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  1. Preamp pcb
  2. Strange Problem In Tube Amp Build
  3. Output transformer question
  4. Replacing ECL86/6GW8 to PCL86(14GW8)???
  5. On or Off?
  6. Neg-Feedback into Grid of gain stage instead of cathode?
  7. Accuphase F-25 Japanese manual translation help!
  8. Negative supply with CT tranny
  9. E130L SE again
  10. tony builds a 7N7 preamp
  11. Tango 10429 78% Nickle Output Transformer?
  12. Bias for Ipod Input
  13. What about this driver????
  14. allen organ amp 75
  15. Needs help Tubezone Poseidon
  16. Lightbulb trick on filament circuit?
  17. AMC CVT3030a Help for repair
  18. TF110-48/UL in the UK?
  19. hum in pas2
  20. Aikido Cathode Follwer Question
  21. Question Regarding a Partial Feedback 807 SE
  22. Leftover transformers
  23. Newbie "In Search of help"
  24. ELL80/ECLL800 Cathode follower
  25. The "Tube" bookshelf
  26. knight KG-240? low output help
  27. Vacuum tube VCO
  28. JE lab 2a3 , fizzy, squeal in one channel, help
  29. Trouble with a DIY EL34 Tube Amp Kit
  30. SPICE Transformer Model Spreadsheet
  31. Choosing the right triode as a Phase Inverter
  32. toob noob with GE 5670 and I'd like to do something with it. Help?
  33. my first tube amp, no tubes...
  34. Enough heat to power my CD player...
  35. My first tube amp: 6C33C
  36. S5 16LS kit as a first DIY tube build?
  37. lady day we 91 psu mod help
  38. On days like these ...
  39. The Magnetron - A Low Noise, Long Life Amplifier????
  40. 6M11's
  41. DC coupled 300B idea - request for comments
  42. Fisher bias
  43. How does anode voltage swing to twice HT voltage?
  44. Can a 7625 Ceramic Planar Triode be soldered ?
  45. AMI "DD" Project: 6L6
  46. Plate loading questions
  47. EZ81 rectifier
  48. PY500a
  49. Tube Regulator Thoughts?
  50. Fully balanced from cartridge to loudspeaker - a little help needed!
  51. OPT on the speaker side?
  52. tube circuit conversions?
  53. Current inrush limiter suggestions
  54. Repair of Philips EL6416 amplifiers.
  55. GU-19 In priboi
  56. Duncan Amps PSU Designer II
  57. using existing pre with this circuit
  58. Antek AT-070L Specs
  59. Unused tube sections
  60. Rewire Rectifier Sockets for Tube Substitution
  61. Shuguang 300BC
  62. Sn/Pb S-Sn/Cu ...
  63. What and Where is BAF?
  64. CCS plate follower 12bh7 schematic needed pls
  65. 300B DC heaters confusion
  66. Blue Tube Red Plating = Help!
  67. Tube bass preamplifier power supply (Need Help)
  68. Opera Consonance M500 mkii
  69. 6AC7EH Better but different
  70. For that hard to find 5HY 2 amp choke...
  71. Cleaning up an old ST-70 chassis
  72. Accuphase P250 Amplifier Schematic Requred
  73. Pls Help me, this 6C33C pp Schematic is OK?
  74. Loud Noise due to NFB
  75. NAMM Zoo 2011
  76. Damage to valve amp when powered up but disconnected to speakers?
  77. use more then 'maximum capacitance' after tube rectifier
  78. Headphone Tube Amp D3a
  79. Dared 5.1 tube amp
  80. Designing Transformers with J.C.Maxwell
  81. Cathode resistor calc?
  82. good circuit to use with Grounded Grid Pre
  83. JJ KT88 tubes glowing bright yellow.
  84. Transistorised-Tubed-Magnetic Amplifier
  85. ST-35 Tube Brands
  86. Where you buy iron transformer core for DIY audio transformer
  87. Improve this SP-11 HV supply?
  88. More Antek Iron
  89. Edcor Transformer Specs
  90. Volume control resistance question? Step Attenuator?
  91. Minimum space between 6V6 tube in Push-Pull Amp
  92. GE Jan 6550a for SET amp?
  93. Chassis mount connector strip
  94. Transformer winding - mysterious!
  95. can anyone identify theses OT markings?
  96. Excessive hum with 1960's amp.
  97. Western Electric/Hickock 600A
  98. Pete Millett Uniamp
  99. cathode resistor sudden rising value on 7591
  100. 7591 cathode resistor unstable
  101. David
  102. Looking for a DHT Pre & Phono design / ideas please
  103. Hi, New member just bought k272a kit from Oatley
  104. Building an amp from scratch - what features would i want
  105. Lafayette LA215 voltage problem !
  106. 12ax7: How to maximize output?
  107. Low voltage tube pre-amp for T-amp
  108. Hybrid bipolar amp
  109. Single end amp power supply upgrade
  110. Pentode curves - how to find operating point withoud going crazy?
  111. 6922 into 6H30 socket ?
  112. Headwize 6N1P OTL headphone amp having hum
  113. Need help to calculate R in a CCS!
  114. #40-LL1660-4*2A3
  115. Help with stereo tube amp design from parts
  116. Decoupling cap hum
  117. Plate chokes
  118. Tube output protection
  119. 12EN6 in triode mode...fine ???
  120. used 12at7
  121. Need advise with NFB loop
  122. Very basic grid question????
  123. 12AX7 PULSE
  124. short article about operating points
  125. How is an amp's output measured?
  126. current/cathode feedback
  127. 6N23P, transistor PP hybrid amp project.
  128. Transformer choice for DC heater supply?
  129. Help me with i177 tubetester
  130. HeathKit Euw-15 Tube power Supply failure.
  131. Got unknown tube preamp board, need help!
  132. Ergo-Ella + Budget AVC Do-It-Box
  133. Phono pre amp question.
  134. Zener regulation for fixed-bias supply
  135. hot transformer
  136. H. H. Scott 299C output transformers
  137. decisions fostex and the DIY-K12G budget system..
  138. LTSpice GU19 GU29 6R3S
  139. power transfo as HT choke
  140. Dummy newb needs help with Bogen VP17X
  141. Modding the SAKUA AV200
  142. Anybody use 841s(VT-51)?
  143. Help me make use of these transformers
  144. Wiring Buck Transformer with GE transformer Help!
  145. audio research sp9
  146. WE417A Valve Preamplifier
  147. Hi-Fi Tube Amplifier and more
  148. Radford SC-22 Restoration - Input Transistor Biasing Question
  149. 805 MonoBlock SE Amp Kit?
  150. Back to back toroids
  151. 6AU6 in CCS circuits
  152. Morgan Jones' RIAA Pre-Amp
  153. Pre-amp using Hammond 372FX (300-0-300, 5, 6,3) - suggestions?
  154. Building an Aikido LV for a headphone amp
  155. What to do with a 6L6-GC?
  156. loose plate caps, hi temp glue???
  157. Power supply question
  158. RCA Line Input Shielding Technique Help
  159. Grommes 260A DIY report, questions, suggestions
  160. Minimum Gain Stage Rg Value?
  161. One-half 6H30
  162. Novice In Over His Head
  163. Twisted Heater Wires
  164. Little Dot MK III - noisy / oscillation?
  165. Rundmaus at work - PP1C without sand
  166. where to start? 2 channel SS/tube bass preamp
  167. mr liang 845
  168. RH84 (EL84) Choke etc...
  169. Gyrator Loaded 12b4A: The Latest Version.
  170. Wood Trimmed Chassis
  171. Sansui BA-303
  172. Stepped Attenuator - Ebay Seiden DACT Goldpoint Elma Shallco?
  173. hybrid amp with dht or idht inputs?
  174. Balanced to Unbalanced Line Conversion
  175. Headphone amplifier with TH100 tube
  176. Happy New Year - A New Amp to Argue About...
  177. fee-nix, the desktop amp
  178. Any thoughts on what damage I did?
  179. So. Cal. Ham Festival?
  180. zener LTSpice model
  181. Mini-console Schematic
  182. Will this circuit work Ok?
  183. tube CCS below cathodes, startup issues?
  184. Why the wimpy 300B operating points?
  185. Bench supply ideas
  186. A Newbie Tx Question
  187. Volume Control Help!
  188. Could anyone opine on this circuit?
  189. 5U4 Rectifier. Maximum filter cap value?
  190. Grounding outputs?
  191. Happy holidays folks.
  192. Thermionic diode
  193. Lafayette amp arcing Rectifier problem
  194. ECF801 any good for audio
  195. Harman Kardon Citation II PI question
  196. 6N1P
  197. Shorted secondary windings of transformer
  198. Toasted my rectifier - need some pointers to troubleshoot
  199. Parallel amp connection to speakers, SS + tube
  200. Loose pin on a JJ 300B
  201. Measuring milliamp with Fluke 771 Clamp Meter Question?
  202. Spice - and Sting is nowhere to be seen...
  203. Realistic Stereo 24
  204. 6N3P-EV measured Ia/Va/Vg curves
  205. Anyone have the Meng Mini X1 amp here?
  206. EL84/6SN7 tube amp
  207. Something Like A 6EU7?
  208. Which 845 amp?
  209. another 12ax7 preamp
  210. SOHA v2 cost
  211. Yarland FV34C-111 Valve substitution
  212. My Latest DIY Draft (Beta) Build - Resurrected Sansui AU-111
  213. XiangSheng D-2020-KT88
  214. Edcor vs Electra-Print
  215. adding headphone jack to dynaco pas 3 clone
  216. Revising an old tube preamp section: where to get the knowledge?
  217. 6CG7 Bias Current?
  218. Output Pentode Screen at half Plate voltage
  219. PP to parallel
  220. Edcor vs Electra-Print
  221. Show off your P2P wiring.
  222. adapting 2 SE boards for a PP driver stage
  223. Freed transformer info needed
  224. Recomended connectors?
  225. COSMOS amp, Japan
  226. Advantage to constant current draw from power supply?
  227. SP9 schematic questions...
  228. Would you rebuild this?
  229. possible advantage to global???
  230. Correct Path: Diodes Or Rectifier Tube?
  231. 6BQ5 Bias Point Help
  232. Old Hammond 1640SE OPT
  233. Copland CVA 306 Can work only with 2 tubes ??
  234. Cleaning Edison Price posts
  235. need help on treble distortion with my EAR834p phono
  236. SE 6CB5A amp with 6N7 driver
  237. McAlister PP150
  238. Standard Input Design Value
  239. Breadboard help
  240. Odd amp built with PL81 / PL36
  241. Has anyone built a 47 SE amp?
  242. Which EL84
  243. First attempt p2p valve power amp
  244. Fundamental Pentode Question
  245. EL34 Triode Mode Resistors
  246. 807 SE Schematic Critiques
  247. Amp for Magneplanar 1.6
  248. After Christmas free time
  249. I suppose I am a little dense
  250. 12AU7 SE practise amp project

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