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  1. Please need help! TUBE BIAS PROBE
  2. Aikido Phono Stage
  3. Using an El84 as a driver
  4. Transfromer value of this 300B circuit
  5. Chassis Layout & PS questions
  6. help needed for 1st DIY tube amp - Sakuma 845 SE
  7. Ideas for 4v filament triodes/pentodes
  8. Comments on Power Amp Viability
  9. Balanced active crossover advice
  10. The Tube Center
  11. Help1 with a 3 channel 2a3 amplifier
  12. volume control hum/noise
  13. PS choke magnetic induction
  14. Circlotron power supply question
  15. Autoformer as choke?
  16. E182CC
  17. Fender Hotrod Deville 212
  18. Grundig Fine Arts OTL Amplifier
  19. Damper diodes, 6ax4 and or 6w4?
  20. Knight 333 / Pioneer SX 34B info needed.
  21. Gargantuan Linestage Output Capacitors
  22. Quad II Restoration
  23. Help identifying a tube.
  24. Tube filaments in series?
  25. Design of Resonant Input Choke PSU
  26. Dissimilar triode
  27. How important is the quality of a triode used as a cathode follower
  28. EL34B tubes
  29. Why not so common to split dual triodes between channels?
  30. In search of power supply schematic for phono preamp
  31. General Electric vs Toshiba 6L6's
  32. Audio Research Dual 75 Capacitor Source?
  33. Choosing A Cathode bypass capacitor
  34. 12AU7 SRPP buffer suggestions
  35. Pentode/triode switch question
  36. Lundahll 1669A Secondary voltage???
  37. Substituting tube rectifiers by silicon
  38. newbie question: is the connection to the output xformer somewhat odd?
  39. All quiet on the SN front - about darned time!
  40. Estimating power output
  41. Looking for KT88 Amplifier Schematic by Mikael Abdellah
  42. Comments on passive pre and cables
  43. curvecaptor
  44. 6b4g pushpull build!newbie
  45. Need help; I have "dog leg" shaped waveform on my amp
  46. Output Transformer Question?
  47. Urgent OT HELP needed ASAP please
  48. Questions on Triode Strapping
  49. Morgan Jones BALANCED?
  50. What are your RFI precautions?
  51. Pentodes without cathodes?
  52. help me
  53. Good quality 6600 CT OT
  54. Local Hamfest score!!!
  55. Unknown Transformer
  56. S5 11g help
  57. 6SN7 pre-amp
  58. These tube can be use for amplifier
  59. Any pitfalls to choke derived CT?
  60. Audio Research D76A bias adjustment
  61. I meet Mr. Morgan Jones
  62. st70 electrolytic caps
  63. Thank you SY
  64. el84 1 channel stopped working help
  65. Help! Weak Bass!
  66. never say never - 300B amps...
  67. 6aq5 Screen resistor?
  68. L. Tatro farm radios from 1930's.
  69. Published/DIY ultra-low THD designs?
  70. EL84 SE auto bias
  71. Kofi Annan in: "Oscillatin' in the Bevois Valley'"
  72. Subwoofer connections
  73. 6/30L2 - What to do with them ?
  74. PIONEER SA-810 Tube Amp Schematics
  75. EF86 Gm
  76. EL84/6BQ5 Ultra-Linear Push-Pull Recomendation
  77. Aria 6P14 makeover.
  78. switch for paralelled tube
  79. Curvecaptor with pentodes??
  80. Ground point for HF decoupling cap?
  81. Cancelling Harmonics
  82. Quiet Tube
  83. LM385 Adjustable voltage ref. diode as LED bias?
  84. Tubed Expression Pedal
  85. Any spice models around for AA5-esque battery tubes?
  86. Where to connect shielding
  87. Bogen K15 convert to guitar amp
  88. Help 805 As that the friend makes to straighten even gallbladder machine
  89. studiogear of the beatles
  90. 6AK5 Triode Curves
  91. twisted pair signal, source selector and ground buss???
  92. Tiny Amplifiers
  93. A newly aquired Hum
  94. many jan tubes
  95. is this the correct way of adding a volume control?
  96. Basic DIY Valve Phono Stage
  97. 5879 Experience?
  98. personal jobs
  99. Wanted Triode strapped curves for pentode of ECL82.
  100. source selector / volume hum in Aikido
  101. DHTs and Cathode Bias
  102. Best SET driver stage with lots of B+?
  103. Tube Library Pspice error
  104. referencing DC heater to B+
  105. Double floating Circlotron
  106. Supply Capacitors ?
  107. Sakuma style Tango project
  108. MC10L is good or not
  109. Eico HF-20 & Claus Byrith PS voltage & power draw
  110. Voltage Regulator Tubes
  111. EL34 triode-connected grounding-grid curves?
  112. Pls help me understand AR SP6 circuit
  113. good begginer project (ax84 v.s. boozhound)
  114. I'm looking for 417a/5842 Preamp Schematic without any Transformer, any suggestion ?
  115. Trouble in a new DIY amp.
  116. Suitable Transformers
  117. PT winding calculations HELP
  118. How to measure frequency response with a PC?
  119. Pspice Tube Generation Software
  120. Tektron tube amplifier Italy made
  121. What to do with 2x Stancor A3830?
  122. REQ: Schematics and tweaking tips
  123. Jadis Da 60 & 80
  124. 6L6 for a beginner, plus ECL86/6GW8
  125. Leak Stereo 20 clone? possibly with 6V6?
  126. Any comment on Vacuum State dpa300b??
  127. Radiotron Designers Handbook
  128. Kofi Annan in: "Buggin' the 'S' Outta Me!"
  129. 12B4 eqivalent : sonics-wise ?
  130. Any Eimac Scematics?
  131. What's a 6SL7 Good For?
  132. Where Can Buy 6c41
  133. would twisted pair from a network cable be suitable as hook-up wires inside an amp?
  134. use a 45 to drive a 45 ?
  135. Regulated heater reference
  136. Heater Elevation, how high?
  137. 6201 alternative
  138. 4V Tentlabs filament supply
  139. Difference between stereo & 2 monoblocks
  140. Parallel operation of triodes.
  141. input tubes using 6922?
  142. Looking for choices - affordable PP OPTs
  143. removing HF damping pF caps for guitar
  144. HH Scott Transformer #s
  145. Tips for rebuilding this amp?
  146. Need advice - what can I build with this power transformer?
  147. Source for high voltage electro caps
  148. differences between K-12M and K-12G kits?
  149. 12B4 Line Stage with Fixed Bias?
  150. split push-pull output stage
  151. any thoughts/explanation on the power supply for this circuit?
  152. Where to begin on a PP?
  153. ProAc Tablette 50 Speakers
  154. Recognizing wiped out ECC's 81,82,83
  155. So tell me.... how did YOU get into tubes??
  156. 7189 or 7819 el84 tube?
  157. Question about Star Grounding
  158. Employment offered; breadboarding a Tube Monoblock
  159. Need help: Looking for ECF80 preamp schematic
  160. a 5AR4 after a diode bridge? what is the purpose?
  161. 807 & Pe 06/40n
  162. Board layout design
  163. 12AX7, 12AU7 Substitution
  164. 200,000 Tubes for sale in Michigan
  165. Ground scheme
  166. Help on 6L6GC Triode PP..working points..
  167. A neat trick?
  168. Setup & Implementation of G Pimm's Self-Bias CCS
  169. Tube Preamp FM interference
  170. Parafeed 6EM7 with 2k load?
  171. Need Help on HEATHKIT W-5M Power Transformer
  172. Fully isolated oilbath transformer.
  173. small signal DHT or DHP like AVVT20/8?
  174. EL 84 Pentode Config.
  175. Amp Tubes
  176. Can I replace the 1M volume pot with a 100K one in my HK A300?
  177. what's a hum band?
  178. Tube phono pre-amp needed.
  179. U/L or triode mode on music angel amp
  180. Why do some people dislike ultralinear?
  181. Adaptive class A
  182. 6X4 Tube rectifier.
  183. AN Conquest Clone modification
  184. Beautiful tubes.
  185. Selectable EL34/6L6 Amp OT
  186. Simple circlotron amp
  187. 12AX7 how many is enough?
  188. samples of 300B in pse or pp
  189. power supply choke with a connection for AC ground?
  190. Heathkit A7E for guitar - preamp gain
  191. musical fidelity x10d schematic
  192. Pot Value
  193. Eico 666 (satan's choice) tube tester help.
  194. Finally built a subminiature guitar amp... now I need help!
  195. Minor crackling in new valves
  196. Matchless Lightning v Spitfire
  197. Aikido linestage Help Needed
  198. Scott 299A Schematic
  199. Q on PP & current mirrors
  200. Calculating PT headroom in PP class AB
  201. EL34 Failure
  202. Aikido Transformer recommendation
  203. No mains transformer B+ ?
  204. Help with horizontal mounting of 01-A and VR tubes
  205. twisted pair wiring on a tube amp
  206. Calculating SE Output Question
  207. Fixed-Bias Williamson EL34
  208. Bogen CHB-35 Preamp Mod
  209. resistors and sonic effects?
  210. tamura F-683 pole question
  211. EC52--Plate choke--300B/45/2a3/50/EL34 SE
  212. vtl deluxe 300 mb
  213. Is SD a Schottky Diode in this schematic?
  214. Maida regulator
  215. 572B vs 845 vs 211 SE
  216. Yet Another EL84 Amp
  217. Regulator for tube pre
  218. referencing heater supply ground to B+
  219. One Question for Hammond 1620 output transformer
  220. Bias adjustment on Dynaco ST70
  221. To SRPP or not?
  222. Ampeg SVT-VR or SVT-CL Schematics
  223. 811 vs 811A?
  224. Bogen integrated stereo amp
  225. Audionote japan ( Kondo) Ongaku..Can I ......... Clone to DIY!!!!!!!
  226. Broken 6L6WXT tube
  227. transformer questions
  228. Microphone With A Low Impedance Tube
  229. 6EM7 Push-Pull
  230. polarity of Xicon electrolytics
  231. SE EL84 question
  232. Slightly Different guitar amp question
  233. ST-70 Power Transformer Info
  234. My new quad SED EL34 arrived
  235. isolation transformer for 50C5 amp
  236. DSP and vacuum tubes (from Analog Devices)
  237. Asymmetrical P-P OPT Primary
  238. Gated beam discriminator "amplifier"
  239. PCB Mount Loctal Socket?
  240. "Zero bias"/ driving the grid positive
  241. Low Profile Power Transformer Help
  242. Lowering Gain on an Aikido Preamp
  243. HELP; DIY PP amp - it's phase splitter, or buy Chineese.
  244. Tube vs. SS CCS...
  245. Another "I need an amp recommendation" thread
  246. i am a new one here
  247. i am new ! can you help me
  248. Pentode CCS: Would somebody check my work?
  249. PSU for 12V DC heaters
  250. 50C5 Triode strapped?

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