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  1. Michaelson and Austin Oddysee
  2. 6gk6 tubes
  3. Anyone know anything about a 6AV5GA?
  4. A safe (?) DC coupled amp
  5. amp in trouble
  6. how to calculate lower operating point?
  7. Anyone on the tube forum ever heard a Bride Of Zen preamp?
  8. Audio Innovations 800 mk1
  9. Field of Dreams (a pair of FRT502 modulators)
  10. cathode follower
  11. ECC808- what is it more like?
  12. Help needed to find these rare values!
  13. New PP amp just completed - a few unusual features (long)
  14. MKP VS Electrolyte
  15. is 5mA too low???
  16. Dynaco FM3 220v-120v
  17. does plate current/voltage effect tube sound????
  18. Any opinions on the ECC81?
  19. #26 line stage help
  20. coupling caps? RTX vs Jupiter wax
  21. MC275 Hum Conundrum
  22. We91a
  23. Is 50 degrees C too hot?
  24. Using LEDs to bias grid voltage?
  25. DIY Hybride amplifiers
  26. wa i popped a tube lol
  27. 6C33C substitute
  28. Resistor popped...need help for replacement in Yaqin amp
  29. Check this eye candy out....
  30. Russian 5U4GB
  31. simple phono preamp circuit needed
  32. Black gate PS capacitors
  33. amp troubles
  34. Instruments Of Amplification - DIY
  35. my EL84 pre-amp with schematic
  36. Hammond AO29 to guitar amp?
  37. Radical (insane) PSU ideas
  38. First Tube Amp Considerations...
  39. hardcore tube night light?
  40. Frankenstein tube amp
  41. Can I use this tube?
  42. help for DHT bias in PP
  43. Multiple projects
  44. recommend operating point for EL84?
  45. First time builder, need advice.
  46. Tube Depot...
  47. schematics
  48. BOGEN MX60A Schematic
  49. Help with 1626 PSE Amp needed
  50. OTL question.
  51. diy tube amp
  52. Load line for CF
  53. DIY Vacuum tube amp
  54. Hammond or James OPT for SE 300B ?
  55. PSE 6550 schematic needed
  56. Schematic for Siemens "Table" Amplifier
  57. power supply for 6922 mu follower
  58. Dead simple tube circuit
  59. Any info on a Musical Fidelity X-Pre?
  60. Autoformer CF amp
  61. 2a3 or otl on an fullrange coral
  62. My New Project Completed
  63. SE el84
  64. Many thanks!
  65. Switching power supply & filament
  66. tube phono amp req'd
  67. Had a strange problem today...
  68. wsw siemens ultralinear 815 410 G !!?!
  69. Bottlehead Gear
  70. Amp, Stange temporary buzz, what is that?
  71. 2a3 schematic
  72. NEWBIE needs help-static in one channel of preamp
  73. Vintage speaker screw outs to 1/4" plug
  74. Flashing EL34
  75. Sovtek 2A3 tolerances / defected tube?
  76. Massive Parallel Operating
  77. filter circuit for 866a
  78. reasonable powered simple amp
  79. 6c19pi ?
  80. S5 Electronics 139 $ tube amp
  81. 12AU7 or 12AT7 instead of 12AX7 ?
  82. Tube Pre-Amp < $200
  83. Modification of 2A3 SE Circuit
  84. beta followers
  85. Q: Stereo Amp / Dual PS Chokes
  86. using Mosfets as diode in PS
  87. Sonic Frontiers Power 2SE
  88. Curcio daniel
  89. Ecc89 / Ecc189
  90. Magnavox
  91. Tube Preamp 'Clone' PCB copys on ebay (Marantz, McIntosh, etc)
  92. tube rectifier life expectancy
  93. Metal VS Glass
  94. does anybody know this transfo?
  95. need help finding tube make
  96. VTL deluxe 300 amps - adjustment question
  97. Building Marshall Plexi
  98. help converting conrad johnson MV-55 into triode!
  99. Does more tubes = more filter capacitors?
  100. 6V6 GT, Do they worth playing with them ??
  101. 12ax7 > 6sn7 > 300b
  102. calculating NFB dB
  103. PCL806 is equivalen to PCL86?
  104. anti digitalizing process
  105. Telefunken?
  106. Bogen MX30A
  107. base for amp
  108. Unbalanced - Balanced Tube Preamplifier wanted
  109. rusty iron- need help :)
  110. A new/old CCS?
  111. Rogers Cadet III - balance control
  112. Anyone tried Van Alstine's OmegaStar Bridge?
  113. Plasma/ion tweeters
  114. PP 6B4G stereo amp filament question
  115. tube tone control?
  116. trio amp up in smoke-ya really up
  117. Ideas for SE amp with this tube
  118. regulated PS - with Zener diode
  119. Filament voltage of PP2A3
  120. Dennis Boyle, Alliance Audio
  121. How do I replace this 40+ year old selenium rectifier?
  122. please advise on operating point of a 5687
  123. Output Transformer Question
  124. Stepped attenuator
  125. PP2A3 amp options
  126. Need advice: Want to learn Vacuum tubes
  127. AVO CT-160 --- Help
  128. Needed schematic....
  129. Az1 mounted on wood!
  130. Dynaco A450 specs
  131. Ecc186= SQ Ecc82
  132. tube amp kit on 230 v???
  133. some tubes
  134. ppp el84 fixed bias schematics
  135. Tube buffered NIGC trafo thoughs?
  136. driver stage
  137. PS cap placement/type
  138. Vintage OPT
  139. simple, single-ended project
  140. 6sn7 - 6bx7 - sv811-3 amp
  141. I look for a correct driver stage
  142. PCB tubes amp?
  143. XLR to 1/4" TRS?
  144. Umbilical Connector Suggestions
  145. Good Inexpensive Starter Amp Kit
  146. tube rectified preamp schematic
  147. oxygen free interconnects
  148. how to calculate feedback resistor
  149. Topaz Isolation Tranny
  150. 4E27A monster se amp??
  151. 6V6 Parafeed?
  152. Old Tranny Potting Material
  153. Brimar ECC81
  154. PCB mounting B7G sockets
  155. Directly heated cathodes, but why?
  156. SET kit for newbie
  157. High Power 805 Triode based amplifier
  158. DigitalSignalProcessing -&gt; future?
  159. 5v Damper Diode?
  160. Tubes in Class D amplifiers
  161. Universal power supply UIP-1 from former USSR schematics
  162. Building a fender twin reverb in the UK
  163. First project for Proac loudspeakers
  164. transformers
  165. cathode battery bias questions
  166. tube amp project
  167. AN DacKit 1.2 Upgrade Ideas
  168. What are the requirements for driving a 300B?
  169. 900v. 100ma. Power supply for 813 tube amplifier
  170. Chassis Internal Height / Pot Clearance
  171. Bogen help
  172. Tube tester questions
  173. 211 VT-4C Good Simple SE Schematic
  174. mosfet in regulated PS.
  175. Hammond Transformer in Toronto
  176. 6n30pi plate resistance ?
  177. balanced input stage
  178. A better triode strap?
  179. Chinese new 845
  180. what tube manufacture of 6550??
  181. Low frequency noise in a 12B4 preamp
  182. Difference between CK6528 and 6528A ?
  183. 6L6 help needed
  184. Hawksford style error correcting output
  185. SE UL OT - primary wired in reverse
  186. tube bias pot question
  187. Transformer supplier in Australia
  188. Newb here
  189. Anyone familiar with James output transformers?
  190. What Limits Freqency response in a simple tube amp like the zen?
  191. Grid driven (ETM) KT88 SE amp design - final works on paper
  192. Sansui 1000 outputs?
  193. The overlooked is often cheaper
  194. Fender 6L6 Amp... HELP!!!
  195. Tube amp design characteristics?
  196. ecc40 or 76 as driver for 2A3
  197. toroids on top of each other ?
  198. Out Of Order
  199. Pinging JAX (Sweden)
  200. Common Cathode 6922 output impedance?
  201. Blue Velvet Preamp
  202. Has anyone got any plans for a car amp?
  203. Tube Radio Kit
  204. New Tube Porn!!
  205. Need someone to host my "TUBE PORN" images.
  206. Trying to understand preamp schematic...
  207. 6C33C schematic
  208. We have liftoff!!!! Houston, all systems are go!
  209. Dynaco ST70
  210. Is Tesla still going?
  211. yet another 12b4a
  212. Tubes load resistance and output trans impedance
  213. Antique schematic help please.
  214. 12b4a wiring question
  215. $1 AMP find
  216. Heater winding load question.
  217. Direct Coupling Modulated Bias (SET)
  218. Amp with 6c33
  219. Ideas for amp rebuild...
  220. simple tube amp
  221. What's the ideal tube amplifier for me for max. $660 , maybe a kit ?
  222. CCS design help!!
  223. Proposed Transfomer/Valve Layout
  224. Mic input for guitar?
  225. My darling is giving me hell!
  226. EL84 or 6v6 or something else?
  227. Borbely hybrid phono
  228. SS power supply question
  229. RCA Tube Radio...circa 1930-40
  230. New project on 807
  231. SE design using 10k OPTs
  232. Biasing a cathode follower?
  233. Lower Distortion Alternatives to 12AT7 & 12AU7 ?
  234. Oil in Paper in oil capacitor.
  235. Valves for Crackly Fender Hot Rod
  236. Information needed
  237. Hybrid
  238. heavy metal, low power guitar amp?
  239. found two boxes of GE 6CL6 tubes
  240. Please help me compare 2 cattle of fish...
  241. Vacuum Tube Valley 6SN7 preamp
  242. SET Power Supply Regulation
  243. TubeCAD
  244. 60 Hz noise in modified Audible Illusions M2B
  245. Anodized Aluminum and Glue/Epoxy
  246. shared parts between channels
  247. May I use 5K transformer for Dynaco III amp?
  248. First amp build questions
  249. Help needed changing from srpp5814a to srpp12bh7a
  250. ok, i'll try and make it simple.

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