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  1. Headphone Tube Amp D3a
  2. Dared 5.1 tube amp
  3. Designing Transformers with J.C.Maxwell
  4. Cathode resistor calc?
  5. Selector switch question
  6. good circuit to use with Grounded Grid Pre
  7. JJ KT88 tubes glowing bright yellow.
  8. Transistorised-Tubed-Magnetic Amplifier
  9. ST-35 Tube Brands
  10. Where you buy iron transformer core for DIY audio transformer
  11. Improve this SP-11 HV supply?
  12. More Antek Iron
  13. Edcor Transformer Specs
  14. Volume control resistance question? Step Attenuator?
  15. Minimum space between 6V6 tube in Push-Pull Amp
  16. GE Jan 6550a for SET amp?
  17. Chassis mount connector strip
  18. Transformer winding - mysterious!
  19. can anyone identify theses OT markings?
  20. Excessive hum with 1960's amp.
  21. Western Electric/Hickock 600A
  22. Pete Millett Uniamp
  23. cathode resistor sudden rising value on 7591
  24. 7591 cathode resistor unstable
  25. David
  26. Looking for a DHT Pre & Phono design / ideas please
  27. Hi, New member just bought k272a kit from Oatley
  28. Building an amp from scratch - what features would i want
  29. Lafayette LA215 voltage problem !
  30. 12ax7: How to maximize output?
  31. Low voltage tube pre-amp for T-amp
  32. Hybride bipolair amp
  33. Single end amp power supply upgrade
  34. Pentode curves - how to find operating point withoud going crazy?
  35. 6922 into 6H30 socket ?
  36. Headwize 6N1P OTL headphone amp having hum
  37. Need help to calculate R in a CCS!
  38. #40-LL1660-4*2A3
  39. Help with stereo tube amp design from parts
  40. Decoupling cap hum
  41. Plate chokes
  42. Tube output protection
  43. 12EN6 in triode mode...fine ???
  44. used 12at7
  45. Need advise with NFB loop
  46. 1964 Amplifier!!
  47. Very basic grid question????
  48. 12AX7 PULSE
  49. short article about operating points
  50. How is an amp's output measured?
  51. current/cathode feedback
  52. 6N23P, transistor PP hybrid amp project.
  53. Transformer choice for DC heater supply?
  54. Help me with i177 tubetester
  55. HeathKit Euw-15 Tube power Supply failure.
  56. Got unknown tube preamp board, need help!
  57. Ergo-Ella + Budget AVC Do-It-Box
  58. Phono pre amp question.
  59. Zener regulation for fixed-bias supply
  60. hot transformer
  61. H. H. Scott 299C output transformers
  62. decisions fostex and the DIY-K12G budget system..
  63. LTSpice GU19 GU29 6R3S
  64. power transfo as HT choke
  65. Dummy newb needs help with Bogen VP17X
  66. Modding the SAKUA AV200
  67. Anybody use 841s(VT-51)?
  68. Help me make use of these transformers
  69. Wiring Buck Transformer with GE transformer Help!
  70. audio research sp9
  71. WE417A Valve Preamplifier
  72. Hi-Fi Tube Amplifier and more
  73. Radford SC-22 Restoration - Input Transistor Biasing Question
  74. Tube Tester
  75. Looking for off-the-wall oil caps
  76. 805 MonoBlock SE Amp Kit?
  77. Back to back toroids
  78. 6AU6 in CCS circuits
  79. Morgan Jones' RIAA Pre-Amp
  80. Pre-amp using Hammond 372FX (300-0-300, 5, 6,3) - suggestions?
  81. Building an Aikido LV for a headphone amp
  82. What to do with a 6L6-GC?
  83. loose plate caps, hi temp glue???
  84. Power supply question
  85. RCA Line Input Shielding Technique Help
  86. Randall shutting down
  87. Grommes 260A DIY report, questions, suggestions
  88. Line out from tube organ
  89. Minimum Gain Stage Rg Value?
  90. One-half 6H30
  91. Novice In Over His Head
  92. Guitar amp with 6P6S (6V6) and probably 12AX7
  93. Twisted Heater Wires
  94. Guitar amplifier PSU hum woes
  95. Little Dot MK III - noisy / oscillation?
  96. Rundmaus at work - PP1C without sand
  97. Power transformer for Firefly Amp?
  98. where to start? 2 channel SS/tube bass preamp
  99. mr liang 845
  100. RH84 (EL84) Choke etc...
  101. Gyrator Loaded 12b4A: The Latest Version.
  102. Wood Trimmed Chassis
  103. Sansui BA-303
  104. Stepped Attenuator - Ebay Seiden DACT Goldpoint Elma Shallco?
  105. hybrid amp with dht or idht inputs?
  106. Balanced to Unbalanced Line Conversion
  107. Headphone amplifier with TH100 tube
  108. Happy New Year - A New Amp to Argue About...
  109. fee-nix, the desktop amp
  110. Any thoughts on what damage I did?
  111. So. Cal. Ham Festival?
  112. zener LTSpice model
  113. Mini-console Schematic
  114. Will this circuit work Ok?
  115. tube CCS below cathodes, startup issues?
  116. Why the wimpy 300B operating points?
  117. can a cathode follower drive a tone stack and an effects loop?
  118. Bench supply ideas
  119. A Newbie Tx Question
  120. Volume Control Help!
  121. Could anyone opine on this circuit?
  122. 5U4 Rectifier. Maximum filter cap value?
  123. Grounding outputs?
  124. Happy holidays folks.
  125. Thermionic diode
  126. Lafayette amp arcing Rectifier problem
  127. ECF801 any good for audio
  128. Harman Kardon Citation II PI question
  129. 6N1P
  130. Need advice for a 93 Fender "The Twin"
  131. Shorted secondary windings of transformer
  132. Toasted my rectifier - need some pointers to troubleshoot
  133. Parallel amp connection to speakers, SS + tube
  134. Loose pin on a JJ 300B
  135. Measuring milliamp with Fluke 771 Clamp Meter Question?
  136. Spice - and Sting is nowhere to be seen...
  137. Realistic Stereo 24
  138. 6N3P-EV measured Ia/Va/Vg curves
  139. Anyone have the Meng Mini X1 amp here?
  140. EL84/6SN7 tube amp
  141. Something Like A 6EU7?
  142. Which 845 amp?
  143. another 12ax7 preamp
  144. SOHA v2 cost
  145. Yarland FV34C-111 Valve substitution
  146. My Latest DIY Draft (Beta) Build - Resurrected Sansui AU-111
  147. XiangSheng D-2020-KT88
  148. Edcor vs Electra-Print
  149. adding headphone jack to dynaco pas 3 clone
  150. Revising an old tube preamp section: where to get the knowledge?
  151. 3 Caps parallel to series vs ??? Sonic Performance?
  152. 6CG7 Bias Current?
  153. Output Pentode Screen at half Plate voltage
  154. PP to parallel
  155. Edcor vs Electra-Print
  156. Show off your P2P wiring.
  157. adapting 2 SE boards for a PP driver stage
  158. Freed transformer info needed
  159. Recomended connectors?
  160. COSMOS amp, Japan
  161. Advantage to constant current draw from power supply?
  162. SP9 schematic questions...
  163. Would you rebuild this?
  164. possible advantage to global???
  165. Correct Path: Diodes Or Rectifier Tube?
  166. 6BQ5 Bias Point Help
  167. Old Hammond 1640SE OPT
  168. Copland CVA 306 Can work only with 2 tubes ??
  169. Cleaning Edison Price posts
  170. need help on treble distortion with my EAR834p phono
  171. SE 6CB5A amp with 6N7 driver
  172. McAlister PP150
  173. Standard Input Design Value
  174. Breadboard help
  175. Odd amp built with PL81 / PL36
  176. Has anyone built a 47 SE amp?
  177. Which EL84
  178. First attempt p2p valve power amp
  179. Fundamental Pentode Question
  180. EL34 Triode Mode Resistors
  181. 807 SE Schematic Critiques
  182. Amp for Magneplanar 1.6
  183. After Christmas free time
  184. Tubelab Single Ended Amps
  185. I suppose I am a little dense
  186. 12AU7 SE practise amp project
  187. LED bias with gNFB
  188. Schematic question - what this cap is for ?
  189. Hi fi stereo tube amp through guitar speakers??
  190. Output transformer
  191. 50C5s in PP ?
  192. input resistor on the JE LAB 300B
  193. Sockets for UY 41
  194. Any good tube amp kits for a first attempt?
  195. power supply suggestions and advice
  196. favourite midrange,treble tubes
  197. How can I turn 120VAC to 100VAC for Tango MS-UVD in an 845 SE amp?
  198. suspect a bad tube-any simple checks?
  199. Long-Tailed Pair, pse. share your views...
  200. 12AT7 vs 6SL7 as splitter for 6V6 ppp amp
  201. Ultralinear but no UL taps.
  202. OPT Question
  203. An Important Dumb Question-Newbie Stuff
  204. Switched to LED bias on 6SN7 cathode - how do I calculate current?
  205. Autobias OTL....Any thoughts?
  206. Valve Line Amp suggestions
  207. another 6c33 se
  208. no sound on the PHONO channel....
  209. What do you think of this cheap tube amplifier?
  210. What guitar amp should I build from these?
  211. EL34 Hickok 439B setup
  212. Hickok 605
  213. Help! Want to Diy Tube Amp!
  214. Anyone care for some troubleshooting? Hum issue
  215. Re-tubing stock ST70
  216. your opinion of this bias problem
  217. paraphase with follower
  218. Noisy transformer
  219. 6BN11 in triode mode...any experience ?
  220. morgan jones:output stages
  221. Dynaco SCA-35 - fan Cooling?
  222. Partridge Vs Edcor
  223. Feedback with a choke ?
  224. Do you have a tube tester?
  225. Level matching?
  226. cascoded bjt ccs - design check please
  227. Hammond Organ amp to guitar amp
  228. Square wave testing......a guitar amp
  229. help on amp gain structure
  230. iPod/BlackBerry/MP3 input
  231. Shuguang 805 - Advice
  232. Mains Transformer Hums under load
  233. Film Caps in Tube Amps
  234. K12G left channel dead: HELP!
  235. Model 16LS Stereo Integrated Tube Amplifier
  236. Help identifying components
  237. Odd Block Series 1 6L6 Amp Power Supply
  238. Mesa/Boogie Bass 400+ mod question
  239. Need Help for Improving HEATHKIT AA 151
  240. Troubleshooting help for a neophyte
  241. can cap - rectifier spacing
  242. tube dampers anyone
  243. cnc aluminium chassis for tube amps
  244. Balanced Input as Phase Inverter?
  245. 300B SET amp input sensitivity, Help.
  246. Any thoughts on this circuit?
  247. Will This Work? 26 Linestage
  248. Eico HF-89a question
  249. 100TH Ep-Ip Curve
  250. Power Transformer - Can you use separate tap for screens?