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  1. Look for a beefy driver tube.
  2. ECC81
  3. 5687 v.s. 6922 preamp/xover
  4. amorphous iron core good or not
  5. Pre-Amp
  6. submini tube preamp is a success
  7. Roll off frequency.
  8. Materials Technology for Electron Tubes by Walter H. Kohl
  9. Grundig TK 46 manual
  10. I'm anti-expensive audio parts but man, a good capacitor can make a difference
  11. How to determine a tube is shorted?
  12. Power supply problem
  13. SS power trans for tube experiments
  14. how to set output current on G Pimm's CCS circuit?
  15. Tube testing questions
  16. Push Pull Output Transformer wiring problem
  17. shunt regulator using VR tubes (with ccs like g pimm) and circuit load
  18. Stepped attenuators vs. Carbon pots
  19. hum/buzz with pot all the way up
  20. Cap and resistor types in guitar tube amp
  21. VacuTrace ... In Chicago?
  22. Lifesaver question on earthing
  23. Affordable, but good attenuators?
  24. Gu50 Set ?
  25. mounting an EL34 upside-down
  26. Direct coupled PP 2a3 amp - maths needed!!
  27. My 1st scratch build complete......
  28. Very Basic EL84 or EL34 DIY Amp
  29. Curcio Daniel Preamp Mods?
  30. Tube designs: 45 driving 45/2a3/300b?
  31. Adding secondary of output transformer into cathodes of output stage ? Eico ST-70
  32. Marantz 8 B : Output Transformer
  33. has anyone used a fan on their project?
  34. Audio Research SP12 heater arrangement
  35. tv damper diodes
  36. volume pot quite close to a tube - is this okay?
  37. UTC s42 special series
  38. 6H30P preamp schematics
  39. Digital potentiometer corrupt tube amps
  40. Alternative filament supply for 01A line stage
  41. Lamination Size
  42. Yaqin MC10L and KT88
  43. Help me read tube data sheets
  44. Quick Question (Driving 6L6GC's)
  45. Cause for concern -- scorch mark in tube
  46. why not 10k pot
  47. Dynaco Stereo 70 Output Transformer
  48. 6CJ3 rectifier or 6D22S rectifier
  49. Back-to-Back trannies
  50. Spring Reverb transformer
  51. Hamfest in Toronto area next weekend
  52. st70 bass response
  53. Triode "Champ" transformer v Edcor
  54. Low vs High aka Series vs Parallel Filaments
  55. Bogen monster MO200A schematic
  56. The Great Tempe Audio Shootout
  57. opinions on this p-p kt88
  58. Any XLR Tube Buffer Plans?
  59. Mystery transformers
  60. I need help with my next project
  61. A thought on Cathode feedback
  62. EL34 SE, direct coupled
  63. Ccs
  64. Hybrid amp: ECH83 + TDA2030A
  65. Leaving tube preamp always powered on.
  66. Variable 6922 heater to cathode voltage limit...?
  67. Is this risky?
  68. What to do with some WE tubes and others
  69. 6B4G SRPP
  70. pentode in triode mode SE vs a DHT SE like 2a3/300b
  71. dynakit decware bottlehead ... which to pick
  72. 6JC6 triode strapped?
  73. Searching for Raw Turrets
  74. Help.. EZ81 power supply diagram
  75. Ear 8l6
  76. Bogen H-30 guitar mod
  77. Voltage measurements from a blown 5AR4 vs. good 5Y3
  78. Sanity check on a 2A3 ultrapath with Pentode driver
  79. Star ground with dissimilar metals: concern?
  80. 5AR4 marked as 5V4GA?
  81. Calculating cathode bypass cap.
  82. Please need help! TUBE BIAS PROBE
  83. Aikido Phono Stage
  84. Using an El84 as a driver
  85. Transfromer value of this 300B circuit
  86. Chassis Layout & PS questions
  87. help needed for 1st DIY tube amp - Sakuma 845 SE
  88. Ideas for 4v filament triodes/pentodes
  89. Comments on Power Amp Viability
  90. Balanced active crossover advice
  91. The Tube Center
  92. Help1 with a 3 channel 2a3 amplifier
  93. volume control hum/noise
  94. PS choke magnetic induction
  95. Circlotron power supply question
  96. Autoformer as choke?
  97. E182CC
  98. Fender Hotrod Deville 212
  99. Grundig Fine Arts OTL Amplifier
  100. Damper diodes, 6ax4 and or 6w4?
  101. Knight 333 / Pioneer SX 34B info needed.
  102. Gargantuan Linestage Output Capacitors
  103. Quad II Restoration
  104. Help identifying a tube.
  105. Tube filaments in series?
  106. Design of Resonant Input Choke PSU
  107. Dissimilar triode
  108. How important is the quality of a triode used as a cathode follower
  109. EL34B tubes
  110. Why not so common to split dual triodes between channels?
  111. In search of power supply schematic for phono preamp
  112. General Electric vs Toshiba 6L6's
  113. Audio Research Dual 75 Capacitor Source?
  114. Choosing A Cathode bypass capacitor
  115. 12AU7 SRPP buffer suggestions
  116. Pentode/triode switch question
  117. Lundahll 1669A Secondary voltage???
  118. Substituting tube rectifiers by silicon
  119. newbie question: is the connection to the output xformer somewhat odd?
  120. All quiet on the SN front - about darned time!
  121. Estimating power output
  122. Looking for KT88 Amplifier Schematic by Mikael Abdellah
  123. Comments on passive pre and cables
  124. curvecaptor
  125. 6b4g pushpull build!newbie
  126. Need help; I have "dog leg" shaped waveform on my amp
  127. Output Transformer Question?
  128. Urgent OT HELP needed ASAP please
  129. Questions on Triode Strapping
  130. Morgan Jones BALANCED?
  131. What are your RFI precautions?
  132. Pentodes without cathodes?
  133. help me
  134. Good quality 6600 CT OT
  135. Local Hamfest score!!!
  136. Unknown Transformer
  137. S5 11g help
  138. 6SN7 pre-amp
  139. These tube can be use for amplifier
  140. Any pitfalls to choke derived CT?
  141. Audio Research D76A bias adjustment
  142. I meet Mr. Morgan Jones
  143. st70 electrolytic caps
  144. Thank you SY
  145. el84 1 channel stopped working help
  146. Help! Weak Bass!
  147. never say never - 300B amps...
  148. 6aq5 Screen resistor?
  149. L. Tatro farm radios from 1930's.
  150. Published/DIY ultra-low THD designs?
  151. EL84 SE auto bias
  152. Kofi Annan in: "Oscillatin' in the Bevois Valley'"
  153. Subwoofer connections
  154. 6/30L2 - What to do with them ?
  155. PIONEER SA-810 Tube Amp Schematics
  156. EF86 Gm
  157. EL84/6BQ5 Ultra-Linear Push-Pull Recomendation
  158. Aria 6P14 makeover.
  159. switch for paralelled tube
  160. Curvecaptor with pentodes??
  161. Ground point for HF decoupling cap?
  162. Cancelling Harmonics
  163. Quiet Tube
  164. LM385 Adjustable voltage ref. diode as LED bias?
  165. Tubed Expression Pedal
  166. Any spice models around for AA5-esque battery tubes?
  167. Where to connect shielding
  168. Bogen K15 convert to guitar amp
  169. Help 805 As that the friend makes to straighten even gallbladder machine
  170. studiogear of the beatles
  171. 6AK5 Triode Curves
  172. twisted pair signal, source selector and ground buss???
  173. Tiny Amplifiers
  174. A newly aquired Hum
  175. many jan tubes
  176. is this the correct way of adding a volume control?
  177. Basic DIY Valve Phono Stage
  178. 5879 Experience?
  179. personal jobs
  180. Wanted Triode strapped curves for pentode of ECL82.
  181. source selector / volume hum in Aikido
  182. DHTs and Cathode Bias
  183. Best SET driver stage with lots of B+?
  184. Tube Library Pspice error
  185. referencing DC heater to B+
  186. Double floating Circlotron
  187. Supply Capacitors ?
  188. Sakuma style Tango project
  189. MC10L is good or not
  190. Eico HF-20 & Claus Byrith PS voltage & power draw
  191. Voltage Regulator Tubes
  192. EL34 triode-connected grounding-grid curves?
  193. Pls help me understand AR SP6 circuit
  194. good begginer project (ax84 v.s. boozhound)
  195. I'm looking for 417a/5842 Preamp Schematic without any Transformer, any suggestion ?
  196. Trouble in a new DIY amp.
  197. Suitable Transformers
  198. PT winding calculations HELP
  199. How to measure frequency response with a PC?
  200. Pspice Tube Generation Software
  201. Tektron tube amplifier Italy made
  202. What to do with 2x Stancor A3830?
  203. REQ: Schematics and tweaking tips
  204. Jadis Da 60 & 80
  205. 6L6 for a beginner, plus ECL86/6GW8
  206. Leak Stereo 20 clone? possibly with 6V6?
  207. Any comment on Vacuum State dpa300b??
  208. Radiotron Designers Handbook
  209. Kofi Annan in: "Buggin' the 'S' Outta Me!"
  210. 12B4 eqivalent : sonics-wise ?
  211. Any Eimac Scematics?
  212. What's a 6SL7 Good For?
  213. Where Can Buy 6c41
  214. would twisted pair from a network cable be suitable as hook-up wires inside an amp?
  215. use a 45 to drive a 45 ?
  216. Regulated heater reference
  217. Heater Elevation, how high?
  218. 6201 alternative
  219. 4V Tentlabs filament supply
  220. Difference between stereo & 2 monoblocks
  221. Parallel operation of triodes.
  222. input tubes using 6922?
  223. Looking for choices - affordable PP OPTs
  224. removing HF damping pF caps for guitar
  225. HH Scott Transformer #s
  226. Tips for rebuilding this amp?
  227. Need advice - what can I build with this power transformer?
  228. Source for high voltage electro caps
  229. differences between K-12M and K-12G kits?
  230. 12B4 Line Stage with Fixed Bias?
  231. split push-pull output stage
  232. any thoughts/explanation on the power supply for this circuit?
  233. Where to begin on a PP?
  234. ProAc Tablette 50 Speakers
  235. Recognizing wiped out ECC's 81,82,83
  236. So tell me.... how did YOU get into tubes??
  237. 7189 or 7819 el84 tube?
  238. Question about Star Grounding
  239. Employment offered; breadboarding a Tube Monoblock
  240. Need help: Looking for ECF80 preamp schematic
  241. a 5AR4 after a diode bridge? what is the purpose?
  242. 807 & Pe 06/40n
  243. Board layout design
  244. 12AX7, 12AU7 Substitution
  245. 200,000 Tubes for sale in Michigan
  246. Ground scheme
  247. Help on 6L6GC Triode PP..working points..
  248. A neat trick?
  249. Setup & Implementation of G Pimm's Self-Bias CCS
  250. Tube Preamp FM interference

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