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  1. Peculiar Sovtek EL34 bevaviour
  2. 5AS4 sub for 5U4
  3. Preamp hum again
  4. Modifying amp to accept different tubes (Newbie alert!)
  5. Quetion for Thorsten
  6. OPT axis
  7. Schematic Counterpoint SA3.1 and SA-9
  8. optimizing constant current heater supply
  9. Valve Art KT100
  10. baxandall tone control
  11. Kofi Annan in: "Brownin' Out!"
  12. strange tube
  13. Monarch SA-30 Schematic
  14. Power Supply for 300B Monoblock
  15. Matisse Line Amp
  16. Panel mounting on a woode case
  17. Hardware??
  18. another way to turn a pentode or tetrode into a triode
  19. 0Z4 as a rectifier?
  20. Unused HV windings on power transformer
  21. Mundorf M-Lytic and Silver-in-Oil Capacitors
  22. grainy preamp gain
  23. Need help with PS for 1626 "Darling" amp
  24. questions about power supply for 6l6 pp
  25. Proof that demagnetizing tubes works
  26. ECC88/5687/2A3 amp voltages
  27. What can I do with these? (tube and OPT question)
  28. Blowing fuses
  29. questions about transfo
  30. Common Cathode Resistor
  31. Why a Zobel network across OPT primary or secondary?
  32. Morgan Jones "Valve Amplifiers"
  33. Why?
  34. 833 push pull design help
  35. Lamm schematics
  36. Mu Followers -- ressources?
  37. Pennsylvania DIY's
  38. Interstage trans? Yes please!
  39. What's wrong with UL anyway ?
  40. SE amp like mcintosh ?
  41. 300b Push Pull Interstage Tsf
  42. amp stages...
  43. Heater supply recommendation for 6922?
  44. hi-end?
  45. Just a quicky
  46. Question on Mains Transformer
  47. Help! Who is the dirtributors of 6V4/EZ80 and 6H30/6N30?
  48. SE 6AS7 amp question
  49. Timed switch on B+ in power supply, good idea?
  50. Parts Sourcing
  51. Power Supply Question
  52. tube amp kits
  53. in search of a schematic
  54. heater wiring
  55. 5A/152M perfect driver? SPICE?
  56. 12AU7 -> 12BH7 Do I need to change Rp?
  57. Need help understanding transformer impedance ratios and impedance matching
  58. Audio schematics for GU50 ????
  59. 6sn7 & 6sn7GTB
  60. Tube amp schematic - any thoughts?
  61. tube distortion effect.
  62. tube rolling Blue Circle BC 21 preamp
  63. A sorry tale which will make you cry !!!
  64. Variac problems
  65. tubeamp project, weekend timekiller
  66. isolated supply grounding
  67. Car preamp with Aikido
  68. Audio Note M1 potentiometer question
  69. Beginner , tube kit suggestions please
  70. Question on OPT
  71. Telefunken S80 Stereo ECL82 Amp- any comment?
  72. Active crossovers using Tubes
  73. 300BSE power amplifier circuit
  74. tube buffer using 12bz7
  75. "Complete" SE KT88
  76. Output Tube biasing for Toroidal Output Transformer
  77. Cardas Golden Capacitors
  78. Tube Buffer for CD-PRO2M (6922)
  79. Troubleshooting fuse blowing
  80. Billington valves and quallity
  81. Regulated PSU, your comments please.
  82. Change coupling cap from .47uf to 2.2uf
  83. RIAA Schematics?
  84. Line out for subwoofer in tube amps
  85. Feedback in IT coupled amps?
  86. Filemant Voltage
  87. DC compensated SE output transformer
  88. Winding an audio transformer
  89. Tube effects Loop Schematics... ?
  90. KT100...what's this ??
  91. Help measuring output impedience
  92. tubes
  93. Need PP KT-88 amp design and KT-88 for triode use?
  94. 7241 tube
  95. Max B+ for 807 UL?
  96. Problem with my Darling!
  97. Effect of cross-coupled "local" FB on plate load of previous stage
  98. DC coupled long tailed pairs
  99. I need an advice for these tubes..
  100. Anode Resistors on PPP Amps
  101. help with modifing a H/K A500 amp
  102. Damper Diode Musings
  103. Heater Question
  104. Push pull designs.
  105. Anybody heard about Tarzian Silicon Rectifier for Tube Rectifier Replacement?
  106. Voice of Music 555 phonograph
  107. Direct driving of GM70 by one ECL86 ???
  108. Bogen amp schematic
  109. 6336a
  110. Power transformer colors & wiring
  111. Stepped Attenuator and Selector Switch
  112. Music without speakers? Need help.
  113. el84 ultra linear datat sheet
  114. 2a3 layout
  115. Matisse Ref per amp
  116. Recommendations for Simple SET Amp Topologies
  117. HV power supply repair
  118. Grundig Model 3265U Restore?
  119. Valve Art EL 156!
  120. Classe A 6550 40W
  121. Lafayette Bypass Option
  122. Plate curves or Op Point for 6KN8?
  123. 12e1 sub for 807 ?
  124. Extremely low power and low loss transformers
  125. looking for power supply diagram SE 813 45 Watt
  126. How to make this 6C33C better??
  127. All octal 6AS7 PP amp is it possible?
  128. Toroids VS EI Transfomers
  129. Bias secrets for a HH Scott 233?!?
  130. new idea of DHT heater supply
  131. Eastern Audio transformers: any good?
  132. UL40-S2 schematic
  133. Tube monster amplifier
  134. Big pentode help!
  135. which one?
  136. system matching
  137. a 5ar4 problem
  138. coupling capacitor intermediate values
  139. Quicksilver Mono 60 upgrades
  140. Can anything be done
  141. OTL ECC88 amp
  142. Bridging Mono Blocks
  143. Cathode-coupled Phase Splitter Formula
  144. Drd 45, 300b
  145. SV572-30: Opinions?
  146. Poor man's transformer volume control?
  147. Output current of this CAT SL-1 schematic ?
  148. Fixed Bias Circuit for 300B
  149. want to build SE450TL
  150. Tubes lifetime and sound
  151. Heater supply problem?
  152. Lowering HV secondary on Power Transformer
  153. Van der Veen 70W tube Amp DIY
  154. 5751 for marantz 7 linestage
  155. To be or not to be, UL or quad?
  156. Tube Failure
  157. 12AX7 Compared!
  158. transformer case grounding
  159. pre/amplifier grounding
  160. First Time Amp
  161. 6ck4 pp amp
  162. JJ electros, any good?
  163. fun with amps
  164. Newbie needs clarification
  165. looking for powerful Single Ended diagram.
  166. Power amp output newbie question
  167. SE ultralinear amplifier generate a lot of Odd harmonics ?
  168. Grounding Filament CT?
  169. one more 12B4A preamp
  170. 6V6PP -> 6L6 PP with triode connection.
  171. ? about powering a sub with a Fisher 30a mono amp.
  172. Pin out conversion 6V6-6AQ5A
  173. 211
  174. Nice looking rectifier tubes help
  175. Stepped attenuator inquiry
  176. Designing a Phonostage with the S&B 10K LCR RIAA Module
  177. 211 tube
  178. The T-Rex SET Amplifier DIY project
  179. Strange Wiring in Bogen 6v6 PP
  180. 6AS7 amp schematics
  181. Blue glow confused :(
  182. 6V6 SE and Screen Grid Voltage
  183. 6BQ5 <-> 6V6 without socket job...Any Idea?
  184. Melbourne, Australia valve enthusiasts check in!
  185. HELP! Blown R + HIGH V!
  186. PCB Pad Layout for B9A Noval
  187. DIY tube amps - help??
  188. New home made S.E amps
  189. Amplifier Oscillation
  190. First project, need guidance
  191. Cap max value after 6X5GT/EZ35 rectifier?
  192. Any tube-heads in Scotland?
  193. Care and Feeding of Tube Pins / Sockets
  194. MFA Luminescence--need schematic
  195. Tube technology amplifier
  196. Transformer questions
  197. Siemens C3g headamp problem
  198. rca83 hash?
  199. Skyline SK-10 Amplifier info?
  200. Tube Stereo Consoles from Thrift Stores
  201. Aikido amp theoretical questions
  202. 6V6 Single and 12AT7 SRPP
  203. What 45 SET amp should I build?
  204. Ping. Burnedfingers...
  205. ? problem with www.ampwares.com ?
  206. Pentode spud...?
  207. Type 46 as voltage amplifier
  208. Tube compressor problem!
  209. Using the 83
  210. Organ amp project
  211. Any feedback on these trannies?
  212. 300B PP bias and expected life time
  213. Mono block restoration
  214. Question about cathode bypass capacitor
  215. www.diytube.com Kits
  216. need help!
  217. Need opinion on PS for tube preamp.
  218. Stanley Mullard
  219. 6AK4, Anyone?
  220. interstage transformer
  221. Are matched sets important for this amp?
  222. What to do with ECC88's?
  223. EL38's ?
  224. Cables/tubes for Valve Amp
  225. 8233 / E55L Applications
  226. amplimo budget outputtransformer
  227. Output Transformers for WE-437a WOT Line Preamp
  228. plate resistor, input lead
  229. KT88 PP with Class-A/Class-AB switch
  230. very loud preamp
  231. Pentode current sink
  232. Hammond vs. James?
  233. Tubes for Scott Nixon dac
  234. James SE OPT for 300B & 2A3 on eBay
  235. pre-amp with 6as7??
  236. pre-amp with voltage gain from transformer only
  237. Help! Mystery tube (?) amp (type: HK56)
  238. Regulate the high voltage making better sound? (Preamp)
  239. Power Transformer
  240. Potentiometers UK
  241. AC 120V, neutral, hot, ground
  242. Counterpoint SA-220 Tube section advice needed
  243. 807 Amp
  244. Help me to choose the adequate ferrites
  245. Looking for KT88 circuits.
  246. Building a power amp - help
  247. Sovtek EL34WXT.
  248. Microphonic
  249. preamp gain and output transformer question
  250. Would an s5 K-12M kit suffice?

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