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  1. power transformer heat
  2. Used Tube Amps, second life..
  3. Tubes
  4. Taylor 845
  5. AVO CT-160 Tube Tester - how to remove knobs?? - please help
  6. The DIYHifiSupply.com Joplin amplifier Kit
  7. Berning P-1 Preamp
  8. Which tube for OPT 7,5k SE low watts???
  9. help me with this puzzle...
  10. Univox 1501 Fried Resistors
  11. It makes me wonder ...
  12. Tubes operating in horizontal position
  13. Dewald radio N-803b keep or use parts?
  14. Ongaku
  15. PSU Design question
  16. Primary reactance of a parafeed OPT
  17. Info on IIT interstage trafos?
  18. vt25/10-Y or 45 tube
  19. 2a3, single plate-double plate?
  20. Preferred tube? KT88 vs. EL34
  21. You may laugh..but don't waste your time trying to dissuade me. 300B preamp.
  22. Parallelling power supply chokes???
  23. Sherwood S7000
  24. please explain plate curves
  25. Triode connected SV6550C with 500V HT
  26. KT88 SE schematic wanted.
  27. 6SN7 based tube buffer
  28. hum measurement
  29. Load of tubes to liquidate
  30. Unhappy with the Lilliput design
  31. Halving OPT's pri.imp. by connecting 8ohm load to 16ohm tap - Good/Bad?
  32. Tube Technology Prophet
  33. Cathode Feedback from Secondary for PP Amp
  34. Zenith Amplifier
  35. Dynaco SCA-35 fixer-upper
  36. Multiple primary power transformer question
  37. Sizing a Regulator
  38. will laziness burn my amp down?!
  39. resistors of a lower power rating
  40. wavy vibrato-like sound when amp cranked
  41. Rh34se?
  42. Ef86, 6n1p & 845pp
  43. HYBRID POWER AMPLIFIER - please help!
  44. 6528 Se
  45. single ended HiFi Regal stereo tube amplifier
  46. Matisse Line Amp
  47. changing longtail
  48. What do you think??????
  49. The amplifier itself whines
  50. DIY repair- replacing capacitors
  51. Benefits of 845B
  52. Counterpoint Preamp Modifications
  53. Humming Sovtek EF86
  54. Output Transformers
  55. RIAA phono stage
  56. The cathode FeedBack in Push-Pull amp
  57. What's a Field Coil Amplifier?
  58. Need help for ampeg tube amp transformers ...
  59. HF filter inductors for signal path
  60. Different tube options for DCMB driver stage?
  61. Crowhurst paper on output xformer search
  62. Tamura inputs trans used as linestage out
  63. Seperate Amp for center channel
  64. Look for UL41 PP Structure!!
  65. Photoelectric valves?
  66. Bell Carrillon tube amp 6V6
  67. Yamamoto Sound Craft A-08 Amplifier
  68. Wanted Radford MA-15
  69. Beyond SET and ParaFeed.... Complementary Current Triode
  70. Too much gain
  71. 2 To 3 Prong Conversion
  72. 6c33 Set
  73. Svetlana MVSZ ---> cheat??
  74. separation of phono power supply for marantz m7 clone
  75. 300b Circuit Mod.
  76. james transformers
  77. ecc preamp schematics please!!!
  78. 845B problem
  79. 150W Garage sale find.
  80. speakers for class A ?
  81. Power Tx core should ground?
  82. First try, Would some one look over.
  83. Global Feedback in Push Pull Amps
  84. Heater voltage circuit change......why please
  85. EICO 147A operators manual
  86. Please Help My Tube Microphones!
  87. Magnetic Circuit Gurus Needed
  88. Tube Blues
  89. end of tube
  90. What is meant by 'Extended Cut-off'?
  91. How is it possible?
  92. best long life for my tube
  93. My first tube amp design...check it out.
  94. Tube driver for a SS power amplifier
  95. HK & world: with Cayin, are tube kits still good value (apart from learning)?
  96. www.thetubecenter.com = reliable?
  97. Lp values for guitar amp OT
  98. what do I replace...?
  99. Rectifiers: Tube vs Solid state..
  100. What can I do with 3Q4 Pentode tubes?
  101. DIY Powdered Core Progress Report
  102. PP output transformer grounded or not ?
  103. Bias supply question
  104. Minimum filament voltage for 300B
  105. Is it ok to combine output transformers?
  106. JE labs 2A3 evaluation
  107. 6sn7,6h30,6c33c ?
  108. signal ground and earth ground
  109. Recommended 6SN7 and 6SL7
  110. Question about BAT VK 75
  111. Please,a) cause of high pitched hum, b)DC wires twisted or not
  112. What kind of tube is this
  113. Tube Identification Help Please
  114. Balanced Load Design
  115. "lift off " or "Houston we have a problem"
  116. Anyone wound SE transformer for 6c33c-b?
  117. EL802 driving a 845 ?
  118. Diodes in series and hybrids
  119. Vacuum tube modeling software - beta testers wanted
  120. Parallel Push Pull Drivers
  121. 6V6 in triode connect mode
  122. OPT winding orientation
  123. 6.3v Heater Regulator Schematic
  124. An Important Read
  125. Did a real nice find
  126. New guy with DIY ground ?s--yes, even after searching:D
  127. 5u4g vs 5u4gb
  128. Tube amp volume fluctuation
  129. Bad tube?
  130. 1626's watt?
  131. fellow Hawkeye lookin' for cadman!
  132. Shuagang 2A3C
  133. Parallel SE vs. Single SE Output Question
  134. PP OPT Core dimension
  135. Confirmation of Primary Impedance?
  136. What does a hole on the guide pin of an octal base represent?
  137. Sepp?
  138. 6AS7 lowpower amp?
  139. Dual Mono PSU with shared earth..
  140. Breadboard 6C33C-B S.E.T
  141. audionote schematic wanted !!
  142. DIY Extreme performance Output Transformers - AMSOL
  143. Dressing up Ampex 2012 tube amps
  144. About McIntosh C22 power transformer
  145. it is almost alive
  146. Ef86, 6H30PI and 2 EL34
  147. 7868 tubes in Bogen CHB100
  148. DIY Powdered Iron Tranny Core
  149. Which BG cap best suited for cathode bypass?
  150. Oscillation question- pre or power?
  151. changing (de)coupling cap values
  152. opamp driving tubes
  153. tube 833a
  154. My latest Project (nightmare)
  155. output transformer primary imp. calculation
  156. rogers cadet mk3 hummm.....
  157. Someone help: SE shematic with GK71?
  158. Calling Graham Ingle of black cat electronics
  159. Old Emerson Tube Radio... great find!
  160. Fender princeton/champ clone
  161. E810F in triode
  162. GZ37 replacement?
  163. Bias adjustment question
  164. 6W Self Inverting 6BQ5 Amp
  165. Inductance a problem with wirewound pots?
  166. Fun circuit with a 12ax7 (ecc83)
  167. want to do PP-GM70
  168. spraying the guts of my amp...
  169. How to drop 10v from mains for 300b amp.
  170. SE Output Primary Impedence
  171. Different input valves for KT88
  172. EL84/6BQ5 LUXMAN Amps
  173. Heresy? Replacing tube rectifier w/Weber Copper Cap
  174. Direct Coupled Choke-assisted Mu-stage
  175. Another 845 SE
  176. Is it possible - 6922 Active X-over running with ~ +/- 40V ?
  177. 12FQ8's ?
  178. my first tube site
  179. different measurements
  180. DIY Dyna MK 2's and using bottlehead C4S
  181. Elektor ECL86 RIAA Preamp
  182. ECC88 - upgrading from Teonex - Help ?
  183. B+ problem?
  184. Realistic SAF 24c - Need some help
  185. what is the cap
  186. EAR 509 Mkii manual
  187. Where do you draw the line between tube and sand?
  188. Shinrock transformers
  189. OT: Anybody having problems getting to AA ? nt
  190. how much above B+ will voltage swing in OPT?
  191. bias meter and pot lead length
  192. 211 biasing voltages preferances
  193. Definitely NOT a Loftin-White!!
  194. Val MP 211 info wanted
  195. Look for EL33 PP structure circuit
  196. Rodding Bogen CHB-10A Mono Blocks
  197. two value tube amps for active DIY horns
  198. GEC 912+
  199. soon available as wrist watch.....
  200. Low sensitivity speakers and valvs, no nfb?
  201. Has anyone built this amp?
  202. Difference bewteen ultralinear & triode mode?
  203. 7586 nuvistor
  204. Valve Identification-Help
  205. KT 88 schematic search
  206. Bias the new power tube
  207. 6M6G Structure of the circuit
  208. I Think I Saw Heaven !
  209. Tron Syren
  210. extremely low output
  211. project suggestion with spare trans
  212. cinema amps
  213. c3g producing sparks
  214. Where to get transformer parts?
  215. penta labs
  216. Dynaco ST70 clone
  217. anyone tried the diy paradise simple el84 pp
  218. compression?
  219. 100V trannies as valve OPT
  220. 6bm8 / Ecl82 Pse & Srpp
  221. Lowther LL26 restoration
  222. Can I trust my Valve Tester
  223. (RCA) 6SN7 GTC spec?
  224. re: need help on Counterpoint SA5.1 preamp
  225. Why no CCS in PP output stage?
  226. 811-A amp
  227. DYNACO 120W AMP for DYNA A-451
  228. 35watts el34 amp schematic search ?
  229. tube
  230. My first design. PSE 211 to review.
  231. new 832 tubes?
  232. How to test a tube
  233. 50V line trafos for tube O/P?
  234. Distortion analysis mu follower
  235. the general radio experimenter
  236. resistor value, please
  237. PL519 PP design
  238. Dealers for output irons in EU wanted
  239. Any Twin Power triode Noval type?
  240. ARC SP9 Preamp voltages
  241. Power transformer
  242. OTL for Raven R2
  243. passive preamp (autoformer)
  244. How fragile are Sylvania 10Y tubes?
  245. SE 6SN7/813 direct coupling
  246. Riken Ohm Vs Kiwame
  247. Advantage of Valve Preamp?
  248. SiC Schottky rectifiers.
  249. 30 W from 6c33b?
  250. Built-in bleeder in ASC?

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