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  1. KT88 or 6550?
  2. How to choose 6c33b?
  3. Using rectifier tubes in parallell
  4. Small problem at power off
  5. Preamp rebuild - hum problem
  6. what should I do with this tranny???
  7. Will this 2A3 PSE work?
  8. Ec86
  9. Worth to buy - tubes?
  10. 10/10/ preamp
  11. what do you think of this preamp?
  12. Tube FM -- Armstrong's first bdcst commemorated
  13. rjm 6dj8 phono section
  14. mercury vapor rectifier tubes on e-bay
  15. Russian Tube Stuff -- WSJ
  16. Help Please!!!!!!
  17. 5902 amp schematics?
  18. Microphonics...........
  19. High voltage PSU
  20. 2A3 v 6550
  21. Coupling cap question
  22. Wollcott cross coupled circuit
  23. TAD Tubes where are they from?
  24. ebay Junk or Treasures?
  25. interconnects
  26. In few words
  27. GlassFET Design Ideas
  28. ecc88 tube pover supply-rect.
  29. A tubeNoob enters => I bought a Dynavox VR-70E
  30. plugging guitar amp to phono reciever
  31. Heater Supply using LM3X7 current source
  32. Stepdown input trafo
  33. increasing the bias will cause the amp to.....
  34. Transformer faulty?
  35. More crappy Russian EL34s - Svetlana this time
  36. My Tragic story about Emission Labs tube
  37. Please help me solve the problem
  38. amp freq response with o-scope
  39. Can you SEE (construction) how a tube SOUNDS?
  40. CCS fed shunt regulators
  41. Recommended Modifications/Tweaks for Dynaco PAS-3 Series II Pre-Amp
  42. ebay toys
  43. Source for 6c45pi's???
  44. phono preamp design for c3m postie valve
  45. McMartin MA-50 Troubleshooting
  46. looking for something different
  47. mc275
  48. Sv572-3 Se
  49. Alps step attenuator
  50. seeking real kt90 pp schematics
  51. -50V negative supply
  52. Inductance coupling between chokes
  53. Mercury Magnetics
  54. warming up thetubes
  55. distorsion
  56. using a plate choke?
  57. Should I trash these tubes
  58. Minature Vaccum Tube Question
  59. 46 tube user
  60. Smells like a mistake
  61. Help for my hybird zero feedback AMP
  62. help on ul transformer please
  63. Wiring the D3a as triode - What is best?
  64. Switching from ultralinear to triode
  65. Help for a Output Transfo problem
  66. Pentode models
  67. Good or bad to use parallel capacitors of same value in signal path...
  68. Urgent: Need Help on Schematics (Tube Pre-Amplifier)
  69. ASL wave 8 mods
  70. lectron jh 60 help----------------
  71. crown tube poweramp
  72. Alan kimmel mu stage article
  73. What would you do with this amp?
  74. tube software
  75. Simple Valve Preamplifier
  76. Current sourced heaters in a CF
  77. Tubes and music styles
  78. Cheap SE EL84
  79. Making a living out of tubes? (A little off-topic)
  80. EL84 matched pairs
  81. Tango XE20S voltage rating?
  82. power transformer heat
  83. Used Tube Amps, second life..
  84. Tubes
  85. Taylor 845
  86. AVO CT-160 Tube Tester - how to remove knobs?? - please help
  87. The DIYHifiSupply.com Joplin amplifier Kit
  88. Berning P-1 Preamp
  89. Which tube for OPT 7,5k SE low watts???
  90. help me with this puzzle...
  91. Univox 1501 Fried Resistors
  92. It makes me wonder ...
  93. Tubes operating in horizontal position
  94. Dewald radio N-803b keep or use parts?
  95. Ongaku
  96. PSU Design question
  97. Primary reactance of a parafeed OPT
  98. Info on IIT interstage trafos?
  99. vt25/10-Y or 45 tube
  100. 2a3, single plate-double plate?
  101. Preferred tube? KT88 vs. EL34
  102. You may laugh..but don't waste your time trying to dissuade me. 300B preamp.
  103. Parallelling power supply chokes???
  104. Sherwood S7000
  105. please explain plate curves
  106. Triode connected SV6550C with 500V HT
  107. KT88 SE schematic wanted.
  108. 6SN7 based tube buffer
  109. hum measurement
  110. Load of tubes to liquidate
  111. Unhappy with the Lilliput design
  112. Halving OPT's pri.imp. by connecting 8ohm load to 16ohm tap - Good/Bad?
  113. Tube Technology Prophet
  114. Cathode Feedback from Secondary for PP Amp
  115. Zenith Amplifier
  116. Dynaco SCA-35 fixer-upper
  117. Multiple primary power transformer question
  118. Sizing a Regulator
  119. will laziness burn my amp down?!
  120. resistors of a lower power rating
  121. wavy vibrato-like sound when amp cranked
  122. Rh34se?
  123. Ef86, 6n1p & 845pp
  124. HYBRID POWER AMPLIFIER - please help!
  125. 6528 Se
  126. single ended HiFi Regal stereo tube amplifier
  127. Matisse Line Amp
  128. changing longtail
  129. What do you think??????
  130. The amplifier itself whines
  131. DIY repair- replacing capacitors
  132. Benefits of 845B
  133. Counterpoint Preamp Modifications
  134. Humming Sovtek EF86
  135. Output Transformers
  136. RIAA phono stage
  137. The cathode FeedBack in Push-Pull amp
  138. What's a Field Coil Amplifier?
  139. Need help for ampeg tube amp transformers ...
  140. HF filter inductors for signal path
  141. Different tube options for DCMB driver stage?
  142. Crowhurst paper on output xformer search
  143. Tamura inputs trans used as linestage out
  144. Seperate Amp for center channel
  145. Look for UL41 PP Structure!!
  146. Photoelectric valves?
  147. Bell Carrillon tube amp 6V6
  148. Yamamoto Sound Craft A-08 Amplifier
  149. Wanted Radford MA-15
  150. Beyond SET and ParaFeed.... Complementary Current Triode
  151. Too much gain
  152. 2 To 3 Prong Conversion
  153. 6c33 Set
  154. Svetlana MVSZ ---> cheat??
  155. separation of phono power supply for marantz m7 clone
  156. 300b Circuit Mod.
  157. james transformers
  158. ecc preamp schematics please!!!
  159. 845B problem
  160. 150W Garage sale find.
  161. speakers for class A ?
  162. Power Tx core should ground?
  163. First try, Would some one look over.
  164. Global Feedback in Push Pull Amps
  165. Heater voltage circuit change......why please
  166. EICO 147A operators manual
  167. Please Help My Tube Microphones!
  168. Magnetic Circuit Gurus Needed
  169. Tube Blues
  170. end of tube
  171. What is meant by 'Extended Cut-off'?
  172. How is it possible?
  173. best long life for my tube
  174. My first tube amp design...check it out.
  175. Tube driver for a SS power amplifier
  176. HK & world: with Cayin, are tube kits still good value (apart from learning)?
  177. www.thetubecenter.com = reliable?
  178. Lp values for guitar amp OT
  179. what do I replace...?
  180. Rectifiers: Tube vs Solid state..
  181. What can I do with 3Q4 Pentode tubes?
  182. DIY Powdered Core Progress Report
  183. PP output transformer grounded or not ?
  184. Bias supply question
  185. Minimum filament voltage for 300B
  186. Is it ok to combine output transformers?
  187. JE labs 2A3 evaluation
  188. 6sn7,6h30,6c33c ?
  189. signal ground and earth ground
  190. Recommended 6SN7 and 6SL7
  191. Question about BAT VK 75
  192. Please,a) cause of high pitched hum, b)DC wires twisted or not
  193. What kind of tube is this
  194. Tube Identification Help Please
  195. Balanced Load Design
  196. "lift off " or "Houston we have a problem"
  197. Anyone wound SE transformer for 6c33c-b?
  198. EL802 driving a 845 ?
  199. Diodes in series and hybrids
  200. Vacuum tube modeling software - beta testers wanted
  201. Parallel Push Pull Drivers
  202. 6V6 in triode connect mode
  203. OPT winding orientation
  204. 6.3v Heater Regulator Schematic
  205. An Important Read
  206. Did a real nice find
  207. New guy with DIY ground ?s--yes, even after searching:D
  208. 5u4g vs 5u4gb
  209. Tube amp volume fluctuation
  210. Bad tube?
  211. 1626's watt?
  212. fellow Hawkeye lookin' for cadman!
  213. Shuagang 2A3C
  214. Parallel SE vs. Single SE Output Question
  215. PP OPT Core dimension
  216. Confirmation of Primary Impedance?
  217. What does a hole on the guide pin of an octal base represent?
  218. Sepp?
  219. 6AS7 lowpower amp?
  220. Dual Mono PSU with shared earth..
  221. Breadboard 6C33C-B S.E.T
  222. audionote schematic wanted !!
  223. DIY Extreme performance Output Transformers - AMSOL
  224. Dressing up Ampex 2012 tube amps
  225. About McIntosh C22 power transformer
  226. it is almost alive
  227. Ef86, 6H30PI and 2 EL34
  228. 7868 tubes in Bogen CHB100
  229. DIY Powdered Iron Tranny Core
  230. Which BG cap best suited for cathode bypass?
  231. Oscillation question- pre or power?
  232. changing (de)coupling cap values
  233. opamp driving tubes
  234. tube 833a
  235. My latest Project (nightmare)
  236. output transformer primary imp. calculation
  237. rogers cadet mk3 hummm.....
  238. Someone help: SE shematic with GK71?
  239. Calling Graham Ingle of black cat electronics
  240. Old Emerson Tube Radio... great find!
  241. Fender princeton/champ clone
  242. E810F in triode
  243. GZ37 replacement?
  244. Bias adjustment question
  245. 6W Self Inverting 6BQ5 Amp
  246. Inductance a problem with wirewound pots?
  247. Fun circuit with a 12ax7 (ecc83)
  248. want to do PP-GM70
  249. spraying the guts of my amp...
  250. How to drop 10v from mains for 300b amp.

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