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  1. Circlotron power supply question
  2. Autoformer as choke?
  3. E182CC
  4. Grundig Fine Arts OTL Amplifier
  5. Damper diodes, 6ax4 and or 6w4?
  6. Knight 333 / Pioneer SX 34B info needed.
  7. Gargantuan Linestage Output Capacitors
  8. Quad II Restoration
  9. Help identifying a tube.
  10. Tube filaments in series?
  11. Design of Resonant Input Choke PSU
  12. Dissimilar triode
  13. How important is the quality of a triode used as a cathode follower
  14. EL34B tubes
  15. Why not so common to split dual triodes between channels?
  16. In search of power supply schematic for phono preamp
  17. General Electric vs Toshiba 6L6's
  18. Audio Research Dual 75 Capacitor Source?
  19. Choosing A Cathode bypass capacitor
  20. 12AU7 SRPP buffer suggestions
  21. Pentode/triode switch question
  22. Lundahll 1669A Secondary voltage???
  23. Substituting tube rectifiers by silicon
  24. newbie question: is the connection to the output xformer somewhat odd?
  25. All quiet on the SN front - about darned time!
  26. Estimating power output
  27. Looking for KT88 Amplifier Schematic by Mikael Abdellah
  28. Comments on passive pre and cables
  29. curvecaptor
  30. 6b4g pushpull build!newbie
  31. Need help; I have "dog leg" shaped waveform on my amp
  32. Output Transformer Question?
  33. Urgent OT HELP needed ASAP please
  34. Questions on Triode Strapping
  35. Morgan Jones BALANCED?
  36. What are your RFI precautions?
  37. Pentodes without cathodes?
  38. help me
  39. Good quality 6600 CT OT
  40. Local Hamfest score!!!
  41. Unknown Transformer
  42. S5 11g help
  43. 6SN7 pre-amp
  44. These tube can be use for amplifier
  45. Any pitfalls to choke derived CT?
  46. Audio Research D76A bias adjustment
  47. I meet Mr. Morgan Jones
  48. st70 electrolytic caps
  49. Thank you SY
  50. el84 1 channel stopped working help
  51. Help! Weak Bass!
  52. never say never - 300B amps...
  53. 6aq5 Screen resistor?
  54. L. Tatro farm radios from 1930's.
  55. Published/DIY ultra-low THD designs?
  56. EL84 SE auto bias
  57. Kofi Annan in: "Oscillatin' in the Bevois Valley'"
  58. Subwoofer connections
  59. 6/30L2 - What to do with them ?
  60. PIONEER SA-810 Tube Amp Schematics
  61. EF86 Gm
  62. EL84/6BQ5 Ultra-Linear Push-Pull Recomendation
  63. Aria 6P14 makeover.
  64. switch for paralelled tube
  65. Curvecaptor with pentodes??
  66. Ground point for HF decoupling cap?
  67. Cancelling Harmonics
  68. Quiet Tube
  69. LM385 Adjustable voltage ref. diode as LED bias?
  70. Tubed Expression Pedal
  71. Any spice models around for AA5-esque battery tubes?
  72. Where to connect shielding
  73. Help 805 As that the friend makes to straighten even gallbladder machine
  74. studiogear of the beatles
  75. 6AK5 Triode Curves
  76. twisted pair signal, source selector and ground buss???
  77. Tiny Amplifiers
  78. A newly aquired Hum
  79. many jan tubes
  80. is this the correct way of adding a volume control?
  81. Basic DIY Valve Phono Stage
  82. 5879 Experience?
  83. personal jobs
  84. Wanted Triode strapped curves for pentode of ECL82.
  85. source selector / volume hum in Aikido
  86. DHTs and Cathode Bias
  87. Best SET driver stage with lots of B+?
  88. Tube Library Pspice error
  89. referencing DC heater to B+
  90. Double floating Circlotron
  91. Supply Capacitors ?
  92. Sakuma style Tango project
  93. MC10L is good or not
  94. Eico HF-20 & Claus Byrith PS voltage & power draw
  95. Voltage Regulator Tubes
  96. EL34 triode-connected grounding-grid curves?
  97. Pls help me understand AR SP6 circuit
  98. I'm looking for 417a/5842 Preamp Schematic without any Transformer, any suggestion ?
  99. Trouble in a new DIY amp.
  100. Suitable Transformers
  101. PT winding calculations HELP
  102. How to measure frequency response with a PC?
  103. Pspice Tube Generation Software
  104. Tektron tube amplifier Italy made
  105. What to do with 2x Stancor A3830?
  106. REQ: Schematics and tweaking tips
  107. Jadis Da 60 & 80
  108. 6L6 for a beginner, plus ECL86/6GW8
  109. Leak Stereo 20 clone? possibly with 6V6?
  110. Any comment on Vacuum State dpa300b??
  111. Radiotron Designers Handbook
  112. Kofi Annan in: "Buggin' the 'S' Outta Me!"
  113. 12B4 eqivalent : sonics-wise ?
  114. Any Eimac Scematics?
  115. What's a 6SL7 Good For?
  116. Where Can Buy 6c41
  117. would twisted pair from a network cable be suitable as hook-up wires inside an amp?
  118. use a 45 to drive a 45 ?
  119. Regulated heater reference
  120. Heater Elevation, how high?
  121. 6201 alternative
  122. 4V Tentlabs filament supply
  123. Difference between stereo & 2 monoblocks
  124. Parallel operation of triodes.
  125. input tubes using 6922?
  126. Looking for choices - affordable PP OPTs
  127. HH Scott Transformer #s
  128. Tips for rebuilding this amp?
  129. Need advice - what can I build with this power transformer?
  130. differences between K-12M and K-12G kits?
  131. 12B4 Line Stage with Fixed Bias?
  132. split push-pull output stage
  133. any thoughts/explanation on the power supply for this circuit?
  134. Where to begin on a PP?
  135. ProAc Tablette 50 Speakers
  136. Recognizing wiped out ECC's 81,82,83
  137. So tell me.... how did YOU get into tubes??
  138. 7189 or 7819 el84 tube?
  139. Question about Star Grounding
  140. Employment offered; breadboarding a Tube Monoblock
  141. Need help: Looking for ECF80 preamp schematic
  142. a 5AR4 after a diode bridge? what is the purpose?
  143. 807 & Pe 06/40n
  144. Board layout design
  145. 12AX7, 12AU7 Substitution
  146. 200,000 Tubes for sale in Michigan
  147. Ground scheme
  148. Help on 6L6GC Triode PP..working points..
  149. A neat trick?
  150. Setup & Implementation of G Pimm's Self-Bias CCS
  151. Tube Preamp FM interference
  152. Parafeed 6EM7 with 2k load?
  153. Need Help on HEATHKIT W-5M Power Transformer
  154. Fully isolated oilbath transformer.
  155. small signal DHT or DHP like AVVT20/8?
  156. EL 84 Pentode Config.
  157. Amp Tubes
  158. Can I replace the 1M volume pot with a 100K one in my HK A300?
  159. what's a hum band?
  160. Tube phono pre-amp needed.
  161. U/L or triode mode on music angel amp
  162. Why do some people dislike ultralinear?
  163. Adaptive class A
  164. 6X4 Tube rectifier.
  165. AN Conquest Clone modification
  166. Beautiful tubes.
  167. Selectable EL34/6L6 Amp OT
  168. Simple circlotron amp
  169. 12AX7 how many is enough?
  170. samples of 300B in pse or pp
  171. power supply choke with a connection for AC ground?
  172. musical fidelity x10d schematic
  173. Pot Value
  174. Minor crackling in new valves
  175. Aikido linestage Help Needed
  176. Scott 299A Schematic
  177. Q on PP & current mirrors
  178. Calculating PT headroom in PP class AB
  179. EL34 Failure
  180. Aikido Transformer recommendation
  181. No mains transformer B+ ?
  182. Help with horizontal mounting of 01-A and VR tubes
  183. twisted pair wiring on a tube amp
  184. Calculating SE Output Question
  185. Fixed-Bias Williamson EL34
  186. Bogen CHB-35 Preamp Mod
  187. resistors and sonic effects?
  188. tamura F-683 pole question
  189. EC52--Plate choke--300B/45/2a3/50/EL34 SE
  190. vtl deluxe 300 mb
  191. Is SD a Schottky Diode in this schematic?
  192. Maida regulator
  193. 572B vs 845 vs 211 SE
  194. Yet Another EL84 Amp
  195. Regulator for tube pre
  196. referencing heater supply ground to B+
  197. One Question for Hammond 1620 output transformer
  198. Bias adjustment on Dynaco ST70
  199. To SRPP or not?
  200. 811 vs 811A?
  201. Bogen integrated stereo amp
  202. Audionote Japan (Kondo) Ongaku... Can I Clone to DIY!
  203. Broken 6L6WXT tube
  204. transformer questions
  205. Microphone With A Low Impedance Tube
  206. 6EM7 Push-Pull
  207. polarity of Xicon electrolytics
  208. SE EL84 question
  209. ST-70 Power Transformer Info
  210. My new quad SED EL34 arrived
  211. isolation transformer for 50C5 amp
  212. DSP and vacuum tubes (from Analog Devices)
  213. Asymmetrical P-P OPT Primary
  214. Gated beam discriminator "amplifier"
  215. PCB Mount Loctal Socket?
  216. "Zero bias"/ driving the grid positive
  217. Low Profile Power Transformer Help
  218. Lowering Gain on an Aikido Preamp
  219. HELP; DIY PP amp - it's phase splitter, or buy Chineese.
  220. Tube vs. SS CCS...
  221. Another "I need an amp recommendation" thread
  222. i am a new one here
  223. i am new ! can you help me
  224. Pentode CCS: Would somebody check my work?
  225. PSU for 12V DC heaters
  226. 50C5 Triode strapped?
  227. homemade faceplates
  228. Can I build this?
  229. Heptode audio preamp? ECH83
  230. E130L in Triode mode
  231. class AB2 who's using it for hifi?
  232. Obscure radio tube
  233. another mingda
  234. tube hum in Aikido
  235. equivalent input impedance
  236. 6DG6GT "Magic Amp"
  237. Tektronix transformers
  238. *very* basic plate resistance Q
  239. Yaqin MC-5881A amplifier improvements
  240. Tube design software
  241. More wasted space
  242. PC Mount Novar Socket Suppliers
  243. Planning my first project
  244. Power Transformer leakage
  245. current sensing in series with anode resistors
  246. Please recommend a 9-pin dual triode = 417A
  247. Dynaco Pas 2
  248. Anyone have accurate charts for a KT90?
  249. Calling all Phono Preamp gurus, I'm looking for some plans
  250. Measuring Unknown Transformers

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