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  1. Troubleshoot help for vibrato type problem
  2. using existing pre with this circuit
  3. Laney Tube Fusion 200 series 2 footswitch
  4. Antek AT-070L Specs
  5. Unused tube sections
  6. Rewire Rectifier Sockets for Tube Substitution
  7. Shuguang 300BC
  8. Sn/Pb S-Sn/Cu ...
  9. What and Where is BAF?
  10. CCS plate follower 12bh7 schematic needed pls
  11. 300B DC heaters confusion
  12. Blue Tube Red Plating = Help!
  13. Tube bass preamplifier power supply (Need Help)
  14. Opera Consonance M500 mkii
  15. 6AC7EH Better but different
  16. For that hard to find 5HY 2 amp choke...
  17. Cleaning up an old ST-70 chassis
  18. Accuphase P250 Amplifier Schematic Requred
  19. Pls Help me, this 6C33C pp Schematic is OK?
  20. Loud Noise due to NFB
  21. NAMM Zoo 2011
  22. Recommended O'Scope Reading?
  23. Damage to valve amp when powered up but disconnected to speakers?
  24. preferred resistor type
  25. use more then 'maximum capacitance' after tube rectifier
  26. Headphone Tube Amp D3a
  27. Dared 5.1 tube amp
  28. Designing Transformers with J.C.Maxwell
  29. Cathode resistor calc?
  30. Selector switch question
  31. good circuit to use with Grounded Grid Pre
  32. JJ KT88 tubes glowing bright yellow.
  33. Transistorised-Tubed-Magnetic Amplifier
  34. ST-35 Tube Brands
  35. Where you buy iron transformer core for DIY audio transformer
  36. Improve this SP-11 HV supply?
  37. More Antek Iron
  38. Edcor Transformer Specs
  39. Volume control resistance question? Step Attenuator?
  40. Minimum space between 6V6 tube in Push-Pull Amp
  41. GE Jan 6550a for SET amp?
  42. Chassis mount connector strip
  43. Transformer winding - mysterious!
  44. can anyone identify theses OT markings?
  45. Excessive hum with 1960's amp.
  46. Western Electric/Hickock 600A
  47. Pete Millett Uniamp
  48. cathode resistor sudden rising value on 7591
  49. 7591 cathode resistor unstable
  50. David
  51. Looking for a DHT Pre & Phono design / ideas please
  52. Hi, New member just bought k272a kit from Oatley
  53. Building an amp from scratch - what features would i want
  54. Lafayette LA215 voltage problem !
  55. 12ax7: How to maximize output?
  56. Low voltage tube pre-amp for T-amp
  57. Hybride bipolair amp
  58. Single end amp power supply upgrade
  59. Pentode curves - how to find operating point withoud going crazy?
  60. 6922 into 6H30 socket ?
  61. Headwize 6N1P OTL headphone amp having hum
  62. Need help to calculate R in a CCS!
  63. #40-LL1660-4*2A3
  64. Help with stereo tube amp design from parts
  65. Decoupling cap hum
  66. Plate chokes
  67. Tube output protection
  68. 12EN6 in triode mode...fine ???
  69. used 12at7
  70. Need advise with NFB loop
  71. 1964 Amplifier!!
  72. Very basic grid question????
  73. 12AX7 PULSE
  74. short article about operating points
  75. How is an amp's output measured?
  76. current/cathode feedback
  77. 6N23P, transistor PP hybrid amp project.
  78. Transformer choice for DC heater supply?
  79. Help me with i177 tubetester
  80. HeathKit Euw-15 Tube power Supply failure.
  81. Got unknown tube preamp board, need help!
  82. Ergo-Ella + Budget AVC Do-It-Box
  83. Phono pre amp question.
  84. Zener regulation for fixed-bias supply
  85. hot transformer
  86. H. H. Scott 299C output transformers
  87. decisions fostex and the DIY-K12G budget system..
  88. LTSpice GU19 GU29 6R3S
  89. power transfo as HT choke
  90. Dummy newb needs help with Bogen VP17X
  91. Modding the SAKUA AV200
  92. Anybody use 841s(VT-51)?
  93. Help me make use of these transformers
  94. Wiring Buck Transformer with GE transformer Help!
  95. audio research sp9
  96. WE417A Valve Preamplifier
  97. Hi-Fi Tube Amplifier and more
  98. Radford SC-22 Restoration - Input Transistor Biasing Question
  99. Tube Tester
  100. Looking for off-the-wall oil caps
  101. 805 MonoBlock SE Amp Kit?
  102. Back to back toroids
  103. 6AU6 in CCS circuits
  104. Morgan Jones' RIAA Pre-Amp
  105. Pre-amp using Hammond 372FX (300-0-300, 5, 6,3) - suggestions?
  106. Building an Aikido LV for a headphone amp
  107. What to do with a 6L6-GC?
  108. loose plate caps, hi temp glue???
  109. Power supply question
  110. RCA Line Input Shielding Technique Help
  111. Randall shutting down
  112. Grommes 260A DIY report, questions, suggestions
  113. Line out from tube organ
  114. Minimum Gain Stage Rg Value?
  115. One-half 6H30
  116. Novice In Over His Head
  117. Twisted Heater Wires
  118. Guitar amplifier PSU hum woes
  119. Little Dot MK III - noisy / oscillation?
  120. Rundmaus at work - PP1C without sand
  121. Power transformer for Firefly Amp?
  122. where to start? 2 channel SS/tube bass preamp
  123. mr liang 845
  124. RH84 (EL84) Choke etc...
  125. Gyrator Loaded 12b4A: The Latest Version.
  126. Wood Trimmed Chassis
  127. Sansui BA-303
  128. Stepped Attenuator - Ebay Seiden DACT Goldpoint Elma Shallco?
  129. hybrid amp with dht or idht inputs?
  130. Balanced to Unbalanced Line Conversion
  131. Headphone amplifier with TH100 tube
  132. Happy New Year - A New Amp to Argue About...
  133. fee-nix, the desktop amp
  134. Any thoughts on what damage I did?
  135. So. Cal. Ham Festival?
  136. zener LTSpice model
  137. Mini-console Schematic
  138. Will this circuit work Ok?
  139. tube CCS below cathodes, startup issues?
  140. Why the wimpy 300B operating points?
  141. can a cathode follower drive a tone stack and an effects loop?
  142. Bench supply ideas
  143. A Newbie Tx Question
  144. Volume Control Help!
  145. Could anyone opine on this circuit?
  146. 5U4 Rectifier. Maximum filter cap value?
  147. Grounding outputs?
  148. Happy holidays folks.
  149. Thermionic diode
  150. Lafayette amp arcing Rectifier problem
  151. ECF801 any good for audio
  152. Harman Kardon Citation II PI question
  153. 6N1P
  154. Need advice for a 93 Fender "The Twin"
  155. Shorted secondary windings of transformer
  156. Toasted my rectifier - need some pointers to troubleshoot
  157. Parallel amp connection to speakers, SS + tube
  158. Loose pin on a JJ 300B
  159. Measuring milliamp with Fluke 771 Clamp Meter Question?
  160. Spice - and Sting is nowhere to be seen...
  161. Realistic Stereo 24
  162. 6N3P-EV measured Ia/Va/Vg curves
  163. Anyone have the Meng Mini X1 amp here?
  164. EL84/6SN7 tube amp
  165. Something Like A 6EU7?
  166. Which 845 amp?
  167. another 12ax7 preamp
  168. SOHA v2 cost
  169. Yarland FV34C-111 Valve substitution
  170. My Latest DIY Draft (Beta) Build - Resurrected Sansui AU-111
  171. XiangSheng D-2020-KT88
  172. Edcor vs Electra-Print
  173. adding headphone jack to dynaco pas 3 clone
  174. Revising an old tube preamp section: where to get the knowledge?
  175. 3 Caps parallel to series vs ??? Sonic Performance?
  176. 6CG7 Bias Current?
  177. Output Pentode Screen at half Plate voltage
  178. PP to parallel
  179. Edcor vs Electra-Print
  180. Show off your P2P wiring.
  181. adapting 2 SE boards for a PP driver stage
  182. Freed transformer info needed
  183. Recomended connectors?
  184. COSMOS amp, Japan
  185. Advantage to constant current draw from power supply?
  186. SP9 schematic questions...
  187. Would you rebuild this?
  188. possible advantage to global???
  189. Correct Path: Diodes Or Rectifier Tube?
  190. 6BQ5 Bias Point Help
  191. Old Hammond 1640SE OPT
  192. Copland CVA 306 Can work only with 2 tubes ??
  193. Cleaning Edison Price posts
  194. need help on treble distortion with my EAR834p phono
  195. SE 6CB5A amp with 6N7 driver
  196. McAlister PP150
  197. Standard Input Design Value
  198. Breadboard help
  199. Odd amp built with PL81 / PL36
  200. Has anyone built a 47 SE amp?
  201. Which EL84
  202. First attempt p2p valve power amp
  203. Fundamental Pentode Question
  204. EL34 Triode Mode Resistors
  205. 807 SE Schematic Critiques
  206. Amp for Magneplanar 1.6
  207. After Christmas free time
  208. Tubelab Single Ended Amps
  209. I suppose I am a little dense
  210. 12AU7 SE practise amp project
  211. LED bias with gNFB
  212. Schematic question - what this cap is for ?
  213. Hi fi stereo tube amp through guitar speakers??
  214. Output transformer
  215. 50C5s in PP ?
  216. input resistor on the JE LAB 300B
  217. Sockets for UY 41
  218. Any good tube amp kits for a first attempt?
  219. power supply suggestions and advice
  220. favourite midrange,treble tubes
  221. How can I turn 120VAC to 100VAC for Tango MS-UVD in an 845 SE amp?
  222. suspect a bad tube-any simple checks?
  223. Long-Tailed Pair, pse. share your views...
  224. 12AT7 vs 6SL7 as splitter for 6V6 ppp amp
  225. Ultralinear but no UL taps.
  226. OPT Question
  227. An Important Dumb Question-Newbie Stuff
  228. Switched to LED bias on 6SN7 cathode - how do I calculate current?
  229. Autobias OTL....Any thoughts?
  230. Valve Line Amp suggestions
  231. another 6c33 se
  232. no sound on the PHONO channel....
  233. What do you think of this cheap tube amplifier?
  234. What guitar amp should I build from these?
  235. EL34 Hickok 439B setup
  236. Hickok 605
  237. Help! Want to Diy Tube Amp!
  238. Anyone care for some troubleshooting? Hum issue
  239. Re-tubing stock ST70
  240. your opinion of this bias problem
  241. paraphase with follower
  242. Noisy transformer
  243. 6BN11 in triode mode...any experience ?
  244. morgan jones:output stages
  245. Dynaco SCA-35 - fan Cooling?
  246. Partridge Vs Edcor
  247. Feedback with a choke ?
  248. Do you have a tube tester?
  249. Level matching?
  250. cascoded bjt ccs - design check please

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