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  1. ELL80/ECLL800 Cathode follower
  2. The "Tube" bookshelf
  3. knight KG-240? low output help
  4. Reverb trouble-Schematic reading help needed
  5. Vacuum tube VCO
  6. JE lab 2a3 , fizzy, squeal in one channel, help
  7. Trouble with a DIY EL34 Tube Amp Kit
  8. SPICE Transformer Model Spreadsheet
  9. Choosing the right triode as a Phase Inverter
  10. toob noob with GE 5670 and I'd like to do something with it. Help?
  11. my first tube amp, no tubes...
  12. Enough heat to power my CD player...
  13. My first tube amp: 6C33C
  14. S5 16LS kit as a first DIY tube build?
  15. lady day we 91 psu mod help
  16. On days like these ...
  17. The Magnetron - A Low Noise, Long Life Amplifier????
  18. 6M11's
  19. DC coupled 300B idea - request for comments
  20. Fisher bias
  21. How does anode voltage swing to twice HT voltage?
  22. Can a 7625 Ceramic Planar Triode be soldered ?
  23. AMI "DD" Project: 6L6
  24. Plate loading questions
  25. EZ81 rectifier
  26. PY500a
  27. Tube Regulator Thoughts?
  28. Fully balanced from cartridge to loudspeaker - a little help needed!
  29. OPT on the speaker side?
  30. tube circuit conversions?
  31. Current inrush limiter suggestions
  32. Repair of Philips EL6416 amplifiers.
  33. GU-19 In priboi
  34. Duncan Amps PSU Designer II
  35. Troubleshoot help for vibrato type problem
  36. using existing pre with this circuit
  37. Laney Tube Fusion 200 series 2 footswitch
  38. Antek AT-070L Specs
  39. Unused tube sections
  40. Rewire Rectifier Sockets for Tube Substitution
  41. Shuguang 300BC
  42. Sn/Pb S-Sn/Cu ...
  43. What and Where is BAF?
  44. CCS plate follower 12bh7 schematic needed pls
  45. 300B DC heaters confusion
  46. Blue Tube Red Plating = Help!
  47. Tube bass preamplifier power supply (Need Help)
  48. Opera Consonance M500 mkii
  49. 6AC7EH Better but different
  50. For that hard to find 5HY 2 amp choke...
  51. Cleaning up an old ST-70 chassis
  52. Accuphase P250 Amplifier Schematic Requred
  53. Pls Help me, this 6C33C pp Schematic is OK?
  54. Loud Noise due to NFB
  55. NAMM Zoo 2011
  56. Recommended O'Scope Reading?
  57. Damage to valve amp when powered up but disconnected to speakers?
  58. preferred resistor type
  59. use more then 'maximum capacitance' after tube rectifier
  60. Headphone Tube Amp D3a
  61. Dared 5.1 tube amp
  62. Designing Transformers with J.C.Maxwell
  63. Cathode resistor calc?
  64. Selector switch question
  65. good circuit to use with Grounded Grid Pre
  66. JJ KT88 tubes glowing bright yellow.
  67. Transistorised-Tubed-Magnetic Amplifier
  68. ST-35 Tube Brands
  69. Where you buy iron transformer core for DIY audio transformer
  70. Improve this SP-11 HV supply?
  71. More Antek Iron
  72. Edcor Transformer Specs
  73. Volume control resistance question? Step Attenuator?
  74. Minimum space between 6V6 tube in Push-Pull Amp
  75. GE Jan 6550a for SET amp?
  76. Chassis mount connector strip
  77. Transformer winding - mysterious!
  78. can anyone identify theses OT markings?
  79. Excessive hum with 1960's amp.
  80. Western Electric/Hickock 600A
  81. Pete Millett Uniamp
  82. cathode resistor sudden rising value on 7591
  83. 7591 cathode resistor unstable
  84. David
  85. Looking for a DHT Pre & Phono design / ideas please
  86. Hi, New member just bought k272a kit from Oatley
  87. Building an amp from scratch - what features would i want
  88. Lafayette LA215 voltage problem !
  89. 12ax7: How to maximize output?
  90. Low voltage tube pre-amp for T-amp
  91. Hybride bipolair amp
  92. Single end amp power supply upgrade
  93. Pentode curves - how to find operating point withoud going crazy?
  94. 6922 into 6H30 socket ?
  95. Headwize 6N1P OTL headphone amp having hum
  96. Need help to calculate R in a CCS!
  97. #40-LL1660-4*2A3
  98. Help with stereo tube amp design from parts
  99. Decoupling cap hum
  100. Plate chokes
  101. Tube output protection
  102. 12EN6 in triode mode...fine ???
  103. used 12at7
  104. Need advise with NFB loop
  105. 1964 Amplifier!!
  106. Very basic grid question????
  107. 12AX7 PULSE
  108. short article about operating points
  109. How is an amp's output measured?
  110. current/cathode feedback
  111. 6N23P, transistor PP hybrid amp project.
  112. Transformer choice for DC heater supply?
  113. Help me with i177 tubetester
  114. HeathKit Euw-15 Tube power Supply failure.
  115. Got unknown tube preamp board, need help!
  116. Ergo-Ella + Budget AVC Do-It-Box
  117. Phono pre amp question.
  118. Zener regulation for fixed-bias supply
  119. hot transformer
  120. H. H. Scott 299C output transformers
  121. decisions fostex and the DIY-K12G budget system..
  122. LTSpice GU19 GU29 6R3S
  123. power transfo as HT choke
  124. Dummy newb needs help with Bogen VP17X
  125. Modding the SAKUA AV200
  126. Anybody use 841s(VT-51)?
  127. Help me make use of these transformers
  128. Wiring Buck Transformer with GE transformer Help!
  129. audio research sp9
  130. WE417A Valve Preamplifier
  131. Hi-Fi Tube Amplifier and more
  132. Radford SC-22 Restoration - Input Transistor Biasing Question
  133. Tube Tester
  134. Looking for off-the-wall oil caps
  135. 805 MonoBlock SE Amp Kit?
  136. Back to back toroids
  137. 6AU6 in CCS circuits
  138. Morgan Jones' RIAA Pre-Amp
  139. Pre-amp using Hammond 372FX (300-0-300, 5, 6,3) - suggestions?
  140. Building an Aikido LV for a headphone amp
  141. What to do with a 6L6-GC?
  142. loose plate caps, hi temp glue???
  143. Power supply question
  144. RCA Line Input Shielding Technique Help
  145. Randall shutting down
  146. Grommes 260A DIY report, questions, suggestions
  147. Line out from tube organ
  148. Minimum Gain Stage Rg Value?
  149. One-half 6H30
  150. Novice In Over His Head
  151. Twisted Heater Wires
  152. Guitar amplifier PSU hum woes
  153. Little Dot MK III - noisy / oscillation?
  154. Rundmaus at work - PP1C without sand
  155. Power transformer for Firefly Amp?
  156. where to start? 2 channel SS/tube bass preamp
  157. mr liang 845
  158. RH84 (EL84) Choke etc...
  159. Gyrator Loaded 12b4A: The Latest Version.
  160. Wood Trimmed Chassis
  161. Sansui BA-303
  162. Stepped Attenuator - Ebay Seiden DACT Goldpoint Elma Shallco?
  163. hybrid amp with dht or idht inputs?
  164. Balanced to Unbalanced Line Conversion
  165. Headphone amplifier with TH100 tube
  166. Happy New Year - A New Amp to Argue About...
  167. fee-nix, the desktop amp
  168. Any thoughts on what damage I did?
  169. So. Cal. Ham Festival?
  170. zener LTSpice model
  171. Mini-console Schematic
  172. Will this circuit work Ok?
  173. tube CCS below cathodes, startup issues?
  174. Why the wimpy 300B operating points?
  175. can a cathode follower drive a tone stack and an effects loop?
  176. Bench supply ideas
  177. A Newbie Tx Question
  178. Volume Control Help!
  179. Could anyone opine on this circuit?
  180. 5U4 Rectifier. Maximum filter cap value?
  181. Grounding outputs?
  182. Happy holidays folks.
  183. Thermionic diode
  184. Lafayette amp arcing Rectifier problem
  185. ECF801 any good for audio
  186. Harman Kardon Citation II PI question
  187. 6N1P
  188. Need advice for a 93 Fender "The Twin"
  189. Shorted secondary windings of transformer
  190. Toasted my rectifier - need some pointers to troubleshoot
  191. Parallel amp connection to speakers, SS + tube
  192. Loose pin on a JJ 300B
  193. Measuring milliamp with Fluke 771 Clamp Meter Question?
  194. Spice - and Sting is nowhere to be seen...
  195. Realistic Stereo 24
  196. 6N3P-EV measured Ia/Va/Vg curves
  197. Anyone have the Meng Mini X1 amp here?
  198. EL84/6SN7 tube amp
  199. Something Like A 6EU7?
  200. Which 845 amp?
  201. another 12ax7 preamp
  202. SOHA v2 cost
  203. Yarland FV34C-111 Valve substitution
  204. My Latest DIY Draft (Beta) Build - Resurrected Sansui AU-111
  205. XiangSheng D-2020-KT88
  206. Edcor vs Electra-Print
  207. adding headphone jack to dynaco pas 3 clone
  208. Revising an old tube preamp section: where to get the knowledge?
  209. 3 Caps parallel to series vs ??? Sonic Performance?
  210. 6CG7 Bias Current?
  211. Output Pentode Screen at half Plate voltage
  212. PP to parallel
  213. Edcor vs Electra-Print
  214. Show off your P2P wiring.
  215. adapting 2 SE boards for a PP driver stage
  216. Freed transformer info needed
  217. Recomended connectors?
  218. COSMOS amp, Japan
  219. Advantage to constant current draw from power supply?
  220. SP9 schematic questions...
  221. Would you rebuild this?
  222. possible advantage to global???
  223. Correct Path: Diodes Or Rectifier Tube?
  224. 6BQ5 Bias Point Help
  225. Old Hammond 1640SE OPT
  226. Copland CVA 306 Can work only with 2 tubes ??
  227. Cleaning Edison Price posts
  228. need help on treble distortion with my EAR834p phono
  229. SE 6CB5A amp with 6N7 driver
  230. McAlister PP150
  231. Standard Input Design Value
  232. Breadboard help
  233. Odd amp built with PL81 / PL36
  234. Has anyone built a 47 SE amp?
  235. Which EL84
  236. First attempt p2p valve power amp
  237. Fundamental Pentode Question
  238. EL34 Triode Mode Resistors
  239. 807 SE Schematic Critiques
  240. Amp for Magneplanar 1.6
  241. After Christmas free time
  242. Tubelab Single Ended Amps
  243. I suppose I am a little dense
  244. 12AU7 SE practise amp project
  245. LED bias with gNFB
  246. Schematic question - what this cap is for ?
  247. Hi fi stereo tube amp through guitar speakers??
  248. Output transformer
  249. 50C5s in PP ?
  250. input resistor on the JE LAB 300B

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