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  1. Bias Supply protection
  2. Tube Amp Schematics
  3. POWER TRANSFORMER IDENTIFICATION NEEDED "26R90"
  4. 6sn7 driving Push Pull Parallel kt88's?
  5. help with an old Peak ST-100 - single ended 6GW8
  6. Designing an 801 SET Class A2 Amp
  7. Grid choke considerations for 300b
  8. SE poweramp with best bass performance
  9. 45 Tube IN SET Amp
  10. what will happen?
  11. ECL86 PP Amp - Very low frequency clicking
  12. motor run cap question
  13. Power Switch/Indicator Lamp Mod to S-5 Electronics K-501
  14. EL34 SET With No Driver Tube?
  15. Filter capacitors - motor run?
  16. Microwave transformers
  17. Capacitors in the cathode of preamp tubes
  18. How Many Tubes to a Rackspace?
  19. selenium diodes
  20. Is it possible to Oversize an SE OPT?
  21. questions about my ecc83 phono pre build
  22. PSU resistor temperature
  23. QE08-200
  24. Adding heater transformer to my 6b4g amp. help a noob please.
  25. Bogen CHB-35a Troubleshooting: Distortion, Power Tubes Very Hot
  26. Big Cap in luxman MB3045
  27. Question about 4x12 cabinet wiring
  28. What happened to Sakuma-san's website ?
  29. Should I ???
  30. Can you classify condition of tubes?
  31. Help: Hickok Western Electric KS-15750-L1 Tubes Tester Maintenance and Calibration
  32. ecc99 preamp into an amp
  33. AI 500 Volume pot advice wanted.
  34. eico st70 input impedance question
  35. Tube Preamp or Power Amp?
  36. pmillett "Engineer's Amplifier" to mono?
  37. Advice/schematics wanted for HF-81 opt project
  38. 7591 tube, can't find that number on tester.
  39. valve upgrade
  40. has anyone known about Ming Da amplifiers
  41. A nice little valve amplifier
  42. Use rectifier winding for 6.3V DC heater?
  43. Voltage Regulators Zener / Gas Reg
  44. Looking for first tube amp kit.
  45. Which choke is better ?
  46. UK input voltage question
  47. 1sh29b
  48. 6G2 amp - volume and tone play up on one input only
  49. One channel grainy sound
  50. anybody know 6BY5 plate resistance ?
  51. SE 6550
  52. Yaqin MC-100b Volume pot
  53. Pair of possible MC step ups - octal mount
  54. My Mighty Midget
  55. Conrad Johnson MV75 "update circuit drawing"
  56. Cheap Red LED bias on ecc83/12ax7
  57. stoneAmp
  58. Project thread: KT88 PP amp
  59. I need the voltages or schematic for a Magnavox 177.55 amp
  60. Different PSE output designs - which to use?
  61. Toroidal (adding a winding)
  62. Kondo Souga - audition
  63. Electrocube Polyestyrene caps
  64. a incar tube/valve line driver
  65. Before I punch the holes.. A quartet of EL84?
  66. Tubes Home Theater 4+1
  67. DAC direct out, not enough gain, help me build a driving stage.
  68. ultra linear aikido with linearizing pentode
  69. Scott 299
  70. OPTs With Multiple Secondaries
  71. Over Four Tons Of Tubes
  72. L channel lower output?
  73. 16LS Amp by S5 Electronics Questions
  74. Heathkit WM-5
  75. 6BL8 not on roll chart
  76. CJ PV-5 PS rebuild
  77. Attenuator for passive pre (LEAK ST 20)
  78. Help ID tubes Plz
  79. Data sheet and load line question
  80. Trouble with Silver to Black face twin mod.
  81. Grommes S35 booster amp output?
  82. dc filament heater - high impedance const. voltage
  83. Schematic for Modwright SWL 9.0se Preamp
  84. GZ37 substitutes
  85. output attenuation
  86. My humming home made tube amp
  87. Shared Cathodes 300b
  88. Bogen CHB-35 for Music...
  89. correctly connecting PT for 110/220 volts
  90. voltage divider
  91. "Bypass caps" and their effect on perceived sound
  92. Repair of Cayin HA-2 Tube Headphone Amp
  93. Best Drive for EL34
  94. Needing Schematic for Grommes LJ7 please.
  95. 6550C v. KT88
  96. ECC81 MU-Follower consumption
  97. Locating hum source
  98. c3g self oscillation problem - a newbie needs help!
  99. Voice of music console help
  100. One tube radio
  101. Triodes with better "look&feel"
  102. HV Supply
  103. Will this arrangement impact the input impedence of the cathode follower?
  104. Measuring preamp output impedance
  105. Capacitor from 120VAC to ground
  106. I have power but no sound???
  107. Using a function generator with a tube amp?
  108. What resistors to use on KT88s tubes?
  109. Opinions on Raysonic sp-200 + Raysonic 168 CD
  110. Lab power supply for testing tubes
  111. Could really use some help here!
  112. Help~ GU50 ?
  113. Some Power Supply Help
  114. newbies beware of lampizator srpp pdf
  115. Headphone output
  116. Has anyone played around with this as an amp front end?
  117. Help for Dynavox VR-70E
  118. Heathkit TT-1 (testing a 199, 99 tube)
  119. Tube And Transformer I/V Converter For Differential Current DAC
  120. Volume increases as amp warms up
  121. New 6V6 Build - Suggestions Needed
  122. Tubes Numbers
  123. VTL
  124. Visit to KR audio Prague 20120921
  125. Where did he posted it?
  126. Problems with PT325.2i
  127. What phono preamp with Dynaco MKIII
  128. opinions on supporting a past sale/trade deal
  129. Series connection of regulator tubes
  130. Preamp buzzes when volume is at zero?
  131. Hrrrrmphhhff. PSU design error and how to cope with it
  132. 300B fixed bias specs
  133. Battery filament for 4P1L
  134. Need pro help with this tube amp.
  135. Guitar Amps Output Transformer specs
  136. Need help with UTC transformer
  137. Very interesting 300b design
  138. How to understand the power output in this case?
  139. K12G Help
  140. all dht se PX4
  141. multiple output transformers per channel
  142. What would you change in this schematic? (PP amp)
  143. Anyone know where to get this type of breadboard?
  144. moscode 600 tube recommendations
  145. Should I use two separate OPTs for parallel output tubes?
  146. custom Tube chassis vendor
  147. VLS631 Thermal Delay
  148. 6au6 preamp stage
  149. Recognize this tubes...
  150. need help for my new amp: 6G6G driver & 807 SE
  151. Anyone heard of radiometal for transformer core?
  152. BCF-2
  153. Glowing Plates of Doom
  154. Modding Aikido to non-Aikido such as SRPP?
  155. DN2540 plate load.
  156. Help! Did my power cable blow his tubes?
  157. 211 amp SRPP driver
  158. Tubelab SE problem
  159. tube to replace opamps in cd player
  160. Jolida 302b started to crack/pop once a minute
  161. why it doesn't work - 300B SE power amp
  162. Trio KW-70 schematic also known as WX-400 under kenwood name
  163. New DC to AC to high voltage AC idea?
  164. LED bias for 6N1P driver
  165. DIY tube amp general inquiry
  166. 6as7 Aikido headphone amplifier
  167. Cold tubes in warm amp = smoke?
  168. Keroes: Direct-Coupled amplifier
  169. Tube ID help please.
  170. exactly HOW does a tube amp work? or a vacuum tube?
  171. David Berning's zh-230 - whats going on here?
  172. EICO HF86 scratch build question please
  173. what to do with a 12W 600ohm to 4/8 ohm output transformer?
  174. Telewatt VS71M
  175. Yamamoto 09S 300B SE Amp Problem
  176. Marantz-9
  177. 6V6 amp question
  178. Wood chassis
  179. My first project SE(T) into high end audio.
  180. Supermalloy for the Power transformer?
  181. Can I build a screen reg. with IXYS 10M45?
  182. Modified DynacoMkIV
  183. Refurbising Conrad Johnson Premier One
  184. Would using a 16ohm speaker damage my SE output transformers?
  185. Grommes/PE S-35 questions
  186. Concertina phase inverter with LED bias - is this completely wrong?
  187. Parafeed turn-on delay
  188. I'm looking for 6an8 (as V1) schematics
  189. New Project - EL84 PP and preamp - suggestions welcome
  190. The sound of modern transformers compared with vintage gear
  191. Determining the core cross sectional area, Afe, for SE OPT
  192. HT power supply high?
  193. under-run push pull
  194. 12B4 Linestage Woes
  195. Transcendent Sound Mini-Beast
  196. A Question About Positive Feedback
  197. Help with opera consonance M100plus
  198. Just received 2x PT Choke OT. best implementation ?
  199. Just received 2x PT Choke OT. best implementation ?
  200. Mystery Valve ID
  201. Oddball OT with extra secondary winding
  202. Help with Multi Section Can Cap replacement
  203. 600V bench variable supply to test transmitting valves
  204. Heater-cathode voltage spec interpretation
  205. Tell me why this wont work.
  206. headphone amp for Senns HD600
  207. Transformer orientation and suggestions.
  208. 12AU7 stereo SE mini-amp build!
  209. allen type 20a schematic
  210. 2010 lemon year for EH 6922 tubes
  211. Chinese GU50 PP
  212. Gain, Vpp and attenuation at each stage
  213. 6n14p headphone amp
  214. Heater Lifter
  215. KT88 & 6550 Pentode power output?
  216. Biasing Improved Williamson
  217. Vox V941 active FX Loop - I'm looking for schematics
  218. Lowering the Volume Control on Tube Amps
  219. Got the Hum out!! Thanks All
  220. How hot KT88 get? Anybody take a reading?
  221. Broskie Unbalancer
  222. Phase splitting transformer design
  223. Red plate KT88
  224. 6N16B preamp
  225. Eimac 450th nos
  226. how much clearance above tubes for KT88 enclosure
  227. Cathode preheating???
  228. RIAA Question - Power
  229. Linearity of Red RCA 5692
  230. What gauge enclosure for KT88 AMP?
  231. Output Transformer Issue???
  232. Maggie 8802 placement issue
  233. Can you recommend a tube tester?
  234. 6550 tube protection socket
  235. PT laminations are usable as OT laminations ?
  236. Are These Authentic Russian Military 1578 Vacuum Tubes?
  237. Amp ID Please
  238. Help for Main Transformer Spec for CCDA
  239. Switching SE and balanced inputs/outputs
  240. kt88 PP rectifier.
  241. How much Blue glow is ok?
  242. Recommendations on How To mono a pre amplifier?
  243. 6H6pi curves available?
  244. 1p24b
  245. help, Built from scratch Kalamazoo 2 noise
  246. 5CZ5/5BQ7A single ended amp
  247. Hopefully a simple question.
  248. 211 tube recommendations
  249. Need HELP with TUBE IMP
  250. Another unknown tube

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