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  1. Billington valves and quallity
  2. Regulated PSU, your comments please.
  3. Change coupling cap from .47uf to 2.2uf
  4. RIAA Schematics?
  5. Line out for subwoofer in tube amps
  6. Feedback in IT coupled amps?
  7. Filemant Voltage
  8. DC compensated SE output transformer
  9. Winding an audio transformer
  10. Tube effects Loop Schematics... ?
  11. Scrap Heathkit W-5m for guitar amp?
  12. KT100...what's this ??
  13. Help measuring output impedience
  14. tubes
  15. Need PP KT-88 amp design and KT-88 for triode use?
  16. 7241 tube
  17. Max B+ for 807 UL?
  18. Fender amplifier.. burnt choke ??
  19. Problem with my Darling!
  20. Effect of cross-coupled "local" FB on plate load of previous stage
  21. wickedly awsome guitar amp
  22. DC coupled long tailed pairs
  23. I need an advice for these tubes..
  24. Anode Resistors on PPP Amps
  25. help with modifing a H/K A500 amp
  26. Damper Diode Musings
  27. Heater Question
  28. Push pull designs.
  29. Anybody heard about Tarzian Silicon Rectifier for Tube Rectifier Replacement?
  30. Voice of Music 555 phonograph
  31. Direct driving of GM70 by one ECL86 ???
  32. Bogen amp schematic
  33. 6336a
  34. Power transformer colors & wiring
  35. Stepped Attenuator and Selector Switch
  36. Music without speakers? Need help.
  37. el84 ultra linear datat sheet
  38. 2a3 layout
  39. Matisse Ref per amp
  40. Recommendations for Simple SET Amp Topologies
  41. HV power supply repair
  42. Grundig Model 3265U Restore?
  43. Valve Art EL 156!
  44. Classe A 6550 40W
  45. Lafayette Bypass Option
  46. Plate curves or Op Point for 6KN8?
  47. 12e1 sub for 807 ?
  48. Extremely low power and low loss transformers
  49. looking for power supply diagram SE 813 45 Watt
  50. How to make this 6C33C better??
  51. All octal 6AS7 PP amp – is it possible?
  52. Toroids VS EI Transfomers
  53. Bias secrets for a HH Scott 233?!?
  54. new idea of DHT heater supply
  55. Eastern Audio transformers: any good?
  56. UL40-S2 schematic
  57. Tube monster amplifier
  58. Big pentode help!
  59. which one?
  60. system matching
  61. a 5ar4 problem
  62. coupling capacitor intermediate values
  63. Quicksilver Mono 60 upgrades
  64. Can anything be done
  65. OTL ECC88 amp
  66. Bridging Mono Blocks
  67. Cathode-coupled Phase Splitter Formula
  68. Drd 45, 300b
  69. SV572-30: Opinions?
  70. Poor man's transformer volume control?
  71. Output current of this CAT SL-1 schematic ?
  72. Fixed Bias Circuit for 300B
  73. want to build SE450TL
  74. Tubes lifetime and sound
  75. Heater supply problem?
  76. Lowering HV secondary on Power Transformer
  77. Van der Veen 70W tube Amp DIY
  78. 5751 for marantz 7 linestage
  79. To be or not to be, UL or quad?
  80. Tube Failure
  81. 12AX7 Compared!
  82. transformer case grounding
  83. pre/amplifier grounding
  84. First Time Amp
  85. 6ck4 pp amp
  86. JJ electros, any good?
  87. 6AQ5A guitar amp revisited
  88. fun with amps
  89. Newbie needs clarification
  90. looking for powerful Single Ended diagram.
  91. Power amp output newbie question
  92. SE ultralinear amplifier generate a lot of Odd harmonics ?
  93. Grounding Filament CT?
  94. one more 12B4A preamp
  95. 6V6PP -> 6L6 PP with triode connection.
  96. ? about powering a sub with a Fisher 30a mono amp.
  97. Will This Blow Up?
  98. Pin out conversion 6V6-6AQ5A
  99. 211
  100. Nice looking rectifier tubes help
  101. Stepped attenuator inquiry
  102. Designing a Phonostage with the S&B 10K LCR RIAA Module
  103. 211 tube
  104. The T-Rex SET Amplifier DIY project
  105. Strange Wiring in Bogen 6v6 PP
  106. 6AS7 amp schematics
  107. Blue glow confused :(
  108. 6V6 SE and Screen Grid Voltage
  109. 6BQ5 <-> 6V6 without socket job...Any Idea?
  110. Melbourne, Australia valve enthusiasts check in!
  111. HELP! Blown R + HIGH V!
  112. PCB Pad Layout for B9A Noval
  113. DIY tube amps - help??
  114. New home made S.E amps
  115. Amplifier Oscillation
  116. First project, need guidance
  117. Cap max value after 6X5GT/EZ35 rectifier?
  118. Any tube-heads in Scotland?
  119. Care and Feeding of Tube Pins / Sockets
  120. MFA Luminescence--need schematic
  121. Tube technology amplifier
  122. Transformer questions
  123. Siemens C3g headamp problem
  124. rca83 hash?
  125. Skyline SK-10 Amplifier info?
  126. Tube Stereo Consoles from Thrift Stores
  127. Aikido amp theoretical questions
  128. 6V6 Single and 12AT7 SRPP
  129. What 45 SET amp should I build?
  130. Ping. Burnedfingers...
  131. ? problem with www.ampwares.com ?
  132. Pentode spud...?
  133. Type 46 as voltage amplifier
  134. Tube compressor problem!
  135. Using the 83
  136. Organ amp project
  137. Any feedback on these trannies?
  138. 300B PP bias and expected life time
  139. Mono block restoration
  140. Question about cathode bypass capacitor
  141. www.diytube.com Kits
  142. need help!
  143. Need opinion on PS for tube preamp.
  144. Stanley Mullard
  145. 6AK4, Anyone?
  146. interstage transformer
  147. Are matched sets important for this amp?
  148. What to do with ECC88's?
  149. EL38's ?
  150. Cables/tubes for Valve Amp
  151. 8233 / E55L Applications
  152. amplimo budget outputtransformer
  153. Output Transformers for WE-437a WOT Line Preamp
  154. plate resistor, input lead
  155. KT88 PP with Class-A/Class-AB switch
  156. very loud preamp
  157. Pentode current sink
  158. Hammond vs. James?
  159. Tubes for Scott Nixon dac
  160. James SE OPT for 300B & 2A3 on eBay
  161. pre-amp with 6as7??
  162. pre-amp with voltage gain from transformer only
  163. Help! Mystery tube (?) amp (type: HK56)
  164. Regulate the high voltage making better sound? (Preamp)
  165. Power Transformer
  166. Potentiometers UK
  167. AC 120V, neutral, hot, ground
  168. Counterpoint SA-220 Tube section advice needed
  169. 807 Amp
  170. Help me to choose the adequate ferrites
  171. Looking for KT88 circuits.
  172. Building a power amp - help
  173. Sovtek EL34WXT.
  174. Microphonic
  175. preamp gain and output transformer question
  176. Would an s5 K-12M kit suffice?
  177. 6c45 and passive volume control?
  178. Something of Interest to Newbies
  179. Fender Output transformer as an audio amp part
  180. Chinese Tube Amp & DIY .. Pro & Con
  181. Franks Ultimate Preamp....
  182. Interstage Transformer Nomenclature
  183. PP or SE for Horns?
  184. Output transformer in SIMetrix?
  185. seampcad
  186. Looking for an amp project
  187. Unison Research Smart 845 schematics
  188. HELP - From the audiophile Heads - Amp Advice
  189. 8233, 8116 &amp; 6BZ6 valves - what are they good for?
  190. wires of output transformer are too thin!
  191. Reichert Feral Eye
  192. BIG LOUD SCREECH on LEFT channel only
  193. humming from volume
  194. Paia TubeHead and Symmetry Trims
  195. Output trafo for WE-91 L'Audiophile amp?
  196. Transformer voltage too high for 300B amp
  197. More shopping help please - GE Combo 330
  198. Bias filtering
  199. PP pentode screen supply
  200. 6v6 and OPT with 10-12k ohm(primary impedence)
  201. Identity Help - Is it worth working on
  202. Need info about 5G84 tube
  203. RF Noise in Power Supply
  204. My audionote Kit one have problem on 300B cathode terminal
  205. Partial Feedback Amplifiers
  206. filament transformer vs plate transformer
  207. Any subs for 6N1 & 6N2 twin triode valves?
  208. PSU questions
  209. Any designs for 6EJ7 out there?
  210. SRPP headphoneamp with E88CC
  211. newbie to DIY
  212. Just bought a leak stereo 20 (pics!)
  213. Mysterious Output Transformer....
  214. Hum free 5687 AC filament supply, is it possable ?
  215. Will This Preamp Work
  216. help with input pot on el84 PP amp
  217. NOS Philmore Output Transformern or Modern
  218. tube amp
  219. power supply, Help please!!!
  220. Tubes and magnetic fields
  221. Driver tube for 45 interstage 1:1
  222. 89 db is it enough ?
  223. Troubl-shooting heater voltage for filament
  224. arcing in rectifier tube
  225. 1/8" Aluminum for top plate?
  226. Shopping list
  227. 6sn7 valves
  228. Neon flashes with the music
  229. Help in SE 807 amp
  230. naim user defects to valves !
  231. tamura opt need help
  232. Line stage question
  233. Tube question, how to read the difference.
  234. What Tube amp for Biginner?
  235. Leak Stereo 20 rebuild/restore question
  236. Is there any advantage in using preamp tubes in output stages ??
  237. 12b4 as PP output tubes
  238. Valves stripped bare….
  239. Anybody know this TUBE?
  240. Noob Q: are the efficiency figures for valve amps the same as with transistors?
  241. Need help understanding something about UL stages
  242. I'd like to make a simple 50 amplifier
  243. gates tube pre-amp info??
  244. OT - To those who correspond with me....
  245. Could use info on Grommes + knight.
  246. Single Ended Ultra linear, anyone built one?
  247. Audio Innovations 800 Anniversary problem
  248. Transformer coupled 6SN7 push-pull DAC output stage?
  249. Vkh max voltage
  250. Mosfet differences with valves

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