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  1. Very basic grid question????
  2. 12AX7 PULSE
  3. short article about operating points
  4. How is an amp's output measured?
  5. current/cathode feedback
  6. 6N23P, transistor PP hybrid amp project.
  7. Transformer choice for DC heater supply?
  8. Help me with i177 tubetester
  9. HeathKit Euw-15 Tube power Supply failure.
  10. Got unknown tube preamp board, need help!
  11. Ergo-Ella + Budget AVC Do-It-Box
  12. Phono pre amp question.
  13. Zener regulation for fixed-bias supply
  14. hot transformer
  15. H. H. Scott 299C output transformers
  16. decisions fostex and the DIY-K12G budget system..
  17. LTSpice GU19 GU29 6R3S
  18. power transfo as HT choke
  19. Dummy newb needs help with Bogen VP17X
  20. Modding the SAKUA AV200
  21. Anybody use 841s(VT-51)?
  22. Help me make use of these transformers
  23. Wiring Buck Transformer with GE transformer Help!
  24. audio research sp9
  25. WE417A Valve Preamplifier
  26. Hi-Fi Tube Amplifier and more
  27. Radford SC-22 Restoration - Input Transistor Biasing Question
  28. Tube Tester
  29. Looking for off-the-wall oil caps
  30. 805 MonoBlock SE Amp Kit?
  31. Back to back toroids
  32. 6AU6 in CCS circuits
  33. Morgan Jones' RIAA Pre-Amp
  34. Pre-amp using Hammond 372FX (300-0-300, 5, 6,3) - suggestions?
  35. Building an Aikido LV for a headphone amp
  36. What to do with a 6L6-GC?
  37. loose plate caps, hi temp glue???
  38. Power supply question
  39. RCA Line Input Shielding Technique Help
  40. Randall shutting down
  41. Grommes 260A DIY report, questions, suggestions
  42. Line out from tube organ
  43. Minimum Gain Stage Rg Value?
  44. One-half 6H30
  45. Novice In Over His Head
  46. Twisted Heater Wires
  47. Guitar amplifier PSU hum woes
  48. Little Dot MK III - noisy / oscillation?
  49. Rundmaus at work - PP1C without sand
  50. Power transformer for Firefly Amp?
  51. where to start? 2 channel SS/tube bass preamp
  52. mr liang 845
  53. RH84 (EL84) Choke etc...
  54. Gyrator Loaded 12b4A: The Latest Version.
  55. Wood Trimmed Chassis
  56. Sansui BA-303
  57. Stepped Attenuator - Ebay Seiden DACT Goldpoint Elma Shallco?
  58. hybrid amp with dht or idht inputs?
  59. Balanced to Unbalanced Line Conversion
  60. Headphone amplifier with TH100 tube
  61. Happy New Year - A New Amp to Argue About...
  62. fee-nix, the desktop amp
  63. Any thoughts on what damage I did?
  64. So. Cal. Ham Festival?
  65. zener LTSpice model
  66. Mini-console Schematic
  67. Will this circuit work Ok?
  68. tube CCS below cathodes, startup issues?
  69. Why the wimpy 300B operating points?
  70. can a cathode follower drive a tone stack and an effects loop?
  71. Bench supply ideas
  72. A Newbie Tx Question
  73. Volume Control Help!
  74. Could anyone opine on this circuit?
  75. 5U4 Rectifier. Maximum filter cap value?
  76. Grounding outputs?
  77. Happy holidays folks.
  78. Thermionic diode
  79. Lafayette amp arcing Rectifier problem
  80. ECF801 any good for audio
  81. Harman Kardon Citation II PI question
  82. 6N1P
  83. Need advice for a 93 Fender "The Twin"
  84. Shorted secondary windings of transformer
  85. Toasted my rectifier - need some pointers to troubleshoot
  86. Parallel amp connection to speakers, SS + tube
  87. Loose pin on a JJ 300B
  88. Measuring milliamp with Fluke 771 Clamp Meter Question?
  89. Spice - and Sting is nowhere to be seen...
  90. Realistic Stereo 24
  91. 6N3P-EV measured Ia/Va/Vg curves
  92. Anyone have the Meng Mini X1 amp here?
  93. EL84/6SN7 tube amp
  94. Something Like A 6EU7?
  95. Which 845 amp?
  96. another 12ax7 preamp
  97. SOHA v2 cost
  98. Yarland FV34C-111 Valve substitution
  99. My Latest DIY Draft (Beta) Build - Resurrected Sansui AU-111
  100. XiangSheng D-2020-KT88
  101. Edcor vs Electra-Print
  102. adding headphone jack to dynaco pas 3 clone
  103. Revising an old tube preamp section: where to get the knowledge?
  104. 3 Caps parallel to series vs ??? Sonic Performance?
  105. 6CG7 Bias Current?
  106. Output Pentode Screen at half Plate voltage
  107. PP to parallel
  108. Edcor vs Electra-Print
  109. Show off your P2P wiring.
  110. adapting 2 SE boards for a PP driver stage
  111. Freed transformer info needed
  112. Recomended connectors?
  113. COSMOS amp, Japan
  114. Advantage to constant current draw from power supply?
  115. SP9 schematic questions...
  116. Would you rebuild this?
  117. possible advantage to global???
  118. Correct Path: Diodes Or Rectifier Tube?
  119. 6BQ5 Bias Point Help
  120. Old Hammond 1640SE OPT
  121. Copland CVA 306 Can work only with 2 tubes ??
  122. Cleaning Edison Price posts
  123. need help on treble distortion with my EAR834p phono
  124. SE 6CB5A amp with 6N7 driver
  125. McAlister PP150
  126. Standard Input Design Value
  127. Breadboard help
  128. Odd amp built with PL81 / PL36
  129. Has anyone built a 47 SE amp?
  130. Which EL84
  131. First attempt p2p valve power amp
  132. Fundamental Pentode Question
  133. EL34 Triode Mode Resistors
  134. 807 SE Schematic Critiques
  135. Amp for Magneplanar 1.6
  136. After Christmas free time
  137. Tubelab Single Ended Amps
  138. I suppose I am a little dense
  139. 12AU7 SE practise amp project
  140. LED bias with gNFB
  141. Schematic question - what this cap is for ?
  142. Hi fi stereo tube amp through guitar speakers??
  143. Output transformer
  144. 50C5s in PP ?
  145. input resistor on the JE LAB 300B
  146. Sockets for UY 41
  147. Any good tube amp kits for a first attempt?
  148. power supply suggestions and advice
  149. favourite midrange,treble tubes
  150. How can I turn 120VAC to 100VAC for Tango MS-UVD in an 845 SE amp?
  151. suspect a bad tube-any simple checks?
  152. Long-Tailed Pair, pse. share your views...
  153. 12AT7 vs 6SL7 as splitter for 6V6 ppp amp
  154. Ultralinear but no UL taps.
  155. OPT Question
  156. An Important Dumb Question-Newbie Stuff
  157. Switched to LED bias on 6SN7 cathode - how do I calculate current?
  158. Autobias OTL....Any thoughts?
  159. Valve Line Amp suggestions
  160. another 6c33 se
  161. no sound on the PHONO channel....
  162. What do you think of this cheap tube amplifier?
  163. What guitar amp should I build from these?
  164. EL34 Hickok 439B setup
  165. Hickok 605
  166. Help! Want to Diy Tube Amp!
  167. Anyone care for some troubleshooting? Hum issue
  168. Re-tubing stock ST70
  169. your opinion of this bias problem
  170. paraphase with follower
  171. Noisy transformer
  172. 6BN11 in triode mode...any experience ?
  173. morgan jones:output stages
  174. Dynaco SCA-35 - fan Cooling?
  175. Partridge Vs Edcor
  176. Feedback with a choke ?
  177. Do you have a tube tester?
  178. Level matching?
  179. cascoded bjt ccs - design check please
  180. Hammond Organ amp to guitar amp
  181. Square wave testing......a guitar amp
  182. help on amp gain structure
  183. iPod/BlackBerry/MP3 input
  184. Shuguang 805 - Advice
  185. Mains Transformer Hums under load
  186. Film Caps in Tube Amps
  187. K12G left channel dead: HELP!
  188. Model 16LS Stereo Integrated Tube Amplifier
  189. Help identifying components
  190. Odd Block Series 1 6L6 Amp Power Supply
  191. Mesa/Boogie Bass 400+ mod question
  192. Need Help for Improving HEATHKIT AA 151
  193. Troubleshooting help for a neophyte
  194. can cap - rectifier spacing
  195. tube dampers anyone
  196. cnc aluminium chassis for tube amps
  197. Balanced Input as Phase Inverter?
  198. 300B SET amp input sensitivity, Help.
  199. Any thoughts on this circuit?
  200. Will This Work? 26 Linestage
  201. Eico HF-89a question
  202. 100TH Ep-Ip Curve
  203. Power Transformer - Can you use separate tap for screens?
  204. Power supply for PP1C - sanity check
  205. Blue Velvet preamp
  206. Paid 5$ for this deluxe/vibrolux schematic! some connections missing help!!
  207. Universal Power Transformer
  208. Tone control in a TubelabSE?
  209. 300B Sweet Spot
  210. Does 81ma sound about right?
  211. Frank's EC8010/6C45P-GM70 SE Interstage.
  212. I need a bit of help to fine tune my PP EL84 amp
  213. IS there any OTL pre amps out there?
  214. Rubycon oil caps
  215. 6BQ5 Sweet Spot?-Charts for other than 250 Screen Volts?
  216. Project Planning (Steps/Order)
  217. Question about coding on tube
  218. 6H13C OTL using 12 parallel tubes
  219. SE 2 watt clean amp?
  220. Transformers for tweeter amps on ferrite donuts
  221. Noob Help: Converting Thomas organ / Wiring
  222. Vintage power transformers
  223. 1625 pp amp layout - comments invited
  224. Grundig 3028 HELP
  225. Oscillation in hybrid amp, how to solve?
  226. Hipass filter to control master bias? - Why attempt to reproduce DC in a tube amp?
  227. Audio Note M-Zero remote control problem
  228. SE TESLA E34L
  229. Need help to restore Sansui 500A
  230. Push-Push OTL?
  231. Stereo Circlotron using only two supplies...
  232. Mercury 1000/2000 KT-88 and 6l6 design bug
  233. Has some tried to use E/PL81 in PPP setup
  234. Heatsinks for tubes?
  235. Mechanical Isolation for a Power Transformer
  236. My First Tube Amp Build: S5 K12G
  237. Size does matter!
  238. tubelabSE with 300b
  239. EL509 (JJ) or PL519?
  240. Clone of JTM45
  241. how can i build a Choke?
  242. A new design
  243. My first and last DIY tube amp !
  244. anyone help convert dual volume to single?
  245. 480-0-480vac To Power A SE GM70!??
  246. Triode plate resistance == internal negative feedback?
  247. Quiz: which tube is this?
  248. 6EM7 Headphone Spud - Please comment
  249. replacement tubes
  250. Mengyue Mini EL34B stereo balance issues..

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