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  1. warming up thetubes
  2. distorsion
  3. using a plate choke?
  4. Should I trash these tubes
  5. Minature Vaccum Tube Question
  6. 46 tube user
  7. Smells like a mistake
  8. Help for my hybird zero feedback AMP
  9. help on ul transformer please
  10. Wiring the D3a as triode - What is best?
  11. Switching from ultralinear to triode
  12. Help for a Output Transfo problem
  13. Pentode models
  14. Good or bad to use parallel capacitors of same value in signal path...
  15. Urgent: Need Help on Schematics (Tube Pre-Amplifier)
  16. ASL wave 8 mods
  17. lectron jh 60 help----------------
  18. crown tube poweramp
  19. Alan kimmel mu stage article
  20. What would you do with this amp?
  21. tube software
  22. Simple Valve Preamplifier
  23. Current sourced heaters in a CF
  24. Tubes and music styles
  25. Cheap SE EL84
  26. Making a living out of tubes? (A little off-topic)
  27. EL84 matched pairs
  28. Tango XE20S voltage rating?
  29. power transformer heat
  30. Used Tube Amps, second life..
  31. Tubes
  32. Taylor 845
  33. AVO CT-160 Tube Tester - how to remove knobs?? - please help
  34. The DIYHifiSupply.com Joplin amplifier Kit
  35. Berning P-1 Preamp
  36. Which tube for OPT 7,5k SE low watts???
  37. help me with this puzzle...
  38. Univox 1501 Fried Resistors
  39. It makes me wonder ...
  40. Tubes operating in horizontal position
  41. Dewald radio N-803b keep or use parts?
  42. Ongaku
  43. PSU Design question
  44. Primary reactance of a parafeed OPT
  45. Info on IIT interstage trafos?
  46. vt25/10-Y or 45 tube
  47. 2a3, single plate-double plate?
  48. Preferred tube? KT88 vs. EL34
  49. You may laugh..but don't waste your time trying to dissuade me. 300B preamp.
  50. Parallelling power supply chokes???
  51. Sherwood S7000
  52. please explain plate curves
  53. Triode connected SV6550C with 500V HT
  54. KT88 SE schematic wanted.
  55. 6SN7 based tube buffer
  56. hum measurement
  57. Load of tubes to liquidate
  58. Unhappy with the Lilliput design
  59. Halving OPT's pri.imp. by connecting 8ohm load to 16ohm tap - Good/Bad?
  60. Tube Technology Prophet
  61. Cathode Feedback from Secondary for PP Amp
  62. Zenith Amplifier
  63. Dynaco SCA-35 fixer-upper
  64. Multiple primary power transformer question
  65. Sizing a Regulator
  66. will laziness burn my amp down?!
  67. resistors of a lower power rating
  68. wavy vibrato-like sound when amp cranked
  69. Rh34se?
  70. Ef86, 6n1p & 845pp
  71. HYBRID POWER AMPLIFIER - please help!
  72. 6528 Se
  73. single ended HiFi Regal stereo tube amplifier
  74. Matisse Line Amp
  75. changing longtail
  76. What do you think??????
  77. The amplifier itself whines
  78. DIY repair- replacing capacitors
  79. Benefits of 845B
  80. Counterpoint Preamp Modifications
  81. Humming Sovtek EF86
  82. Output Transformers
  83. RIAA phono stage
  84. The cathode FeedBack in Push-Pull amp
  85. What's a Field Coil Amplifier?
  86. Need help for ampeg tube amp transformers ...
  87. HF filter inductors for signal path
  88. Different tube options for DCMB driver stage?
  89. Crowhurst paper on output xformer search
  90. Tamura inputs trans used as linestage out
  91. Seperate Amp for center channel
  92. Look for UL41 PP Structure!!
  93. Photoelectric valves?
  94. Bell Carrillon tube amp 6V6
  95. Yamamoto Sound Craft A-08 Amplifier
  96. Wanted Radford MA-15
  97. Beyond SET and ParaFeed.... Complementary Current Triode
  98. Too much gain
  99. 2 To 3 Prong Conversion
  100. 6c33 Set
  101. Svetlana MVSZ ---> cheat??
  102. separation of phono power supply for marantz m7 clone
  103. 300b Circuit Mod.
  104. james transformers
  105. ecc preamp schematics please!!!
  106. 845B problem
  107. 150W Garage sale find.
  108. speakers for class A ?
  109. Power Tx core should ground?
  110. First try, Would some one look over.
  111. Global Feedback in Push Pull Amps
  112. Heater voltage circuit change......why please
  113. EICO 147A operators manual
  114. Please Help My Tube Microphones!
  115. Magnetic Circuit Gurus Needed
  116. Tube Blues
  117. end of tube
  118. What is meant by 'Extended Cut-off'?
  119. How is it possible?
  120. best long life for my tube
  121. My first tube amp design...check it out.
  122. Tube driver for a SS power amplifier
  123. HK & world: with Cayin, are tube kits still good value (apart from learning)?
  124. www.thetubecenter.com = reliable?
  125. Lp values for guitar amp OT
  126. what do I replace...?
  127. Rectifiers: Tube vs Solid state..
  128. What can I do with 3Q4 Pentode tubes?
  129. DIY Powdered Core Progress Report
  130. PP output transformer grounded or not ?
  131. Bias supply question
  132. Minimum filament voltage for 300B
  133. Is it ok to combine output transformers?
  134. JE labs 2A3 evaluation
  135. 6sn7,6h30,6c33c ?
  136. signal ground and earth ground
  137. Recommended 6SN7 and 6SL7
  138. Question about BAT VK 75
  139. Please,a) cause of high pitched hum, b)DC wires twisted or not
  140. What kind of tube is this
  141. Tube Identification Help Please
  142. Balanced Load Design
  143. "lift off " or "Houston we have a problem"
  144. Anyone wound SE transformer for 6c33c-b?
  145. EL802 driving a 845 ?
  146. Diodes in series and hybrids
  147. Vacuum tube modeling software - beta testers wanted
  148. Parallel Push Pull Drivers
  149. 6V6 in triode connect mode
  150. OPT winding orientation
  151. 6.3v Heater Regulator Schematic
  152. An Important Read
  153. Did a real nice find
  154. New guy with DIY ground ?s--yes, even after searching:D
  155. 5u4g vs 5u4gb
  156. Tube amp volume fluctuation
  157. Bad tube?
  158. 1626's watt?
  159. fellow Hawkeye lookin' for cadman!
  160. Shuagang 2A3C
  161. Parallel SE vs. Single SE Output Question
  162. PP OPT Core dimension
  163. Confirmation of Primary Impedance?
  164. What does a hole on the guide pin of an octal base represent?
  165. Sepp?
  166. 6AS7 lowpower amp?
  167. Dual Mono PSU with shared earth..
  168. Breadboard 6C33C-B S.E.T
  169. audionote schematic wanted !!
  170. DIY Extreme performance Output Transformers - AMSOL
  171. Dressing up Ampex 2012 tube amps
  172. About McIntosh C22 power transformer
  173. it is almost alive
  174. Ef86, 6H30PI and 2 EL34
  175. 7868 tubes in Bogen CHB100
  176. DIY Powdered Iron Tranny Core
  177. Which BG cap best suited for cathode bypass?
  178. Oscillation question- pre or power?
  179. changing (de)coupling cap values
  180. opamp driving tubes
  181. tube 833a
  182. My latest Project (nightmare)
  183. output transformer primary imp. calculation
  184. rogers cadet mk3 hummm.....
  185. Someone help: SE shematic with GK71?
  186. Calling Graham Ingle of black cat electronics
  187. Old Emerson Tube Radio... great find!
  188. Fender princeton/champ clone
  189. E810F in triode
  190. GZ37 replacement?
  191. Bias adjustment question
  192. 6W Self Inverting 6BQ5 Amp
  193. Inductance a problem with wirewound pots?
  194. Fun circuit with a 12ax7 (ecc83)
  195. want to do PP-GM70
  196. spraying the guts of my amp...
  197. How to drop 10v from mains for 300b amp.
  198. SE Output Primary Impedence
  199. Different input valves for KT88
  200. EL84/6BQ5 LUXMAN Amps
  201. Heresy? Replacing tube rectifier w/Weber Copper Cap
  202. Direct Coupled Choke-assisted Mu-stage
  203. Another 845 SE
  204. Is it possible - 6922 Active X-over running with ~ +/- 40V ?
  205. 12FQ8's ?
  206. my first tube site
  207. different measurements
  208. DIY Dyna MK 2's and using bottlehead C4S
  209. Elektor ECL86 RIAA Preamp
  210. ECC88 - upgrading from Teonex - Help ?
  211. B+ problem?
  212. Realistic SAF 24c - Need some help
  213. what is the cap
  214. EAR 509 Mkii manual
  215. Where do you draw the line between tube and sand?
  216. Shinrock transformers
  217. OT: Anybody having problems getting to AA ? nt
  218. how much above B+ will voltage swing in OPT?
  219. bias meter and pot lead length
  220. 211 biasing voltages preferances
  221. Definitely NOT a Loftin-White!!
  222. Val MP 211 info wanted
  223. Look for EL33 PP structure circuit
  224. Rodding Bogen CHB-10A Mono Blocks
  225. two value tube amps for active DIY horns
  226. GEC 912+
  227. soon available as wrist watch.....
  228. Low sensitivity speakers and valvs, no nfb?
  229. Has anyone built this amp?
  230. Difference bewteen ultralinear & triode mode?
  231. 7586 nuvistor
  232. Valve Identification-Help
  233. KT 88 schematic search
  234. Bias the new power tube
  235. 6M6G Structure of the circuit
  236. I Think I Saw Heaven !
  237. Tron Syren
  238. extremely low output
  239. project suggestion with spare trans
  240. cinema amps
  241. c3g producing sparks
  242. Where to get transformer parts?
  243. penta labs
  244. Dynaco ST70 clone
  245. anyone tried the diy paradise simple el84 pp
  246. compression?
  247. 100V trannies as valve OPT
  248. 6bm8 / Ecl82 Pse & Srpp
  249. Lowther LL26 restoration
  250. Can I trust my Valve Tester

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