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  1. 6H6pi curves available?
  2. 1p24b
  3. help, Built from scratch Kalamazoo 2 noise
  4. 5CZ5/5BQ7A single ended amp
  5. Hopefully a simple question.
  6. 211 tube recommendations
  7. Need HELP with TUBE IMP
  8. Another unknown tube
  9. Triode Bias 101
  10. Bogen MO-200A transplant /conversion
  11. 5U4 o bridge rectifier
  12. Choosing the right transformer
  13. V-Cap Help
  14. Older tubes sound better
  15. 6J7 preamp
  16. Menygue mini/music angel amp
  17. Driving a Behringer INuke Nu1000
  18. cathode follower ecc88 on 60volt
  19. Docs for Heathkit AA-23?
  20. 45 tube amp schematic
  21. Old TO-R s15u, Should i fix it?
  22. Tube ID
  23. VTL driver tube question
  24. Fun with junk EL84 SE
  25. Enclosure ideas
  26. Burn in procedure for NOS necessary?
  27. Strange Lorenz ECC81 12AT7
  28. Amplifier first start up; Plays tone of signal generator with no speakers!
  29. Reports of the death of Audiophool have been greatly exaggerated
  30. help me identify some vintage tubes // need suggestions for possible applications!
  31. Lowering cost of audio output transformer
  32. Source for transformers in Europe
  33. morgan Jones HT caps & Anode Loads
  34. Tuning Negative feedback
  35. Hickok reference 6L6 for calibration..
  36. SET-NO FEEDBACK amplifier performance
  37. Stereo class A 6+6W - 2x 6L6G 1 x 6N2P
  38. Console Amplifier Pull:Voltages over Spec
  39. Help! My EL34B based amp arced at full volume.
  40. MUZAK 50's tube amp
  41. Tube break-in?
  42. Custom power tranny specs recommendations for 300B pse monoblocs
  43. mosfet source follower output stage.
  44. Winter upgrade project - new heating unit
  45. 6KM8 amp
  46. Power and output transformers to ground.
  47. Help with this schematic? B+? B++?
  48. What to do with this old amp? suggestions please.
  49. DIY CAT SL1 preamp
  50. Phase inverter, your comments welcomed!
  51. Basic Bias Question for PP Amp
  52. Oddwatt 5751/6550
  53. Please help me to identify Telefunken PCC ...
  54. Modification of 300B SE Amplifier
  55. 300B Tube and Amp Questions
  56. ST70 "Imposter"
  57. cathode follower question
  58. marconi tubes....can someone idntify these
  59. DeathTrap400 : : A Pretty Damn Good 300B Amp
  60. SOS: First Build, Lots of Hum
  61. 1959 Silvertone Syntronic Can Capacitor question
  62. KR Audio Marconi R valve amp?
  63. Distortion
  64. Tung-Sol 6098/6AR6 Substitution
  65. Dropout in RTP3 phono stage
  66. Audio Research EC-3 modification
  67. 300b all-DHT SET
  68. My first tube project !
  69. Trouble with homebuilt amp
  70. Music angel el34b problem
  71. Elecrolytic capacitor reforming
  72. The end of tubes?
  73. Two stages EL34 power amplifier
  74. 7199 replacement in AMPEX 6973
  75. IT coupled tube-SS hybrid amp suggestion- needs development
  76. Original Cary CAD-300se upgrades?
  77. Convert Integrated Tube Preamp to an amplifier
  78. McCurdy AM405 Schematics
  79. Looking for Neumann N149 power supply schematic
  80. B&K model 747 tube tester for EL34
  81. Behringer DEQ2496 for testing amplifiers and preamps frequency response ???
  82. I need datasheet of 8753 tube, help me!
  83. New 6L6GC Project. DC -> LTP
  84. EL84 in UL
  85. 1953 revere amp conversion
  86. Manley transformer specifications
  87. Recommended 300B SE Amplifier Designs
  88. Found a new interstage coupling method (?)
  89. Amplifier Distortion (Northern Electric)
  90. when do filament supplies need to be floated
  91. gm70 filiment transformers
  92. Replacing 6922 Preamp Tube in ARC LS7
  93. Please educate me: Tube testing, the life test, and Grid Leakage
  94. 6AR6 6098 Triode PP Load Line
  95. music reference rm5-4 schematics
  96. S5 K-12G output trans
  97. Transformer center tap question
  98. EF86 + 4*EL84PSE
  99. solid state relays for plate load switching?
  100. Dont have a power transformer?
  101. Kora Equinoxe Triode or Blue Circle BC-21.1 preamp?
  102. Pre-Amp For my Tubelab Simple P-P
  103. Power Transformer Help
  104. Analog Metric 2A3 PP Kit
  105. Good, starter OTL kit
  106. Dual SE amplifier? - (not PSE) - Take two!
  107. Mysterious SE OTL headphone amp from China?!
  108. Inv. Futterman with gain stages between PI and O/P?
  109. PSU configurations for tube amp
  110. HP Model 712b Regulated Power supply
  111. Dynaco low Power Amp
  112. 300b power suply
  113. Very Strange Preamp Issue
  114. WTB: I am looking for a Freed 1400V or Chicago 1200V/1400V Potted Power Transformer
  115. tube transformer suppliers in Mercosur
  116. Please Help: 6CJ3 Damper Diode Tube as Rectifier Question
  117. time delay sophia electric
  118. Twisting the leads of filter choke
  119. This SPUD's 4 U
  120. I am Looking for tubes
  121. Thuan
  122. Nanjing 6V6GT ( 6P6P)
  123. Should I keep this old stuff?
  124. 300b
  125. ganged output transformers
  126. Holco H4P Resistors, Should I use them?
  127. 6BX8 curves, help !
  128. SANSUI AU-70 or 1000A???
  129. General Electric YTW-1 Tube Checker
  130. Ground or amp hum-which?
  131. need help to fix the "hiss" on my tube preamp
  132. Best SE interstage 1:1 for min. 15mA?
  133. Dual Single Ended Amplifier? - (not PSE)
  134. RIP Forum Member "Ivey"
  135. Balanced Buffer Needed with a Balanced Volume Control?
  136. valves to replace opamps in cd player
  137. Replacing capacitors on Audio Research D40 power amp.
  138. No sound and low B+?
  139. Replacing capacitors on Audio Research D40 power amp.
  140. 2 Channel Tube Amp and Sub Connection
  141. EZ125 Amp Project
  142. Yaqin MS-22b Phono Amp
  143. First post and a couple P.P. questions
  144. adding a preamp to tube power amp
  145. 6SN7 6N8S preamp suggestions
  146. 300b polarity
  147. Electrolytic capacitor vs extra triode stage
  148. WE JAN 274B Dating
  149. EICO 666 Tester Help
  150. Hickock 550X signal voltage
  151. First Headphone tube amp kit to build??
  152. Anyone owns a Dynavox VR-307 Amplifier ?
  153. NOS potted Chicago Transformer 1BC-150
  154. capacitor voltage for tube amp power supply
  155. 808 SE Design Help!
  156. Why can't I build my own ARC LS-5 or CJ PV-12?
  157. Post-mortem on a 80 year old 2A3 amp
  158. 6e5p gm70 with 6d22s?
  159. 6L6-6V6-EL34-KT88-6CA7-EL84
  160. Scheme for SE amp
  161. $16,000
  162. Hybrid power amp
  163. Diagnosis please
  164. On now! Jamerson's Ampeg
  165. BK 707 Tube Tester Mods
  166. monarch 614
  167. Separate Filament and B+ Switches
  168. Dynaco Low Power with 12AY7's
  169. PTP kits available?
  170. Which OP transformer and materials?
  171. Power of Tube Amp and Transistors Amp
  172. testing tubes
  173. current servo not voltage.
  174. Help Me, How to make Pre-amp using 12AU7 tube and Op-Amp Ic mix?
  175. 300b filament
  176. DHT SE auto bias circuit
  177. Anyone try swapping 6SN7 w/ 6F8G
  178. Eliminating Cathode Bypass Caps In SET Amplifier
  179. Nano vacuum tube
  180. Help High Line voltage
  181. Switchable Amp Output?
  182. PCB or hardwire?
  183. 27 line pre amplifier
  184. Mystery tubes on FB?
  185. amplifier discussion
  186. Mikael Abdellah KT88 SE with Cornet2
  187. 5879 to 12AX7 conversion
  188. CCDA SE output stage?
  189. Bravo V2 tube headphone amp - high pitched noise?
  190. Preamp Grounding Question
  191. SE on 300B
  192. musical paradise mp 301
  193. Newbie plan
  194. Capacitor Voltage rating Question
  195. Can anybody identify this amp?
  196. Old RCA radio; can anyone ID this?
  197. Class AB2 - Kink, how and why?
  198. 6SL7, 6J5, or 6SN7 unity gain buffer amp
  199. CCDA dissimilar triode preamp
  200. NOS NEGLECTED HIGH-END AUDIO TUBE
  201. GOSS C-core suppliers in UK/Europe
  202. Old radio -> tube amplifier
  203. Sowter 8650 in SE
  204. My Russian SET
  205. Raysonic vs. DIY tube amp?
  206. Which pins to use first?
  207. Bypass gain stage on K16LS amp
  208. Schematic help for a Pilot 505 amp please
  209. Question re: Distortion in triode gain stage
  210. Newbie needs help
  211. Marantz Model 9
  212. Is my power transformer bad?
  213. japanese 6v6 amp on youtube, anyone got the link?
  214. First attempt at tube amp.
  215. 6p3s,6N1P,6j1p
  216. 6bq5 p-p diagnosise
  217. MFA Lumi suddenly whistles (on bench)
  218. Pure tetrode and negative g2
  219. ECC85, EL84 tube amp please help.
  220. Pentode buffer.
  221. 5k:8 ohm vs. 10k:16 ohm output transformer. What is the difference?
  222. Help restoring old Maas-Rowe amp
  223. Early Sansui Valve Amp
  224. mismatched transformer impedance question.
  225. Second-hand or NOS tubes?
  226. Any suggestion for a 12AT7 / ECC81 SRPP powerstage ?
  227. Looking for High voltage double triode
  228. Will this ebay cover fit my Scott 272 integrated amp?
  229. My new find
  230. Thordarson Dual Tone Control
  231. samsung experiments with "tube sound"
  232. PP OPT design
  233. Heater voltage drops?
  234. WE448A data
  235. How come signal input capacitors are not on every amp?
  236. Any body can help to identify this pair of OPTs.
  237. tubelab SE component mounting
  238. Pre-amp for Tube Sound
  239. Audion tube amp capacitor questions
  240. Capacitor Substitution
  241. Hello, looking for advice on a tube project...
  242. Testing my Tube Tester
  243. Is this speaker a good choice for Tube amps
  244. Suggestions for upgrading my first tube amp!
  245. Why does the Miniwatt N3 have 4 connections to its output transformers?
  246. Anyone know if there is an octal
  247. Cathode Follower, where is the 3d H gone?
  248. Sylvania 45C14M progress.
  249. Collins R-390 Audio Deck
  250. 2 stage 2A3 SET - why does the 6n6p sim so well?

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