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  1. ECC88/5687/2A3 amp voltages
  2. What can I do with these? (tube and OPT question)
  3. Blowing fuses
  4. questions about transfo
  5. Common Cathode Resistor
  6. Why a Zobel network across OPT primary or secondary?
  7. Morgan Jones "Valve Amplifiers"
  8. Why?
  9. 833 push pull design help
  10. Lamm schematics
  11. Mu Followers -- ressources?
  12. Pennsylvania DIY's
  13. Interstage trans? Yes please!
  14. What's wrong with UL anyway ?
  15. SE amp like mcintosh ?
  16. 300b Push Pull Interstage Tsf
  17. amp stages...
  18. Heater supply recommendation for 6922?
  19. hi-end?
  20. Just a quicky
  21. Question on Mains Transformer
  22. Help! Who is the dirtributors of 6V4/EZ80 and 6H30/6N30?
  23. SE 6AS7 amp question
  24. Timed switch on B+ in power supply, good idea?
  25. Parts Sourcing
  26. Power Supply Question
  27. tube amp kits
  28. in search of a schematic
  29. heater wiring
  30. 5A/152M perfect driver? SPICE?
  31. 12AU7 -> 12BH7 Do I need to change Rp?
  32. Need help understanding transformer impedance ratios and impedance matching
  33. Audio schematics for GU50 ????
  34. 6sn7 & 6sn7GTB
  35. Tube amp schematic - any thoughts?
  36. tube distortion effect.
  37. tube rolling Blue Circle BC 21 preamp
  38. A sorry tale which will make you cry !!!
  39. Variac problems
  40. tubeamp project, weekend timekiller
  41. isolated supply grounding
  42. Car preamp with Aikido
  43. Audio Note M1 potentiometer question
  44. Beginner , tube kit suggestions please
  45. anyone ever used metalized polypropylene caps from Digi-key?
  46. Question on OPT
  47. Telefunken S80 Stereo ECL82 Amp- any comment?
  48. Active crossovers using Tubes
  49. 300BSE power amplifier circuit
  50. tube buffer using 12bz7
  51. "Complete" SE KT88
  52. Output Tube biasing for Toroidal Output Transformer
  53. Cardas Golden Capacitors
  54. Tube Buffer for CD-PRO2M (6922)
  55. Troubleshooting fuse blowing
  56. Billington valves and quallity
  57. Regulated PSU, your comments please.
  58. Change coupling cap from .47uf to 2.2uf
  59. RIAA Schematics?
  60. Line out for subwoofer in tube amps
  61. Feedback in IT coupled amps?
  62. Filemant Voltage
  63. DC compensated SE output transformer
  64. Winding an audio transformer
  65. Tube effects Loop Schematics... ?
  66. Scrap Heathkit W-5m for guitar amp?
  67. KT100...what's this ??
  68. Help measuring output impedience
  69. tubes
  70. Need PP KT-88 amp design and KT-88 for triode use?
  71. 7241 tube
  72. Max B+ for 807 UL?
  73. Fender amplifier.. burnt choke ??
  74. Problem with my Darling!
  75. Effect of cross-coupled "local" FB on plate load of previous stage
  76. wickedly awsome guitar amp
  77. DC coupled long tailed pairs
  78. I need an advice for these tubes..
  79. Anode Resistors on PPP Amps
  80. help with modifing a H/K A500 amp
  81. Damper Diode Musings
  82. Heater Question
  83. Push pull designs.
  84. Anybody heard about Tarzian Silicon Rectifier for Tube Rectifier Replacement?
  85. Voice of Music 555 phonograph
  86. Direct driving of GM70 by one ECL86 ???
  87. Bogen amp schematic
  88. 6336a
  89. Power transformer colors & wiring
  90. Stepped Attenuator and Selector Switch
  91. Music without speakers? Need help.
  92. el84 ultra linear datat sheet
  93. 2a3 layout
  94. Matisse Ref per amp
  95. Recommendations for Simple SET Amp Topologies
  96. HV power supply repair
  97. Grundig Model 3265U Restore?
  98. Valve Art EL 156!
  99. Classe A 6550 40W
  100. Lafayette Bypass Option
  101. Plate curves or Op Point for 6KN8?
  102. 12e1 sub for 807 ?
  103. Extremely low power and low loss transformers
  104. looking for power supply diagram SE 813 45 Watt
  105. How to make this 6C33C better??
  106. All octal 6AS7 PP amp is it possible?
  107. Toroids VS EI Transfomers
  108. Bias secrets for a HH Scott 233?!?
  109. new idea of DHT heater supply
  110. Eastern Audio transformers: any good?
  111. UL40-S2 schematic
  112. Tube monster amplifier
  113. Big pentode help!
  114. which one?
  115. system matching
  116. a 5ar4 problem
  117. coupling capacitor intermediate values
  118. Quicksilver Mono 60 upgrades
  119. Can anything be done
  120. OTL ECC88 amp
  121. Bridging Mono Blocks
  122. Cathode-coupled Phase Splitter Formula
  123. Drd 45, 300b
  124. SV572-30: Opinions?
  125. Poor man's transformer volume control?
  126. Output current of this CAT SL-1 schematic ?
  127. Fixed Bias Circuit for 300B
  128. want to build SE450TL
  129. Tubes lifetime and sound
  130. Heater supply problem?
  131. Lowering HV secondary on Power Transformer
  132. Van der Veen 70W tube Amp DIY
  133. 5751 for marantz 7 linestage
  134. To be or not to be, UL or quad?
  135. Tube Failure
  136. 12AX7 Compared!
  137. transformer case grounding
  138. pre/amplifier grounding
  139. First Time Amp
  140. 6ck4 pp amp
  141. JJ electros, any good?
  142. 6AQ5A guitar amp revisited
  143. fun with amps
  144. Newbie needs clarification
  145. looking for powerful Single Ended diagram.
  146. Power amp output newbie question
  147. SE ultralinear amplifier generate a lot of Odd harmonics ?
  148. Grounding Filament CT?
  149. one more 12B4A preamp
  150. 6V6PP -> 6L6 PP with triode connection.
  151. ? about powering a sub with a Fisher 30a mono amp.
  152. Will This Blow Up?
  153. Pin out conversion 6V6-6AQ5A
  154. 211
  155. Nice looking rectifier tubes help
  156. Stepped attenuator inquiry
  157. Designing a Phonostage with the S&B 10K LCR RIAA Module
  158. 211 tube
  159. The T-Rex SET Amplifier DIY project
  160. Strange Wiring in Bogen 6v6 PP
  161. 6AS7 amp schematics
  162. Blue glow confused :(
  163. 6V6 SE and Screen Grid Voltage
  164. 6BQ5 <-> 6V6 without socket job...Any Idea?
  165. Melbourne, Australia valve enthusiasts check in!
  166. HELP! Blown R + HIGH V!
  167. PCB Pad Layout for B9A Noval
  168. DIY tube amps - help??
  169. New home made S.E amps
  170. Amplifier Oscillation
  171. First project, need guidance
  172. Cap max value after 6X5GT/EZ35 rectifier?
  173. Any tube-heads in Scotland?
  174. Care and Feeding of Tube Pins / Sockets
  175. MFA Luminescence--need schematic
  176. Tube technology amplifier
  177. Transformer questions
  178. Siemens C3g headamp problem
  179. rca83 hash?
  180. Skyline SK-10 Amplifier info?
  181. Tube Stereo Consoles from Thrift Stores
  182. Aikido amp theoretical questions
  183. 6V6 Single and 12AT7 SRPP
  184. What 45 SET amp should I build?
  185. Ping. Burnedfingers...
  186. ? problem with www.ampwares.com ?
  187. Pentode spud...?
  188. Type 46 as voltage amplifier
  189. Tube compressor problem!
  190. Using the 83
  191. Organ amp project
  192. Any feedback on these trannies?
  193. 300B PP bias and expected life time
  194. Mono block restoration
  195. Question about cathode bypass capacitor
  196. www.diytube.com Kits
  197. need help!
  198. Need opinion on PS for tube preamp.
  199. Stanley Mullard
  200. 6AK4, Anyone?
  201. interstage transformer
  202. Are matched sets important for this amp?
  203. What to do with ECC88's?
  204. EL38's ?
  205. Cables/tubes for Valve Amp
  206. 8233 / E55L Applications
  207. amplimo budget outputtransformer
  208. Output Transformers for WE-437a WOT Line Preamp
  209. plate resistor, input lead
  210. KT88 PP with Class-A/Class-AB switch
  211. very loud preamp
  212. Pentode current sink
  213. Hammond vs. James?
  214. Tubes for Scott Nixon dac
  215. James SE OPT for 300B & 2A3 on eBay
  216. pre-amp with 6as7??
  217. pre-amp with voltage gain from transformer only
  218. Help! Mystery tube (?) amp (type: HK56)
  219. Regulate the high voltage making better sound? (Preamp)
  220. Power Transformer
  221. Potentiometers UK
  222. AC 120V, neutral, hot, ground
  223. Counterpoint SA-220 Tube section advice needed
  224. 807 Amp
  225. Help me to choose the adequate ferrites
  226. Looking for KT88 circuits.
  227. Building a power amp - help
  228. Sovtek EL34WXT.
  229. Microphonic
  230. preamp gain and output transformer question
  231. Would an s5 K-12M kit suffice?
  232. 6c45 and passive volume control?
  233. Something of Interest to Newbies
  234. Fender Output transformer as an audio amp part
  235. Chinese Tube Amp & DIY .. Pro & Con
  236. Franks Ultimate Preamp....
  237. Interstage Transformer Nomenclature
  238. PP or SE for Horns?
  239. Output transformer in SIMetrix?
  240. seampcad
  241. Looking for an amp project
  242. Unison Research Smart 845 schematics
  243. 8233, 8116 &amp; 6BZ6 valves - what are they good for?
  244. HELP - From the audiophile Heads - Amp Advice
  245. wires of output transformer are too thin!
  246. Reichert Feral Eye
  247. BIG LOUD SCREECH on LEFT channel only
  248. humming from volume
  249. Paia TubeHead and Symmetry Trims
  250. Output trafo for WE-91 L'Audiophile amp?

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