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  1. tube circuit conversions?
  2. Current inrush limiter suggestions
  3. Repair of Philips EL6416 amplifiers.
  4. GU-19 In priboi
  5. Duncan Amps PSU Designer II
  6. using existing pre with this circuit
  7. Antek AT-070L Specs
  8. Unused tube sections
  9. Rewire Rectifier Sockets for Tube Substitution
  10. Shuguang 300BC
  11. Sn/Pb S-Sn/Cu ...
  12. What and Where is BAF?
  13. CCS plate follower 12bh7 schematic needed pls
  14. 300B DC heaters confusion
  15. Blue Tube Red Plating = Help!
  16. Tube bass preamplifier power supply (Need Help)
  17. Opera Consonance M500 mkii
  18. 6AC7EH Better but different
  19. For that hard to find 5HY 2 amp choke...
  20. Cleaning up an old ST-70 chassis
  21. Accuphase P250 Amplifier Schematic Requred
  22. Pls Help me, this 6C33C pp Schematic is OK?
  23. Loud Noise due to NFB
  24. NAMM Zoo 2011
  25. Damage to valve amp when powered up but disconnected to speakers?
  26. use more then 'maximum capacitance' after tube rectifier
  27. Headphone Tube Amp D3a
  28. Dared 5.1 tube amp
  29. Designing Transformers with J.C.Maxwell
  30. Cathode resistor calc?
  31. good circuit to use with Grounded Grid Pre
  32. JJ KT88 tubes glowing bright yellow.
  33. Transistorised-Tubed-Magnetic Amplifier
  34. ST-35 Tube Brands
  35. Where you buy iron transformer core for DIY audio transformer
  36. Improve this SP-11 HV supply?
  37. More Antek Iron
  38. Edcor Transformer Specs
  39. Volume control resistance question? Step Attenuator?
  40. Minimum space between 6V6 tube in Push-Pull Amp
  41. GE Jan 6550a for SET amp?
  42. Chassis mount connector strip
  43. Transformer winding - mysterious!
  44. can anyone identify theses OT markings?
  45. Excessive hum with 1960's amp.
  46. Western Electric/Hickock 600A
  47. Pete Millett Uniamp
  48. cathode resistor sudden rising value on 7591
  49. 7591 cathode resistor unstable
  50. David
  51. Looking for a DHT Pre & Phono design / ideas please
  52. Hi, New member just bought k272a kit from Oatley
  53. Building an amp from scratch - what features would i want
  54. Lafayette LA215 voltage problem !
  55. 12ax7: How to maximize output?
  56. Low voltage tube pre-amp for T-amp
  57. Hybrid bipolar amp
  58. Single end amp power supply upgrade
  59. Pentode curves - how to find operating point withoud going crazy?
  60. 6922 into 6H30 socket ?
  61. Headwize 6N1P OTL headphone amp having hum
  62. Need help to calculate R in a CCS!
  63. #40-LL1660-4*2A3
  64. Help with stereo tube amp design from parts
  65. Decoupling cap hum
  66. Plate chokes
  67. Tube output protection
  68. 12EN6 in triode mode...fine ???
  69. used 12at7
  70. Need advise with NFB loop
  71. Very basic grid question????
  72. 12AX7 PULSE
  73. short article about operating points
  74. How is an amp's output measured?
  75. current/cathode feedback
  76. 6N23P, transistor PP hybrid amp project.
  77. Transformer choice for DC heater supply?
  78. Help me with i177 tubetester
  79. HeathKit Euw-15 Tube power Supply failure.
  80. Got unknown tube preamp board, need help!
  81. Ergo-Ella + Budget AVC Do-It-Box
  82. Phono pre amp question.
  83. Zener regulation for fixed-bias supply
  84. hot transformer
  85. H. H. Scott 299C output transformers
  86. decisions fostex and the DIY-K12G budget system..
  87. LTSpice GU19 GU29 6R3S
  88. power transfo as HT choke
  89. Dummy newb needs help with Bogen VP17X
  90. Modding the SAKUA AV200
  91. Anybody use 841s(VT-51)?
  92. Help me make use of these transformers
  93. Wiring Buck Transformer with GE transformer Help!
  94. audio research sp9
  95. WE417A Valve Preamplifier
  96. Hi-Fi Tube Amplifier and more
  97. Radford SC-22 Restoration - Input Transistor Biasing Question
  98. 805 MonoBlock SE Amp Kit?
  99. Back to back toroids
  100. 6AU6 in CCS circuits
  101. Morgan Jones' RIAA Pre-Amp
  102. Pre-amp using Hammond 372FX (300-0-300, 5, 6,3) - suggestions?
  103. Building an Aikido LV for a headphone amp
  104. What to do with a 6L6-GC?
  105. loose plate caps, hi temp glue???
  106. Power supply question
  107. RCA Line Input Shielding Technique Help
  108. Grommes 260A DIY report, questions, suggestions
  109. Minimum Gain Stage Rg Value?
  110. One-half 6H30
  111. Novice In Over His Head
  112. Twisted Heater Wires
  113. Little Dot MK III - noisy / oscillation?
  114. Rundmaus at work - PP1C without sand
  115. where to start? 2 channel SS/tube bass preamp
  116. mr liang 845
  117. RH84 (EL84) Choke etc...
  118. Gyrator Loaded 12b4A: The Latest Version.
  119. Wood Trimmed Chassis
  120. Sansui BA-303
  121. Stepped Attenuator - Ebay Seiden DACT Goldpoint Elma Shallco?
  122. hybrid amp with dht or idht inputs?
  123. Balanced to Unbalanced Line Conversion
  124. Headphone amplifier with TH100 tube
  125. Happy New Year - A New Amp to Argue About...
  126. fee-nix, the desktop amp
  127. Any thoughts on what damage I did?
  128. So. Cal. Ham Festival?
  129. zener LTSpice model
  130. Mini-console Schematic
  131. Will this circuit work Ok?
  132. tube CCS below cathodes, startup issues?
  133. Why the wimpy 300B operating points?
  134. Bench supply ideas
  135. A Newbie Tx Question
  136. Volume Control Help!
  137. Could anyone opine on this circuit?
  138. 5U4 Rectifier. Maximum filter cap value?
  139. Grounding outputs?
  140. Happy holidays folks.
  141. Thermionic diode
  142. Lafayette amp arcing Rectifier problem
  143. ECF801 any good for audio
  144. Harman Kardon Citation II PI question
  145. 6N1P
  146. Shorted secondary windings of transformer
  147. Toasted my rectifier - need some pointers to troubleshoot
  148. Parallel amp connection to speakers, SS + tube
  149. Loose pin on a JJ 300B
  150. Measuring milliamp with Fluke 771 Clamp Meter Question?
  151. Spice - and Sting is nowhere to be seen...
  152. Realistic Stereo 24
  153. 6N3P-EV measured Ia/Va/Vg curves
  154. Anyone have the Meng Mini X1 amp here?
  155. EL84/6SN7 tube amp
  156. Something Like A 6EU7?
  157. Which 845 amp?
  158. another 12ax7 preamp
  159. SOHA v2 cost
  160. Yarland FV34C-111 Valve substitution
  161. My Latest DIY Draft (Beta) Build - Resurrected Sansui AU-111
  162. XiangSheng D-2020-KT88
  163. Edcor vs Electra-Print
  164. adding headphone jack to dynaco pas 3 clone
  165. Revising an old tube preamp section: where to get the knowledge?
  166. 6CG7 Bias Current?
  167. Output Pentode Screen at half Plate voltage
  168. PP to parallel
  169. Edcor vs Electra-Print
  170. Show off your P2P wiring.
  171. adapting 2 SE boards for a PP driver stage
  172. Freed transformer info needed
  173. Recomended connectors?
  174. COSMOS amp, Japan
  175. Advantage to constant current draw from power supply?
  176. SP9 schematic questions...
  177. Would you rebuild this?
  178. possible advantage to global???
  179. Correct Path: Diodes Or Rectifier Tube?
  180. 6BQ5 Bias Point Help
  181. Old Hammond 1640SE OPT
  182. Copland CVA 306 Can work only with 2 tubes ??
  183. Cleaning Edison Price posts
  184. need help on treble distortion with my EAR834p phono
  185. SE 6CB5A amp with 6N7 driver
  186. McAlister PP150
  187. Standard Input Design Value
  188. Breadboard help
  189. Odd amp built with PL81 / PL36
  190. Has anyone built a 47 SE amp?
  191. Which EL84
  192. First attempt p2p valve power amp
  193. Fundamental Pentode Question
  194. EL34 Triode Mode Resistors
  195. 807 SE Schematic Critiques
  196. Amp for Magneplanar 1.6
  197. After Christmas free time
  198. I suppose I am a little dense
  199. 12AU7 SE practise amp project
  200. LED bias with gNFB
  201. Schematic question - what this cap is for ?
  202. Output transformer
  203. 50C5s in PP ?
  204. input resistor on the JE LAB 300B
  205. Sockets for UY 41
  206. Any good tube amp kits for a first attempt?
  207. power supply suggestions and advice
  208. favourite midrange,treble tubes
  209. How can I turn 120VAC to 100VAC for Tango MS-UVD in an 845 SE amp?
  210. suspect a bad tube-any simple checks?
  211. Long-Tailed Pair, pse. share your views...
  212. 12AT7 vs 6SL7 as splitter for 6V6 ppp amp
  213. Ultralinear but no UL taps.
  214. OPT Question
  215. An Important Dumb Question-Newbie Stuff
  216. Switched to LED bias on 6SN7 cathode - how do I calculate current?
  217. Autobias OTL....Any thoughts?
  218. Valve Line Amp suggestions
  219. another 6c33 se
  220. no sound on the PHONO channel....
  221. What do you think of this cheap tube amplifier?
  222. Help! Want to Diy Tube Amp!
  223. Anyone care for some troubleshooting? Hum issue
  224. Re-tubing stock ST70
  225. your opinion of this bias problem
  226. paraphase with follower
  227. Noisy transformer
  228. 6BN11 in triode mode...any experience ?
  229. morgan jones:output stages
  230. Dynaco SCA-35 - fan Cooling?
  231. Partridge Vs Edcor
  232. Feedback with a choke ?
  233. Level matching?
  234. cascoded bjt ccs - design check please
  235. help on amp gain structure
  236. iPod/BlackBerry/MP3 input
  237. Shuguang 805 - Advice
  238. Mains Transformer Hums under load
  239. K12G left channel dead: HELP!
  240. Model 16LS Stereo Integrated Tube Amplifier
  241. Help identifying components
  242. Odd Block Series 1 6L6 Amp Power Supply
  243. Need Help for Improving HEATHKIT AA 151
  244. Troubleshooting help for a neophyte
  245. can cap - rectifier spacing
  246. tube dampers anyone
  247. cnc aluminium chassis for tube amps
  248. Balanced Input as Phase Inverter?
  249. 300B SET amp input sensitivity, Help.
  250. Any thoughts on this circuit?

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