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

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