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  1. valve phono pre-amp HELP needed
  2. Preamp pcb
  3. ECL82 pp guitar amp project
  4. Strange Problem In Tube Amp Build
  5. Output transformer question
  6. Replacing ECL86/6GW8 to PCL86(14GW8)???
  7. On or Off?
  8. Neg-Feedback into Grid of gain stage instead of cathode?
  9. Accuphase F-25 Japanese manual translation help!
  10. Negative supply with CT tranny
  11. E130L SE again
  12. tony builds a 7N7 preamp
  13. Tango 10429 78% Nickle Output Transformer?
  14. Bias for Ipod Input
  15. What about this driver????
  16. allen organ amp 75
  17. Needs help Tubezone Poseidon
  18. Lightbulb trick on filament circuit?
  19. AMC CVT3030a Help for repair
  20. TF110-48/UL in the UK?
  21. hum in pas2
  22. Aikido Cathode Follwer Question
  23. 12AX7 tube preamplifier for bass guitar (Need help)
  24. Fuses...what's the deal?
  25. Question Regarding a Partial Feedback 807 SE
  26. Preamp issue on Fender Blues Jr.
  27. Leftover transformers
  28. Newbie "In Search of help"
  29. ELL80/ECLL800 Cathode follower
  30. The "Tube" bookshelf
  31. knight KG-240? low output help
  32. Reverb trouble-Schematic reading help needed
  33. Vacuum tube VCO
  34. JE lab 2a3 , fizzy, squeal in one channel, help
  35. Trouble with a DIY EL34 Tube Amp Kit
  36. SPICE Transformer Model Spreadsheet
  37. Choosing the right triode as a Phase Inverter
  38. toob noob with GE 5670 and I'd like to do something with it. Help?
  39. my first tube amp, no tubes...
  40. Enough heat to power my CD player...
  41. My first tube amp: 6C33C
  42. S5 16LS kit as a first DIY tube build?
  43. lady day we 91 psu mod help
  44. On days like these ...
  45. The Magnetron - A Low Noise, Long Life Amplifier????
  46. 6M11's
  47. DC coupled 300B idea - request for comments
  48. Fisher bias
  49. How does anode voltage swing to twice HT voltage?
  50. Can a 7625 Ceramic Planar Triode be soldered ?
  51. AMI "DD" Project: 6L6
  52. Plate loading questions
  53. EZ81 rectifier
  54. PY500a
  55. Tube Regulator Thoughts?
  56. Fully balanced from cartridge to loudspeaker - a little help needed!
  57. OPT on the speaker side?
  58. tube circuit conversions?
  59. Current inrush limiter suggestions
  60. Repair of Philips EL6416 amplifiers.
  61. GU-19 In priboi
  62. Duncan Amps PSU Designer II
  63. Troubleshoot help for vibrato type problem
  64. using existing pre with this circuit
  65. Laney Tube Fusion 200 series 2 footswitch
  66. Antek AT-070L Specs
  67. Unused tube sections
  68. Rewire Rectifier Sockets for Tube Substitution
  69. Shuguang 300BC
  70. Sn/Pb S-Sn/Cu ...
  71. What and Where is BAF?
  72. CCS plate follower 12bh7 schematic needed pls
  73. 300B DC heaters confusion
  74. Blue Tube Red Plating = Help!
  75. Tube bass preamplifier power supply (Need Help)
  76. Opera Consonance M500 mkii
  77. 6AC7EH Better but different
  78. For that hard to find 5HY 2 amp choke...
  79. Cleaning up an old ST-70 chassis
  80. Accuphase P250 Amplifier Schematic Requred
  81. Pls Help me, this 6C33C pp Schematic is OK?
  82. Loud Noise due to NFB
  83. NAMM Zoo 2011
  84. Recommended O'Scope Reading?
  85. Damage to valve amp when powered up but disconnected to speakers?
  86. preferred resistor type
  87. use more then 'maximum capacitance' after tube rectifier
  88. Headphone Tube Amp D3a
  89. Dared 5.1 tube amp
  90. Designing Transformers with J.C.Maxwell
  91. Cathode resistor calc?
  92. Selector switch question
  93. good circuit to use with Grounded Grid Pre
  94. JJ KT88 tubes glowing bright yellow.
  95. Transistorised-Tubed-Magnetic Amplifier
  96. ST-35 Tube Brands
  97. Where you buy iron transformer core for DIY audio transformer
  98. Improve this SP-11 HV supply?
  99. More Antek Iron
  100. Edcor Transformer Specs
  101. Volume control resistance question? Step Attenuator?
  102. Minimum space between 6V6 tube in Push-Pull Amp
  103. GE Jan 6550a for SET amp?
  104. Chassis mount connector strip
  105. Transformer winding - mysterious!
  106. can anyone identify theses OT markings?
  107. Excessive hum with 1960's amp.
  108. Western Electric/Hickock 600A
  109. Pete Millett Uniamp
  110. cathode resistor sudden rising value on 7591
  111. 7591 cathode resistor unstable
  112. David
  113. Looking for a DHT Pre & Phono design / ideas please
  114. Hi, New member just bought k272a kit from Oatley
  115. Building an amp from scratch - what features would i want
  116. Lafayette LA215 voltage problem !
  117. 12ax7: How to maximize output?
  118. Low voltage tube pre-amp for T-amp
  119. Hybride bipolair amp
  120. Single end amp power supply upgrade
  121. Pentode curves - how to find operating point withoud going crazy?
  122. 6922 into 6H30 socket ?
  123. Headwize 6N1P OTL headphone amp having hum
  124. Need help to calculate R in a CCS!
  125. #40-LL1660-4*2A3
  126. Help with stereo tube amp design from parts
  127. Decoupling cap hum
  128. Plate chokes
  129. Tube output protection
  130. 12EN6 in triode mode...fine ???
  131. used 12at7
  132. Need advise with NFB loop
  133. 1964 Amplifier!!
  134. Very basic grid question????
  135. 12AX7 PULSE
  136. short article about operating points
  137. How is an amp's output measured?
  138. current/cathode feedback
  139. 6N23P, transistor PP hybrid amp project.
  140. Transformer choice for DC heater supply?
  141. Help me with i177 tubetester
  142. HeathKit Euw-15 Tube power Supply failure.
  143. Got unknown tube preamp board, need help!
  144. Ergo-Ella + Budget AVC Do-It-Box
  145. Phono pre amp question.
  146. Zener regulation for fixed-bias supply
  147. hot transformer
  148. H. H. Scott 299C output transformers
  149. decisions fostex and the DIY-K12G budget system..
  150. LTSpice GU19 GU29 6R3S
  151. power transfo as HT choke
  152. Dummy newb needs help with Bogen VP17X
  153. Modding the SAKUA AV200
  154. Anybody use 841s(VT-51)?
  155. Help me make use of these transformers
  156. Wiring Buck Transformer with GE transformer Help!
  157. audio research sp9
  158. WE417A Valve Preamplifier
  159. Hi-Fi Tube Amplifier and more
  160. Radford SC-22 Restoration - Input Transistor Biasing Question
  161. Tube Tester
  162. Looking for off-the-wall oil caps
  163. 805 MonoBlock SE Amp Kit?
  164. Back to back toroids
  165. 6AU6 in CCS circuits
  166. Morgan Jones' RIAA Pre-Amp
  167. Pre-amp using Hammond 372FX (300-0-300, 5, 6,3) - suggestions?
  168. Building an Aikido LV for a headphone amp
  169. What to do with a 6L6-GC?
  170. loose plate caps, hi temp glue???
  171. Power supply question
  172. RCA Line Input Shielding Technique Help
  173. Randall shutting down
  174. Grommes 260A DIY report, questions, suggestions
  175. Line out from tube organ
  176. Minimum Gain Stage Rg Value?
  177. One-half 6H30
  178. Novice In Over His Head
  179. Twisted Heater Wires
  180. Guitar amplifier PSU hum woes
  181. Little Dot MK III - noisy / oscillation?
  182. Rundmaus at work - PP1C without sand
  183. Power transformer for Firefly Amp?
  184. where to start? 2 channel SS/tube bass preamp
  185. mr liang 845
  186. RH84 (EL84) Choke etc...
  187. Gyrator Loaded 12b4A: The Latest Version.
  188. Wood Trimmed Chassis
  189. Sansui BA-303
  190. Stepped Attenuator - Ebay Seiden DACT Goldpoint Elma Shallco?
  191. hybrid amp with dht or idht inputs?
  192. Balanced to Unbalanced Line Conversion
  193. Headphone amplifier with TH100 tube
  194. Happy New Year - A New Amp to Argue About...
  195. fee-nix, the desktop amp
  196. Any thoughts on what damage I did?
  197. So. Cal. Ham Festival?
  198. zener LTSpice model
  199. Mini-console Schematic
  200. Will this circuit work Ok?
  201. tube CCS below cathodes, startup issues?
  202. Why the wimpy 300B operating points?
  203. can a cathode follower drive a tone stack and an effects loop?
  204. Bench supply ideas
  205. A Newbie Tx Question
  206. Volume Control Help!
  207. Could anyone opine on this circuit?
  208. 5U4 Rectifier. Maximum filter cap value?
  209. Grounding outputs?
  210. Happy holidays folks.
  211. Thermionic diode
  212. Lafayette amp arcing Rectifier problem
  213. ECF801 any good for audio
  214. Harman Kardon Citation II PI question
  215. 6N1P
  216. Need advice for a 93 Fender "The Twin"
  217. Shorted secondary windings of transformer
  218. Toasted my rectifier - need some pointers to troubleshoot
  219. Parallel amp connection to speakers, SS + tube
  220. Loose pin on a JJ 300B
  221. Measuring milliamp with Fluke 771 Clamp Meter Question?
  222. Spice - and Sting is nowhere to be seen...
  223. Realistic Stereo 24
  224. 6N3P-EV measured Ia/Va/Vg curves
  225. Anyone have the Meng Mini X1 amp here?
  226. EL84/6SN7 tube amp
  227. Something Like A 6EU7?
  228. Which 845 amp?
  229. another 12ax7 preamp
  230. SOHA v2 cost
  231. Yarland FV34C-111 Valve substitution
  232. My Latest DIY Draft (Beta) Build - Resurrected Sansui AU-111
  233. XiangSheng D-2020-KT88
  234. Edcor vs Electra-Print
  235. adding headphone jack to dynaco pas 3 clone
  236. Revising an old tube preamp section: where to get the knowledge?
  237. 3 Caps parallel to series vs ??? Sonic Performance?
  238. 6CG7 Bias Current?
  239. Output Pentode Screen at half Plate voltage
  240. PP to parallel
  241. Edcor vs Electra-Print
  242. Show off your P2P wiring.
  243. adapting 2 SE boards for a PP driver stage
  244. Freed transformer info needed
  245. Recomended connectors?
  246. COSMOS amp, Japan
  247. Advantage to constant current draw from power supply?
  248. SP9 schematic questions...
  249. Would you rebuild this?
  250. possible advantage to global???

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