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  1. Any good Transformer or Tube manufactureres in India ?
  2. McMartin MA-20?
  3. Help with Jolida 302A
  4. need 13fd7 curves
  5. Drd Kt88?
  6. miniature tube amp
  7. 300B pp schematic found, what about it?
  8. Tube Output Stage
  9. se otl
  10. Toroidals as OPTs?
  11. Tube advice
  12. Understanding OPT primary Z and load matching.
  13. help with Optomal placement of output transformers.
  14. 50h B26
  15. Anyone know what this is?? Strange tube/ bulb.
  16. Please ID output transformer
  17. Cheap and Easy Tube Phono Preamp
  18. Carbon film vs metal film resistors in a stepped attenuator?
  19. Alps pots vs. TKD pots? TKD worth the extra$$?
  20. Opamp as tube driver: Protection ideas?
  21. Looking for schematics CROFT OTL APPARITION
  22. ISO (new Tango) info...
  23. Noob Question on Driver Stages
  24. High Voltage Reference
  25. DIY valve amp
  26. Inverted Interstage Transformer
  27. regarding to the design of iron-cored inductors (chokes)
  28. Trying to find an amp
  29. 12v tube output stage for cs43122 based dac?
  30. Wattages & Loudness: ?I'm Lost?
  31. cmrr of common cathode
  32. The Next Step. (and budget tube amplifier kits/designs).
  33. non-diy amplifiers with choke input power supplies
  34. Does a cathode bypass capacitor reduce hum?
  35. a tube convert tries a mosfet
  36. Motorboating in leak 20
  37. New MC preamp is comming alive
  38. HV tubes
  39. power supply pspice simulation problem
  40. Can a tube rectifier handle a C dual LC?
  41. Valve schematic & PC board design
  42. Just acqired some strange tubes.........
  43. Sovtek 6L6WXT
  44. RCA tubes, need info
  45. Stromberg Carlson 245M
  46. mounting tubes upside-down
  47. 6922 acting strange........or is it ?
  48. Naive CCS quesion
  49. DIY scrap tubebuffer with ECC88
  50. choke current rating
  51. Velleman K8010
  52. Tube mic preamp for speaker measurements
  53. 833a plate resistance ?
  54. second harmonic distortion
  55. Speakers not connected on tube amp, good or bad?
  56. different psu filter topologies ?
  57. Does anyone know this english amp ?
  58. kt88 power amplifier
  59. physical layout of 6B4G PP amp?
  60. Tube Life
  61. PSUD2 designer accuracy?
  62. Need advice on old 6bq5 amp...........
  63. rca83 rectifier precautions
  64. Multi chassis grounding scheme.
  65. 717a Datasheet
  66. 12B4 Battery Bias from (Preamp: Foreplay or 5687 or 12B4 )
  67. Need Six-pac amp schematic
  68. Any clue of how to use this part as a current sink for a CF?
  69. Tweeks on tubes - bring out the demagnetiserss
  70. Absolute. Best. Chassis. Ever.
  71. Zout adapted for 2 EL34 80W Va=560V
  72. load line - truth or fiction
  73. Best place to place bleeder resistor in a power supply?
  74. Pretty Tubes
  75. Preamp: Foreplay or 5687 or 12B4
  76. want to make otl with 6 tung-sol 6336a
  77. 6L6'S vs EL34's
  78. What can you tell me about Halldorson transformers
  79. CROFT OTL (APPARITION MODEL) Schematics
  80. Is there a 'Gainclone' Of the tube world?
  81. Line Amp Design review
  82. Looking for a very special project
  83. Designing a LC power supply
  84. Easiest CAD to learn to layout my chassis?
  85. newbie asks question :cathode biasing
  86. mr. pimm's ccs rev.3?
  87. Audio Research LS22 - Looking for schematics
  88. Beard P100
  89. shunt regulation??
  90. Vitamin Q VS Jensen
  91. Mystery Russian tube logo ?
  92. Counterpoint SA-7 Schematic
  93. Dual rectification off single sencondary transformer question
  94. Which preamp to choose for my ECC88s?
  95. looking for morgan jones phono amp schematic
  96. Amp for a beginner
  97. Question about direct coupling a anode follower into a cathode follower.
  98. On Line Tube Learning for newbies....
  99. EL34 Vs. EL84.......
  100. New DHT heater
  101. A Career in Tube Audio?
  102. Xicon Polypropylene Cap for Valve Amp
  103. ECC99 Heater / Cathode Max Volt
  104. Replacing Tubes
  105. schematics wanted please
  106. MCUTracer -- the missing code
  107. How do you double the voltage on a PSU?
  108. EL34 tubes to Proboi M50 amp
  109. ATH-W1000 headphones need amplifier
  110. g. pimm's rev3. and rev. 4 -6P1P/5687 ???
  111. New EL84 SE schemat.
  112. 32 NOS RCA 1644 (12L6-GT) Twin Pentode tubes
  113. reducing hum
  114. Lafayette LA-224
  115. Comments on RSD Tubes
  116. Tube heatsink
  117. wondering about direction
  118. An Ultra -linear question
  119. 5687 Preamp as I plan to build it.
  120. Hoekstra DC-Coupled 300B ... oooooh!
  121. 5687_6n1p_6p1p_gary pimm
  122. How lucky are we? TJ type 50 triode to be made. Make your preferences known now!
  123. Biasing DC heaters
  124. EL34 SE amp schematics
  125. Negative Voltage with Tube Rectification?
  126. Tube Amp on eBay
  127. Experiences with White CF/CCS CF output stage
  128. Holes in the anode plate?
  129. 5687 pre?
  130. tube design literature
  131. Trace Elliott schematic
  132. tube choice?
  133. Choke identity
  134. spotted this on ebay - 700w triodes anyone?
  135. HELP!!! for tube lovers
  136. How do you properly ground a Tamura OPT?
  137. Akihabara shopping
  138. Might be interested in this distortion thread
  139. PSE Active Loaded 12B4A anyone?
  140. Set 6080/6as7
  141. solid state just isn't doing it for me!!
  142. Where can I use this tubes
  143. Interesting math conundrum.
  144. schematic from this amp 45/717a/5u4..
  145. Strange Tube
  146. power supply help!!!!
  147. se tubeamp with px4
  148. Fixed bias PP questions
  149. Identifying Eico transformers
  150. metal shield
  151. why multi pins ?
  152. 2A3 PSE 'Arcadia' by SJS, or sorta
  153. John Swenson's (In my eyes revolutionary) preamp!
  154. tube opamps
  155. Help please with rare tube cd player
  156. OT impedance problem
  157. Amperex 6DJ8
  158. tiny amp
  159. 6C33 Internal Impedance (rp)?
  160. increasing o/p impedance to match IT??
  161. Grundig TK-60 Reel to Reel Questions
  162. Michaelson and Austin Oddysee
  163. 6gk6 tubes
  164. Anyone know anything about a 6AV5GA?
  165. A safe (?) DC coupled amp
  166. amp in trouble
  167. how to calculate lower operating point?
  168. Anyone on the tube forum ever heard a Bride Of Zen preamp?
  169. Audio Innovations 800 mk1
  170. Field of Dreams (a pair of FRT502 modulators)
  171. cathode follower
  172. ECC808- what is it more like?
  173. Help needed to find these rare values!
  174. New PP amp just completed - a few unusual features (long)
  175. MKP VS Electrolyte
  176. is 5mA too low???
  177. Dynaco FM3 220v-120v
  178. does plate current/voltage effect tube sound????
  179. Any opinions on the ECC81?
  180. #26 line stage help
  181. MC275 Hum Conundrum
  182. We91a
  183. Is 50 degrees C too hot?
  184. Using LEDs to bias grid voltage?
  185. DIY Hybride amplifiers
  186. wa i popped a tube lol
  187. 6C33C substitute
  188. Resistor popped...need help for replacement in Yaqin amp
  189. Check this eye candy out....
  190. Russian 5U4GB
  191. simple phono preamp circuit needed
  192. amp troubles
  193. Instruments Of Amplification - DIY
  194. my EL84 pre-amp with schematic
  195. Radical (insane) PSU ideas
  196. First Tube Amp Considerations...
  197. hardcore tube night light?
  198. Frankenstein tube amp
  199. Can I use this tube?
  200. help for DHT bias in PP
  201. Multiple projects
  202. recommend operating point for EL84?
  203. First time builder, need advice.
  204. Tube Depot...
  205. schematics
  206. BOGEN MX60A Schematic
  207. Help with 1626 PSE Amp needed
  208. OTL question.
  209. diy tube amp
  210. Load line for CF
  211. DIY Vacuum tube amp
  212. Hammond or James OPT for SE 300B ?
  213. PSE 6550 schematic needed
  214. Schematic for Siemens "Table" Amplifier
  215. power supply for 6922 mu follower
  216. Dead simple tube circuit
  217. Any info on a Musical Fidelity X-Pre?
  218. Autoformer CF amp
  219. 2a3 or otl on an fullrange coral
  220. My New Project Completed
  221. SE el84
  222. Many thanks!
  223. Switching power supply & filament
  224. tube phono amp req'd
  225. Had a strange problem today...
  226. wsw siemens ultralinear 815 410 G !!?!
  227. Bottlehead Gear
  228. Amp, Stange temporary buzz, what is that?
  229. 2a3 schematic
  230. NEWBIE needs help-static in one channel of preamp
  231. Vintage speaker screw outs to 1/4" plug
  232. Flashing EL34
  233. Sovtek 2A3 tolerances / defected tube?
  234. Massive Parallel Operating
  235. reasonable powered simple amp
  236. 6c19pi ?
  237. S5 Electronics 139 $ tube amp
  238. 12AU7 or 12AT7 instead of 12AX7 ?
  239. Tube Pre-Amp < $200
  240. Modification of 2A3 SE Circuit
  241. beta followers
  242. Q: Stereo Amp / Dual PS Chokes
  243. using Mosfets as diode in PS
  244. Sonic Frontiers Power 2SE
  245. Curcio Daniel
  246. Ecc89 / Ecc189
  247. Magnavox
  248. Tube Preamp 'Clone' PCB copys on ebay (Marantz, McIntosh, etc)
  249. tube rectifier life expectancy
  250. Metal VS Glass

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