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

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