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  1. preamplifier
  2. Choosing grid leak resistor value -- partly subjective?
  3. What does the acronym "AMW" stand for?
  4. 6C33C distortion spectrum
  5. 6C33C OTL DC schematic needed
  6. help with identifying the cause of preamp problem
  7. Rosenblit 70w Mac amp
  8. Grounding scheme
  9. CC vs Shunt filament supply?
  10. Need opinions on boxing a dual mono line stage
  11. Lets settle the b+ on cold tubes issue!
  12. New 2A3 SET / Simple, but gentle sounding amplifier
  13. Magnavox Console Amp Chassis
  14. transformer identification
  15. 50Wrms audio amplifier
  16. 12B4 have a good sound ???
  17. almarro OPT question
  18. Best EL84pp kit??
  19. Clarion 6L6G Oscillator Amp.
  20. Did you hear an original tube sound?
  21. Designing an OTL / Circlotron
  22. Cayin A55t or AudioSpace AS-8i Mk.III
  23. filament voltage question
  24. 7236 vs 6AS7 ?
  25. Bias Circuit Calculation
  26. 6V6 Hum Issues
  27. Crossover co-axial
  28. Wurlitzer 6420 to audio amplifiers
  29. Advice on Parafeed Output Transformer
  30. mingda mc34ab mods?
  31. small and cheap OTL schematic needed
  32. ecl82 or ecl86 amplifier decision
  33. Well Here Goes... K16LS in Dynaco Chassis?
  34. Not too often you see one of those
  35. Sweet Peach vs Meng Yue EL84
  36. Attempt at giving back: 6L6GC SE amplifier
  37. Best Complete KT88 Amp Kit under $1K?
  38. Webcor Musicale OT puzzle
  39. Audio Research SP3a
  40. Preamp Conordīs with some malfunctioning
  41. Oscillating PSU above certain voltage
  42. B+ voltage load line question
  43. ming da tube amp smell
  44. Rebuilding my amp, would like some input.
  45. do any of these cv4024s seem genuine to you?
  46. Stupid question: EL34 tubes.
  47. PP with Unbalanced concertina = 2nd H?
  48. harmonic distortion
  49. Enhanced Tube's performance
  50. New GU50 SE: SRRP or Cascode for driver?
  51. Hivac XN11 tubes
  52. Conrad Johnson PV-10a hum. Any advice?
  53. Bob Carver's eye candy on eBay
  54. MFA Lumi started "motor-boating" today
  55. New GM70 tube with problem
  56. Interested in building together a 300B tube amp?
  57. cayin a-55t want to use el34
  58. Mc240
  59. Dht ?
  60. too much output impedance?
  61. College-proofing an ST-70 (aka autobias+ST-70)
  62. reverse polarity of the chinese goods?
  63. 6bg6 and 8k opt power amp project
  64. Need some calculation assist for a psu
  65. Baldwin Transformer Swap
  66. THD, s/n and IM noisy measurements
  67. Little dot 2+, got spark
  68. (INDIA) urgent - high-quality amp builders/techs in Delhi?
  69. What causes saturation in tubes?
  70. Plug and Play Power Supply
  71. GE 5814 and 12AUCIFTE
  72. Amplifier oscillates - advice sought
  73. 50s Amplifier
  74. power supply design question 832A amp
  75. Klimo power supply advice
  76. Earth Not Connected
  77. DC heater supply for phono pre
  78. Audio Note P2SE problem
  79. Aikido Transformers - Good Choice?
  80. Caps before or after MOSFET V-regulator
  81. Which capacitors should I replace?
  82. Testing Amplifiers
  83. Choosing choke valuein pre amp tube
  84. Supertriode with PNP transistors
  85. too much gain
  86. Lloyd's Vintage High Fidelity Audio Devices - both Tube and Solid State
  87. Cheap eBay "zoe_tsan" tube kits - worth anything?
  88. Bell Vintage High Fidelity Audio Devices - both Tube and Solid State
  89. Small Tube Amp with Hum
  90. tube rectifier question
  91. Unison Research S6 schematics
  92. vacuum tube amplifiers should be produced like this?
  93. 6d22s to 6cj3
  94. pot in tube preamp
  95. Mable Audio vs. Suppo audio sound quality
  96. swdfasdfsdf
  97. measuring heater voltage
  98. Need a circuit around these tubes.
  99. Single-Ended 13E1 amplifier
  100. Whats' the max allowable / reasonable ripple in SE amp?
  101. What amp kits are out there?
  102. ECC84/6N14P for audio
  103. PSU ignorant
  104. How to define a quality OT?
  105. Looking for some build advice
  106. ASC oil caps vs M-tube cap for ps
  107. SS CCS and distortion
  108. the valve with no markings
  109. Pentode AB1 design school???
  110. Capability of Sony/Tamradio SE Output Transformers
  111. my CELLINI triode amp
  112. 45-based SET -> Pass Labs F4
  113. Testing Amplifiers - Speaker or dummy load
  114. Quiet amp hums with signal source or input directly tied to star earth??
  115. amp output testing
  116. S5 Amp Comparison?
  117. How to Ground a Preamp PCB Board?
  118. RH807 / 6L6GC g2 issues
  119. 2010: Replacement for Black Gate WKZ 100uF+100uF 500V
  120. sunn solarus guitar amp
  121. Converting Dynaco ST70 Power Transformer for 12.6V
  122. Simple CF with 5687/6900/E182CC
  123. World Audio Design 5881 Schematic needed
  124. PP triode transformer load
  125. 6V6 PP load line
  126. Need help to under stand this 6n3 Kit from ebay
  127. Help:ampeg svt 2 pro 100v>>240v
  128. Blown left channel
  129. Tube preamp build help-heaters
  130. Medium Power SET, EL156 based
  131. Concertina Splitter question - Need help
  132. 6V6 amp - schematic options
  133. Lectron pa50+jh50
  134. 4pr60b valve
  135. Transformer phase splitter
  136. Help! ground hum
  137. Question regarding Leak Stereo 20 and 6SN7 line stage preamp
  138. Recommended upgrades for Yaqin Tube Buffer ?
  139. 6J5 or 6S4 mic amp?
  140. ST-70 build, ideas and advice
  141. Yaqin MC-100B Help Needed!
  142. Preamp Aikido : 6ax5GT,12au7,2c51
  143. Heater of tube
  144. R-Core Winders
  145. 1946 philco amp, tuner, record player
  146. otions for drawing tube schematics on Mac..?
  147. Push/Pull Plate Load Choke - how to figure Inductance?
  148. 6aw8-a tube question
  149. Newbie needs a point in the right direction
  150. Minimalist PL519 OTL?
  151. Telefunken schematics
  152. parallel pp EL84
  153. AD1 Operating Question
  154. 6П3С-Е Russian NOS: Gas Problem
  155. Favourite EL34 circuit
  156. Medium power SET with parallel OP tubes
  157. sds labs into Pas3
  158. Low voltage 6922 preamp...wanting a schematic
  159. Voltage Gain on Long Tailed Drivers
  160. Purpose of 5842 tube?!?
  161. MA XDSE KT88 vs YAQIN MC-100B KT88
  162. JBL Amplifier story
  163. Fender tweed pro-amp clone
  164. Recommended spacing for multiple 5AR4's
  165. Cap choices coupling
  166. Output transformer for PP EL34 source
  167. mini max pre
  168. use 2 ohm speakers
  169. Ask tube rect 5u4c and JJ caps
  170. Adding caps to prevent oscilation in AF 5687
  171. Williamson on EL84. Is it worth doing?
  172. CCS and regulated B+
  173. Garter cross-coupled feedback
  174. soundcard protection Z ???
  175. Using a CCS on SE Output Stage
  176. First amp build... help please!
  177. multiple independent grid biasing from 1 mosfet
  178. Eico HF-81 modification opinion
  179. 4K or 5K Output Transformer
  180. Noisy input on Michaelson & Austin TVA-1
  181. Precision Electronics S-35 help,
  182. Rogers Cadet 3 Problem
  183. Triode Electronics VS Hammond
  184. TRIODE OPERATION USING THE SCREEN GRIDS AS THE CONTROL GRID - this work ?
  185. Start up delay needed???
  186. Connecting a stereo amp as a mono-block
  187. HQ-DHT (All tube DHT amli) 26-45-2A3
  188. 24A tube in triode mode, help !!!
  189. Amperite Ballast
  190. Need super quiet 6.3V filament supply schematic
  191. (Sound Space)Houston 2A3 Power Amplifier
  192. James Burgess 2A3 Monoblocks
  193. Funny tube tale from southamerica
  194. RCA 7189 Black Plates
  195. Preamp nasty noise and hum
  196. EDCOR VS One Electron
  197. Parallel output tubes/valves in push pull. Advantages/disadvantages?
  198. Robinhood output transformers?
  199. looking for help diagnosing volume loss on tube amplified reel to reel player
  200. Question about power consumption Hagerman Cornet Octal
  201. valve rectifier in PSUD
  202. Can you explain what this is ?
  203. volume rise with frequency problem
  204. 1 + 1 = 3 :)
  205. What would the perfect multi-way speaker for a tube amp look like?
  206. GU50 compared with EL84
  207. Counterpoint SA-4 manual and schematics
  208. Ever heard of a Valvo 16ECC ?
  209. the Reversal SRPP
  210. Want to build a C3G linestage
  211. 30A5 tubes
  212. Good speakers to match a K-12
  213. Driving Long Cables, how much current?
  214. twin triode question
  215. Am I going to blow up my 7189s
  216. How is wattage calculated when only using a single section?
  217. Counterpoint SA5 problems and a question.
  218. Headphone Amplifier 6922EH
  219. Fuse Clip for Small Plate Cap Use
  220. Advice sought on medium power triode for tube headphone amplifier
  221. Not the 111M; A Precise 116 Tube Tester
  222. Input stage
  223. Does anyone have any FFT plots from real Class-AB tube amps?
  224. Testing for a Damaged Output Trafo
  225. What has happened to WE Huntsville lately?
  226. Output Transformers Sun HCT 1003 KT
  227. Plexiglass case for small tubes?
  228. 100 Best Sound Tubes
  229. Input tube bias
  230. eschematic amplifier sinle end 12at7 6av6 6bq5
  231. Wiring - Audio Note Transformer Parallel Single-Ended 300B
  232. HV using zener diode
  233. Akai M8 rebuild up and running!
  234. Best current production 2a3
  235. what happens when plugging a stereo source into mono jack on a tube amp?
  236. Transformer coupled Gainclone idea.
  237. Audio Research VT100
  238. output transformer turns per volt
  239. valves and metal cones= bad mating?
  240. Why do you need a grid to ground resistor on a line stage?
  241. Need some help with RIAA Preamp
  242. Swapping transformer cores
  243. got hold of a bunch of tubes...
  244. output transformer secondary configuration
  245. WE/Ultrapath B+ Where?
  246. Blending 12ax7 parallel gain stages
  247. Sudden spark.
  248. Priboj Reborn
  249. Misunderstand of sijosae schematic
  250. 12AX7 Identification

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