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  1. Experiences with White CF/CCS CF output stage
  2. Holes in the anode plate?
  3. 5687 pre?
  4. tube design literature
  5. Trace Elliott schematic
  6. tube choice?
  7. Choke identity
  8. spotted this on ebay - 700w triodes anyone?
  9. HELP!!! for tube lovers
  10. How do you properly ground a Tamura OPT?
  11. Akihabara shopping
  12. Might be interested in this distortion thread
  13. PSE Active Loaded 12B4A anyone?
  14. Set 6080/6as7
  15. solid state just isn't doing it for me!!
  16. Where can I use this tubes
  17. Interesting math conundrum.
  18. schematic from this amp 45/717a/5u4..
  19. Strange Tube
  20. power supply help!!!!
  21. se tubeamp with px4
  22. Fixed bias PP questions
  23. Identifying Eico transformers
  24. metal shield
  25. why multi pins ?
  26. 2A3 PSE 'Arcadia' by SJS, or sorta
  27. John Swenson's (In my eyes revolutionary) preamp!
  28. tube opamps
  29. Help please with rare tube cd player
  30. OT impedance problem
  31. Amperex 6DJ8
  32. tiny amp
  33. 6C33 Internal Impedance (rp)?
  34. increasing o/p impedance to match IT??
  35. Grundig TK-60 Reel to Reel Questions
  36. Michaelson and Austin Oddysee
  37. 6gk6 tubes
  38. Anyone know anything about a 6AV5GA?
  39. A safe (?) DC coupled amp
  40. amp in trouble
  41. how to calculate lower operating point?
  42. Anyone on the tube forum ever heard a Bride Of Zen preamp?
  43. Audio Innovations 800 mk1
  44. Field of Dreams (a pair of FRT502 modulators)
  45. cathode follower
  46. ECC808- what is it more like?
  47. Help needed to find these rare values!
  48. New PP amp just completed - a few unusual features (long)
  49. MKP VS Electrolyte
  50. is 5mA too low???
  51. Dynaco FM3 220v-120v
  52. does plate current/voltage effect tube sound????
  53. Any opinions on the ECC81?
  54. #26 line stage help
  55. coupling caps? RTX vs Jupiter wax
  56. MC275 Hum Conundrum
  57. We91a
  58. Is 50 degrees C too hot?
  59. Using LEDs to bias grid voltage?
  60. DIY Hybride amplifiers
  61. wa i popped a tube lol
  62. 6C33C substitute
  63. Resistor popped...need help for replacement in Yaqin amp
  64. Check this eye candy out....
  65. Russian 5U4GB
  66. simple phono preamp circuit needed
  67. Black gate PS capacitors
  68. amp troubles
  69. Instruments Of Amplification - DIY
  70. my EL84 pre-amp with schematic
  71. Radical (insane) PSU ideas
  72. First Tube Amp Considerations...
  73. hardcore tube night light?
  74. Frankenstein tube amp
  75. Can I use this tube?
  76. help for DHT bias in PP
  77. Multiple projects
  78. recommend operating point for EL84?
  79. First time builder, need advice.
  80. Tube Depot...
  81. schematics
  82. BOGEN MX60A Schematic
  83. Help with 1626 PSE Amp needed
  84. OTL question.
  85. diy tube amp
  86. Load line for CF
  87. DIY Vacuum tube amp
  88. Hammond or James OPT for SE 300B ?
  89. PSE 6550 schematic needed
  90. Schematic for Siemens "Table" Amplifier
  91. power supply for 6922 mu follower
  92. Dead simple tube circuit
  93. Any info on a Musical Fidelity X-Pre?
  94. Autoformer CF amp
  95. 2a3 or otl on an fullrange coral
  96. My New Project Completed
  97. SE el84
  98. Many thanks!
  99. Switching power supply & filament
  100. tube phono amp req'd
  101. Had a strange problem today...
  102. wsw siemens ultralinear 815 410 G !!?!
  103. Bottlehead Gear
  104. Amp, Stange temporary buzz, what is that?
  105. 2a3 schematic
  106. NEWBIE needs help-static in one channel of preamp
  107. Vintage speaker screw outs to 1/4" plug
  108. Flashing EL34
  109. Sovtek 2A3 tolerances / defected tube?
  110. Massive Parallel Operating
  111. filter circuit for 866a
  112. reasonable powered simple amp
  113. 6c19pi ?
  114. S5 Electronics 139 $ tube amp
  115. 12AU7 or 12AT7 instead of 12AX7 ?
  116. Tube Pre-Amp < $200
  117. Modification of 2A3 SE Circuit
  118. beta followers
  119. Q: Stereo Amp / Dual PS Chokes
  120. using Mosfets as diode in PS
  121. Sonic Frontiers Power 2SE
  122. Curcio daniel
  123. Ecc89 / Ecc189
  124. Magnavox
  125. Tube Preamp 'Clone' PCB copys on ebay (Marantz, McIntosh, etc)
  126. tube rectifier life expectancy
  127. Metal VS Glass
  128. does anybody know this transfo?
  129. need help finding tube make
  130. VTL deluxe 300 amps - adjustment question
  131. help converting conrad johnson MV-55 into triode!
  132. Does more tubes = more filter capacitors?
  133. 6V6 GT, Do they worth playing with them ??
  134. 12ax7 > 6sn7 > 300b
  135. calculating NFB dB
  136. PCL806 is equivalen to PCL86?
  137. anti digitalizing process
  138. Telefunken?
  139. Bogen MX30A
  140. base for amp
  141. Unbalanced - Balanced Tube Preamplifier wanted
  142. rusty iron- need help :)
  143. A new/old CCS?
  144. Rogers Cadet III - balance control
  145. Anyone tried Van Alstine's OmegaStar Bridge?
  146. Plasma/ion tweeters
  147. PP 6B4G stereo amp filament question
  148. tube tone control?
  149. trio amp up in smoke-ya really up
  150. Ideas for SE amp with this tube
  151. regulated PS - with Zener diode
  152. Filament voltage of PP2A3
  153. Dennis Boyle, Alliance Audio
  154. How do I replace this 40+ year old selenium rectifier?
  155. please advise on operating point of a 5687
  156. Output Transformer Question
  157. Stepped attenuator
  158. PP2A3 amp options
  159. Need advice: Want to learn Vacuum tubes
  160. AVO CT-160 --- Help
  161. Needed schematic....
  162. Az1 mounted on wood!
  163. Dynaco A450 specs
  164. Ecc186= SQ Ecc82
  165. tube amp kit on 230 v???
  166. some tubes
  167. ppp el84 fixed bias schematics
  168. Tube buffered NIGC trafo thoughs?
  169. driver stage
  170. PS cap placement/type
  171. Vintage OPT
  172. simple, single-ended project
  173. 6sn7 - 6bx7 - sv811-3 amp
  174. I look for a correct driver stage
  175. PCB tubes amp?
  176. XLR to 1/4" TRS?
  177. Umbilical Connector Suggestions
  178. Good Inexpensive Starter Amp Kit
  179. tube rectified preamp schematic
  180. oxygen free interconnects
  181. how to calculate feedback resistor
  182. Topaz Isolation Tranny
  183. 4E27A monster se amp??
  184. 6V6 Parafeed?
  185. Old Tranny Potting Material
  186. Brimar ECC81
  187. PCB mounting B7G sockets
  188. Directly heated cathodes, but why?
  189. SET kit for newbie
  190. High Power 805 Triode based amplifier
  191. DigitalSignalProcessing -&gt; future?
  192. 5v Damper Diode?
  193. Tubes in Class D amplifiers
  194. Universal power supply UIP-1 from former USSR schematics
  195. First project for Proac loudspeakers
  196. transformers
  197. cathode battery bias questions
  198. tube amp project
  199. AN DacKit 1.2 Upgrade Ideas
  200. What are the requirements for driving a 300B?
  201. 900v. 100ma. Power supply for 813 tube amplifier
  202. Chassis Internal Height / Pot Clearance
  203. Bogen help
  204. Tube tester questions
  205. 211 VT-4C Good Simple SE Schematic
  206. mosfet in regulated PS.
  207. Hammond Transformer in Toronto
  208. 6n30pi plate resistance ?
  209. balanced input stage
  210. A better triode strap?
  211. Chinese new 845
  212. what tube manufacture of 6550??
  213. Low frequency noise in a 12B4 preamp
  214. Difference between CK6528 and 6528A ?
  215. 6L6 help needed
  216. Hawksford style error correcting output
  217. SE UL OT - primary wired in reverse
  218. tube bias pot question
  219. Transformer supplier in Australia
  220. Newb here
  221. Anyone familiar with James output transformers?
  222. What Limits Freqency response in a simple tube amp like the zen?
  223. Grid driven (ETM) KT88 SE amp design - final works on paper
  224. Sansui 1000 outputs?
  225. The overlooked is often cheaper
  226. Tube amp design characteristics?
  227. ecc40 or 76 as driver for 2A3
  228. toroids on top of each other ?
  229. Out Of Order
  230. Pinging JAX (Sweden)
  231. Common Cathode 6922 output impedance?
  232. Blue Velvet Preamp
  233. Has anyone got any plans for a car amp?
  234. Tube Radio Kit
  235. New Tube Porn!!
  236. Need someone to host my "TUBE PORN" images.
  237. Trying to understand preamp schematic...
  238. 6C33C schematic
  239. We have liftoff!!!! Houston, all systems are go!
  240. Dynaco ST70
  241. Is Tesla still going?
  242. yet another 12b4a
  243. Tubes load resistance and output trans impedance
  244. Antique schematic help please.
  245. 12b4a wiring question
  246. $1 AMP find
  247. Heater winding load question.
  248. Direct Coupling Modulated Bias (SET)
  249. Amp with 6c33
  250. Ideas for amp rebuild...

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