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  1. Line output transformer question
  2. Solid vs stranded wire in amplifier circuits
  3. Screen Drive Push Pull ideas
  4. 12AT7/46 Direct Reactance Drive Amp
  5. Bridge rectifier vs Full wave rectifier
  6. Isolation Transformer Question
  7. Glow tubes as series regs ?
  8. Glow tube shunt reg stability
  9. Some interesting reading about Sweep tubes
  10. What is this?
  11. What's A "Timber bulb"?
  12. aikido/807PSE and local feedback
  13. Repairing paper in oil caps.
  14. Optoisolator compressor ideas
  15. Airgap for filament transformer ?
  16. Tube stereo for E 60 including TDA1541 cd player
  17. Bad Boy amplifier Tubelab.com style
  18. is there a typo in the Tubelab SE schematic?
  19. Theta Amp problem
  20. 12A_7 vs 6SN7EH vs EF86?
  21. Mixing two channels in the preamp or at the phase splitter?
  22. amp input cap for crossover
  23. Audio Transformer/Cathode Feedback Info
  24. Determining cathode resistor
  25. Tube Pin Schematic Question
  26. Simple SE blowing fuses
  27. Best looking tube?
  28. Identifying Stancor Power transformers
  29. HT crowbar
  30. "Bevois Valley" in triode, what to do with the feedback?
  31. Purple Glow
  32. When to use a grid leak resistor?
  33. Mcintosh MA 2275
  34. Marshall 18W clone (sort of)
  35. Cathode feedback on the simple SE
  36. Blowing output transformer
  37. Kenwood KW-44 hum
  38. Tube system for classical audio
  39. Novel method to reduce filament hum in SE Amp?
  40. Help with 6SN7 w/ CCS
  41. Fisher X-101-D
  42. best tube (not amp)
  43. Simple SE Cap and layout questions???
  44. Simple SE - one channel intermittent problem
  45. ML4/ML6 British triode
  46. transformer rubbish
  47. Identifying output transformer leads
  48. Grounding Aikido and F4
  49. Determining ratings for unknown Power Transformers
  50. Tube heaven - or tube hell?
  51. Fender "Evil Twin" Hi/Low output = same level
  52. Sub amp/speaker to compliment S5 electronics K 12 G tube amp
  53. Troubleshooting hum in 12b4 preamp.. finally almost done!!
  54. SE cathode bias question
  55. k-12G / K-12M with 4 Ohm speakers
  56. About united electron tube
  57. 6c33c-b & 6c33c-v
  58. would like a substitute for Sowter 3575-C
  59. My first tube project WIP
  60. Tube rectifiede +- supply...
  61. the buzzing from amplifiers
  62. MC prepre with submini tubes
  63. 12AU7 Preamp build
  64. Bias/ Plate dissipation question
  65. Has anyone screen driven an EL84?
  66. tube pre amp for phone stage
  67. 6080 se cathode follower
  68. Amplifier suggestions for EPA OPT please
  69. Which tube? How much power can it produce?
  70. Graaf GM20 mods - help!
  71. xpp amplifier question
  72. 520v in PP UL...?
  73. New ST-70 blowing 3 amp slow blow fuse
  74. Was There a Heathkit W-1M or WM?
  75. 8ohm speakers 4ohm tap
  76. Upgrading the Conrad Johnson Premier Fourteen preamp
  77. Noob's first build !!!!
  78. 6sf5gt ??
  79. Measuring technics practical, the allaround reference method?
  80. 2A3 or KT88 ?
  81. What to build with these tubes?
  82. line output transformer help
  83. 6L6GC Options and Flavors
  84. Chinese Buffer Amp, Useful?
  85. 6C33C SE Amp - Ideas on refinement?
  86. 6BM8 Equivalent
  87. Newbie wants to rebuild a Stromberg Carlson ASR-433
  88. RH84 questions
  89. VTL Manley 807 push pull ultra linear
  90. Seeking Pentode-Triode with a 12AX7 half...
  91. Modern tube amplifier designs?
  92. 6n6p transformer output impedance
  93. 814 triode curves
  94. Bias Question
  95. Building a variac
  96. Is my 300B tube dead?
  97. One channel quiet - any bright ideas?
  98. Saw them coming (stupid prices on ebay)
  99. EL36/6CM5 pp design critique
  100. Driving Raven R2 with tubes
  101. Does Anyone Know What This Is?
  102. Need help with tubes problem...
  103. 6V6GT push pull NFB resistor value
  104. Power cord for single ended triode
  105. Virtual chokes
  106. 12AU7 based preamp hums when output cable is touched!
  107. Possible Test equipment find.
  108. 6ak5-45
  109. Using coax for signal wiring?
  110. Chassis Plate Finish
  111. Schade84
  112. Fisher 800c selenium rectifier pictures
  113. Bass amp from spare parts
  114. Looking for tips on operating points for tubes in anode follower ...
  115. Transformer in the cathodes ??
  116. Fisher 800c static,crackle
  117. 19J6 replacement
  118. Newbie tube buffer kit
  119. Simple se parts, all needed?
  120. Any recommendations for tube for vari-mu compressor?
  121. AMC CVT 3030 Bias Procedure
  122. Anyone used a edcor cxpp100-ms-5k OT
  123. Noisy gain boost
  124. Troubleshooting hum issues with batteries?
  125. Rectifying Heater Supply
  126. tube heater over voltage!please help...
  127. rca 829b bias ? Audioromy 828
  128. 10k winding, 100k pot
  129. What is the definition of a 'good tube'?
  130. 3-stage DC-coupled Ampl
  131. 1946 Philco Tube Receiver
  132. A New Source for James Transformers
  133. Edcor Site Down? Gone? anyone know anything?
  134. Please suggest practical DIY uses for these BIG oil caps
  135. How to calculate DRD amps..
  136. PL-519 Tube - Tell me more please...
  137. Need ideas for amp with 2A3, One Electron UBT-3
  138. Favourites discrete brand for tube amp
  139. Pharmicia EPS500/400 Power supply - tube use
  140. Black Art Audio
  141. 12AX7/12BH7 Hammond Tube Preamp Project
  142. Dampen transformer endbells?
  143. Do I have DC on my AC line?
  144. GM-70 cathode feed SE amplifier
  145. Rogers cadet mk 2 newbie project experience required
  146. Mcintosh amps transformer rewinding, help needed please!
  147. Using an output tranny from a stereo for a single-ended amplifier ?
  148. 6336A Single Ended.
  149. UA 175 Urei 175
  150. Morgan Jones 5842 RIAA
  151. Question about current ratings of Hammond 300 series power transformers.
  152. Cathode Windings
  153. Phono stage for 12B4 amp [from previous thread]
  154. Looking for schematic of 26 WOT Preamp
  155. Transformer Lam Questions
  156. Schottky diode bias
  157. ACROSOUND direct-couple EL84 amplifier question
  158. RH807 CCS loaded
  159. Audio Note Kit 1 PSU question
  160. B&K 500 Tube Tester Calibration
  161. New kt88's or 6550
  162. Bias Supply resistors
  163. Incredible source for used transformers and parts!
  164. Reclaimed Hammond H100 PSU's
  165. Arc Vt-60 Cloned :-)
  166. First Time Pre Amp Build
  167. Tubelab SE 300B low level hum, help
  168. 845 - Progress so far
  169. Nube challange12AX7 to drive 6C4
  170. 7th harmonic distortion from PP pentodes depends on bias?
  171. West Output Transformers?
  172. Help me design my DAC/Line Preamp.
  173. Hybrid preamp tube problemHi,
  174. sweept tubes for simple Se recommendation?
  175. Building RH84 SE tube amp.
  176. Question - THD Measrement/Spectrum Analyzis
  177. What to do with TMC tube radio gear?
  178. Easy & Safe & Good sounding gainclone tube buffer
  179. Compactron (31AL10) Head-Scratcher
  180. blackfacing a twin
  181. What cable do you use from input socket to volume pot
  182. problem with 12AE6A buffer
  183. Adding a master volume to a Fender 5C3 Deluxe
  184. Parafeed dc blocking/coupling cap help
  185. Funky Looking 15DQ8s
  186. 12SN7 vs 7N7 bs 6SN7
  187. Correct Pins For EL84 Triode Strap
  188. Dimensions for anode cap sizes?
  189. Mains transformer help needed please
  190. Tone Stack Challenge
  191. Aikido 6SN7 input 5687 output
  192. FRANK"S 6SN7 preamp/linestage
  193. Pentode grid question...
  194. Channel Switching
  195. Hybrid fullwave rectifier
  196. 300B stereo amp project help
  197. Another Bogen CHB 100 Conversion
  198. EdcorEurope
  199. Can AC wires induce hum in output transformers?
  200. Would you use a 4 ohm tap with these speakers?
  201. Changing grid leak bias preamp to cathode bias
  202. 304tl se amp
  203. 5687 Srpp
  204. Dumb Question Brain is numb today!
  205. What a Deal!
  206. Electrons on Parade
  207. Roll Chart for 6DJ8/6922/7308 on Philco 9100 help
  208. MeiXing MC-805AA biasing
  209. whats a good diy tube preamp kit
  210. Electrons on Parade
  211. SimpleSE parts list
  212. Matched tubes or not matched
  213. wood gnomes really do live in france
  214. Pathos Classic one
  215. A Uk supplier of valve amp kits
  216. Detached getter?
  217. 12B4 Line Stage Amp
  218. How do I control volume on Dynaco ST-70?
  219. A few questions from a total novice.
  220. RCA preamp modification
  221. Bogen Challenger CH8 conversion...newb needs help!
  222. 6AU6A - Micropowered tube amp
  223. Yet another DHT filament supply
  224. where to find 5998 ?
  225. Mcintosh MA 2275 Schematic Required
  226. Help on sonic frontier sf line 1 preamp
  227. Voice of Music Reel-Reel schematic needed
  228. Old radio tubes
  229. Alpha Pots
  230. Bleeders values and ratings
  231. Tube audio circuit analysis
  232. Audio Research LS15 circuit and description
  233. OPT Trafo
  234. OPT test data?
  235. looking for the top 6080 amp schematics
  236. vu meter
  237. Walkthrough: Pioneer SM-83 Tube Amp Restoration
  238. First Amp Build....!
  239. Will This work?
  240. Simple SE hookup wiring
  241. building a lit up tube display
  242. Push-Pull 6CL5's
  243. 2A3 power adjustments by channel
  244. Dead 12ax7 gain stage - Help...
  245. Best 300B amp schematics
  246. Stuck on Standby
  247. Newbee wants to learn about tube amps, etc...
  248. Recent Ad on Craig's List
  249. Pitfalls to warmup delay in DC coupled multiple railed amps?
  250. jan 6832 sub miniature tube

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