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  1. Transformer faulty?
  2. More crappy Russian EL34s - Svetlana this time
  3. My Tragic story about Emission Labs tube
  4. Please help me solve the problem
  5. amp freq response with o-scope
  6. Can you SEE (construction) how a tube SOUNDS?
  7. CCS fed shunt regulators
  8. Recommended Modifications/Tweaks for Dynaco PAS-3 Series II Pre-Amp
  9. ebay toys
  10. Source for 6c45pi's???
  11. phono preamp design for c3m postie valve
  12. McMartin MA-50 Troubleshooting
  13. looking for something different
  14. mc275
  15. Sv572-3 Se
  16. Alps step attenuator
  17. seeking real kt90 pp schematics
  18. -50V negative supply
  19. Inductance coupling between chokes
  20. Mercury Magnetics
  21. warming up thetubes
  22. distorsion
  23. using a plate choke?
  24. Should I trash these tubes
  25. Minature Vaccum Tube Question
  26. 46 tube user
  27. Smells like a mistake
  28. Help for my hybird zero feedback AMP
  29. help on ul transformer please
  30. Wiring the D3a as triode - What is best?
  31. Switching from ultralinear to triode
  32. Help for a Output Transfo problem
  33. Pentode models
  34. Good or bad to use parallel capacitors of same value in signal path...
  35. Urgent: Need Help on Schematics (Tube Pre-Amplifier)
  36. ASL wave 8 mods
  37. lectron jh 60 help----------------
  38. crown tube poweramp
  39. Alan kimmel mu stage article
  40. What would you do with this amp?
  41. tube software
  42. Simple Valve Preamplifier
  43. Current sourced heaters in a CF
  44. Tubes and music styles
  45. Cheap SE EL84
  46. Making a living out of tubes? (A little off-topic)
  47. EL84 matched pairs
  48. Tango XE20S voltage rating?
  49. power transformer heat
  50. Used Tube Amps, second life..
  51. Tubes
  52. Taylor 845
  53. The DIYHifiSupply.com Joplin amplifier Kit
  54. Berning P-1 Preamp
  55. Which tube for OPT 7,5k SE low watts???
  56. help me with this puzzle...
  57. It makes me wonder ...
  58. Tubes operating in horizontal position
  59. Dewald radio N-803b keep or use parts?
  60. Ongaku
  61. PSU Design question
  62. Primary reactance of a parafeed OPT
  63. Info on IIT interstage trafos?
  64. vt25/10-Y or 45 tube
  65. 2a3, single plate-double plate?
  66. Preferred tube? KT88 vs. EL34
  67. You may laugh..but don't waste your time trying to dissuade me. 300B preamp.
  68. Parallelling power supply chokes???
  69. Sherwood S7000
  70. please explain plate curves
  71. Triode connected SV6550C with 500V HT
  72. KT88 SE schematic wanted.
  73. 6SN7 based tube buffer
  74. hum measurement
  75. Load of tubes to liquidate
  76. Unhappy with the Lilliput design
  77. Halving OPT's pri.imp. by connecting 8ohm load to 16ohm tap - Good/Bad?
  78. Tube Technology Prophet
  79. Cathode Feedback from Secondary for PP Amp
  80. Zenith Amplifier
  81. Dynaco SCA-35 fixer-upper
  82. Multiple primary power transformer question
  83. Sizing a Regulator
  84. will laziness burn my amp down?!
  85. resistors of a lower power rating
  86. wavy vibrato-like sound when amp cranked
  87. Rh34se?
  88. Ef86, 6n1p & 845pp
  89. HYBRID POWER AMPLIFIER - please help!
  90. 6528 Se
  91. single ended HiFi Regal stereo tube amplifier
  92. Matisse Line Amp
  93. changing longtail
  94. What do you think??????
  95. The amplifier itself whines
  96. DIY repair- replacing capacitors
  97. Benefits of 845B
  98. Counterpoint Preamp Modifications
  99. Humming Sovtek EF86
  100. Output Transformers
  101. RIAA phono stage
  102. The cathode FeedBack in Push-Pull amp
  103. What's a Field Coil Amplifier?
  104. HF filter inductors for signal path
  105. Different tube options for DCMB driver stage?
  106. Crowhurst paper on output xformer search
  107. Tamura inputs trans used as linestage out
  108. Seperate Amp for center channel
  109. Look for UL41 PP Structure!!
  110. Photoelectric valves?
  111. Bell Carrillon tube amp 6V6
  112. Yamamoto Sound Craft A-08 Amplifier
  113. Wanted Radford MA-15
  114. Beyond SET and ParaFeed.... Complementary Current Triode
  115. Too much gain
  116. 2 To 3 Prong Conversion
  117. 6c33 Set
  118. Svetlana MVSZ ---> cheat??
  119. separation of phono power supply for marantz m7 clone
  120. 300b Circuit Mod.
  121. james transformers
  122. ecc preamp schematics please!!!
  123. 845B problem
  124. 150W Garage sale find.
  125. speakers for class A ?
  126. Power Tx core should ground?
  127. First try, Would some one look over.
  128. Global Feedback in Push Pull Amps
  129. Heater voltage circuit change......why please
  130. EICO 147A operators manual
  131. Please Help My Tube Microphones!
  132. Magnetic Circuit Gurus Needed
  133. Tube Blues
  134. end of tube
  135. What is meant by 'Extended Cut-off'?
  136. How is it possible?
  137. best long life for my tube
  138. My first tube amp design...check it out.
  139. Tube driver for a SS power amplifier
  140. HK & world: with Cayin, are tube kits still good value (apart from learning)?
  141. www.thetubecenter.com = reliable?
  142. what do I replace...?
  143. Rectifiers: Tube vs Solid state..
  144. What can I do with 3Q4 Pentode tubes?
  145. DIY Powdered Core Progress Report
  146. PP output transformer grounded or not ?
  147. Bias supply question
  148. Minimum filament voltage for 300B
  149. Is it ok to combine output transformers?
  150. JE labs 2A3 evaluation
  151. 6sn7,6h30,6c33c ?
  152. signal ground and earth ground
  153. Recommended 6SN7 and 6SL7
  154. Question about BAT VK 75
  155. Please,a) cause of high pitched hum, b)DC wires twisted or not
  156. What kind of tube is this
  157. Tube Identification Help Please
  158. Balanced Load Design
  159. "lift off " or "Houston we have a problem"
  160. Anyone wound SE transformer for 6c33c-b?
  161. EL802 driving a 845 ?
  162. Diodes in series and hybrids
  163. Vacuum tube modeling software - beta testers wanted
  164. Parallel Push Pull Drivers
  165. 6V6 in triode connect mode
  166. OPT winding orientation
  167. 6.3v Heater Regulator Schematic
  168. An Important Read
  169. Did a real nice find
  170. New guy with DIY ground ?s--yes, even after searching:D
  171. 5u4g vs 5u4gb
  172. Tube amp volume fluctuation
  173. Bad tube?
  174. 1626's watt?
  175. fellow Hawkeye lookin' for cadman!
  176. Shuagang 2A3C
  177. Parallel SE vs. Single SE Output Question
  178. PP OPT Core dimension
  179. Confirmation of Primary Impedance?
  180. What does a hole on the guide pin of an octal base represent?
  181. Sepp?
  182. 6AS7 lowpower amp?
  183. Dual Mono PSU with shared earth..
  184. Breadboard 6C33C-B S.E.T
  185. audionote schematic wanted !!
  186. DIY Extreme performance Output Transformers - AMSOL
  187. Dressing up Ampex 2012 tube amps
  188. About McIntosh C22 power transformer
  189. it is almost alive
  190. Ef86, 6H30PI and 2 EL34
  191. 7868 tubes in Bogen CHB100
  192. DIY Powdered Iron Tranny Core
  193. Which BG cap best suited for cathode bypass?
  194. Oscillation question- pre or power?
  195. changing (de)coupling cap values
  196. opamp driving tubes
  197. tube 833a
  198. My latest Project (nightmare)
  199. output transformer primary imp. calculation
  200. rogers cadet mk3 hummm.....
  201. Someone help: SE shematic with GK71?
  202. Calling Graham Ingle of black cat electronics
  203. Old Emerson Tube Radio... great find!
  204. E810F in triode
  205. GZ37 replacement?
  206. Bias adjustment question
  207. 6W Self Inverting 6BQ5 Amp
  208. Inductance a problem with wirewound pots?
  209. Fun circuit with a 12ax7 (ecc83)
  210. want to do PP-GM70
  211. spraying the guts of my amp...
  212. How to drop 10v from mains for 300b amp.
  213. SE Output Primary Impedence
  214. Different input valves for KT88
  215. EL84/6BQ5 LUXMAN Amps
  216. Heresy? Replacing tube rectifier w/Weber Copper Cap
  217. Direct Coupled Choke-assisted Mu-stage
  218. Another 845 SE
  219. Is it possible - 6922 Active X-over running with ~ +/- 40V ?
  220. 12FQ8's ?
  221. my first tube site
  222. different measurements
  223. DIY Dyna MK 2's and using bottlehead C4S
  224. Elektor ECL86 RIAA Preamp
  225. ECC88 - upgrading from Teonex - Help ?
  226. B+ problem?
  227. Realistic SAF 24c - Need some help
  228. what is the cap
  229. EAR 509 Mkii manual
  230. Where do you draw the line between tube and sand?
  231. Shinrock transformers
  232. OT: Anybody having problems getting to AA ? nt
  233. how much above B+ will voltage swing in OPT?
  234. bias meter and pot lead length
  235. 211 biasing voltages preferances
  236. Definitely NOT a Loftin-White!!
  237. Val MP 211 info wanted
  238. Look for EL33 PP structure circuit
  239. Rodding Bogen CHB-10A Mono Blocks
  240. two value tube amps for active DIY horns
  241. GEC 912+
  242. soon available as wrist watch.....
  243. Low sensitivity speakers and valvs, no nfb?
  244. Has anyone built this amp?
  245. Difference bewteen ultralinear & triode mode?
  246. 7586 nuvistor
  247. Valve Identification-Help
  248. KT 88 schematic search
  249. Bias the new power tube
  250. 6M6G Structure of the circuit

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