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  1. line-stage preamp tubes? which ones to use...
  2. Another timekiller project
  3. 6sn7GT
  4. problem with EL84 PP amp
  5. a speaker whose load varies too much for an OTL
  6. Mystery manufacturer/distributor
  7. 37s Anyone?
  8. sv811-10 push pull
  9. 416B dangerous tube?
  10. blew my amp because of distortion pedal
  11. Help with Tube Phono Output Impedance
  12. Minimum current for choke operation
  13. stored energy in output transformer?
  14. socket mounting depth
  15. Parafeeding a push pull
  16. Different direct heating styles?
  17. The most simple tube preamp
  18. Sample/hold DC servo circuit
  19. Interstage transformer as OPT?
  20. What can you do with cheap 1kV power?
  21. Marshall Super Lead MkII
  22. Flashing Rectifier Tube- Bad Thing?
  23. Amp for my speakers, PLEASE Help
  24. suitable preamp for a tube amp (kt88+12ax7)
  25. anyone know of a kit to make tube night light?
  26. Sprague capasitor id
  27. Question on Tango XE-20S
  28. 6SL7 diff pair - how to set up????
  29. Hwat should be the best driver for a 520V2 ?
  30. problem: half power on push-pull ?
  31. Screen voltage - standby cut (Roland Bolt 60)
  32. Triode Dick/FdeGrove 2A3 PP amplifier
  33. PSU for perusal
  34. Kt66 Gec Replica
  35. 6as7
  36. Please confirm my transformer math.
  37. Anything wrong with this design?
  38. Buffer Line Pre-Amp Power Tx
  39. Why filter in tube DAC?
  40. advances in tube amp design?
  41. How to determine grid leak current?
  42. dissimilar triode for White cathode follower?
  43. tube rectifier
  44. 6Vdc from 6,3Vac
  45. Computer Grade Cap or Inverter Grade Cap???
  46. Peculiar Sovtek EL34 bevaviour
  47. 5AS4 sub for 5U4
  48. Preamp hum again
  49. Modifying amp to accept different tubes (Newbie alert!)
  50. Quetion for Thorsten
  51. OPT axis
  52. Schematic Counterpoint SA3.1 and SA-9
  53. optimizing constant current heater supply
  54. Valve Art KT100
  55. baxandall tone control
  56. Kofi Annan in: "Brownin' Out!"
  57. strange tube
  58. Monarch SA-30 Schematic
  59. Power Supply for 300B Monoblock
  60. Matisse Line Amp
  61. Panel mounting on a woode case
  62. Hardware??
  63. another way to turn a pentode or tetrode into a triode
  64. 0Z4 as a rectifier?
  65. Unused HV windings on power transformer
  66. Mundorf M-Lytic and Silver-in-Oil Capacitors
  67. grainy preamp gain
  68. Need help with PS for 1626 "Darling" amp
  69. questions about power supply for 6l6 pp
  70. Proof that demagnetizing tubes works
  71. ECC88/5687/2A3 amp voltages
  72. What can I do with these? (tube and OPT question)
  73. Blowing fuses
  74. questions about transfo
  75. Common Cathode Resistor
  76. Why a Zobel network across OPT primary or secondary?
  77. Morgan Jones "Valve Amplifiers"
  78. Why?
  79. 833 push pull design help
  80. Lamm schematics
  81. Mu Followers -- ressources?
  82. Pennsylvania DIY's
  83. Interstage trans? Yes please!
  84. What's wrong with UL anyway ?
  85. SE amp like mcintosh ?
  86. 300b Push Pull Interstage Tsf
  87. amp stages...
  88. Heater supply recommendation for 6922?
  89. hi-end?
  90. Just a quicky
  91. Question on Mains Transformer
  92. Help! Who is the dirtributors of 6V4/EZ80 and 6H30/6N30?
  93. SE 6AS7 amp question
  94. Timed switch on B+ in power supply, good idea?
  95. Parts Sourcing
  96. Power Supply Question
  97. tube amp kits
  98. in search of a schematic
  99. heater wiring
  100. 5A/152M perfect driver? SPICE?
  101. 12AU7 -> 12BH7 Do I need to change Rp?
  102. Need help understanding transformer impedance ratios and impedance matching
  103. Audio schematics for GU50 ????
  104. 6sn7 & 6sn7GTB
  105. Tube amp schematic - any thoughts?
  106. tube distortion effect.
  107. tube rolling Blue Circle BC 21 preamp
  108. A sorry tale which will make you cry !!!
  109. Variac problems
  110. tubeamp project, weekend timekiller
  111. isolated supply grounding
  112. Car preamp with Aikido
  113. Audio Note M1 potentiometer question
  114. Beginner , tube kit suggestions please
  115. anyone ever used metalized polypropylene caps from Digi-key?
  116. Question on OPT
  117. Telefunken S80 Stereo ECL82 Amp- any comment?
  118. Active crossovers using Tubes
  119. 300BSE power amplifier circuit
  120. tube buffer using 12bz7
  121. "Complete" SE KT88
  122. Output Tube biasing for Toroidal Output Transformer
  123. Cardas Golden Capacitors
  124. Tube Buffer for CD-PRO2M (6922)
  125. Troubleshooting fuse blowing
  126. Billington valves and quallity
  127. Regulated PSU, your comments please.
  128. Change coupling cap from .47uf to 2.2uf
  129. RIAA Schematics?
  130. Line out for subwoofer in tube amps
  131. Feedback in IT coupled amps?
  132. Filemant Voltage
  133. DC compensated SE output transformer
  134. Winding an audio transformer
  135. Tube effects Loop Schematics... ?
  136. Scrap Heathkit W-5m for guitar amp?
  137. KT100...what's this ??
  138. Help measuring output impedience
  139. tubes
  140. Need PP KT-88 amp design and KT-88 for triode use?
  141. 7241 tube
  142. Max B+ for 807 UL?
  143. Fender amplifier.. burnt choke ??
  144. Problem with my Darling!
  145. Effect of cross-coupled "local" FB on plate load of previous stage
  146. wickedly awsome guitar amp
  147. DC coupled long tailed pairs
  148. I need an advice for these tubes..
  149. Anode Resistors on PPP Amps
  150. help with modifing a H/K A500 amp
  151. Damper Diode Musings
  152. Heater Question
  153. Push pull designs.
  154. Anybody heard about Tarzian Silicon Rectifier for Tube Rectifier Replacement?
  155. Voice of Music 555 phonograph
  156. Direct driving of GM70 by one ECL86 ???
  157. Bogen amp schematic
  158. 6336a
  159. Power transformer colors & wiring
  160. Stepped Attenuator and Selector Switch
  161. Music without speakers? Need help.
  162. el84 ultra linear datat sheet
  163. 2a3 layout
  164. Matisse Ref per amp
  165. Recommendations for Simple SET Amp Topologies
  166. HV power supply repair
  167. Grundig Model 3265U Restore?
  168. Valve Art EL 156!
  169. Classe A 6550 40W
  170. Lafayette Bypass Option
  171. Plate curves or Op Point for 6KN8?
  172. 12e1 sub for 807 ?
  173. Extremely low power and low loss transformers
  174. looking for power supply diagram SE 813 45 Watt
  175. How to make this 6C33C better??
  176. All octal 6AS7 PP amp is it possible?
  177. Toroids VS EI Transfomers
  178. Bias secrets for a HH Scott 233?!?
  179. new idea of DHT heater supply
  180. Eastern Audio transformers: any good?
  181. UL40-S2 schematic
  182. Tube monster amplifier
  183. Big pentode help!
  184. which one?
  185. system matching
  186. a 5ar4 problem
  187. coupling capacitor intermediate values
  188. Quicksilver Mono 60 upgrades
  189. Can anything be done
  190. OTL ECC88 amp
  191. Bridging Mono Blocks
  192. Cathode-coupled Phase Splitter Formula
  193. Drd 45, 300b
  194. SV572-30: Opinions?
  195. Poor man's transformer volume control?
  196. Output current of this CAT SL-1 schematic ?
  197. Fixed Bias Circuit for 300B
  198. want to build SE450TL
  199. Tubes lifetime and sound
  200. Heater supply problem?
  201. Lowering HV secondary on Power Transformer
  202. Van der Veen 70W tube Amp DIY
  203. 5751 for marantz 7 linestage
  204. To be or not to be, UL or quad?
  205. Tube Failure
  206. 12AX7 Compared!
  207. transformer case grounding
  208. pre/amplifier grounding
  209. First Time Amp
  210. 6ck4 pp amp
  211. JJ electros, any good?
  212. 6AQ5A guitar amp revisited
  213. fun with amps
  214. Newbie needs clarification
  215. looking for powerful Single Ended diagram.
  216. Power amp output newbie question
  217. SE ultralinear amplifier generate a lot of Odd harmonics ?
  218. Grounding Filament CT?
  219. one more 12B4A preamp
  220. 6V6PP -> 6L6 PP with triode connection.
  221. ? about powering a sub with a Fisher 30a mono amp.
  222. Will This Blow Up?
  223. Pin out conversion 6V6-6AQ5A
  224. 211
  225. Nice looking rectifier tubes help
  226. Stepped attenuator inquiry
  227. Designing a Phonostage with the S&B 10K LCR RIAA Module
  228. 211 tube
  229. The T-Rex SET Amplifier DIY project
  230. Strange Wiring in Bogen 6v6 PP
  231. 6AS7 amp schematics
  232. Blue glow confused :(
  233. 6V6 SE and Screen Grid Voltage
  234. 6BQ5 <-> 6V6 without socket job...Any Idea?
  235. Melbourne, Australia valve enthusiasts check in!
  236. HELP! Blown R + HIGH V!
  237. PCB Pad Layout for B9A Noval
  238. DIY tube amps - help??
  239. New home made S.E amps
  240. Amplifier Oscillation
  241. First project, need guidance
  242. Cap max value after 6X5GT/EZ35 rectifier?
  243. Any tube-heads in Scotland?
  244. Care and Feeding of Tube Pins / Sockets
  245. MFA Luminescence--need schematic
  246. Tube technology amplifier
  247. Transformer questions
  248. Siemens C3g headamp problem
  249. rca83 hash?
  250. Skyline SK-10 Amplifier info?

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