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  1. Loud Noise due to NFB
  2. NAMM Zoo 2011
  3. Damage to valve amp when powered up but disconnected to speakers?
  4. use more then 'maximum capacitance' after tube rectifier
  5. Headphone Tube Amp D3a
  6. Dared 5.1 tube amp
  7. Designing Transformers with J.C.Maxwell
  8. Cathode resistor calc?
  9. good circuit to use with Grounded Grid Pre
  10. JJ KT88 tubes glowing bright yellow.
  11. Transistorised-Tubed-Magnetic Amplifier
  12. ST-35 Tube Brands
  13. Where you buy iron transformer core for DIY audio transformer
  14. Improve this SP-11 HV supply?
  15. More Antek Iron
  16. Edcor Transformer Specs
  17. Volume control resistance question? Step Attenuator?
  18. Minimum space between 6V6 tube in Push-Pull Amp
  19. GE Jan 6550a for SET amp?
  20. Chassis mount connector strip
  21. Transformer winding - mysterious!
  22. can anyone identify theses OT markings?
  23. Excessive hum with 1960's amp.
  24. Western Electric/Hickock 600A
  25. Pete Millett Uniamp
  26. cathode resistor sudden rising value on 7591
  27. 7591 cathode resistor unstable
  28. David
  29. Looking for a DHT Pre & Phono design / ideas please
  30. Hi, New member just bought k272a kit from Oatley
  31. Building an amp from scratch - what features would i want
  32. Lafayette LA215 voltage problem !
  33. 12ax7: How to maximize output?
  34. Low voltage tube pre-amp for T-amp
  35. Hybride bipolair amp
  36. Single end amp power supply upgrade
  37. Pentode curves - how to find operating point withoud going crazy?
  38. 6922 into 6H30 socket ?
  39. Headwize 6N1P OTL headphone amp having hum
  40. Need help to calculate R in a CCS!
  41. #40-LL1660-4*2A3
  42. Help with stereo tube amp design from parts
  43. Decoupling cap hum
  44. Plate chokes
  45. Tube output protection
  46. 12EN6 in triode mode...fine ???
  47. used 12at7
  48. Need advise with NFB loop
  49. Very basic grid question????
  50. 12AX7 PULSE
  51. short article about operating points
  52. How is an amp's output measured?
  53. current/cathode feedback
  54. 6N23P, transistor PP hybrid amp project.
  55. Transformer choice for DC heater supply?
  56. Help me with i177 tubetester
  57. HeathKit Euw-15 Tube power Supply failure.
  58. Got unknown tube preamp board, need help!
  59. Ergo-Ella + Budget AVC Do-It-Box
  60. Phono pre amp question.
  61. Zener regulation for fixed-bias supply
  62. hot transformer
  63. H. H. Scott 299C output transformers
  64. decisions fostex and the DIY-K12G budget system..
  65. LTSpice GU19 GU29 6R3S
  66. power transfo as HT choke
  67. Dummy newb needs help with Bogen VP17X
  68. Modding the SAKUA AV200
  69. Anybody use 841s(VT-51)?
  70. Help me make use of these transformers
  71. Wiring Buck Transformer with GE transformer Help!
  72. audio research sp9
  73. WE417A Valve Preamplifier
  74. Hi-Fi Tube Amplifier and more
  75. Radford SC-22 Restoration - Input Transistor Biasing Question
  76. Tube Tester
  77. 805 MonoBlock SE Amp Kit?
  78. Back to back toroids
  79. 6AU6 in CCS circuits
  80. Morgan Jones' RIAA Pre-Amp
  81. Pre-amp using Hammond 372FX (300-0-300, 5, 6,3) - suggestions?
  82. Building an Aikido LV for a headphone amp
  83. What to do with a 6L6-GC?
  84. loose plate caps, hi temp glue???
  85. Power supply question
  86. RCA Line Input Shielding Technique Help
  87. Grommes 260A DIY report, questions, suggestions
  88. Line out from tube organ
  89. Minimum Gain Stage Rg Value?
  90. One-half 6H30
  91. Novice In Over His Head
  92. Twisted Heater Wires
  93. Little Dot MK III - noisy / oscillation?
  94. Rundmaus at work - PP1C without sand
  95. Power transformer for Firefly Amp?
  96. where to start? 2 channel SS/tube bass preamp
  97. mr liang 845
  98. RH84 (EL84) Choke etc...
  99. Gyrator Loaded 12b4A: The Latest Version.
  100. Wood Trimmed Chassis
  101. Sansui BA-303
  102. Stepped Attenuator - Ebay Seiden DACT Goldpoint Elma Shallco?
  103. hybrid amp with dht or idht inputs?
  104. Balanced to Unbalanced Line Conversion
  105. Headphone amplifier with TH100 tube
  106. Happy New Year - A New Amp to Argue About...
  107. fee-nix, the desktop amp
  108. Any thoughts on what damage I did?
  109. So. Cal. Ham Festival?
  110. zener LTSpice model
  111. Mini-console Schematic
  112. Will this circuit work Ok?
  113. tube CCS below cathodes, startup issues?
  114. Why the wimpy 300B operating points?
  115. Bench supply ideas
  116. A Newbie Tx Question
  117. Volume Control Help!
  118. Could anyone opine on this circuit?
  119. 5U4 Rectifier. Maximum filter cap value?
  120. Grounding outputs?
  121. Happy holidays folks.
  122. Thermionic diode
  123. Lafayette amp arcing Rectifier problem
  124. ECF801 any good for audio
  125. Harman Kardon Citation II PI question
  126. 6N1P
  127. Shorted secondary windings of transformer
  128. Toasted my rectifier - need some pointers to troubleshoot
  129. Parallel amp connection to speakers, SS + tube
  130. Loose pin on a JJ 300B
  131. Measuring milliamp with Fluke 771 Clamp Meter Question?
  132. Spice - and Sting is nowhere to be seen...
  133. Realistic Stereo 24
  134. 6N3P-EV measured Ia/Va/Vg curves
  135. Anyone have the Meng Mini X1 amp here?
  136. EL84/6SN7 tube amp
  137. Something Like A 6EU7?
  138. Which 845 amp?
  139. another 12ax7 preamp
  140. SOHA v2 cost
  141. Yarland FV34C-111 Valve substitution
  142. My Latest DIY Draft (Beta) Build - Resurrected Sansui AU-111
  143. XiangSheng D-2020-KT88
  144. Edcor vs Electra-Print
  145. adding headphone jack to dynaco pas 3 clone
  146. Revising an old tube preamp section: where to get the knowledge?
  147. 6CG7 Bias Current?
  148. Output Pentode Screen at half Plate voltage
  149. PP to parallel
  150. Edcor vs Electra-Print
  151. Show off your P2P wiring.
  152. adapting 2 SE boards for a PP driver stage
  153. Freed transformer info needed
  154. Recomended connectors?
  155. COSMOS amp, Japan
  156. Advantage to constant current draw from power supply?
  157. SP9 schematic questions...
  158. Would you rebuild this?
  159. possible advantage to global???
  160. Correct Path: Diodes Or Rectifier Tube?
  161. 6BQ5 Bias Point Help
  162. Old Hammond 1640SE OPT
  163. Copland CVA 306 Can work only with 2 tubes ??
  164. Cleaning Edison Price posts
  165. need help on treble distortion with my EAR834p phono
  166. SE 6CB5A amp with 6N7 driver
  167. McAlister PP150
  168. Standard Input Design Value
  169. Breadboard help
  170. Odd amp built with PL81 / PL36
  171. Has anyone built a 47 SE amp?
  172. Which EL84
  173. First attempt p2p valve power amp
  174. Fundamental Pentode Question
  175. EL34 Triode Mode Resistors
  176. 807 SE Schematic Critiques
  177. Amp for Magneplanar 1.6
  178. After Christmas free time
  179. Tubelab Single Ended Amps
  180. I suppose I am a little dense
  181. 12AU7 SE practise amp project
  182. LED bias with gNFB
  183. Schematic question - what this cap is for ?
  184. Output transformer
  185. 50C5s in PP ?
  186. input resistor on the JE LAB 300B
  187. Sockets for UY 41
  188. Any good tube amp kits for a first attempt?
  189. power supply suggestions and advice
  190. favourite midrange,treble tubes
  191. How can I turn 120VAC to 100VAC for Tango MS-UVD in an 845 SE amp?
  192. suspect a bad tube-any simple checks?
  193. Long-Tailed Pair, pse. share your views...
  194. 12AT7 vs 6SL7 as splitter for 6V6 ppp amp
  195. Ultralinear but no UL taps.
  196. OPT Question
  197. An Important Dumb Question-Newbie Stuff
  198. Switched to LED bias on 6SN7 cathode - how do I calculate current?
  199. Autobias OTL....Any thoughts?
  200. Valve Line Amp suggestions
  201. another 6c33 se
  202. no sound on the PHONO channel....
  203. What do you think of this cheap tube amplifier?
  204. EL34 Hickok 439B setup
  205. Hickok 605
  206. Help! Want to Diy Tube Amp!
  207. Anyone care for some troubleshooting? Hum issue
  208. Re-tubing stock ST70
  209. your opinion of this bias problem
  210. paraphase with follower
  211. Noisy transformer
  212. 6BN11 in triode mode...any experience ?
  213. morgan jones:output stages
  214. Dynaco SCA-35 - fan Cooling?
  215. Partridge Vs Edcor
  216. Feedback with a choke ?
  217. Do you have a tube tester?
  218. Level matching?
  219. cascoded bjt ccs - design check please
  220. help on amp gain structure
  221. iPod/BlackBerry/MP3 input
  222. Shuguang 805 - Advice
  223. Mains Transformer Hums under load
  224. K12G left channel dead: HELP!
  225. Model 16LS Stereo Integrated Tube Amplifier
  226. Help identifying components
  227. Odd Block Series 1 6L6 Amp Power Supply
  228. Need Help for Improving HEATHKIT AA 151
  229. Troubleshooting help for a neophyte
  230. can cap - rectifier spacing
  231. tube dampers anyone
  232. cnc aluminium chassis for tube amps
  233. Balanced Input as Phase Inverter?
  234. 300B SET amp input sensitivity, Help.
  235. Any thoughts on this circuit?
  236. Will This Work? 26 Linestage
  237. Eico HF-89a question
  238. 100TH Ep-Ip Curve
  239. Power Transformer - Can you use separate tap for screens?
  240. Power supply for PP1C - sanity check
  241. Blue Velvet preamp
  242. Paid 5$ for this deluxe/vibrolux schematic! some connections missing help!!
  243. Universal Power Transformer
  244. Tone control in a TubelabSE?
  245. 300B Sweet Spot
  246. Does 81ma sound about right?
  247. Frank's EC8010/6C45P-GM70 SE Interstage.
  248. I need a bit of help to fine tune my PP EL84 amp
  249. IS there any OTL pre amps out there?
  250. 6BQ5 Sweet Spot?-Charts for other than 250 Screen Volts?

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