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  1. Separate PSU for PP EL34 / 6SN7GT integrated amp
  2. Simple SE driver with mosfet (6sn7/307A) IRF820
  3. Is it safe to run pentode w/ no screen voltage for a min?
  4. Low B+ and CCS question
  5. Has anyone ever used slate in audio?
  6. Semi-Fixed Bias?
  7. Transformers MIC and Phono
  8. Russian capacitor markings
  9. 6L6GC...More Voltage...or More Current?
  10. help me
  11. Anybody built/heard Melquiades amp
  12. Elevated grid bias
  13. Oscillation found in Luxman LX33
  14. RCA phono amp project
  15. Test of 45 Triode with EICO 625?
  16. Standard Silicon Diode Rectifier's VS Ultra Fast
  17. Output Transformer for L3 pre Audio Note
  18. "Boosted" Triode operation?
  19. 6HB6 UL push pull amp
  20. Interstage transformer ratio, spacecharge tubes in PP
  21. 6N6P line stage
  22. Revamping Tube Amp Monoblock - capacitor grounding concern
  23. 845 set bias.
  24. How to improve on a working Hybrid Amp: 832A Tube with MOSFETs
  25. tube outputs
  26. Coupling Cap Consistency
  27. Volume adjustment on 8ch at once
  28. Sub minature tube gain stage question.
  29. DHT PSE 2A3
  30. Plate voltage mic pre
  31. Estimating load for Duncan Amps PSU tool HOWTO?
  32. Shuguang Treasure Series 300B-Z not satisfactory!
  33. Choosing OP of small signal tubes with CCS in the cathode
  34. Aikido help needed
  35. Exploding 300B
  36. power output of EL34
  37. 76tube into C3M (triode) via LL1660 to PP outputstage
  38. best operating points for e182cc tube
  39. Any thoughts about this volume/bal arrangement
  40. Filament tension spring material
  41. DC coupled SE SChade amp
  42. First build 6V6 based
  43. Failed Converting UL to Pentode!?
  44. 1955 kids record player hum puzzle
  45. subwoofer output from my tube preamp
  46. EL84 SE Amp - specific transformer
  47. "GOOD" backup KT-88
  48. New or Old Output Transformer?
  49. Motorola console recap question
  50. Plate voltage on preamp tube too high
  51. Good valve design calculator website
  52. Ultra-on push-pull tetrode 6550
  53. My introduction to tube amps. The good, the bad, and the ugly.
  54. How do I calculate local feedback %?
  55. Newbie greeting & Resource
  56. Tips/Help With a Dying OTL Headphone Amp
  57. 6B4G and ECC83
  58. Maron buys a tube amp
  59. Newbie
  60. 845 AC filaments, my experience
  61. 8552 finals ?
  62. Low voltage 3W S.E. little amp, need comments and suggestions
  63. Single ended push pull ultra linear or?...
  64. Hello and questions about Magnavox SE amp
  65. Amp identification
  66. Millett DCPP No Output.
  67. using a Hammond 835 interstage ?
  68. Recommendation on versitile tube tester
  69. Mullard 6SN7GT
  70. RIAA tube pre amp
  71. Cheapo Ebay voltmeter
  72. Jolida SJ202a Schematic
  73. Tetra All in One Phono Preamp voltage
  74. Console pull advice
  75. Local feedback on IT secundary (PP amp)
  76. Computerized Curve Tracer Project
  77. Is 6w enough and can i use phone power amp?
  78. Yaqin MS-12B preamp - how to get more gain?
  79. Inductor Multiplier Patent
  80. KT90
  81. 6L6GC Hybrid Partial Feedback
  82. 7868 to 7591a conversion help
  83. SOS! 21st Century Regulator Dead!
  84. Transformer Placement - To shield or not to Shield
  85. cap multiplier suggestions wanted
  86. Bridging stereo tube amp to one more powerful mono output
  87. Weird pentode connections
  88. My last S.E. amplifier (pentode driver + Beam Power Tube Ultralinear mode)
  89. Please help info UTC transformer
  90. ARC SP-6B Tube Heaters Glow Very Bright at Startup
  91. SUPER budget DIY tube amp - need help
  92. LEAK TL/12
  93. What decides gain of a valve stage ?
  94. 6AH4 Preamp..A great option for line stage
  95. Kondo M77
  96. 2C22 SRPP
  97. Resistor question
  98. Problem with X10-d as preamp
  99. Pilot One AA-410 1950s
  100. Measuring VAC on coupling cap
  101. Tube phono stage load
  102. ANUBIS - Another Tube-Transistor Hybrid Amplifier
  103. Panasonic HV Electrolitics
  104. Unison Research Smart 845 & dripping sticky goo!
  105. Seeking Danish help to locate two 1950's magazine articles
  106. Valve cruelty ...
  107. Re- calculating RIAA network
  108. Just another cool toy to look at
  109. sherwood s-5000 vs. s-5500 iv OPt's
  110. Sound of 300B SET by Satoru Kobayashi
  111. Using UL taps instead of the anode taps to alter inpedence
  112. Help fast please! Type 3 Ei KT90's - Pre or Post War? How do you know?
  113. 807 PSE schematic design need
  114. 3 direct coupled 2A3 amps
  115. Tube preamplifier with chip power amp
  116. Anyone used IXCP10M90S ltspice model ?
  117. and the quiz identify power trans continue
  118. Valve HT power supply common-mode noise
  119. 12AX7 and 6AS5 tube amplifier
  120. Working with Eagle and single channel tube amp board.
  121. New hands-on tutorial for Tube Newbies
  122. Help me to choose tube "1 no ring" "2 has ring"
  123. Chinese board 6L6 KT88 is it worth???
  124. Valve Rectifier Testing
  125. Harman Kardon TA-120 Output Transformer
  126. Single ended transformer as pushpull?
  127. Resurrecting a nOrh SE9 Integrated Amp
  128. Fisher Amps?
  129. Repurposing an old Gulbransen Organ tube amp
  130. Help, the sound is silken or blow up?
  131. Now here's an idea - The DIYF QUAD
  132. Parallel output SE amp options
  133. What tube is equivalent 5879?
  134. Filament Xfmr: can I trade volts for amps?
  135. GU50 PP possible with this iron ?
  136. Hifi tube amps - overall sound
  137. Preamp grounding questions
  138. Tube rectifiers
  139. DIY PL84 + E180F
  140. McIntosh on How It's Made
  141. Choke input LCLC supply - question on minimum current
  142. EBC3 & CBL1 Tube AMP
  143. CLASS A HYBRID POWER AMP
  144. MXL V69 Mogami Edition signal cuts in/out
  145. Ultra-linear plate characteristic curve for EL34
  146. Need help to modify circuit to suit replacement power XFMR
  147. Line preamp schematic for 5GH8A wanted.
  148. help please - modify phono corrector
  149. Help me: Brimar 5Z4G, 5Y3GT is this an equivalent to a 5Y3WGTA?
  150. A Russian glow tube regulator with specs of 75V 60mA ?
  151. Help with filament for ecc88
  152. How much power transformer is necessary?
  153. testing the 300b tube
  154. Headphone amplifier outputs, so many permutations!
  155. tube footprint in Eagle
  156. Need VTVM repairs
  157. First Timer - DIY Tube Amp
  158. Help identify OT please
  159. gEDA and tubes
  160. Triode Electronics Issues?
  161. RCA BC5B consolette manual?
  162. Help with converting EL37 amp to KT66
  163. treadmill choke
  164. Preamp OPT
  165. Probleme with Volume Pot
  166. Simple SE 6L6 2 watt Homebrew
  167. is 6J32P equivalent of EF806 ?
  168. new tubes vs old ones
  169. 6p36s tube torture.
  170. Questions re: Bypass of B+ to differential amp
  171. Tube choice for yaqin cd3 buffer
  172. yesterday and today
  173. 260VDC need how much VAC transformer, is it 184VAC?
  174. preamp static
  175. Tube Line or Phono Stage bare kit
  176. Grounding of Hammond transformers
  177. Spud Amplifier with 6E5P Tube
  178. RAT Tube Tester build
  179. need a little help with identification
  180. aikido 12vac help needed
  181. Mullard 3-3 PCB
  182. OTL Using OPT
  183. VA/CF 6SN7 preamp input points?
  184. Copper losses in output transformers
  185. Yaqin MC550 Anyone?
  186. Bigger value output coupling
  187. DIY KT88 SEUL
  188. Leben CS300x feedback loop cap
  189. 6T8 / EABC80 as phase splitter / other uses
  190. Curve Tracer Screen Current
  191. Aikido Cathode Follower preamplifier with remote
  192. Grid Isolation in Fault Conditions
  193. Audio research ls2b parts list
  194. Heathkit USC-1 pre-amp
  195. Counterpoint SA3 Project
  196. Why such a high bias current on output valves ?
  197. how long before new tubes are run in ?
  198. Latest project, valve stereo disco mixer
  199. Mullard 5-20 EL34 biasing
  200. Parallel Driver Tubes?
  201. B+ Regulators
  202. Looking for Cary SLP98 Tube Preamplifier Schematic
  203. Hirage Le Monstre euals my best valve amps !
  204. Ran a JJ6v6S at 37 Watts, is it damaged?
  205. Zener diodes as protection clippers
  206. KT120 upgrade from KT88 6550
  207. panasonic dc link capacitors
  208. PTFE covered wire
  209. Grounding Qustion?
  210. New high-Z 1:1 input transformer from Hammond (10k:10k)
  211. Tube amp wiring and temperatures
  212. Pete Millett's Uniamp
  213. 211 tube. more time to brake in or bad tube
  214. Just a thought.
  215. Tube Heater Question
  216. No not Again...Aikido Plate dissipation question
  217. RH amp question!
  218. Mullard 5-20 power supply
  219. b&k 500 tube chart question
  220. Combining two single-ended tube stages for XLR-output - Question
  221. Scope pattern
  222. Diode cathode bias?
  223. Contact Enhancers/Corrosion Inhibitors for Aluminum
  224. My SE 46 tube monoblocks project
  225. E88CC / 6922 Datasheet Limiting Values
  226. Fisher Power Transformers
  227. does someone know about this russia amplifier ?
  228. How to improve this 6B4G push-pull circuit
  229. EL34 UL PP Transformer
  230. sears silvertone medalist stereo amp schematic needed
  231. Led bias on powertubes?
  232. Thermal Runaway
  233. Going from zero to pro tube amplifier. Resources?
  234. DIY Novar Socket
  235. Hum pickup from line output transformers
  236. Photo of a JJ 300B Filaments!! Please! :)
  237. Super FU-29
  238. Questions about Tim Mellow 6C33C OTL
  239. James or Silk for EL36SE?
  240. Dead KT88
  241. MS 110B KT88 INTEGRATED AMPLIFIER
  242. The Mighty 6550...
  243. recomend me some EL34 PLEASE
  244. Adding tone controls
  245. TJ Full Music 2A3/CNE
  246. groove tubes for headphone amp
  247. IXYS LTSpice Models (or something equivalent?)
  248. Soviet 6p3s/6p3s-e
  249. A case of direct coupled cathode follower
  250. SE45 schematic monoblock to stereo help

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