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  1. Dynaco SCA-35 fixer-upper
  2. Multiple primary power transformer question
  3. Sizing a Regulator
  4. will laziness burn my amp down?!
  5. resistors of a lower power rating
  6. wavy vibrato-like sound when amp cranked
  7. Rh34se?
  8. Ef86, 6n1p & 845pp
  9. HYBRID POWER AMPLIFIER - please help!
  10. 6528 Se
  11. single ended HiFi Regal stereo tube amplifier
  12. Matisse Line Amp
  13. changing longtail
  14. What do you think??????
  15. The amplifier itself whines
  16. DIY repair- replacing capacitors
  17. Benefits of 845B
  18. Counterpoint Preamp Modifications
  19. Humming Sovtek EF86
  20. Output Transformers
  21. RIAA phono stage
  22. The cathode FeedBack in Push-Pull amp
  23. What's a Field Coil Amplifier?
  24. Need help for ampeg tube amp transformers ...
  25. HF filter inductors for signal path
  26. Different tube options for DCMB driver stage?
  27. Crowhurst paper on output xformer search
  28. Tamura inputs trans used as linestage out
  29. Seperate Amp for center channel
  30. Look for UL41 PP Structure!!
  31. Photoelectric valves?
  32. Bell Carrillon tube amp 6V6
  33. Yamamoto Sound Craft A-08 Amplifier
  34. Wanted Radford MA-15
  35. Beyond SET and ParaFeed.... Complementary Current Triode
  36. Too much gain
  37. 2 To 3 Prong Conversion
  38. 6c33 Set
  39. Svetlana MVSZ ---> cheat??
  40. separation of phono power supply for marantz m7 clone
  41. 300b Circuit Mod.
  42. james transformers
  43. ecc preamp schematics please!!!
  44. 845B problem
  45. 150W Garage sale find.
  46. speakers for class A ?
  47. Power Tx core should ground?
  48. First try, Would some one look over.
  49. Global Feedback in Push Pull Amps
  50. Heater voltage circuit change......why please
  51. EICO 147A operators manual
  52. Please Help My Tube Microphones!
  53. Magnetic Circuit Gurus Needed
  54. Tube Blues
  55. end of tube
  56. What is meant by 'Extended Cut-off'?
  57. How is it possible?
  58. best long life for my tube
  59. My first tube amp design...check it out.
  60. Tube driver for a SS power amplifier
  61. HK & world: with Cayin, are tube kits still good value (apart from learning)?
  62. www.thetubecenter.com = reliable?
  63. Lp values for guitar amp OT
  64. what do I replace...?
  65. Rectifiers: Tube vs Solid state..
  66. What can I do with 3Q4 Pentode tubes?
  67. DIY Powdered Core Progress Report
  68. PP output transformer grounded or not ?
  69. Bias supply question
  70. Minimum filament voltage for 300B
  71. Is it ok to combine output transformers?
  72. JE labs 2A3 evaluation
  73. 6sn7,6h30,6c33c ?
  74. signal ground and earth ground
  75. Recommended 6SN7 and 6SL7
  76. Question about BAT VK 75
  77. Please,a) cause of high pitched hum, b)DC wires twisted or not
  78. What kind of tube is this
  79. Tube Identification Help Please
  80. Balanced Load Design
  81. "lift off " or "Houston we have a problem"
  82. Anyone wound SE transformer for 6c33c-b?
  83. EL802 driving a 845 ?
  84. Diodes in series and hybrids
  85. Vacuum tube modeling software - beta testers wanted
  86. Parallel Push Pull Drivers
  87. 6V6 in triode connect mode
  88. OPT winding orientation
  89. 6.3v Heater Regulator Schematic
  90. An Important Read
  91. Did a real nice find
  92. New guy with DIY ground ?s--yes, even after searching:D
  93. 5u4g vs 5u4gb
  94. Tube amp volume fluctuation
  95. Bad tube?
  96. 1626's watt?
  97. fellow Hawkeye lookin' for cadman!
  98. Shuagang 2A3C
  99. Parallel SE vs. Single SE Output Question
  100. PP OPT Core dimension
  101. Confirmation of Primary Impedance?
  102. What does a hole on the guide pin of an octal base represent?
  103. Sepp?
  104. 6AS7 lowpower amp?
  105. Dual Mono PSU with shared earth..
  106. Breadboard 6C33C-B S.E.T
  107. audionote schematic wanted !!
  108. DIY Extreme performance Output Transformers - AMSOL
  109. Dressing up Ampex 2012 tube amps
  110. About McIntosh C22 power transformer
  111. it is almost alive
  112. Ef86, 6H30PI and 2 EL34
  113. 7868 tubes in Bogen CHB100
  114. DIY Powdered Iron Tranny Core
  115. Which BG cap best suited for cathode bypass?
  116. Oscillation question- pre or power?
  117. changing (de)coupling cap values
  118. opamp driving tubes
  119. tube 833a
  120. My latest Project (nightmare)
  121. output transformer primary imp. calculation
  122. rogers cadet mk3 hummm.....
  123. Someone help: SE shematic with GK71?
  124. Calling Graham Ingle of black cat electronics
  125. Old Emerson Tube Radio... great find!
  126. Fender princeton/champ clone
  127. E810F in triode
  128. GZ37 replacement?
  129. Bias adjustment question
  130. 6W Self Inverting 6BQ5 Amp
  131. Inductance a problem with wirewound pots?
  132. Fun circuit with a 12ax7 (ecc83)
  133. want to do PP-GM70
  134. spraying the guts of my amp...
  135. How to drop 10v from mains for 300b amp.
  136. SE Output Primary Impedence
  137. Different input valves for KT88
  138. EL84/6BQ5 LUXMAN Amps
  139. Heresy? Replacing tube rectifier w/Weber Copper Cap
  140. Direct Coupled Choke-assisted Mu-stage
  141. Another 845 SE
  142. Is it possible - 6922 Active X-over running with ~ +/- 40V ?
  143. 12FQ8's ?
  144. my first tube site
  145. different measurements
  146. DIY Dyna MK 2's and using bottlehead C4S
  147. Elektor ECL86 RIAA Preamp
  148. ECC88 - upgrading from Teonex - Help ?
  149. B+ problem?
  150. Realistic SAF 24c - Need some help
  151. what is the cap
  152. EAR 509 Mkii manual
  153. Where do you draw the line between tube and sand?
  154. Shinrock transformers
  155. OT: Anybody having problems getting to AA ? nt
  156. how much above B+ will voltage swing in OPT?
  157. bias meter and pot lead length
  158. 211 biasing voltages preferances
  159. Definitely NOT a Loftin-White!!
  160. Val MP 211 info wanted
  161. Look for EL33 PP structure circuit
  162. Rodding Bogen CHB-10A Mono Blocks
  163. two value tube amps for active DIY horns
  164. GEC 912+
  165. soon available as wrist watch.....
  166. Low sensitivity speakers and valvs, no nfb?
  167. Has anyone built this amp?
  168. Difference bewteen ultralinear & triode mode?
  169. 7586 nuvistor
  170. Valve Identification-Help
  171. KT 88 schematic search
  172. Bias the new power tube
  173. 6M6G Structure of the circuit
  174. I Think I Saw Heaven !
  175. Tron Syren
  176. extremely low output
  177. project suggestion with spare trans
  178. cinema amps
  179. c3g producing sparks
  180. Where to get transformer parts?
  181. penta labs
  182. Dynaco ST70 clone
  183. anyone tried the diy paradise simple el84 pp
  184. compression?
  185. 100V trannies as valve OPT
  186. 6bm8 / Ecl82 Pse & Srpp
  187. Lowther LL26 restoration
  188. Can I trust my Valve Tester
  189. (RCA) 6SN7 GTC spec?
  190. re: need help on Counterpoint SA5.1 preamp
  191. Why no CCS in PP output stage?
  192. 811-A amp
  193. DYNACO 120W AMP for DYNA A-451
  194. 35watts el34 amp schematic search ?
  195. tube
  196. My first design. PSE 211 to review.
  197. new 832 tubes?
  198. How to test a tube
  199. 50V line trafos for tube O/P?
  200. Distortion analysis mu follower
  201. the general radio experimenter
  202. resistor value, please
  203. PL519 PP design
  204. Dealers for output irons in EU wanted
  205. Any Twin Power triode Noval type?
  206. ARC SP9 Preamp voltages
  207. Power transformer
  208. OTL for Raven R2
  209. passive preamp (autoformer)
  210. How fragile are Sylvania 10Y tubes?
  211. SE 6SN7/813 direct coupling
  212. Riken Ohm Vs Kiwame
  213. Advantage of Valve Preamp?
  214. SiC Schottky rectifiers.
  215. 30 W from 6c33b?
  216. Built-in bleeder in ASC?
  217. 833 and GU-48
  218. Safety with high volts: 101
  219. Kofi Annan in: "B+... PLUS!!!"
  220. searching for darling tubes.
  221. Audio Research LS8 scheme
  222. My new pp KT88 design
  223. Tubepreamp and Zappulse?
  224. Comments on Transcendent Sound products
  225. regaring 833se
  226. Asc Oil Capacitors
  227. Buy Tubes
  228. Placement of power amp imput resistor
  229. Brimar EL34
  230. Elekit TU-870
  231. Tube amplifier mods
  232. Stromberg-Carlson project
  233. How to design the straight load line for choke loaded tube ?
  234. OPT failure modes
  235. Life of tubes - what to expect?
  236. Profiteering from Gordan Rankin Designs
  237. Gain/Schematic Question
  238. Heath Distortion Measurement Set HD-1
  239. Tube troubleshooting question
  240. Speaker tube amp with headphones
  241. Gain of 6AK5
  242. R vs. RC on secondaries
  243. My simple 5010 amplifiers
  244. constant current sources...
  245. Critical resistors
  246. Digital tube designs?
  247. 2A3 SE Amp
  248. Dact closeout
  249. Mysterious runaway output tube
  250. Ampex 351 Power Transformer

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