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  1. 6H30P preamp schematics
  2. Digital potentiometer corrupt tube amps
  3. Alternative filament supply for 01A line stage
  4. Lamination Size
  5. Yaqin MC10L and KT88
  6. Help me read tube data sheets
  7. Quick Question (Driving 6L6GC's)
  8. Cause for concern -- scorch mark in tube
  9. why not 10k pot
  10. Dynaco Stereo 70 Output Transformer
  11. 6CJ3 rectifier or 6D22S rectifier
  12. Back-to-Back trannies
  13. Hamfest in Toronto area next weekend
  14. st70 bass response
  15. Triode "Champ" transformer v Edcor
  16. Low vs High aka Series vs Parallel Filaments
  17. Bogen monster MO200A schematic
  18. The Great Tempe Audio Shootout
  19. opinions on this p-p kt88
  20. Any XLR Tube Buffer Plans?
  21. Mystery transformers
  22. I need help with my next project
  23. A thought on Cathode feedback
  24. EL34 SE, direct coupled
  25. Ccs
  26. Hybrid amp: ECH83 + TDA2030A
  27. Leaving tube preamp always powered on.
  28. Variable 6922 heater to cathode voltage limit...?
  29. Is this risky?
  30. What to do with some WE tubes and others
  31. 6B4G SRPP
  32. pentode in triode mode SE vs a DHT SE like 2a3/300b
  33. dynakit decware bottlehead ... which to pick
  34. 6JC6 triode strapped?
  35. Help.. EZ81 power supply diagram
  36. Ear 8l6
  37. Voltage measurements from a blown 5AR4 vs. good 5Y3
  38. Sanity check on a 2A3 ultrapath with Pentode driver
  39. Star ground with dissimilar metals: concern?
  40. 5AR4 marked as 5V4GA?
  41. Calculating cathode bypass cap.
  42. Please need help! TUBE BIAS PROBE
  43. Aikido Phono Stage
  44. Using an El84 as a driver
  45. Transfromer value of this 300B circuit
  46. Chassis Layout & PS questions
  47. help needed for 1st DIY tube amp - Sakuma 845 SE
  48. Ideas for 4v filament triodes/pentodes
  49. Comments on Power Amp Viability
  50. Balanced active crossover advice
  51. The Tube Center
  52. Help1 with a 3 channel 2a3 amplifier
  53. volume control hum/noise
  54. PS choke magnetic induction
  55. Circlotron power supply question
  56. Autoformer as choke?
  57. E182CC
  58. Grundig Fine Arts OTL Amplifier
  59. Damper diodes, 6ax4 and or 6w4?
  60. Knight 333 / Pioneer SX 34B info needed.
  61. Gargantuan Linestage Output Capacitors
  62. Quad II Restoration
  63. Help identifying a tube.
  64. Tube filaments in series?
  65. Design of Resonant Input Choke PSU
  66. Dissimilar triode
  67. How important is the quality of a triode used as a cathode follower
  68. EL34B tubes
  69. Why not so common to split dual triodes between channels?
  70. In search of power supply schematic for phono preamp
  71. General Electric vs Toshiba 6L6's
  72. Audio Research Dual 75 Capacitor Source?
  73. Choosing A Cathode bypass capacitor
  74. 12AU7 SRPP buffer suggestions
  75. Pentode/triode switch question
  76. Lundahll 1669A Secondary voltage???
  77. Substituting tube rectifiers by silicon
  78. newbie question: is the connection to the output xformer somewhat odd?
  79. All quiet on the SN front - about darned time!
  80. Estimating power output
  81. Looking for KT88 Amplifier Schematic by Mikael Abdellah
  82. Comments on passive pre and cables
  83. curvecaptor
  84. 6b4g pushpull build!newbie
  85. Need help; I have "dog leg" shaped waveform on my amp
  86. Output Transformer Question?
  87. Urgent OT HELP needed ASAP please
  88. Questions on Triode Strapping
  89. Morgan Jones BALANCED?
  90. What are your RFI precautions?
  91. Pentodes without cathodes?
  92. help me
  93. Good quality 6600 CT OT
  94. Local Hamfest score!!!
  95. Unknown Transformer
  96. S5 11g help
  97. 6SN7 pre-amp
  98. These tube can be use for amplifier
  99. Any pitfalls to choke derived CT?
  100. Audio Research D76A bias adjustment
  101. I meet Mr. Morgan Jones
  102. st70 electrolytic caps
  103. Thank you SY
  104. el84 1 channel stopped working help
  105. Help! Weak Bass!
  106. never say never - 300B amps...
  107. 6aq5 Screen resistor?
  108. L. Tatro farm radios from 1930's.
  109. Published/DIY ultra-low THD designs?
  110. EL84 SE auto bias
  111. Kofi Annan in: "Oscillatin' in the Bevois Valley'"
  112. Subwoofer connections
  113. 6/30L2 - What to do with them ?
  114. PIONEER SA-810 Tube Amp Schematics
  115. EF86 Gm
  116. EL84/6BQ5 Ultra-Linear Push-Pull Recomendation
  117. Aria 6P14 makeover.
  118. switch for paralelled tube
  119. Curvecaptor with pentodes??
  120. Ground point for HF decoupling cap?
  121. Cancelling Harmonics
  122. Quiet Tube
  123. LM385 Adjustable voltage ref. diode as LED bias?
  124. Tubed Expression Pedal
  125. Any spice models around for AA5-esque battery tubes?
  126. Where to connect shielding
  127. Help 805 As that the friend makes to straighten even gallbladder machine
  128. studiogear of the beatles
  129. 6AK5 Triode Curves
  130. twisted pair signal, source selector and ground buss???
  131. Tiny Amplifiers
  132. A newly aquired Hum
  133. many jan tubes
  134. is this the correct way of adding a volume control?
  135. Basic DIY Valve Phono Stage
  136. 5879 Experience?
  137. personal jobs
  138. Wanted Triode strapped curves for pentode of ECL82.
  139. source selector / volume hum in Aikido
  140. DHTs and Cathode Bias
  141. Best SET driver stage with lots of B+?
  142. Tube Library Pspice error
  143. referencing DC heater to B+
  144. Double floating Circlotron
  145. Supply Capacitors ?
  146. Sakuma style Tango project
  147. MC10L is good or not
  148. Eico HF-20 & Claus Byrith PS voltage & power draw
  149. Voltage Regulator Tubes
  150. EL34 triode-connected grounding-grid curves?
  151. Pls help me understand AR SP6 circuit
  152. I'm looking for 417a/5842 Preamp Schematic without any Transformer, any suggestion ?
  153. Trouble in a new DIY amp.
  154. Suitable Transformers
  155. PT winding calculations HELP
  156. How to measure frequency response with a PC?
  157. Pspice Tube Generation Software
  158. Tektron tube amplifier Italy made
  159. What to do with 2x Stancor A3830?
  160. REQ: Schematics and tweaking tips
  161. Jadis Da 60 & 80
  162. 6L6 for a beginner, plus ECL86/6GW8
  163. Leak Stereo 20 clone? possibly with 6V6?
  164. Any comment on Vacuum State dpa300b??
  165. Radiotron Designers Handbook
  166. Kofi Annan in: "Buggin' the 'S' Outta Me!"
  167. 12B4 eqivalent : sonics-wise ?
  168. Any Eimac Scematics?
  169. What's a 6SL7 Good For?
  170. Where Can Buy 6c41
  171. would twisted pair from a network cable be suitable as hook-up wires inside an amp?
  172. use a 45 to drive a 45 ?
  173. Regulated heater reference
  174. Heater Elevation, how high?
  175. 6201 alternative
  176. 4V Tentlabs filament supply
  177. Difference between stereo & 2 monoblocks
  178. Parallel operation of triodes.
  179. input tubes using 6922?
  180. Looking for choices - affordable PP OPTs
  181. HH Scott Transformer #s
  182. Tips for rebuilding this amp?
  183. Need advice - what can I build with this power transformer?
  184. differences between K-12M and K-12G kits?
  185. 12B4 Line Stage with Fixed Bias?
  186. split push-pull output stage
  187. any thoughts/explanation on the power supply for this circuit?
  188. Where to begin on a PP?
  189. ProAc Tablette 50 Speakers
  190. Recognizing wiped out ECC's 81,82,83
  191. So tell me.... how did YOU get into tubes??
  192. 7189 or 7819 el84 tube?
  193. Question about Star Grounding
  194. Employment offered; breadboarding a Tube Monoblock
  195. Need help: Looking for ECF80 preamp schematic
  196. a 5AR4 after a diode bridge? what is the purpose?
  197. 807 & Pe 06/40n
  198. Board layout design
  199. 12AX7, 12AU7 Substitution
  200. 200,000 Tubes for sale in Michigan
  201. Ground scheme
  202. Help on 6L6GC Triode PP..working points..
  203. A neat trick?
  204. Setup & Implementation of G Pimm's Self-Bias CCS
  205. Tube Preamp FM interference
  206. Parafeed 6EM7 with 2k load?
  207. Need Help on HEATHKIT W-5M Power Transformer
  208. Fully isolated oilbath transformer.
  209. small signal DHT or DHP like AVVT20/8?
  210. EL 84 Pentode Config.
  211. Amp Tubes
  212. Can I replace the 1M volume pot with a 100K one in my HK A300?
  213. what's a hum band?
  214. Tube phono pre-amp needed.
  215. U/L or triode mode on music angel amp
  216. Why do some people dislike ultralinear?
  217. Adaptive class A
  218. 6X4 Tube rectifier.
  219. AN Conquest Clone modification
  220. Beautiful tubes.
  221. Selectable EL34/6L6 Amp OT
  222. Simple circlotron amp
  223. 12AX7 how many is enough?
  224. samples of 300B in pse or pp
  225. power supply choke with a connection for AC ground?
  226. musical fidelity x10d schematic
  227. Pot Value
  228. Minor crackling in new valves
  229. Aikido linestage Help Needed
  230. Scott 299A Schematic
  231. Q on PP & current mirrors
  232. Calculating PT headroom in PP class AB
  233. EL34 Failure
  234. Aikido Transformer recommendation
  235. No mains transformer B+ ?
  236. Help with horizontal mounting of 01-A and VR tubes
  237. twisted pair wiring on a tube amp
  238. Calculating SE Output Question
  239. Fixed-Bias Williamson EL34
  240. Bogen CHB-35 Preamp Mod
  241. resistors and sonic effects?
  242. tamura F-683 pole question
  243. EC52--Plate choke--300B/45/2a3/50/EL34 SE
  244. vtl deluxe 300 mb
  245. Is SD a Schottky Diode in this schematic?
  246. Maida regulator
  247. 572B vs 845 vs 211 SE
  248. Yet Another EL84 Amp
  249. Regulator for tube pre
  250. referencing heater supply ground to B+

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