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  1. RIAA Schematics?
  2. Line out for subwoofer in tube amps
  3. Feedback in IT coupled amps?
  4. Filemant Voltage
  5. DC compensated SE output transformer
  6. Winding an audio transformer
  7. Tube effects Loop Schematics... ?
  8. KT100...what's this ??
  9. Help measuring output impedience
  10. tubes
  11. Need PP KT-88 amp design and KT-88 for triode use?
  12. 7241 tube
  13. Max B+ for 807 UL?
  14. Problem with my Darling!
  15. Effect of cross-coupled "local" FB on plate load of previous stage
  16. DC coupled long tailed pairs
  17. I need an advice for these tubes..
  18. Anode Resistors on PPP Amps
  19. help with modifing a H/K A500 amp
  20. Damper Diode Musings
  21. Heater Question
  22. Push pull designs.
  23. Anybody heard about Tarzian Silicon Rectifier for Tube Rectifier Replacement?
  24. Voice of Music 555 phonograph
  25. Direct driving of GM70 by one ECL86 ???
  26. Bogen amp schematic
  27. 6336a
  28. Power transformer colors & wiring
  29. Stepped Attenuator and Selector Switch
  30. Music without speakers? Need help.
  31. el84 ultra linear datat sheet
  32. 2a3 layout
  33. Matisse Ref per amp
  34. Recommendations for Simple SET Amp Topologies
  35. HV power supply repair
  36. Grundig Model 3265U Restore?
  37. Valve Art EL 156!
  38. Classe A 6550 40W
  39. Lafayette Bypass Option
  40. Plate curves or Op Point for 6KN8?
  41. 12e1 sub for 807 ?
  42. Extremely low power and low loss transformers
  43. looking for power supply diagram SE 813 45 Watt
  44. How to make this 6C33C better??
  45. All octal 6AS7 PP amp – is it possible?
  46. Toroids VS EI Transfomers
  47. Bias secrets for a HH Scott 233?!?
  48. new idea of DHT heater supply
  49. Eastern Audio transformers: any good?
  50. UL40-S2 schematic
  51. Tube monster amplifier
  52. Big pentode help!
  53. which one?
  54. system matching
  55. a 5ar4 problem
  56. coupling capacitor intermediate values
  57. Quicksilver Mono 60 upgrades
  58. Can anything be done
  59. OTL ECC88 amp
  60. Bridging Mono Blocks
  61. Cathode-coupled Phase Splitter Formula
  62. Drd 45, 300b
  63. SV572-30: Opinions?
  64. Poor man's transformer volume control?
  65. Output current of this CAT SL-1 schematic ?
  66. Fixed Bias Circuit for 300B
  67. want to build SE450TL
  68. Tubes lifetime and sound
  69. Heater supply problem?
  70. Lowering HV secondary on Power Transformer
  71. Van der Veen 70W tube Amp DIY
  72. 5751 for marantz 7 linestage
  73. To be or not to be, UL or quad?
  74. Tube Failure
  75. 12AX7 Compared!
  76. transformer case grounding
  77. pre/amplifier grounding
  78. First Time Amp
  79. 6ck4 pp amp
  80. JJ electros, any good?
  81. fun with amps
  82. Newbie needs clarification
  83. looking for powerful Single Ended diagram.
  84. Power amp output newbie question
  85. SE ultralinear amplifier generate a lot of Odd harmonics ?
  86. Grounding Filament CT?
  87. one more 12B4A preamp
  88. 6V6PP -> 6L6 PP with triode connection.
  89. ? about powering a sub with a Fisher 30a mono amp.
  90. Pin out conversion 6V6-6AQ5A
  91. 211
  92. Nice looking rectifier tubes help
  93. Stepped attenuator inquiry
  94. Designing a Phonostage with the S&B 10K LCR RIAA Module
  95. 211 tube
  96. The T-Rex SET Amplifier DIY project
  97. Strange Wiring in Bogen 6v6 PP
  98. 6AS7 amp schematics
  99. Blue glow confused :(
  100. 6V6 SE and Screen Grid Voltage
  101. 6BQ5 <-> 6V6 without socket job...Any Idea?
  102. Melbourne, Australia valve enthusiasts check in!
  103. HELP! Blown R + HIGH V!
  104. PCB Pad Layout for B9A Noval
  105. DIY tube amps - help??
  106. New home made S.E amps
  107. Amplifier Oscillation
  108. First project, need guidance
  109. Cap max value after 6X5GT/EZ35 rectifier?
  110. Any tube-heads in Scotland?
  111. Care and Feeding of Tube Pins / Sockets
  112. MFA Luminescence--need schematic
  113. Tube technology amplifier
  114. Transformer questions
  115. Siemens C3g headamp problem
  116. rca83 hash?
  117. Skyline SK-10 Amplifier info?
  118. Tube Stereo Consoles from Thrift Stores
  119. Aikido amp theoretical questions
  120. 6V6 Single and 12AT7 SRPP
  121. What 45 SET amp should I build?
  122. Ping. Burnedfingers...
  123. ? problem with www.ampwares.com ?
  124. Pentode spud...?
  125. Type 46 as voltage amplifier
  126. Tube compressor problem!
  127. Using the 83
  128. Organ amp project
  129. Any feedback on these trannies?
  130. 300B PP bias and expected life time
  131. Mono block restoration
  132. Question about cathode bypass capacitor
  133. www.diytube.com Kits
  134. need help!
  135. Need opinion on PS for tube preamp.
  136. Stanley Mullard
  137. 6AK4, Anyone?
  138. interstage transformer
  139. Are matched sets important for this amp?
  140. What to do with ECC88's?
  141. EL38's ?
  142. Cables/tubes for Valve Amp
  143. 8233 / E55L Applications
  144. amplimo budget outputtransformer
  145. Output Transformers for WE-437a WOT Line Preamp
  146. plate resistor, input lead
  147. KT88 PP with Class-A/Class-AB switch
  148. very loud preamp
  149. Pentode current sink
  150. Hammond vs. James?
  151. Tubes for Scott Nixon dac
  152. James SE OPT for 300B & 2A3 on eBay
  153. pre-amp with 6as7??
  154. pre-amp with voltage gain from transformer only
  155. Help! Mystery tube (?) amp (type: HK56)
  156. Regulate the high voltage making better sound? (Preamp)
  157. Power Transformer
  158. Potentiometers UK
  159. AC 120V, neutral, hot, ground
  160. Counterpoint SA-220 Tube section advice needed
  161. 807 Amp
  162. Help me to choose the adequate ferrites
  163. Looking for KT88 circuits.
  164. Building a power amp - help
  165. Sovtek EL34WXT.
  166. Microphonic
  167. preamp gain and output transformer question
  168. Would an s5 K-12M kit suffice?
  169. 6c45 and passive volume control?
  170. Something of Interest to Newbies
  171. Chinese Tube Amp & DIY .. Pro & Con
  172. Franks Ultimate Preamp....
  173. Interstage Transformer Nomenclature
  174. PP or SE for Horns?
  175. Output transformer in SIMetrix?
  176. seampcad
  177. Looking for an amp project
  178. Unison Research Smart 845 schematics
  179. 8233, 8116 &amp; 6BZ6 valves - what are they good for?
  180. HELP - From the audiophile Heads - Amp Advice
  181. wires of output transformer are too thin!
  182. Reichert Feral Eye
  183. BIG LOUD SCREECH on LEFT channel only
  184. humming from volume
  185. Paia TubeHead and Symmetry Trims
  186. Output trafo for WE-91 L'Audiophile amp?
  187. Transformer voltage too high for 300B amp
  188. More shopping help please - GE Combo 330
  189. Bias filtering
  190. PP pentode screen supply
  191. 6v6 and OPT with 10-12k ohm(primary impedence)
  192. Identity Help - Is it worth working on
  193. Need info about 5G84 tube
  194. RF Noise in Power Supply
  195. My audionote Kit one have problem on 300B cathode terminal
  196. Partial Feedback Amplifiers
  197. filament transformer vs plate transformer
  198. Any subs for 6N1 & 6N2 twin triode valves?
  199. PSU questions
  200. Any designs for 6EJ7 out there?
  201. SRPP headphoneamp with E88CC
  202. newbie to DIY
  203. Just bought a leak stereo 20 (pics!)
  204. Mysterious Output Transformer....
  205. Hum free 5687 AC filament supply, is it possable ?
  206. Will This Preamp Work
  207. help with input pot on el84 PP amp
  208. NOS Philmore Output Transformern or Modern
  209. tube amp
  210. power supply, Help please!!!
  211. Tubes and magnetic fields
  212. Driver tube for 45 interstage 1:1
  213. 89 db is it enough ?
  214. Troubl-shooting heater voltage for filament
  215. arcing in rectifier tube
  216. 1/8" Aluminum for top plate?
  217. Shopping list
  218. 6sn7 valves
  219. Neon flashes with the music
  220. Help in SE 807 amp
  221. naim user defects to valves !
  222. tamura opt need help
  223. Line stage question
  224. Tube question, how to read the difference.
  225. What Tube amp for Biginner?
  226. Leak Stereo 20 rebuild/restore question
  227. Is there any advantage in using preamp tubes in output stages ??
  228. 12b4 as PP output tubes
  229. Valves stripped bare….
  230. Anybody know this TUBE?
  231. Noob Q: are the efficiency figures for valve amps the same as with transistors?
  232. Need help understanding something about UL stages
  233. I'd like to make a simple 50 amplifier
  234. gates tube pre-amp info??
  235. OT - To those who correspond with me....
  236. Could use info on Grommes + knight.
  237. Single Ended Ultra linear, anyone built one?
  238. Audio Innovations 800 Anniversary problem
  239. Transformer coupled 6SN7 push-pull DAC output stage?
  240. Vkh max voltage
  241. Mosfet differences with valves
  242. Need schematic - Audio Research LS2B MKII
  243. EL84M specs.
  244. What to do with these?
  245. Dyna Mk IV Driver Boards
  246. OTL driving series arrays
  247. Voltage problem
  248. Amp intermittently blowing fuse at power up
  249. Worlds Best Preamp
  250. Heathkit TT-1A Calibration

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