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  1. How to measure mains waveform safely?
  2. Wanted - High Power, High Voltage, Audio Frequency Transformer Manual.
  3. Aikido Resistor Help
  4. Changing 6SQ7 to 6SL7 in SE amp
  5. Multi-tap OT
  6. harmon kardon a700 amp output trafo impedance
  7. An SE 813 OPT?? SP. Wound??who zat?
  8. Tube rectifier to diode
  9. The Trioderizer
  10. increasing coupling capacitor value in we 91
  11. diy SE Tube Amp
  12. Max power possible from 6L6 with 6.6k load?
  13. OPT grounding question
  14. Tubelab sse transformer wires
  15. SE sound vs Ultra Linear sound
  16. Modify & build out (2) Western Electric 300B / 2A3 Hammond monoblock amps & UTC LS-5
  17. 6N6P or E182cc spice
  18. Ecl82
  19. Zeiss Ikon Dominar L Amplifier
  20. Beginners attempt at SE 6EM7
  21. Changing 300B Tubelab SE to accomidate 50 triodes
  22. Subbing a 5751 with a 5755
  23. HELP repair a Yamaha T100C combo
  24. Sophia Electric 300B tube
  25. Screen drive and other P-P experiments
  26. Amplifier using a 833A
  27. Circuit help
  28. How much mis-match can an OT take?
  29. SE load mismatch, 8 or 6 or 4 ohms?
  30. Magnavox 196-BA => RH 84 conversion
  31. Capacitor voltage ratings
  32. 40W class A push pull amp with JJ 2A3-40w possible?
  33. "Designing tube preamplifier" article
  34. Valve Tester Guru Help
  35. 6GB5 and Variants as Screen Driven Amps
  36. Gyrator Question
  37. Suggestion Please - Curcuit Simulation & PCB Design Software
  38. Starting to understand.....
  39. Aureavox Arcana 81
  40. Impedance question
  41. spare transformer wires?
  42. Capacitors and maximum voltage ratings
  43. Do Sweep tubes Glow Blue?
  44. Any way to upgrade this circuit? (V. 40's phono amp.)
  45. About tube "matched pairs"
  46. Testing Gm without tube tester
  47. Best place to get Shuguang 300B tubes
  48. Old metal tubes
  49. LTSpice Simulation template?!
  50. 300B pushpull- A new schematic
  51. Drake transformer
  52. TL Audio VP-5051 Valve voice processor
  53. Vtl 750
  54. DC-coupling of tube stages
  55. ThermalTrak transistor application.
  56. weird old amp:need help
  57. Triode Electronics Mark III
  58. Scavenging a broken oscilloscope to turn it into a preamp ?
  59. Silmic caps in cathode bias. Any experience?
  60. Scott LK150 transformer
  61. With the Simple SE I lost 20lbs w/o diet or excercise and I feel great!
  62. Tube Amp / Pre-amp kit?
  63. anything that can go as a Rp.....
  64. Genelex gold lion el84 reissue - ARCING
  65. diy Ampeg preamp
  66. Bias Current Mythbuster?
  67. Exactness of feedback capacitors?
  68. 5608a
  69. You know that you are having a bad day when.......
  70. 1U5 amplifier design, Newbie
  71. 12AU7 Pre-amp Schematic Question
  72. Capacitor Question...
  73. Beam pentodes and suppressor-grid pentodes of same type
  74. Quick question about CT and FWB
  75. 46 and the Tubelab SE
  76. Frank's 6SN7 line stage / preamp with GlassWare PS-1?
  77. knobs, lights and switches?
  78. SimpleSE OP Hammond bigger than the 125ESE
  79. Speaker impedance linearisation
  80. Differential filter circuit: biasing problem
  81. Curves for 12AH7
  82. Schematic for Audio Note Japan Kassai
  83. Help with schematic understanding
  84. SEPP output transformer
  85. Fixed bias design question
  86. Strange bias circuit. WTF?
  87. 5687 preamp transformer
  88. Anyone know of a dual pentode suitable for a LTP.
  89. Output transformer current and power ratings
  90. Diodes to protect OT's..
  91. Simple SE: ???Dumb Tube Rectifier question???
  92. Speakers for tube amps
  93. Help on power supply
  94. Line output transformer question
  95. Solid vs stranded wire in amplifier circuits
  96. Screen Drive Push Pull ideas
  97. 12AT7/46 Direct Reactance Drive Amp
  98. Bridge rectifier vs Full wave rectifier
  99. Isolation Transformer Question
  100. Glow tubes as series regs ?
  101. Glow tube shunt reg stability
  102. Some interesting reading about Sweep tubes
  103. What is this?
  104. What's A "Timber bulb"?
  105. aikido/807PSE and local feedback
  106. Repairing paper in oil caps.
  107. Optoisolator compressor ideas
  108. Airgap for filament transformer ?
  109. Tube stereo for E 60 including TDA1541 cd player
  110. Bad Boy amplifier Tubelab.com style
  111. is there a typo in the Tubelab SE schematic?
  112. Theta Amp problem
  113. 12A_7 vs 6SN7EH vs EF86?
  114. Mixing two channels in the preamp or at the phase splitter?
  115. amp input cap for crossover
  116. Audio Transformer/Cathode Feedback Info
  117. Determining cathode resistor
  118. Tube Pin Schematic Question
  119. Simple SE blowing fuses
  120. Best looking tube?
  121. Identifying Stancor Power transformers
  122. HT crowbar
  123. "Bevois Valley" in triode, what to do with the feedback?
  124. Purple Glow
  125. When to use a grid leak resistor?
  126. Mcintosh MA 2275
  127. Marshall 18W clone (sort of)
  128. Cathode feedback on the simple SE
  129. Blowing output transformer
  130. Kenwood KW-44 hum
  131. Tube system for classical audio
  132. Novel method to reduce filament hum in SE Amp?
  133. Help with 6SN7 w/ CCS
  134. Fisher X-101-D
  135. best tube (not amp)
  136. Simple SE Cap and layout questions???
  137. Simple SE - one channel intermittent problem
  138. ML4/ML6 British triode
  139. transformer rubbish
  140. Identifying output transformer leads
  141. Grounding Aikido and F4
  142. Determining ratings for unknown Power Transformers
  143. Tube heaven - or tube hell?
  144. Fender "Evil Twin" Hi/Low output = same level
  145. Sub amp/speaker to compliment S5 electronics K 12 G tube amp
  146. Troubleshooting hum in 12b4 preamp.. finally almost done!!
  147. SE cathode bias question
  148. k-12G / K-12M with 4 Ohm speakers
  149. About united electron tube
  150. 6c33c-b & 6c33c-v
  151. would like a substitute for Sowter 3575-C
  152. My first tube project WIP
  153. Tube rectifiede +- supply...
  154. the buzzing from amplifiers
  155. MC prepre with submini tubes
  156. 12AU7 Preamp build
  157. Bias/ Plate dissipation question
  158. Has anyone screen driven an EL84?
  159. tube pre amp for phone stage
  160. 6080 se cathode follower
  161. Amplifier suggestions for EPA OPT please
  162. Which tube? How much power can it produce?
  163. Graaf GM20 mods - help!
  164. xpp amplifier question
  165. 520v in PP UL...?
  166. New ST-70 blowing 3 amp slow blow fuse
  167. Was There a Heathkit W-1M or WM?
  168. 8ohm speakers 4ohm tap
  169. Upgrading the Conrad Johnson Premier Fourteen preamp
  170. Noob's first build !!!!
  171. 6sf5gt ??
  172. Measuring technics practical, the allaround reference method?
  173. 2A3 or KT88 ?
  174. What to build with these tubes?
  175. line output transformer help
  176. 6L6GC Options and Flavors
  177. Chinese Buffer Amp, Useful?
  178. 6C33C SE Amp - Ideas on refinement?
  179. 6BM8 Equivalent
  180. Newbie wants to rebuild a Stromberg Carlson ASR-433
  181. RH84 questions
  182. VTL Manley 807 push pull ultra linear
  183. Seeking Pentode-Triode with a 12AX7 half...
  184. Modern tube amplifier designs?
  185. 6n6p transformer output impedance
  186. 814 triode curves
  187. Bias Question
  188. Building a variac
  189. Is my 300B tube dead?
  190. One channel quiet - any bright ideas?
  191. Saw them coming (stupid prices on ebay)
  192. EL36/6CM5 pp design critique
  193. Driving Raven R2 with tubes
  194. Does Anyone Know What This Is?
  195. Need help with tubes problem...
  196. 6V6GT push pull NFB resistor value
  197. Power cord for single ended triode
  198. Virtual chokes
  199. 12AU7 based preamp hums when output cable is touched!
  200. Possible Test equipment find.
  201. 6ak5-45
  202. Using coax for signal wiring?
  203. Chassis Plate Finish
  204. Schade84
  205. Fisher 800c selenium rectifier pictures
  206. Bass amp from spare parts
  207. Looking for tips on operating points for tubes in anode follower ...
  208. Transformer in the cathodes ??
  209. Fisher 800c static,crackle
  210. 19J6 replacement
  211. Newbie tube buffer kit
  212. Simple se parts, all needed?
  213. Any recommendations for tube for vari-mu compressor?
  214. AMC CVT 3030 Bias Procedure
  215. Cascading volumes on a 5C3 amp
  216. Anyone used a edcor cxpp100-ms-5k OT
  217. Noisy gain boost
  218. Troubleshooting hum issues with batteries?
  219. Rectifying Heater Supply
  220. tube heater over voltage!please help...
  221. rca 829b bias ? Audioromy 828
  222. 10k winding, 100k pot
  223. What is the definition of a 'good tube'?
  224. 3-stage DC-coupled Ampl
  225. 1946 Philco Tube Receiver
  226. A New Source for James Transformers
  227. Edcor Site Down? Gone? anyone know anything?
  228. Please suggest practical DIY uses for these BIG oil caps
  229. How to calculate DRD amps..
  230. PL-519 Tube - Tell me more please...
  231. Need ideas for amp with 2A3, One Electron UBT-3
  232. Favourites discrete brand for tube amp
  233. Pharmicia EPS500/400 Power supply - tube use
  234. Black Art Audio
  235. 12AX7/12BH7 Hammond Tube Preamp Project
  236. Dampen transformer endbells?
  237. Do I have DC on my AC line?
  238. GM-70 cathode feed SE amplifier
  239. Rogers cadet mk 2 newbie project experience required
  240. Mcintosh amps transformer rewinding, help needed please!
  241. Using an output tranny from a stereo for a single-ended amplifier ?
  242. 6336A Single Ended.
  243. UA 175 Urei 175
  244. Morgan Jones 5842 RIAA
  245. Question about current ratings of Hammond 300 series power transformers.
  246. Cathode Windings
  247. Phono stage for 12B4 amp [from previous thread]
  248. Looking for schematic of 26 WOT Preamp
  249. Transformer Lam Questions
  250. Schottky diode bias

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