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  1. Cause for concern -- scorch mark in tube
  2. why not 10k pot
  3. Dynaco Stereo 70 Output Transformer
  4. 6CJ3 rectifier or 6D22S rectifier
  5. Back-to-Back trannies
  6. Spring Reverb transformer
  7. Hamfest in Toronto area next weekend
  8. st70 bass response
  9. Triode "Champ" transformer v Edcor
  10. Low vs High aka Series vs Parallel Filaments
  11. Bogen monster MO200A schematic
  12. The Great Tempe Audio Shootout
  13. opinions on this p-p kt88
  14. Any XLR Tube Buffer Plans?
  15. Mystery transformers
  16. I need help with my next project
  17. A thought on Cathode feedback
  18. EL34 SE, direct coupled
  19. Ccs
  20. Hybrid amp: ECH83 + TDA2030A
  21. Leaving tube preamp always powered on.
  22. Variable 6922 heater to cathode voltage limit...?
  23. Is this risky?
  24. What to do with some WE tubes and others
  25. 6B4G SRPP
  26. pentode in triode mode SE vs a DHT SE like 2a3/300b
  27. dynakit decware bottlehead ... which to pick
  28. 6JC6 triode strapped?
  29. Searching for Raw Turrets
  30. Help.. EZ81 power supply diagram
  31. Ear 8l6
  32. Bogen H-30 guitar mod
  33. Voltage measurements from a blown 5AR4 vs. good 5Y3
  34. Sanity check on a 2A3 ultrapath with Pentode driver
  35. Star ground with dissimilar metals: concern?
  36. 5AR4 marked as 5V4GA?
  37. Calculating cathode bypass cap.
  38. Please need help! TUBE BIAS PROBE
  39. Aikido Phono Stage
  40. Using an El84 as a driver
  41. Transfromer value of this 300B circuit
  42. Chassis Layout & PS questions
  43. help needed for 1st DIY tube amp - Sakuma 845 SE
  44. Ideas for 4v filament triodes/pentodes
  45. Comments on Power Amp Viability
  46. Balanced active crossover advice
  47. The Tube Center
  48. Help1 with a 3 channel 2a3 amplifier
  49. volume control hum/noise
  50. PS choke magnetic induction
  51. Circlotron power supply question
  52. Autoformer as choke?
  53. E182CC
  54. Fender Hotrod Deville 212
  55. Grundig Fine Arts OTL Amplifier
  56. Damper diodes, 6ax4 and or 6w4?
  57. Knight 333 / Pioneer SX 34B info needed.
  58. Gargantuan Linestage Output Capacitors
  59. Quad II Restoration
  60. Help identifying a tube.
  61. Tube filaments in series?
  62. Design of Resonant Input Choke PSU
  63. Dissimilar triode
  64. How important is the quality of a triode used as a cathode follower
  65. EL34B tubes
  66. Why not so common to split dual triodes between channels?
  67. In search of power supply schematic for phono preamp
  68. General Electric vs Toshiba 6L6's
  69. Audio Research Dual 75 Capacitor Source?
  70. Choosing A Cathode bypass capacitor
  71. 12AU7 SRPP buffer suggestions
  72. Pentode/triode switch question
  73. Lundahll 1669A Secondary voltage???
  74. Substituting tube rectifiers by silicon
  75. newbie question: is the connection to the output xformer somewhat odd?
  76. All quiet on the SN front - about darned time!
  77. Estimating power output
  78. Looking for KT88 Amplifier Schematic by Mikael Abdellah
  79. Comments on passive pre and cables
  80. curvecaptor
  81. 6b4g pushpull build!newbie
  82. Need help; I have "dog leg" shaped waveform on my amp
  83. Output Transformer Question?
  84. Urgent OT HELP needed ASAP please
  85. Questions on Triode Strapping
  86. Morgan Jones BALANCED?
  87. What are your RFI precautions?
  88. Pentodes without cathodes?
  89. help me
  90. Good quality 6600 CT OT
  91. Local Hamfest score!!!
  92. Unknown Transformer
  93. S5 11g help
  94. 6SN7 pre-amp
  95. These tube can be use for amplifier
  96. Any pitfalls to choke derived CT?
  97. Audio Research D76A bias adjustment
  98. I meet Mr. Morgan Jones
  99. st70 electrolytic caps
  100. Thank you SY
  101. el84 1 channel stopped working help
  102. Help! Weak Bass!
  103. never say never - 300B amps...
  104. 6aq5 Screen resistor?
  105. L. Tatro farm radios from 1930's.
  106. Published/DIY ultra-low THD designs?
  107. EL84 SE auto bias
  108. Kofi Annan in: "Oscillatin' in the Bevois Valley'"
  109. Subwoofer connections
  110. 6/30L2 - What to do with them ?
  111. PIONEER SA-810 Tube Amp Schematics
  112. EF86 Gm
  113. EL84/6BQ5 Ultra-Linear Push-Pull Recomendation
  114. Aria 6P14 makeover.
  115. switch for paralelled tube
  116. Curvecaptor with pentodes??
  117. Ground point for HF decoupling cap?
  118. Cancelling Harmonics
  119. Quiet Tube
  120. LM385 Adjustable voltage ref. diode as LED bias?
  121. Tubed Expression Pedal
  122. Any spice models around for AA5-esque battery tubes?
  123. Where to connect shielding
  124. Bogen K15 convert to guitar amp
  125. Help 805 As that the friend makes to straighten even gallbladder machine
  126. studiogear of the beatles
  127. 6AK5 Triode Curves
  128. twisted pair signal, source selector and ground buss???
  129. Tiny Amplifiers
  130. A newly aquired Hum
  131. many jan tubes
  132. is this the correct way of adding a volume control?
  133. Basic DIY Valve Phono Stage
  134. 5879 Experience?
  135. personal jobs
  136. Wanted Triode strapped curves for pentode of ECL82.
  137. source selector / volume hum in Aikido
  138. DHTs and Cathode Bias
  139. Best SET driver stage with lots of B+?
  140. Tube Library Pspice error
  141. referencing DC heater to B+
  142. Double floating Circlotron
  143. Supply Capacitors ?
  144. Sakuma style Tango project
  145. MC10L is good or not
  146. Eico HF-20 & Claus Byrith PS voltage & power draw
  147. Voltage Regulator Tubes
  148. EL34 triode-connected grounding-grid curves?
  149. Pls help me understand AR SP6 circuit
  150. good begginer project (ax84 v.s. boozhound)
  151. I'm looking for 417a/5842 Preamp Schematic without any Transformer, any suggestion ?
  152. Trouble in a new DIY amp.
  153. Suitable Transformers
  154. PT winding calculations HELP
  155. How to measure frequency response with a PC?
  156. Pspice Tube Generation Software
  157. Tektron tube amplifier Italy made
  158. What to do with 2x Stancor A3830?
  159. REQ: Schematics and tweaking tips
  160. Jadis Da 60 & 80
  161. 6L6 for a beginner, plus ECL86/6GW8
  162. Leak Stereo 20 clone? possibly with 6V6?
  163. Any comment on Vacuum State dpa300b??
  164. Radiotron Designers Handbook
  165. Kofi Annan in: "Buggin' the 'S' Outta Me!"
  166. 12B4 eqivalent : sonics-wise ?
  167. Any Eimac Scematics?
  168. What's a 6SL7 Good For?
  169. Where Can Buy 6c41
  170. would twisted pair from a network cable be suitable as hook-up wires inside an amp?
  171. use a 45 to drive a 45 ?
  172. Regulated heater reference
  173. Heater Elevation, how high?
  174. 6201 alternative
  175. 4V Tentlabs filament supply
  176. Difference between stereo & 2 monoblocks
  177. Parallel operation of triodes.
  178. input tubes using 6922?
  179. Looking for choices - affordable PP OPTs
  180. removing HF damping pF caps for guitar
  181. HH Scott Transformer #s
  182. Tips for rebuilding this amp?
  183. Need advice - what can I build with this power transformer?
  184. Source for high voltage electro caps
  185. differences between K-12M and K-12G kits?
  186. 12B4 Line Stage with Fixed Bias?
  187. split push-pull output stage
  188. any thoughts/explanation on the power supply for this circuit?
  189. Where to begin on a PP?
  190. ProAc Tablette 50 Speakers
  191. Recognizing wiped out ECC's 81,82,83
  192. So tell me.... how did YOU get into tubes??
  193. 7189 or 7819 el84 tube?
  194. Question about Star Grounding
  195. Employment offered; breadboarding a Tube Monoblock
  196. Need help: Looking for ECF80 preamp schematic
  197. a 5AR4 after a diode bridge? what is the purpose?
  198. 807 & Pe 06/40n
  199. Board layout design
  200. 12AX7, 12AU7 Substitution
  201. 200,000 Tubes for sale in Michigan
  202. Ground scheme
  203. Help on 6L6GC Triode PP..working points..
  204. A neat trick?
  205. Setup & Implementation of G Pimm's Self-Bias CCS
  206. Tube Preamp FM interference
  207. Parafeed 6EM7 with 2k load?
  208. Need Help on HEATHKIT W-5M Power Transformer
  209. Fully isolated oilbath transformer.
  210. small signal DHT or DHP like AVVT20/8?
  211. EL 84 Pentode Config.
  212. Amp Tubes
  213. Can I replace the 1M volume pot with a 100K one in my HK A300?
  214. what's a hum band?
  215. Tube phono pre-amp needed.
  216. U/L or triode mode on music angel amp
  217. Why do some people dislike ultralinear?
  218. Adaptive class A
  219. 6X4 Tube rectifier.
  220. AN Conquest Clone modification
  221. Beautiful tubes.
  222. Selectable EL34/6L6 Amp OT
  223. Simple circlotron amp
  224. 12AX7 how many is enough?
  225. samples of 300B in pse or pp
  226. power supply choke with a connection for AC ground?
  227. Heathkit A7E for guitar - preamp gain
  228. musical fidelity x10d schematic
  229. Pot Value
  230. Eico 666 (satan's choice) tube tester help.
  231. Finally built a subminiature guitar amp... now I need help!
  232. Minor crackling in new valves
  233. Matchless Lightning v Spitfire
  234. Aikido linestage Help Needed
  235. Scott 299A Schematic
  236. Q on PP & current mirrors
  237. Calculating PT headroom in PP class AB
  238. EL34 Failure
  239. Aikido Transformer recommendation
  240. No mains transformer B+ ?
  241. Help with horizontal mounting of 01-A and VR tubes
  242. twisted pair wiring on a tube amp
  243. Calculating SE Output Question
  244. Fixed-Bias Williamson EL34
  245. Bogen CHB-35 Preamp Mod
  246. resistors and sonic effects?
  247. tamura F-683 pole question
  248. EC52--Plate choke--300B/45/2a3/50/EL34 SE
  249. vtl deluxe 300 mb
  250. Is SD a Schottky Diode in this schematic?

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