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  1. Simple Valve Preamplifier
  2. Current sourced heaters in a CF
  3. Tubes and music styles
  4. Cheap SE EL84
  5. Making a living out of tubes? (A little off-topic)
  6. EL84 matched pairs
  7. Tango XE20S voltage rating?
  8. power transformer heat
  9. Used Tube Amps, second life..
  10. Tubes
  11. Taylor 845
  12. AVO CT-160 Tube Tester - how to remove knobs?? - please help
  13. The DIYHifiSupply.com Joplin amplifier Kit
  14. Berning P-1 Preamp
  15. Which tube for OPT 7,5k SE low watts???
  16. help me with this puzzle...
  17. It makes me wonder ...
  18. Tubes operating in horizontal position
  19. Dewald radio N-803b keep or use parts?
  20. Ongaku
  21. PSU Design question
  22. Primary reactance of a parafeed OPT
  23. Info on IIT interstage trafos?
  24. vt25/10-Y or 45 tube
  25. 2a3, single plate-double plate?
  26. Preferred tube? KT88 vs. EL34
  27. You may laugh..but don't waste your time trying to dissuade me. 300B preamp.
  28. Parallelling power supply chokes???
  29. Sherwood S7000
  30. please explain plate curves
  31. Triode connected SV6550C with 500V HT
  32. KT88 SE schematic wanted.
  33. 6SN7 based tube buffer
  34. hum measurement
  35. Load of tubes to liquidate
  36. Unhappy with the Lilliput design
  37. Halving OPT's pri.imp. by connecting 8ohm load to 16ohm tap - Good/Bad?
  38. Tube Technology Prophet
  39. Cathode Feedback from Secondary for PP Amp
  40. Zenith Amplifier
  41. Dynaco SCA-35 fixer-upper
  42. Multiple primary power transformer question
  43. Sizing a Regulator
  44. will laziness burn my amp down?!
  45. resistors of a lower power rating
  46. wavy vibrato-like sound when amp cranked
  47. Rh34se?
  48. Ef86, 6n1p & 845pp
  49. HYBRID POWER AMPLIFIER - please help!
  50. 6528 Se
  51. single ended HiFi Regal stereo tube amplifier
  52. Matisse Line Amp
  53. changing longtail
  54. What do you think??????
  55. The amplifier itself whines
  56. DIY repair- replacing capacitors
  57. Benefits of 845B
  58. Counterpoint Preamp Modifications
  59. Humming Sovtek EF86
  60. Output Transformers
  61. RIAA phono stage
  62. The cathode FeedBack in Push-Pull amp
  63. What's a Field Coil Amplifier?
  64. HF filter inductors for signal path
  65. Different tube options for DCMB driver stage?
  66. Crowhurst paper on output xformer search
  67. Tamura inputs trans used as linestage out
  68. Seperate Amp for center channel
  69. Look for UL41 PP Structure!!
  70. Photoelectric valves?
  71. Bell Carrillon tube amp 6V6
  72. Yamamoto Sound Craft A-08 Amplifier
  73. Wanted Radford MA-15
  74. Beyond SET and ParaFeed.... Complementary Current Triode
  75. Too much gain
  76. 2 To 3 Prong Conversion
  77. 6c33 Set
  78. Svetlana MVSZ ---> cheat??
  79. separation of phono power supply for marantz m7 clone
  80. 300b Circuit Mod.
  81. james transformers
  82. ecc preamp schematics please!!!
  83. 845B problem
  84. 150W Garage sale find.
  85. speakers for class A ?
  86. Power Tx core should ground?
  87. First try, Would some one look over.
  88. Global Feedback in Push Pull Amps
  89. Heater voltage circuit change......why please
  90. EICO 147A operators manual
  91. Please Help My Tube Microphones!
  92. Magnetic Circuit Gurus Needed
  93. Tube Blues
  94. end of tube
  95. What is meant by 'Extended Cut-off'?
  96. How is it possible?
  97. best long life for my tube
  98. My first tube amp design...check it out.
  99. Tube driver for a SS power amplifier
  100. HK & world: with Cayin, are tube kits still good value (apart from learning)?
  101. www.thetubecenter.com = reliable?
  102. what do I replace...?
  103. Rectifiers: Tube vs Solid state..
  104. What can I do with 3Q4 Pentode tubes?
  105. DIY Powdered Core Progress Report
  106. PP output transformer grounded or not ?
  107. Bias supply question
  108. Minimum filament voltage for 300B
  109. Is it ok to combine output transformers?
  110. JE labs 2A3 evaluation
  111. 6sn7,6h30,6c33c ?
  112. signal ground and earth ground
  113. Recommended 6SN7 and 6SL7
  114. Question about BAT VK 75
  115. Please,a) cause of high pitched hum, b)DC wires twisted or not
  116. What kind of tube is this
  117. Tube Identification Help Please
  118. Balanced Load Design
  119. "lift off " or "Houston we have a problem"
  120. Anyone wound SE transformer for 6c33c-b?
  121. EL802 driving a 845 ?
  122. Diodes in series and hybrids
  123. Vacuum tube modeling software - beta testers wanted
  124. Parallel Push Pull Drivers
  125. 6V6 in triode connect mode
  126. OPT winding orientation
  127. 6.3v Heater Regulator Schematic
  128. An Important Read
  129. Did a real nice find
  130. New guy with DIY ground ?s--yes, even after searching:D
  131. 5u4g vs 5u4gb
  132. Tube amp volume fluctuation
  133. Bad tube?
  134. 1626's watt?
  135. fellow Hawkeye lookin' for cadman!
  136. Shuagang 2A3C
  137. Parallel SE vs. Single SE Output Question
  138. PP OPT Core dimension
  139. Confirmation of Primary Impedance?
  140. What does a hole on the guide pin of an octal base represent?
  141. Sepp?
  142. 6AS7 lowpower amp?
  143. Dual Mono PSU with shared earth..
  144. Breadboard 6C33C-B S.E.T
  145. audionote schematic wanted !!
  146. DIY Extreme performance Output Transformers - AMSOL
  147. Dressing up Ampex 2012 tube amps
  148. About McIntosh C22 power transformer
  149. it is almost alive
  150. Ef86, 6H30PI and 2 EL34
  151. 7868 tubes in Bogen CHB100
  152. DIY Powdered Iron Tranny Core
  153. Which BG cap best suited for cathode bypass?
  154. Oscillation question- pre or power?
  155. changing (de)coupling cap values
  156. opamp driving tubes
  157. tube 833a
  158. My latest Project (nightmare)
  159. output transformer primary imp. calculation
  160. rogers cadet mk3 hummm.....
  161. Someone help: SE shematic with GK71?
  162. Calling Graham Ingle of black cat electronics
  163. Old Emerson Tube Radio... great find!
  164. E810F in triode
  165. GZ37 replacement?
  166. Bias adjustment question
  167. 6W Self Inverting 6BQ5 Amp
  168. Inductance a problem with wirewound pots?
  169. Fun circuit with a 12ax7 (ecc83)
  170. want to do PP-GM70
  171. spraying the guts of my amp...
  172. How to drop 10v from mains for 300b amp.
  173. SE Output Primary Impedence
  174. Different input valves for KT88
  175. EL84/6BQ5 LUXMAN Amps
  176. Heresy? Replacing tube rectifier w/Weber Copper Cap
  177. Direct Coupled Choke-assisted Mu-stage
  178. Another 845 SE
  179. Is it possible - 6922 Active X-over running with ~ +/- 40V ?
  180. 12FQ8's ?
  181. my first tube site
  182. different measurements
  183. DIY Dyna MK 2's and using bottlehead C4S
  184. Elektor ECL86 RIAA Preamp
  185. ECC88 - upgrading from Teonex - Help ?
  186. B+ problem?
  187. Realistic SAF 24c - Need some help
  188. what is the cap
  189. EAR 509 Mkii manual
  190. Where do you draw the line between tube and sand?
  191. Shinrock transformers
  192. OT: Anybody having problems getting to AA ? nt
  193. how much above B+ will voltage swing in OPT?
  194. bias meter and pot lead length
  195. 211 biasing voltages preferances
  196. Definitely NOT a Loftin-White!!
  197. Val MP 211 info wanted
  198. Look for EL33 PP structure circuit
  199. Rodding Bogen CHB-10A Mono Blocks
  200. two value tube amps for active DIY horns
  201. GEC 912+
  202. soon available as wrist watch.....
  203. Low sensitivity speakers and valvs, no nfb?
  204. Has anyone built this amp?
  205. Difference bewteen ultralinear & triode mode?
  206. 7586 nuvistor
  207. Valve Identification-Help
  208. KT 88 schematic search
  209. Bias the new power tube
  210. 6M6G Structure of the circuit
  211. I Think I Saw Heaven !
  212. Tron Syren
  213. extremely low output
  214. project suggestion with spare trans
  215. cinema amps
  216. c3g producing sparks
  217. Where to get transformer parts?
  218. penta labs
  219. Dynaco ST70 clone
  220. anyone tried the diy paradise simple el84 pp
  221. compression?
  222. 100V trannies as valve OPT
  223. 6bm8 / Ecl82 Pse & Srpp
  224. Lowther LL26 restoration
  225. Can I trust my Valve Tester
  226. (RCA) 6SN7 GTC spec?
  227. re: need help on Counterpoint SA5.1 preamp
  228. Why no CCS in PP output stage?
  229. 811-A amp
  230. DYNACO 120W AMP for DYNA A-451
  231. 35watts el34 amp schematic search ?
  232. tube
  233. My first design. PSE 211 to review.
  234. new 832 tubes?
  235. How to test a tube
  236. 50V line trafos for tube O/P?
  237. Distortion analysis mu follower
  238. the general radio experimenter
  239. resistor value, please
  240. PL519 PP design
  241. Dealers for output irons in EU wanted
  242. Any Twin Power triode Noval type?
  243. ARC SP9 Preamp voltages
  244. Power transformer
  245. OTL for Raven R2
  246. passive preamp (autoformer)
  247. How fragile are Sylvania 10Y tubes?
  248. SE 6SN7/813 direct coupling
  249. Riken Ohm Vs Kiwame
  250. Advantage of Valve Preamp?

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