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  1. Long term planning
  2. vintage restoration
  3. Some doubt about my first Tube amp (Heater).
  4. Power supply for Single Ended Amplifier
  5. Another CD player DAC tube modification
  6. philips el6400 tubeamp
  7. How much power do I really need?
  8. 6H30 phono with passive RIAA
  9. I need help troubleshooting a EL84 push pull amp.
  10. Tube Data needed please
  11. Filament Transformer
  12. strange tube
  13. 12AX7 and 12AT7 numerical data
  14. DC/DC converter to power tube amp?
  15. Basic Cathode Follower buffer
  16. Help me!!! I need schematic of Pow-Amp using 6V6
  17. gi30, se pentode?
  18. Any experience with Chinese 6N8P
  19. Source for common mode chokes
  20. Low Power FM stereo transmitter?
  21. Rh807
  22. Replacing a power tube (used as driver for mosfet car amp)...how to bias?
  23. Question about sub out on amp
  24. opt question
  25. Tube socket wanted. (help where)
  26. voltage regulator using ECL84 + OB2
  27. Help! 6sn7GT
  28. tubes n needles
  29. PSpice/LTSpice model for 6AU6/EF94?
  30. 5AR4/GZ34 GT Britain
  31. CCS vs mu-follower. What's the difference?
  32. Need advice on two preamp kits.
  33. My First Tube Amplifier
  34. Output (beam) pentodes / tetrodes suitable for screen grid drive
  35. Patent applications of interest
  36. Rca
  37. Melos GK-1 Tube Pre-amp Schematic needed ...
  38. 6L6s and 6AR6s - what can I do with them?
  39. Line stage preamp, based on SY's "Heretical Unity gain line stage"
  40. 1600v HT supply for scope.
  41. Mc 275 CE schema
  42. Help! is this work?
  43. Some questons on a DIY system.
  44. pinout on 6GT5A tube
  45. 50Hz hum after increasing grid stopper
  46. A Heretical Unity Gain Line Stage part II
  47. 832A Push Pull 5W
  48. PSpice/LTSpice model for 12AY7/6072 wanted
  49. Is this circuit I drew ok?
  50. Suggest a preamp for cd/tuner
  51. EL84 to 6l6
  52. Tube-cad, is it worth the $40?
  53. Grounded Grid Preamp Project And Possible Group PCB Buy
  54. Can anyone sujest a good operating point for the PL84
  55. Preamp hiss noise
  56. Audio Note Trans 205 specs?
  57. Help translating russian tube datasheet
  58. Very high output level!
  59. Help wanted with valve data
  60. Boiling sound...
  61. Negative Feedback Ground
  62. low power SE with 813
  63. KT instead EL
  64. a single double triode and two chanel?
  65. 76 driving 211?
  66. My Experience with "Music Angel" EL34 PP
  67. 12JT6 in triode mode curves needed
  68. Where did these EL84 numbers come from?
  69. int. low signal
  70. FFT analysis-Truth or Consequence
  71. 6sn7gtb Filament Voltage
  72. Help with Tube Buffer for passive pre
  73. Is there a 12CM7?
  74. 12ax7
  75. tube driving the same tube - whats the collective word?
  76. 6c33c PSE
  77. 75% of rated max. current too high?
  78. ST shaped tube
  79. Tube Phono Pre of RJM
  80. how to determine P1 from P2 of a Push-pull transformer?
  81. fisher x100a
  82. Please review EL84M PP design before I order parts.
  83. Auction Gem Motorola? Go Figure!
  84. Darling amp plate voltage
  85. Sound quality of 6C4C is same with 2A3?
  86. 6,3VAC to 6,3VDC
  87. EL84 push pull idea
  88. Marantz preamp clone for newbie?
  89. Can I use Philips TB2.5 /400 in a SE ampl.
  90. Microwave + Computer = Tube? [help!]
  91. Plate Choke Miller Capacitance
  92. Anyone interested in building an EAR 834P?
  93. tube pre-amp
  94. Choke For Supply B+ Diy
  95. Audio Note DAC4 SRPP output stage problems!
  96. Regulated Dc Question
  97. what about tubes?
  98. Please help choose amp layout.
  99. SE 813 OPT..Am I On the right Track?
  100. say it's a hum problem
  101. Affordable KT88
  102. With transformer or OTL ?
  103. 45 SE tube amp OPT
  104. 2 Bogen 7027 tube amp vintage amplifier mono block
  105. Newnewbie Ouput Tranny question
  106. Webcor Amplifier Speaker
  107. could 24A been power tube
  108. How's this for a first amp?
  109. U.K. transformer supplier
  110. stereo el34 + kt66?
  111. Very tempting Good invesment or not????????
  112. A Heretical Unity gain line stage
  113. NFB net gain or loss
  114. Different brands:Is there any difference?
  115. McIntosh 225 Schematic
  116. LM317 for power amp regulation?
  117. KT88 or 6550?
  118. How to choose 6c33b?
  119. Using rectifier tubes in parallell
  120. Small problem at power off
  121. Preamp rebuild - hum problem
  122. what should I do with this tranny???
  123. Will this 2A3 PSE work?
  124. Ec86
  125. Worth to buy - tubes?
  126. 10/10/ preamp
  127. what do you think of this preamp?
  128. Tube FM -- Armstrong's first bdcst commemorated
  129. rjm 6dj8 phono section
  130. mercury vapor rectifier tubes on e-bay
  131. Russian Tube Stuff -- WSJ
  132. Help Please!!!!!!
  133. 5902 amp schematics?
  134. Microphonics...........
  135. High voltage PSU
  136. 2A3 v 6550
  137. Coupling cap question
  138. Wollcott cross coupled circuit
  139. TAD Tubes where are they from?
  140. ebay Junk or Treasures?
  141. interconnects
  142. In few words
  143. GlassFET Design Ideas
  144. ecc88 tube pover supply-rect.
  145. A tubeNoob enters => I bought a Dynavox VR-70E
  146. Heater Supply using LM3X7 current source
  147. Stepdown input trafo
  148. increasing the bias will cause the amp to.....
  149. Transformer faulty?
  150. More crappy Russian EL34s - Svetlana this time
  151. My Tragic story about Emission Labs tube
  152. Please help me solve the problem
  153. amp freq response with o-scope
  154. Can you SEE (construction) how a tube SOUNDS?
  155. CCS fed shunt regulators
  156. Recommended Modifications/Tweaks for Dynaco PAS-3 Series II Pre-Amp
  157. ebay toys
  158. Source for 6c45pi's???
  159. phono preamp design for c3m postie valve
  160. McMartin MA-50 Troubleshooting
  161. looking for something different
  162. mc275
  163. Sv572-3 Se
  164. Alps step attenuator
  165. seeking real kt90 pp schematics
  166. -50V negative supply
  167. Inductance coupling between chokes
  168. Mercury Magnetics
  169. warming up thetubes
  170. distorsion
  171. using a plate choke?
  172. Should I trash these tubes
  173. Minature Vaccum Tube Question
  174. 46 tube user
  175. Smells like a mistake
  176. Help for my hybird zero feedback AMP
  177. help on ul transformer please
  178. Wiring the D3a as triode - What is best?
  179. Switching from ultralinear to triode
  180. Help for a Output Transfo problem
  181. Pentode models
  182. Good or bad to use parallel capacitors of same value in signal path...
  183. Urgent: Need Help on Schematics (Tube Pre-Amplifier)
  184. ASL wave 8 mods
  185. lectron jh 60 help----------------
  186. crown tube poweramp
  187. Alan kimmel mu stage article
  188. What would you do with this amp?
  189. tube software
  190. Simple Valve Preamplifier
  191. Current sourced heaters in a CF
  192. Tubes and music styles
  193. Cheap SE EL84
  194. Making a living out of tubes? (A little off-topic)
  195. EL84 matched pairs
  196. Tango XE20S voltage rating?
  197. power transformer heat
  198. Used Tube Amps, second life..
  199. Tubes
  200. Taylor 845
  201. AVO CT-160 Tube Tester - how to remove knobs?? - please help
  202. The DIYHifiSupply.com Joplin amplifier Kit
  203. Berning P-1 Preamp
  204. Which tube for OPT 7,5k SE low watts???
  205. help me with this puzzle...
  206. It makes me wonder ...
  207. Tubes operating in horizontal position
  208. Dewald radio N-803b keep or use parts?
  209. Ongaku
  210. PSU Design question
  211. Primary reactance of a parafeed OPT
  212. Info on IIT interstage trafos?
  213. vt25/10-Y or 45 tube
  214. 2a3, single plate-double plate?
  215. Preferred tube? KT88 vs. EL34
  216. You may laugh..but don't waste your time trying to dissuade me. 300B preamp.
  217. Parallelling power supply chokes???
  218. Sherwood S7000
  219. please explain plate curves
  220. Triode connected SV6550C with 500V HT
  221. KT88 SE schematic wanted.
  222. 6SN7 based tube buffer
  223. hum measurement
  224. Load of tubes to liquidate
  225. Unhappy with the Lilliput design
  226. Halving OPT's pri.imp. by connecting 8ohm load to 16ohm tap - Good/Bad?
  227. Tube Technology Prophet
  228. Cathode Feedback from Secondary for PP Amp
  229. Zenith Amplifier
  230. Dynaco SCA-35 fixer-upper
  231. Multiple primary power transformer question
  232. Sizing a Regulator
  233. will laziness burn my amp down?!
  234. resistors of a lower power rating
  235. wavy vibrato-like sound when amp cranked
  236. Rh34se?
  237. Ef86, 6n1p & 845pp
  238. HYBRID POWER AMPLIFIER - please help!
  239. 6528 Se
  240. single ended HiFi Regal stereo tube amplifier
  241. Matisse Line Amp
  242. changing longtail
  243. What do you think??????
  244. The amplifier itself whines
  245. DIY repair- replacing capacitors
  246. Benefits of 845B
  247. Counterpoint Preamp Modifications
  248. Humming Sovtek EF86
  249. Output Transformers
  250. RIAA phono stage

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