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  1. Preamp PSU Design Help
  2. GZ37 Substitution?
  3. help disigning 12AY7 based mic pre
  4. I m confuse ! expert help
  5. Removing a pot.
  6. diyparadiso kits?
  7. Help with linestage power supply
  8. TX103 - RJM 6DJ8 - TX102 preamp
  9. Replace the field coil spk with Electromagnetic dynamic spk
  10. Gu50 output problems
  11. SRPP: adifferent perspective
  12. Fixed or self bias?
  13. 211 amp PSU question
  14. Help! transformer overheating!
  15. more ebay stuff
  16. 6KG6, output stage & PSpice
  17. 6C33C-B Failure Mode?
  18. manley 300b preamp schematic required
  19. 115 V transformer on 230 V ???
  20. Hoffman Amps Turret Lugs?
  21. 300B Reliablity
  22. Metal work in Toronto
  23. What happens when you starve a heater?
  24. se 6c33c or se el34 schematic
  25. AVO MkIV User Guide
  26. Altec A150C and 531B psu
  27. What's been broken?
  28. tubes here...
  29. Voltage drop AZ1 = AZ11 = RGN1064 rectifier tube
  30. The Beast...
  31. Looking for Mikael's KT88 Schematic
  32. 1.2k vs 2.5k TC on a 6550 amp?
  33. Ultimate Tube head phone amp.
  34. Selecting Output Transformers for My WOT Line Preamp
  35. Tube microphone
  36. OP tube convertible PP amps?
  37. The "Valvolozzo" - SE amp with torroids
  38. Phase Splitters
  39. A new setup, advice wanted
  40. 6e2 Magic eye datasheet
  41. Another linestage......
  42. VT52: are the triode and pentode alike?
  43. Long term planning
  44. vintage restoration
  45. Some doubt about my first Tube amp (Heater).
  46. Power supply for Single Ended Amplifier
  47. Another CD player DAC tube modification
  48. philips el6400 tubeamp
  49. NTE Metal Film Resistors?
  50. How much power do I really need?
  51. hey guitar playas, try this one!
  52. 6H30 phono with passive RIAA
  53. I need help troubleshooting a EL84 push pull amp.
  54. Tube Data needed please
  55. Filament Transformer
  56. strange tube
  57. 12AX7 and 12AT7 numerical data
  58. DC/DC converter to power tube amp?
  59. Basic Cathode Follower buffer
  60. Marshall EL84 20/20 schematic needed
  61. Help me!!! I need schematic of Pow-Amp using 6V6
  62. gi30, se pentode?
  63. Any experience with Chinese 6N8P
  64. Source for common mode chokes
  65. Low Power FM stereo transmitter?
  66. Rh807
  67. Replacing a power tube (used as driver for mosfet car amp)...how to bias?
  68. Question about sub out on amp
  69. opt question
  70. Tube socket wanted. (help where)
  71. voltage regulator using ECL84 + OB2
  72. Help! 6sn7GT
  73. tubes n needles
  74. PSpice/LTSpice model for 6AU6/EF94?
  75. 5AR4/GZ34 GT Britain
  76. CCS vs mu-follower. What's the difference?
  77. Need advice on two preamp kits.
  78. My First Tube Amplifier
  79. Output (beam) pentodes / tetrodes suitable for screen grid drive
  80. Patent applications of interest
  81. Rca
  82. Guitar Amps
  83. Melos GK-1 Tube Pre-amp Schematic needed ...
  84. 6L6s and 6AR6s - what can I do with them?
  85. Line stage preamp, based on SY's "Heretical Unity gain line stage"
  86. 1600v HT supply for scope.
  87. Mc 275 CE schema
  88. Help! is this work?
  89. Some questons on a DIY system.
  90. pinout on 6GT5A tube
  91. 50Hz hum after increasing grid stopper
  92. A Heretical Unity Gain Line Stage part II
  93. 832A Push Pull 5W
  94. PSpice/LTSpice model for 12AY7/6072 wanted
  95. Is this circuit I drew ok?
  96. Suggest a preamp for cd/tuner
  97. EL84 to 6l6
  98. Tube-cad, is it worth the $40?
  99. Grounded Grid Preamp Project And Possible Group PCB Buy
  100. Can anyone sujest a good operating point for the PL84
  101. Preamp hiss noise
  102. Audio Note Trans 205 specs?
  103. Help translating russian tube datasheet
  104. Very high output level!
  105. Help wanted with valve data
  106. Boiling sound...
  107. Negative Feedback Ground
  108. low power SE with 813
  109. KT instead EL
  110. a single double triode and two chanel?
  111. 76 driving 211?
  112. My Experience with "Music Angel" EL34 PP
  113. 12JT6 in triode mode curves needed
  114. Where did these EL84 numbers come from?
  115. int. low signal
  116. FFT analysis-Truth or Consequence
  117. 6sn7gtb Filament Voltage
  118. Help with Tube Buffer for passive pre
  119. Is there a 12CM7?
  120. 12ax7
  121. tube driving the same tube - whats the collective word?
  122. 6c33c PSE
  123. 75% of rated max. current too high?
  124. ST shaped tube
  125. Tube Phono Pre of RJM
  126. how to determine P1 from P2 of a Push-pull transformer?
  127. fisher x100a
  128. Please review EL84M PP design before I order parts.
  129. Auction Gem Motorola? Go Figure!
  130. Darling amp plate voltage
  131. Sound quality of 6C4C is same with 2A3?
  132. 6,3VAC to 6,3VDC
  133. EL84 push pull idea
  134. Marantz preamp clone for newbie?
  135. Can I use Philips TB2.5 /400 in a SE ampl.
  136. Microwave + Computer = Tube? [help!]
  137. Oil Capacitor DC vs. AC Voltage Rating
  138. Plate Choke Miller Capacitance
  139. Anyone interested in building an EAR 834P?
  140. tube pre-amp
  141. Choke For Supply B+ Diy
  142. Audio Note DAC4 SRPP output stage problems!
  143. Regulated Dc Question
  144. what about tubes?
  145. Please help choose amp layout.
  146. SE 813 OPT..Am I On the right Track?
  147. say it's a hum problem
  148. Affordable KT88
  149. With transformer or OTL ?
  150. 45 SE tube amp OPT
  151. 2 Bogen 7027 tube amp vintage amplifier mono block
  152. Newnewbie Ouput Tranny question
  153. Webcor Amplifier Speaker
  154. could 24A been power tube
  155. How's this for a first amp?
  156. U.K. transformer supplier
  157. stereo el34 + kt66?
  158. Very tempting Good invesment or not????????
  159. A Heretical Unity gain line stage
  160. NFB net gain or loss
  161. Different brands:Is there any difference?
  162. McIntosh 225 Schematic
  163. LM317 for power amp regulation?
  164. KT88 or 6550?
  165. How to choose 6c33b?
  166. Using rectifier tubes in parallell
  167. Small problem at power off
  168. Preamp rebuild - hum problem
  169. what should I do with this tranny???
  170. Will this 2A3 PSE work?
  171. Ec86
  172. Worth to buy - tubes?
  173. 10/10/ preamp
  174. what do you think of this preamp?
  175. Tube FM -- Armstrong's first bdcst commemorated
  176. rjm 6dj8 phono section
  177. mercury vapor rectifier tubes on e-bay
  178. Russian Tube Stuff -- WSJ
  179. Help Please!!!!!!
  180. 5902 amp schematics?
  181. Microphonics...........
  182. High voltage PSU
  183. 2A3 v 6550
  184. Coupling cap question
  185. Wollcott cross coupled circuit
  186. TAD Tubes where are they from?
  187. ebay Junk or Treasures?
  188. interconnects
  189. In few words
  190. GlassFET Design Ideas
  191. ecc88 tube pover supply-rect.
  192. A tubeNoob enters => I bought a Dynavox VR-70E
  193. plugging guitar amp to phono reciever
  194. Heater Supply using LM3X7 current source
  195. Stepdown input trafo
  196. increasing the bias will cause the amp to.....
  197. Transformer faulty?
  198. More crappy Russian EL34s - Svetlana this time
  199. My Tragic story about Emission Labs tube
  200. Please help me solve the problem
  201. amp freq response with o-scope
  202. Can you SEE (construction) how a tube SOUNDS?
  203. CCS fed shunt regulators
  204. Recommended Modifications/Tweaks for Dynaco PAS-3 Series II Pre-Amp
  205. ebay toys
  206. Source for 6c45pi's???
  207. phono preamp design for c3m postie valve
  208. McMartin MA-50 Troubleshooting
  209. looking for something different
  210. mc275
  211. Sv572-3 Se
  212. Alps step attenuator
  213. seeking real kt90 pp schematics
  214. -50V negative supply
  215. Inductance coupling between chokes
  216. Mercury Magnetics
  217. warming up thetubes
  218. distorsion
  219. using a plate choke?
  220. Should I trash these tubes
  221. Minature Vaccum Tube Question
  222. 46 tube user
  223. Smells like a mistake
  224. Help for my hybird zero feedback AMP
  225. help on ul transformer please
  226. Wiring the D3a as triode - What is best?
  227. Switching from ultralinear to triode
  228. Help for a Output Transfo problem
  229. Pentode models
  230. Good or bad to use parallel capacitors of same value in signal path...
  231. Urgent: Need Help on Schematics (Tube Pre-Amplifier)
  232. ASL wave 8 mods
  233. lectron jh 60 help----------------
  234. crown tube poweramp
  235. Alan kimmel mu stage article
  236. What would you do with this amp?
  237. tube software
  238. Simple Valve Preamplifier
  239. Current sourced heaters in a CF
  240. Tubes and music styles
  241. Cheap SE EL84
  242. Making a living out of tubes? (A little off-topic)
  243. EL84 matched pairs
  244. Tango XE20S voltage rating?
  245. power transformer heat
  246. Used Tube Amps, second life..
  247. Tubes
  248. Taylor 845
  249. AVO CT-160 Tube Tester - how to remove knobs?? - please help
  250. The DIYHifiSupply.com Joplin amplifier Kit

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