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  1. Affordable, but good attenuators?
  2. Gu50 Set ?
  3. mounting an EL34 upside-down
  4. Direct coupled PP 2a3 amp - maths needed!!
  5. My 1st scratch build complete......
  6. Very Basic EL84 or EL34 DIY Amp
  7. Curcio Daniel Preamp Mods?
  8. Tube designs: 45 driving 45/2a3/300b?
  9. Adding secondary of output transformer into cathodes of output stage ? Eico ST-70
  10. Marantz 8 B : Output Transformer
  11. has anyone used a fan on their project?
  12. Audio Research SP12 heater arrangement
  13. tv damper diodes
  14. volume pot quite close to a tube - is this okay?
  15. UTC s42 special series
  16. 6H30P preamp schematics
  17. Digital potentiometer corrupt tube amps
  18. Alternative filament supply for 01A line stage
  19. Lamination Size
  20. Yaqin MC10L and KT88
  21. Help me read tube data sheets
  22. Quick Question (Driving 6L6GC's)
  23. Cause for concern -- scorch mark in tube
  24. why not 10k pot
  25. Dynaco Stereo 70 Output Transformer
  26. 6CJ3 rectifier or 6D22S rectifier
  27. Back-to-Back trannies
  28. Hamfest in Toronto area next weekend
  29. st70 bass response
  30. Triode "Champ" transformer v Edcor
  31. Low vs High aka Series vs Parallel Filaments
  32. Bogen monster MO200A schematic
  33. The Great Tempe Audio Shootout
  34. opinions on this p-p kt88
  35. Any XLR Tube Buffer Plans?
  36. Mystery transformers
  37. I need help with my next project
  38. A thought on Cathode feedback
  39. EL34 SE, direct coupled
  40. Ccs
  41. Hybrid amp: ECH83 + TDA2030A
  42. Leaving tube preamp always powered on.
  43. Variable 6922 heater to cathode voltage limit...?
  44. Is this risky?
  45. What to do with some WE tubes and others
  46. 6B4G SRPP
  47. pentode in triode mode SE vs a DHT SE like 2a3/300b
  48. dynakit decware bottlehead ... which to pick
  49. 6JC6 triode strapped?
  50. Searching for Raw Turrets
  51. Help.. EZ81 power supply diagram
  52. Ear 8l6
  53. Voltage measurements from a blown 5AR4 vs. good 5Y3
  54. Sanity check on a 2A3 ultrapath with Pentode driver
  55. Star ground with dissimilar metals: concern?
  56. 5AR4 marked as 5V4GA?
  57. Calculating cathode bypass cap.
  58. Please need help! TUBE BIAS PROBE
  59. Aikido Phono Stage
  60. Using an El84 as a driver
  61. Transfromer value of this 300B circuit
  62. Chassis Layout & PS questions
  63. help needed for 1st DIY tube amp - Sakuma 845 SE
  64. Ideas for 4v filament triodes/pentodes
  65. Comments on Power Amp Viability
  66. Balanced active crossover advice
  67. The Tube Center
  68. Help1 with a 3 channel 2a3 amplifier
  69. volume control hum/noise
  70. PS choke magnetic induction
  71. Circlotron power supply question
  72. Autoformer as choke?
  73. E182CC
  74. Grundig Fine Arts OTL Amplifier
  75. Damper diodes, 6ax4 and or 6w4?
  76. Knight 333 / Pioneer SX 34B info needed.
  77. Gargantuan Linestage Output Capacitors
  78. Quad II Restoration
  79. Help identifying a tube.
  80. Tube filaments in series?
  81. Design of Resonant Input Choke PSU
  82. Dissimilar triode
  83. How important is the quality of a triode used as a cathode follower
  84. EL34B tubes
  85. Why not so common to split dual triodes between channels?
  86. In search of power supply schematic for phono preamp
  87. General Electric vs Toshiba 6L6's
  88. Audio Research Dual 75 Capacitor Source?
  89. Choosing A Cathode bypass capacitor
  90. 12AU7 SRPP buffer suggestions
  91. Pentode/triode switch question
  92. Lundahll 1669A Secondary voltage???
  93. Substituting tube rectifiers by silicon
  94. newbie question: is the connection to the output xformer somewhat odd?
  95. All quiet on the SN front - about darned time!
  96. Estimating power output
  97. Looking for KT88 Amplifier Schematic by Mikael Abdellah
  98. Comments on passive pre and cables
  99. curvecaptor
  100. 6b4g pushpull build!newbie
  101. Need help; I have "dog leg" shaped waveform on my amp
  102. Output Transformer Question?
  103. Urgent OT HELP needed ASAP please
  104. Questions on Triode Strapping
  105. Morgan Jones BALANCED?
  106. What are your RFI precautions?
  107. Pentodes without cathodes?
  108. help me
  109. Good quality 6600 CT OT
  110. Local Hamfest score!!!
  111. Unknown Transformer
  112. S5 11g help
  113. 6SN7 pre-amp
  114. These tube can be use for amplifier
  115. Any pitfalls to choke derived CT?
  116. Audio Research D76A bias adjustment
  117. I meet Mr. Morgan Jones
  118. st70 electrolytic caps
  119. Thank you SY
  120. el84 1 channel stopped working help
  121. Help! Weak Bass!
  122. never say never - 300B amps...
  123. 6aq5 Screen resistor?
  124. L. Tatro farm radios from 1930's.
  125. Published/DIY ultra-low THD designs?
  126. EL84 SE auto bias
  127. Kofi Annan in: "Oscillatin' in the Bevois Valley'"
  128. Subwoofer connections
  129. 6/30L2 - What to do with them ?
  130. PIONEER SA-810 Tube Amp Schematics
  131. EF86 Gm
  132. EL84/6BQ5 Ultra-Linear Push-Pull Recomendation
  133. Aria 6P14 makeover.
  134. switch for paralelled tube
  135. Curvecaptor with pentodes??
  136. Ground point for HF decoupling cap?
  137. Cancelling Harmonics
  138. Quiet Tube
  139. LM385 Adjustable voltage ref. diode as LED bias?
  140. Tubed Expression Pedal
  141. Any spice models around for AA5-esque battery tubes?
  142. Where to connect shielding
  143. Help 805 As that the friend makes to straighten even gallbladder machine
  144. studiogear of the beatles
  145. 6AK5 Triode Curves
  146. twisted pair signal, source selector and ground buss???
  147. Tiny Amplifiers
  148. A newly aquired Hum
  149. many jan tubes
  150. is this the correct way of adding a volume control?
  151. Basic DIY Valve Phono Stage
  152. 5879 Experience?
  153. personal jobs
  154. Wanted Triode strapped curves for pentode of ECL82.
  155. source selector / volume hum in Aikido
  156. DHTs and Cathode Bias
  157. Best SET driver stage with lots of B+?
  158. Tube Library Pspice error
  159. referencing DC heater to B+
  160. Double floating Circlotron
  161. Supply Capacitors ?
  162. Sakuma style Tango project
  163. MC10L is good or not
  164. Eico HF-20 & Claus Byrith PS voltage & power draw
  165. Voltage Regulator Tubes
  166. EL34 triode-connected grounding-grid curves?
  167. Pls help me understand AR SP6 circuit
  168. I'm looking for 417a/5842 Preamp Schematic without any Transformer, any suggestion ?
  169. Trouble in a new DIY amp.
  170. Suitable Transformers
  171. PT winding calculations HELP
  172. How to measure frequency response with a PC?
  173. Pspice Tube Generation Software
  174. Tektron tube amplifier Italy made
  175. What to do with 2x Stancor A3830?
  176. REQ: Schematics and tweaking tips
  177. Jadis Da 60 & 80
  178. 6L6 for a beginner, plus ECL86/6GW8
  179. Leak Stereo 20 clone? possibly with 6V6?
  180. Any comment on Vacuum State dpa300b??
  181. Radiotron Designers Handbook
  182. Kofi Annan in: "Buggin' the 'S' Outta Me!"
  183. 12B4 eqivalent : sonics-wise ?
  184. Any Eimac Scematics?
  185. What's a 6SL7 Good For?
  186. Where Can Buy 6c41
  187. would twisted pair from a network cable be suitable as hook-up wires inside an amp?
  188. use a 45 to drive a 45 ?
  189. Regulated heater reference
  190. Heater Elevation, how high?
  191. 6201 alternative
  192. 4V Tentlabs filament supply
  193. Difference between stereo & 2 monoblocks
  194. Parallel operation of triodes.
  195. input tubes using 6922?
  196. Looking for choices - affordable PP OPTs
  197. HH Scott Transformer #s
  198. Tips for rebuilding this amp?
  199. Need advice - what can I build with this power transformer?
  200. differences between K-12M and K-12G kits?
  201. 12B4 Line Stage with Fixed Bias?
  202. split push-pull output stage
  203. any thoughts/explanation on the power supply for this circuit?
  204. Where to begin on a PP?
  205. ProAc Tablette 50 Speakers
  206. Recognizing wiped out ECC's 81,82,83
  207. So tell me.... how did YOU get into tubes??
  208. 7189 or 7819 el84 tube?
  209. Question about Star Grounding
  210. Employment offered; breadboarding a Tube Monoblock
  211. Need help: Looking for ECF80 preamp schematic
  212. a 5AR4 after a diode bridge? what is the purpose?
  213. Board layout design
  214. 12AX7, 12AU7 Substitution
  215. 807 & Pe 06/40n
  216. 200,000 Tubes for sale in Michigan
  217. Ground scheme
  218. Help on 6L6GC Triode PP..working points..
  219. A neat trick?
  220. Setup & Implementation of G Pimm's Self-Bias CCS
  221. Tube Preamp FM interference
  222. Parafeed 6EM7 with 2k load?
  223. Need Help on HEATHKIT W-5M Power Transformer
  224. Fully isolated oilbath transformer.
  225. small signal DHT or DHP like AVVT20/8?
  226. EL 84 Pentode Config.
  227. Amp Tubes
  228. Can I replace the 1M volume pot with a 100K one in my HK A300?
  229. what's a hum band?
  230. Tube phono pre-amp needed.
  231. U/L or triode mode on music angel amp
  232. Why do some people dislike ultralinear?
  233. Adaptive class A
  234. 6X4 Tube rectifier.
  235. AN Conquest Clone modification
  236. Beautiful tubes.
  237. Selectable EL34/6L6 Amp OT
  238. Simple circlotron amp
  239. 12AX7 how many is enough?
  240. samples of 300B in pse or pp
  241. power supply choke with a connection for AC ground?
  242. musical fidelity x10d schematic
  243. Pot Value
  244. Eico 666 (satan's choice) tube tester help.
  245. Minor crackling in new valves
  246. Aikido linestage Help Needed
  247. Scott 299A Schematic
  248. Q on PP & current mirrors
  249. Calculating PT headroom in PP class AB
  250. EL34 Failure

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