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  1. Should I ???
  2. Can you classify condition of tubes?
  3. ecc99 preamp into an amp
  4. eico st70 input impedance question
  5. Tube Preamp or Power Amp?
  6. pmillett "Engineer's Amplifier" to mono?
  7. Advice/schematics wanted for HF-81 opt project
  8. valve upgrade
  9. has anyone known about Ming Da amplifiers
  10. A nice little valve amplifier
  11. Use rectifier winding for 6.3V DC heater?
  12. Voltage Regulators Zener / Gas Reg
  13. Looking for first tube amp kit.
  14. UK input voltage question
  15. 1sh29b
  16. 6G2 amp - volume and tone play up on one input only
  17. One channel grainy sound
  18. anybody know 6BY5 plate resistance ?
  19. SE 6550
  20. Yaqin MC-100b Volume pot
  21. Pair of possible MC step ups - octal mount
  22. My Mighty Midget
  23. Conrad Johnson MV75 "update circuit drawing"
  24. Cheap Red LED bias on ecc83/12ax7
  25. stoneAmp
  26. Project thread: KT88 PP amp
  27. I need the voltages or schematic for a Magnavox 177.55 amp
  28. Different PSE output designs - which to use?
  29. Toroidal (adding a winding)
  30. Kondo Souga - audition
  31. a incar tube/valve line driver
  32. Before I punch the holes.. A quartet of EL84?
  33. Tubes Home Theater 4+1
  34. DAC direct out, not enough gain, help me build a driving stage.
  35. ultra linear aikido with linearizing pentode
  36. Scott 299
  37. OPTs With Multiple Secondaries
  38. Over Four Tons Of Tubes
  39. L channel lower output?
  40. 16LS Amp by S5 Electronics Questions
  41. Heathkit WM-5
  42. 6BL8 not on roll chart
  43. CJ PV-5 PS rebuild
  44. Attenuator for passive pre (LEAK ST 20)
  45. Help ID tubes Plz
  46. Data sheet and load line question
  47. Trouble with Silver to Black face twin mod.
  48. Grommes S35 booster amp output?
  49. dc filament heater - high impedance const. voltage
  50. Schematic for Modwright SWL 9.0se Preamp
  51. GZ37 substitutes
  52. output attenuation
  53. My humming home made tube amp
  54. Shared Cathodes 300b
  55. Bogen CHB-35 for Music...
  56. correctly connecting PT for 110/220 volts
  57. voltage divider
  58. "Bypass caps" and their effect on perceived sound
  59. Repair of Cayin HA-2 Tube Headphone Amp
  60. Best Drive for EL34
  61. Needing Schematic for Grommes LJ7 please.
  62. 6550C v. KT88
  63. ECC81 MU-Follower consumption
  64. Locating hum source
  65. c3g self oscillation problem - a newbie needs help!
  66. Voice of music console help
  67. One tube radio
  68. Triodes with better "look&feel"
  69. HV Supply
  70. Will this arrangement impact the input impedence of the cathode follower?
  71. Measuring preamp output impedance
  72. Capacitor from 120VAC to ground
  73. I have power but no sound???
  74. Using a function generator with a tube amp?
  75. What resistors to use on KT88s tubes?
  76. Opinions on Raysonic sp-200 + Raysonic 168 CD
  77. Could really use some help here!
  78. Help~ GU50 ?
  79. Some Power Supply Help
  80. newbies beware of lampizator srpp pdf
  81. Headphone output
  82. Has anyone played around with this as an amp front end?
  83. Help for Dynavox VR-70E
  84. Heathkit TT-1 (testing a 199, 99 tube)
  85. Tube And Transformer I/V Converter For Differential Current DAC
  86. Volume increases as amp warms up
  87. New 6V6 Build - Suggestions Needed
  88. Tubes Numbers
  89. VTL
  90. Visit to KR audio Prague 20120921
  91. Where did he posted it?
  92. Problems with PT325.2i
  93. What phono preamp with Dynaco MKIII
  94. opinions on supporting a past sale/trade deal
  95. Series connection of regulator tubes
  96. Preamp buzzes when volume is at zero?
  97. Hrrrrmphhhff. PSU design error and how to cope with it
  98. 300B fixed bias specs
  99. Battery filament for 4P1L
  100. Need pro help with this tube amp.
  101. Need help with UTC transformer
  102. Very interesting 300b design
  103. How to understand the power output in this case?
  104. K12G Help
  105. all dht se PX4
  106. multiple output transformers per channel
  107. What would you change in this schematic? (PP amp)
  108. Anyone know where to get this type of breadboard?
  109. moscode 600 tube recommendations
  110. Should I use two separate OPTs for parallel output tubes?
  111. custom Tube chassis vendor
  112. VLS631 Thermal Delay
  113. 6au6 preamp stage
  114. Recognize this tubes...
  115. need help for my new amp: 6G6G driver & 807 SE
  116. Anyone heard of radiometal for transformer core?
  117. BCF-2
  118. Glowing Plates of Doom
  119. Modding Aikido to non-Aikido such as SRPP?
  120. DN2540 plate load.
  121. Help! Did my power cable blow his tubes?
  122. 211 amp SRPP driver
  123. tube to replace opamps in cd player
  124. Jolida 302b started to crack/pop once a minute
  125. why it doesn't work - 300B SE power amp
  126. Trio KW-70 schematic also known as WX-400 under kenwood name
  127. New DC to AC to high voltage AC idea?
  128. LED bias for 6N1P driver
  129. DIY tube amp general inquiry
  130. 6as7 Aikido headphone amplifier
  131. Cold tubes in warm amp = smoke?
  132. Keroes: Direct-Coupled amplifier
  133. Tube ID help please.
  134. exactly HOW does a tube amp work? or a vacuum tube?
  135. David Berning's zh-230 - whats going on here?
  136. EICO HF86 scratch build question please
  137. what to do with a 12W 600ohm to 4/8 ohm output transformer?
  138. Telewatt VS71M
  139. Yamamoto 09S 300B SE Amp Problem
  140. Marantz-9
  141. 6V6 amp question
  142. My first project SE(T) into high end audio.
  143. Supermalloy for the Power transformer?
  144. Can I build a screen reg. with IXYS 10M45?
  145. Modified DynacoMkIV
  146. Refurbising Conrad Johnson Premier One
  147. Would using a 16ohm speaker damage my SE output transformers?
  148. Grommes/PE S-35 questions
  149. Concertina phase inverter with LED bias - is this completely wrong?
  150. Parafeed turn-on delay
  151. I'm looking for 6an8 (as V1) schematics
  152. New Project - EL84 PP and preamp - suggestions welcome
  153. The sound of modern transformers compared with vintage gear
  154. Determining the core cross sectional area, Afe, for SE OPT
  155. HT power supply high?
  156. under-run push pull
  157. 12B4 Linestage Woes
  158. Transcendent Sound Mini-Beast
  159. A Question About Positive Feedback
  160. Help with opera consonance M100plus
  161. Just received 2x PT Choke OT. best implementation ?
  162. Just received 2x PT Choke OT. best implementation ?
  163. Mystery Valve ID
  164. Oddball OT with extra secondary winding
  165. Help with Multi Section Can Cap replacement
  166. Heater-cathode voltage spec interpretation
  167. Tell me why this wont work.
  168. headphone amp for Senns HD600
  169. Transformer orientation and suggestions.
  170. 12AU7 stereo SE mini-amp build!
  171. allen type 20a schematic
  172. 2010 lemon year for EH 6922 tubes
  173. Chinese GU50 PP
  174. Gain, Vpp and attenuation at each stage
  175. 6n14p headphone amp
  176. Heater Lifter
  177. KT88 & 6550 Pentode power output?
  178. Biasing Improved Williamson
  179. Lowering the Volume Control on Tube Amps
  180. Got the Hum out!! Thanks All
  181. How hot KT88 get? Anybody take a reading?
  182. Broskie Unbalancer
  183. Phase splitting transformer design
  184. Red plate KT88
  185. 6N16B preamp
  186. Eimac 450th nos
  187. how much clearance above tubes for KT88 enclosure
  188. Cathode preheating???
  189. RIAA Question - Power
  190. Linearity of Red RCA 5692
  191. What gauge enclosure for KT88 AMP?
  192. Output Transformer Issue???
  193. Maggie 8802 placement issue
  194. 6550 tube protection socket
  195. PT laminations are usable as OT laminations ?
  196. Are These Authentic Russian Military 1578 Vacuum Tubes?
  197. Amp ID Please
  198. Help for Main Transformer Spec for CCDA
  199. Switching SE and balanced inputs/outputs
  200. kt88 PP rectifier.
  201. How much Blue glow is ok?
  202. Recommendations on How To mono a pre amplifier?
  203. 6H6pi curves available?
  204. 1p24b
  205. help, Built from scratch Kalamazoo 2 noise
  206. 5CZ5/5BQ7A single ended amp
  207. Hopefully a simple question.
  208. 211 tube recommendations
  209. Need HELP with TUBE IMP
  210. Another unknown tube
  211. Triode Bias 101
  212. Bogen MO-200A transplant /conversion
  213. 5U4 o bridge rectifier
  214. Choosing the right transformer
  215. Older tubes sound better
  216. 6J7 preamp
  217. Menygue mini/music angel amp
  218. Driving a Behringer INuke Nu1000
  219. cathode follower ecc88 on 60volt
  220. Docs for Heathkit AA-23?
  221. 45 tube amp schematic
  222. Old TO-R s15u, Should i fix it?
  223. Tube ID
  224. VTL driver tube question
  225. Fun with junk EL84 SE
  226. Burn in procedure for NOS necessary?
  227. Strange Lorenz ECC81 12AT7
  228. Amplifier first start up; Plays tone of signal generator with no speakers!
  229. Reports of the death of Audiophool have been greatly exaggerated
  230. help me identify some vintage tubes // need suggestions for possible applications!
  231. Lowering cost of audio output transformer
  232. Source for transformers in Europe
  233. morgan Jones HT caps & Anode Loads
  234. Tuning Negative feedback
  235. SET-NO FEEDBACK amplifier performance
  236. Stereo class A 6+6W - 2x 6L6G 1 x 6N2P
  237. Console Amplifier Pull:Voltages over Spec
  238. Help! My EL34B based amp arced at full volume.
  239. MUZAK 50's tube amp
  240. Tube break-in?
  241. Custom power tranny specs recommendations for 300B pse monoblocs
  242. mosfet source follower output stage.
  243. Winter upgrade project - new heating unit
  244. 6KM8 amp
  245. Power and output transformers to ground.
  246. Help with this schematic? B+? B++?
  247. What to do with this old amp? suggestions please.
  248. DIY CAT SL1 preamp
  249. Phase inverter, your comments welcomed!
  250. Basic Bias Question for PP Amp

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