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  1. What is the definition of a 'good tube'?
  2. 3-stage DC-coupled Ampl
  3. 1946 Philco Tube Receiver
  4. A New Source for James Transformers
  5. Edcor Site Down? Gone? anyone know anything?
  6. Please suggest practical DIY uses for these BIG oil caps
  7. How to calculate DRD amps..
  8. PL-519 Tube - Tell me more please...
  9. Need ideas for amp with 2A3, One Electron UBT-3
  10. Favourites discrete brand for tube amp
  11. Pharmicia EPS500/400 Power supply - tube use
  12. Black Art Audio
  13. 12AX7/12BH7 Hammond Tube Preamp Project
  14. Dampen transformer endbells?
  15. Do I have DC on my AC line?
  16. GM-70 cathode feed SE amplifier
  17. Rogers cadet mk 2 newbie project experience required
  18. Mcintosh amps transformer rewinding, help needed please!
  19. Using an output tranny from a stereo for a single-ended amplifier ?
  20. 6336A Single Ended.
  21. UA 175 Urei 175
  22. Morgan Jones 5842 RIAA
  23. Question about current ratings of Hammond 300 series power transformers.
  24. Cathode Windings
  25. Phono stage for 12B4 amp [from previous thread]
  26. Looking for schematic of 26 WOT Preamp
  27. Transformer Lam Questions
  28. Schottky diode bias
  29. ACROSOUND direct-couple EL84 amplifier question
  30. RH807 CCS loaded
  31. Audio Note Kit 1 PSU question
  32. B&K 500 Tube Tester Calibration
  33. New kt88's or 6550
  34. Bias Supply resistors
  35. Incredible source for used transformers and parts!
  36. Reclaimed Hammond H100 PSU's
  37. Arc Vt-60 Cloned :-)
  38. First Time Pre Amp Build
  39. Tubelab SE 300B low level hum, help
  40. 845 - Progress so far
  41. Nube challange12AX7 to drive 6C4
  42. 7th harmonic distortion from PP pentodes depends on bias?
  43. West Output Transformers?
  44. Help me design my DAC/Line Preamp.
  45. Hybrid preamp tube problemHi,
  46. sweept tubes for simple Se recommendation?
  47. Building RH84 SE tube amp.
  48. Question - THD Measrement/Spectrum Analyzis
  49. What to do with TMC tube radio gear?
  50. Easy & Safe & Good sounding gainclone tube buffer
  51. Compactron (31AL10) Head-Scratcher
  52. blackfacing a twin
  53. What cable do you use from input socket to volume pot
  54. problem with 12AE6A buffer
  55. Adding a master volume to a Fender 5C3 Deluxe
  56. Parafeed dc blocking/coupling cap help
  57. Funky Looking 15DQ8s
  58. 12SN7 vs 7N7 bs 6SN7
  59. Correct Pins For EL84 Triode Strap
  60. Dimensions for anode cap sizes?
  61. Mains transformer help needed please
  62. Tone Stack Challenge
  63. Aikido 6SN7 input 5687 output
  64. FRANK"S 6SN7 preamp/linestage
  65. Pentode grid question...
  66. Channel Switching
  67. Hybrid fullwave rectifier
  68. 300B stereo amp project help
  69. Another Bogen CHB 100 Conversion
  70. EdcorEurope
  71. Can AC wires induce hum in output transformers?
  72. Would you use a 4 ohm tap with these speakers?
  73. Changing grid leak bias preamp to cathode bias
  74. 304tl se amp
  75. 5687 Srpp
  76. Dumb Question Brain is numb today!
  77. What a Deal!
  78. Electrons on Parade
  79. Roll Chart for 6DJ8/6922/7308 on Philco 9100 help
  80. MeiXing MC-805AA biasing
  81. whats a good diy tube preamp kit
  82. Electrons on Parade
  83. SimpleSE parts list
  84. Matched tubes or not matched
  85. wood gnomes really do live in france
  86. Pathos Classic one
  87. A Uk supplier of valve amp kits
  88. Detached getter?
  89. 12B4 Line Stage Amp
  90. How do I control volume on Dynaco ST-70?
  91. A few questions from a total novice.
  92. RCA preamp modification
  93. Bogen Challenger CH8 conversion...newb needs help!
  94. 6AU6A - Micropowered tube amp
  95. Yet another DHT filament supply
  96. where to find 5998 ?
  97. Mcintosh MA 2275 Schematic Required
  98. Help on sonic frontier sf line 1 preamp
  99. Voice of Music Reel-Reel schematic needed
  100. Old radio tubes
  101. 6KN6-PP-guitar slave
  102. Alpha Pots
  103. Bleeders values and ratings
  104. Tube audio circuit analysis
  105. Audio Research LS15 circuit and description
  106. OPT Trafo
  107. OPT test data?
  108. looking for the top 6080 amp schematics
  109. vu meter
  110. Walkthrough: Pioneer SM-83 Tube Amp Restoration
  111. First Amp Build....!
  112. Will This work?
  113. Simple SE hookup wiring
  114. building a lit up tube display
  115. Push-Pull 6CL5's
  116. 2A3 power adjustments by channel
  117. Dead 12ax7 gain stage - Help...
  118. Best 300B amp schematics
  119. Stuck on Standby
  120. Newbee wants to learn about tube amps, etc...
  121. Recent Ad on Craig's List
  122. Pitfalls to warmup delay in DC coupled multiple railed amps?
  123. jan 6832 sub miniature tube
  124. Anti-Triode SEPP, how to do best?
  125. Some Help with Feedback Please!
  126. Cary 300SEI, likely capacitor failure
  127. Ballast Tube Current Source
  128. Ray Lumley m100 schematic needed
  129. Feedback question
  130. CMRR from parallel heaters?
  131. bevois valley clone from eico hf-12 iron..
  132. 27/37/56/76 plate dissipation
  133. Bell 2420 Amplifier Schematic Needed...
  134. How It Works Video
  135. Quad II build for guitar
  136. Have I got this right?
  137. any simple circuits I can add to a dac?
  138. neg feed back into v/slope stereo 2 pre-amp
  139. Using 12AX7 as input with feedback
  140. My first power supply
  141. Unknown tube similar to px4
  142. Anyone know of some ridiculously powerful triodes for class A useage?
  143. Bias Voltage
  144. Looking for tubes in Germany
  145. Substituting GU50 tubes for KT88
  146. Parts mined from an AKAI 1800L, what to do?
  147. Has anyone built this amp??????
  148. Another TubeLab SimpleSE Build
  149. Output transformers bandwidth/frequency range
  150. 6g6 preamp B+ at 400+????
  151. Which power supply would you use?
  152. Mullard Articles
  153. SimpleSE - motor run cap specs
  154. Can I reverse leads on an OT?
  155. 9 pin version of a 6SJ7?
  156. 6550 stock ?
  157. Fisher Tube Tuner Restoration Walkthrough
  158. Futterman H-3
  159. simple 6080/6as7 ppp/circlotron project
  160. My unbalanced preamp problem
  161. Gu50
  162. Any Simple CX310 SE schematics around?
  163. Peavey "Super Festival" VTA-400 - upgrading to 400W?
  164. Two EI Power Transformers Orientation?
  165. Question on Hybrid Bridge using 5AR4
  166. Recommend a project for a n00b
  167. Help! el34 8pin to 7pin conversion
  168. Converting Yarland FV-34AIII to Triode and Zero NF
  169. 5U4GB PS question
  170. 6X8 Pentode/Triode Musings
  171. DDD mfg co High Voltage power supply?
  172. Mistake on OPT connections : have I damaged something ?
  173. Looking for Jim Morrison Siren Song preamp schematic
  174. cap question....
  175. Ming Da MC368-B90
  176. single tube to drive 300ohm headphones
  177. Negative Feedback?
  178. Capacitor voltage ratings
  179. Possible to convert an oscilloscope into a tube amp?
  180. "Junkbox" 2A5 SE
  181. Power supply testing
  182. Tubeamp power supply - LC question
  183. tube amp coupling cap - audiospace
  184. Radford pentode-triode LTP splitter
  185. Tube bias testers, your opinions, please.
  186. Just saw this and thought I'd pass it along. . .
  187. 6KG6-EL509-EL519 Schematics wanted
  188. Difference between SE output transformer and push-pull output transformers
  189. Sourcing OPTs in Australia
  190. Is there a LOCTAL equiv to a 6V6?
  191. 10m45s LTspice model
  192. What circuit and tube to be used
  193. experimental 6L6G / 6BG6G amp design brainstorm
  194. 29GK6 heater current?
  195. Bench PS: stacking DC supplies
  196. Mr Liung schematics
  197. Want to build tube amp
  198. Runaway bias on Hot Rod Deville
  199. Back to back transformers.
  200. Using Battery for 300v B+ ?
  201. Anyone recognice this RIAA?
  202. Power cord replacement
  203. Negative LTP CCS supply
  204. c-j pre amp blowing tubes?
  205. first amp build
  206. Tube Mic Preamp - which Edcor transformer?
  207. Scaling the SLCF for other voltage - help
  208. Question about Allied & Hammond Power Transformer Ratings
  209. Education
  210. Tubelab SE with a 6BX7 to drive 845s
  211. Bias Ground
  212. Suggestions for RIAA preamp?
  213. External Test Points
  214. b2spice model request
  215. 12aY 7 preamp out
  216. 3B7 Loctal DHT
  217. Aikido All in One line stage amp PCB
  218. SS power supply.
  219. 6AU6 pentodes
  220. Parafeed with NP electrolytic?
  221. Charlie K - RIP
  222. Need some advise with a hum problem
  223. What resistor should I use?
  224. IN18 nixies
  225. Tubelab SE build and power supply questions.
  226. Quality of S5's K-12G in proposed system
  227. Gibson EH 150 restoration
  228. Transformer volume control questions.
  229. Power transformer star ground
  230. Shielding and chassis
  231. Side project - d3a and 6c41c
  232. Cathode-heater leakage
  233. Bell 2122 volume drop off
  234. -500V Maida regulator inquiry
  235. 7591 is glowing RED
  236. Hum problem
  237. Need PS schematic for Musical Machine
  238. Polystyrene capacitor as coupling in output tube stages
  239. Help needed with 10M45S integration .
  240. Ultrasonic Cleaning??????
  241. The daunting world of tubes (where to start)
  242. help 124.3 vac
  243. Bat VK3i buzzing noise
  244. Audioromy FU13 (813) diagram and mods
  245. any complete schematic for 6ak5?
  246. Weird fuzz from Aikido Pre, HELP!
  247. Question about tube amplifier.
  248. 811a rating question
  249. Anode chokes DIY?
  250. EI laminations in Europe

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