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  1. separation of phono power supply for marantz m7 clone
  2. 300b Circuit Mod.
  3. james transformers
  4. ecc preamp schematics please!!!
  5. 845B problem
  6. 150W Garage sale find.
  7. speakers for class A ?
  8. Power Tx core should ground?
  9. First try, Would some one look over.
  10. Global Feedback in Push Pull Amps
  11. Heater voltage circuit change......why please
  12. EICO 147A operators manual
  13. Please Help My Tube Microphones!
  14. Magnetic Circuit Gurus Needed
  15. Tube Blues
  16. end of tube
  17. What is meant by 'Extended Cut-off'?
  18. How is it possible?
  19. best long life for my tube
  20. My first tube amp design...check it out.
  21. Tube driver for a SS power amplifier
  22. HK & world: with Cayin, are tube kits still good value (apart from learning)?
  23. www.thetubecenter.com = reliable?
  24. Lp values for guitar amp OT
  25. what do I replace...?
  26. Rectifiers: Tube vs Solid state..
  27. What can I do with 3Q4 Pentode tubes?
  28. DIY Powdered Core Progress Report
  29. PP output transformer grounded or not ?
  30. Bias supply question
  31. Minimum filament voltage for 300B
  32. Is it ok to combine output transformers?
  33. JE labs 2A3 evaluation
  34. 6sn7,6h30,6c33c ?
  35. signal ground and earth ground
  36. Recommended 6SN7 and 6SL7
  37. Question about BAT VK 75
  38. Please,a) cause of high pitched hum, b)DC wires twisted or not
  39. What kind of tube is this
  40. Tube Identification Help Please
  41. Balanced Load Design
  42. "lift off " or "Houston we have a problem"
  43. Anyone wound SE transformer for 6c33c-b?
  44. EL802 driving a 845 ?
  45. Diodes in series and hybrids
  46. Vacuum tube modeling software - beta testers wanted
  47. Parallel Push Pull Drivers
  48. 6V6 in triode connect mode
  49. OPT winding orientation
  50. 6.3v Heater Regulator Schematic
  51. An Important Read
  52. Did a real nice find
  53. New guy with DIY ground ?s--yes, even after searching:D
  54. 5u4g vs 5u4gb
  55. Tube amp volume fluctuation
  56. Bad tube?
  57. 1626's watt?
  58. fellow Hawkeye lookin' for cadman!
  59. Shuagang 2A3C
  60. Parallel SE vs. Single SE Output Question
  61. PP OPT Core dimension
  62. Confirmation of Primary Impedance?
  63. What does a hole on the guide pin of an octal base represent?
  64. Sepp?
  65. 6AS7 lowpower amp?
  66. Dual Mono PSU with shared earth..
  67. Breadboard 6C33C-B S.E.T
  68. audionote schematic wanted !!
  69. DIY Extreme performance Output Transformers - AMSOL
  70. Dressing up Ampex 2012 tube amps
  71. About McIntosh C22 power transformer
  72. it is almost alive
  73. Ef86, 6H30PI and 2 EL34
  74. 7868 tubes in Bogen CHB100
  75. DIY Powdered Iron Tranny Core
  76. Which BG cap best suited for cathode bypass?
  77. Oscillation question- pre or power?
  78. changing (de)coupling cap values
  79. opamp driving tubes
  80. tube 833a
  81. My latest Project (nightmare)
  82. output transformer primary imp. calculation
  83. rogers cadet mk3 hummm.....
  84. Someone help: SE shematic with GK71?
  85. Calling Graham Ingle of black cat electronics
  86. Old Emerson Tube Radio... great find!
  87. Fender princeton/champ clone
  88. E810F in triode
  89. GZ37 replacement?
  90. Bias adjustment question
  91. 6W Self Inverting 6BQ5 Amp
  92. Inductance a problem with wirewound pots?
  93. Fun circuit with a 12ax7 (ecc83)
  94. want to do PP-GM70
  95. spraying the guts of my amp...
  96. How to drop 10v from mains for 300b amp.
  97. SE Output Primary Impedence
  98. Different input valves for KT88
  99. EL84/6BQ5 LUXMAN Amps
  100. Heresy? Replacing tube rectifier w/Weber Copper Cap
  101. Direct Coupled Choke-assisted Mu-stage
  102. Another 845 SE
  103. Is it possible - 6922 Active X-over running with ~ +/- 40V ?
  104. 12FQ8's ?
  105. my first tube site
  106. different measurements
  107. DIY Dyna MK 2's and using bottlehead C4S
  108. Elektor ECL86 RIAA Preamp
  109. ECC88 - upgrading from Teonex - Help ?
  110. B+ problem?
  111. Realistic SAF 24c - Need some help
  112. what is the cap
  113. EAR 509 Mkii manual
  114. Where do you draw the line between tube and sand?
  115. Shinrock transformers
  116. OT: Anybody having problems getting to AA ? nt
  117. how much above B+ will voltage swing in OPT?
  118. bias meter and pot lead length
  119. 211 biasing voltages preferances
  120. Definitely NOT a Loftin-White!!
  121. Val MP 211 info wanted
  122. Look for EL33 PP structure circuit
  123. Rodding Bogen CHB-10A Mono Blocks
  124. two value tube amps for active DIY horns
  125. GEC 912+
  126. soon available as wrist watch.....
  127. Low sensitivity speakers and valvs, no nfb?
  128. Has anyone built this amp?
  129. Difference bewteen ultralinear & triode mode?
  130. 7586 nuvistor
  131. Valve Identification-Help
  132. KT 88 schematic search
  133. Bias the new power tube
  134. 6M6G Structure of the circuit
  135. I Think I Saw Heaven !
  136. Tron Syren
  137. extremely low output
  138. project suggestion with spare trans
  139. cinema amps
  140. c3g producing sparks
  141. Where to get transformer parts?
  142. penta labs
  143. Dynaco ST70 clone
  144. anyone tried the diy paradise simple el84 pp
  145. compression?
  146. 100V trannies as valve OPT
  147. 6bm8 / Ecl82 Pse & Srpp
  148. Lowther LL26 restoration
  149. Can I trust my Valve Tester
  150. (RCA) 6SN7 GTC spec?
  151. re: need help on Counterpoint SA5.1 preamp
  152. Why no CCS in PP output stage?
  153. 811-A amp
  154. DYNACO 120W AMP for DYNA A-451
  155. 35watts el34 amp schematic search ?
  156. tube
  157. My first design. PSE 211 to review.
  158. new 832 tubes?
  159. How to test a tube
  160. 50V line trafos for tube O/P?
  161. Distortion analysis mu follower
  162. the general radio experimenter
  163. resistor value, please
  164. PL519 PP design
  165. Dealers for output irons in EU wanted
  166. Any Twin Power triode Noval type?
  167. ARC SP9 Preamp voltages
  168. Power transformer
  169. OTL for Raven R2
  170. passive preamp (autoformer)
  171. How fragile are Sylvania 10Y tubes?
  172. SE 6SN7/813 direct coupling
  173. Riken Ohm Vs Kiwame
  174. Advantage of Valve Preamp?
  175. SiC Schottky rectifiers.
  176. 30 W from 6c33b?
  177. Built-in bleeder in ASC?
  178. 833 and GU-48
  179. Safety with high volts: 101
  180. Kofi Annan in: "B+... PLUS!!!"
  181. searching for darling tubes.
  182. Audio Research LS8 scheme
  183. My new pp KT88 design
  184. Tubepreamp and Zappulse?
  185. Comments on Transcendent Sound products
  186. regaring 833se
  187. Asc Oil Capacitors
  188. Buy Tubes
  189. Placement of power amp imput resistor
  190. Brimar EL34
  191. Elekit TU-870
  192. Tube amplifier mods
  193. Stromberg-Carlson project
  194. How to design the straight load line for choke loaded tube ?
  195. OPT failure modes
  196. Life of tubes - what to expect?
  197. Profiteering from Gordan Rankin Designs
  198. Gain/Schematic Question
  199. Heath Distortion Measurement Set HD-1
  200. Tube troubleshooting question
  201. Speaker tube amp with headphones
  202. Gain of 6AK5
  203. R vs. RC on secondaries
  204. My simple 5010 amplifiers
  205. constant current sources...
  206. Critical resistors
  207. Digital tube designs?
  208. 2A3 SE Amp
  209. Dact closeout
  210. Mysterious runaway output tube
  211. Ampex 351 Power Transformer
  212. better the Pass camp?
  213. My first tube amp kit.
  214. Plate Resistor
  215. EZ81 tube rectifier
  216. 4K:10K interstage
  217. DIY in New York City
  218. can I tone control the Peavey Classic 60/60
  219. dead project, new life?
  220. Guitar overdriven preamp schematics?
  221. Interesting Read On 300B's
  222. Low voltage tubes
  223. Perser SA20 Restoration
  224. IP headroom with LTP splitter
  225. Triode strapping 6l6gc PP
  226. Question on design
  227. Peavey Classic 60/60 bias mod advice
  228. pin outs on Hammond tube amp?
  229. cathode follower
  230. Positive feedback online issue #16
  231. el84 help
  232. RIAA help
  233. Advise for my first tube amplifier, please
  234. My 50/10Y amp with hybrid PSU... am I doing the standby switch right?
  235. What can I build with this iron?
  236. Hey Planet_10 (and others)
  237. Tube sockets for Harmon-K Citation II
  238. Seeking a source for Mundorf M-caps.
  239. Question on ZZ-1000/8228
  240. noise analysis
  241. Using latching signal relay in SE guitar amp.
  242. Help wanted with fixing french DRG valve preamp....
  243. How hot are they supposed to get?
  244. EF86 Triode Mode
  245. Using a 6SL7 in a tube overdrive pedal instead of 12AX7?
  246. Guitar Amp Question!!!!! Adding Film Cap?
  247. naive questions
  248. Rozenblits Grounded grid preamp layout
  249. Help extend the life of my 805's
  250. Difference between 5687, 5687WA and 5687WB tubes?

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