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  1. Need PP KT-88 amp design and KT-88 for triode use?
  2. 7241 tube
  3. Max B+ for 807 UL?
  4. Fender amplifier.. burnt choke ??
  5. Problem with my Darling!
  6. Effect of cross-coupled "local" FB on plate load of previous stage
  7. wickedly awsome guitar amp
  8. DC coupled long tailed pairs
  9. I need an advice for these tubes..
  10. Anode Resistors on PPP Amps
  11. help with modifing a H/K A500 amp
  12. Damper Diode Musings
  13. Heater Question
  14. Push pull designs.
  15. Anybody heard about Tarzian Silicon Rectifier for Tube Rectifier Replacement?
  16. Voice of Music 555 phonograph
  17. Direct driving of GM70 by one ECL86 ???
  18. Bogen amp schematic
  19. 6336a
  20. Power transformer colors & wiring
  21. Stepped Attenuator and Selector Switch
  22. Music without speakers? Need help.
  23. el84 ultra linear datat sheet
  24. 2a3 layout
  25. Matisse Ref per amp
  26. Recommendations for Simple SET Amp Topologies
  27. HV power supply repair
  28. Grundig Model 3265U Restore?
  29. Valve Art EL 156!
  30. Classe A 6550 40W
  31. Lafayette Bypass Option
  32. Plate curves or Op Point for 6KN8?
  33. 12e1 sub for 807 ?
  34. Extremely low power and low loss transformers
  35. looking for power supply diagram SE 813 45 Watt
  36. How to make this 6C33C better??
  37. All octal 6AS7 PP amp – is it possible?
  38. Toroids VS EI Transfomers
  39. Bias secrets for a HH Scott 233?!?
  40. new idea of DHT heater supply
  41. UL40-S2 schematic
  42. Eastern Audio transformers: any good?
  43. Tube monster amplifier
  44. Big pentode help!
  45. which one?
  46. system matching
  47. a 5ar4 problem
  48. coupling capacitor intermediate values
  49. Quicksilver Mono 60 upgrades
  50. Can anything be done
  51. OTL ECC88 amp
  52. Bridging Mono Blocks
  53. Cathode-coupled Phase Splitter Formula
  54. Drd 45, 300b
  55. SV572-30: Opinions?
  56. Poor man's transformer volume control?
  57. Output current of this CAT SL-1 schematic ?
  58. Fixed Bias Circuit for 300B
  59. want to build SE450TL
  60. Tubes lifetime and sound
  61. Heater supply problem?
  62. Lowering HV secondary on Power Transformer
  63. Van der Veen 70W tube Amp DIY
  64. 5751 for marantz 7 linestage
  65. To be or not to be, UL or quad?
  66. Tube Failure
  67. 12AX7 Compared!
  68. transformer case grounding
  69. pre/amplifier grounding
  70. First Time Amp
  71. 6ck4 pp amp
  72. JJ electros, any good?
  73. 6AQ5A guitar amp revisited
  74. fun with amps
  75. Newbie needs clarification
  76. looking for powerful Single Ended diagram.
  77. Power amp output newbie question
  78. SE ultralinear amplifier generate a lot of Odd harmonics ?
  79. Grounding Filament CT?
  80. one more 12B4A preamp
  81. 6V6PP -> 6L6 PP with triode connection.
  82. ? about powering a sub with a Fisher 30a mono amp.
  83. Will This Blow Up?
  84. Pin out conversion 6V6-6AQ5A
  85. 211
  86. Nice looking rectifier tubes help
  87. Stepped attenuator inquiry
  88. Designing a Phonostage with the S&B 10K LCR RIAA Module
  89. 211 tube
  90. The T-Rex SET Amplifier DIY project
  91. Strange Wiring in Bogen 6v6 PP
  92. 6AS7 amp schematics
  93. Blue glow confused :(
  94. 6V6 SE and Screen Grid Voltage
  95. 6BQ5 <-> 6V6 without socket job...Any Idea?
  96. Melbourne, Australia valve enthusiasts check in!
  97. HELP! Blown R + HIGH V!
  98. PCB Pad Layout for B9A Noval
  99. DIY tube amps - help??
  100. New home made S.E amps
  101. Amplifier Oscillation
  102. First project, need guidance
  103. Cap max value after 6X5GT/EZ35 rectifier?
  104. Any tube-heads in Scotland?
  105. Care and Feeding of Tube Pins / Sockets
  106. MFA Luminescence--need schematic
  107. Tube technology amplifier
  108. Transformer questions
  109. Siemens C3g headamp problem
  110. rca83 hash?
  111. Skyline SK-10 Amplifier info?
  112. Tube Stereo Consoles from Thrift Stores
  113. Aikido amp theoretical questions
  114. 6V6 Single and 12AT7 SRPP
  115. What 45 SET amp should I build?
  116. Ping. Burnedfingers...
  117. ? problem with www.ampwares.com ?
  118. Pentode spud...?
  119. Type 46 as voltage amplifier
  120. Tube compressor problem!
  121. Using the 83
  122. Organ amp project
  123. Any feedback on these trannies?
  124. 300B PP bias and expected life time
  125. Mono block restoration
  126. Question about cathode bypass capacitor
  127. www.diytube.com Kits
  128. need help!
  129. Need opinion on PS for tube preamp.
  130. Stanley Mullard
  131. 6AK4, Anyone?
  132. interstage transformer
  133. Are matched sets important for this amp?
  134. What to do with ECC88's?
  135. EL38's ?
  136. Cables/tubes for Valve Amp
  137. 8233 / E55L Applications
  138. amplimo budget outputtransformer
  139. Output Transformers for WE-437a WOT Line Preamp
  140. plate resistor, input lead
  141. KT88 PP with Class-A/Class-AB switch
  142. very loud preamp
  143. Pentode current sink
  144. Hammond vs. James?
  145. Tubes for Scott Nixon dac
  146. James SE OPT for 300B & 2A3 on eBay
  147. pre-amp with 6as7??
  148. pre-amp with voltage gain from transformer only
  149. Help! Mystery tube (?) amp (type: HK56)
  150. Regulate the high voltage making better sound? (Preamp)
  151. Power Transformer
  152. Potentiometers UK
  153. AC 120V, neutral, hot, ground
  154. Counterpoint SA-220 Tube section advice needed
  155. 807 Amp
  156. Help me to choose the adequate ferrites
  157. Looking for KT88 circuits.
  158. Building a power amp - help
  159. Sovtek EL34WXT.
  160. Microphonic
  161. preamp gain and output transformer question
  162. Would an s5 K-12M kit suffice?
  163. 6c45 and passive volume control?
  164. Something of Interest to Newbies
  165. Fender Output transformer as an audio amp part
  166. Chinese Tube Amp & DIY .. Pro & Con
  167. Franks Ultimate Preamp....
  168. Interstage Transformer Nomenclature
  169. PP or SE for Horns?
  170. Output transformer in SIMetrix?
  171. seampcad
  172. Looking for an amp project
  173. Unison Research Smart 845 schematics
  174. HELP - From the audiophile Heads - Amp Advice
  175. 8233, 8116 &amp; 6BZ6 valves - what are they good for?
  176. wires of output transformer are too thin!
  177. Reichert Feral Eye
  178. BIG LOUD SCREECH on LEFT channel only
  179. humming from volume
  180. Paia TubeHead and Symmetry Trims
  181. Output trafo for WE-91 L'Audiophile amp?
  182. Transformer voltage too high for 300B amp
  183. More shopping help please - GE Combo 330
  184. Bias filtering
  185. PP pentode screen supply
  186. 6v6 and OPT with 10-12k ohm(primary impedence)
  187. Identity Help - Is it worth working on
  188. Need info about 5G84 tube
  189. RF Noise in Power Supply
  190. My audionote Kit one have problem on 300B cathode terminal
  191. Partial Feedback Amplifiers
  192. filament transformer vs plate transformer
  193. Any subs for 6N1 & 6N2 twin triode valves?
  194. PSU questions
  195. Any designs for 6EJ7 out there?
  196. SRPP headphoneamp with E88CC
  197. newbie to DIY
  198. Just bought a leak stereo 20 (pics!)
  199. Mysterious Output Transformer....
  200. Hum free 5687 AC filament supply, is it possable ?
  201. Will This Preamp Work
  202. help with input pot on el84 PP amp
  203. NOS Philmore Output Transformern or Modern
  204. tube amp
  205. power supply, Help please!!!
  206. Tubes and magnetic fields
  207. Driver tube for 45 interstage 1:1
  208. 89 db is it enough ?
  209. Troubl-shooting heater voltage for filament
  210. arcing in rectifier tube
  211. 1/8" Aluminum for top plate?
  212. Shopping list
  213. 6sn7 valves
  214. Neon flashes with the music
  215. Help in SE 807 amp
  216. naim user defects to valves !
  217. tamura opt need help
  218. Line stage question
  219. Tube question, how to read the difference.
  220. What Tube amp for Biginner?
  221. Leak Stereo 20 rebuild/restore question
  222. Is there any advantage in using preamp tubes in output stages ??
  223. 12b4 as PP output tubes
  224. Valves stripped bare….
  225. Anybody know this TUBE?
  226. Noob Q: are the efficiency figures for valve amps the same as with transistors?
  227. Need help understanding something about UL stages
  228. I'd like to make a simple 50 amplifier
  229. gates tube pre-amp info??
  230. OT - To those who correspond with me....
  231. Could use info on Grommes + knight.
  232. Single Ended Ultra linear, anyone built one?
  233. Audio Innovations 800 Anniversary problem
  234. Transformer coupled 6SN7 push-pull DAC output stage?
  235. Vkh max voltage
  236. Mosfet differences with valves
  237. Need schematic - Audio Research LS2B MKII
  238. EL84M specs.
  239. What to do with these?
  240. Dyna Mk IV Driver Boards
  241. OTL driving series arrays
  242. Voltage problem
  243. Amp intermittently blowing fuse at power up
  244. Worlds Best Preamp
  245. Heathkit TT-1A Calibration
  246. surplus 12ax7a
  247. Phase Splitter as input stage
  248. DHT DC heater question
  249. Wanted-Assembly manual for Scott LK-150
  250. Happy new year, sophielove.

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