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  1. Need help with UTC transformer
  2. Very interesting 300b design
  3. How to understand the power output in this case?
  4. K12G Help
  5. all dht se PX4
  6. multiple output transformers per channel
  7. What would you change in this schematic? (PP amp)
  8. Anyone know where to get this type of breadboard?
  9. moscode 600 tube recommendations
  10. Should I use two separate OPTs for parallel output tubes?
  11. custom Tube chassis vendor
  12. VLS631 Thermal Delay
  13. 6au6 preamp stage
  14. Recognize this tubes...
  15. need help for my new amp: 6G6G driver & 807 SE
  16. Anyone heard of radiometal for transformer core?
  17. BCF-2
  18. Glowing Plates of Doom
  19. Modding Aikido to non-Aikido such as SRPP?
  20. DN2540 plate load.
  21. Help! Did my power cable blow his tubes?
  22. 211 amp SRPP driver
  23. Tubelab SE problem
  24. tube to replace opamps in cd player
  25. Jolida 302b started to crack/pop once a minute
  26. why it doesn't work - 300B SE power amp
  27. Trio KW-70 schematic also known as WX-400 under kenwood name
  28. New DC to AC to high voltage AC idea?
  29. LED bias for 6N1P driver
  30. DIY tube amp general inquiry
  31. 6as7 Aikido headphone amplifier
  32. Cold tubes in warm amp = smoke?
  33. Keroes: Direct-Coupled amplifier
  34. Tube ID help please.
  35. exactly HOW does a tube amp work? or a vacuum tube?
  36. David Berning's zh-230 - whats going on here?
  37. EICO HF86 scratch build question please
  38. what to do with a 12W 600ohm to 4/8 ohm output transformer?
  39. Telewatt VS71M
  40. Yamamoto 09S 300B SE Amp Problem
  41. Marantz-9
  42. 6V6 amp question
  43. Wood chassis
  44. My first project SE(T) into high end audio.
  45. Supermalloy for the Power transformer?
  46. Can I build a screen reg. with IXYS 10M45?
  47. Modified DynacoMkIV
  48. Refurbising Conrad Johnson Premier One
  49. Would using a 16ohm speaker damage my SE output transformers?
  50. Grommes/PE S-35 questions
  51. Concertina phase inverter with LED bias - is this completely wrong?
  52. Parafeed turn-on delay
  53. I'm looking for 6an8 (as V1) schematics
  54. New Project - EL84 PP and preamp - suggestions welcome
  55. The sound of modern transformers compared with vintage gear
  56. Determining the core cross sectional area, Afe, for SE OPT
  57. HT power supply high?
  58. under-run push pull
  59. 12B4 Linestage Woes
  60. Transcendent Sound Mini-Beast
  61. A Question About Positive Feedback
  62. Help with opera consonance M100plus
  63. Just received 2x PT Choke OT. best implementation ?
  64. Just received 2x PT Choke OT. best implementation ?
  65. Mystery Valve ID
  66. Oddball OT with extra secondary winding
  67. Help with Multi Section Can Cap replacement
  68. 600V bench variable supply to test transmitting valves
  69. Heater-cathode voltage spec interpretation
  70. Tell me why this wont work.
  71. headphone amp for Senns HD600
  72. Transformer orientation and suggestions.
  73. 12AU7 stereo SE mini-amp build!
  74. allen type 20a schematic
  75. 2010 lemon year for EH 6922 tubes
  76. Chinese GU50 PP
  77. Gain, Vpp and attenuation at each stage
  78. 6n14p headphone amp
  79. Heater Lifter
  80. KT88 & 6550 Pentode power output?
  81. Biasing Improved Williamson
  82. Vox V941 active FX Loop - I'm looking for schematics
  83. Lowering the Volume Control on Tube Amps
  84. Got the Hum out!! Thanks All
  85. How hot KT88 get? Anybody take a reading?
  86. Broskie Unbalancer
  87. Phase splitting transformer design
  88. Red plate KT88
  89. 6N16B preamp
  90. Eimac 450th nos
  91. how much clearance above tubes for KT88 enclosure
  92. Cathode preheating???
  93. RIAA Question - Power
  94. Linearity of Red RCA 5692
  95. What gauge enclosure for KT88 AMP?
  96. Output Transformer Issue???
  97. Maggie 8802 placement issue
  98. Can you recommend a tube tester?
  99. 6550 tube protection socket
  100. PT laminations are usable as OT laminations ?
  101. Are These Authentic Russian Military 1578 Vacuum Tubes?
  102. Amp ID Please
  103. Help for Main Transformer Spec for CCDA
  104. Switching SE and balanced inputs/outputs
  105. kt88 PP rectifier.
  106. How much Blue glow is ok?
  107. Recommendations on How To mono a pre amplifier?
  108. 6H6pi curves available?
  109. 1p24b
  110. help, Built from scratch Kalamazoo 2 noise
  111. 5CZ5/5BQ7A single ended amp
  112. Hopefully a simple question.
  113. 211 tube recommendations
  114. Need HELP with TUBE IMP
  115. Another unknown tube
  116. Triode Bias 101
  117. Bogen MO-200A transplant /conversion
  118. 5U4 o bridge rectifier
  119. Choosing the right transformer
  120. V-Cap Help
  121. Older tubes sound better
  122. 6J7 preamp
  123. Menygue mini/music angel amp
  124. Driving a Behringer INuke Nu1000
  125. cathode follower ecc88 on 60volt
  126. Docs for Heathkit AA-23?
  127. 45 tube amp schematic
  128. Old TO-R s15u, Should i fix it?
  129. Tube ID
  130. VTL driver tube question
  131. Fun with junk EL84 SE
  132. Enclosure ideas
  133. Burn in procedure for NOS necessary?
  134. Strange Lorenz ECC81 12AT7
  135. Amplifier first start up; Plays tone of signal generator with no speakers!
  136. Reports of the death of Audiophool have been greatly exaggerated
  137. help me identify some vintage tubes // need suggestions for possible applications!
  138. Lowering cost of audio output transformer
  139. Source for transformers in Europe
  140. morgan Jones HT caps & Anode Loads
  141. Tuning Negative feedback
  142. Hickok reference 6L6 for calibration..
  143. SET-NO FEEDBACK amplifier performance
  144. Stereo class A 6+6W - 2x 6L6G 1 x 6N2P
  145. Console Amplifier Pull:Voltages over Spec
  146. Help! My EL34B based amp arced at full volume.
  147. MUZAK 50's tube amp
  148. Tube break-in?
  149. Custom power tranny specs recommendations for 300B pse monoblocs
  150. mosfet source follower output stage.
  151. Winter upgrade project - new heating unit
  152. 6KM8 amp
  153. Power and output transformers to ground.
  154. Help with this schematic? B+? B++?
  155. What to do with this old amp? suggestions please.
  156. DIY CAT SL1 preamp
  157. Phase inverter, your comments welcomed!
  158. Basic Bias Question for PP Amp
  159. Oddwatt 5751/6550
  160. Please help me to identify Telefunken PCC ...
  161. Modification of 300B SE Amplifier
  162. 300B Tube and Amp Questions
  163. ST70 "Imposter"
  164. cathode follower question
  165. marconi tubes....can someone idntify these
  166. DeathTrap400 : : A Pretty Damn Good 300B Amp
  167. SOS: First Build, Lots of Hum
  168. 1959 Silvertone Syntronic Can Capacitor question
  169. KR Audio Marconi R valve amp?
  170. Distortion
  171. Tung-Sol 6098/6AR6 Substitution
  172. Dropout in RTP3 phono stage
  173. Audio Research EC-3 modification
  174. 300b all-DHT SET
  175. My first tube project !
  176. Trouble with homebuilt amp
  177. Music angel el34b problem
  178. Elecrolytic capacitor reforming
  179. The end of tubes?
  180. Two stages EL34 power amplifier
  181. 7199 replacement in AMPEX 6973
  182. IT coupled tube-SS hybrid amp suggestion- needs development
  183. Original Cary CAD-300se upgrades?
  184. Convert Integrated Tube Preamp to an amplifier
  185. McCurdy AM405 Schematics
  186. Looking for Neumann N149 power supply schematic
  187. B&K model 747 tube tester for EL34
  188. Behringer DEQ2496 for testing amplifiers and preamps frequency response ???
  189. I need datasheet of 8753 tube, help me!
  190. New 6L6GC Project. DC -> LTP
  191. EL84 in UL
  192. 1953 revere amp conversion
  193. Manley transformer specifications
  194. Recommended 300B SE Amplifier Designs
  195. Found a new interstage coupling method (?)
  196. Amplifier Distortion (Northern Electric)
  197. when do filament supplies need to be floated
  198. gm70 filiment transformers
  199. Replacing 6922 Preamp Tube in ARC LS7
  200. Please educate me: Tube testing, the life test, and Grid Leakage
  201. 6AR6 6098 Triode PP Load Line
  202. music reference rm5-4 schematics
  203. S5 K-12G output trans
  204. Transformer center tap question
  205. EF86 + 4*EL84PSE
  206. solid state relays for plate load switching?
  207. Dont have a power transformer?
  208. Kora Equinoxe Triode or Blue Circle BC-21.1 preamp?
  209. Pre-Amp For my Tubelab Simple P-P
  210. Power Transformer Help
  211. Analog Metric 2A3 PP Kit
  212. Good, starter OTL kit
  213. Dual SE amplifier? - (not PSE) - Take two!
  214. Mysterious SE OTL headphone amp from China?!
  215. Inv. Futterman with gain stages between PI and O/P?
  216. PSU configurations for tube amp
  217. HP Model 712b Regulated Power supply
  218. Dynaco low Power Amp
  219. 300b power suply
  220. Very Strange Preamp Issue
  221. WTB: I am looking for a Freed 1400V or Chicago 1200V/1400V Potted Power Transformer
  222. tube transformer suppliers in Mercosur
  223. Please Help: 6CJ3 Damper Diode Tube as Rectifier Question
  224. time delay sophia electric
  225. Twisting the leads of filter choke
  226. This SPUD's 4 U
  227. I am Looking for tubes
  228. Thuan
  229. Nanjing 6V6GT ( 6P6P)
  230. Should I keep this old stuff?
  231. 300b
  232. ganged output transformers
  233. Holco H4P Resistors, Should I use them?
  234. 6BX8 curves, help !
  235. SANSUI AU-70 or 1000A???
  236. General Electric YTW-1 Tube Checker
  237. Ground or amp hum-which?
  238. need help to fix the "hiss" on my tube preamp
  239. Best SE interstage 1:1 for min. 15mA?
  240. Dual Single Ended Amplifier? - (not PSE)
  241. RIP Forum Member "Ivey"
  242. Balanced Buffer Needed with a Balanced Volume Control?
  243. valves to replace opamps in cd player
  244. Replacing capacitors on Audio Research D40 power amp.
  245. No sound and low B+?
  246. Replacing capacitors on Audio Research D40 power amp.
  247. 2 Channel Tube Amp and Sub Connection
  248. EZ125 Amp Project
  249. Yaqin MS-22b Phono Amp
  250. First post and a couple P.P. questions

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