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  1. Preferred tube? KT88 vs. EL34
  2. You may laugh..but don't waste your time trying to dissuade me. 300B preamp.
  3. Parallelling power supply chokes???
  4. Sherwood S7000
  5. please explain plate curves
  6. Triode connected SV6550C with 500V HT
  7. KT88 SE schematic wanted.
  8. 6SN7 based tube buffer
  9. hum measurement
  10. Load of tubes to liquidate
  11. Unhappy with the Lilliput design
  12. Halving OPT's pri.imp. by connecting 8ohm load to 16ohm tap - Good/Bad?
  13. Tube Technology Prophet
  14. Cathode Feedback from Secondary for PP Amp
  15. Zenith Amplifier
  16. Dynaco SCA-35 fixer-upper
  17. Multiple primary power transformer question
  18. Sizing a Regulator
  19. will laziness burn my amp down?!
  20. resistors of a lower power rating
  21. wavy vibrato-like sound when amp cranked
  22. Rh34se?
  23. Ef86, 6n1p & 845pp
  24. HYBRID POWER AMPLIFIER - please help!
  25. 6528 Se
  26. single ended HiFi Regal stereo tube amplifier
  27. Matisse Line Amp
  28. changing longtail
  29. What do you think??????
  30. The amplifier itself whines
  31. DIY repair- replacing capacitors
  32. Benefits of 845B
  33. Counterpoint Preamp Modifications
  34. Humming Sovtek EF86
  35. Output Transformers
  36. RIAA phono stage
  37. The cathode FeedBack in Push-Pull amp
  38. What's a Field Coil Amplifier?
  39. Need help for ampeg tube amp transformers ...
  40. HF filter inductors for signal path
  41. Different tube options for DCMB driver stage?
  42. Crowhurst paper on output xformer search
  43. Tamura inputs trans used as linestage out
  44. Seperate Amp for center channel
  45. Look for UL41 PP Structure!!
  46. Photoelectric valves?
  47. Bell Carrillon tube amp 6V6
  48. Yamamoto Sound Craft A-08 Amplifier
  49. Wanted Radford MA-15
  50. Beyond SET and ParaFeed.... Complementary Current Triode
  51. Too much gain
  52. 2 To 3 Prong Conversion
  53. 6c33 Set
  54. Svetlana MVSZ ---> cheat??
  55. separation of phono power supply for marantz m7 clone
  56. 300b Circuit Mod.
  57. james transformers
  58. ecc preamp schematics please!!!
  59. 845B problem
  60. 150W Garage sale find.
  61. speakers for class A ?
  62. Power Tx core should ground?
  63. First try, Would some one look over.
  64. Global Feedback in Push Pull Amps
  65. Heater voltage circuit change......why please
  66. EICO 147A operators manual
  67. Please Help My Tube Microphones!
  68. Magnetic Circuit Gurus Needed
  69. Tube Blues
  70. end of tube
  71. What is meant by 'Extended Cut-off'?
  72. How is it possible?
  73. best long life for my tube
  74. My first tube amp design...check it out.
  75. Tube driver for a SS power amplifier
  76. HK & world: with Cayin, are tube kits still good value (apart from learning)?
  77. www.thetubecenter.com = reliable?
  78. Lp values for guitar amp OT
  79. what do I replace...?
  80. Rectifiers: Tube vs Solid state..
  81. What can I do with 3Q4 Pentode tubes?
  82. DIY Powdered Core Progress Report
  83. PP output transformer grounded or not ?
  84. Bias supply question
  85. Minimum filament voltage for 300B
  86. Is it ok to combine output transformers?
  87. JE labs 2A3 evaluation
  88. 6sn7,6h30,6c33c ?
  89. signal ground and earth ground
  90. Recommended 6SN7 and 6SL7
  91. Question about BAT VK 75
  92. Please,a) cause of high pitched hum, b)DC wires twisted or not
  93. What kind of tube is this
  94. Tube Identification Help Please
  95. Balanced Load Design
  96. "lift off " or "Houston we have a problem"
  97. Anyone wound SE transformer for 6c33c-b?
  98. EL802 driving a 845 ?
  99. Diodes in series and hybrids
  100. Vacuum tube modeling software - beta testers wanted
  101. Parallel Push Pull Drivers
  102. 6V6 in triode connect mode
  103. OPT winding orientation
  104. 6.3v Heater Regulator Schematic
  105. An Important Read
  106. Did a real nice find
  107. New guy with DIY ground ?s--yes, even after searching:D
  108. 5u4g vs 5u4gb
  109. Tube amp volume fluctuation
  110. Bad tube?
  111. 1626's watt?
  112. fellow Hawkeye lookin' for cadman!
  113. Shuagang 2A3C
  114. Parallel SE vs. Single SE Output Question
  115. PP OPT Core dimension
  116. Confirmation of Primary Impedance?
  117. What does a hole on the guide pin of an octal base represent?
  118. Sepp?
  119. 6AS7 lowpower amp?
  120. Dual Mono PSU with shared earth..
  121. Breadboard 6C33C-B S.E.T
  122. audionote schematic wanted !!
  123. DIY Extreme performance Output Transformers - AMSOL
  124. Dressing up Ampex 2012 tube amps
  125. About McIntosh C22 power transformer
  126. it is almost alive
  127. Ef86, 6H30PI and 2 EL34
  128. 7868 tubes in Bogen CHB100
  129. DIY Powdered Iron Tranny Core
  130. Which BG cap best suited for cathode bypass?
  131. Oscillation question- pre or power?
  132. changing (de)coupling cap values
  133. opamp driving tubes
  134. tube 833a
  135. My latest Project (nightmare)
  136. output transformer primary imp. calculation
  137. rogers cadet mk3 hummm.....
  138. Someone help: SE shematic with GK71?
  139. Calling Graham Ingle of black cat electronics
  140. Old Emerson Tube Radio... great find!
  141. Fender princeton/champ clone
  142. E810F in triode
  143. GZ37 replacement?
  144. Bias adjustment question
  145. 6W Self Inverting 6BQ5 Amp
  146. Inductance a problem with wirewound pots?
  147. Fun circuit with a 12ax7 (ecc83)
  148. want to do PP-GM70
  149. spraying the guts of my amp...
  150. How to drop 10v from mains for 300b amp.
  151. SE Output Primary Impedence
  152. Different input valves for KT88
  153. EL84/6BQ5 LUXMAN Amps
  154. Heresy? Replacing tube rectifier w/Weber Copper Cap
  155. Direct Coupled Choke-assisted Mu-stage
  156. Another 845 SE
  157. Is it possible - 6922 Active X-over running with ~ +/- 40V ?
  158. 12FQ8's ?
  159. my first tube site
  160. different measurements
  161. DIY Dyna MK 2's and using bottlehead C4S
  162. Elektor ECL86 RIAA Preamp
  163. ECC88 - upgrading from Teonex - Help ?
  164. B+ problem?
  165. Realistic SAF 24c - Need some help
  166. what is the cap
  167. EAR 509 Mkii manual
  168. Where do you draw the line between tube and sand?
  169. Shinrock transformers
  170. OT: Anybody having problems getting to AA ? nt
  171. how much above B+ will voltage swing in OPT?
  172. bias meter and pot lead length
  173. 211 biasing voltages preferances
  174. Definitely NOT a Loftin-White!!
  175. Val MP 211 info wanted
  176. Look for EL33 PP structure circuit
  177. Rodding Bogen CHB-10A Mono Blocks
  178. two value tube amps for active DIY horns
  179. GEC 912+
  180. soon available as wrist watch.....
  181. Low sensitivity speakers and valvs, no nfb?
  182. Has anyone built this amp?
  183. Difference bewteen ultralinear & triode mode?
  184. 7586 nuvistor
  185. Valve Identification-Help
  186. KT 88 schematic search
  187. Bias the new power tube
  188. 6M6G Structure of the circuit
  189. I Think I Saw Heaven !
  190. Tron Syren
  191. extremely low output
  192. project suggestion with spare trans
  193. cinema amps
  194. c3g producing sparks
  195. Where to get transformer parts?
  196. penta labs
  197. Dynaco ST70 clone
  198. anyone tried the diy paradise simple el84 pp
  199. compression?
  200. 100V trannies as valve OPT
  201. 6bm8 / Ecl82 Pse & Srpp
  202. Lowther LL26 restoration
  203. Can I trust my Valve Tester
  204. (RCA) 6SN7 GTC spec?
  205. re: need help on Counterpoint SA5.1 preamp
  206. Why no CCS in PP output stage?
  207. 811-A amp
  208. DYNACO 120W AMP for DYNA A-451
  209. 35watts el34 amp schematic search ?
  210. tube
  211. My first design. PSE 211 to review.
  212. new 832 tubes?
  213. How to test a tube
  214. 50V line trafos for tube O/P?
  215. Distortion analysis mu follower
  216. the general radio experimenter
  217. resistor value, please
  218. PL519 PP design
  219. Dealers for output irons in EU wanted
  220. Any Twin Power triode Noval type?
  221. ARC SP9 Preamp voltages
  222. Power transformer
  223. OTL for Raven R2
  224. passive preamp (autoformer)
  225. How fragile are Sylvania 10Y tubes?
  226. SE 6SN7/813 direct coupling
  227. Riken Ohm Vs Kiwame
  228. Advantage of Valve Preamp?
  229. SiC Schottky rectifiers.
  230. 30 W from 6c33b?
  231. Built-in bleeder in ASC?
  232. 833 and GU-48
  233. Safety with high volts: 101
  234. Kofi Annan in: "B+... PLUS!!!"
  235. searching for darling tubes.
  236. Audio Research LS8 scheme
  237. My new pp KT88 design
  238. Tubepreamp and Zappulse?
  239. Comments on Transcendent Sound products
  240. regaring 833se
  241. Asc Oil Capacitors
  242. Buy Tubes
  243. Placement of power amp imput resistor
  244. Brimar EL34
  245. Elekit TU-870
  246. Tube amplifier mods
  247. Stromberg-Carlson project
  248. How to design the straight load line for choke loaded tube ?
  249. OPT failure modes
  250. Life of tubes - what to expect?

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