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  1. Spice Models for Tubes w Screen Grid by Gurski
  2. Theremin project needs some help!
  3. Transformer abuse or other use
  4. aikido heater voltage
  5. HY51Z datasheet, help !!!
  6. 6L6 amp with unique phase splitter - check my math
  7. Dynaco A451 Output Transformer
  8. my 250 watt tube amp can be a 500 watt tube amp for less than 2 bucks plus tubes
  9. 6AU6 preamp problem
  10. Help identifying a Telefunken(?) tube...
  11. UCC85 and e-pay
  12. Lundahl LL1676 - missing data
  13. valve phono pre-amp HELP needed
  14. Preamp pcb
  15. Strange Problem In Tube Amp Build
  16. Output transformer question
  17. Replacing ECL86/6GW8 to PCL86(14GW8)???
  18. On or Off?
  19. Neg-Feedback into Grid of gain stage instead of cathode?
  20. Accuphase F-25 Japanese manual translation help!
  21. Negative supply with CT tranny
  22. E130L SE again
  23. tony builds a 7N7 preamp
  24. Tango 10429 78% Nickle Output Transformer?
  25. Bias for Ipod Input
  26. What about this driver????
  27. allen organ amp 75
  28. Needs help Tubezone Poseidon
  29. Lightbulb trick on filament circuit?
  30. AMC CVT3030a Help for repair
  31. TF110-48/UL in the UK?
  32. hum in pas2
  33. Aikido Cathode Follwer Question
  34. Question Regarding a Partial Feedback 807 SE
  35. Leftover transformers
  36. Newbie "In Search of help"
  37. ELL80/ECLL800 Cathode follower
  38. The "Tube" bookshelf
  39. knight KG-240? low output help
  40. Vacuum tube VCO
  41. JE lab 2a3 , fizzy, squeal in one channel, help
  42. Trouble with a DIY EL34 Tube Amp Kit
  43. SPICE Transformer Model Spreadsheet
  44. Choosing the right triode as a Phase Inverter
  45. toob noob with GE 5670 and I'd like to do something with it. Help?
  46. my first tube amp, no tubes...
  47. Enough heat to power my CD player...
  48. My first tube amp: 6C33C
  49. S5 16LS kit as a first DIY tube build?
  50. lady day we 91 psu mod help
  51. On days like these ...
  52. The Magnetron - A Low Noise, Long Life Amplifier????
  53. 6M11's
  54. DC coupled 300B idea - request for comments
  55. Fisher bias
  56. How does anode voltage swing to twice HT voltage?
  57. Can a 7625 Ceramic Planar Triode be soldered ?
  58. AMI "DD" Project: 6L6
  59. Plate loading questions
  60. EZ81 rectifier
  61. PY500a
  62. Tube Regulator Thoughts?
  63. Fully balanced from cartridge to loudspeaker - a little help needed!
  64. OPT on the speaker side?
  65. tube circuit conversions?
  66. Current inrush limiter suggestions
  67. Repair of Philips EL6416 amplifiers.
  68. GU-19 In priboi
  69. Duncan Amps PSU Designer II
  70. using existing pre with this circuit
  71. Antek AT-070L Specs
  72. Unused tube sections
  73. Rewire Rectifier Sockets for Tube Substitution
  74. Shuguang 300BC
  75. Sn/Pb S-Sn/Cu ...
  76. What and Where is BAF?
  77. CCS plate follower 12bh7 schematic needed pls
  78. 300B DC heaters confusion
  79. Blue Tube Red Plating = Help!
  80. Tube bass preamplifier power supply (Need Help)
  81. Opera Consonance M500 mkii
  82. 6AC7EH Better but different
  83. For that hard to find 5HY 2 amp choke...
  84. Cleaning up an old ST-70 chassis
  85. Accuphase P250 Amplifier Schematic Requred
  86. Pls Help me, this 6C33C pp Schematic is OK?
  87. Loud Noise due to NFB
  88. NAMM Zoo 2011
  89. Damage to valve amp when powered up but disconnected to speakers?
  90. use more then 'maximum capacitance' after tube rectifier
  91. Headphone Tube Amp D3a
  92. Dared 5.1 tube amp
  93. Designing Transformers with J.C.Maxwell
  94. Cathode resistor calc?
  95. good circuit to use with Grounded Grid Pre
  96. JJ KT88 tubes glowing bright yellow.
  97. Transistorised-Tubed-Magnetic Amplifier
  98. ST-35 Tube Brands
  99. Where you buy iron transformer core for DIY audio transformer
  100. Improve this SP-11 HV supply?
  101. More Antek Iron
  102. Edcor Transformer Specs
  103. Volume control resistance question? Step Attenuator?
  104. Minimum space between 6V6 tube in Push-Pull Amp
  105. GE Jan 6550a for SET amp?
  106. Chassis mount connector strip
  107. Transformer winding - mysterious!
  108. can anyone identify theses OT markings?
  109. Excessive hum with 1960's amp.
  110. Western Electric/Hickock 600A
  111. Pete Millett Uniamp
  112. cathode resistor sudden rising value on 7591
  113. 7591 cathode resistor unstable
  114. David
  115. Looking for a DHT Pre & Phono design / ideas please
  116. Hi, New member just bought k272a kit from Oatley
  117. Building an amp from scratch - what features would i want
  118. Lafayette LA215 voltage problem !
  119. 12ax7: How to maximize output?
  120. Low voltage tube pre-amp for T-amp
  121. Hybride bipolair amp
  122. Single end amp power supply upgrade
  123. Pentode curves - how to find operating point withoud going crazy?
  124. 6922 into 6H30 socket ?
  125. Headwize 6N1P OTL headphone amp having hum
  126. Need help to calculate R in a CCS!
  127. #40-LL1660-4*2A3
  128. Help with stereo tube amp design from parts
  129. Decoupling cap hum
  130. Plate chokes
  131. Tube output protection
  132. 12EN6 in triode mode...fine ???
  133. used 12at7
  134. Need advise with NFB loop
  135. Very basic grid question????
  136. 12AX7 PULSE
  137. short article about operating points
  138. How is an amp's output measured?
  139. current/cathode feedback
  140. 6N23P, transistor PP hybrid amp project.
  141. Transformer choice for DC heater supply?
  142. Help me with i177 tubetester
  143. HeathKit Euw-15 Tube power Supply failure.
  144. Got unknown tube preamp board, need help!
  145. Ergo-Ella + Budget AVC Do-It-Box
  146. Phono pre amp question.
  147. Zener regulation for fixed-bias supply
  148. hot transformer
  149. H. H. Scott 299C output transformers
  150. decisions fostex and the DIY-K12G budget system..
  151. LTSpice GU19 GU29 6R3S
  152. power transfo as HT choke
  153. Dummy newb needs help with Bogen VP17X
  154. Modding the SAKUA AV200
  155. Anybody use 841s(VT-51)?
  156. Help me make use of these transformers
  157. Wiring Buck Transformer with GE transformer Help!
  158. audio research sp9
  159. WE417A Valve Preamplifier
  160. Hi-Fi Tube Amplifier and more
  161. Radford SC-22 Restoration - Input Transistor Biasing Question
  162. 805 MonoBlock SE Amp Kit?
  163. Back to back toroids
  164. 6AU6 in CCS circuits
  165. Morgan Jones' RIAA Pre-Amp
  166. Pre-amp using Hammond 372FX (300-0-300, 5, 6,3) - suggestions?
  167. Building an Aikido LV for a headphone amp
  168. What to do with a 6L6-GC?
  169. loose plate caps, hi temp glue???
  170. Power supply question
  171. RCA Line Input Shielding Technique Help
  172. Grommes 260A DIY report, questions, suggestions
  173. Line out from tube organ
  174. Minimum Gain Stage Rg Value?
  175. One-half 6H30
  176. Novice In Over His Head
  177. Twisted Heater Wires
  178. Little Dot MK III - noisy / oscillation?
  179. Rundmaus at work - PP1C without sand
  180. Power transformer for Firefly Amp?
  181. where to start? 2 channel SS/tube bass preamp
  182. mr liang 845
  183. RH84 (EL84) Choke etc...
  184. Gyrator Loaded 12b4A: The Latest Version.
  185. Wood Trimmed Chassis
  186. Sansui BA-303
  187. Stepped Attenuator - Ebay Seiden DACT Goldpoint Elma Shallco?
  188. hybrid amp with dht or idht inputs?
  189. Balanced to Unbalanced Line Conversion
  190. Headphone amplifier with TH100 tube
  191. Happy New Year - A New Amp to Argue About...
  192. fee-nix, the desktop amp
  193. Any thoughts on what damage I did?
  194. So. Cal. Ham Festival?
  195. zener LTSpice model
  196. Mini-console Schematic
  197. Will this circuit work Ok?
  198. tube CCS below cathodes, startup issues?
  199. Why the wimpy 300B operating points?
  200. Bench supply ideas
  201. A Newbie Tx Question
  202. Volume Control Help!
  203. Could anyone opine on this circuit?
  204. 5U4 Rectifier. Maximum filter cap value?
  205. Grounding outputs?
  206. Happy holidays folks.
  207. Thermionic diode
  208. Lafayette amp arcing Rectifier problem
  209. ECF801 any good for audio
  210. Harman Kardon Citation II PI question
  211. 6N1P
  212. Shorted secondary windings of transformer
  213. Toasted my rectifier - need some pointers to troubleshoot
  214. Parallel amp connection to speakers, SS + tube
  215. Loose pin on a JJ 300B
  216. Measuring milliamp with Fluke 771 Clamp Meter Question?
  217. Spice - and Sting is nowhere to be seen...
  218. Realistic Stereo 24
  219. 6N3P-EV measured Ia/Va/Vg curves
  220. Anyone have the Meng Mini X1 amp here?
  221. EL84/6SN7 tube amp
  222. Something Like A 6EU7?
  223. Which 845 amp?
  224. another 12ax7 preamp
  225. SOHA v2 cost
  226. Yarland FV34C-111 Valve substitution
  227. My Latest DIY Draft (Beta) Build - Resurrected Sansui AU-111
  228. XiangSheng D-2020-KT88
  229. Edcor vs Electra-Print
  230. adding headphone jack to dynaco pas 3 clone
  231. Revising an old tube preamp section: where to get the knowledge?
  232. 6CG7 Bias Current?
  233. Output Pentode Screen at half Plate voltage
  234. PP to parallel
  235. Edcor vs Electra-Print
  236. Show off your P2P wiring.
  237. adapting 2 SE boards for a PP driver stage
  238. Freed transformer info needed
  239. Recomended connectors?
  240. COSMOS amp, Japan
  241. Advantage to constant current draw from power supply?
  242. SP9 schematic questions...
  243. Would you rebuild this?
  244. possible advantage to global???
  245. Correct Path: Diodes Or Rectifier Tube?
  246. 6BQ5 Bias Point Help
  247. Old Hammond 1640SE OPT
  248. Copland CVA 306 Can work only with 2 tubes ??
  249. Cleaning Edison Price posts
  250. need help on treble distortion with my EAR834p phono

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