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  1. Pre-Amp
  2. submini tube preamp is a success
  3. Roll off frequency.
  4. Materials Technology for Electron Tubes by Walter H. Kohl
  5. Grundig TK 46 manual
  6. I'm anti-expensive audio parts but man, a good capacitor can make a difference
  7. How to determine a tube is shorted?
  8. Power supply problem
  9. SS power trans for tube experiments
  10. how to set output current on G Pimm's CCS circuit?
  11. Tube testing questions
  12. Push Pull Output Transformer wiring problem
  13. shunt regulator using VR tubes (with ccs like g pimm) and circuit load
  14. Stepped attenuators vs. Carbon pots
  15. hum/buzz with pot all the way up
  16. Cap and resistor types in guitar tube amp
  17. VacuTrace ... In Chicago?
  18. Lifesaver question on earthing
  19. Affordable, but good attenuators?
  20. Gu50 Set ?
  21. mounting an EL34 upside-down
  22. Direct coupled PP 2a3 amp - maths needed!!
  23. My 1st scratch build complete......
  24. Very Basic EL84 or EL34 DIY Amp
  25. Curcio Daniel Preamp Mods?
  26. Tube designs: 45 driving 45/2a3/300b?
  27. Adding secondary of output transformer into cathodes of output stage ? Eico ST-70
  28. Marantz 8 B : Output Transformer
  29. has anyone used a fan on their project?
  30. Audio Research SP12 heater arrangement
  31. tv damper diodes
  32. volume pot quite close to a tube - is this okay?
  33. UTC s42 special series
  34. 6H30P preamp schematics
  35. Digital potentiometer corrupt tube amps
  36. Alternative filament supply for 01A line stage
  37. Lamination Size
  38. Yaqin MC10L and KT88
  39. Help me read tube data sheets
  40. Quick Question (Driving 6L6GC's)
  41. Cause for concern -- scorch mark in tube
  42. why not 10k pot
  43. Dynaco Stereo 70 Output Transformer
  44. 6CJ3 rectifier or 6D22S rectifier
  45. Back-to-Back trannies
  46. Spring Reverb transformer
  47. Hamfest in Toronto area next weekend
  48. st70 bass response
  49. Triode "Champ" transformer v Edcor
  50. Low vs High aka Series vs Parallel Filaments
  51. Bogen monster MO200A schematic
  52. The Great Tempe Audio Shootout
  53. opinions on this p-p kt88
  54. Any XLR Tube Buffer Plans?
  55. Mystery transformers
  56. I need help with my next project
  57. A thought on Cathode feedback
  58. EL34 SE, direct coupled
  59. Ccs
  60. Hybrid amp: ECH83 + TDA2030A
  61. Leaving tube preamp always powered on.
  62. Variable 6922 heater to cathode voltage limit...?
  63. Is this risky?
  64. What to do with some WE tubes and others
  65. 6B4G SRPP
  66. pentode in triode mode SE vs a DHT SE like 2a3/300b
  67. dynakit decware bottlehead ... which to pick
  68. 6JC6 triode strapped?
  69. Searching for Raw Turrets
  70. Help.. EZ81 power supply diagram
  71. Ear 8l6
  72. Bogen H-30 guitar mod
  73. Voltage measurements from a blown 5AR4 vs. good 5Y3
  74. Sanity check on a 2A3 ultrapath with Pentode driver
  75. Star ground with dissimilar metals: concern?
  76. 5AR4 marked as 5V4GA?
  77. Calculating cathode bypass cap.
  78. Please need help! TUBE BIAS PROBE
  79. Aikido Phono Stage
  80. Using an El84 as a driver
  81. Transfromer value of this 300B circuit
  82. Chassis Layout & PS questions
  83. help needed for 1st DIY tube amp - Sakuma 845 SE
  84. Ideas for 4v filament triodes/pentodes
  85. Comments on Power Amp Viability
  86. Balanced active crossover advice
  87. The Tube Center
  88. Help1 with a 3 channel 2a3 amplifier
  89. volume control hum/noise
  90. PS choke magnetic induction
  91. Circlotron power supply question
  92. Autoformer as choke?
  93. E182CC
  94. Fender Hotrod Deville 212
  95. Grundig Fine Arts OTL Amplifier
  96. Damper diodes, 6ax4 and or 6w4?
  97. Knight 333 / Pioneer SX 34B info needed.
  98. Gargantuan Linestage Output Capacitors
  99. Quad II Restoration
  100. Help identifying a tube.
  101. Tube filaments in series?
  102. Design of Resonant Input Choke PSU
  103. Dissimilar triode
  104. How important is the quality of a triode used as a cathode follower
  105. EL34B tubes
  106. Why not so common to split dual triodes between channels?
  107. In search of power supply schematic for phono preamp
  108. General Electric vs Toshiba 6L6's
  109. Audio Research Dual 75 Capacitor Source?
  110. Choosing A Cathode bypass capacitor
  111. 12AU7 SRPP buffer suggestions
  112. Pentode/triode switch question
  113. Lundahll 1669A Secondary voltage???
  114. Substituting tube rectifiers by silicon
  115. newbie question: is the connection to the output xformer somewhat odd?
  116. All quiet on the SN front - about darned time!
  117. Estimating power output
  118. Looking for KT88 Amplifier Schematic by Mikael Abdellah
  119. Comments on passive pre and cables
  120. curvecaptor
  121. 6b4g pushpull build!newbie
  122. Need help; I have "dog leg" shaped waveform on my amp
  123. Output Transformer Question?
  124. Urgent OT HELP needed ASAP please
  125. Questions on Triode Strapping
  126. Morgan Jones BALANCED?
  127. What are your RFI precautions?
  128. Pentodes without cathodes?
  129. help me
  130. Good quality 6600 CT OT
  131. Local Hamfest score!!!
  132. Unknown Transformer
  133. S5 11g help
  134. 6SN7 pre-amp
  135. These tube can be use for amplifier
  136. Any pitfalls to choke derived CT?
  137. Audio Research D76A bias adjustment
  138. I meet Mr. Morgan Jones
  139. st70 electrolytic caps
  140. Thank you SY
  141. el84 1 channel stopped working help
  142. Help! Weak Bass!
  143. never say never - 300B amps...
  144. 6aq5 Screen resistor?
  145. L. Tatro farm radios from 1930's.
  146. Published/DIY ultra-low THD designs?
  147. EL84 SE auto bias
  148. Kofi Annan in: "Oscillatin' in the Bevois Valley'"
  149. Subwoofer connections
  150. 6/30L2 - What to do with them ?
  151. PIONEER SA-810 Tube Amp Schematics
  152. EF86 Gm
  153. EL84/6BQ5 Ultra-Linear Push-Pull Recomendation
  154. Aria 6P14 makeover.
  155. switch for paralelled tube
  156. Curvecaptor with pentodes??
  157. Ground point for HF decoupling cap?
  158. Cancelling Harmonics
  159. Quiet Tube
  160. LM385 Adjustable voltage ref. diode as LED bias?
  161. Tubed Expression Pedal
  162. Any spice models around for AA5-esque battery tubes?
  163. Where to connect shielding
  164. Bogen K15 convert to guitar amp
  165. Help 805 As that the friend makes to straighten even gallbladder machine
  166. studiogear of the beatles
  167. 6AK5 Triode Curves
  168. twisted pair signal, source selector and ground buss???
  169. Tiny Amplifiers
  170. A newly aquired Hum
  171. many jan tubes
  172. is this the correct way of adding a volume control?
  173. Basic DIY Valve Phono Stage
  174. 5879 Experience?
  175. personal jobs
  176. Wanted Triode strapped curves for pentode of ECL82.
  177. source selector / volume hum in Aikido
  178. DHTs and Cathode Bias
  179. Best SET driver stage with lots of B+?
  180. Tube Library Pspice error
  181. referencing DC heater to B+
  182. Double floating Circlotron
  183. Supply Capacitors ?
  184. Sakuma style Tango project
  185. MC10L is good or not
  186. Eico HF-20 & Claus Byrith PS voltage & power draw
  187. Voltage Regulator Tubes
  188. EL34 triode-connected grounding-grid curves?
  189. Pls help me understand AR SP6 circuit
  190. good begginer project (ax84 v.s. boozhound)
  191. I'm looking for 417a/5842 Preamp Schematic without any Transformer, any suggestion ?
  192. Trouble in a new DIY amp.
  193. Suitable Transformers
  194. PT winding calculations HELP
  195. How to measure frequency response with a PC?
  196. Pspice Tube Generation Software
  197. Tektron tube amplifier Italy made
  198. What to do with 2x Stancor A3830?
  199. REQ: Schematics and tweaking tips
  200. Jadis Da 60 & 80
  201. 6L6 for a beginner, plus ECL86/6GW8
  202. Leak Stereo 20 clone? possibly with 6V6?
  203. Any comment on Vacuum State dpa300b??
  204. Radiotron Designers Handbook
  205. Kofi Annan in: "Buggin' the 'S' Outta Me!"
  206. 12B4 eqivalent : sonics-wise ?
  207. Any Eimac Scematics?
  208. What's a 6SL7 Good For?
  209. Where Can Buy 6c41
  210. would twisted pair from a network cable be suitable as hook-up wires inside an amp?
  211. use a 45 to drive a 45 ?
  212. Regulated heater reference
  213. Heater Elevation, how high?
  214. 6201 alternative
  215. 4V Tentlabs filament supply
  216. Difference between stereo & 2 monoblocks
  217. Parallel operation of triodes.
  218. input tubes using 6922?
  219. Looking for choices - affordable PP OPTs
  220. removing HF damping pF caps for guitar
  221. HH Scott Transformer #s
  222. Tips for rebuilding this amp?
  223. Need advice - what can I build with this power transformer?
  224. Source for high voltage electro caps
  225. differences between K-12M and K-12G kits?
  226. 12B4 Line Stage with Fixed Bias?
  227. split push-pull output stage
  228. any thoughts/explanation on the power supply for this circuit?
  229. Where to begin on a PP?
  230. ProAc Tablette 50 Speakers
  231. Recognizing wiped out ECC's 81,82,83
  232. So tell me.... how did YOU get into tubes??
  233. 7189 or 7819 el84 tube?
  234. Question about Star Grounding
  235. Employment offered; breadboarding a Tube Monoblock
  236. Need help: Looking for ECF80 preamp schematic
  237. a 5AR4 after a diode bridge? what is the purpose?
  238. 807 & Pe 06/40n
  239. Board layout design
  240. 12AX7, 12AU7 Substitution
  241. 200,000 Tubes for sale in Michigan
  242. Ground scheme
  243. Help on 6L6GC Triode PP..working points..
  244. A neat trick?
  245. Setup & Implementation of G Pimm's Self-Bias CCS
  246. Tube Preamp FM interference
  247. Parafeed 6EM7 with 2k load?
  248. Need Help on HEATHKIT W-5M Power Transformer
  249. Fully isolated oilbath transformer.
  250. small signal DHT or DHP like AVVT20/8?

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