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  1. Most effective use of valve pre & active xover
  2. Tube possibilities for 2.9k-ohm speaker?
  3. Help on Preamp Mute Switch
  4. Fixed bias supply problems...
  5. Help with VTL preamp...
  6. question about 811A and 572B
  7. Dual Stereo Cathode Folower Setup
  8. tube tester
  9. Audio Innovation 1000 SE
  10. 6as7 PP Schematic Help
  11. Newbie Question: Need help diagnosing a problem, tubes on, music fades out quickly
  12. 7591EH failure
  13. opt frequency response
  14. Anyone got any opinions on this?
  15. My ForePlay Processor Controlled Preamp
  16. Tube ghetto blaster ?
  17. Help trouble shooting
  18. "The Fisher" tube amp 7189 output tubes
  19. UTC output transformers specs
  20. Regulation options for 807 g2
  21. My Mullard 5/20
  22. Anyone tried Black Beauty caps??
  23. KT88 power amp
  24. High voltage regulator
  25. Filament voltage ?
  26. Unity Gain Unbalanced to Balanced Phase Splitter
  27. Anyone know the g1-g2 capacitance of 6AU6?
  28. Any good Transformer or Tube manufactureres in India ?
  29. McMartin MA-20?
  30. Help with Jolida 302A
  31. need 13fd7 curves
  32. Drd Kt88?
  33. miniature tube amp
  34. 300B pp schematic found, what about it?
  35. Tube Output Stage
  36. se otl
  37. Toroidals as OPTs?
  38. Tube advice
  39. Understanding OPT primary Z and load matching.
  40. help with Optomal placement of output transformers.
  41. 50h B26
  42. Anyone know what this is?? Strange tube/ bulb.
  43. Please ID output transformer
  44. Cheap and Easy Tube Phono Preamp
  45. Carbon film vs metal film resistors in a stepped attenuator?
  46. Alps pots vs. TKD pots? TKD worth the extra$$?
  47. Opamp as tube driver: Protection ideas?
  48. Looking for schematics CROFT OTL APPARITION
  49. ISO (new Tango) info...
  50. Noob Question on Driver Stages
  51. High Voltage Reference
  52. DIY valve amp
  53. JJ multisection caps
  54. Inverted Interstage Transformer
  55. regarding to the design of iron-cored inductors (chokes)
  56. Trying to find an amp
  57. 12v tube output stage for cs43122 based dac?
  58. Wattages & Loudness: ?I'm Lost?
  59. cmrr of common cathode
  60. The Next Step. (and budget tube amplifier kits/designs).
  61. non-diy amplifiers with choke input power supplies
  62. Does a cathode bypass capacitor reduce hum?
  63. a tube convert tries a mosfet
  64. Motorboating in leak 20
  65. New MC preamp is comming alive
  66. HV tubes
  67. power supply pspice simulation problem
  68. Can a tube rectifier handle a C dual LC?
  69. Valve schematic & PC board design
  70. Just acqired some strange tubes.........
  71. Sovtek 6L6WXT
  72. RCA tubes, need info
  73. Stromberg Carlson 245M
  74. mounting tubes upside-down
  75. 6922 acting strange........or is it ?
  76. Fender Champ: What Transformers?
  77. Naive CCS quesion
  78. DIY scrap tubebuffer with ECC88
  79. choke current rating
  80. Velleman K8010
  81. film vs. electrolytic
  82. Tube mic preamp for speaker measurements
  83. 833a plate resistance ?
  84. second harmonic distortion
  85. Speakers not connected on tube amp, good or bad?
  86. different psu filter topologies ?
  87. Does anyone know this english amp ?
  88. kt88 power amplifier
  89. physical layout of 6B4G PP amp?
  90. Tube Life
  91. PSUD2 designer accuracy?
  92. Need advice on old 6bq5 amp...........
  93. rca83 rectifier precautions
  94. Multi chassis grounding scheme.
  95. 717a Datasheet
  96. 12B4 Battery Bias from (Preamp: Foreplay or 5687 or 12B4 )
  97. Need Six-pac amp schematic
  98. Any clue of how to use this part as a current sink for a CF?
  99. Tweeks on tubes - bring out the demagnetiserss
  100. Absolute. Best. Chassis. Ever.
  101. Zout adapted for 2 EL34 80W Va=560V
  102. load line - truth or fiction
  103. Best place to place bleeder resistor in a power supply?
  104. Pretty Tubes
  105. Preamp: Foreplay or 5687 or 12B4
  106. want to make otl with 6 tung-sol 6336a
  107. 6L6'S vs EL34's
  108. What can you tell me about Halldorson transformers
  109. CROFT OTL (APPARITION MODEL) Schematics
  110. Is there a 'Gainclone' Of the tube world?
  111. Line Amp Design review
  112. Looking for a very special project
  113. Designing a LC power supply
  114. psu caps
  115. Easiest CAD to learn to layout my chassis?
  116. newbie asks question :cathode biasing
  117. mr. pimm's ccs rev.3?
  118. Audio Research LS22 - Looking for schematics
  119. Beard P100
  120. shunt regulation??
  121. Vitamin Q VS Jensen
  122. Mystery Russian tube logo ?
  123. Counterpoint SA-7 Schematic
  124. Dual rectification off single sencondary transformer question
  125. Which preamp to choose for my ECC88s?
  126. looking for morgan jones phono amp schematic
  127. Amp for a beginner
  128. Question about direct coupling a anode follower into a cathode follower.
  129. On Line Tube Learning for newbies....
  130. EL34 Vs. EL84.......
  131. New DHT heater
  132. A Career in Tube Audio?
  133. Xicon Polypropylene Cap for Valve Amp
  134. ECC99 Heater / Cathode Max Volt
  135. Replacing Tubes
  136. schematics wanted please
  137. MCUTracer -- the missing code
  138. How do you double the voltage on a PSU?
  139. EL34 tubes to Proboi M50 amp
  140. ATH-W1000 headphones need amplifier
  141. g. pimm's rev3. and rev. 4 -6P1P/5687 ???
  142. New EL84 SE schemat.
  143. 32 NOS RCA 1644 (12L6-GT) Twin Pentode tubes
  144. reducing hum
  145. Lafayette LA-224
  146. Comments on RSD Tubes
  147. Tube heatsink
  148. wondering about direction
  149. An Ultra -linear question
  150. 5687 Preamp as I plan to build it.
  151. Hoekstra DC-Coupled 300B ... oooooh!
  152. 5687_6n1p_6p1p_gary pimm
  153. How lucky are we? TJ type 50 triode to be made. Make your preferences known now!
  154. Biasing DC heaters
  155. EL34 SE amp schematics
  156. Negative Voltage with Tube Rectification?
  157. Tube Amp on eBay
  158. Experiences with White CF/CCS CF output stage
  159. Holes in the anode plate?
  160. 5687 pre?
  161. tube design literature
  162. Trace Elliott schematic
  163. tube choice?
  164. Choke identity
  165. spotted this on ebay - 700w triodes anyone?
  166. HELP!!! for tube lovers
  167. How do you properly ground a Tamura OPT?
  168. Akihabara shopping
  169. Might be interested in this distortion thread
  170. PSE Active Loaded 12B4A anyone?
  171. Set 6080/6as7
  172. solid state just isn't doing it for me!!
  173. Where can I use this tubes
  174. Interesting math conundrum.
  175. schematic from this amp 45/717a/5u4..
  176. Strange Tube
  177. power supply help!!!!
  178. se tubeamp with px4
  179. Fixed bias PP questions
  180. Identifying Eico transformers
  181. metal shield
  182. why multi pins ?
  183. 2A3 PSE 'Arcadia' by SJS, or sorta
  184. John Swenson's (In my eyes revolutionary) preamp!
  185. tube opamps
  186. Help please with rare tube cd player
  187. OT impedance problem
  188. Amperex 6DJ8
  189. tiny amp
  190. 6C33 Internal Impedance (rp)?
  191. increasing o/p impedance to match IT??
  192. Grundig TK-60 Reel to Reel Questions
  193. Michaelson and Austin Oddysee
  194. 6gk6 tubes
  195. Anyone know anything about a 6AV5GA?
  196. A safe (?) DC coupled amp
  197. amp in trouble
  198. how to calculate lower operating point?
  199. Anyone on the tube forum ever heard a Bride Of Zen preamp?
  200. Audio Innovations 800 mk1
  201. Field of Dreams (a pair of FRT502 modulators)
  202. cathode follower
  203. ECC808- what is it more like?
  204. Help needed to find these rare values!
  205. New PP amp just completed - a few unusual features (long)
  206. MKP VS Electrolyte
  207. is 5mA too low???
  208. Dynaco FM3 220v-120v
  209. does plate current/voltage effect tube sound????
  210. Any opinions on the ECC81?
  211. #26 line stage help
  212. coupling caps? RTX vs Jupiter wax
  213. MC275 Hum Conundrum
  214. We91a
  215. Is 50 degrees C too hot?
  216. Using LEDs to bias grid voltage?
  217. DIY Hybride amplifiers
  218. wa i popped a tube lol
  219. 6C33C substitute
  220. Resistor popped...need help for replacement in Yaqin amp
  221. Check this eye candy out....
  222. Russian 5U4GB
  223. simple phono preamp circuit needed
  224. Black gate PS capacitors
  225. amp troubles
  226. Instruments Of Amplification - DIY
  227. my EL84 pre-amp with schematic
  228. Hammond AO29 to guitar amp?
  229. Radical (insane) PSU ideas
  230. First Tube Amp Considerations...
  231. hardcore tube night light?
  232. Frankenstein tube amp
  233. Can I use this tube?
  234. help for DHT bias in PP
  235. Multiple projects
  236. recommend operating point for EL84?
  237. First time builder, need advice.
  238. Tube Depot...
  239. schematics
  240. BOGEN MX60A Schematic
  241. Help with 1626 PSE Amp needed
  242. OTL question.
  243. diy tube amp
  244. Load line for CF
  245. DIY Vacuum tube amp
  246. Hammond or James OPT for SE 300B ?
  247. PSE 6550 schematic needed
  248. Schematic for Siemens "Table" Amplifier
  249. power supply for 6922 mu follower
  250. Dead simple tube circuit

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