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  1. Duncan Amps PSU Designer II
  2. using existing pre with this circuit
  3. Antek AT-070L Specs
  4. Unused tube sections
  5. Rewire Rectifier Sockets for Tube Substitution
  6. Shuguang 300BC
  7. Sn/Pb S-Sn/Cu ...
  8. What and Where is BAF?
  9. CCS plate follower 12bh7 schematic needed pls
  10. 300B DC heaters confusion
  11. Blue Tube Red Plating = Help!
  12. Tube bass preamplifier power supply (Need Help)
  13. Opera Consonance M500 mkii
  14. 6AC7EH Better but different
  15. For that hard to find 5HY 2 amp choke...
  16. Cleaning up an old ST-70 chassis
  17. Accuphase P250 Amplifier Schematic Requred
  18. Pls Help me, this 6C33C pp Schematic is OK?
  19. Loud Noise due to NFB
  20. NAMM Zoo 2011
  21. Recommended O'Scope Reading?
  22. Damage to valve amp when powered up but disconnected to speakers?
  23. preferred resistor type
  24. use more then 'maximum capacitance' after tube rectifier
  25. Headphone Tube Amp D3a
  26. Dared 5.1 tube amp
  27. Designing Transformers with J.C.Maxwell
  28. Cathode resistor calc?
  29. Selector switch question
  30. good circuit to use with Grounded Grid Pre
  31. JJ KT88 tubes glowing bright yellow.
  32. Transistorised-Tubed-Magnetic Amplifier
  33. ST-35 Tube Brands
  34. Where you buy iron transformer core for DIY audio transformer
  35. Improve this SP-11 HV supply?
  36. More Antek Iron
  37. Edcor Transformer Specs
  38. Volume control resistance question? Step Attenuator?
  39. Minimum space between 6V6 tube in Push-Pull Amp
  40. GE Jan 6550a for SET amp?
  41. Chassis mount connector strip
  42. Transformer winding - mysterious!
  43. can anyone identify theses OT markings?
  44. Excessive hum with 1960's amp.
  45. Western Electric/Hickock 600A
  46. Pete Millett Uniamp
  47. cathode resistor sudden rising value on 7591
  48. 7591 cathode resistor unstable
  49. David
  50. Looking for a DHT Pre & Phono design / ideas please
  51. Hi, New member just bought k272a kit from Oatley
  52. Building an amp from scratch - what features would i want
  53. Lafayette LA215 voltage problem !
  54. 12ax7: How to maximize output?
  55. Low voltage tube pre-amp for T-amp
  56. Hybride bipolair amp
  57. Single end amp power supply upgrade
  58. Pentode curves - how to find operating point withoud going crazy?
  59. 6922 into 6H30 socket ?
  60. Headwize 6N1P OTL headphone amp having hum
  61. Need help to calculate R in a CCS!
  62. #40-LL1660-4*2A3
  63. Help with stereo tube amp design from parts
  64. Decoupling cap hum
  65. Plate chokes
  66. Tube output protection
  67. 12EN6 in triode mode...fine ???
  68. used 12at7
  69. Need advise with NFB loop
  70. Very basic grid question????
  71. 12AX7 PULSE
  72. short article about operating points
  73. How is an amp's output measured?
  74. current/cathode feedback
  75. 6N23P, transistor PP hybrid amp project.
  76. Transformer choice for DC heater supply?
  77. Help me with i177 tubetester
  78. HeathKit Euw-15 Tube power Supply failure.
  79. Got unknown tube preamp board, need help!
  80. Ergo-Ella + Budget AVC Do-It-Box
  81. Phono pre amp question.
  82. Zener regulation for fixed-bias supply
  83. hot transformer
  84. H. H. Scott 299C output transformers
  85. decisions fostex and the DIY-K12G budget system..
  86. LTSpice GU19 GU29 6R3S
  87. power transfo as HT choke
  88. Dummy newb needs help with Bogen VP17X
  89. Modding the SAKUA AV200
  90. Anybody use 841s(VT-51)?
  91. Help me make use of these transformers
  92. Wiring Buck Transformer with GE transformer Help!
  93. audio research sp9
  94. WE417A Valve Preamplifier
  95. Hi-Fi Tube Amplifier and more
  96. Radford SC-22 Restoration - Input Transistor Biasing Question
  97. Tube Tester
  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. Line out from tube organ
  110. Minimum Gain Stage Rg Value?
  111. One-half 6H30
  112. Novice In Over His Head
  113. Twisted Heater Wires
  114. Little Dot MK III - noisy / oscillation?
  115. Rundmaus at work - PP1C without sand
  116. Power transformer for Firefly Amp?
  117. where to start? 2 channel SS/tube bass preamp
  118. mr liang 845
  119. RH84 (EL84) Choke etc...
  120. Gyrator Loaded 12b4A: The Latest Version.
  121. Wood Trimmed Chassis
  122. Sansui BA-303
  123. Stepped Attenuator - Ebay Seiden DACT Goldpoint Elma Shallco?
  124. hybrid amp with dht or idht inputs?
  125. Balanced to Unbalanced Line Conversion
  126. Headphone amplifier with TH100 tube
  127. Happy New Year - A New Amp to Argue About...
  128. fee-nix, the desktop amp
  129. Any thoughts on what damage I did?
  130. So. Cal. Ham Festival?
  131. zener LTSpice model
  132. Mini-console Schematic
  133. Will this circuit work Ok?
  134. tube CCS below cathodes, startup issues?
  135. Why the wimpy 300B operating points?
  136. Bench supply ideas
  137. A Newbie Tx Question
  138. Volume Control Help!
  139. Could anyone opine on this circuit?
  140. 5U4 Rectifier. Maximum filter cap value?
  141. Grounding outputs?
  142. Happy holidays folks.
  143. Thermionic diode
  144. Lafayette amp arcing Rectifier problem
  145. ECF801 any good for audio
  146. Harman Kardon Citation II PI question
  147. 6N1P
  148. Shorted secondary windings of transformer
  149. Toasted my rectifier - need some pointers to troubleshoot
  150. Parallel amp connection to speakers, SS + tube
  151. Loose pin on a JJ 300B
  152. Measuring milliamp with Fluke 771 Clamp Meter Question?
  153. Spice - and Sting is nowhere to be seen...
  154. Realistic Stereo 24
  155. 6N3P-EV measured Ia/Va/Vg curves
  156. Anyone have the Meng Mini X1 amp here?
  157. EL84/6SN7 tube amp
  158. Something Like A 6EU7?
  159. Which 845 amp?
  160. another 12ax7 preamp
  161. SOHA v2 cost
  162. Yarland FV34C-111 Valve substitution
  163. My Latest DIY Draft (Beta) Build - Resurrected Sansui AU-111
  164. XiangSheng D-2020-KT88
  165. Edcor vs Electra-Print
  166. adding headphone jack to dynaco pas 3 clone
  167. Revising an old tube preamp section: where to get the knowledge?
  168. 3 Caps parallel to series vs ??? Sonic Performance?
  169. 6CG7 Bias Current?
  170. Output Pentode Screen at half Plate voltage
  171. PP to parallel
  172. Edcor vs Electra-Print
  173. Show off your P2P wiring.
  174. adapting 2 SE boards for a PP driver stage
  175. Freed transformer info needed
  176. Recomended connectors?
  177. COSMOS amp, Japan
  178. Advantage to constant current draw from power supply?
  179. SP9 schematic questions...
  180. Would you rebuild this?
  181. possible advantage to global???
  182. Correct Path: Diodes Or Rectifier Tube?
  183. 6BQ5 Bias Point Help
  184. Old Hammond 1640SE OPT
  185. Copland CVA 306 Can work only with 2 tubes ??
  186. Cleaning Edison Price posts
  187. need help on treble distortion with my EAR834p phono
  188. SE 6CB5A amp with 6N7 driver
  189. McAlister PP150
  190. Standard Input Design Value
  191. Breadboard help
  192. Odd amp built with PL81 / PL36
  193. Has anyone built a 47 SE amp?
  194. Which EL84
  195. First attempt p2p valve power amp
  196. Fundamental Pentode Question
  197. EL34 Triode Mode Resistors
  198. 807 SE Schematic Critiques
  199. Amp for Magneplanar 1.6
  200. After Christmas free time
  201. Tubelab Single Ended Amps
  202. I suppose I am a little dense
  203. 12AU7 SE practise amp project
  204. LED bias with gNFB
  205. Schematic question - what this cap is for ?
  206. Output transformer
  207. 50C5s in PP ?
  208. input resistor on the JE LAB 300B
  209. Sockets for UY 41
  210. Any good tube amp kits for a first attempt?
  211. power supply suggestions and advice
  212. favourite midrange,treble tubes
  213. How can I turn 120VAC to 100VAC for Tango MS-UVD in an 845 SE amp?
  214. suspect a bad tube-any simple checks?
  215. Long-Tailed Pair, pse. share your views...
  216. 12AT7 vs 6SL7 as splitter for 6V6 ppp amp
  217. Ultralinear but no UL taps.
  218. OPT Question
  219. An Important Dumb Question-Newbie Stuff
  220. Switched to LED bias on 6SN7 cathode - how do I calculate current?
  221. Autobias OTL....Any thoughts?
  222. Valve Line Amp suggestions
  223. another 6c33 se
  224. no sound on the PHONO channel....
  225. What do you think of this cheap tube amplifier?
  226. EL34 Hickok 439B setup
  227. Hickok 605
  228. Help! Want to Diy Tube Amp!
  229. Anyone care for some troubleshooting? Hum issue
  230. Re-tubing stock ST70
  231. your opinion of this bias problem
  232. paraphase with follower
  233. Noisy transformer
  234. 6BN11 in triode mode...any experience ?
  235. morgan jones:output stages
  236. Dynaco SCA-35 - fan Cooling?
  237. Partridge Vs Edcor
  238. Feedback with a choke ?
  239. Do you have a tube tester?
  240. Level matching?
  241. cascoded bjt ccs - design check please
  242. help on amp gain structure
  243. iPod/BlackBerry/MP3 input
  244. Shuguang 805 - Advice
  245. Mains Transformer Hums under load
  246. K12G left channel dead: HELP!
  247. Model 16LS Stereo Integrated Tube Amplifier
  248. Help identifying components
  249. Odd Block Series 1 6L6 Amp Power Supply
  250. Need Help for Improving HEATHKIT AA 151

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