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  1. How to determine a tube is shorted?
  2. Power supply problem
  3. SS power trans for tube experiments
  4. how to set output current on G Pimm's CCS circuit?
  5. Tube testing questions
  6. Push Pull Output Transformer wiring problem
  7. shunt regulator using VR tubes (with ccs like g pimm) and circuit load
  8. Stepped attenuators vs. Carbon pots
  9. hum/buzz with pot all the way up
  10. VacuTrace ... In Chicago?
  11. Lifesaver question on earthing
  12. Affordable, but good attenuators?
  13. Gu50 Set ?
  14. mounting an EL34 upside-down
  15. Direct coupled PP 2a3 amp - maths needed!!
  16. My 1st scratch build complete......
  17. Very Basic EL84 or EL34 DIY Amp
  18. Curcio Daniel Preamp Mods?
  19. Tube designs: 45 driving 45/2a3/300b?
  20. Adding secondary of output transformer into cathodes of output stage ? Eico ST-70
  21. Marantz 8 B : Output Transformer
  22. has anyone used a fan on their project?
  23. Audio Research SP12 heater arrangement
  24. tv damper diodes
  25. volume pot quite close to a tube - is this okay?
  26. UTC s42 special series
  27. 6H30P preamp schematics
  28. Digital potentiometer corrupt tube amps
  29. Alternative filament supply for 01A line stage
  30. Lamination Size
  31. Yaqin MC10L and KT88
  32. Help me read tube data sheets
  33. Quick Question (Driving 6L6GC's)
  34. Cause for concern -- scorch mark in tube
  35. why not 10k pot
  36. Dynaco Stereo 70 Output Transformer
  37. 6CJ3 rectifier or 6D22S rectifier
  38. Back-to-Back trannies
  39. Hamfest in Toronto area next weekend
  40. st70 bass response
  41. Triode "Champ" transformer v Edcor
  42. Low vs High aka Series vs Parallel Filaments
  43. Bogen monster MO200A schematic
  44. The Great Tempe Audio Shootout
  45. opinions on this p-p kt88
  46. Any XLR Tube Buffer Plans?
  47. Mystery transformers
  48. I need help with my next project
  49. A thought on Cathode feedback
  50. EL34 SE, direct coupled
  51. Ccs
  52. Hybrid amp: ECH83 + TDA2030A
  53. Leaving tube preamp always powered on.
  54. Variable 6922 heater to cathode voltage limit...?
  55. Is this risky?
  56. What to do with some WE tubes and others
  57. 6B4G SRPP
  58. pentode in triode mode SE vs a DHT SE like 2a3/300b
  59. dynakit decware bottlehead ... which to pick
  60. 6JC6 triode strapped?
  61. Searching for Raw Turrets
  62. Help.. EZ81 power supply diagram
  63. Ear 8l6
  64. Voltage measurements from a blown 5AR4 vs. good 5Y3
  65. Sanity check on a 2A3 ultrapath with Pentode driver
  66. Star ground with dissimilar metals: concern?
  67. 5AR4 marked as 5V4GA?
  68. Calculating cathode bypass cap.
  69. Please need help! TUBE BIAS PROBE
  70. Aikido Phono Stage
  71. Using an El84 as a driver
  72. Transfromer value of this 300B circuit
  73. Chassis Layout & PS questions
  74. help needed for 1st DIY tube amp - Sakuma 845 SE
  75. Ideas for 4v filament triodes/pentodes
  76. Comments on Power Amp Viability
  77. Balanced active crossover advice
  78. The Tube Center
  79. Help1 with a 3 channel 2a3 amplifier
  80. volume control hum/noise
  81. PS choke magnetic induction
  82. Circlotron power supply question
  83. Autoformer as choke?
  84. E182CC
  85. Grundig Fine Arts OTL Amplifier
  86. Damper diodes, 6ax4 and or 6w4?
  87. Knight 333 / Pioneer SX 34B info needed.
  88. Gargantuan Linestage Output Capacitors
  89. Quad II Restoration
  90. Help identifying a tube.
  91. Tube filaments in series?
  92. Design of Resonant Input Choke PSU
  93. Dissimilar triode
  94. How important is the quality of a triode used as a cathode follower
  95. EL34B tubes
  96. Why not so common to split dual triodes between channels?
  97. In search of power supply schematic for phono preamp
  98. General Electric vs Toshiba 6L6's
  99. Audio Research Dual 75 Capacitor Source?
  100. Choosing A Cathode bypass capacitor
  101. 12AU7 SRPP buffer suggestions
  102. Pentode/triode switch question
  103. Lundahll 1669A Secondary voltage???
  104. Substituting tube rectifiers by silicon
  105. newbie question: is the connection to the output xformer somewhat odd?
  106. All quiet on the SN front - about darned time!
  107. Estimating power output
  108. Looking for KT88 Amplifier Schematic by Mikael Abdellah
  109. Comments on passive pre and cables
  110. curvecaptor
  111. 6b4g pushpull build!newbie
  112. Need help; I have "dog leg" shaped waveform on my amp
  113. Output Transformer Question?
  114. Urgent OT HELP needed ASAP please
  115. Questions on Triode Strapping
  116. Morgan Jones BALANCED?
  117. What are your RFI precautions?
  118. Pentodes without cathodes?
  119. help me
  120. Good quality 6600 CT OT
  121. Local Hamfest score!!!
  122. Unknown Transformer
  123. S5 11g help
  124. 6SN7 pre-amp
  125. These tube can be use for amplifier
  126. Any pitfalls to choke derived CT?
  127. Audio Research D76A bias adjustment
  128. I meet Mr. Morgan Jones
  129. st70 electrolytic caps
  130. Thank you SY
  131. el84 1 channel stopped working help
  132. Help! Weak Bass!
  133. never say never - 300B amps...
  134. 6aq5 Screen resistor?
  135. L. Tatro farm radios from 1930's.
  136. Published/DIY ultra-low THD designs?
  137. EL84 SE auto bias
  138. Kofi Annan in: "Oscillatin' in the Bevois Valley'"
  139. Subwoofer connections
  140. 6/30L2 - What to do with them ?
  141. PIONEER SA-810 Tube Amp Schematics
  142. EF86 Gm
  143. EL84/6BQ5 Ultra-Linear Push-Pull Recomendation
  144. Aria 6P14 makeover.
  145. switch for paralelled tube
  146. Curvecaptor with pentodes??
  147. Ground point for HF decoupling cap?
  148. Cancelling Harmonics
  149. Quiet Tube
  150. LM385 Adjustable voltage ref. diode as LED bias?
  151. Tubed Expression Pedal
  152. Any spice models around for AA5-esque battery tubes?
  153. Where to connect shielding
  154. Help 805 As that the friend makes to straighten even gallbladder machine
  155. studiogear of the beatles
  156. 6AK5 Triode Curves
  157. twisted pair signal, source selector and ground buss???
  158. Tiny Amplifiers
  159. A newly aquired Hum
  160. many jan tubes
  161. is this the correct way of adding a volume control?
  162. Basic DIY Valve Phono Stage
  163. 5879 Experience?
  164. personal jobs
  165. Wanted Triode strapped curves for pentode of ECL82.
  166. source selector / volume hum in Aikido
  167. DHTs and Cathode Bias
  168. Best SET driver stage with lots of B+?
  169. Tube Library Pspice error
  170. referencing DC heater to B+
  171. Double floating Circlotron
  172. Supply Capacitors ?
  173. Sakuma style Tango project
  174. MC10L is good or not
  175. Eico HF-20 & Claus Byrith PS voltage & power draw
  176. Voltage Regulator Tubes
  177. EL34 triode-connected grounding-grid curves?
  178. Pls help me understand AR SP6 circuit
  179. I'm looking for 417a/5842 Preamp Schematic without any Transformer, any suggestion ?
  180. Trouble in a new DIY amp.
  181. Suitable Transformers
  182. PT winding calculations HELP
  183. How to measure frequency response with a PC?
  184. Pspice Tube Generation Software
  185. Tektron tube amplifier Italy made
  186. What to do with 2x Stancor A3830?
  187. REQ: Schematics and tweaking tips
  188. Jadis Da 60 & 80
  189. 6L6 for a beginner, plus ECL86/6GW8
  190. Leak Stereo 20 clone? possibly with 6V6?
  191. Any comment on Vacuum State dpa300b??
  192. Radiotron Designers Handbook
  193. Kofi Annan in: "Buggin' the 'S' Outta Me!"
  194. 12B4 eqivalent : sonics-wise ?
  195. Any Eimac Scematics?
  196. What's a 6SL7 Good For?
  197. Where Can Buy 6c41
  198. would twisted pair from a network cable be suitable as hook-up wires inside an amp?
  199. use a 45 to drive a 45 ?
  200. Regulated heater reference
  201. Heater Elevation, how high?
  202. 6201 alternative
  203. 4V Tentlabs filament supply
  204. Difference between stereo & 2 monoblocks
  205. Parallel operation of triodes.
  206. input tubes using 6922?
  207. Looking for choices - affordable PP OPTs
  208. HH Scott Transformer #s
  209. Tips for rebuilding this amp?
  210. Need advice - what can I build with this power transformer?
  211. differences between K-12M and K-12G kits?
  212. 12B4 Line Stage with Fixed Bias?
  213. split push-pull output stage
  214. any thoughts/explanation on the power supply for this circuit?
  215. Where to begin on a PP?
  216. ProAc Tablette 50 Speakers
  217. Recognizing wiped out ECC's 81,82,83
  218. So tell me.... how did YOU get into tubes??
  219. 7189 or 7819 el84 tube?
  220. Question about Star Grounding
  221. Employment offered; breadboarding a Tube Monoblock
  222. Need help: Looking for ECF80 preamp schematic
  223. a 5AR4 after a diode bridge? what is the purpose?
  224. 807 & Pe 06/40n
  225. Board layout design
  226. 12AX7, 12AU7 Substitution
  227. 200,000 Tubes for sale in Michigan
  228. Ground scheme
  229. Help on 6L6GC Triode PP..working points..
  230. A neat trick?
  231. Setup & Implementation of G Pimm's Self-Bias CCS
  232. Tube Preamp FM interference
  233. Parafeed 6EM7 with 2k load?
  234. Need Help on HEATHKIT W-5M Power Transformer
  235. Fully isolated oilbath transformer.
  236. small signal DHT or DHP like AVVT20/8?
  237. EL 84 Pentode Config.
  238. Amp Tubes
  239. Can I replace the 1M volume pot with a 100K one in my HK A300?
  240. what's a hum band?
  241. Tube phono pre-amp needed.
  242. U/L or triode mode on music angel amp
  243. Why do some people dislike ultralinear?
  244. Adaptive class A
  245. 6X4 Tube rectifier.
  246. AN Conquest Clone modification
  247. Beautiful tubes.
  248. Selectable EL34/6L6 Amp OT
  249. Simple circlotron amp
  250. 12AX7 how many is enough?

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