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  1. tube distortion effect.
  2. tube rolling Blue Circle BC 21 preamp
  3. A sorry tale which will make you cry !!!
  4. Variac problems
  5. tubeamp project, weekend timekiller
  6. isolated supply grounding
  7. Car preamp with Aikido
  8. Audio Note M1 potentiometer question
  9. Beginner , tube kit suggestions please
  10. Question on OPT
  11. Telefunken S80 Stereo ECL82 Amp- any comment?
  12. Active crossovers using Tubes
  13. 300BSE power amplifier circuit
  14. tube buffer using 12bz7
  15. "Complete" SE KT88
  16. Output Tube biasing for Toroidal Output Transformer
  17. Cardas Golden Capacitors
  18. Tube Buffer for CD-PRO2M (6922)
  19. Troubleshooting fuse blowing
  20. Billington valves and quallity
  21. Regulated PSU, your comments please.
  22. Change coupling cap from .47uf to 2.2uf
  23. RIAA Schematics?
  24. Line out for subwoofer in tube amps
  25. Feedback in IT coupled amps?
  26. Filemant Voltage
  27. DC compensated SE output transformer
  28. Winding an audio transformer
  29. Tube effects Loop Schematics... ?
  30. KT100...what's this ??
  31. Help measuring output impedience
  32. tubes
  33. Need PP KT-88 amp design and KT-88 for triode use?
  34. 7241 tube
  35. Max B+ for 807 UL?
  36. Problem with my Darling!
  37. Effect of cross-coupled "local" FB on plate load of previous stage
  38. DC coupled long tailed pairs
  39. I need an advice for these tubes..
  40. Anode Resistors on PPP Amps
  41. help with modifing a H/K A500 amp
  42. Damper Diode Musings
  43. Heater Question
  44. Push pull designs.
  45. Anybody heard about Tarzian Silicon Rectifier for Tube Rectifier Replacement?
  46. Voice of Music 555 phonograph
  47. Direct driving of GM70 by one ECL86 ???
  48. Bogen amp schematic
  49. 6336a
  50. Power transformer colors & wiring
  51. Stepped Attenuator and Selector Switch
  52. Music without speakers? Need help.
  53. el84 ultra linear datat sheet
  54. 2a3 layout
  55. Matisse Ref per amp
  56. Recommendations for Simple SET Amp Topologies
  57. HV power supply repair
  58. Grundig Model 3265U Restore?
  59. Valve Art EL 156!
  60. Classe A 6550 40W
  61. Lafayette Bypass Option
  62. Plate curves or Op Point for 6KN8?
  63. 12e1 sub for 807 ?
  64. Extremely low power and low loss transformers
  65. looking for power supply diagram SE 813 45 Watt
  66. How to make this 6C33C better??
  67. All octal 6AS7 PP amp is it possible?
  68. Toroids VS EI Transfomers
  69. Bias secrets for a HH Scott 233?!?
  70. new idea of DHT heater supply
  71. UL40-S2 schematic
  72. Eastern Audio transformers: any good?
  73. Tube monster amplifier
  74. Big pentode help!
  75. which one?
  76. system matching
  77. a 5ar4 problem
  78. coupling capacitor intermediate values
  79. Quicksilver Mono 60 upgrades
  80. Can anything be done
  81. OTL ECC88 amp
  82. Bridging Mono Blocks
  83. Cathode-coupled Phase Splitter Formula
  84. Drd 45, 300b
  85. SV572-30: Opinions?
  86. Poor man's transformer volume control?
  87. Output current of this CAT SL-1 schematic ?
  88. Fixed Bias Circuit for 300B
  89. want to build SE450TL
  90. Tubes lifetime and sound
  91. Heater supply problem?
  92. Lowering HV secondary on Power Transformer
  93. Van der Veen 70W tube Amp DIY
  94. 5751 for marantz 7 linestage
  95. To be or not to be, UL or quad?
  96. Tube Failure
  97. 12AX7 Compared!
  98. transformer case grounding
  99. pre/amplifier grounding
  100. First Time Amp
  101. 6ck4 pp amp
  102. JJ electros, any good?
  103. fun with amps
  104. Newbie needs clarification
  105. looking for powerful Single Ended diagram.
  106. Power amp output newbie question
  107. SE ultralinear amplifier generate a lot of Odd harmonics ?
  108. Grounding Filament CT?
  109. one more 12B4A preamp
  110. 6V6PP -> 6L6 PP with triode connection.
  111. ? about powering a sub with a Fisher 30a mono amp.
  112. Pin out conversion 6V6-6AQ5A
  113. 211
  114. Nice looking rectifier tubes help
  115. Stepped attenuator inquiry
  116. Designing a Phonostage with the S&B 10K LCR RIAA Module
  117. 211 tube
  118. The T-Rex SET Amplifier DIY project
  119. Strange Wiring in Bogen 6v6 PP
  120. 6AS7 amp schematics
  121. Blue glow confused :(
  122. 6V6 SE and Screen Grid Voltage
  123. 6BQ5 <-> 6V6 without socket job...Any Idea?
  124. Melbourne, Australia valve enthusiasts check in!
  125. HELP! Blown R + HIGH V!
  126. PCB Pad Layout for B9A Noval
  127. DIY tube amps - help??
  128. New home made S.E amps
  129. Amplifier Oscillation
  130. First project, need guidance
  131. Cap max value after 6X5GT/EZ35 rectifier?
  132. Any tube-heads in Scotland?
  133. Care and Feeding of Tube Pins / Sockets
  134. MFA Luminescence--need schematic
  135. Tube technology amplifier
  136. Transformer questions
  137. Siemens C3g headamp problem
  138. rca83 hash?
  139. Skyline SK-10 Amplifier info?
  140. Tube Stereo Consoles from Thrift Stores
  141. Aikido amp theoretical questions
  142. 6V6 Single and 12AT7 SRPP
  143. What 45 SET amp should I build?
  144. Ping. Burnedfingers...
  145. ? problem with www.ampwares.com ?
  146. Pentode spud...?
  147. Type 46 as voltage amplifier
  148. Tube compressor problem!
  149. Using the 83
  150. Organ amp project
  151. Any feedback on these trannies?
  152. 300B PP bias and expected life time
  153. Mono block restoration
  154. Question about cathode bypass capacitor
  155. www.diytube.com Kits
  156. need help!
  157. Need opinion on PS for tube preamp.
  158. Stanley Mullard
  159. 6AK4, Anyone?
  160. interstage transformer
  161. Are matched sets important for this amp?
  162. What to do with ECC88's?
  163. EL38's ?
  164. Cables/tubes for Valve Amp
  165. 8233 / E55L Applications
  166. amplimo budget outputtransformer
  167. Output Transformers for WE-437a WOT Line Preamp
  168. plate resistor, input lead
  169. KT88 PP with Class-A/Class-AB switch
  170. very loud preamp
  171. Pentode current sink
  172. Hammond vs. James?
  173. Tubes for Scott Nixon dac
  174. James SE OPT for 300B & 2A3 on eBay
  175. pre-amp with 6as7??
  176. pre-amp with voltage gain from transformer only
  177. Help! Mystery tube (?) amp (type: HK56)
  178. Regulate the high voltage making better sound? (Preamp)
  179. Power Transformer
  180. Potentiometers UK
  181. AC 120V, neutral, hot, ground
  182. Counterpoint SA-220 Tube section advice needed
  183. 807 Amp
  184. Help me to choose the adequate ferrites
  185. Looking for KT88 circuits.
  186. Building a power amp - help
  187. Sovtek EL34WXT.
  188. Microphonic
  189. preamp gain and output transformer question
  190. Would an s5 K-12M kit suffice?
  191. 6c45 and passive volume control?
  192. Something of Interest to Newbies
  193. Chinese Tube Amp & DIY .. Pro & Con
  194. Franks Ultimate Preamp....
  195. Interstage Transformer Nomenclature
  196. PP or SE for Horns?
  197. Output transformer in SIMetrix?
  198. seampcad
  199. Looking for an amp project
  200. Unison Research Smart 845 schematics
  201. HELP - From the audiophile Heads - Amp Advice
  202. 8233, 8116 &amp; 6BZ6 valves - what are they good for?
  203. wires of output transformer are too thin!
  204. Reichert Feral Eye
  205. BIG LOUD SCREECH on LEFT channel only
  206. humming from volume
  207. Paia TubeHead and Symmetry Trims
  208. Output trafo for WE-91 L'Audiophile amp?
  209. Transformer voltage too high for 300B amp
  210. More shopping help please - GE Combo 330
  211. Bias filtering
  212. PP pentode screen supply
  213. 6v6 and OPT with 10-12k ohm(primary impedence)
  214. Identity Help - Is it worth working on
  215. Need info about 5G84 tube
  216. RF Noise in Power Supply
  217. My audionote Kit one have problem on 300B cathode terminal
  218. Partial Feedback Amplifiers
  219. filament transformer vs plate transformer
  220. Any subs for 6N1 & 6N2 twin triode valves?
  221. PSU questions
  222. Any designs for 6EJ7 out there?
  223. SRPP headphoneamp with E88CC
  224. newbie to DIY
  225. Just bought a leak stereo 20 (pics!)
  226. Mysterious Output Transformer....
  227. Hum free 5687 AC filament supply, is it possable ?
  228. Will This Preamp Work
  229. help with input pot on el84 PP amp
  230. NOS Philmore Output Transformern or Modern
  231. tube amp
  232. power supply, Help please!!!
  233. Tubes and magnetic fields
  234. Driver tube for 45 interstage 1:1
  235. 89 db is it enough ?
  236. Troubl-shooting heater voltage for filament
  237. arcing in rectifier tube
  238. 1/8" Aluminum for top plate?
  239. Shopping list
  240. 6sn7 valves
  241. Neon flashes with the music
  242. Help in SE 807 amp
  243. naim user defects to valves !
  244. tamura opt need help
  245. Line stage question
  246. Tube question, how to read the difference.
  247. What Tube amp for Biginner?
  248. Leak Stereo 20 rebuild/restore question
  249. Is there any advantage in using preamp tubes in output stages ??
  250. 12b4 as PP output tubes

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