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  1. Are there any loctal PC sockets?
  2. cheap and easy tube preamp
  3. Stereo bass problem
  4. SRS-360 East German transmitting tubes
  5. What the heck does a getter do ?
  6. Capacitor polarization help!
  7. MasterSound Tube Amplifier
  8. PC900 / EC900 curves
  9. 2x 12AX7 preamp fuse value
  10. Crackling Noise in Tube Amp (only) & PC Sound Card
  11. The Mullard 3-3
  12. Audio Research D125 Schematic?
  13. Glass B1. Need advise
  14. Eagle Library for OPT?
  15. Computing or measuring anode curves w/ CFB
  16. Northlake PT ??
  17. Greatest circuit ever (or weirdest)
  18. Advise for nervous EL84 user
  19. K-12G problems
  20. Changing AC heaters to DC
  21. Phase change when adding gain stage?
  22. XiangSheng Amplifier
  23. Grid stopper resistor for 12B4A?
  24. Lundahl LL1620 SE-OPT : Ultra linear ?
  25. Thordarson transformers
  26. Electra Print & SAC ( Silk )?
  27. Audio Transformer articles I would like copies of !
  28. K-12 with headphones?
  29. cap wire lead covers
  30. Single ended amp, EL34, KT88 ideas??
  31. Kt-66 and Simple SE
  32. Wavebourn Pyramid - VII driver stage
  33. Mysterious OPT winding tap
  34. DHT…. Get rid of the Hum Pot!
  35. Operating Amp Without Load
  36. Tube choices for Simple SE?
  37. Looking for information on old thread
  38. Tube Leveling Amplifier
  39. Anyone with knowledge of the 12b4?
  40. 7695...useful audio tube??
  41. simple se blowing rectifier and fuse
  42. PSUD - How do interpret the results?
  43. Solder station
  44. TubeLab SE blowing fuse on B+ ramp up
  45. preamp for pl504 amp
  46. Resistor after volume pot
  47. 6021 Amp project..looking for some input
  48. 807 SE project started....
  49. Fun with glow tubes, a success story
  50. OPT question
  51. Cheap and easy vacuum impregnation
  52. How to measure mains waveform safely?
  53. Wanted - High Power, High Voltage, Audio Frequency Transformer Manual.
  54. Aikido Resistor Help
  55. Changing 6SQ7 to 6SL7 in SE amp
  56. Multi-tap OT
  57. harmon kardon a700 amp output trafo impedance
  58. An SE 813 OPT?? SP. Wound??who zat?
  59. Tube rectifier to diode
  60. The Trioderizer
  61. increasing coupling capacitor value in we 91
  62. diy SE Tube Amp
  63. Max power possible from 6L6 with 6.6k load?
  64. OPT grounding question
  65. Tubelab sse transformer wires
  66. SE sound vs Ultra Linear sound
  67. Modify & build out (2) Western Electric 300B / 2A3 Hammond monoblock amps & UTC LS-5
  68. 6N6P or E182cc spice
  69. Ecl82
  70. Zeiss Ikon Dominar L Amplifier
  71. Beginners attempt at SE 6EM7
  72. Changing 300B Tubelab SE to accomidate 50 triodes
  73. Subbing a 5751 with a 5755
  74. Sophia Electric 300B tube
  75. Screen drive and other P-P experiments
  76. Amplifier using a 833A
  77. Circuit help
  78. How much mis-match can an OT take?
  79. SE load mismatch, 8 or 6 or 4 ohms?
  80. Magnavox 196-BA => RH 84 conversion
  81. Capacitor voltage ratings
  82. 40W class A push pull amp with JJ 2A3-40w possible?
  83. "Designing tube preamplifier" article
  84. Valve Tester Guru Help
  85. 6GB5 and Variants as Screen Driven Amps
  86. Gyrator Question
  87. Suggestion Please - Curcuit Simulation & PCB Design Software
  88. Starting to understand.....
  89. Aureavox Arcana 81
  90. Impedance question
  91. spare transformer wires?
  92. Capacitors and maximum voltage ratings
  93. Do Sweep tubes Glow Blue?
  94. Any way to upgrade this circuit? (V. 40's phono amp.)
  95. About tube "matched pairs"
  96. Testing Gm without tube tester
  97. Best place to get Shuguang 300B tubes
  98. Old metal tubes
  99. LTSpice Simulation template?!
  100. 300B pushpull- A new schematic
  101. Drake transformer
  102. TL Audio VP-5051 Valve voice processor
  103. Vtl 750
  104. DC-coupling of tube stages
  105. ThermalTrak transistor application.
  106. weird old amp:need help
  107. Triode Electronics Mark III
  108. Scavenging a broken oscilloscope to turn it into a preamp ?
  109. Silmic caps in cathode bias. Any experience?
  110. Scott LK150 transformer
  111. With the Simple SE I lost 20lbs w/o diet or excercise and I feel great!
  112. Tube Amp / Pre-amp kit?
  113. anything that can go as a Rp.....
  114. Genelex gold lion el84 reissue - ARCING
  115. Bias Current Mythbuster?
  116. Exactness of feedback capacitors?
  117. 5608a
  118. You know that you are having a bad day when.......
  119. 1U5 amplifier design, Newbie
  120. 12AU7 Pre-amp Schematic Question
  121. Capacitor Question...
  122. Beam pentodes and suppressor-grid pentodes of same type
  123. Quick question about CT and FWB
  124. 46 and the Tubelab SE
  125. Frank's 6SN7 line stage / preamp with GlassWare PS-1?
  126. knobs, lights and switches?
  127. SimpleSE OP Hammond bigger than the 125ESE
  128. Speaker impedance linearisation
  129. Differential filter circuit: biasing problem
  130. Curves for 12AH7
  131. Schematic for Audio Note Japan Kassai
  132. Help with schematic understanding
  133. SEPP output transformer
  134. Fixed bias design question
  135. Strange bias circuit. WTF?
  136. 5687 preamp transformer
  137. Anyone know of a dual pentode suitable for a LTP.
  138. Output transformer current and power ratings
  139. Diodes to protect OT's..
  140. Simple SE: ???Dumb Tube Rectifier question???
  141. Speakers for tube amps
  142. Help on power supply
  143. Line output transformer question
  144. Solid vs stranded wire in amplifier circuits
  145. Screen Drive Push Pull ideas
  146. 12AT7/46 Direct Reactance Drive Amp
  147. Bridge rectifier vs Full wave rectifier
  148. Isolation Transformer Question
  149. Glow tubes as series regs ?
  150. Glow tube shunt reg stability
  151. Some interesting reading about Sweep tubes
  152. What is this?
  153. What's A "Timber bulb"?
  154. aikido/807PSE and local feedback
  155. Repairing paper in oil caps.
  156. Optoisolator compressor ideas
  157. Airgap for filament transformer ?
  158. Tube stereo for E 60 including TDA1541 cd player
  159. Bad Boy amplifier Tubelab.com style
  160. is there a typo in the Tubelab SE schematic?
  161. Theta Amp problem
  162. 12A_7 vs 6SN7EH vs EF86?
  163. Mixing two channels in the preamp or at the phase splitter?
  164. amp input cap for crossover
  165. Audio Transformer/Cathode Feedback Info
  166. Determining cathode resistor
  167. Tube Pin Schematic Question
  168. Simple SE blowing fuses
  169. Best looking tube?
  170. Identifying Stancor Power transformers
  171. HT crowbar
  172. "Bevois Valley" in triode, what to do with the feedback?
  173. Purple Glow
  174. When to use a grid leak resistor?
  175. Mcintosh MA 2275
  176. Cathode feedback on the simple SE
  177. Blowing output transformer
  178. Kenwood KW-44 hum
  179. Tube system for classical audio
  180. Novel method to reduce filament hum in SE Amp?
  181. Help with 6SN7 w/ CCS
  182. Fisher X-101-D
  183. best tube (not amp)
  184. Simple SE Cap and layout questions???
  185. Simple SE - one channel intermittent problem
  186. ML4/ML6 British triode
  187. transformer rubbish
  188. Identifying output transformer leads
  189. Grounding Aikido and F4
  190. Determining ratings for unknown Power Transformers
  191. Tube heaven - or tube hell?
  192. Sub amp/speaker to compliment S5 electronics K 12 G tube amp
  193. Troubleshooting hum in 12b4 preamp.. finally almost done!!
  194. SE cathode bias question
  195. k-12G / K-12M with 4 Ohm speakers
  196. About united electron tube
  197. 6c33c-b & 6c33c-v
  198. would like a substitute for Sowter 3575-C
  199. My first tube project WIP
  200. Tube rectifiede +- supply...
  201. the buzzing from amplifiers
  202. MC prepre with submini tubes
  203. 12AU7 Preamp build
  204. Bias/ Plate dissipation question
  205. Has anyone screen driven an EL84?
  206. tube pre amp for phone stage
  207. 6080 se cathode follower
  208. Amplifier suggestions for EPA OPT please
  209. Which tube? How much power can it produce?
  210. Graaf GM20 mods - help!
  211. xpp amplifier question
  212. 520v in PP UL...?
  213. New ST-70 blowing 3 amp slow blow fuse
  214. Was There a Heathkit W-1M or WM?
  215. 8ohm speakers 4ohm tap
  216. Upgrading the Conrad Johnson Premier Fourteen preamp
  217. Noob's first build !!!!
  218. 6sf5gt ??
  219. Measuring technics practical, the allaround reference method?
  220. 2A3 or KT88 ?
  221. What to build with these tubes?
  222. line output transformer help
  223. 6L6GC Options and Flavors
  224. Chinese Buffer Amp, Useful?
  225. 6C33C SE Amp - Ideas on refinement?
  226. 6BM8 Equivalent
  227. Newbie wants to rebuild a Stromberg Carlson ASR-433
  228. RH84 questions
  229. VTL Manley 807 push pull ultra linear
  230. Seeking Pentode-Triode with a 12AX7 half...
  231. Modern tube amplifier designs?
  232. 6n6p transformer output impedance
  233. 814 triode curves
  234. Bias Question
  235. Building a variac
  236. Is my 300B tube dead?
  237. One channel quiet - any bright ideas?
  238. Saw them coming (stupid prices on ebay)
  239. EL36/6CM5 pp design critique
  240. Driving Raven R2 with tubes
  241. Does Anyone Know What This Is?
  242. Need help with tubes problem...
  243. 6V6GT push pull NFB resistor value
  244. Power cord for single ended triode
  245. Virtual chokes
  246. 12AU7 based preamp hums when output cable is touched!
  247. Possible Test equipment find.
  248. 6ak5-45
  249. Using coax for signal wiring?
  250. Chassis Plate Finish

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