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  1. What's a Field Coil Amplifier?
  2. HF filter inductors for signal path
  3. Different tube options for DCMB driver stage?
  4. Crowhurst paper on output xformer search
  5. Tamura inputs trans used as linestage out
  6. Seperate Amp for center channel
  7. Look for UL41 PP Structure!!
  8. Photoelectric valves?
  9. Bell Carrillon tube amp 6V6
  10. Yamamoto Sound Craft A-08 Amplifier
  11. Wanted Radford MA-15
  12. Beyond SET and ParaFeed.... Complementary Current Triode
  13. Too much gain
  14. 2 To 3 Prong Conversion
  15. 6c33 Set
  16. Svetlana MVSZ ---> cheat??
  17. separation of phono power supply for marantz m7 clone
  18. 300b Circuit Mod.
  19. james transformers
  20. ecc preamp schematics please!!!
  21. 845B problem
  22. 150W Garage sale find.
  23. speakers for class A ?
  24. Power Tx core should ground?
  25. First try, Would some one look over.
  26. Global Feedback in Push Pull Amps
  27. Heater voltage circuit change......why please
  28. EICO 147A operators manual
  29. Please Help My Tube Microphones!
  30. Magnetic Circuit Gurus Needed
  31. Tube Blues
  32. end of tube
  33. What is meant by 'Extended Cut-off'?
  34. How is it possible?
  35. best long life for my tube
  36. My first tube amp design...check it out.
  37. Tube driver for a SS power amplifier
  38. HK & world: with Cayin, are tube kits still good value (apart from learning)?
  39. www.thetubecenter.com = reliable?
  40. what do I replace...?
  41. Rectifiers: Tube vs Solid state..
  42. What can I do with 3Q4 Pentode tubes?
  43. DIY Powdered Core Progress Report
  44. PP output transformer grounded or not ?
  45. Bias supply question
  46. Minimum filament voltage for 300B
  47. Is it ok to combine output transformers?
  48. JE labs 2A3 evaluation
  49. 6sn7,6h30,6c33c ?
  50. signal ground and earth ground
  51. Recommended 6SN7 and 6SL7
  52. Question about BAT VK 75
  53. Please,a) cause of high pitched hum, b)DC wires twisted or not
  54. What kind of tube is this
  55. Tube Identification Help Please
  56. Balanced Load Design
  57. "lift off " or "Houston we have a problem"
  58. Anyone wound SE transformer for 6c33c-b?
  59. EL802 driving a 845 ?
  60. Diodes in series and hybrids
  61. Vacuum tube modeling software - beta testers wanted
  62. Parallel Push Pull Drivers
  63. 6V6 in triode connect mode
  64. OPT winding orientation
  65. 6.3v Heater Regulator Schematic
  66. An Important Read
  67. Did a real nice find
  68. New guy with DIY ground ?s--yes, even after searching:D
  69. 5u4g vs 5u4gb
  70. Tube amp volume fluctuation
  71. Bad tube?
  72. 1626's watt?
  73. fellow Hawkeye lookin' for cadman!
  74. Shuagang 2A3C
  75. Parallel SE vs. Single SE Output Question
  76. PP OPT Core dimension
  77. Confirmation of Primary Impedance?
  78. What does a hole on the guide pin of an octal base represent?
  79. Sepp?
  80. 6AS7 lowpower amp?
  81. Dual Mono PSU with shared earth..
  82. Breadboard 6C33C-B S.E.T
  83. audionote schematic wanted !!
  84. DIY Extreme performance Output Transformers - AMSOL
  85. Dressing up Ampex 2012 tube amps
  86. About McIntosh C22 power transformer
  87. it is almost alive
  88. Ef86, 6H30PI and 2 EL34
  89. 7868 tubes in Bogen CHB100
  90. DIY Powdered Iron Tranny Core
  91. Which BG cap best suited for cathode bypass?
  92. Oscillation question- pre or power?
  93. changing (de)coupling cap values
  94. opamp driving tubes
  95. tube 833a
  96. My latest Project (nightmare)
  97. output transformer primary imp. calculation
  98. rogers cadet mk3 hummm.....
  99. Someone help: SE shematic with GK71?
  100. Calling Graham Ingle of black cat electronics
  101. Old Emerson Tube Radio... great find!
  102. E810F in triode
  103. GZ37 replacement?
  104. Bias adjustment question
  105. 6W Self Inverting 6BQ5 Amp
  106. Inductance a problem with wirewound pots?
  107. Fun circuit with a 12ax7 (ecc83)
  108. want to do PP-GM70
  109. spraying the guts of my amp...
  110. How to drop 10v from mains for 300b amp.
  111. SE Output Primary Impedence
  112. Different input valves for KT88
  113. EL84/6BQ5 LUXMAN Amps
  114. Heresy? Replacing tube rectifier w/Weber Copper Cap
  115. Direct Coupled Choke-assisted Mu-stage
  116. Another 845 SE
  117. Is it possible - 6922 Active X-over running with ~ +/- 40V ?
  118. 12FQ8's ?
  119. my first tube site
  120. different measurements
  121. DIY Dyna MK 2's and using bottlehead C4S
  122. Elektor ECL86 RIAA Preamp
  123. ECC88 - upgrading from Teonex - Help ?
  124. B+ problem?
  125. Realistic SAF 24c - Need some help
  126. what is the cap
  127. EAR 509 Mkii manual
  128. Where do you draw the line between tube and sand?
  129. Shinrock transformers
  130. OT: Anybody having problems getting to AA ? nt
  131. how much above B+ will voltage swing in OPT?
  132. bias meter and pot lead length
  133. 211 biasing voltages preferances
  134. Definitely NOT a Loftin-White!!
  135. Val MP 211 info wanted
  136. Look for EL33 PP structure circuit
  137. Rodding Bogen CHB-10A Mono Blocks
  138. two value tube amps for active DIY horns
  139. GEC 912+
  140. soon available as wrist watch.....
  141. Low sensitivity speakers and valvs, no nfb?
  142. Has anyone built this amp?
  143. Difference bewteen ultralinear & triode mode?
  144. 7586 nuvistor
  145. Valve Identification-Help
  146. KT 88 schematic search
  147. Bias the new power tube
  148. 6M6G Structure of the circuit
  149. I Think I Saw Heaven !
  150. Tron Syren
  151. extremely low output
  152. project suggestion with spare trans
  153. cinema amps
  154. c3g producing sparks
  155. Where to get transformer parts?
  156. penta labs
  157. Dynaco ST70 clone
  158. anyone tried the diy paradise simple el84 pp
  159. compression?
  160. 100V trannies as valve OPT
  161. 6bm8 / Ecl82 Pse & Srpp
  162. Lowther LL26 restoration
  163. Can I trust my Valve Tester
  164. (RCA) 6SN7 GTC spec?
  165. re: need help on Counterpoint SA5.1 preamp
  166. Why no CCS in PP output stage?
  167. 811-A amp
  168. DYNACO 120W AMP for DYNA A-451
  169. 35watts el34 amp schematic search ?
  170. tube
  171. My first design. PSE 211 to review.
  172. new 832 tubes?
  173. How to test a tube
  174. 50V line trafos for tube O/P?
  175. Distortion analysis mu follower
  176. the general radio experimenter
  177. resistor value, please
  178. PL519 PP design
  179. Dealers for output irons in EU wanted
  180. Any Twin Power triode Noval type?
  181. ARC SP9 Preamp voltages
  182. Power transformer
  183. OTL for Raven R2
  184. passive preamp (autoformer)
  185. How fragile are Sylvania 10Y tubes?
  186. SE 6SN7/813 direct coupling
  187. Riken Ohm Vs Kiwame
  188. Advantage of Valve Preamp?
  189. SiC Schottky rectifiers.
  190. 30 W from 6c33b?
  191. Built-in bleeder in ASC?
  192. 833 and GU-48
  193. Safety with high volts: 101
  194. Kofi Annan in: "B+... PLUS!!!"
  195. searching for darling tubes.
  196. Audio Research LS8 scheme
  197. My new pp KT88 design
  198. Tubepreamp and Zappulse?
  199. Comments on Transcendent Sound products
  200. regaring 833se
  201. Asc Oil Capacitors
  202. Buy Tubes
  203. Placement of power amp imput resistor
  204. Brimar EL34
  205. Elekit TU-870
  206. Tube amplifier mods
  207. Stromberg-Carlson project
  208. How to design the straight load line for choke loaded tube ?
  209. OPT failure modes
  210. Life of tubes - what to expect?
  211. Profiteering from Gordan Rankin Designs
  212. Gain/Schematic Question
  213. Heath Distortion Measurement Set HD-1
  214. Tube troubleshooting question
  215. Speaker tube amp with headphones
  216. Gain of 6AK5
  217. R vs. RC on secondaries
  218. My simple 5010 amplifiers
  219. constant current sources...
  220. Critical resistors
  221. Digital tube designs?
  222. 2A3 SE Amp
  223. Dact closeout
  224. Mysterious runaway output tube
  225. Ampex 351 Power Transformer
  226. better the Pass camp?
  227. My first tube amp kit.
  228. Plate Resistor
  229. EZ81 tube rectifier
  230. 4K:10K interstage
  231. DIY in New York City
  232. dead project, new life?
  233. Interesting Read On 300B's
  234. Low voltage tubes
  235. Perser SA20 Restoration
  236. IP headroom with LTP splitter
  237. Triode strapping 6l6gc PP
  238. Question on design
  239. pin outs on Hammond tube amp?
  240. cathode follower
  241. Positive feedback online issue #16
  242. el84 help
  243. RIAA help
  244. Advise for my first tube amplifier, please
  245. My 50/10Y amp with hybrid PSU... am I doing the standby switch right?
  246. What can I build with this iron?
  247. Hey Planet_10 (and others)
  248. Tube sockets for Harmon-K Citation II
  249. Question on ZZ-1000/8228
  250. noise analysis

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