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  1. Screen current through cathode resistors
  2. Gyrator design
  3. Any tips for routing heaters on a PCB
  4. 6EZ5 as drop in replacement for 6V6 tube?
  5. RIAA Preamp and equalization 12AX7
  6. Correct hum mods?
  7. Push-Pull from Stereo SE amp
  8. how to select transformers.
  9. Ultrapath or parallel feed apps. for 7591 amps?
  10. PP-UL amp with KT88
  11. Reuse these sockets and tube choice question
  12. Need help understanding this circuit
  13. Need a little help with a power supply I designed.
  14. Which tube Rectifier is good enough for 5902 tube amp ?
  15. Schematic for Masco ME-8?
  16. Transformer Rattle & Hum issue - Dynakit ST-70
  17. 6EZ8 (and other triple triodes) help please!
  18. Akron, Ohio
  19. 6N6P Heater and earth wiring advice
  20. united transformer corporation
  21. Capacitive v. Inductive inter-stage coupling
  22. unused secondaries on SE opt?
  23. Marco Rodint coil building info needed
  24. Scott 222B Hum
  25. how to make audio output transformer
  26. 5842 Anyone?
  27. 813 SE build
  28. Aikido LV improved psu
  29. My first HiFi project
  30. B&O 608 tube amplifier
  31. Just designed a 300b amplifier....
  32. Anyone used C3g to drive GM70?
  33. I need your help!!!!!
  34. 12au7 600 ohm output
  35. new C3g/211PSE comments pls
  36. Dynaco Mark IV Power Resistor
  37. Moondog with ac on gain & driver tubes?
  38. need help again on DIY Toccata MC Phono preamp
  39. Looking for analog Tube schematic for "analogmetric 1541a" DAC
  40. newbie needs help with tube inheritance
  41. 2A3 SETs with Edcor Iron
  42. What to do with this iron (originally from PP 7355)
  43. Just for everyone's amusement....
  44. beam tetrode calculations
  45. What are the differences between LC and CLC chokes
  46. gain and mid circuits
  47. Kay 503 Schematics?
  48. Transformer Data
  49. tube B 406 triode dick's cleo 4
  50. GE Snubber, High Current DC, and Switching Capacitors
  51. Russian EL84 - Many varieties
  52. Back From the Dead- A NOS Tube Story
  53. application for ccs/gyrator board from the groupbuy
  54. Building a tube radio
  55. Three more articles for the WW Archive
  56. Amplifier antics
  57. what about a tube makes it UL recommended
  58. 6as7 p-p with transformer phase-splitter
  59. Large power push pull output transformers, say 150W
  60. I need a schematic for a amp project
  61. Preamp resistors calculation for http://www.shine7.com
  62. Best replacement solid state rectifiers for a 400V 125 mA supply in a tube amp
  63. Dynakit PAS-2 Filament Voltage Question - replaced Selenium rectifier
  64. Vintage tubes
  65. Amp PSU standby and PA switching
  66. 245 tubes
  67. Vacuum tube clock radio
  68. First Project, need some help
  69. Graetz Scerzo Schematic
  70. 5bc3 rectifier
  71. Help me improve this PSU. (6c33 set, voltage doubler)
  72. Choke Loaded Driver Load Lines Question
  73. CCS and tube aging
  74. Tetra lives!!!!!
  75. Tube shops/supplies in Brisbane/Gold Coast
  76. AC VT25 filament?
  77. Let's show go on: Building Monster SE!
  78. Mystery 6AQ5A powered chassis?
  79. 6Y6G tube for low-voltage SE amplifier?
  80. Jolida gain and negative feedback?
  81. 1/2 of the tube for each channel?
  82. Problem with Legacy pentode driver stage
  83. 845 Operating Point
  84. Tube rectifiers
  85. D76 Inrush current limiter thermistor?
  86. New to Tubes? How to get the basics, read on..
  87. interstage tansformer impedence
  88. 2 PSU sharing the same Power transformer?
  89. Biasing amp
  90. CCS placement
  91. clueless on console
  92. Popping in stepped volume control
  93. 6by5 CRC Values
  94. Is this do-able?
  95. PCB for Gary Pimm's CCS & SS Pentode
  96. EL86 Single Ended PP Power Amplifier
  97. Diyhifisupply Billies - dead OPTs?
  98. 6H30P-DR
  99. Tube AMP and stax headphones....
  100. soft start power supply for dynaco st-70
  101. The Telefunken EF86?
  102. Can you run parallel circuits from a rectifier?
  103. Mullard 5-20 with 6L6GC's?
  104. Adding balanced input to 6N1P tube.
  105. Partial feedback (anode grid) with cathode follower
  106. 4P1L as First gain stage or in Pre-Amp..?
  107. Advice on 6418 design requested
  108. Tube lineup in an Admiral y4302
  109. John Broskie MIA?
  110. Audio Research VT 100 MKII need help!!
  111. Help with AD30 PSU build
  112. Who was the Japanese Amp Guru?
  113. 6922 vs an ECC82.....a test.
  114. Triode connected 6LW6 for SE
  115. 12AD7???
  116. New Book Review
  117. Hoax or truth about 6SJ7 (Equiv.: 6J8P/5693/CV3699/VT-116A).. ???
  118. looking for hi volt commercial power supplies
  119. 6L6, 6L6GT, 6L6GC, 5881, 7027, KT66...
  120. ECC85
  121. Pioneer 304B fm/am reciever schematic
  122. ECC82 JJ Made in Slovak Republic!?
  123. Definition of matched
  124. pick tubes for tubecad unbalancer
  125. OPT for EL34
  126. 12v dc tube amp/pre high SQ
  127. Better than 12au7?
  128. Amps and 4-ohm loads
  129. 814 as Triode / Max. Ug2 voltage
  130. musical fidelity x10d clone
  131. Acrosound 7591A amp
  132. suggestions for simple amp wanted
  133. Wish you could nail down your copper wool holder?
  134. HELP- Pricing Genuine Genalex KT77's
  135. K120 on 6550/KT88/KT90 anyone tried???
  136. do tubes ever leak b+ into heaters?
  137. How can I use these high-current, low-inductance chokes?
  138. 6005w Q+introduction
  139. Sonic Frontiers Line 3 Increate the Output Voltage
  140. Dynaco ST-70 chassis
  141. Opinion on the scheme with the 12AX7!
  142. Fully Parametric Tube EQ (with gyrators)
  143. anyone knows of 6 channel tube amplier ?
  144. 6N6P SE idea
  145. EL84
  146. Long tails and current sources
  147. How to reduce gain in mu-follower?
  148. Single Ended Amplifier 6P43P
  149. 6C33C spacing
  150. A very excitable Luminescence
  151. KT-88 Data sheet question.
  152. Good 12ax7
  153. Operating points theory...
  154. What should clipping look like? (AKA reading sine waves)
  155. Quicksilver Mono Amp Model 1300 - creating Auto Bias wanted
  156. 845 with kathode bias
  157. Looking for EI-75 80% perm ...
  158. Ambient temperature target
  159. Old radio
  160. JJ glowing twice as bright
  161. DPA150
  162. Discharging a capacitor - should I??
  163. German transformer builder
  164. 6P30B-V subminiature tube
  165. Improved Tube Headphones Amp
  166. Best method of reducing line voltage into vintage transformers?
  167. Harman-Kardon TA5000X, A500 or A50K OPT - Quality?
  168. hum measurement
  169. DIY 450VA+ multi-tapped tube power trafo
  170. DIY 450VA+ multi-tapped tube power trafo
  171. Duelund Alexander Copper Foil Capacitors
  172. Yaqin MS-20L tube recommendation
  173. Tube version of aleph-x. Is it possible?
  174. help - Looking for specs Trimax TA1439
  175. Mono 5W-17W Power Amp using EL84 push-pull
  176. Reference Books
  177. Tresco?
  178. BELL 3DT, Phono RIAA Odditty
  179. 6SL7/6V6 tubes in an RH84 SE amplifier?
  180. How to calculate max voltage swing in cathode follower?
  181. Silvaweld OTL Tube Reference 100 schematics
  182. Unison Research SMART 845
  183. 26/45 SE amp ?
  184. Sweep Tube SEP
  185. Help me find cirquit, I forgot where I last saw it?
  186. Plate resistor for FVP5a
  187. DHT w/ DC heater - How to rig cathode bias?
  188. schematics needed- Luxman MQ70
  189. CSS for 6c33?
  190. Svetlana (Winged C) 6L6GC vs. the Others...
  191. Power Supply Help- 807's, High Voltage
  192. Looking for info about a 1940s Amp
  193. More amplifiers in the Wireless World Archive
  194. why does my amp require a preamp?
  195. Why two GZ34 in this schematic?
  196. Floating Dc heaters, capacitor to ground
  197. anyone have experience with 1J17B tube
  198. Preventing arcing on standby switch?
  199. Help with buzzing mains transformer
  200. Balanced Amp Topology
  201. ECC33
  202. Distortion spectrum vs feedback
  203. Heaters question
  204. what's my fisher 400 off gassing?
  205. Executone schematic needed
  206. parafeed output amplifier
  207. CCCP SUBTUBE: my last project
  208. Aikido Line-Stage jumper question
  209. Tube Amplifier to power Gale GS401 speakers
  210. Bypass Cap on cathode?
  211. How to measure/calculate dB of negative feedback?
  212. Need your advices & experiences
  213. Parmeko gresham transformers specifications
  214. Valve cascodes for Phono input.
  215. ST-70 XLR Balanced Driver Boad
  216. I'm new here any places for like us newbies?
  217. Noob looking for some advice
  218. QQE04/5 Curves
  219. Help on Audio Research D79A adjustment
  220. lazarus preamp hums even with volume down and no components connected.
  221. Troubles when elevating a LT supply
  222. Turning up the heat: cathode bias
  223. Anyone build Dynaco Mk IIIs with Sullivan boards?
  224. Lowering gain on Frank's 6SN7 preamp
  225. Pro amp input modification
  226. Sanity of compactron for "integrated" headphone amp?
  227. HELP - SMART 845 or 300B SE
  228. DC Servo - Direct Coupling Applications?
  229. Edison 12 amplifier
  230. 6C33C tube socket for GM70 tube??
  231. Fisher X100C 2 sets speakers?
  232. 4P1L DHT Line Stage
  233. Trying to identify an old radio tube
  234. Yaqin CD3 upgrading caps help for novice
  235. push pull adjustable fixed bias
  236. Another SE amp design.
  237. Ray Butts Echosonic #27
  238. What coupling capacitor values are common
  239. Yamamoto A-09s
  240. 9001 variant of Acorn 954 Pentode
  241. Grounding the 4ohm tap
  242. Rectifier mechanical buzz
  243. Informed opinion(s) on phase inversion?
  244. Strange problem with Grundig CS200 tube receiver
  245. Puresound P10 RIAA
  246. Need help on DIY Toccata Phono Preamp
  247. Single 6EB8 tube kit?
  248. SE OPT as PS choke
  249. Best input DHT tube?
  250. Hm, which order to replace 2 out of 4 tubes?

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