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  1. Regulation options for 807 g2
  2. My Mullard 5/20
  3. Anyone tried Black Beauty caps??
  4. KT88 power amp
  5. High voltage regulator
  6. Filament voltage ?
  7. Unity Gain Unbalanced to Balanced Phase Splitter
  8. Anyone know the g1-g2 capacitance of 6AU6?
  9. Any good Transformer or Tube manufactureres in India ?
  10. McMartin MA-20?
  11. Help with Jolida 302A
  12. need 13fd7 curves
  13. Drd Kt88?
  14. miniature tube amp
  15. 300B pp schematic found, what about it?
  16. Tube Output Stage
  17. se otl
  18. Toroidals as OPTs?
  19. Tube advice
  20. Understanding OPT primary Z and load matching.
  21. help with Optomal placement of output transformers.
  22. 50h B26
  23. Anyone know what this is?? Strange tube/ bulb.
  24. Please ID output transformer
  25. Cheap and Easy Tube Phono Preamp
  26. Carbon film vs metal film resistors in a stepped attenuator?
  27. Alps pots vs. TKD pots? TKD worth the extra$$?
  28. Opamp as tube driver: Protection ideas?
  29. Looking for schematics CROFT OTL APPARITION
  30. ISO (new Tango) info...
  31. Noob Question on Driver Stages
  32. High Voltage Reference
  33. DIY valve amp
  34. JJ multisection caps
  35. Inverted Interstage Transformer
  36. regarding to the design of iron-cored inductors (chokes)
  37. Trying to find an amp
  38. 12v tube output stage for cs43122 based dac?
  39. Wattages & Loudness: ?I'm Lost?
  40. cmrr of common cathode
  41. The Next Step. (and budget tube amplifier kits/designs).
  42. non-diy amplifiers with choke input power supplies
  43. Does a cathode bypass capacitor reduce hum?
  44. a tube convert tries a mosfet
  45. Motorboating in leak 20
  46. New MC preamp is comming alive
  47. HV tubes
  48. power supply pspice simulation problem
  49. Can a tube rectifier handle a C dual LC?
  50. Valve schematic & PC board design
  51. Just acqired some strange tubes.........
  52. Sovtek 6L6WXT
  53. RCA tubes, need info
  54. Stromberg Carlson 245M
  55. mounting tubes upside-down
  56. 6922 acting strange........or is it ?
  57. Fender Champ: What Transformers?
  58. Naive CCS quesion
  59. DIY scrap tubebuffer with ECC88
  60. choke current rating
  61. Velleman K8010
  62. film vs. electrolytic
  63. Tube mic preamp for speaker measurements
  64. 833a plate resistance ?
  65. second harmonic distortion
  66. Speakers not connected on tube amp, good or bad?
  67. different psu filter topologies ?
  68. Does anyone know this english amp ?
  69. kt88 power amplifier
  70. physical layout of 6B4G PP amp?
  71. Tube Life
  72. PSUD2 designer accuracy?
  73. Need advice on old 6bq5 amp...........
  74. rca83 rectifier precautions
  75. Multi chassis grounding scheme.
  76. 717a Datasheet
  77. 12B4 Battery Bias from (Preamp: Foreplay or 5687 or 12B4 )
  78. Need Six-pac amp schematic
  79. Any clue of how to use this part as a current sink for a CF?
  80. Tweeks on tubes - bring out the demagnetiserss
  81. Absolute. Best. Chassis. Ever.
  82. Zout adapted for 2 EL34 80W Va=560V
  83. load line - truth or fiction
  84. Best place to place bleeder resistor in a power supply?
  85. Pretty Tubes
  86. Preamp: Foreplay or 5687 or 12B4
  87. want to make otl with 6 tung-sol 6336a
  88. 6L6'S vs EL34's
  89. What can you tell me about Halldorson transformers
  90. CROFT OTL (APPARITION MODEL) Schematics
  91. Is there a 'Gainclone' Of the tube world?
  92. Line Amp Design review
  93. Looking for a very special project
  94. Designing a LC power supply
  95. psu caps
  96. Easiest CAD to learn to layout my chassis?
  97. newbie asks question :cathode biasing
  98. mr. pimm's ccs rev.3?
  99. Audio Research LS22 - Looking for schematics
  100. Beard P100
  101. shunt regulation??
  102. Vitamin Q VS Jensen
  103. Mystery Russian tube logo ?
  104. Counterpoint SA-7 Schematic
  105. Dual rectification off single sencondary transformer question
  106. Which preamp to choose for my ECC88s?
  107. looking for morgan jones phono amp schematic
  108. Amp for a beginner
  109. Question about direct coupling a anode follower into a cathode follower.
  110. On Line Tube Learning for newbies....
  111. EL34 Vs. EL84.......
  112. New DHT heater
  113. A Career in Tube Audio?
  114. Xicon Polypropylene Cap for Valve Amp
  115. ECC99 Heater / Cathode Max Volt
  116. Replacing Tubes
  117. schematics wanted please
  118. MCUTracer -- the missing code
  119. How do you double the voltage on a PSU?
  120. EL34 tubes to Proboi M50 amp
  121. ATH-W1000 headphones need amplifier
  122. g. pimm's rev3. and rev. 4 -6P1P/5687 ???
  123. New EL84 SE schemat.
  124. 32 NOS RCA 1644 (12L6-GT) Twin Pentode tubes
  125. reducing hum
  126. Lafayette LA-224
  127. Comments on RSD Tubes
  128. Tube heatsink
  129. wondering about direction
  130. An Ultra -linear question
  131. 5687 Preamp as I plan to build it.
  132. Hoekstra DC-Coupled 300B ... oooooh!
  133. 5687_6n1p_6p1p_gary pimm
  134. How lucky are we? TJ type 50 triode to be made. Make your preferences known now!
  135. Biasing DC heaters
  136. EL34 SE amp schematics
  137. Negative Voltage with Tube Rectification?
  138. Tube Amp on eBay
  139. Experiences with White CF/CCS CF output stage
  140. Holes in the anode plate?
  141. 5687 pre?
  142. tube design literature
  143. Trace Elliott schematic
  144. tube choice?
  145. Choke identity
  146. spotted this on ebay - 700w triodes anyone?
  147. HELP!!! for tube lovers
  148. How do you properly ground a Tamura OPT?
  149. Akihabara shopping
  150. Might be interested in this distortion thread
  151. PSE Active Loaded 12B4A anyone?
  152. Set 6080/6as7
  153. solid state just isn't doing it for me!!
  154. Where can I use this tubes
  155. Interesting math conundrum.
  156. schematic from this amp 45/717a/5u4..
  157. Strange Tube
  158. power supply help!!!!
  159. se tubeamp with px4
  160. Fixed bias PP questions
  161. Identifying Eico transformers
  162. metal shield
  163. why multi pins ?
  164. 2A3 PSE 'Arcadia' by SJS, or sorta
  165. John Swenson's (In my eyes revolutionary) preamp!
  166. tube opamps
  167. Help please with rare tube cd player
  168. OT impedance problem
  169. Amperex 6DJ8
  170. tiny amp
  171. 6C33 Internal Impedance (rp)?
  172. increasing o/p impedance to match IT??
  173. Grundig TK-60 Reel to Reel Questions
  174. Michaelson and Austin Oddysee
  175. 6gk6 tubes
  176. Anyone know anything about a 6AV5GA?
  177. A safe (?) DC coupled amp
  178. amp in trouble
  179. how to calculate lower operating point?
  180. Anyone on the tube forum ever heard a Bride Of Zen preamp?
  181. Audio Innovations 800 mk1
  182. Field of Dreams (a pair of FRT502 modulators)
  183. cathode follower
  184. ECC808- what is it more like?
  185. Help needed to find these rare values!
  186. New PP amp just completed - a few unusual features (long)
  187. MKP VS Electrolyte
  188. is 5mA too low???
  189. Dynaco FM3 220v-120v
  190. does plate current/voltage effect tube sound????
  191. Any opinions on the ECC81?
  192. #26 line stage help
  193. coupling caps? RTX vs Jupiter wax
  194. MC275 Hum Conundrum
  195. We91a
  196. Is 50 degrees C too hot?
  197. Using LEDs to bias grid voltage?
  198. DIY Hybride amplifiers
  199. wa i popped a tube lol
  200. 6C33C substitute
  201. Resistor popped...need help for replacement in Yaqin amp
  202. Check this eye candy out....
  203. Russian 5U4GB
  204. simple phono preamp circuit needed
  205. Black gate PS capacitors
  206. amp troubles
  207. Instruments Of Amplification - DIY
  208. my EL84 pre-amp with schematic
  209. Hammond AO29 to guitar amp?
  210. Radical (insane) PSU ideas
  211. First Tube Amp Considerations...
  212. hardcore tube night light?
  213. Frankenstein tube amp
  214. Can I use this tube?
  215. help for DHT bias in PP
  216. Multiple projects
  217. recommend operating point for EL84?
  218. First time builder, need advice.
  219. Tube Depot...
  220. schematics
  221. BOGEN MX60A Schematic
  222. Help with 1626 PSE Amp needed
  223. OTL question.
  224. diy tube amp
  225. Load line for CF
  226. DIY Vacuum tube amp
  227. Hammond or James OPT for SE 300B ?
  228. PSE 6550 schematic needed
  229. Schematic for Siemens "Table" Amplifier
  230. power supply for 6922 mu follower
  231. Dead simple tube circuit
  232. Any info on a Musical Fidelity X-Pre?
  233. Autoformer CF amp
  234. 2a3 or otl on an fullrange coral
  235. My New Project Completed
  236. SE el84
  237. Many thanks!
  238. Switching power supply & filament
  239. tube phono amp req'd
  240. Had a strange problem today...
  241. wsw siemens ultralinear 815 410 G !!?!
  242. Bottlehead Gear
  243. Amp, Stange temporary buzz, what is that?
  244. 2a3 schematic
  245. NEWBIE needs help-static in one channel of preamp
  246. Vintage speaker screw outs to 1/4" plug
  247. Flashing EL34
  248. Sovtek 2A3 tolerances / defected tube?
  249. Massive Parallel Operating
  250. filter circuit for 866a

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