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  1. TX103 - RJM 6DJ8 - TX102 preamp
  2. Replace the field coil spk with Electromagnetic dynamic spk
  3. Gu50 output problems
  4. SRPP: adifferent perspective
  5. Fixed or self bias?
  6. 211 amp PSU question
  7. Help! transformer overheating!
  8. more ebay stuff
  9. 6KG6, output stage & PSpice
  10. 6C33C-B Failure Mode?
  11. manley 300b preamp schematic required
  12. 115 V transformer on 230 V ???
  13. Hoffman Amps Turret Lugs?
  14. 300B Reliablity
  15. Metal work in Toronto
  16. What happens when you starve a heater?
  17. se 6c33c or se el34 schematic
  18. AVO MkIV User Guide
  19. Altec A150C and 531B psu
  20. What's been broken?
  21. tubes here...
  22. Voltage drop AZ1 = AZ11 = RGN1064 rectifier tube
  23. The Beast...
  24. Looking for Mikael's KT88 Schematic
  25. 1.2k vs 2.5k TC on a 6550 amp?
  26. Ultimate Tube head phone amp.
  27. Selecting Output Transformers for My WOT Line Preamp
  28. Tube microphone
  29. OP tube convertible PP amps?
  30. The "Valvolozzo" - SE amp with torroids
  31. Phase Splitters
  32. A new setup, advice wanted
  33. 6e2 Magic eye datasheet
  34. Another linestage......
  35. VT52: are the triode and pentode alike?
  36. Long term planning
  37. vintage restoration
  38. Some doubt about my first Tube amp (Heater).
  39. Power supply for Single Ended Amplifier
  40. Another CD player DAC tube modification
  41. philips el6400 tubeamp
  42. NTE Metal Film Resistors?
  43. How much power do I really need?
  44. hey guitar playas, try this one!
  45. 6H30 phono with passive RIAA
  46. I need help troubleshooting a EL84 push pull amp.
  47. Tube Data needed please
  48. Filament Transformer
  49. strange tube
  50. 12AX7 and 12AT7 numerical data
  51. DC/DC converter to power tube amp?
  52. Basic Cathode Follower buffer
  53. Marshall EL84 20/20 schematic needed
  54. Help me!!! I need schematic of Pow-Amp using 6V6
  55. gi30, se pentode?
  56. Any experience with Chinese 6N8P
  57. Source for common mode chokes
  58. Low Power FM stereo transmitter?
  59. Rh807
  60. Replacing a power tube (used as driver for mosfet car amp)...how to bias?
  61. Question about sub out on amp
  62. opt question
  63. Tube socket wanted. (help where)
  64. voltage regulator using ECL84 + OB2
  65. Help! 6sn7GT
  66. tubes n needles
  67. PSpice/LTSpice model for 6AU6/EF94?
  68. 5AR4/GZ34 GT Britain
  69. CCS vs mu-follower. What's the difference?
  70. Need advice on two preamp kits.
  71. My First Tube Amplifier
  72. Output (beam) pentodes / tetrodes suitable for screen grid drive
  73. Patent applications of interest
  74. Rca
  75. Guitar Amps
  76. Melos GK-1 Tube Pre-amp Schematic needed ...
  77. 6L6s and 6AR6s - what can I do with them?
  78. Line stage preamp, based on SY's "Heretical Unity gain line stage"
  79. 1600v HT supply for scope.
  80. Mc 275 CE schema
  81. Help! is this work?
  82. Some questons on a DIY system.
  83. pinout on 6GT5A tube
  84. 50Hz hum after increasing grid stopper
  85. A Heretical Unity Gain Line Stage part II
  86. 832A Push Pull 5W
  87. PSpice/LTSpice model for 12AY7/6072 wanted
  88. Is this circuit I drew ok?
  89. Suggest a preamp for cd/tuner
  90. EL84 to 6l6
  91. Tube-cad, is it worth the $40?
  92. Grounded Grid Preamp Project And Possible Group PCB Buy
  93. Can anyone sujest a good operating point for the PL84
  94. Preamp hiss noise
  95. Audio Note Trans 205 specs?
  96. Help translating russian tube datasheet
  97. Very high output level!
  98. Help wanted with valve data
  99. Boiling sound...
  100. Negative Feedback Ground
  101. low power SE with 813
  102. KT instead EL
  103. a single double triode and two chanel?
  104. 76 driving 211?
  105. My Experience with "Music Angel" EL34 PP
  106. 12JT6 in triode mode curves needed
  107. Where did these EL84 numbers come from?
  108. int. low signal
  109. FFT analysis-Truth or Consequence
  110. 6sn7gtb Filament Voltage
  111. Help with Tube Buffer for passive pre
  112. Is there a 12CM7?
  113. 12ax7
  114. tube driving the same tube - whats the collective word?
  115. 6c33c PSE
  116. 75% of rated max. current too high?
  117. ST shaped tube
  118. Tube Phono Pre of RJM
  119. how to determine P1 from P2 of a Push-pull transformer?
  120. fisher x100a
  121. Please review EL84M PP design before I order parts.
  122. Auction Gem Motorola? Go Figure!
  123. Darling amp plate voltage
  124. Sound quality of 6C4C is same with 2A3?
  125. 6,3VAC to 6,3VDC
  126. EL84 push pull idea
  127. Marantz preamp clone for newbie?
  128. Can I use Philips TB2.5 /400 in a SE ampl.
  129. Microwave + Computer = Tube? [help!]
  130. Oil Capacitor DC vs. AC Voltage Rating
  131. Plate Choke Miller Capacitance
  132. Anyone interested in building an EAR 834P?
  133. tube pre-amp
  134. Choke For Supply B+ Diy
  135. Audio Note DAC4 SRPP output stage problems!
  136. Regulated Dc Question
  137. what about tubes?
  138. Please help choose amp layout.
  139. SE 813 OPT..Am I On the right Track?
  140. say it's a hum problem
  141. Affordable KT88
  142. With transformer or OTL ?
  143. 45 SE tube amp OPT
  144. 2 Bogen 7027 tube amp vintage amplifier mono block
  145. Newnewbie Ouput Tranny question
  146. Webcor Amplifier Speaker
  147. could 24A been power tube
  148. How's this for a first amp?
  149. U.K. transformer supplier
  150. stereo el34 + kt66?
  151. Very tempting Good invesment or not????????
  152. A Heretical Unity gain line stage
  153. NFB net gain or loss
  154. Different brands:Is there any difference?
  155. McIntosh 225 Schematic
  156. LM317 for power amp regulation?
  157. KT88 or 6550?
  158. How to choose 6c33b?
  159. Using rectifier tubes in parallell
  160. Small problem at power off
  161. Preamp rebuild - hum problem
  162. what should I do with this tranny???
  163. Will this 2A3 PSE work?
  164. Ec86
  165. Worth to buy - tubes?
  166. 10/10/ preamp
  167. what do you think of this preamp?
  168. Tube FM -- Armstrong's first bdcst commemorated
  169. rjm 6dj8 phono section
  170. mercury vapor rectifier tubes on e-bay
  171. Russian Tube Stuff -- WSJ
  172. Help Please!!!!!!
  173. 5902 amp schematics?
  174. Microphonics...........
  175. High voltage PSU
  176. 2A3 v 6550
  177. Coupling cap question
  178. Wollcott cross coupled circuit
  179. TAD Tubes where are they from?
  180. ebay Junk or Treasures?
  181. interconnects
  182. In few words
  183. GlassFET Design Ideas
  184. ecc88 tube pover supply-rect.
  185. A tubeNoob enters => I bought a Dynavox VR-70E
  186. plugging guitar amp to phono reciever
  187. Heater Supply using LM3X7 current source
  188. Stepdown input trafo
  189. increasing the bias will cause the amp to.....
  190. Transformer faulty?
  191. More crappy Russian EL34s - Svetlana this time
  192. My Tragic story about Emission Labs tube
  193. Please help me solve the problem
  194. amp freq response with o-scope
  195. Can you SEE (construction) how a tube SOUNDS?
  196. CCS fed shunt regulators
  197. Recommended Modifications/Tweaks for Dynaco PAS-3 Series II Pre-Amp
  198. ebay toys
  199. Source for 6c45pi's???
  200. phono preamp design for c3m postie valve
  201. McMartin MA-50 Troubleshooting
  202. looking for something different
  203. mc275
  204. Sv572-3 Se
  205. Alps step attenuator
  206. seeking real kt90 pp schematics
  207. -50V negative supply
  208. Inductance coupling between chokes
  209. Mercury Magnetics
  210. warming up thetubes
  211. distorsion
  212. using a plate choke?
  213. Should I trash these tubes
  214. Minature Vaccum Tube Question
  215. 46 tube user
  216. Smells like a mistake
  217. Help for my hybird zero feedback AMP
  218. help on ul transformer please
  219. Wiring the D3a as triode - What is best?
  220. Switching from ultralinear to triode
  221. Help for a Output Transfo problem
  222. Pentode models
  223. Good or bad to use parallel capacitors of same value in signal path...
  224. Urgent: Need Help on Schematics (Tube Pre-Amplifier)
  225. ASL wave 8 mods
  226. lectron jh 60 help----------------
  227. crown tube poweramp
  228. Alan kimmel mu stage article
  229. What would you do with this amp?
  230. tube software
  231. Simple Valve Preamplifier
  232. Current sourced heaters in a CF
  233. Tubes and music styles
  234. Cheap SE EL84
  235. Making a living out of tubes? (A little off-topic)
  236. EL84 matched pairs
  237. Tango XE20S voltage rating?
  238. power transformer heat
  239. Used Tube Amps, second life..
  240. Tubes
  241. Taylor 845
  242. AVO CT-160 Tube Tester - how to remove knobs?? - please help
  243. The DIYHifiSupply.com Joplin amplifier Kit
  244. Berning P-1 Preamp
  245. Which tube for OPT 7,5k SE low watts???
  246. help me with this puzzle...
  247. Univox 1501 Fried Resistors
  248. It makes me wonder ...
  249. Tubes operating in horizontal position
  250. Dewald radio N-803b keep or use parts?

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