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  1. Help for Main Transformer Spec for CCDA
  2. Switching SE and balanced inputs/outputs
  3. kt88 PP rectifier.
  4. How much Blue glow is ok?
  5. Recommendations on How To mono a pre amplifier?
  6. 6H6pi curves available?
  7. 1p24b
  8. help, Built from scratch Kalamazoo 2 noise
  9. 5CZ5/5BQ7A single ended amp
  10. Hopefully a simple question.
  11. 211 tube recommendations
  12. Need HELP with TUBE IMP
  13. Another unknown tube
  14. Triode Bias 101
  15. Bogen MO-200A transplant /conversion
  16. 5U4 o bridge rectifier
  17. Choosing the right transformer
  18. V-Cap Help
  19. Older tubes sound better
  20. 6J7 preamp
  21. Menygue mini/music angel amp
  22. Driving a Behringer INuke Nu1000
  23. cathode follower ecc88 on 60volt
  24. Docs for Heathkit AA-23?
  25. 45 tube amp schematic
  26. Old TO-R s15u, Should i fix it?
  27. Tube ID
  28. VTL driver tube question
  29. Fun with junk EL84 SE
  30. Enclosure ideas
  31. Burn in procedure for NOS necessary?
  32. Strange Lorenz ECC81 12AT7
  33. Amplifier first start up; Plays tone of signal generator with no speakers!
  34. Reports of the death of Audiophool have been greatly exaggerated
  35. help me identify some vintage tubes // need suggestions for possible applications!
  36. Lowering cost of audio output transformer
  37. Source for transformers in Europe
  38. morgan Jones HT caps & Anode Loads
  39. Tuning Negative feedback
  40. Hickok reference 6L6 for calibration..
  41. SET-NO FEEDBACK amplifier performance
  42. Stereo class A 6+6W - 2x 6L6G 1 x 6N2P
  43. Console Amplifier Pull:Voltages over Spec
  44. Help! My EL34B based amp arced at full volume.
  45. MUZAK 50's tube amp
  46. Tube break-in?
  47. Custom power tranny specs recommendations for 300B pse monoblocs
  48. mosfet source follower output stage.
  49. Winter upgrade project - new heating unit
  50. 6KM8 amp
  51. Power and output transformers to ground.
  52. Help with this schematic? B+? B++?
  53. What to do with this old amp? suggestions please.
  54. DIY CAT SL1 preamp
  55. Phase inverter, your comments welcomed!
  56. Basic Bias Question for PP Amp
  57. Oddwatt 5751/6550
  58. Please help me to identify Telefunken PCC ...
  59. Modification of 300B SE Amplifier
  60. 300B Tube and Amp Questions
  61. ST70 "Imposter"
  62. cathode follower question
  63. marconi tubes....can someone idntify these
  64. DeathTrap400 : : A Pretty Damn Good 300B Amp
  65. SOS: First Build, Lots of Hum
  66. 1959 Silvertone Syntronic Can Capacitor question
  67. KR Audio Marconi R valve amp?
  68. Distortion
  69. Tung-Sol 6098/6AR6 Substitution
  70. Dropout in RTP3 phono stage
  71. Audio Research EC-3 modification
  72. 300b all-DHT SET
  73. My first tube project !
  74. Trouble with homebuilt amp
  75. Music angel el34b problem
  76. Elecrolytic capacitor reforming
  77. The end of tubes?
  78. Two stages EL34 power amplifier
  79. 7199 replacement in AMPEX 6973
  80. IT coupled tube-SS hybrid amp suggestion- needs development
  81. Original Cary CAD-300se upgrades?
  82. Convert Integrated Tube Preamp to an amplifier
  83. McCurdy AM405 Schematics
  84. Looking for Neumann N149 power supply schematic
  85. B&K model 747 tube tester for EL34
  86. Behringer DEQ2496 for testing amplifiers and preamps frequency response ???
  87. I need datasheet of 8753 tube, help me!
  88. New 6L6GC Project. DC -> LTP
  89. EL84 in UL
  90. 1953 revere amp conversion
  91. Manley transformer specifications
  92. Recommended 300B SE Amplifier Designs
  93. Found a new interstage coupling method (?)
  94. Amplifier Distortion (Northern Electric)
  95. when do filament supplies need to be floated
  96. gm70 filiment transformers
  97. Replacing 6922 Preamp Tube in ARC LS7
  98. Please educate me: Tube testing, the life test, and Grid Leakage
  99. 6AR6 6098 Triode PP Load Line
  100. music reference rm5-4 schematics
  101. S5 K-12G output trans
  102. Transformer center tap question
  103. EF86 + 4*EL84PSE
  104. solid state relays for plate load switching?
  105. Dont have a power transformer?
  106. Kora Equinoxe Triode or Blue Circle BC-21.1 preamp?
  107. Pre-Amp For my Tubelab Simple P-P
  108. Power Transformer Help
  109. Analog Metric 2A3 PP Kit
  110. Good, starter OTL kit
  111. Dual SE amplifier? - (not PSE) - Take two!
  112. Mysterious SE OTL headphone amp from China?!
  113. Inv. Futterman with gain stages between PI and O/P?
  114. PSU configurations for tube amp
  115. HP Model 712b Regulated Power supply
  116. Dynaco low Power Amp
  117. 300b power suply
  118. Very Strange Preamp Issue
  119. WTB: I am looking for a Freed 1400V or Chicago 1200V/1400V Potted Power Transformer
  120. tube transformer suppliers in Mercosur
  121. Please Help: 6CJ3 Damper Diode Tube as Rectifier Question
  122. time delay sophia electric
  123. Twisting the leads of filter choke
  124. This SPUD's 4 U
  125. I am Looking for tubes
  126. Thuan
  127. Nanjing 6V6GT ( 6P6P)
  128. Should I keep this old stuff?
  129. 300b
  130. ganged output transformers
  131. Holco H4P Resistors, Should I use them?
  132. 6BX8 curves, help !
  133. SANSUI AU-70 or 1000A???
  134. General Electric YTW-1 Tube Checker
  135. Ground or amp hum-which?
  136. need help to fix the "hiss" on my tube preamp
  137. Best SE interstage 1:1 for min. 15mA?
  138. Dual Single Ended Amplifier? - (not PSE)
  139. RIP Forum Member "Ivey"
  140. Balanced Buffer Needed with a Balanced Volume Control?
  141. valves to replace opamps in cd player
  142. Replacing capacitors on Audio Research D40 power amp.
  143. No sound and low B+?
  144. Replacing capacitors on Audio Research D40 power amp.
  145. 2 Channel Tube Amp and Sub Connection
  146. EZ125 Amp Project
  147. Yaqin MS-22b Phono Amp
  148. First post and a couple P.P. questions
  149. adding a preamp to tube power amp
  150. 6SN7 6N8S preamp suggestions
  151. 300b polarity
  152. Electrolytic capacitor vs extra triode stage
  153. WE JAN 274B Dating
  154. EICO 666 Tester Help
  155. Hickock 550X signal voltage
  156. First Headphone tube amp kit to build??
  157. Anyone owns a Dynavox VR-307 Amplifier ?
  158. NOS potted Chicago Transformer 1BC-150
  159. capacitor voltage for tube amp power supply
  160. 808 SE Design Help!
  161. Why can't I build my own ARC LS-5 or CJ PV-12?
  162. Post-mortem on a 80 year old 2A3 amp
  163. 6e5p gm70 with 6d22s?
  164. 6L6-6V6-EL34-KT88-6CA7-EL84
  165. Scheme for SE amp
  166. $16,000
  167. Hybrid power amp
  168. Diagnosis please
  169. On now! Jamerson's Ampeg
  170. BK 707 Tube Tester Mods
  171. monarch 614
  172. Separate Filament and B+ Switches
  173. Dynaco Low Power with 12AY7's
  174. PTP kits available?
  175. Which OP transformer and materials?
  176. Power of Tube Amp and Transistors Amp
  177. testing tubes
  178. current servo not voltage.
  179. Help Me, How to make Pre-amp using 12AU7 tube and Op-Amp Ic mix?
  180. 300b filament
  181. DHT SE auto bias circuit
  182. Anyone try swapping 6SN7 w/ 6F8G
  183. Eliminating Cathode Bypass Caps In SET Amplifier
  184. Nano vacuum tube
  185. Help High Line voltage
  186. Switchable Amp Output?
  187. PCB or hardwire?
  188. 27 line pre amplifier
  189. Mystery tubes on FB?
  190. amplifier discussion
  191. Mikael Abdellah KT88 SE with Cornet2
  192. 5879 to 12AX7 conversion
  193. CCDA SE output stage?
  194. Bravo V2 tube headphone amp - high pitched noise?
  195. Preamp Grounding Question
  196. SE on 300B
  197. musical paradise mp 301
  198. Newbie plan
  199. Capacitor Voltage rating Question
  200. Can anybody identify this amp?
  201. Old RCA radio; can anyone ID this?
  202. Class AB2 - Kink, how and why?
  203. 6SL7, 6J5, or 6SN7 unity gain buffer amp
  204. CCDA dissimilar triode preamp
  205. NOS NEGLECTED HIGH-END AUDIO TUBE
  206. GOSS C-core suppliers in UK/Europe
  207. Old radio -> tube amplifier
  208. Sowter 8650 in SE
  209. My Russian SET
  210. Raysonic vs. DIY tube amp?
  211. Which pins to use first?
  212. Bypass gain stage on K16LS amp
  213. Schematic help for a Pilot 505 amp please
  214. Question re: Distortion in triode gain stage
  215. Newbie needs help
  216. Marantz Model 9
  217. Is my power transformer bad?
  218. japanese 6v6 amp on youtube, anyone got the link?
  219. First attempt at tube amp.
  220. 6p3s,6N1P,6j1p
  221. 6bq5 p-p diagnosise
  222. MFA Lumi suddenly whistles (on bench)
  223. Pure tetrode and negative g2
  224. ECC85, EL84 tube amp please help.
  225. Pentode buffer.
  226. 5k:8 ohm vs. 10k:16 ohm output transformer. What is the difference?
  227. Help restoring old Maas-Rowe amp
  228. Early Sansui Valve Amp
  229. mismatched transformer impedance question.
  230. Second-hand or NOS tubes?
  231. Any suggestion for a 12AT7 / ECC81 SRPP powerstage ?
  232. Looking for High voltage double triode
  233. Will this ebay cover fit my Scott 272 integrated amp?
  234. My new find
  235. Thordarson Dual Tone Control
  236. samsung experiments with "tube sound"
  237. PP OPT design
  238. Heater voltage drops?
  239. WE448A data
  240. How come signal input capacitors are not on every amp?
  241. Any body can help to identify this pair of OPTs.
  242. tubelab SE component mounting
  243. Pre-amp for Tube Sound
  244. Audion tube amp capacitor questions
  245. Capacitor Substitution
  246. Hello, looking for advice on a tube project...
  247. Testing my Tube Tester
  248. Is this speaker a good choice for Tube amps
  249. Suggestions for upgrading my first tube amp!
  250. Why does the Miniwatt N3 have 4 connections to its output transformers?

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