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  1. WE417A Valve Preamplifier
  2. Hi-Fi Tube Amplifier and more
  3. Radford SC-22 Restoration - Input Transistor Biasing Question
  4. Tube Tester
  5. Looking for off-the-wall oil caps
  6. 805 MonoBlock SE Amp Kit?
  7. Back to back toroids
  8. 6AU6 in CCS circuits
  9. Morgan Jones' RIAA Pre-Amp
  10. Pre-amp using Hammond 372FX (300-0-300, 5, 6,3) - suggestions?
  11. Building an Aikido LV for a headphone amp
  12. What to do with a 6L6-GC?
  13. loose plate caps, hi temp glue???
  14. Power supply question
  15. RCA Line Input Shielding Technique Help
  16. Randall shutting down
  17. Grommes 260A DIY report, questions, suggestions
  18. Line out from tube organ
  19. Minimum Gain Stage Rg Value?
  20. One-half 6H30
  21. Novice In Over His Head
  22. Twisted Heater Wires
  23. Guitar amplifier PSU hum woes
  24. Little Dot MK III - noisy / oscillation?
  25. Rundmaus at work - PP1C without sand
  26. Power transformer for Firefly Amp?
  27. where to start? 2 channel SS/tube bass preamp
  28. mr liang 845
  29. RH84 (EL84) Choke etc...
  30. Gyrator Loaded 12b4A: The Latest Version.
  31. Wood Trimmed Chassis
  32. Sansui BA-303
  33. Stepped Attenuator - Ebay Seiden DACT Goldpoint Elma Shallco?
  34. hybrid amp with dht or idht inputs?
  35. Balanced to Unbalanced Line Conversion
  36. Headphone amplifier with TH100 tube
  37. Happy New Year - A New Amp to Argue About...
  38. fee-nix, the desktop amp
  39. Any thoughts on what damage I did?
  40. So. Cal. Ham Festival?
  41. zener LTSpice model
  42. Mini-console Schematic
  43. Will this circuit work Ok?
  44. tube CCS below cathodes, startup issues?
  45. Why the wimpy 300B operating points?
  46. can a cathode follower drive a tone stack and an effects loop?
  47. Bench supply ideas
  48. A Newbie Tx Question
  49. Volume Control Help!
  50. Could anyone opine on this circuit?
  51. 5U4 Rectifier. Maximum filter cap value?
  52. Grounding outputs?
  53. Happy holidays folks.
  54. Thermionic diode
  55. Lafayette amp arcing Rectifier problem
  56. ECF801 any good for audio
  57. Harman Kardon Citation II PI question
  58. 6N1P
  59. Need advice for a 93 Fender "The Twin"
  60. Shorted secondary windings of transformer
  61. Toasted my rectifier - need some pointers to troubleshoot
  62. Parallel amp connection to speakers, SS + tube
  63. Loose pin on a JJ 300B
  64. Measuring milliamp with Fluke 771 Clamp Meter Question?
  65. Spice - and Sting is nowhere to be seen...
  66. Realistic Stereo 24
  67. 6N3P-EV measured Ia/Va/Vg curves
  68. Anyone have the Meng Mini X1 amp here?
  69. EL84/6SN7 tube amp
  70. Something Like A 6EU7?
  71. Which 845 amp?
  72. another 12ax7 preamp
  73. SOHA v2 cost
  74. Yarland FV34C-111 Valve substitution
  75. My Latest DIY Draft (Beta) Build - Resurrected Sansui AU-111
  76. XiangSheng D-2020-KT88
  77. Edcor vs Electra-Print
  78. adding headphone jack to dynaco pas 3 clone
  79. Revising an old tube preamp section: where to get the knowledge?
  80. 3 Caps parallel to series vs ??? Sonic Performance?
  81. 6CG7 Bias Current?
  82. Output Pentode Screen at half Plate voltage
  83. PP to parallel
  84. Edcor vs Electra-Print
  85. Show off your P2P wiring.
  86. adapting 2 SE boards for a PP driver stage
  87. Freed transformer info needed
  88. Recomended connectors?
  89. COSMOS amp, Japan
  90. Advantage to constant current draw from power supply?
  91. SP9 schematic questions...
  92. Would you rebuild this?
  93. possible advantage to global???
  94. Correct Path: Diodes Or Rectifier Tube?
  95. 6BQ5 Bias Point Help
  96. Old Hammond 1640SE OPT
  97. Copland CVA 306 Can work only with 2 tubes ??
  98. Cleaning Edison Price posts
  99. need help on treble distortion with my EAR834p phono
  100. SE 6CB5A amp with 6N7 driver
  101. McAlister PP150
  102. Standard Input Design Value
  103. Breadboard help
  104. Odd amp built with PL81 / PL36
  105. Has anyone built a 47 SE amp?
  106. Which EL84
  107. First attempt p2p valve power amp
  108. Fundamental Pentode Question
  109. EL34 Triode Mode Resistors
  110. 807 SE Schematic Critiques
  111. Amp for Magneplanar 1.6
  112. After Christmas free time
  113. Tubelab Single Ended Amps
  114. I suppose I am a little dense
  115. 12AU7 SE practise amp project
  116. LED bias with gNFB
  117. Schematic question - what this cap is for ?
  118. Hi fi stereo tube amp through guitar speakers??
  119. Output transformer
  120. 50C5s in PP ?
  121. input resistor on the JE LAB 300B
  122. Sockets for UY 41
  123. Any good tube amp kits for a first attempt?
  124. power supply suggestions and advice
  125. favourite midrange,treble tubes
  126. How can I turn 120VAC to 100VAC for Tango MS-UVD in an 845 SE amp?
  127. suspect a bad tube-any simple checks?
  128. Long-Tailed Pair, pse. share your views...
  129. 12AT7 vs 6SL7 as splitter for 6V6 ppp amp
  130. Ultralinear but no UL taps.
  131. OPT Question
  132. An Important Dumb Question-Newbie Stuff
  133. Switched to LED bias on 6SN7 cathode - how do I calculate current?
  134. Autobias OTL....Any thoughts?
  135. Valve Line Amp suggestions
  136. another 6c33 se
  137. no sound on the PHONO channel....
  138. What do you think of this cheap tube amplifier?
  139. What guitar amp should I build from these?
  140. EL34 Hickok 439B setup
  141. Hickok 605
  142. Help! Want to Diy Tube Amp!
  143. Anyone care for some troubleshooting? Hum issue
  144. Re-tubing stock ST70
  145. your opinion of this bias problem
  146. paraphase with follower
  147. Noisy transformer
  148. 6BN11 in triode mode...any experience ?
  149. morgan jones:output stages
  150. Dynaco SCA-35 - fan Cooling?
  151. Partridge Vs Edcor
  152. Feedback with a choke ?
  153. Do you have a tube tester?
  154. Level matching?
  155. cascoded bjt ccs - design check please
  156. Hammond Organ amp to guitar amp
  157. Square wave testing......a guitar amp
  158. help on amp gain structure
  159. iPod/BlackBerry/MP3 input
  160. Shuguang 805 - Advice
  161. Mains Transformer Hums under load
  162. Film Caps in Tube Amps
  163. K12G left channel dead: HELP!
  164. Model 16LS Stereo Integrated Tube Amplifier
  165. Help identifying components
  166. Odd Block Series 1 6L6 Amp Power Supply
  167. Mesa/Boogie Bass 400+ mod question
  168. Need Help for Improving HEATHKIT AA 151
  169. Troubleshooting help for a neophyte
  170. can cap - rectifier spacing
  171. tube dampers anyone
  172. cnc aluminium chassis for tube amps
  173. Balanced Input as Phase Inverter?
  174. 300B SET amp input sensitivity, Help.
  175. Any thoughts on this circuit?
  176. Will This Work? 26 Linestage
  177. Eico HF-89a question
  178. 100TH Ep-Ip Curve
  179. Power Transformer - Can you use separate tap for screens?
  180. Power supply for PP1C - sanity check
  181. Blue Velvet preamp
  182. Paid 5$ for this deluxe/vibrolux schematic! some connections missing help!!
  183. Universal Power Transformer
  184. Tone control in a TubelabSE?
  185. 300B Sweet Spot
  186. Does 81ma sound about right?
  187. Frank's EC8010/6C45P-GM70 SE Interstage.
  188. I need a bit of help to fine tune my PP EL84 amp
  189. IS there any OTL pre amps out there?
  190. Rubycon oil caps
  191. 6BQ5 Sweet Spot?-Charts for other than 250 Screen Volts?
  192. Project Planning (Steps/Order)
  193. Question about coding on tube
  194. 6H13C OTL using 12 parallel tubes
  195. SE 2 watt clean amp?
  196. Transformers for tweeter amps on ferrite donuts
  197. Noob Help: Converting Thomas organ / Wiring
  198. Vintage power transformers
  199. 1625 pp amp layout - comments invited
  200. Grundig 3028 HELP
  201. Oscillation in hybrid amp, how to solve?
  202. Hipass filter to control master bias? - Why attempt to reproduce DC in a tube amp?
  203. Audio Note M-Zero remote control problem
  204. SE TESLA E34L
  205. Need help to restore Sansui 500A
  206. Push-Push OTL?
  207. Stereo Circlotron using only two supplies...
  208. Mercury 1000/2000 KT-88 and 6l6 design bug
  209. Has some tried to use E/PL81 in PPP setup
  210. Heatsinks for tubes?
  211. Mechanical Isolation for a Power Transformer
  212. My First Tube Amp Build: S5 K12G
  213. Size does matter!
  214. tubelabSE with 300b
  215. EL509 (JJ) or PL519?
  216. Clone of JTM45
  217. how can i build a Choke?
  218. A new design
  219. My first and last DIY tube amp !
  220. anyone help convert dual volume to single?
  221. 480-0-480vac To Power A SE GM70!??
  222. Triode plate resistance == internal negative feedback?
  223. Quiz: which tube is this?
  224. 6EM7 Headphone Spud - Please comment
  225. replacement tubes
  226. Mengyue Mini EL34B stereo balance issues..
  227. Email Address for Heiner Jakobi ?
  228. A quick tube matching question
  229. 30W triode?
  230. My Project: Pilot 602
  231. Fake glow LED under valve in commercial devices
  232. Unknown PP output transformers
  233. Switching Amp? 25watts WITH OUT tubes or Transistors?!?
  234. Power Supply B+ voltage?
  235. Newby here first post.
  236. Cheap and easy tube amp.
  237. Rate/critique my Dynaco A410 mods..
  238. Hammond 1650n and Dynaco mark III circuit.
  239. A quick safety question
  240. George RE: 26E6WG
  241. Advice for a beginner please..
  242. Balancing the PP cathode bias
  243. Hybrid Circlotron Amplifier with only 3 components on the signal path
  244. PARTRIGE transformer
  245. Western Electric 205D Tube for Preamp?
  246. Does anyone have the PDF for the Plitron 4142 ?
  247. 16sj8
  248. Mumbo-Jumbo and power supply caps
  249. Restoring Baldwin 40 watt amps
  250. LTspice U/L Transformer Symbol

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