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

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