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  1. Help with powering down a trafo
  2. Computer program for tube curves and Spice models
  3. Physical orientation of transformers
  4. Which EL34 tubes for Hi Fi
  5. Choke input power supply, capacitor ratings
  6. EL36/6CM5 SE design critique
  7. New 6F6 Amplifier Project
  8. Transformerless Tube Amp
  9. GE sealants: which to use?
  10. Bias supply and grid current
  11. US Army Russian Electronics Dictionary
  12. Speaker Pop!
  13. Steve Bench RIAA preamp users
  14. MAC free schematic drawing software?
  15. Using James JS-6123HS with EL84 SE is overkilled?
  16. Volume pot for simple se
  17. s5electronics 16ls schematic
  18. New to valve amps - given a 'project'
  19. Are there any loctal PC sockets?
  20. cheap and easy tube preamp
  21. Stereo bass problem
  22. SRS-360 East German transmitting tubes
  23. What the heck does a getter do ?
  24. Capacitor polarization help!
  25. MasterSound Tube Amplifier
  26. PC900 / EC900 curves
  27. 2x 12AX7 preamp fuse value
  28. Crackling Noise in Tube Amp (only) & PC Sound Card
  29. The Mullard 3-3
  30. Audio Research D125 Schematic?
  31. Glass B1. Need advise
  32. Eagle Library for OPT?
  33. Computing or measuring anode curves w/ CFB
  34. Northlake PT ??
  35. Greatest circuit ever (or weirdest)
  36. Advise for nervous EL84 user
  37. K-12G problems
  38. Changing AC heaters to DC
  39. Phase change when adding gain stage?
  40. XiangSheng Amplifier
  41. Grid stopper resistor for 12B4A?
  42. Lundahl LL1620 SE-OPT : Ultra linear ?
  43. Thordarson transformers
  44. Electra Print & SAC ( Silk )?
  45. Audio Transformer articles I would like copies of !
  46. K-12 with headphones?
  47. cap wire lead covers
  48. Single ended amp, EL34, KT88 ideas??
  49. Kt-66 and Simple SE
  50. Wavebourn Pyramid - VII driver stage
  51. Mysterious OPT winding tap
  52. DHT…. Get rid of the Hum Pot!
  53. Operating Amp Without Load
  54. Tube choices for Simple SE?
  55. Looking for information on old thread
  56. Tube Leveling Amplifier
  57. Anyone with knowledge of the 12b4?
  58. 7695...useful audio tube??
  59. simple se blowing rectifier and fuse
  60. PSUD - How do interpret the results?
  61. Solder station
  62. TubeLab SE blowing fuse on B+ ramp up
  63. preamp for pl504 amp
  64. Resistor after volume pot
  65. 6021 Amp project..looking for some input
  66. 807 SE project started....
  67. Fun with glow tubes, a success story
  68. OPT question
  69. Cheap and easy vacuum impregnation
  70. How to measure mains waveform safely?
  71. Wanted - High Power, High Voltage, Audio Frequency Transformer Manual.
  72. Aikido Resistor Help
  73. Changing 6SQ7 to 6SL7 in SE amp
  74. Multi-tap OT
  75. harmon kardon a700 amp output trafo impedance
  76. An SE 813 OPT?? SP. Wound??who zat?
  77. Tube rectifier to diode
  78. The Trioderizer
  79. increasing coupling capacitor value in we 91
  80. diy SE Tube Amp
  81. Max power possible from 6L6 with 6.6k load?
  82. OPT grounding question
  83. Tubelab sse transformer wires
  84. SE sound vs Ultra Linear sound
  85. Modify & build out (2) Western Electric 300B / 2A3 Hammond monoblock amps & UTC LS-5
  86. 6N6P or E182cc spice
  87. Ecl82
  88. Zeiss Ikon Dominar L Amplifier
  89. Beginners attempt at SE 6EM7
  90. Changing 300B Tubelab SE to accomidate 50 triodes
  91. Subbing a 5751 with a 5755
  92. Sophia Electric 300B tube
  93. Screen drive and other P-P experiments
  94. Amplifier using a 833A
  95. Circuit help
  96. How much mis-match can an OT take?
  97. SE load mismatch, 8 or 6 or 4 ohms?
  98. Magnavox 196-BA => RH 84 conversion
  99. 40W class A push pull amp with JJ 2A3-40w possible?
  100. "Designing tube preamplifier" article
  101. Valve Tester Guru Help
  102. 6GB5 and Variants as Screen Driven Amps
  103. Gyrator Question
  104. Suggestion Please - Curcuit Simulation & PCB Design Software
  105. Starting to understand.....
  106. Aureavox Arcana 81
  107. Impedance question
  108. spare transformer wires?
  109. Capacitors and maximum voltage ratings
  110. Do Sweep tubes Glow Blue?
  111. Any way to upgrade this circuit? (V. 40's phono amp.)
  112. About tube "matched pairs"
  113. Testing Gm without tube tester
  114. Best place to get Shuguang 300B tubes
  115. Old metal tubes
  116. LTSpice Simulation template?!
  117. 300B pushpull- A new schematic
  118. Drake transformer
  119. TL Audio VP-5051 Valve voice processor
  120. Vtl 750
  121. DC-coupling of tube stages
  122. ThermalTrak transistor application.
  123. weird old amp:need help
  124. Triode Electronics Mark III
  125. Scavenging a broken oscilloscope to turn it into a preamp ?
  126. Silmic caps in cathode bias. Any experience?
  127. Scott LK150 transformer
  128. With the Simple SE I lost 20lbs w/o diet or excercise and I feel great!
  129. Tube Amp / Pre-amp kit?
  130. anything that can go as a Rp.....
  131. Genelex gold lion el84 reissue - ARCING
  132. Bias Current Mythbuster?
  133. Exactness of feedback capacitors?
  134. 5608a
  135. You know that you are having a bad day when.......
  136. 1U5 amplifier design, Newbie
  137. 12AU7 Pre-amp Schematic Question
  138. Beam pentodes and suppressor-grid pentodes of same type
  139. Quick question about CT and FWB
  140. 46 and the Tubelab SE
  141. Frank's 6SN7 line stage / preamp with GlassWare PS-1?
  142. knobs, lights and switches?
  143. SimpleSE OP Hammond bigger than the 125ESE
  144. Speaker impedance linearisation
  145. Differential filter circuit: biasing problem
  146. Curves for 12AH7
  147. Schematic for Audio Note Japan Kassai
  148. Help with schematic understanding
  149. SEPP output transformer
  150. Fixed bias design question
  151. Strange bias circuit. WTF?
  152. 5687 preamp transformer
  153. Anyone know of a dual pentode suitable for a LTP.
  154. Output transformer current and power ratings
  155. Diodes to protect OT's..
  156. Simple SE: ???Dumb Tube Rectifier question???
  157. Speakers for tube amps
  158. Help on power supply
  159. Line output transformer question
  160. Solid vs stranded wire in amplifier circuits
  161. Screen Drive Push Pull ideas
  162. 12AT7/46 Direct Reactance Drive Amp
  163. Bridge rectifier vs Full wave rectifier
  164. Isolation Transformer Question
  165. Glow tubes as series regs ?
  166. Glow tube shunt reg stability
  167. Some interesting reading about Sweep tubes
  168. What is this?
  169. What's A "Timber bulb"?
  170. aikido/807PSE and local feedback
  171. Optoisolator compressor ideas
  172. Airgap for filament transformer ?
  173. Tube stereo for E 60 including TDA1541 cd player
  174. Bad Boy amplifier Tubelab.com style
  175. is there a typo in the Tubelab SE schematic?
  176. Theta Amp problem
  177. 12A_7 vs 6SN7EH vs EF86?
  178. Mixing two channels in the preamp or at the phase splitter?
  179. amp input cap for crossover
  180. Audio Transformer/Cathode Feedback Info
  181. Determining cathode resistor
  182. Tube Pin Schematic Question
  183. Simple SE blowing fuses
  184. Best looking tube?
  185. Identifying Stancor Power transformers
  186. HT crowbar
  187. "Bevois Valley" in triode, what to do with the feedback?
  188. Purple Glow
  189. When to use a grid leak resistor?
  190. Mcintosh MA 2275
  191. Cathode feedback on the simple SE
  192. Blowing output transformer
  193. Kenwood KW-44 hum
  194. Tube system for classical audio
  195. Novel method to reduce filament hum in SE Amp?
  196. Help with 6SN7 w/ CCS
  197. Fisher X-101-D
  198. best tube (not amp)
  199. Simple SE Cap and layout questions???
  200. Simple SE - one channel intermittent problem
  201. ML4/ML6 British triode
  202. transformer rubbish
  203. Identifying output transformer leads
  204. Grounding Aikido and F4
  205. Determining ratings for unknown Power Transformers
  206. Tube heaven - or tube hell?
  207. Sub amp/speaker to compliment S5 electronics K 12 G tube amp
  208. Troubleshooting hum in 12b4 preamp.. finally almost done!!
  209. SE cathode bias question
  210. k-12G / K-12M with 4 Ohm speakers
  211. About united electron tube
  212. 6c33c-b & 6c33c-v
  213. would like a substitute for Sowter 3575-C
  214. My first tube project WIP
  215. Tube rectifiede +- supply...
  216. the buzzing from amplifiers
  217. MC prepre with submini tubes
  218. 12AU7 Preamp build
  219. Bias/ Plate dissipation question
  220. Has anyone screen driven an EL84?
  221. tube pre amp for phone stage
  222. 6080 se cathode follower
  223. Amplifier suggestions for EPA OPT please
  224. Which tube? How much power can it produce?
  225. Graaf GM20 mods - help!
  226. xpp amplifier question
  227. 520v in PP UL...?
  228. New ST-70 blowing 3 amp slow blow fuse
  229. Was There a Heathkit W-1M or WM?
  230. 8ohm speakers 4ohm tap
  231. Upgrading the Conrad Johnson Premier Fourteen preamp
  232. Noob's first build !!!!
  233. 6sf5gt ??
  234. Measuring technics practical, the allaround reference method?
  235. 2A3 or KT88 ?
  236. What to build with these tubes?
  237. line output transformer help
  238. 6L6GC Options and Flavors
  239. Chinese Buffer Amp, Useful?
  240. 6C33C SE Amp - Ideas on refinement?
  241. 6BM8 Equivalent
  242. Newbie wants to rebuild a Stromberg Carlson ASR-433
  243. RH84 questions
  244. VTL Manley 807 push pull ultra linear
  245. Seeking Pentode-Triode with a 12AX7 half...
  246. Modern tube amplifier designs?
  247. 6n6p transformer output impedance
  248. 814 triode curves
  249. Bias Question
  250. Building a variac

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