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  1. RIAA help
  2. Advise for my first tube amplifier, please
  3. My 50/10Y amp with hybrid PSU... am I doing the standby switch right?
  4. What can I build with this iron?
  5. Hey Planet_10 (and others)
  6. Tube sockets for Harmon-K Citation II
  7. Seeking a source for Mundorf M-caps.
  8. Question on ZZ-1000/8228
  9. noise analysis
  10. Using latching signal relay in SE guitar amp.
  11. Help wanted with fixing french DRG valve preamp....
  12. How hot are they supposed to get?
  13. EF86 Triode Mode
  14. Using a 6SL7 in a tube overdrive pedal instead of 12AX7?
  15. Guitar Amp Question!!!!! Adding Film Cap?
  16. naive questions
  17. Rozenblits Grounded grid preamp layout
  18. Help extend the life of my 805's
  19. Difference between 5687, 5687WA and 5687WB tubes?
  20. The first tube "integrated circuit" (1926)
  21. Fix loose connection in base with solder pot?
  22. 91a 300b conversion to 2a3
  23. Adams Amp Discussion, please help! :)
  24. Had a bad accident with my TT21 today.
  25. Different sound for CD Tube Player
  26. Tube audio transformer
  27. Hybrid Srpp
  28. "it is just SO hard to get bad sound from EL84 PP amp"
  29. Wire types??
  30. triode vs. pentode for pp output.
  31. 6GK5 vs. EC95/6ER5
  32. 25BQ6GTB?? Any Good?
  33. do pp output tubes have to be matched?
  34. Ampex 600 pre
  35. line-stage preamp tubes? which ones to use...
  36. Another timekiller project
  37. 6sn7GT
  38. problem with EL84 PP amp
  39. a speaker whose load varies too much for an OTL
  40. Mystery manufacturer/distributor
  41. 37s Anyone?
  42. sv811-10 push pull
  43. 416B dangerous tube?
  44. blew my amp because of distortion pedal
  45. Help with Tube Phono Output Impedance
  46. Minimum current for choke operation
  47. stored energy in output transformer?
  48. socket mounting depth
  49. Parafeeding a push pull
  50. Different direct heating styles?
  51. The most simple tube preamp
  52. Sample/hold DC servo circuit
  53. Interstage transformer as OPT?
  54. What can you do with cheap 1kV power?
  55. Marshall Super Lead MkII
  56. Flashing Rectifier Tube- Bad Thing?
  57. Amp for my speakers, PLEASE Help
  58. suitable preamp for a tube amp (kt88+12ax7)
  59. anyone know of a kit to make tube night light?
  60. Sprague capasitor id
  61. Question on Tango XE-20S
  62. 6SL7 diff pair - how to set up????
  63. Hwat should be the best driver for a 520V2 ?
  64. problem: half power on push-pull ?
  65. Screen voltage - standby cut (Roland Bolt 60)
  66. Triode Dick/FdeGrove 2A3 PP amplifier
  67. PSU for perusal
  68. Kt66 Gec Replica
  69. 6as7
  70. Please confirm my transformer math.
  71. Anything wrong with this design?
  72. Buffer Line Pre-Amp Power Tx
  73. Why filter in tube DAC?
  74. advances in tube amp design?
  75. How to determine grid leak current?
  76. dissimilar triode for White cathode follower?
  77. tube rectifier
  78. 6Vdc from 6,3Vac
  79. Computer Grade Cap or Inverter Grade Cap???
  80. Peculiar Sovtek EL34 bevaviour
  81. 5AS4 sub for 5U4
  82. Preamp hum again
  83. Modifying amp to accept different tubes (Newbie alert!)
  84. Quetion for Thorsten
  85. OPT axis
  86. Schematic Counterpoint SA3.1 and SA-9
  87. optimizing constant current heater supply
  88. Valve Art KT100
  89. baxandall tone control
  90. Kofi Annan in: "Brownin' Out!"
  91. strange tube
  92. Monarch SA-30 Schematic
  93. Power Supply for 300B Monoblock
  94. Matisse Line Amp
  95. Panel mounting on a woode case
  96. Hardware??
  97. another way to turn a pentode or tetrode into a triode
  98. 0Z4 as a rectifier?
  99. Unused HV windings on power transformer
  100. Mundorf M-Lytic and Silver-in-Oil Capacitors
  101. grainy preamp gain
  102. Need help with PS for 1626 "Darling" amp
  103. questions about power supply for 6l6 pp
  104. Proof that demagnetizing tubes works
  105. ECC88/5687/2A3 amp voltages
  106. What can I do with these? (tube and OPT question)
  107. Blowing fuses
  108. questions about transfo
  109. Common Cathode Resistor
  110. Why a Zobel network across OPT primary or secondary?
  111. Morgan Jones "Valve Amplifiers"
  112. Why?
  113. 833 push pull design help
  114. Lamm schematics
  115. Mu Followers -- ressources?
  116. Pennsylvania DIY's
  117. Interstage trans? Yes please!
  118. What's wrong with UL anyway ?
  119. SE amp like mcintosh ?
  120. 300b Push Pull Interstage Tsf
  121. amp stages...
  122. Heater supply recommendation for 6922?
  123. hi-end?
  124. Just a quicky
  125. Question on Mains Transformer
  126. Help! Who is the dirtributors of 6V4/EZ80 and 6H30/6N30?
  127. SE 6AS7 amp question
  128. Timed switch on B+ in power supply, good idea?
  129. Parts Sourcing
  130. Power Supply Question
  131. tube amp kits
  132. in search of a schematic
  133. heater wiring
  134. 5A/152M perfect driver? SPICE?
  135. 12AU7 -> 12BH7 Do I need to change Rp?
  136. Need help understanding transformer impedance ratios and impedance matching
  137. Audio schematics for GU50 ????
  138. 6sn7 & 6sn7GTB
  139. Tube amp schematic - any thoughts?
  140. tube distortion effect.
  141. tube rolling Blue Circle BC 21 preamp
  142. A sorry tale which will make you cry !!!
  143. Variac problems
  144. tubeamp project, weekend timekiller
  145. isolated supply grounding
  146. Car preamp with Aikido
  147. Audio Note M1 potentiometer question
  148. Beginner , tube kit suggestions please
  149. anyone ever used metalized polypropylene caps from Digi-key?
  150. Question on OPT
  151. Telefunken S80 Stereo ECL82 Amp- any comment?
  152. Active crossovers using Tubes
  153. 300BSE power amplifier circuit
  154. tube buffer using 12bz7
  155. "Complete" SE KT88
  156. Output Tube biasing for Toroidal Output Transformer
  157. Cardas Golden Capacitors
  158. Tube Buffer for CD-PRO2M (6922)
  159. Troubleshooting fuse blowing
  160. Billington valves and quallity
  161. Regulated PSU, your comments please.
  162. Change coupling cap from .47uf to 2.2uf
  163. RIAA Schematics?
  164. Line out for subwoofer in tube amps
  165. Feedback in IT coupled amps?
  166. Filemant Voltage
  167. DC compensated SE output transformer
  168. Winding an audio transformer
  169. Tube effects Loop Schematics... ?
  170. Scrap Heathkit W-5m for guitar amp?
  171. KT100...what's this ??
  172. Help measuring output impedience
  173. tubes
  174. Need PP KT-88 amp design and KT-88 for triode use?
  175. 7241 tube
  176. Max B+ for 807 UL?
  177. Fender amplifier.. burnt choke ??
  178. Problem with my Darling!
  179. Effect of cross-coupled "local" FB on plate load of previous stage
  180. wickedly awsome guitar amp
  181. DC coupled long tailed pairs
  182. I need an advice for these tubes..
  183. Anode Resistors on PPP Amps
  184. help with modifing a H/K A500 amp
  185. Damper Diode Musings
  186. Heater Question
  187. Push pull designs.
  188. Anybody heard about Tarzian Silicon Rectifier for Tube Rectifier Replacement?
  189. Voice of Music 555 phonograph
  190. Direct driving of GM70 by one ECL86 ???
  191. Bogen amp schematic
  192. 6336a
  193. Power transformer colors & wiring
  194. Stepped Attenuator and Selector Switch
  195. Music without speakers? Need help.
  196. el84 ultra linear datat sheet
  197. 2a3 layout
  198. Matisse Ref per amp
  199. Recommendations for Simple SET Amp Topologies
  200. HV power supply repair
  201. Grundig Model 3265U Restore?
  202. Valve Art EL 156!
  203. Classe A 6550 40W
  204. Lafayette Bypass Option
  205. Plate curves or Op Point for 6KN8?
  206. 12e1 sub for 807 ?
  207. Extremely low power and low loss transformers
  208. looking for power supply diagram SE 813 45 Watt
  209. How to make this 6C33C better??
  210. All octal 6AS7 PP amp is it possible?
  211. Toroids VS EI Transfomers
  212. Bias secrets for a HH Scott 233?!?
  213. new idea of DHT heater supply
  214. UL40-S2 schematic
  215. Eastern Audio transformers: any good?
  216. Tube monster amplifier
  217. Big pentode help!
  218. which one?
  219. system matching
  220. a 5ar4 problem
  221. coupling capacitor intermediate values
  222. Quicksilver Mono 60 upgrades
  223. Can anything be done
  224. OTL ECC88 amp
  225. Bridging Mono Blocks
  226. Cathode-coupled Phase Splitter Formula
  227. Drd 45, 300b
  228. SV572-30: Opinions?
  229. Poor man's transformer volume control?
  230. Output current of this CAT SL-1 schematic ?
  231. Fixed Bias Circuit for 300B
  232. want to build SE450TL
  233. Tubes lifetime and sound
  234. Heater supply problem?
  235. Lowering HV secondary on Power Transformer
  236. Van der Veen 70W tube Amp DIY
  237. 5751 for marantz 7 linestage
  238. To be or not to be, UL or quad?
  239. Tube Failure
  240. 12AX7 Compared!
  241. transformer case grounding
  242. pre/amplifier grounding
  243. First Time Amp
  244. 6ck4 pp amp
  245. JJ electros, any good?
  246. 6AQ5A guitar amp revisited
  247. fun with amps
  248. Newbie needs clarification
  249. looking for powerful Single Ended diagram.
  250. Power amp output newbie question

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