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

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