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  1. Capacitor voltage ratings
  2. 40W class A push pull amp with JJ 2A3-40w possible?
  3. "Designing tube preamplifier" article
  4. Valve Tester Guru Help
  5. 6GB5 and Variants as Screen Driven Amps
  6. Gyrator Question
  7. Suggestion Please - Curcuit Simulation & PCB Design Software
  8. Starting to understand.....
  9. Aureavox Arcana 81
  10. Impedance question
  11. spare transformer wires?
  12. Capacitors and maximum voltage ratings
  13. Do Sweep tubes Glow Blue?
  14. Any way to upgrade this circuit? (V. 40's phono amp.)
  15. About tube "matched pairs"
  16. Testing Gm without tube tester
  17. Best place to get Shuguang 300B tubes
  18. Old metal tubes
  19. LTSpice Simulation template?!
  20. 300B pushpull- A new schematic
  21. Drake transformer
  22. TL Audio VP-5051 Valve voice processor
  23. Vtl 750
  24. DC-coupling of tube stages
  25. ThermalTrak transistor application.
  26. weird old amp:need help
  27. Triode Electronics Mark III
  28. Scavenging a broken oscilloscope to turn it into a preamp ?
  29. Silmic caps in cathode bias. Any experience?
  30. Scott LK150 transformer
  31. With the Simple SE I lost 20lbs w/o diet or excercise and I feel great!
  32. Tube Amp / Pre-amp kit?
  33. anything that can go as a Rp.....
  34. Genelex gold lion el84 reissue - ARCING
  35. diy Ampeg preamp
  36. Bias Current Mythbuster?
  37. Exactness of feedback capacitors?
  38. 5608a
  39. You know that you are having a bad day when.......
  40. 1U5 amplifier design, Newbie
  41. 12AU7 Pre-amp Schematic Question
  42. Capacitor Question...
  43. Beam pentodes and suppressor-grid pentodes of same type
  44. Quick question about CT and FWB
  45. 46 and the Tubelab SE
  46. Frank's 6SN7 line stage / preamp with GlassWare PS-1?
  47. knobs, lights and switches?
  48. SimpleSE OP Hammond bigger than the 125ESE
  49. Speaker impedance linearisation
  50. Differential filter circuit: biasing problem
  51. Curves for 12AH7
  52. Schematic for Audio Note Japan Kassai
  53. Help with schematic understanding
  54. SEPP output transformer
  55. Fixed bias design question
  56. Strange bias circuit. WTF?
  57. 5687 preamp transformer
  58. Anyone know of a dual pentode suitable for a LTP.
  59. Output transformer current and power ratings
  60. Diodes to protect OT's..
  61. Simple SE: ???Dumb Tube Rectifier question???
  62. Speakers for tube amps
  63. Help on power supply
  64. Line output transformer question
  65. Solid vs stranded wire in amplifier circuits
  66. Screen Drive Push Pull ideas
  67. 12AT7/46 Direct Reactance Drive Amp
  68. Bridge rectifier vs Full wave rectifier
  69. Isolation Transformer Question
  70. Glow tubes as series regs ?
  71. Glow tube shunt reg stability
  72. Some interesting reading about Sweep tubes
  73. What is this?
  74. What's A "Timber bulb"?
  75. aikido/807PSE and local feedback
  76. Repairing paper in oil caps.
  77. Optoisolator compressor ideas
  78. Airgap for filament transformer ?
  79. Tube stereo for E 60 including TDA1541 cd player
  80. Bad Boy amplifier Tubelab.com style
  81. is there a typo in the Tubelab SE schematic?
  82. Theta Amp problem
  83. 12A_7 vs 6SN7EH vs EF86?
  84. Mixing two channels in the preamp or at the phase splitter?
  85. amp input cap for crossover
  86. Audio Transformer/Cathode Feedback Info
  87. Determining cathode resistor
  88. Tube Pin Schematic Question
  89. Simple SE blowing fuses
  90. Best looking tube?
  91. Identifying Stancor Power transformers
  92. HT crowbar
  93. "Bevois Valley" in triode, what to do with the feedback?
  94. Purple Glow
  95. When to use a grid leak resistor?
  96. Mcintosh MA 2275
  97. Marshall 18W clone (sort of)
  98. Cathode feedback on the simple SE
  99. Blowing output transformer
  100. Kenwood KW-44 hum
  101. Tube system for classical audio
  102. Novel method to reduce filament hum in SE Amp?
  103. Help with 6SN7 w/ CCS
  104. Fisher X-101-D
  105. best tube (not amp)
  106. Simple SE Cap and layout questions???
  107. Simple SE - one channel intermittent problem
  108. ML4/ML6 British triode
  109. transformer rubbish
  110. Identifying output transformer leads
  111. Grounding Aikido and F4
  112. Determining ratings for unknown Power Transformers
  113. Tube heaven - or tube hell?
  114. Fender "Evil Twin" Hi/Low output = same level
  115. Sub amp/speaker to compliment S5 electronics K 12 G tube amp
  116. Troubleshooting hum in 12b4 preamp.. finally almost done!!
  117. SE cathode bias question
  118. k-12G / K-12M with 4 Ohm speakers
  119. About united electron tube
  120. 6c33c-b & 6c33c-v
  121. would like a substitute for Sowter 3575-C
  122. My first tube project WIP
  123. Tube rectifiede +- supply...
  124. the buzzing from amplifiers
  125. MC prepre with submini tubes
  126. 12AU7 Preamp build
  127. Bias/ Plate dissipation question
  128. Has anyone screen driven an EL84?
  129. tube pre amp for phone stage
  130. 6080 se cathode follower
  131. Amplifier suggestions for EPA OPT please
  132. Which tube? How much power can it produce?
  133. Graaf GM20 mods - help!
  134. xpp amplifier question
  135. 520v in PP UL...?
  136. New ST-70 blowing 3 amp slow blow fuse
  137. Was There a Heathkit W-1M or WM?
  138. 8ohm speakers 4ohm tap
  139. Upgrading the Conrad Johnson Premier Fourteen preamp
  140. Noob's first build !!!!
  141. 6sf5gt ??
  142. Measuring technics practical, the allaround reference method?
  143. 2A3 or KT88 ?
  144. What to build with these tubes?
  145. line output transformer help
  146. 6L6GC Options and Flavors
  147. Chinese Buffer Amp, Useful?
  148. 6C33C SE Amp - Ideas on refinement?
  149. 6BM8 Equivalent
  150. Newbie wants to rebuild a Stromberg Carlson ASR-433
  151. RH84 questions
  152. VTL Manley 807 push pull ultra linear
  153. Seeking Pentode-Triode with a 12AX7 half...
  154. Modern tube amplifier designs?
  155. 6n6p transformer output impedance
  156. 814 triode curves
  157. Bias Question
  158. Building a variac
  159. Is my 300B tube dead?
  160. One channel quiet - any bright ideas?
  161. Saw them coming (stupid prices on ebay)
  162. EL36/6CM5 pp design critique
  163. Driving Raven R2 with tubes
  164. Does Anyone Know What This Is?
  165. Need help with tubes problem...
  166. 6V6GT push pull NFB resistor value
  167. Power cord for single ended triode
  168. Virtual chokes
  169. 12AU7 based preamp hums when output cable is touched!
  170. Possible Test equipment find.
  171. 6ak5-45
  172. Using coax for signal wiring?
  173. Chassis Plate Finish
  174. Schade84
  175. Fisher 800c selenium rectifier pictures
  176. Bass amp from spare parts
  177. Looking for tips on operating points for tubes in anode follower ...
  178. Transformer in the cathodes ??
  179. Fisher 800c static,crackle
  180. 19J6 replacement
  181. Newbie tube buffer kit
  182. Simple se parts, all needed?
  183. Any recommendations for tube for vari-mu compressor?
  184. AMC CVT 3030 Bias Procedure
  185. Cascading volumes on a 5C3 amp
  186. Anyone used a edcor cxpp100-ms-5k OT
  187. Noisy gain boost
  188. Troubleshooting hum issues with batteries?
  189. Rectifying Heater Supply
  190. tube heater over voltage!please help...
  191. rca 829b bias ? Audioromy 828
  192. 10k winding, 100k pot
  193. What is the definition of a 'good tube'?
  194. 3-stage DC-coupled Ampl
  195. 1946 Philco Tube Receiver
  196. A New Source for James Transformers
  197. Edcor Site Down? Gone? anyone know anything?
  198. Please suggest practical DIY uses for these BIG oil caps
  199. How to calculate DRD amps..
  200. PL-519 Tube - Tell me more please...
  201. Need ideas for amp with 2A3, One Electron UBT-3
  202. Favourites discrete brand for tube amp
  203. Pharmicia EPS500/400 Power supply - tube use
  204. Black Art Audio
  205. 12AX7/12BH7 Hammond Tube Preamp Project
  206. Dampen transformer endbells?
  207. Do I have DC on my AC line?
  208. GM-70 cathode feed SE amplifier
  209. Rogers cadet mk 2 newbie project experience required
  210. Mcintosh amps transformer rewinding, help needed please!
  211. Using an output tranny from a stereo for a single-ended amplifier ?
  212. 6336A Single Ended.
  213. UA 175 Urei 175
  214. Morgan Jones 5842 RIAA
  215. Question about current ratings of Hammond 300 series power transformers.
  216. Cathode Windings
  217. Phono stage for 12B4 amp [from previous thread]
  218. Looking for schematic of 26 WOT Preamp
  219. Transformer Lam Questions
  220. Schottky diode bias
  221. ACROSOUND direct-couple EL84 amplifier question
  222. RH807 CCS loaded
  223. Audio Note Kit 1 PSU question
  224. B&K 500 Tube Tester Calibration
  225. New kt88's or 6550
  226. Bias Supply resistors
  227. Incredible source for used transformers and parts!
  228. Reclaimed Hammond H100 PSU's
  229. Arc Vt-60 Cloned :-)
  230. First Time Pre Amp Build
  231. Tubelab SE 300B low level hum, help
  232. 845 - Progress so far
  233. Nube challange12AX7 to drive 6C4
  234. 7th harmonic distortion from PP pentodes depends on bias?
  235. West Output Transformers?
  236. Help me design my DAC/Line Preamp.
  237. Hybrid preamp tube problemHi,
  238. sweept tubes for simple Se recommendation?
  239. Building RH84 SE tube amp.
  240. Question - THD Measrement/Spectrum Analyzis
  241. What to do with TMC tube radio gear?
  242. Easy & Safe & Good sounding gainclone tube buffer
  243. Compactron (31AL10) Head-Scratcher
  244. blackfacing a twin
  245. What cable do you use from input socket to volume pot
  246. problem with 12AE6A buffer
  247. Adding a master volume to a Fender 5C3 Deluxe
  248. Parafeed dc blocking/coupling cap help
  249. Funky Looking 15DQ8s
  250. 12SN7 vs 7N7 bs 6SN7

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