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  1. rca83 rectifier precautions
  2. Multi chassis grounding scheme.
  3. 717a Datasheet
  4. 12B4 Battery Bias from (Preamp: Foreplay or 5687 or 12B4 )
  5. Need Six-pac amp schematic
  6. Any clue of how to use this part as a current sink for a CF?
  7. Tweeks on tubes - bring out the demagnetiserss
  8. Absolute. Best. Chassis. Ever.
  9. Zout adapted for 2 EL34 80W Va=560V
  10. load line - truth or fiction
  11. Best place to place bleeder resistor in a power supply?
  12. Pretty Tubes
  13. Preamp: Foreplay or 5687 or 12B4
  14. want to make otl with 6 tung-sol 6336a
  15. 6L6'S vs EL34's
  16. What can you tell me about Halldorson transformers
  17. CROFT OTL (APPARITION MODEL) Schematics
  18. Is there a 'Gainclone' Of the tube world?
  19. Line Amp Design review
  20. Looking for a very special project
  21. Designing a LC power supply
  22. psu caps
  23. Easiest CAD to learn to layout my chassis?
  24. newbie asks question :cathode biasing
  25. mr. pimm's ccs rev.3?
  26. Audio Research LS22 - Looking for schematics
  27. Beard P100
  28. shunt regulation??
  29. Vitamin Q VS Jensen
  30. Mystery Russian tube logo ?
  31. Counterpoint SA-7 Schematic
  32. Dual rectification off single sencondary transformer question
  33. Which preamp to choose for my ECC88s?
  34. looking for morgan jones phono amp schematic
  35. Amp for a beginner
  36. Question about direct coupling a anode follower into a cathode follower.
  37. On Line Tube Learning for newbies....
  38. EL34 Vs. EL84.......
  39. New DHT heater
  40. A Career in Tube Audio?
  41. Xicon Polypropylene Cap for Valve Amp
  42. ECC99 Heater / Cathode Max Volt
  43. Replacing Tubes
  44. schematics wanted please
  45. MCUTracer -- the missing code
  46. How do you double the voltage on a PSU?
  47. EL34 tubes to Proboi M50 amp
  48. ATH-W1000 headphones need amplifier
  49. g. pimm's rev3. and rev. 4 -6P1P/5687 ???
  50. DIY Power Brake?
  51. New EL84 SE schemat.
  52. 32 NOS RCA 1644 (12L6-GT) Twin Pentode tubes
  53. reducing hum
  54. Lafayette LA-224
  55. Comments on RSD Tubes
  56. Tube heatsink
  57. wondering about direction
  58. An Ultra -linear question
  59. 5687 Preamp as I plan to build it.
  60. Hoekstra DC-Coupled 300B ... oooooh!
  61. 5687_6n1p_6p1p_gary pimm
  62. How lucky are we? TJ type 50 triode to be made. Make your preferences known now!
  63. Biasing DC heaters
  64. EL34 SE amp schematics
  65. Negative Voltage with Tube Rectification?
  66. Tube Amp on eBay
  67. Experiences with White CF/CCS CF output stage
  68. Holes in the anode plate?
  69. 5687 pre?
  70. tube design literature
  71. Trace Elliott schematic
  72. tube choice?
  73. Choke identity
  74. spotted this on ebay - 700w triodes anyone?
  75. HELP!!! for tube lovers
  76. How do you properly ground a Tamura OPT?
  77. Akihabara shopping
  78. Might be interested in this distortion thread
  79. PSE Active Loaded 12B4A anyone?
  80. Set 6080/6as7
  81. solid state just isn't doing it for me!!
  82. Where can I use this tubes
  83. Interesting math conundrum.
  84. schematic from this amp 45/717a/5u4..
  85. Strange Tube
  86. power supply help!!!!
  87. se tubeamp with px4
  88. Fixed bias PP questions
  89. Identifying Eico transformers
  90. metal shield
  91. why multi pins ?
  92. 2A3 PSE 'Arcadia' by SJS, or sorta
  93. John Swenson's (In my eyes revolutionary) preamp!
  94. tube opamps
  95. Help please with rare tube cd player
  96. OT impedance problem
  97. Amperex 6DJ8
  98. tiny amp
  99. 6C33 Internal Impedance (rp)?
  100. increasing o/p impedance to match IT??
  101. Grundig TK-60 Reel to Reel Questions
  102. Michaelson and Austin Oddysee
  103. 6gk6 tubes
  104. Anyone know anything about a 6AV5GA?
  105. A safe (?) DC coupled amp
  106. amp in trouble
  107. how to calculate lower operating point?
  108. Anyone on the tube forum ever heard a Bride Of Zen preamp?
  109. Audio Innovations 800 mk1
  110. Field of Dreams (a pair of FRT502 modulators)
  111. cathode follower
  112. ECC808- what is it more like?
  113. Help needed to find these rare values!
  114. New PP amp just completed - a few unusual features (long)
  115. MKP VS Electrolyte
  116. is 5mA too low???
  117. Dynaco FM3 220v-120v
  118. does plate current/voltage effect tube sound????
  119. Any opinions on the ECC81?
  120. #26 line stage help
  121. coupling caps? RTX vs Jupiter wax
  122. MC275 Hum Conundrum
  123. We91a
  124. Is 50 degrees C too hot?
  125. Using LEDs to bias grid voltage?
  126. DIY Hybride amplifiers
  127. wa i popped a tube lol
  128. 6C33C substitute
  129. Resistor popped...need help for replacement in Yaqin amp
  130. Check this eye candy out....
  131. Russian 5U4GB
  132. simple phono preamp circuit needed
  133. Black gate PS capacitors
  134. amp troubles
  135. Instruments Of Amplification - DIY
  136. my EL84 pre-amp with schematic
  137. Hammond AO29 to guitar amp?
  138. Radical (insane) PSU ideas
  139. First Tube Amp Considerations...
  140. hardcore tube night light?
  141. Frankenstein tube amp
  142. Can I use this tube?
  143. help for DHT bias in PP
  144. Multiple projects
  145. recommend operating point for EL84?
  146. First time builder, need advice.
  147. Tube Depot...
  148. schematics
  149. BOGEN MX60A Schematic
  150. Help with 1626 PSE Amp needed
  151. OTL question.
  152. diy tube amp
  153. Load line for CF
  154. DIY Vacuum tube amp
  155. Hammond or James OPT for SE 300B ?
  156. PSE 6550 schematic needed
  157. Schematic for Siemens "Table" Amplifier
  158. power supply for 6922 mu follower
  159. Dead simple tube circuit
  160. Any info on a Musical Fidelity X-Pre?
  161. Autoformer CF amp
  162. 2a3 or otl on an fullrange coral
  163. My New Project Completed
  164. SE el84
  165. Many thanks!
  166. Switching power supply & filament
  167. tube phono amp req'd
  168. Had a strange problem today...
  169. wsw siemens ultralinear 815 410 G !!?!
  170. Bottlehead Gear
  171. Amp, Stange temporary buzz, what is that?
  172. 2a3 schematic
  173. NEWBIE needs help-static in one channel of preamp
  174. Vintage speaker screw outs to 1/4" plug
  175. Flashing EL34
  176. Sovtek 2A3 tolerances / defected tube?
  177. Massive Parallel Operating
  178. filter circuit for 866a
  179. reasonable powered simple amp
  180. 6c19pi ?
  181. S5 Electronics 139 $ tube amp
  182. 12AU7 or 12AT7 instead of 12AX7 ?
  183. Tube Pre-Amp < $200
  184. Modification of 2A3 SE Circuit
  185. beta followers
  186. Q: Stereo Amp / Dual PS Chokes
  187. using Mosfets as diode in PS
  188. Sonic Frontiers Power 2SE
  189. Curcio daniel
  190. Ecc89 / Ecc189
  191. Magnavox
  192. Tube Preamp 'Clone' PCB copys on ebay (Marantz, McIntosh, etc)
  193. tube rectifier life expectancy
  194. Metal VS Glass
  195. does anybody know this transfo?
  196. need help finding tube make
  197. VTL deluxe 300 amps - adjustment question
  198. Building Marshall Plexi
  199. help converting conrad johnson MV-55 into triode!
  200. Does more tubes = more filter capacitors?
  201. 6V6 GT, Do they worth playing with them ??
  202. 12ax7 > 6sn7 > 300b
  203. calculating NFB dB
  204. PCL806 is equivalen to PCL86?
  205. anti digitalizing process
  206. Telefunken?
  207. Bogen MX30A
  208. base for amp
  209. Unbalanced - Balanced Tube Preamplifier wanted
  210. rusty iron- need help :)
  211. A new/old CCS?
  212. Rogers Cadet III - balance control
  213. Anyone tried Van Alstine's OmegaStar Bridge?
  214. Plasma/ion tweeters
  215. PP 6B4G stereo amp filament question
  216. tube tone control?
  217. trio amp up in smoke-ya really up
  218. Ideas for SE amp with this tube
  219. regulated PS - with Zener diode
  220. Filament voltage of PP2A3
  221. Dennis Boyle, Alliance Audio
  222. How do I replace this 40+ year old selenium rectifier?
  223. please advise on operating point of a 5687
  224. Output Transformer Question
  225. Stepped attenuator
  226. PP2A3 amp options
  227. Need advice: Want to learn Vacuum tubes
  228. AVO CT-160 --- Help
  229. Needed schematic....
  230. Az1 mounted on wood!
  231. Dynaco A450 specs
  232. Ecc186= SQ Ecc82
  233. tube amp kit on 230 v???
  234. some tubes
  235. ppp el84 fixed bias schematics
  236. Tube buffered NIGC trafo thoughs?
  237. driver stage
  238. PS cap placement/type
  239. Vintage OPT
  240. simple, single-ended project
  241. 6sn7 - 6bx7 - sv811-3 amp
  242. I look for a correct driver stage
  243. PCB tubes amp?
  244. XLR to 1/4" TRS?
  245. Umbilical Connector Suggestions
  246. Good Inexpensive Starter Amp Kit
  247. tube rectified preamp schematic
  248. oxygen free interconnects
  249. how to calculate feedback resistor
  250. Topaz Isolation Tranny

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