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  1. How to improve on a working Hybrid Amp: 832A Tube with MOSFETs
  2. tube outputs
  3. Coupling Cap Consistency
  4. Volume adjustment on 8ch at once
  5. Sub minature tube gain stage question.
  6. DHT PSE 2A3
  7. Plate voltage mic pre
  8. Estimating load for Duncan Amps PSU tool HOWTO?
  9. Shuguang Treasure Series 300B-Z not satisfactory!
  10. Choosing OP of small signal tubes with CCS in the cathode
  11. Aikido help needed
  12. Exploding 300B
  13. power output of EL34
  14. 76tube into C3M (triode) via LL1660 to PP outputstage
  15. best operating points for e182cc tube
  16. Any thoughts about this volume/bal arrangement
  17. Filament tension spring material
  18. DC coupled SE SChade amp
  19. First build 6V6 based
  20. Failed Converting UL to Pentode!?
  21. 1955 kids record player hum puzzle
  22. subwoofer output from my tube preamp
  23. EL84 SE Amp - specific transformer
  24. "GOOD" backup KT-88
  25. New or Old Output Transformer?
  26. Motorola console recap question
  27. Plate voltage on preamp tube too high
  28. Good valve design calculator website
  29. Ultra-on push-pull tetrode 6550
  30. My introduction to tube amps. The good, the bad, and the ugly.
  31. How do I calculate local feedback %?
  32. Newbie greeting & Resource
  33. Tips/Help With a Dying OTL Headphone Amp
  34. 6B4G and ECC83
  35. Maron buys a tube amp
  36. Newbie
  37. 845 AC filaments, my experience
  38. 8552 finals ?
  39. Low voltage 3W S.E. little amp, need comments and suggestions
  40. Single ended push pull ultra linear or?...
  41. Hello and questions about Magnavox SE amp
  42. Amp identification
  43. Millett DCPP No Output.
  44. using a Hammond 835 interstage ?
  45. Recommendation on versitile tube tester
  46. Mullard 6SN7GT
  47. RIAA tube pre amp
  48. Cheapo Ebay voltmeter
  49. Jolida SJ202a Schematic
  50. Tetra All in One Phono Preamp voltage
  51. Console pull advice
  52. Local feedback on IT secundary (PP amp)
  53. Computerized Curve Tracer Project
  54. Is 6w enough and can i use phone power amp?
  55. Yaqin MS-12B preamp - how to get more gain?
  56. Inductor Multiplier Patent
  57. KT90
  58. 6L6GC Hybrid Partial Feedback
  59. 7868 to 7591a conversion help
  60. SOS! 21st Century Regulator Dead!
  61. Transformer Placement - To shield or not to Shield
  62. cap multiplier suggestions wanted
  63. Bridging stereo tube amp to one more powerful mono output
  64. Weird pentode connections
  65. My last S.E. amplifier (pentode driver + Beam Power Tube Ultralinear mode)
  66. Please help info UTC transformer
  67. ARC SP-6B Tube Heaters Glow Very Bright at Startup
  68. SUPER budget DIY tube amp - need help
  69. LEAK TL/12
  70. What decides gain of a valve stage ?
  71. 6AH4 Preamp..A great option for line stage
  72. Kondo M77
  73. 2C22 SRPP
  74. Resistor question
  75. Problem with X10-d as preamp
  76. Pilot One AA-410 1950s
  77. Measuring VAC on coupling cap
  78. Tube phono stage load
  79. ANUBIS - Another Tube-Transistor Hybrid Amplifier
  80. Panasonic HV Electrolitics
  81. Unison Research Smart 845 & dripping sticky goo!
  82. Seeking Danish help to locate two 1950's magazine articles
  83. Valve cruelty ...
  84. Re- calculating RIAA network
  85. Just another cool toy to look at
  86. sherwood s-5000 vs. s-5500 iv OPt's
  87. Sound of 300B SET by Satoru Kobayashi
  88. Using UL taps instead of the anode taps to alter inpedence
  89. Help fast please! Type 3 Ei KT90's - Pre or Post War? How do you know?
  90. 807 PSE schematic design need
  91. 3 direct coupled 2A3 amps
  92. Tube preamplifier with chip power amp
  93. Anyone used IXCP10M90S ltspice model ?
  94. and the quiz identify power trans continue
  95. Valve HT power supply common-mode noise
  96. 12AX7 and 6AS5 tube amplifier
  97. Working with Eagle and single channel tube amp board.
  98. New hands-on tutorial for Tube Newbies
  99. Help me to choose tube "1 no ring" "2 has ring"
  100. Chinese board 6L6 KT88 is it worth???
  101. Valve Rectifier Testing
  102. Harman Kardon TA-120 Output Transformer
  103. Single ended transformer as pushpull?
  104. Resurrecting a nOrh SE9 Integrated Amp
  105. Fisher Amps?
  106. Repurposing an old Gulbransen Organ tube amp
  107. Help, the sound is silken or blow up?
  108. Now here's an idea - The DIYF QUAD
  109. Parallel output SE amp options
  110. What tube is equivalent 5879?
  111. Filament Xfmr: can I trade volts for amps?
  112. GU50 PP possible with this iron ?
  113. Hifi tube amps - overall sound
  114. Preamp grounding questions
  115. Tube rectifiers
  116. DIY PL84 + E180F
  117. McIntosh on How It's Made
  118. Choke input LCLC supply - question on minimum current
  119. EBC3 & CBL1 Tube AMP
  120. CLASS A HYBRID POWER AMP
  121. MXL V69 Mogami Edition signal cuts in/out
  122. Ultra-linear plate characteristic curve for EL34
  123. Need help to modify circuit to suit replacement power XFMR
  124. Line preamp schematic for 5GH8A wanted.
  125. help please - modify phono corrector
  126. Help me: Brimar 5Z4G, 5Y3GT is this an equivalent to a 5Y3WGTA?
  127. A Russian glow tube regulator with specs of 75V 60mA ?
  128. Help with filament for ecc88
  129. How much power transformer is necessary?
  130. testing the 300b tube
  131. Headphone amplifier outputs, so many permutations!
  132. tube footprint in Eagle
  133. Need VTVM repairs
  134. First Timer - DIY Tube Amp
  135. Help identify OT please
  136. gEDA and tubes
  137. Triode Electronics Issues?
  138. RCA BC5B consolette manual?
  139. Help with converting EL37 amp to KT66
  140. treadmill choke
  141. Preamp OPT
  142. Probleme with Volume Pot
  143. Simple SE 6L6 2 watt Homebrew
  144. is 6J32P equivalent of EF806 ?
  145. new tubes vs old ones
  146. 6p36s tube torture.
  147. Questions re: Bypass of B+ to differential amp
  148. Tube choice for yaqin cd3 buffer
  149. yesterday and today
  150. 260VDC need how much VAC transformer, is it 184VAC?
  151. preamp static
  152. Tube Line or Phono Stage bare kit
  153. Grounding of Hammond transformers
  154. Spud Amplifier with 6E5P Tube
  155. RAT Tube Tester build
  156. need a little help with identification
  157. aikido 12vac help needed
  158. Mullard 3-3 PCB
  159. OTL Using OPT
  160. VA/CF 6SN7 preamp input points?
  161. Copper losses in output transformers
  162. Yaqin MC550 Anyone?
  163. Bigger value output coupling
  164. DIY KT88 SEUL
  165. Leben CS300x feedback loop cap
  166. 6T8 / EABC80 as phase splitter / other uses
  167. Curve Tracer Screen Current
  168. Aikido Cathode Follower preamplifier with remote
  169. Grid Isolation in Fault Conditions
  170. Audio research ls2b parts list
  171. Heathkit USC-1 pre-amp
  172. Counterpoint SA3 Project
  173. Why such a high bias current on output valves ?
  174. how long before new tubes are run in ?
  175. Latest project, valve stereo disco mixer
  176. Mullard 5-20 EL34 biasing
  177. Parallel Driver Tubes?
  178. B+ Regulators
  179. Looking for Cary SLP98 Tube Preamplifier Schematic
  180. Hirage Le Monstre euals my best valve amps !
  181. Ran a JJ6v6S at 37 Watts, is it damaged?
  182. Zener diodes as protection clippers
  183. KT120 upgrade from KT88 6550
  184. panasonic dc link capacitors
  185. PTFE covered wire
  186. Grounding Qustion?
  187. New high-Z 1:1 input transformer from Hammond (10k:10k)
  188. Tube amp wiring and temperatures
  189. Pete Millett's Uniamp
  190. 211 tube. more time to brake in or bad tube
  191. Just a thought.
  192. Tube Heater Question
  193. No not Again...Aikido Plate dissipation question
  194. RH amp question!
  195. Mullard 5-20 power supply
  196. b&k 500 tube chart question
  197. Combining two single-ended tube stages for XLR-output - Question
  198. Scope pattern
  199. Diode cathode bias?
  200. Contact Enhancers/Corrosion Inhibitors for Aluminum
  201. My SE 46 tube monoblocks project
  202. E88CC / 6922 Datasheet Limiting Values
  203. Fisher Power Transformers
  204. does someone know about this russia amplifier ?
  205. How to improve this 6B4G push-pull circuit
  206. EL34 UL PP Transformer
  207. sears silvertone medalist stereo amp schematic needed
  208. Led bias on powertubes?
  209. Thermal Runaway
  210. Going from zero to pro tube amplifier. Resources?
  211. DIY Novar Socket
  212. Hum pickup from line output transformers
  213. Photo of a JJ 300B Filaments!! Please! :)
  214. Super FU-29
  215. Questions about Tim Mellow 6C33C OTL
  216. James or Silk for EL36SE?
  217. Dead KT88
  218. MS 110B KT88 INTEGRATED AMPLIFIER
  219. The Mighty 6550...
  220. recomend me some EL34 PLEASE
  221. Adding tone controls
  222. TJ Full Music 2A3/CNE
  223. groove tubes for headphone amp
  224. IXYS LTSpice Models (or something equivalent?)
  225. Soviet 6p3s/6p3s-e
  226. A case of direct coupled cathode follower
  227. SE45 schematic monoblock to stereo help
  228. Heathkit Schematics & Manuals
  229. 211 tube amp problem Help
  230. Department of inapprehensible schematics
  231. How low can you go...?
  232. EL34/6L6 Screen reistors...
  233. 809, anyone played around with them?
  234. Skinny OTL
  235. Adjust drive and output level with one knob
  236. Help me rack some Gates Program Amps
  237. Switch Mode Heater Supply
  238. Pre Ampje
  239. Maida Regulator Digital Control
  240. Worried by 110v reading on 6.3v tap....
  241. Safety Alert - UK Yaqin users
  242. 27> EL34 (triode) > 300B
  243. Rockola juke box amp - unusual features
  244. 3.5 watt ECL82 Amp
  245. 12BH7 Headphone Amp
  246. White Cathode Follower Quandary
  247. help in aikido for sennheiser hd580
  248. Home brew more economical than an ST-35
  249. Modeling Pull-Push transformer in LTspice
  250. The Fisher 400-C "Fixer-upper"

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