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  1. Radford SC-22 Restoration - Input Transistor Biasing Question
  2. Tube Tester
  3. Looking for off-the-wall oil caps
  4. 805 MonoBlock SE Amp Kit?
  5. Back to back toroids
  6. 6AU6 in CCS circuits
  7. Morgan Jones' RIAA Pre-Amp
  8. Pre-amp using Hammond 372FX (300-0-300, 5, 6,3) - suggestions?
  9. Building an Aikido LV for a headphone amp
  10. What to do with a 6L6-GC?
  11. loose plate caps, hi temp glue???
  12. Power supply question
  13. RCA Line Input Shielding Technique Help
  14. Randall shutting down
  15. Grommes 260A DIY report, questions, suggestions
  16. Line out from tube organ
  17. Minimum Gain Stage Rg Value?
  18. One-half 6H30
  19. Novice In Over His Head
  20. Twisted Heater Wires
  21. Guitar amplifier PSU hum woes
  22. Little Dot MK III - noisy / oscillation?
  23. Rundmaus at work - PP1C without sand
  24. Power transformer for Firefly Amp?
  25. where to start? 2 channel SS/tube bass preamp
  26. mr liang 845
  27. RH84 (EL84) Choke etc...
  28. Gyrator Loaded 12b4A: The Latest Version.
  29. Wood Trimmed Chassis
  30. Sansui BA-303
  31. Stepped Attenuator - Ebay Seiden DACT Goldpoint Elma Shallco?
  32. hybrid amp with dht or idht inputs?
  33. Balanced to Unbalanced Line Conversion
  34. Headphone amplifier with TH100 tube
  35. Happy New Year - A New Amp to Argue About...
  36. fee-nix, the desktop amp
  37. Any thoughts on what damage I did?
  38. So. Cal. Ham Festival?
  39. zener LTSpice model
  40. Mini-console Schematic
  41. Will this circuit work Ok?
  42. tube CCS below cathodes, startup issues?
  43. Why the wimpy 300B operating points?
  44. can a cathode follower drive a tone stack and an effects loop?
  45. Bench supply ideas
  46. A Newbie Tx Question
  47. Volume Control Help!
  48. Could anyone opine on this circuit?
  49. 5U4 Rectifier. Maximum filter cap value?
  50. Grounding outputs?
  51. Happy holidays folks.
  52. Thermionic diode
  53. Lafayette amp arcing Rectifier problem
  54. ECF801 any good for audio
  55. Harman Kardon Citation II PI question
  56. 6N1P
  57. Need advice for a 93 Fender "The Twin"
  58. Shorted secondary windings of transformer
  59. Toasted my rectifier - need some pointers to troubleshoot
  60. Parallel amp connection to speakers, SS + tube
  61. Loose pin on a JJ 300B
  62. Measuring milliamp with Fluke 771 Clamp Meter Question?
  63. Spice - and Sting is nowhere to be seen...
  64. Realistic Stereo 24
  65. 6N3P-EV measured Ia/Va/Vg curves
  66. Anyone have the Meng Mini X1 amp here?
  67. EL84/6SN7 tube amp
  68. Something Like A 6EU7?
  69. Which 845 amp?
  70. another 12ax7 preamp
  71. SOHA v2 cost
  72. Yarland FV34C-111 Valve substitution
  73. My Latest DIY Draft (Beta) Build - Resurrected Sansui AU-111
  74. XiangSheng D-2020-KT88
  75. Edcor vs Electra-Print
  76. adding headphone jack to dynaco pas 3 clone
  77. Revising an old tube preamp section: where to get the knowledge?
  78. 3 Caps parallel to series vs ??? Sonic Performance?
  79. 6CG7 Bias Current?
  80. Output Pentode Screen at half Plate voltage
  81. PP to parallel
  82. Edcor vs Electra-Print
  83. Show off your P2P wiring.
  84. adapting 2 SE boards for a PP driver stage
  85. Freed transformer info needed
  86. Recomended connectors?
  87. COSMOS amp, Japan
  88. Advantage to constant current draw from power supply?
  89. SP9 schematic questions...
  90. Would you rebuild this?
  91. possible advantage to global???
  92. Correct Path: Diodes Or Rectifier Tube?
  93. 6BQ5 Bias Point Help
  94. Old Hammond 1640SE OPT
  95. Copland CVA 306 Can work only with 2 tubes ??
  96. Cleaning Edison Price posts
  97. need help on treble distortion with my EAR834p phono
  98. SE 6CB5A amp with 6N7 driver
  99. McAlister PP150
  100. Standard Input Design Value
  101. Breadboard help
  102. Odd amp built with PL81 / PL36
  103. Has anyone built a 47 SE amp?
  104. Which EL84
  105. First attempt p2p valve power amp
  106. Fundamental Pentode Question
  107. EL34 Triode Mode Resistors
  108. 807 SE Schematic Critiques
  109. Amp for Magneplanar 1.6
  110. After Christmas free time
  111. Tubelab Single Ended Amps
  112. I suppose I am a little dense
  113. 12AU7 SE practise amp project
  114. LED bias with gNFB
  115. Schematic question - what this cap is for ?
  116. Hi fi stereo tube amp through guitar speakers??
  117. Output transformer
  118. 50C5s in PP ?
  119. input resistor on the JE LAB 300B
  120. Sockets for UY 41
  121. Any good tube amp kits for a first attempt?
  122. power supply suggestions and advice
  123. favourite midrange,treble tubes
  124. How can I turn 120VAC to 100VAC for Tango MS-UVD in an 845 SE amp?
  125. suspect a bad tube-any simple checks?
  126. Long-Tailed Pair, pse. share your views...
  127. 12AT7 vs 6SL7 as splitter for 6V6 ppp amp
  128. Ultralinear but no UL taps.
  129. OPT Question
  130. An Important Dumb Question-Newbie Stuff
  131. Switched to LED bias on 6SN7 cathode - how do I calculate current?
  132. Autobias OTL....Any thoughts?
  133. Valve Line Amp suggestions
  134. another 6c33 se
  135. no sound on the PHONO channel....
  136. What do you think of this cheap tube amplifier?
  137. What guitar amp should I build from these?
  138. EL34 Hickok 439B setup
  139. Hickok 605
  140. Help! Want to Diy Tube Amp!
  141. Anyone care for some troubleshooting? Hum issue
  142. Re-tubing stock ST70
  143. your opinion of this bias problem
  144. paraphase with follower
  145. Noisy transformer
  146. 6BN11 in triode mode...any experience ?
  147. morgan jones:output stages
  148. Dynaco SCA-35 - fan Cooling?
  149. Partridge Vs Edcor
  150. Feedback with a choke ?
  151. Do you have a tube tester?
  152. Level matching?
  153. cascoded bjt ccs - design check please
  154. Hammond Organ amp to guitar amp
  155. Square wave testing......a guitar amp
  156. help on amp gain structure
  157. iPod/BlackBerry/MP3 input
  158. Shuguang 805 - Advice
  159. Mains Transformer Hums under load
  160. Film Caps in Tube Amps
  161. K12G left channel dead: HELP!
  162. Model 16LS Stereo Integrated Tube Amplifier
  163. Help identifying components
  164. Odd Block Series 1 6L6 Amp Power Supply
  165. Mesa/Boogie Bass 400+ mod question
  166. Need Help for Improving HEATHKIT AA 151
  167. Troubleshooting help for a neophyte
  168. can cap - rectifier spacing
  169. tube dampers anyone
  170. cnc aluminium chassis for tube amps
  171. Balanced Input as Phase Inverter?
  172. 300B SET amp input sensitivity, Help.
  173. Any thoughts on this circuit?
  174. Will This Work? 26 Linestage
  175. Eico HF-89a question
  176. 100TH Ep-Ip Curve
  177. Power Transformer - Can you use separate tap for screens?
  178. Power supply for PP1C - sanity check
  179. Blue Velvet preamp
  180. Paid 5$ for this deluxe/vibrolux schematic! some connections missing help!!
  181. Universal Power Transformer
  182. Tone control in a TubelabSE?
  183. 300B Sweet Spot
  184. Does 81ma sound about right?
  185. Frank's EC8010/6C45P-GM70 SE Interstage.
  186. I need a bit of help to fine tune my PP EL84 amp
  187. IS there any OTL pre amps out there?
  188. Rubycon oil caps
  189. 6BQ5 Sweet Spot?-Charts for other than 250 Screen Volts?
  190. Project Planning (Steps/Order)
  191. Question about coding on tube
  192. 6H13C OTL using 12 parallel tubes
  193. SE 2 watt clean amp?
  194. Transformers for tweeter amps on ferrite donuts
  195. Noob Help: Converting Thomas organ / Wiring
  196. Vintage power transformers
  197. 1625 pp amp layout - comments invited
  198. Grundig 3028 HELP
  199. Oscillation in hybrid amp, how to solve?
  200. Hipass filter to control master bias? - Why attempt to reproduce DC in a tube amp?
  201. Audio Note M-Zero remote control problem
  202. SE TESLA E34L
  203. Need help to restore Sansui 500A
  204. Push-Push OTL?
  205. Stereo Circlotron using only two supplies...
  206. Mercury 1000/2000 KT-88 and 6l6 design bug
  207. Has some tried to use E/PL81 in PPP setup
  208. Heatsinks for tubes?
  209. Mechanical Isolation for a Power Transformer
  210. My First Tube Amp Build: S5 K12G
  211. Size does matter!
  212. tubelabSE with 300b
  213. EL509 (JJ) or PL519?
  214. Clone of JTM45
  215. how can i build a Choke?
  216. A new design
  217. My first and last DIY tube amp !
  218. anyone help convert dual volume to single?
  219. 480-0-480vac To Power A SE GM70!??
  220. Triode plate resistance == internal negative feedback?
  221. Quiz: which tube is this?
  222. 6EM7 Headphone Spud - Please comment
  223. replacement tubes
  224. Mengyue Mini EL34B stereo balance issues..
  225. Email Address for Heiner Jakobi ?
  226. A quick tube matching question
  227. 30W triode?
  228. My Project: Pilot 602
  229. Fake glow LED under valve in commercial devices
  230. Unknown PP output transformers
  231. Switching Amp? 25watts WITH OUT tubes or Transistors?!?
  232. Power Supply B+ voltage?
  233. Newby here first post.
  234. Cheap and easy tube amp.
  235. Rate/critique my Dynaco A410 mods..
  236. Hammond 1650n and Dynaco mark III circuit.
  237. A quick safety question
  238. George RE: 26E6WG
  239. Advice for a beginner please..
  240. Balancing the PP cathode bias
  241. Hybrid Circlotron Amplifier with only 3 components on the signal path
  242. PARTRIGE transformer
  243. Western Electric 205D Tube for Preamp?
  244. Does anyone have the PDF for the Plitron 4142 ?
  245. 16sj8
  246. Mumbo-Jumbo and power supply caps
  247. Restoring Baldwin 40 watt amps
  248. LTspice U/L Transformer Symbol
  249. advice please, a setup to characterise opts
  250. 809's in Class B P-P w/feedback

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