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  1. Looking for a Williamson squematics
  2. Magnavox Console Speaker Impedances
  3. first tube amp
  4. Beam Triodes
  5. Winding output transformers
  6. Anyone Have a Schematic for Wavac MD300B?
  7. PushPull vs ParalelSE
  8. Painting transformer end bells
  9. all-octal schaded pp
  10. New Wood Chassis from Hammond
  11. Strange Noise From Amp
  12. Missing components
  13. Tube headphone amplifier.
  14. Emission - Double Triode
  15. Convergent Audio Technology - where is their Hompage?
  16. Mesh Plate
  17. Cathode follower question
  18. Power supply question
  19. Looking for a 866a powersupply schematic
  20. 211 or 845 project
  21. Modify Dynaco MKIII to use 6AR6s ?
  22. Yet another Dyna ST-70 Input Board
  23. Free Download Vacuum Tube Design Book
  24. driver stage for ppp 6550's
  25. power supply problem
  26. Positive/Negative Feedback
  27. Unholy Alliance Phono Amp
  28. Shrink a tube amp
  29. lampizator srpp help
  30. the secret of best preamplifier
  31. Any issues with adding a grounded power cord to a Heathkit IT-17 tube tester?
  32. HELP to ID push pull/Single Ende
  33. 12BH7,6414,and 12AT7 to drive EL34 better
  34. Testing Tube Amplifiers
  35. trade off higher HT current for lower filament current ?
  36. Any Russian analog of 12BY7 ?
  37. SV572-10 still being made?
  38. PP Output Transformer Testing Puzzle
  39. baby steps
  40. Partial FB: 2 SE + 1 PI = PP?
  41. G-807=807 SE or PP?
  42. 1Hz oscillation with CCS biased output valves
  43. Ultra-linear 6L6 output stage
  44. Transformer or capacitor coupling?
  45. Victor (JVC) Tube Amp MCM-200
  46. MiniWatt N3 problems, oscillation thumping and RF/motor problems.
  47. A2293 pins connection, help !!!
  48. Start-Up Delay for tube amp !
  49. Getting OPT in Japan?
  50. cathode follower tube buffer using 6n6p
  51. Buzz at output until tubes conduct
  52. I need help for amps.
  53. UL Connection results in higher distortion
  54. Header bypass Cap?
  55. DC heater large cap
  56. How to lower preamp output?
  57. Why use a pre amplifier
  58. DHT-buffered NOS-dac
  59. Microphonics 12AY7 v.s. 12AX7
  60. ECC99/2A3 interstage finished, but have one query
  61. Tube lovers in Germany?
  62. preamplifier
  63. Choosing grid leak resistor value -- partly subjective?
  64. What does the acronym "AMW" stand for?
  65. 6C33C distortion spectrum
  66. 6C33C OTL DC schematic needed
  67. help with identifying the cause of preamp problem
  68. Rosenblit 70w Mac amp
  69. Grounding scheme
  70. CC vs Shunt filament supply?
  71. Need opinions on boxing a dual mono line stage
  72. Lets settle the b+ on cold tubes issue!
  73. New 2A3 SET / Simple, but gentle sounding amplifier
  74. Magnavox Console Amp Chassis
  75. transformer identification
  76. 50Wrms audio amplifier
  77. 12B4 have a good sound ???
  78. almarro OPT question
  79. Best EL84pp kit??
  80. Clarion 6L6G Oscillator Amp.
  81. Did you hear an original tube sound?
  82. Designing an OTL / Circlotron
  83. Cayin A55t or AudioSpace AS-8i Mk.III
  84. filament voltage question
  85. 7236 vs 6AS7 ?
  86. Bias Circuit Calculation
  87. 6V6 Hum Issues
  88. Crossover co-axial
  89. Wurlitzer 6420 to audio amplifiers
  90. Advice on Parafeed Output Transformer
  91. mingda mc34ab mods?
  92. small and cheap OTL schematic needed
  93. ecl82 or ecl86 amplifier decision
  94. Well Here Goes... K16LS in Dynaco Chassis?
  95. Not too often you see one of those
  96. Sweet Peach vs Meng Yue EL84
  97. Attempt at giving back: 6L6GC SE amplifier
  98. Best Complete KT88 Amp Kit under $1K?
  99. Webcor Musicale OT puzzle
  100. Audio Research SP3a
  101. Preamp Conordīs with some malfunctioning
  102. Oscillating PSU above certain voltage
  103. B+ voltage load line question
  104. ming da tube amp smell
  105. Rebuilding my amp, would like some input.
  106. do any of these cv4024s seem genuine to you?
  107. Stupid question: EL34 tubes.
  108. PP with Unbalanced concertina = 2nd H?
  109. harmonic distortion
  110. Enhanced Tube's performance
  111. New GU50 SE: SRRP or Cascode for driver?
  112. Hivac XN11 tubes
  113. Conrad Johnson PV-10a hum. Any advice?
  114. Bob Carver's eye candy on eBay
  115. MFA Lumi started "motor-boating" today
  116. New GM70 tube with problem
  117. Interested in building together a 300B tube amp?
  118. cayin a-55t want to use el34
  119. Mc240
  120. Dht ?
  121. too much output impedance?
  122. College-proofing an ST-70 (aka autobias+ST-70)
  123. reverse polarity of the chinese goods?
  124. 6bg6 and 8k opt power amp project
  125. Need some calculation assist for a psu
  126. Baldwin Transformer Swap
  127. THD, s/n and IM noisy measurements
  128. Little dot 2+, got spark
  129. (INDIA) urgent - high-quality amp builders/techs in Delhi?
  130. What causes saturation in tubes?
  131. Plug and Play Power Supply
  132. GE 5814 and 12AUCIFTE
  133. Amplifier oscillates - advice sought
  134. 50s Amplifier
  135. power supply design question 832A amp
  136. Klimo power supply advice
  137. Earth Not Connected
  138. DC heater supply for phono pre
  139. Audio Note P2SE problem
  140. Aikido Transformers - Good Choice?
  141. Caps before or after MOSFET V-regulator
  142. Which capacitors should I replace?
  143. Testing Amplifiers
  144. Choosing choke valuein pre amp tube
  145. Supertriode with PNP transistors
  146. too much gain
  147. Lloyd's Vintage High Fidelity Audio Devices - both Tube and Solid State
  148. Cheap eBay "zoe_tsan" tube kits - worth anything?
  149. Bell Vintage High Fidelity Audio Devices - both Tube and Solid State
  150. Small Tube Amp with Hum
  151. tube rectifier question
  152. Unison Research S6 schematics
  153. vacuum tube amplifiers should be produced like this?
  154. 6d22s to 6cj3
  155. pot in tube preamp
  156. Mable Audio vs. Suppo audio sound quality
  157. swdfasdfsdf
  158. measuring heater voltage
  159. Need a circuit around these tubes.
  160. Single-Ended 13E1 amplifier
  161. Whats' the max allowable / reasonable ripple in SE amp?
  162. What amp kits are out there?
  163. ECC84/6N14P for audio
  164. PSU ignorant
  165. How to define a quality OT?
  166. Looking for some build advice
  167. ASC oil caps vs M-tube cap for ps
  168. SS CCS and distortion
  169. the valve with no markings
  170. Pentode AB1 design school???
  171. Capability of Sony/Tamradio SE Output Transformers
  172. my CELLINI triode amp
  173. 45-based SET -> Pass Labs F4
  174. Testing Amplifiers - Speaker or dummy load
  175. Quiet amp hums with signal source or input directly tied to star earth??
  176. amp output testing
  177. S5 Amp Comparison?
  178. How to Ground a Preamp PCB Board?
  179. RH807 / 6L6GC g2 issues
  180. 2010: Replacement for Black Gate WKZ 100uF+100uF 500V
  181. sunn solarus guitar amp
  182. Converting Dynaco ST70 Power Transformer for 12.6V
  183. Simple CF with 5687/6900/E182CC
  184. World Audio Design 5881 Schematic needed
  185. PP triode transformer load
  186. 6V6 PP load line
  187. Need help to under stand this 6n3 Kit from ebay
  188. Help:ampeg svt 2 pro 100v>>240v
  189. Blown left channel
  190. Tube preamp build help-heaters
  191. Medium Power SET, EL156 based
  192. Concertina Splitter question - Need help
  193. 6V6 amp - schematic options
  194. Lectron pa50+jh50
  195. 4pr60b valve
  196. Transformer phase splitter
  197. Help! ground hum
  198. Question regarding Leak Stereo 20 and 6SN7 line stage preamp
  199. Recommended upgrades for Yaqin Tube Buffer ?
  200. 6J5 or 6S4 mic amp?
  201. ST-70 build, ideas and advice
  202. Yaqin MC-100B Help Needed!
  203. Preamp Aikido : 6ax5GT,12au7,2c51
  204. Heater of tube
  205. R-Core Winders
  206. 1946 philco amp, tuner, record player
  207. otions for drawing tube schematics on Mac..?
  208. Push/Pull Plate Load Choke - how to figure Inductance?
  209. 6aw8-a tube question
  210. Newbie needs a point in the right direction
  211. Minimalist PL519 OTL?
  212. Telefunken schematics
  213. parallel pp EL84
  214. AD1 Operating Question
  215. 6П3С-Е Russian NOS: Gas Problem
  216. Favourite EL34 circuit
  217. Medium power SET with parallel OP tubes
  218. sds labs into Pas3
  219. Low voltage 6922 preamp...wanting a schematic
  220. Voltage Gain on Long Tailed Drivers
  221. Purpose of 5842 tube?!?
  222. MA XDSE KT88 vs YAQIN MC-100B KT88
  223. JBL Amplifier story
  224. Fender tweed pro-amp clone
  225. Recommended spacing for multiple 5AR4's
  226. Cap choices coupling
  227. Output transformer for PP EL34 source
  228. mini max pre
  229. use 2 ohm speakers
  230. Ask tube rect 5u4c and JJ caps
  231. Adding caps to prevent oscilation in AF 5687
  232. Williamson on EL84. Is it worth doing?
  233. CCS and regulated B+
  234. Garter cross-coupled feedback
  235. soundcard protection Z ???
  236. Using a CCS on SE Output Stage
  237. First amp build... help please!
  238. multiple independent grid biasing from 1 mosfet
  239. Eico HF-81 modification opinion
  240. 4K or 5K Output Transformer
  241. Noisy input on Michaelson & Austin TVA-1
  242. Precision Electronics S-35 help,
  243. Rogers Cadet 3 Problem
  244. Triode Electronics VS Hammond
  245. TRIODE OPERATION USING THE SCREEN GRIDS AS THE CONTROL GRID - this work ?
  246. Start up delay needed???
  247. Connecting a stereo amp as a mono-block
  248. HQ-DHT (All tube DHT amli) 26-45-2A3
  249. 24A tube in triode mode, help !!!
  250. Amperite Ballast

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