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  1. HV power supply repair
  2. Grundig Model 3265U Restore?
  3. Valve Art EL 156!
  4. Classe A 6550 40W
  5. Lafayette Bypass Option
  6. Plate curves or Op Point for 6KN8?
  7. 12e1 sub for 807 ?
  8. Extremely low power and low loss transformers
  9. looking for power supply diagram SE 813 45 Watt
  10. How to make this 6C33C better??
  11. All octal 6AS7 PP amp – is it possible?
  12. Toroids VS EI Transfomers
  13. Bias secrets for a HH Scott 233?!?
  14. new idea of DHT heater supply
  15. UL40-S2 schematic
  16. Eastern Audio transformers: any good?
  17. Tube monster amplifier
  18. Big pentode help!
  19. which one?
  20. system matching
  21. a 5ar4 problem
  22. coupling capacitor intermediate values
  23. Quicksilver Mono 60 upgrades
  24. Can anything be done
  25. OTL ECC88 amp
  26. Bridging Mono Blocks
  27. Cathode-coupled Phase Splitter Formula
  28. Drd 45, 300b
  29. SV572-30: Opinions?
  30. Poor man's transformer volume control?
  31. Output current of this CAT SL-1 schematic ?
  32. Fixed Bias Circuit for 300B
  33. want to build SE450TL
  34. Tubes lifetime and sound
  35. Heater supply problem?
  36. Lowering HV secondary on Power Transformer
  37. Van der Veen 70W tube Amp DIY
  38. 5751 for marantz 7 linestage
  39. To be or not to be, UL or quad?
  40. Tube Failure
  41. 12AX7 Compared!
  42. transformer case grounding
  43. pre/amplifier grounding
  44. First Time Amp
  45. 6ck4 pp amp
  46. JJ electros, any good?
  47. 6AQ5A guitar amp revisited
  48. fun with amps
  49. Newbie needs clarification
  50. looking for powerful Single Ended diagram.
  51. Power amp output newbie question
  52. SE ultralinear amplifier generate a lot of Odd harmonics ?
  53. Grounding Filament CT?
  54. one more 12B4A preamp
  55. 6V6PP -> 6L6 PP with triode connection.
  56. ? about powering a sub with a Fisher 30a mono amp.
  57. Will This Blow Up?
  58. Pin out conversion 6V6-6AQ5A
  59. 211
  60. Nice looking rectifier tubes help
  61. Stepped attenuator inquiry
  62. Designing a Phonostage with the S&B 10K LCR RIAA Module
  63. 211 tube
  64. The T-Rex SET Amplifier DIY project
  65. Strange Wiring in Bogen 6v6 PP
  66. 6AS7 amp schematics
  67. Blue glow confused :(
  68. 6V6 SE and Screen Grid Voltage
  69. 6BQ5 <-> 6V6 without socket job...Any Idea?
  70. Melbourne, Australia valve enthusiasts check in!
  71. HELP! Blown R + HIGH V!
  72. PCB Pad Layout for B9A Noval
  73. DIY tube amps - help??
  74. New home made S.E amps
  75. Amplifier Oscillation
  76. First project, need guidance
  77. Cap max value after 6X5GT/EZ35 rectifier?
  78. Any tube-heads in Scotland?
  79. Care and Feeding of Tube Pins / Sockets
  80. MFA Luminescence--need schematic
  81. Tube technology amplifier
  82. Transformer questions
  83. Siemens C3g headamp problem
  84. rca83 hash?
  85. Skyline SK-10 Amplifier info?
  86. Tube Stereo Consoles from Thrift Stores
  87. Aikido amp theoretical questions
  88. 6V6 Single and 12AT7 SRPP
  89. What 45 SET amp should I build?
  90. Ping. Burnedfingers...
  91. ? problem with www.ampwares.com ?
  92. Pentode spud...?
  93. Type 46 as voltage amplifier
  94. Tube compressor problem!
  95. Using the 83
  96. Organ amp project
  97. Any feedback on these trannies?
  98. 300B PP bias and expected life time
  99. Mono block restoration
  100. Question about cathode bypass capacitor
  101. www.diytube.com Kits
  102. need help!
  103. Need opinion on PS for tube preamp.
  104. Stanley Mullard
  105. 6AK4, Anyone?
  106. interstage transformer
  107. Are matched sets important for this amp?
  108. What to do with ECC88's?
  109. EL38's ?
  110. Cables/tubes for Valve Amp
  111. 8233 / E55L Applications
  112. amplimo budget outputtransformer
  113. Output Transformers for WE-437a WOT Line Preamp
  114. plate resistor, input lead
  115. KT88 PP with Class-A/Class-AB switch
  116. very loud preamp
  117. Pentode current sink
  118. Hammond vs. James?
  119. Tubes for Scott Nixon dac
  120. James SE OPT for 300B & 2A3 on eBay
  121. pre-amp with 6as7??
  122. pre-amp with voltage gain from transformer only
  123. Help! Mystery tube (?) amp (type: HK56)
  124. Regulate the high voltage making better sound? (Preamp)
  125. Power Transformer
  126. Potentiometers UK
  127. AC 120V, neutral, hot, ground
  128. Counterpoint SA-220 Tube section advice needed
  129. 807 Amp
  130. Help me to choose the adequate ferrites
  131. Looking for KT88 circuits.
  132. Building a power amp - help
  133. Sovtek EL34WXT.
  134. Microphonic
  135. preamp gain and output transformer question
  136. Would an s5 K-12M kit suffice?
  137. 6c45 and passive volume control?
  138. Something of Interest to Newbies
  139. Fender Output transformer as an audio amp part
  140. Chinese Tube Amp & DIY .. Pro & Con
  141. Franks Ultimate Preamp....
  142. Interstage Transformer Nomenclature
  143. PP or SE for Horns?
  144. Output transformer in SIMetrix?
  145. seampcad
  146. Looking for an amp project
  147. Unison Research Smart 845 schematics
  148. 8233, 8116 &amp; 6BZ6 valves - what are they good for?
  149. HELP - From the audiophile Heads - Amp Advice
  150. wires of output transformer are too thin!
  151. Reichert Feral Eye
  152. BIG LOUD SCREECH on LEFT channel only
  153. humming from volume
  154. Paia TubeHead and Symmetry Trims
  155. Output trafo for WE-91 L'Audiophile amp?
  156. Transformer voltage too high for 300B amp
  157. More shopping help please - GE Combo 330
  158. Bias filtering
  159. PP pentode screen supply
  160. 6v6 and OPT with 10-12k ohm(primary impedence)
  161. Identity Help - Is it worth working on
  162. Need info about 5G84 tube
  163. RF Noise in Power Supply
  164. My audionote Kit one have problem on 300B cathode terminal
  165. Partial Feedback Amplifiers
  166. filament transformer vs plate transformer
  167. Any subs for 6N1 & 6N2 twin triode valves?
  168. PSU questions
  169. Any designs for 6EJ7 out there?
  170. SRPP headphoneamp with E88CC
  171. newbie to DIY
  172. Just bought a leak stereo 20 (pics!)
  173. Mysterious Output Transformer....
  174. Hum free 5687 AC filament supply, is it possable ?
  175. Will This Preamp Work
  176. help with input pot on el84 PP amp
  177. NOS Philmore Output Transformern or Modern
  178. tube amp
  179. power supply, Help please!!!
  180. Tubes and magnetic fields
  181. Driver tube for 45 interstage 1:1
  182. 89 db is it enough ?
  183. Troubl-shooting heater voltage for filament
  184. arcing in rectifier tube
  185. 1/8" Aluminum for top plate?
  186. Shopping list
  187. 6sn7 valves
  188. Neon flashes with the music
  189. Help in SE 807 amp
  190. naim user defects to valves !
  191. tamura opt need help
  192. Line stage question
  193. Tube question, how to read the difference.
  194. What Tube amp for Biginner?
  195. Leak Stereo 20 rebuild/restore question
  196. Is there any advantage in using preamp tubes in output stages ??
  197. 12b4 as PP output tubes
  198. Valves stripped bare….
  199. Anybody know this TUBE?
  200. Noob Q: are the efficiency figures for valve amps the same as with transistors?
  201. Need help understanding something about UL stages
  202. I'd like to make a simple 50 amplifier
  203. gates tube pre-amp info??
  204. OT - To those who correspond with me....
  205. Could use info on Grommes + knight.
  206. Single Ended Ultra linear, anyone built one?
  207. Audio Innovations 800 Anniversary problem
  208. Transformer coupled 6SN7 push-pull DAC output stage?
  209. Vkh max voltage
  210. Mosfet differences with valves
  211. Need schematic - Audio Research LS2B MKII
  212. EL84M specs.
  213. What to do with these?
  214. Dyna Mk IV Driver Boards
  215. OTL driving series arrays
  216. Voltage problem
  217. Amp intermittently blowing fuse at power up
  218. Worlds Best Preamp
  219. Heathkit TT-1A Calibration
  220. surplus 12ax7a
  221. Phase Splitter as input stage
  222. DHT DC heater question
  223. Wanted-Assembly manual for Scott LK-150
  224. Happy new year, sophielove.
  225. Need UTC PVM-3 primary ?
  226. power amp for small studio
  227. Preamp
  228. Problems with EICO HF-12 amp.
  229. Technics SU-30A's schema???
  230. Tube PWM driver
  231. Tungsram tube data
  232. S-5 Electronics K-12M (11MS8) 8 wpc PP Tube Amp Kit ($139)
  233. sharp cutoff pentode
  234. JJ E34L failure(s)
  235. Valve effects loop
  236. Bruce Moore "Companion" - Schematic
  237. CT impedence mismatch?
  238. Tube multiplex adapter parts replacement
  239. SY gets jiggy (5692 measurements)
  240. Tube Drag Racing!
  241. OTL, quick `n dirty
  242. 6V6 stereo amp
  243. humming from amplifier
  244. Mesa boogie
  245. Any tube audiophile in New Dephli, India
  246. What are terminal 1 & 4 of 300B tube
  247. Tube Nube - need advice on Scott LK150
  248. Pentode AB1 or AB2?
  249. #56 tube line stage
  250. **** another unusual hum problem !!

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