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  1. SY Tube Phono Improvements?
  2. Tube newbie, anyone familar with s-5 k-502? Help needed please
  3. TVA-1 Michaelson & Austin with problems
  4. New to HIFI tube need advice
  5. Crosstalk between Triodes in Dual Triode Tubes
  6. 6L6GC instead of EL34
  7. Schade feedback and CFB
  8. Sansui AU-70 - Help Needed
  9. Pentode C.F, where to connect the suppressor grid ?
  10. Separate PSU for PP EL34 / 6SN7GT integrated amp
  11. Simple SE driver with mosfet (6sn7/307A) IRF820
  12. Is it safe to run pentode w/ no screen voltage for a min?
  13. Low B+ and CCS question
  14. Has anyone ever used slate in audio?
  15. Semi-Fixed Bias?
  16. Transformers MIC and Phono
  17. 6L6GC...More Voltage...or More Current?
  18. help me
  19. Anybody built/heard Melquiades amp
  20. Elevated grid bias
  21. Oscillation found in Luxman LX33
  22. RCA phono amp project
  23. Test of 45 Triode with EICO 625?
  24. Standard Silicon Diode Rectifier's VS Ultra Fast
  25. Output Transformer for L3 pre Audio Note
  26. "Boosted" Triode operation?
  27. 6HB6 UL push pull amp
  28. Interstage transformer ratio, spacecharge tubes in PP
  29. 6N6P line stage
  30. Revamping Tube Amp Monoblock - capacitor grounding concern
  31. 845 set bias.
  32. How to improve on a working Hybrid Amp: 832A Tube with MOSFETs
  33. tube outputs
  34. Coupling Cap Consistency
  35. Volume adjustment on 8ch at once
  36. Sub minature tube gain stage question.
  37. DHT PSE 2A3
  38. Plate voltage mic pre
  39. Estimating load for Duncan Amps PSU tool HOWTO?
  40. Shuguang Treasure Series 300B-Z not satisfactory!
  41. Choosing OP of small signal tubes with CCS in the cathode
  42. Aikido help needed
  43. Exploding 300B
  44. power output of EL34
  45. 76 tube into C3M (triode) via LL1660 to PP output stage
  46. best operating points for e182cc tube
  47. Any thoughts about this volume/bal arrangement
  48. Filament tension spring material
  49. DC coupled SE Schade amp
  50. First build 6V6 based
  51. Failed Converting UL to Pentode!?
  52. 1955 kids record player hum puzzle
  53. subwoofer output from my tube preamp
  54. EL84 SE Amp - specific transformer
  55. "GOOD" backup KT-88
  56. New or Old Output Transformer?
  57. Motorola console recap question
  58. Plate voltage on preamp tube too high
  59. Good valve design calculator website
  60. Ultra-on push-pull tetrode 6550
  61. My introduction to tube amps. The good, the bad, and the ugly.
  62. How do I calculate local feedback %?
  63. Newbie greeting & Resource
  64. Tips/Help With a Dying OTL Headphone Amp
  65. 6B4G and ECC83
  66. Maron buys a tube amp
  67. Newbie
  68. 845 AC filaments, my experience
  69. 8552 finals ?
  70. Low voltage 3W S.E. little amp, need comments and suggestions
  71. Single ended push pull ultra linear or?...
  72. Hello and questions about Magnavox SE amp
  73. Amp identification
  74. Millett DCPP No Output.
  75. using a Hammond 835 interstage ?
  76. Recommendation on versitile tube tester
  77. Mullard 6SN7GT
  78. RIAA tube pre amp
  79. Cheapo Ebay voltmeter
  80. Jolida SJ202a Schematic
  81. Tetra All in One Phono Preamp voltage
  82. Console pull advice
  83. Local feedback on IT secondary (PP amp)
  84. Computerized Curve Tracer Project
  85. Is 6w enough and can i use phone power amp?
  86. Yaqin MS-12B preamp - how to get more gain?
  87. Inductor Multiplier Patent
  88. KT90
  89. 6L6GC Hybrid Partial Feedback
  90. 7868 to 7591a conversion help
  91. SOS! 21st Century Regulator Dead!
  92. Transformer Placement - To shield or not to Shield
  93. cap multiplier suggestions wanted
  94. Bridging stereo tube amp to one more powerful mono output
  95. Weird pentode connections
  96. My last S.E. amplifier (pentode driver + Beam Power Tube Ultralinear mode)
  97. Please help info UTC transformer
  98. ARC SP-6B Tube Heaters Glow Very Bright at Startup
  99. SUPER budget DIY tube amp - need help
  100. LEAK TL/12
  101. What decides gain of a valve stage ?
  102. 6AH4 Preamp..A great option for line stage
  103. Kondo M77
  104. 2C22 SRPP
  105. Resistor question
  106. Problem with X10-d as preamp
  107. Pilot One AA-410 1950s
  108. Measuring VAC on coupling cap
  109. Tube phono stage load
  110. ANUBIS - Another Tube-Transistor Hybrid Amplifier
  111. Panasonic HV Electrolitics
  112. Unison Research Smart 845 & dripping sticky goo!
  113. Seeking Danish help to locate two 1950's magazine articles
  114. Valve cruelty ...
  115. Re- calculating RIAA network
  116. Just another cool toy to look at
  117. sherwood s-5000 vs. s-5500 iv OPt's
  118. Sound of 300B SET by Satoru Kobayashi
  119. Using UL taps instead of the anode taps to alter inpedence
  120. Help fast please! Type 3 Ei KT90's - Pre or Post War? How do you know?
  121. 807 PSE schematic design need
  122. 3 direct coupled 2A3 amps
  123. Tube preamplifier with chip power amp
  124. Anyone used IXCP10M90S ltspice model ?
  125. and the quiz identify power trans continue
  126. Valve HT power supply common-mode noise
  127. 12AX7 and 6AS5 tube amplifier
  128. Working with Eagle and single channel tube amp board.
  129. New hands-on tutorial for Tube Newbies
  130. Help me to choose tube "1 no ring" "2 has ring"
  131. Chinese board 6L6 KT88 is it worth???
  132. Valve Rectifier Testing
  133. Harman Kardon TA-120 Output Transformer
  134. Single ended transformer as pushpull?
  135. Resurrecting a nOrh SE9 Integrated Amp
  136. Fisher Amps?
  137. Repurposing an old Gulbransen Organ tube amp
  138. Help, the sound is silken or blow up?
  139. Now here's an idea - The DIYF QUAD
  140. Parallel output SE amp options
  141. What tube is equivalent 5879?
  142. Filament Xfmr: can I trade volts for amps?
  143. GU50 PP possible with this iron ?
  144. Hifi tube amps - overall sound
  145. Preamp grounding questions
  146. Tube rectifiers
  147. DIY PL84 + E180F
  148. McIntosh on How It's Made
  149. Choke input LCLC supply - question on minimum current
  150. EBC3 & CBL1 Tube AMP
  151. CLASS A HYBRID POWER AMP
  152. MXL V69 Mogami Edition signal cuts in/out
  153. Ultra-linear plate characteristic curve for EL34
  154. Need help to modify circuit to suit replacement power XFMR
  155. Line preamp schematic for 5GH8A wanted.
  156. help please - modify phono corrector
  157. Help me: Brimar 5Z4G, 5Y3GT is this an equivalent to a 5Y3WGTA?
  158. A Russian glow tube regulator with specs of 75V 60mA ?
  159. Help with filament for ecc88
  160. How much power transformer is necessary?
  161. testing the 300b tube
  162. Headphone amplifier outputs, so many permutations!
  163. tube footprint in Eagle
  164. Need VTVM repairs
  165. First Timer - DIY Tube Amp
  166. Help identify OT please
  167. gEDA and tubes
  168. Triode Electronics Issues?
  169. RCA BC5B consolette manual?
  170. Help with converting EL37 amp to KT66
  171. treadmill choke
  172. Preamp OPT
  173. Probleme with Volume Pot
  174. Simple SE 6L6 2 watt Homebrew
  175. is 6J32P equivalent of EF806 ?
  176. new tubes vs old ones
  177. 6p36s tube torture.
  178. Questions re: Bypass of B+ to differential amp
  179. Tube choice for yaqin cd3 buffer
  180. yesterday and today
  181. 260VDC need how much VAC transformer, is it 184VAC?
  182. preamp static
  183. Tube Line or Phono Stage bare kit
  184. Grounding of Hammond transformers
  185. Spud Amplifier with 6E5P Tube
  186. RAT Tube Tester build
  187. need a little help with identification
  188. aikido 12vac help needed
  189. Mullard 3-3 PCB
  190. OTL Using OPT
  191. VA/CF 6SN7 preamp input points?
  192. Copper losses in output transformers
  193. Yaqin MC550 Anyone?
  194. Bigger value output coupling
  195. DIY KT88 SEUL
  196. Leben CS300x feedback loop cap
  197. 6T8 / EABC80 as phase splitter / other uses
  198. Curve Tracer Screen Current
  199. Aikido Cathode Follower preamplifier with remote
  200. Grid Isolation in Fault Conditions
  201. Audio research ls2b parts list
  202. Heathkit USC-1 pre-amp
  203. Counterpoint SA3 Project
  204. Why such a high bias current on output valves ?
  205. how long before new tubes are run in ?
  206. Latest project, valve stereo disco mixer
  207. Mullard 5-20 EL34 biasing
  208. Parallel Driver Tubes?
  209. B+ Regulators
  210. Looking for Cary SLP98 Tube Preamplifier Schematic
  211. Hirage Le Monstre equals my best valve amps !
  212. Ran a JJ6v6S at 37 Watts, is it damaged?
  213. Zener diodes as protection clippers
  214. KT120 upgrade from KT88 6550
  215. panasonic dc link capacitors
  216. PTFE covered wire
  217. Grounding Qustion?
  218. New high-Z 1:1 input transformer from Hammond (10k:10k)
  219. Tube amp wiring and temperatures
  220. Pete Millett's Uniamp
  221. 211 tube. more time to brake in or bad tube
  222. Just a thought.
  223. Tube Heater Question
  224. No not Again...Aikido Plate dissipation question
  225. RH amp question!
  226. Mullard 5-20 power supply
  227. b&k 500 tube chart question
  228. Combining two single-ended tube stages for XLR-output - Question
  229. Scope pattern
  230. Diode cathode bias?
  231. Contact Enhancers/Corrosion Inhibitors for Aluminum
  232. My SE 46 tube monoblocks project
  233. E88CC / 6922 Datasheet Limiting Values
  234. Fisher Power Transformers
  235. does someone know about this russia amplifier ?
  236. How to improve this 6B4G push-pull circuit
  237. EL34 UL PP Transformer
  238. sears silvertone medalist stereo amp schematic needed
  239. Led bias on powertubes?
  240. Thermal Runaway
  241. Going from zero to pro tube amplifier. Resources?
  242. DIY Novar Socket
  243. Hum pickup from line output transformers
  244. Photo of a JJ 300B Filaments!! Please! :)
  245. Super FU-29
  246. Questions about Tim Mellow 6C33C OTL
  247. James or Silk for EL36SE?
  248. Dead KT88
  249. MS 110B KT88 INTEGRATED AMPLIFIER
  250. The Mighty 6550...

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