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  1. KT120 PP - "low power" baptized Vitruvian amplifier
  2. Senior Design Project
  3. Hovland Sapphire guidance needed
  4. Question about specialized OPT
  5. My first build tubelab SE
  6. k16ls tube amp on/off switch?
  7. SY Tube Phono Improvements?
  8. Tube newbie, anyone familar with s-5 k-502? Help needed please
  9. TVA-1 Michaelson & Austin with problems
  10. New to HIFI tube need advice
  11. Crosstalk between Triodes in Dual Triode Tubes
  12. 6L6GC instead of EL34
  13. Schade feedback and CFB
  14. Sansui AU-70 - Help Needed
  15. Pentode C.F, where to connect the suppressor grid ?
  16. Separate PSU for PP EL34 / 6SN7GT integrated amp
  17. Simple SE driver with mosfet (6sn7/307A) IRF820
  18. Is it safe to run pentode w/ no screen voltage for a min?
  19. Low B+ and CCS question
  20. Has anyone ever used slate in audio?
  21. Semi-Fixed Bias?
  22. Transformers MIC and Phono
  23. Russian capacitor markings
  24. 6L6GC...More Voltage...or More Current?
  25. help me
  26. Anybody built/heard Melquiades amp
  27. Elevated grid bias
  28. Oscillation found in Luxman LX33
  29. RCA phono amp project
  30. Test of 45 Triode with EICO 625?
  31. Standard Silicon Diode Rectifier's VS Ultra Fast
  32. Output Transformer for L3 pre Audio Note
  33. "Boosted" Triode operation?
  34. 6HB6 UL push pull amp
  35. Interstage transformer ratio, spacecharge tubes in PP
  36. 6N6P line stage
  37. Revamping Tube Amp Monoblock - capacitor grounding concern
  38. 845 set bias.
  39. How to improve on a working Hybrid Amp: 832A Tube with MOSFETs
  40. tube outputs
  41. Coupling Cap Consistency
  42. Volume adjustment on 8ch at once
  43. Sub minature tube gain stage question.
  44. DHT PSE 2A3
  45. Plate voltage mic pre
  46. Estimating load for Duncan Amps PSU tool HOWTO?
  47. Shuguang Treasure Series 300B-Z not satisfactory!
  48. Choosing OP of small signal tubes with CCS in the cathode
  49. Aikido help needed
  50. Exploding 300B
  51. power output of EL34
  52. 76tube into C3M (triode) via LL1660 to PP outputstage
  53. best operating points for e182cc tube
  54. Any thoughts about this volume/bal arrangement
  55. Filament tension spring material
  56. DC coupled SE SChade amp
  57. First build 6V6 based
  58. Failed Converting UL to Pentode!?
  59. 1955 kids record player hum puzzle
  60. subwoofer output from my tube preamp
  61. EL84 SE Amp - specific transformer
  62. "GOOD" backup KT-88
  63. New or Old Output Transformer?
  64. Motorola console recap question
  65. Plate voltage on preamp tube too high
  66. Good valve design calculator website
  67. Ultra-on push-pull tetrode 6550
  68. My introduction to tube amps. The good, the bad, and the ugly.
  69. How do I calculate local feedback %?
  70. Newbie greeting & Resource
  71. Tips/Help With a Dying OTL Headphone Amp
  72. 6B4G and ECC83
  73. Maron buys a tube amp
  74. Newbie
  75. 845 AC filaments, my experience
  76. 8552 finals ?
  77. Low voltage 3W S.E. little amp, need comments and suggestions
  78. Single ended push pull ultra linear or?...
  79. Hello and questions about Magnavox SE amp
  80. Amp identification
  81. Millett DCPP No Output.
  82. using a Hammond 835 interstage ?
  83. Recommendation on versitile tube tester
  84. Mullard 6SN7GT
  85. RIAA tube pre amp
  86. Cheapo Ebay voltmeter
  87. Jolida SJ202a Schematic
  88. Tetra All in One Phono Preamp voltage
  89. Console pull advice
  90. Local feedback on IT secundary (PP amp)
  91. Computerized Curve Tracer Project
  92. Is 6w enough and can i use phone power amp?
  93. Yaqin MS-12B preamp - how to get more gain?
  94. Inductor Multiplier Patent
  95. KT90
  96. 6L6GC Hybrid Partial Feedback
  97. 7868 to 7591a conversion help
  98. SOS! 21st Century Regulator Dead!
  99. Transformer Placement - To shield or not to Shield
  100. cap multiplier suggestions wanted
  101. Bridging stereo tube amp to one more powerful mono output
  102. Weird pentode connections
  103. My last S.E. amplifier (pentode driver + Beam Power Tube Ultralinear mode)
  104. Please help info UTC transformer
  105. ARC SP-6B Tube Heaters Glow Very Bright at Startup
  106. SUPER budget DIY tube amp - need help
  107. LEAK TL/12
  108. What decides gain of a valve stage ?
  109. 6AH4 Preamp..A great option for line stage
  110. Kondo M77
  111. 2C22 SRPP
  112. Resistor question
  113. Problem with X10-d as preamp
  114. Pilot One AA-410 1950s
  115. Measuring VAC on coupling cap
  116. Tube phono stage load
  117. ANUBIS - Another Tube-Transistor Hybrid Amplifier
  118. Panasonic HV Electrolitics
  119. Unison Research Smart 845 & dripping sticky goo!
  120. Seeking Danish help to locate two 1950's magazine articles
  121. Valve cruelty ...
  122. Re- calculating RIAA network
  123. Just another cool toy to look at
  124. sherwood s-5000 vs. s-5500 iv OPt's
  125. Sound of 300B SET by Satoru Kobayashi
  126. Using UL taps instead of the anode taps to alter inpedence
  127. Help fast please! Type 3 Ei KT90's - Pre or Post War? How do you know?
  128. 807 PSE schematic design need
  129. 3 direct coupled 2A3 amps
  130. Tube preamplifier with chip power amp
  131. Anyone used IXCP10M90S ltspice model ?
  132. and the quiz identify power trans continue
  133. Valve HT power supply common-mode noise
  134. 12AX7 and 6AS5 tube amplifier
  135. Working with Eagle and single channel tube amp board.
  136. New hands-on tutorial for Tube Newbies
  137. Help me to choose tube "1 no ring" "2 has ring"
  138. Chinese board 6L6 KT88 is it worth???
  139. Valve Rectifier Testing
  140. Harman Kardon TA-120 Output Transformer
  141. Single ended transformer as pushpull?
  142. Resurrecting a nOrh SE9 Integrated Amp
  143. Fisher Amps?
  144. Repurposing an old Gulbransen Organ tube amp
  145. Help, the sound is silken or blow up?
  146. Now here's an idea - The DIYF QUAD
  147. Parallel output SE amp options
  148. What tube is equivalent 5879?
  149. Filament Xfmr: can I trade volts for amps?
  150. GU50 PP possible with this iron ?
  151. Hifi tube amps - overall sound
  152. Preamp grounding questions
  153. Tube rectifiers
  154. DIY PL84 + E180F
  155. McIntosh on How It's Made
  156. Choke input LCLC supply - question on minimum current
  157. EBC3 & CBL1 Tube AMP
  158. CLASS A HYBRID POWER AMP
  159. MXL V69 Mogami Edition signal cuts in/out
  160. Ultra-linear plate characteristic curve for EL34
  161. Need help to modify circuit to suit replacement power XFMR
  162. Line preamp schematic for 5GH8A wanted.
  163. help please - modify phono corrector
  164. Help me: Brimar 5Z4G, 5Y3GT is this an equivalent to a 5Y3WGTA?
  165. A Russian glow tube regulator with specs of 75V 60mA ?
  166. Help with filament for ecc88
  167. How much power transformer is necessary?
  168. testing the 300b tube
  169. Headphone amplifier outputs, so many permutations!
  170. tube footprint in Eagle
  171. Need VTVM repairs
  172. First Timer - DIY Tube Amp
  173. Help identify OT please
  174. gEDA and tubes
  175. Triode Electronics Issues?
  176. RCA BC5B consolette manual?
  177. Help with converting EL37 amp to KT66
  178. treadmill choke
  179. Preamp OPT
  180. Probleme with Volume Pot
  181. Simple SE 6L6 2 watt Homebrew
  182. is 6J32P equivalent of EF806 ?
  183. new tubes vs old ones
  184. 6p36s tube torture.
  185. Questions re: Bypass of B+ to differential amp
  186. Tube choice for yaqin cd3 buffer
  187. yesterday and today
  188. 260VDC need how much VAC transformer, is it 184VAC?
  189. preamp static
  190. Tube Line or Phono Stage bare kit
  191. Grounding of Hammond transformers
  192. Spud Amplifier with 6E5P Tube
  193. RAT Tube Tester build
  194. need a little help with identification
  195. aikido 12vac help needed
  196. Mullard 3-3 PCB
  197. OTL Using OPT
  198. VA/CF 6SN7 preamp input points?
  199. Copper losses in output transformers
  200. Yaqin MC550 Anyone?
  201. Bigger value output coupling
  202. DIY KT88 SEUL
  203. Leben CS300x feedback loop cap
  204. 6T8 / EABC80 as phase splitter / other uses
  205. Curve Tracer Screen Current
  206. Aikido Cathode Follower preamplifier with remote
  207. Grid Isolation in Fault Conditions
  208. Audio research ls2b parts list
  209. Heathkit USC-1 pre-amp
  210. Counterpoint SA3 Project
  211. Why such a high bias current on output valves ?
  212. how long before new tubes are run in ?
  213. Latest project, valve stereo disco mixer
  214. Mullard 5-20 EL34 biasing
  215. Parallel Driver Tubes?
  216. B+ Regulators
  217. Looking for Cary SLP98 Tube Preamplifier Schematic
  218. Hirage Le Monstre euals my best valve amps !
  219. Ran a JJ6v6S at 37 Watts, is it damaged?
  220. Zener diodes as protection clippers
  221. KT120 upgrade from KT88 6550
  222. panasonic dc link capacitors
  223. PTFE covered wire
  224. Grounding Qustion?
  225. New high-Z 1:1 input transformer from Hammond (10k:10k)
  226. Tube amp wiring and temperatures
  227. Pete Millett's Uniamp
  228. 211 tube. more time to brake in or bad tube
  229. Just a thought.
  230. Tube Heater Question
  231. No not Again...Aikido Plate dissipation question
  232. RH amp question!
  233. Mullard 5-20 power supply
  234. b&k 500 tube chart question
  235. Combining two single-ended tube stages for XLR-output - Question
  236. Scope pattern
  237. Diode cathode bias?
  238. Contact Enhancers/Corrosion Inhibitors for Aluminum
  239. My SE 46 tube monoblocks project
  240. E88CC / 6922 Datasheet Limiting Values
  241. Fisher Power Transformers
  242. does someone know about this russia amplifier ?
  243. How to improve this 6B4G push-pull circuit
  244. EL34 UL PP Transformer
  245. sears silvertone medalist stereo amp schematic needed
  246. Led bias on powertubes?
  247. Thermal Runaway
  248. Going from zero to pro tube amplifier. Resources?
  249. DIY Novar Socket
  250. Hum pickup from line output transformers

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