The good, the bad, and the ugly.
  60. How do I calculate local feedback %?
  61. Newbie greeting & Resource
  62. Tips/Help With a Dying OTL Headphone Amp
  63. 6B4G and ECC83
  64. Maron buys a tube amp
  65. Newbie
  66. 845 AC filaments, my experience
  67. 8552 finals ?
  68. Low voltage 3W S.E. little amp, need comments and suggestions
  69. Single ended push pull ultra linear or?...
  70. Hello and questions about Magnavox SE amp
  71. Amp identification
  72. Millett DCPP No Output.
  73. using a Hammond 835 interstage ?
  74. Recommendation on versitile tube tester
  75. Mullard 6SN7GT
  76. RIAA tube pre amp
  77. Cheapo Ebay voltmeter
  78. Jolida SJ202a Schematic
  79. Tetra All in One Phono Preamp voltage
  80. Console pull advice
  81. Local feedback on IT secondary (PP amp)
  82. Computerized Curve Tracer Project
  83. Is 6w enough and can i use phone power amp?
  84. Yaqin MS-12B preamp - how to get more gain?
  85. Inductor Multiplier Patent
  86. KT90
  87. 6L6GC Hybrid Partial Feedback
  88. 7868 to 7591a conversion help
  89. SOS! 21st Century Regulator Dead!
  90. Transformer Placement - To shield or not to Shield
  91. cap multiplier suggestions wanted
  92. Bridging stereo tube amp to one more powerful mono output
  93. Weird pentode connections
  94. My last S.E. amplifier (pentode driver + Beam Power Tube Ultralinear mode)
  95. Please help info UTC transformer
  96. ARC SP-6B Tube Heaters Glow Very Bright at Startup
  97. SUPER budget DIY tube amp - need help
  98. LEAK TL/12
  99. What decides gain of a valve stage ?
  100. 6AH4 Preamp..A great option for line stage
  101. Kondo M77
  102. 2C22 SRPP
  103. Resistor question
  104. Problem with X10-d as preamp
  105. Pilot One AA-410 1950s
  106. Measuring VAC on coupling cap
  107. Tube phono stage load
  108. ANUBIS - Another Tube-Transistor Hybrid Amplifier
  109. Panasonic HV Electrolitics
  110. Unison Research Smart 845 & dripping sticky goo!
  111. Seeking Danish help to locate two 1950's magazine articles
  112. Valve cruelty ...
  113. Re- calculating RIAA network
  114. Just another cool toy to look at
  115. sherwood s-5000 vs. s-5500 iv OPt's
  116. Sound of 300B SET by Satoru Kobayashi
  117. Using UL taps instead of the anode taps to alter inpedence
  118. Help fast please! Type 3 Ei KT90's - Pre or Post War? How do you know?
  119. 807 PSE schematic design need
  120. 3 direct coupled 2A3 amps
  121. Tube preamplifier with chip power amp
  122. Anyone used IXCP10M90S ltspice model ?
  123. and the quiz identify power trans continue
  124. Valve HT power supply common-mode noise
  125. 12AX7 and 6AS5 tube amplifier
  126. Working with Eagle and single channel tube amp board.
  127. New hands-on tutorial for Tube Newbies
  128. Help me to choose tube "1 no ring" "2 has ring"
  129. Chinese board 6L6 KT88 is it worth???
  130. Valve Rectifier Testing
  131. Harman Kardon TA-120 Output Transformer
  132. Single ended transformer as pushpull?
  133. Resurrecting a nOrh SE9 Integrated Amp
  134. Fisher Amps?
  135. Repurposing an old Gulbransen Organ tube amp
  136. Help, the sound is silken or blow up?
  137. Now here's an idea - The DIYF QUAD
  138. Parallel output SE amp options
  139. What tube is equivalent 5879?
  140. Filament Xfmr: can I trade volts for amps?
  141. GU50 PP possible with this iron ?
  142. Hifi tube amps - overall sound
  143. Preamp grounding questions
  144. Tube rectifiers
  145. DIY PL84 + E180F
  146. McIntosh on How It's Made
  147. Choke input LCLC supply - question on minimum current
  148. EBC3 & CBL1 Tube AMP
  149. CLASS A HYBRID POWER AMP
  150. MXL V69 Mogami Edition signal cuts in/out
  151. Ultra-linear plate characteristic curve for EL34
  152. Need help to modify circuit to suit replacement power XFMR
  153. Line preamp schematic for 5GH8A wanted.
  154. help please - modify phono corrector
  155. Help me: Brimar 5Z4G, 5Y3GT is this an equivalent to a 5Y3WGTA?
  156. A Russian glow tube regulator with specs of 75V 60mA ?
  157. Help with filament for ecc88
  158. How much power transformer is necessary?
  159. testing the 300b tube
  160. Headphone amplifier outputs, so many permutations!
  161. tube footprint in Eagle
  162. Need VTVM repairs
  163. First Timer - DIY Tube Amp
  164. Help identify OT please
  165. gEDA and tubes
  166. Triode Electronics Issues?
  167. RCA BC5B consolette manual?
  168. Help with converting EL37 amp to KT66
  169. treadmill choke
  170. Preamp OPT
  171. Probleme with Volume Pot
  172. Simple SE 6L6 2 watt Homebrew
  173. is 6J32P equivalent of EF806 ?
  174. new tubes vs old ones
  175. 6p36s tube torture.
  176. Questions re: Bypass of B+ to differential amp
  177. Tube choice for yaqin cd3 buffer
  178. yesterday and today
  179. 260VDC need how much VAC transformer, is it 184VAC?
  180. preamp static
  181. Tube Line or Phono Stage bare kit
  182. Grounding of Hammond transformers
  183. Spud Amplifier with 6E5P Tube
  184. RAT Tube Tester build
  185. need a little help with identification
  186. aikido 12vac help needed
  187. Mullard 3-3 PCB
  188. OTL Using OPT
  189. VA/CF 6SN7 preamp input points?
  190. Copper losses in output transformers
  191. Yaqin MC550 Anyone?
  192. Bigger value output coupling
  193. DIY KT88 SEUL
  194. Leben CS300x feedback loop cap
  195. 6T8 / EABC80 as phase splitter / other uses
  196. Curve Tracer Screen Current
  197. Aikido Cathode Follower preamplifier with remote
  198. Grid Isolation in Fault Conditions
  199. Audio research ls2b parts list
  200. Heathkit USC-1 pre-amp
  201. Counterpoint SA3 Project
  202. Why such a high bias current on output valves ?
  203. how long before new tubes are run in ?
  204. Latest project, valve stereo disco mixer
  205. Mullard 5-20 EL34 biasing
  206. Parallel Driver Tubes?
  207. B+ Regulators
  208. Looking for Cary SLP98 Tube Preamplifier Schematic
  209. Hirage Le Monstre equals my best valve amps !
  210. Ran a JJ6v6S at 37 Watts, is it damaged?
  211. Zener diodes as protection clippers
  212. KT120 upgrade from KT88 6550
  213. panasonic dc link capacitors
  214. PTFE covered wire
  215. Grounding Qustion?
  216. New high-Z 1:1 input transformer from Hammond (10k:10k)
  217. Tube amp wiring and temperatures
  218. Pete Millett's Uniamp
  219. 211 tube. more time to brake in or bad tube
  220. Just a thought.
  221. Tube Heater Question
  222. No not Again...Aikido Plate dissipation question
  223. RH amp question!
  224. Mullard 5-20 power supply
  225. b&k 500 tube chart question
  226. Combining two single-ended tube stages for XLR-output - Question
  227. Scope pattern
  228. Diode cathode bias?
  229. Contact Enhancers/Corrosion Inhibitors for Aluminum
  230. My SE 46 tube monoblocks project
  231. E88CC / 6922 Datasheet Limiting Values
  232. Fisher Power Transformers
  233. does someone know about this russia amplifier ?
  234. How to improve this 6B4G push-pull circuit
  235. EL34 UL PP Transformer
  236. sears silvertone medalist stereo amp schematic needed
  237. Led bias on powertubes?
  238. Thermal Runaway
  239. Going from zero to pro tube amplifier. Resources?
  240. DIY Novar Socket
  241. Hum pickup from line output transformers
  242. Photo of a JJ 300B Filaments!! Please! :)
  243. Super FU-29
  244. Questions about Tim Mellow 6C33C OTL
  245. James or Silk for EL36SE?
  246. Dead KT88
  247. MS 110B KT88 INTEGRATED AMPLIFIER
  248. The Mighty 6550...
  249. recomend me some EL34 PLEASE
  250. Adding tone controls

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