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  1. Bogen MO-200A transplant /conversion
  2. 5U4 o bridge rectifier
  3. Choosing the right transformer
  4. V-Cap Help
  5. Older tubes sound better
  6. 6J7 preamp
  7. Menygue mini/music angel amp
  8. Driving a Behringer INuke Nu1000
  9. cathode follower ecc88 on 60volt
  10. Docs for Heathkit AA-23?
  11. 45 tube amp schematic
  12. Old TO-R s15u, Should i fix it?
  13. Tube ID
  14. VTL driver tube question
  15. Fun with junk EL84 SE
  16. Enclosure ideas
  17. Burn in procedure for NOS necessary?
  18. Strange Lorenz ECC81 12AT7
  19. Amplifier first start up; Plays tone of signal generator with no speakers!
  20. Reports of the death of Audiophool have been greatly exaggerated
  21. help me identify some vintage tubes // need suggestions for possible applications!
  22. Lowering cost of audio output transformer
  23. Source for transformers in Europe
  24. morgan Jones HT caps & Anode Loads
  25. Tuning Negative feedback
  26. Hickok reference 6L6 for calibration..
  27. SET-NO FEEDBACK amplifier performance
  28. Stereo class A 6+6W - 2x 6L6G 1 x 6N2P
  29. Console Amplifier Pull:Voltages over Spec
  30. Help! My EL34B based amp arced at full volume.
  31. MUZAK 50's tube amp
  32. Tube break-in?
  33. Custom power tranny specs recommendations for 300B pse monoblocs
  34. mosfet source follower output stage.
  35. Winter upgrade project - new heating unit
  36. 6KM8 amp
  37. Power and output transformers to ground.
  38. Help with this schematic? B+? B++?
  39. What to do with this old amp? suggestions please.
  40. DIY CAT SL1 preamp
  41. Phase inverter, your comments welcomed!
  42. Basic Bias Question for PP Amp
  43. Oddwatt 5751/6550
  44. Please help me to identify Telefunken PCC ...
  45. Modification of 300B SE Amplifier
  46. 300B Tube and Amp Questions
  47. ST70 "Imposter"
  48. cathode follower question
  49. marconi tubes....can someone idntify these
  50. DeathTrap400 : : A Pretty Damn Good 300B Amp
  51. SOS: First Build, Lots of Hum
  52. 1959 Silvertone Syntronic Can Capacitor question
  53. KR Audio Marconi R valve amp?
  54. Distortion
  55. Tung-Sol 6098/6AR6 Substitution
  56. Dropout in RTP3 phono stage
  57. Audio Research EC-3 modification
  58. 300b all-DHT SET
  59. My first tube project !
  60. Trouble with homebuilt amp
  61. Music angel el34b problem
  62. Elecrolytic capacitor reforming
  63. The end of tubes?
  64. Two stages EL34 power amplifier
  65. 7199 replacement in AMPEX 6973
  66. IT coupled tube-SS hybrid amp suggestion- needs development
  67. Original Cary CAD-300se upgrades?
  68. Convert Integrated Tube Preamp to an amplifier
  69. McCurdy AM405 Schematics
  70. Looking for Neumann N149 power supply schematic
  71. B&K model 747 tube tester for EL34
  72. Behringer DEQ2496 for testing amplifiers and preamps frequency response ???
  73. I need datasheet of 8753 tube, help me!
  74. New 6L6GC Project. DC -> LTP
  75. EL84 in UL
  76. 1953 revere amp conversion
  77. Manley transformer specifications
  78. Recommended 300B SE Amplifier Designs
  79. Found a new interstage coupling method (?)
  80. Amplifier Distortion (Northern Electric)
  81. when do filament supplies need to be floated
  82. gm70 filiment transformers
  83. Replacing 6922 Preamp Tube in ARC LS7
  84. Please educate me: Tube testing, the life test, and Grid Leakage
  85. 6AR6 6098 Triode PP Load Line
  86. music reference rm5-4 schematics
  87. S5 K-12G output trans
  88. Transformer center tap question
  89. EF86 + 4*EL84PSE
  90. solid state relays for plate load switching?
  91. Dont have a power transformer?
  92. Kora Equinoxe Triode or Blue Circle BC-21.1 preamp?
  93. Pre-Amp For my Tubelab Simple P-P
  94. Power Transformer Help
  95. Analog Metric 2A3 PP Kit
  96. Good, starter OTL kit
  97. Dual SE amplifier? - (not PSE) - Take two!
  98. Mysterious SE OTL headphone amp from China?!
  99. Inv. Futterman with gain stages between PI and O/P?
  100. PSU configurations for tube amp
  101. HP Model 712b Regulated Power supply
  102. Dynaco low Power Amp
  103. 300b power suply
  104. Very Strange Preamp Issue
  105. WTB: I am looking for a Freed 1400V or Chicago 1200V/1400V Potted Power Transformer
  106. tube transformer suppliers in Mercosur
  107. Please Help: 6CJ3 Damper Diode Tube as Rectifier Question
  108. time delay sophia electric
  109. Twisting the leads of filter choke
  110. This SPUD's 4 U
  111. I am Looking for tubes
  112. Thuan
  113. Nanjing 6V6GT ( 6P6P)
  114. Should I keep this old stuff?
  115. 300b
  116. ganged output transformers
  117. Holco H4P Resistors, Should I use them?
  118. 6BX8 curves, help !
  119. SANSUI AU-70 or 1000A???
  120. General Electric YTW-1 Tube Checker
  121. Ground or amp hum-which?
  122. need help to fix the "hiss" on my tube preamp
  123. Best SE interstage 1:1 for min. 15mA?
  124. Dual Single Ended Amplifier? - (not PSE)
  125. RIP Forum Member "Ivey"
  126. Balanced Buffer Needed with a Balanced Volume Control?
  127. valves to replace opamps in cd player
  128. Replacing capacitors on Audio Research D40 power amp.
  129. No sound and low B+?
  130. Replacing capacitors on Audio Research D40 power amp.
  131. 2 Channel Tube Amp and Sub Connection
  132. EZ125 Amp Project
  133. Yaqin MS-22b Phono Amp
  134. First post and a couple P.P. questions
  135. adding a preamp to tube power amp
  136. 6SN7 6N8S preamp suggestions
  137. 300b polarity
  138. Electrolytic capacitor vs extra triode stage
  139. WE JAN 274B Dating
  140. EICO 666 Tester Help
  141. Hickock 550X signal voltage
  142. First Headphone tube amp kit to build??
  143. Anyone owns a Dynavox VR-307 Amplifier ?
  144. NOS potted Chicago Transformer 1BC-150
  145. capacitor voltage for tube amp power supply
  146. 808 SE Design Help!
  147. Why can't I build my own ARC LS-5 or CJ PV-12?
  148. Post-mortem on a 80 year old 2A3 amp
  149. 6e5p gm70 with 6d22s?
  150. 6L6-6V6-EL34-KT88-6CA7-EL84
  151. Scheme for SE amp
  152. $16,000
  153. Hybrid power amp
  154. Diagnosis please
  155. On now! Jamerson's Ampeg
  156. BK 707 Tube Tester Mods
  157. monarch 614
  158. Separate Filament and B+ Switches
  159. Dynaco Low Power with 12AY7's
  160. PTP kits available?
  161. Which OP transformer and materials?
  162. Power of Tube Amp and Transistors Amp
  163. testing tubes
  164. current servo not voltage.
  165. Help Me, How to make Pre-amp using 12AU7 tube and Op-Amp Ic mix?
  166. 300b filament
  167. DHT SE auto bias circuit
  168. Anyone try swapping 6SN7 w/ 6F8G
  169. Eliminating Cathode Bypass Caps In SET Amplifier
  170. Nano vacuum tube
  171. Help High Line voltage
  172. Switchable Amp Output?
  173. PCB or hardwire?
  174. 27 line pre amplifier
  175. Mystery tubes on FB?
  176. amplifier discussion
  177. Mikael Abdellah KT88 SE with Cornet2
  178. 5879 to 12AX7 conversion
  179. CCDA SE output stage?
  180. Bravo V2 tube headphone amp - high pitched noise?
  181. Preamp Grounding Question
  182. SE on 300B
  183. musical paradise mp 301
  184. Newbie plan
  185. Capacitor Voltage rating Question
  186. Can anybody identify this amp?
  187. Old RCA radio; can anyone ID this?
  188. Class AB2 - Kink, how and why?
  189. 6SL7, 6J5, or 6SN7 unity gain buffer amp
  190. CCDA dissimilar triode preamp
  191. NOS NEGLECTED HIGH-END AUDIO TUBE
  192. GOSS C-core suppliers in UK/Europe
  193. Old radio -> tube amplifier
  194. Sowter 8650 in SE
  195. My Russian SET
  196. Raysonic vs. DIY tube amp?
  197. Which pins to use first?
  198. Bypass gain stage on K16LS amp
  199. Schematic help for a Pilot 505 amp please
  200. Question re: Distortion in triode gain stage
  201. Newbie needs help
  202. Marantz Model 9
  203. Is my power transformer bad?
  204. japanese 6v6 amp on youtube, anyone got the link?
  205. First attempt at tube amp.
  206. 6p3s,6N1P,6j1p
  207. 6bq5 p-p diagnosise
  208. MFA Lumi suddenly whistles (on bench)
  209. Pure tetrode and negative g2
  210. ECC85, EL84 tube amp please help.
  211. Pentode buffer.
  212. 5k:8 ohm vs. 10k:16 ohm output transformer. What is the difference?
  213. Help restoring old Maas-Rowe amp
  214. Early Sansui Valve Amp
  215. mismatched transformer impedance question.
  216. Second-hand or NOS tubes?
  217. Any suggestion for a 12AT7 / ECC81 SRPP powerstage ?
  218. Looking for High voltage double triode
  219. Will this ebay cover fit my Scott 272 integrated amp?
  220. My new find
  221. Thordarson Dual Tone Control
  222. samsung experiments with "tube sound"
  223. PP OPT design
  224. Heater voltage drops?
  225. WE448A data
  226. How come signal input capacitors are not on every amp?
  227. Any body can help to identify this pair of OPTs.
  228. tubelab SE component mounting
  229. Pre-amp for Tube Sound
  230. Audion tube amp capacitor questions
  231. Capacitor Substitution
  232. Hello, looking for advice on a tube project...
  233. Testing my Tube Tester
  234. Is this speaker a good choice for Tube amps
  235. Suggestions for upgrading my first tube amp!
  236. Why does the Miniwatt N3 have 4 connections to its output transformers?
  237. Anyone know if there is an octal
  238. Cathode Follower, where is the 3d H gone?
  239. Sylvania 45C14M progress.
  240. Collins R-390 Audio Deck
  241. 2 stage 2A3 SET - why does the 6n6p sim so well?
  242. Hi Everyone! Your thoughts on my Yaqin dilemma
  243. Audioromy in Shanghai ?
  244. volume Pot noise
  245. Full Music 300B solid plate sound fine ?
  246. Removing cathode-bypass capacitors, and compensation
  247. Q: UL PP Instability - Anode Grid2 Snubber
  248. The Shuguang SG-50 really support 650V in the plates ???
  249. Addinging windings to an Antek AS-... transformer
  250. Supertex dn2540 CCS Rset trimmer value

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