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  1. Heater Supply using LM3X7 current source
  2. Stepdown input trafo
  3. increasing the bias will cause the amp to.....
  4. Transformer faulty?
  5. More crappy Russian EL34s - Svetlana this time
  6. My Tragic story about Emission Labs tube
  7. Please help me solve the problem
  8. amp freq response with o-scope
  9. Can you SEE (construction) how a tube SOUNDS?
  10. CCS fed shunt regulators
  11. Recommended Modifications/Tweaks for Dynaco PAS-3 Series II Pre-Amp
  12. ebay toys
  13. Source for 6c45pi's???
  14. phono preamp design for c3m postie valve
  15. McMartin MA-50 Troubleshooting
  16. looking for something different
  17. mc275
  18. Sv572-3 Se
  19. Alps step attenuator
  20. seeking real kt90 pp schematics
  21. -50V negative supply
  22. Inductance coupling between chokes
  23. Mercury Magnetics
  24. warming up thetubes
  25. distorsion
  26. using a plate choke?
  27. Should I trash these tubes
  28. Minature Vaccum Tube Question
  29. 46 tube user
  30. Smells like a mistake
  31. Help for my hybird zero feedback AMP
  32. help on ul transformer please
  33. Wiring the D3a as triode - What is best?
  34. Switching from ultralinear to triode
  35. Help for a Output Transfo problem
  36. Pentode models
  37. Good or bad to use parallel capacitors of same value in signal path...
  38. Urgent: Need Help on Schematics (Tube Pre-Amplifier)
  39. ASL wave 8 mods
  40. lectron jh 60 help----------------
  41. crown tube poweramp
  42. Alan kimmel mu stage article
  43. What would you do with this amp?
  44. tube software
  45. Simple Valve Preamplifier
  46. Current sourced heaters in a CF
  47. Tubes and music styles
  48. Cheap SE EL84
  49. Making a living out of tubes? (A little off-topic)
  50. EL84 matched pairs
  51. Tango XE20S voltage rating?
  52. power transformer heat
  53. Used Tube Amps, second life..
  54. Tubes
  55. Taylor 845
  56. AVO CT-160 Tube Tester - how to remove knobs?? - please help
  57. The DIYHifiSupply.com Joplin amplifier Kit
  58. Berning P-1 Preamp
  59. Which tube for OPT 7,5k SE low watts???
  60. help me with this puzzle...
  61. Univox 1501 Fried Resistors
  62. It makes me wonder ...
  63. Tubes operating in horizontal position
  64. Dewald radio N-803b keep or use parts?
  65. Ongaku
  66. PSU Design question
  67. Primary reactance of a parafeed OPT
  68. Info on IIT interstage trafos?
  69. vt25/10-Y or 45 tube
  70. 2a3, single plate-double plate?
  71. Preferred tube? KT88 vs. EL34
  72. You may laugh..but don't waste your time trying to dissuade me. 300B preamp.
  73. Parallelling power supply chokes???
  74. Sherwood S7000
  75. please explain plate curves
  76. Triode connected SV6550C with 500V HT
  77. KT88 SE schematic wanted.
  78. 6SN7 based tube buffer
  79. hum measurement
  80. Load of tubes to liquidate
  81. Unhappy with the Lilliput design
  82. Halving OPT's pri.imp. by connecting 8ohm load to 16ohm tap - Good/Bad?
  83. Tube Technology Prophet
  84. Cathode Feedback from Secondary for PP Amp
  85. Zenith Amplifier
  86. Dynaco SCA-35 fixer-upper
  87. Multiple primary power transformer question
  88. Sizing a Regulator
  89. will laziness burn my amp down?!
  90. resistors of a lower power rating
  91. wavy vibrato-like sound when amp cranked
  92. Rh34se?
  93. Ef86, 6n1p & 845pp
  94. HYBRID POWER AMPLIFIER - please help!
  95. 6528 Se
  96. single ended HiFi Regal stereo tube amplifier
  97. Matisse Line Amp
  98. changing longtail
  99. What do you think??????
  100. The amplifier itself whines
  101. DIY repair- replacing capacitors
  102. Benefits of 845B
  103. Counterpoint Preamp Modifications
  104. Humming Sovtek EF86
  105. Output Transformers
  106. RIAA phono stage
  107. The cathode FeedBack in Push-Pull amp
  108. What's a Field Coil Amplifier?
  109. Need help for ampeg tube amp transformers ...
  110. HF filter inductors for signal path
  111. Different tube options for DCMB driver stage?
  112. Crowhurst paper on output xformer search
  113. Tamura inputs trans used as linestage out
  114. Seperate Amp for center channel
  115. Look for UL41 PP Structure!!
  116. Photoelectric valves?
  117. Bell Carrillon tube amp 6V6
  118. Yamamoto Sound Craft A-08 Amplifier
  119. Wanted Radford MA-15
  120. Beyond SET and ParaFeed.... Complementary Current Triode
  121. Too much gain
  122. 2 To 3 Prong Conversion
  123. 6c33 Set
  124. Svetlana MVSZ ---> cheat??
  125. separation of phono power supply for marantz m7 clone
  126. 300b Circuit Mod.
  127. james transformers
  128. ecc preamp schematics please!!!
  129. 845B problem
  130. 150W Garage sale find.
  131. speakers for class A ?
  132. Power Tx core should ground?
  133. First try, Would some one look over.
  134. Global Feedback in Push Pull Amps
  135. Heater voltage circuit change......why please
  136. EICO 147A operators manual
  137. Please Help My Tube Microphones!
  138. Magnetic Circuit Gurus Needed
  139. Tube Blues
  140. end of tube
  141. What is meant by 'Extended Cut-off'?
  142. How is it possible?
  143. best long life for my tube
  144. My first tube amp design...check it out.
  145. Tube driver for a SS power amplifier
  146. HK & world: with Cayin, are tube kits still good value (apart from learning)?
  147. www.thetubecenter.com = reliable?
  148. Lp values for guitar amp OT
  149. what do I replace...?
  150. Rectifiers: Tube vs Solid state..
  151. What can I do with 3Q4 Pentode tubes?
  152. DIY Powdered Core Progress Report
  153. PP output transformer grounded or not ?
  154. Bias supply question
  155. Minimum filament voltage for 300B
  156. Is it ok to combine output transformers?
  157. JE labs 2A3 evaluation
  158. 6sn7,6h30,6c33c ?
  159. signal ground and earth ground
  160. Recommended 6SN7 and 6SL7
  161. Question about BAT VK 75
  162. Please,a) cause of high pitched hum, b)DC wires twisted or not
  163. What kind of tube is this
  164. Tube Identification Help Please
  165. Balanced Load Design
  166. "lift off " or "Houston we have a problem"
  167. Anyone wound SE transformer for 6c33c-b?
  168. EL802 driving a 845 ?
  169. Diodes in series and hybrids
  170. Vacuum tube modeling software - beta testers wanted
  171. Parallel Push Pull Drivers
  172. 6V6 in triode connect mode
  173. OPT winding orientation
  174. 6.3v Heater Regulator Schematic
  175. An Important Read
  176. Did a real nice find
  177. New guy with DIY ground ?s--yes, even after searching:D
  178. 5u4g vs 5u4gb
  179. Tube amp volume fluctuation
  180. Bad tube?
  181. 1626's watt?
  182. fellow Hawkeye lookin' for cadman!
  183. Shuagang 2A3C
  184. Parallel SE vs. Single SE Output Question
  185. PP OPT Core dimension
  186. Confirmation of Primary Impedance?
  187. What does a hole on the guide pin of an octal base represent?
  188. Sepp?
  189. 6AS7 lowpower amp?
  190. Dual Mono PSU with shared earth..
  191. Breadboard 6C33C-B S.E.T
  192. audionote schematic wanted !!
  193. DIY Extreme performance Output Transformers - AMSOL
  194. Dressing up Ampex 2012 tube amps
  195. About McIntosh C22 power transformer
  196. it is almost alive
  197. Ef86, 6H30PI and 2 EL34
  198. 7868 tubes in Bogen CHB100
  199. DIY Powdered Iron Tranny Core
  200. Which BG cap best suited for cathode bypass?
  201. Oscillation question- pre or power?
  202. changing (de)coupling cap values
  203. opamp driving tubes
  204. tube 833a
  205. My latest Project (nightmare)
  206. output transformer primary imp. calculation
  207. rogers cadet mk3 hummm.....
  208. Someone help: SE shematic with GK71?
  209. Calling Graham Ingle of black cat electronics
  210. Old Emerson Tube Radio... great find!
  211. Fender princeton/champ clone
  212. E810F in triode
  213. GZ37 replacement?
  214. Bias adjustment question
  215. 6W Self Inverting 6BQ5 Amp
  216. Inductance a problem with wirewound pots?
  217. Fun circuit with a 12ax7 (ecc83)
  218. want to do PP-GM70
  219. spraying the guts of my amp...
  220. How to drop 10v from mains for 300b amp.
  221. SE Output Primary Impedence
  222. Different input valves for KT88
  223. EL84/6BQ5 LUXMAN Amps
  224. Heresy? Replacing tube rectifier w/Weber Copper Cap
  225. Direct Coupled Choke-assisted Mu-stage
  226. Another 845 SE
  227. Is it possible - 6922 Active X-over running with ~ +/- 40V ?
  228. 12FQ8's ?
  229. my first tube site
  230. different measurements
  231. DIY Dyna MK 2's and using bottlehead C4S
  232. Elektor ECL86 RIAA Preamp
  233. ECC88 - upgrading from Teonex - Help ?
  234. B+ problem?
  235. Realistic SAF 24c - Need some help
  236. what is the cap
  237. EAR 509 Mkii manual
  238. Where do you draw the line between tube and sand?
  239. Shinrock transformers
  240. OT: Anybody having problems getting to AA ? nt
  241. how much above B+ will voltage swing in OPT?
  242. bias meter and pot lead length
  243. 211 biasing voltages preferances
  244. Definitely NOT a Loftin-White!!
  245. Val MP 211 info wanted
  246. Look for EL33 PP structure circuit
  247. Rodding Bogen CHB-10A Mono Blocks
  248. two value tube amps for active DIY horns
  249. GEC 912+
  250. soon available as wrist watch.....

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