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  1. Any opinions on the ECC81?
  2. #26 line stage help
  3. MC275 Hum Conundrum
  4. We91a
  5. Is 50 degrees C too hot?
  6. Using LEDs to bias grid voltage?
  7. DIY Hybride amplifiers
  8. wa i popped a tube lol
  9. 6C33C substitute
  10. Resistor popped...need help for replacement in Yaqin amp
  11. Check this eye candy out....
  12. Russian 5U4GB
  13. simple phono preamp circuit needed
  14. amp troubles
  15. Instruments Of Amplification - DIY
  16. my EL84 pre-amp with schematic
  17. Radical (insane) PSU ideas
  18. First Tube Amp Considerations...
  19. hardcore tube night light?
  20. Frankenstein tube amp
  21. Can I use this tube?
  22. help for DHT bias in PP
  23. Multiple projects
  24. recommend operating point for EL84?
  25. First time builder, need advice.
  26. Tube Depot...
  27. schematics
  28. BOGEN MX60A Schematic
  29. Help with 1626 PSE Amp needed
  30. OTL question.
  31. diy tube amp
  32. Load line for CF
  33. DIY Vacuum tube amp
  34. Hammond or James OPT for SE 300B ?
  35. PSE 6550 schematic needed
  36. Schematic for Siemens "Table" Amplifier
  37. power supply for 6922 mu follower
  38. Dead simple tube circuit
  39. Any info on a Musical Fidelity X-Pre?
  40. Autoformer CF amp
  41. 2a3 or otl on an fullrange coral
  42. My New Project Completed
  43. SE el84
  44. Many thanks!
  45. Switching power supply & filament
  46. tube phono amp req'd
  47. Had a strange problem today...
  48. wsw siemens ultralinear 815 410 G !!?!
  49. Bottlehead Gear
  50. Amp, Stange temporary buzz, what is that?
  51. 2a3 schematic
  52. NEWBIE needs help-static in one channel of preamp
  53. Vintage speaker screw outs to 1/4" plug
  54. Flashing EL34
  55. Sovtek 2A3 tolerances / defected tube?
  56. Massive Parallel Operating
  57. reasonable powered simple amp
  58. 6c19pi ?
  59. S5 Electronics 139 $ tube amp
  60. 12AU7 or 12AT7 instead of 12AX7 ?
  61. Tube Pre-Amp < $200
  62. Modification of 2A3 SE Circuit
  63. beta followers
  64. Q: Stereo Amp / Dual PS Chokes
  65. using Mosfets as diode in PS
  66. Sonic Frontiers Power 2SE
  67. Curcio Daniel
  68. Ecc89 / Ecc189
  69. Magnavox
  70. Tube Preamp 'Clone' PCB copys on ebay (Marantz, McIntosh, etc)
  71. tube rectifier life expectancy
  72. Metal VS Glass
  73. does anybody know this transfo?
  74. need help finding tube make
  75. VTL deluxe 300 amps - adjustment question
  76. help converting conrad johnson MV-55 into triode!
  77. Does more tubes = more filter capacitors?
  78. 6V6 GT, Do they worth playing with them ??
  79. 12ax7 > 6sn7 > 300b
  80. calculating NFB dB
  81. PCL806 is equivalen to PCL86?
  82. anti digitalizing process
  83. Telefunken?
  84. Bogen MX30A
  85. base for amp
  86. Unbalanced - Balanced Tube Preamplifier wanted
  87. rusty iron- need help :)
  88. A new/old CCS?
  89. Rogers Cadet III - balance control
  90. Anyone tried Van Alstine's OmegaStar Bridge?
  91. Plasma/ion tweeters
  92. PP 6B4G stereo amp filament question
  93. tube tone control?
  94. trio amp up in smoke-ya really up
  95. Ideas for SE amp with this tube
  96. regulated PS - with Zener diode
  97. Filament voltage of PP2A3
  98. Dennis Boyle, Alliance Audio
  99. How do I replace this 40+ year old selenium rectifier?
  100. please advise on operating point of a 5687
  101. Output Transformer Question
  102. Stepped attenuator
  103. PP2A3 amp options
  104. Need advice: Want to learn Vacuum tubes
  105. Needed schematic....
  106. Az1 mounted on wood!
  107. Dynaco A450 specs
  108. Ecc186= SQ Ecc82
  109. tube amp kit on 230 v???
  110. some tubes
  111. ppp el84 fixed bias schematics
  112. Tube buffered NIGC trafo thoughs?
  113. driver stage
  114. PS cap placement/type
  115. Vintage OPT
  116. simple, single-ended project
  117. 6sn7 - 6bx7 - sv811-3 amp
  118. I look for a correct driver stage
  119. PCB tubes amp?
  120. XLR to 1/4" TRS?
  121. Umbilical Connector Suggestions
  122. Good Inexpensive Starter Amp Kit
  123. tube rectified preamp schematic
  124. oxygen free interconnects
  125. how to calculate feedback resistor
  126. Topaz Isolation Tranny
  127. 4E27A monster se amp??
  128. 6V6 Parafeed?
  129. Old Tranny Potting Material
  130. Brimar ECC81
  131. PCB mounting B7G sockets
  132. Directly heated cathodes, but why?
  133. SET kit for newbie
  134. High Power 805 Triode based amplifier
  135. DigitalSignalProcessing -&gt; future?
  136. 5v Damper Diode?
  137. Tubes in Class D amplifiers
  138. First project for Proac loudspeakers
  139. transformers
  140. cathode battery bias questions
  141. tube amp project
  142. AN DacKit 1.2 Upgrade Ideas
  143. What are the requirements for driving a 300B?
  144. 900v. 100ma. Power supply for 813 tube amplifier
  145. Chassis Internal Height / Pot Clearance
  146. Bogen help
  147. 211 VT-4C Good Simple SE Schematic
  148. mosfet in regulated PS.
  149. Hammond Transformer in Toronto
  150. 6n30pi plate resistance ?
  151. balanced input stage
  152. A better triode strap?
  153. Chinese new 845
  154. what tube manufacture of 6550??
  155. Low frequency noise in a 12B4 preamp
  156. Difference between CK6528 and 6528A ?
  157. 6L6 help needed
  158. Hawksford style error correcting output
  159. SE UL OT - primary wired in reverse
  160. tube bias pot question
  161. Transformer supplier in Australia
  162. Newb here
  163. Anyone familiar with James output transformers?
  164. What Limits Freqency response in a simple tube amp like the zen?
  165. Grid driven (ETM) KT88 SE amp design - final works on paper
  166. Sansui 1000 outputs?
  167. The overlooked is often cheaper
  168. Tube amp design characteristics?
  169. ecc40 or 76 as driver for 2A3
  170. toroids on top of each other ?
  171. Out Of Order
  172. Pinging JAX (Sweden)
  173. Common Cathode 6922 output impedance?
  174. Blue Velvet Preamp
  175. Has anyone got any plans for a car amp?
  176. Tube Radio Kit
  177. New Tube Porn!!
  178. Need someone to host my "TUBE PORN" images.
  179. Trying to understand preamp schematic...
  180. 6C33C schematic
  181. We have liftoff!!!! Houston, all systems are go!
  182. Dynaco ST70
  183. Is Tesla still going?
  184. yet another 12b4a
  185. Tubes load resistance and output trans impedance
  186. Antique schematic help please.
  187. 12b4a wiring question
  188. $1 AMP find
  189. Heater winding load question.
  190. Direct Coupling Modulated Bias (SET)
  191. Amp with 6c33
  192. Ideas for amp rebuild...
  193. simple tube amp
  194. What's the ideal tube amplifier for me for max. $660 , maybe a kit ?
  195. CCS design help!!
  196. Proposed Transfomer/Valve Layout
  197. My darling is giving me hell!
  198. EL84 or 6v6 or something else?
  199. Borbely hybrid phono
  200. SS power supply question
  201. RCA Tube Radio...circa 1930-40
  202. New project on 807
  203. SE design using 10k OPTs
  204. Biasing a cathode follower?
  205. Lower Distortion Alternatives to 12AT7 & 12AU7 ?
  206. Information needed
  207. Hybrid
  208. found two boxes of GE 6CL6 tubes
  209. Please help me compare 2 cattle of fish...
  210. Vacuum Tube Valley 6SN7 preamp
  211. SET Power Supply Regulation
  212. TubeCAD
  213. 60 Hz noise in modified Audible Illusions M2B
  214. Anodized Aluminum and Glue/Epoxy
  215. shared parts between channels
  216. May I use 5K transformer for Dynaco III amp?
  217. First amp build questions
  218. Help needed changing from srpp5814a to srpp12bh7a
  219. ok, i'll try and make it simple.
  220. Sure, copy an amp. . . It'd work but I'm looking for something different.
  221. Half a bee Philosophically. . . Er sorry Its actually about ECC83 amps
  222. Bogan schematic for HO 50 power Amp
  223. Can VT-185 be applied in audio circuit?
  224. Best PP transformer for 2A3 amp?
  225. help in finding tubetester meter value
  226. B+ Voltage
  227. CCS Conceptual Qs, Using Gary Pimm CCS as Example
  228. Is there a no/gain preamplifier schematic using high-distortion EC90?
  229. Klystron??
  230. single ended 2a3 project
  231. Visit Shuguang tube factory(many pics)
  232. AKAI M8 Tube R-R input problem
  233. How do Sovtek 6L6WGCs stand up?
  234. Hammond SE Transformer question
  235. Tube Safety
  236. old console
  237. AB1 or 2?
  238. help with restoring amp
  239. Tube preamplifier with PCC88
  240. Tube amplifier 300b proyect
  241. linestage needed
  242. 5687 Tube - best choice
  243. Fisher 500c - Trouble shooting tuner section
  244. Morgan Jones book to swap
  245. gu-48 PP
  246. Taylor 45b Gm Problem
  247. 5687, ECC99, 7119, or E182CC??
  248. Bell Sound Systems Old Gem
  249. Mu-follower current capability?
  250. Filaments voltage question

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