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

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