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  1. some misc schematics, manley, rotel
  2. What happened to my tube??
  3. Tube Preamp Question
  4. Schematic for Pilot SP215
  5. Screen current through cathode resistors
  6. Gyrator design
  7. Any tips for routing heaters on a PCB
  8. 6EZ5 as drop in replacement for 6V6 tube?
  9. RIAA Preamp and equalization 12AX7
  10. Correct hum mods?
  11. Push-Pull from Stereo SE amp
  12. how to select transformers.
  13. Ultrapath or parallel feed apps. for 7591 amps?
  14. PP-UL amp with KT88
  15. Reuse these sockets and tube choice question
  16. Need help understanding this circuit
  17. Need a little help with a power supply I designed.
  18. Which tube Rectifier is good enough for 5902 tube amp ?
  19. Schematic for Masco ME-8?
  20. Transformer Rattle & Hum issue - Dynakit ST-70
  21. pio coupling caps - damaged/used?
  22. 6EZ8 (and other triple triodes) help please!
  23. Akron, Ohio
  24. 6N6P Heater and earth wiring advice
  25. united transformer corporation
  26. Capacitive v. Inductive inter-stage coupling
  27. unused secondaries on SE opt?
  28. Marco Rodint coil building info needed
  29. Scott 222B Hum
  30. how to make audio output transformer
  31. 5842 Anyone?
  32. 813 SE build
  33. Aikido LV improved psu
  34. My first HiFi project
  35. B&O 608 tube amplifier
  36. Just designed a 300b amplifier....
  37. Anyone used C3g to drive GM70?
  38. Capacitors found, have you used these?
  39. I need your help!!!!!
  40. 12au7 600 ohm output
  41. new C3g/211PSE comments pls
  42. anyone know of a source for 12 pin+ connectors?
  43. Dynaco Mark IV Power Resistor
  44. Moondog with ac on gain & driver tubes?
  45. need help again on DIY Toccata MC Phono preamp
  46. Looking for analog Tube schematic for "analogmetric 1541a" DAC
  47. newbie needs help with tube inheritance
  48. 2A3 SETs with Edcor Iron
  49. What to do with this iron (originally from PP 7355)
  50. Just for everyone's amusement....
  51. beam tetrode calculations
  52. What are the differences between LC and CLC chokes
  53. gain and mid circuits
  54. Kay 503 Schematics?
  55. Transformer Data
  56. tube B 406 triode dick's cleo 4
  57. GE Snubber, High Current DC, and Switching Capacitors
  58. Russian EL84 - Many varieties
  59. Back From the Dead- A NOS Tube Story
  60. application for ccs/gyrator board from the groupbuy
  61. Building a tube radio
  62. Three more articles for the WW Archive
  63. Amplifier antics
  64. what about a tube makes it UL recommended
  65. 6as7 p-p with transformer phase-splitter
  66. Large power push pull output transformers, say 150W
  67. I need a schematic for a amp project
  68. Preamp resistors calculation for http://www.shine7.com
  69. Best replacement solid state rectifiers for a 400V 125 mA supply in a tube amp
  70. Dynakit PAS-2 Filament Voltage Question - replaced Selenium rectifier
  71. Vintage tubes
  72. Amp PSU standby and PA switching
  73. 245 tubes
  74. Vacuum tube clock radio
  75. First Project, need some help
  76. Graetz Scerzo Schematic
  77. simple se 2a3 amp help!!!!!
  78. 5bc3 rectifier
  79. Help me improve this PSU. (6c33 set, voltage doubler)
  80. Choke Loaded Driver Load Lines Question
  81. CCS and tube aging
  82. Tetra lives!!!!!
  83. Tube shops/supplies in Brisbane/Gold Coast
  84. AC VT25 filament?
  85. Let's show go on: Building Monster SE!
  86. Mystery 6AQ5A powered chassis?
  87. 6Y6G tube for low-voltage SE amplifier?
  88. Jolida gain and negative feedback?
  89. 1/2 of the tube for each channel?
  90. Problem with Legacy pentode driver stage
  91. 845 Operating Point
  92. Tube rectifiers
  93. D76 Inrush current limiter thermistor?
  94. New to Tubes? How to get the basics, read on..
  95. interstage tansformer impedence
  96. 2 PSU sharing the same Power transformer?
  97. Biasing amp
  98. CCS placement
  99. clueless on console
  100. 5E3 Build Problems Cont'd
  101. Popping in stepped volume control
  102. 6by5 CRC Values
  103. Is this do-able?
  104. PCB for Gary Pimm's CCS & SS Pentode
  105. EL86 Single Ended PP Power Amplifier
  106. Diyhifisupply Billies - dead OPTs?
  107. 6H30P-DR
  108. Tube AMP and stax headphones....
  109. soft start power supply for dynaco st-70
  110. The Telefunken EF86?
  111. Can you run parallel circuits from a rectifier?
  112. Mullard 5-20 with 6L6GC's?
  113. Adding balanced input to 6N1P tube.
  114. Partial feedback (anode grid) with cathode follower
  115. 4P1L as First gain stage or in Pre-Amp..?
  116. Advice on 6418 design requested
  117. Shorting jumpers for octal sockets
  118. Tube lineup in an Admiral y4302
  119. John Broskie MIA?
  120. Audio Research VT 100 MKII need help!!
  121. Help with AD30 PSU build
  122. Who was the Japanese Amp Guru?
  123. 6922 vs an ECC82.....a test.
  124. Triode connected 6LW6 for SE
  125. 12AD7???
  126. New Book Review
  127. Hoax or truth about 6SJ7 (Equiv.: 6J8P/5693/CV3699/VT-116A).. ???
  128. looking for hi volt commercial power supplies
  129. 6L6, 6L6GT, 6L6GC, 5881, 7027, KT66...
  130. ECC85
  131. Pioneer 304B fm/am reciever schematic
  132. ECC82 JJ Made in Slovak Republic!?
  133. Definition of matched
  134. Polycarbonate as coupling caps?
  135. pick tubes for tubecad unbalancer
  136. OPT for EL34
  137. 12v dc tube amp/pre high SQ
  138. Better than 12au7?
  139. Amps and 4-ohm loads
  140. What is the "best" tube amp / speaker / source you have ever used?
  141. 814 as Triode / Max. Ug2 voltage
  142. valves better than solid state?
  143. musical fidelity x10d clone
  144. Acrosound 7591A amp
  145. suggestions for simple amp wanted
  146. Wish you could nail down your copper wool holder?
  147. HELP- Pricing Genuine Genalex KT77's
  148. K120 on 6550/KT88/KT90 anyone tried???
  149. do tubes ever leak b+ into heaters?
  150. How can I use these high-current, low-inductance chokes?
  151. 6005w Q+introduction
  152. Sonic Frontiers Line 3 Increate the Output Voltage
  153. Dynaco ST-70 chassis
  154. Opinion on the scheme with the 12AX7!
  155. Fully Parametric Tube EQ (with gyrators)
  156. 600v snap-in electrolytics
  157. anyone knows of 6 channel tube amplier ?
  158. 6N6P SE idea
  159. EL84
  160. Long tails and current sources
  161. How to reduce gain in mu-follower?
  162. Chassis
  163. Single Ended Amplifier 6P43P
  164. 6C33C spacing
  165. A very excitable Luminescence
  166. KT-88 Data sheet question.
  167. Good 12ax7
  168. Operating points theory...
  169. 1-stage (killer, literally) amp made of junk
  170. Two bridges and a CT transformer....
  171. What should clipping look like? (AKA reading sine waves)
  172. Combining coupling cap's
  173. Quicksilver Mono Amp Model 1300 - creating Auto Bias wanted
  174. 845 with kathode bias
  175. Mixing Resistor types?
  176. Looking for EI-75 80% perm ...
  177. Ambient temperature target
  178. Old radio
  179. JJ glowing twice as bright
  180. DPA150
  181. Discharging a capacitor - should I??
  182. German transformer builder
  183. 6P30B-V subminiature tube
  184. Improved Tube Headphones Amp
  185. Best method of reducing line voltage into vintage transformers?
  186. Harman-Kardon TA5000X, A500 or A50K OPT - Quality?
  187. hum measurement
  188. DIY 450VA+ multi-tapped tube power trafo
  189. DIY 450VA+ multi-tapped tube power trafo
  190. Duelund Alexander Copper Foil Capacitors
  191. Yaqin MS-20L tube recommendation
  192. Tube version of aleph-x. Is it possible?
  193. help - Looking for specs Trimax TA1439
  194. where can i get transformers in the UK?
  195. Mono 5W-17W Power Amp using EL84 push-pull
  196. Reference Books
  197. Tresco?
  198. BELL 3DT, Phono RIAA Odditty
  199. 6SL7/6V6 tubes in an RH84 SE amplifier?
  200. How to calculate max voltage swing in cathode follower?
  201. Power Transformer Temp
  202. Silvaweld OTL Tube Reference 100 schematics
  203. Need suggestion for 6.3V-0-6.3V
  204. Unison Research SMART 845
  205. 26/45 SE amp ?
  206. V2 rocket guidance system.
  207. Sweep Tube SEP
  208. Help me find cirquit, I forgot where I last saw it?
  209. Passive or Active? For Wet/Dry mix on valve driven reverb.
  210. Plate resistor for FVP5a
  211. Simulation
  212. DHT w/ DC heater - How to rig cathode bias?
  213. schematics needed- Luxman MQ70
  214. CSS for 6c33?
  215. Svetlana (Winged C) 6L6GC vs. the Others...
  216. Power Supply Help- 807's, High Voltage
  217. Looking for info about a 1940s Amp
  218. More amplifiers in the Wireless World Archive
  219. why does my amp require a preamp?
  220. Why two GZ34 in this schematic?
  221. Floating Dc heaters, capacitor to ground
  222. anyone have experience with 1J17B tube
  223. Preventing arcing on standby switch?
  224. Help with buzzing mains transformer
  225. Balanced Amp Topology
  226. ECC33
  227. Distortion spectrum vs feedback
  228. Heaters question
  229. Why do transformers have such*&%#* hardware?
  230. what's my fisher 400 off gassing?
  231. Executone schematic needed
  232. parafeed output amplifier
  233. B+K 500 Testor Question
  234. CCCP SUBTUBE: my last project
  235. Aikido Line-Stage jumper question
  236. Tube Amplifier to power Gale GS401 speakers
  237. Bypass Cap on cathode?
  238. How to measure/calculate dB of negative feedback?
  239. Need your advices & experiences
  240. Parmeko gresham transformers specifications
  241. Valve cascodes for Phono input.
  242. ST-70 XLR Balanced Driver Boad
  243. I'm new here any places for like us newbies?
  244. Noob looking for some advice
  245. Stand Alone guitar power amp for evaluation
  246. QQE04/5 Curves
  247. Help on Audio Research D79A adjustment
  248. lazarus preamp hums even with volume down and no components connected.
  249. Troubles when elevating a LT supply
  250. Turning up the heat: cathode bias

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