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  1. Beam Triodes
  2. Winding output transformers
  3. Anyone Have a Schematic for Wavac MD300B?
  4. PushPull vs ParalelSE
  5. Painting transformer end bells
  6. all-octal schaded pp
  7. New Wood Chassis from Hammond
  8. Strange Noise From Amp
  9. Missing components
  10. Tube headphone amplifier.
  11. Emission - Double Triode
  12. Convergent Audio Technology - where is their Hompage?
  13. Mesh Plate
  14. Cathode follower question
  15. Power supply question
  16. Looking for a 866a powersupply schematic
  17. 211 or 845 project
  18. Modify Dynaco MKIII to use 6AR6s ?
  19. Yet another Dyna ST-70 Input Board
  20. Free Download Vacuum Tube Design Book
  21. driver stage for ppp 6550's
  22. power supply problem
  23. Positive/Negative Feedback
  24. Unholy Alliance Phono Amp
  25. Shrink a tube amp
  26. lampizator srpp help
  27. the secret of best preamplifier
  28. Any issues with adding a grounded power cord to a Heathkit IT-17 tube tester?
  29. HELP to ID push pull/Single Ende
  30. 12BH7,6414,and 12AT7 to drive EL34 better
  31. Testing Tube Amplifiers
  32. trade off higher HT current for lower filament current ?
  33. Any Russian analog of 12BY7 ?
  34. SV572-10 still being made?
  35. PP Output Transformer Testing Puzzle
  36. baby steps
  37. Partial FB: 2 SE + 1 PI = PP?
  38. G-807=807 SE or PP?
  39. 1Hz oscillation with CCS biased output valves
  40. Ultra-linear 6L6 output stage
  41. Transformer or capacitor coupling?
  42. Victor (JVC) Tube Amp MCM-200
  43. MiniWatt N3 problems, oscillation thumping and RF/motor problems.
  44. A2293 pins connection, help !!!
  45. Start-Up Delay for tube amp !
  46. Getting OPT in Japan?
  47. cathode follower tube buffer using 6n6p
  48. Buzz at output until tubes conduct
  49. I need help for amps.
  50. UL Connection results in higher distortion
  51. Header bypass Cap?
  52. DC heater large cap
  53. How to lower preamp output?
  54. Why use a pre amplifier
  55. DHT-buffered NOS-dac
  56. Microphonics 12AY7 v.s. 12AX7
  57. ECC99/2A3 interstage finished, but have one query
  58. Tube lovers in Germany?
  59. preamplifier
  60. Choosing grid leak resistor value -- partly subjective?
  61. What does the acronym "AMW" stand for?
  62. 6C33C distortion spectrum
  63. 6C33C OTL DC schematic needed
  64. help with identifying the cause of preamp problem
  65. Rosenblit 70w Mac amp
  66. Grounding scheme
  67. CC vs Shunt filament supply?
  68. Need opinions on boxing a dual mono line stage
  69. Lets settle the b+ on cold tubes issue!
  70. New 2A3 SET / Simple, but gentle sounding amplifier
  71. Magnavox Console Amp Chassis
  72. transformer identification
  73. 50Wrms audio amplifier
  74. 12B4 have a good sound ???
  75. almarro OPT question
  76. Best EL84pp kit??
  77. Clarion 6L6G Oscillator Amp.
  78. Did you hear an original tube sound?
  79. Designing an OTL / Circlotron
  80. Cayin A55t or AudioSpace AS-8i Mk.III
  81. filament voltage question
  82. 7236 vs 6AS7 ?
  83. Bias Circuit Calculation
  84. 6V6 Hum Issues
  85. Crossover co-axial
  86. Wurlitzer 6420 to audio amplifiers
  87. Advice on Parafeed Output Transformer
  88. mingda mc34ab mods?
  89. small and cheap OTL schematic needed
  90. ecl82 or ecl86 amplifier decision
  91. Well Here Goes... K16LS in Dynaco Chassis?
  92. Not too often you see one of those
  93. Sweet Peach vs Meng Yue EL84
  94. Attempt at giving back: 6L6GC SE amplifier
  95. Best Complete KT88 Amp Kit under $1K?
  96. Webcor Musicale OT puzzle
  97. Audio Research SP3a
  98. Preamp Conordīs with some malfunctioning
  99. Oscillating PSU above certain voltage
  100. B+ voltage load line question
  101. ming da tube amp smell
  102. Rebuilding my amp, would like some input.
  103. do any of these cv4024s seem genuine to you?
  104. Stupid question: EL34 tubes.
  105. PP with Unbalanced concertina = 2nd H?
  106. harmonic distortion
  107. Enhanced Tube's performance
  108. New GU50 SE: SRRP or Cascode for driver?
  109. Hivac XN11 tubes
  110. Conrad Johnson PV-10a hum. Any advice?
  111. Bob Carver's eye candy on eBay
  112. MFA Lumi started "motor-boating" today
  113. New GM70 tube with problem
  114. Interested in building together a 300B tube amp?
  115. cayin a-55t want to use el34
  116. Mc240
  117. Dht ?
  118. too much output impedance?
  119. College-proofing an ST-70 (aka autobias+ST-70)
  120. reverse polarity of the chinese goods?
  121. 6bg6 and 8k opt power amp project
  122. Need some calculation assist for a psu
  123. Baldwin Transformer Swap
  124. THD, s/n and IM noisy measurements
  125. Little dot 2+, got spark
  126. (INDIA) urgent - high-quality amp builders/techs in Delhi?
  127. What causes saturation in tubes?
  128. Plug and Play Power Supply
  129. GE 5814 and 12AUCIFTE
  130. Amplifier oscillates - advice sought
  131. 50s Amplifier
  132. power supply design question 832A amp
  133. Klimo power supply advice
  134. Earth Not Connected
  135. DC heater supply for phono pre
  136. Audio Note P2SE problem
  137. Aikido Transformers - Good Choice?
  138. Caps before or after MOSFET V-regulator
  139. Which capacitors should I replace?
  140. Testing Amplifiers
  141. Choosing choke valuein pre amp tube
  142. Supertriode with PNP transistors
  143. too much gain
  144. Lloyd's Vintage High Fidelity Audio Devices - both Tube and Solid State
  145. Cheap eBay "zoe_tsan" tube kits - worth anything?
  146. Bell Vintage High Fidelity Audio Devices - both Tube and Solid State
  147. Small Tube Amp with Hum
  148. tube rectifier question
  149. Unison Research S6 schematics
  150. vacuum tube amplifiers should be produced like this?
  151. 6d22s to 6cj3
  152. pot in tube preamp
  153. Mable Audio vs. Suppo audio sound quality
  154. swdfasdfsdf
  155. measuring heater voltage
  156. Need a circuit around these tubes.
  157. Single-Ended 13E1 amplifier
  158. Whats' the max allowable / reasonable ripple in SE amp?
  159. What amp kits are out there?
  160. ECC84/6N14P for audio
  161. PSU ignorant
  162. How to define a quality OT?
  163. Looking for some build advice
  164. ASC oil caps vs M-tube cap for ps
  165. SS CCS and distortion
  166. the valve with no markings
  167. Pentode AB1 design school???
  168. Capability of Sony/Tamradio SE Output Transformers
  169. my CELLINI triode amp
  170. 45-based SET -> Pass Labs F4
  171. Testing Amplifiers - Speaker or dummy load
  172. Quiet amp hums with signal source or input directly tied to star earth??
  173. amp output testing
  174. S5 Amp Comparison?
  175. How to Ground a Preamp PCB Board?
  176. RH807 / 6L6GC g2 issues
  177. 2010: Replacement for Black Gate WKZ 100uF+100uF 500V
  178. sunn solarus guitar amp
  179. Converting Dynaco ST70 Power Transformer for 12.6V
  180. Simple CF with 5687/6900/E182CC
  181. World Audio Design 5881 Schematic needed
  182. PP triode transformer load
  183. 6V6 PP load line
  184. Need help to under stand this 6n3 Kit from ebay
  185. Help:ampeg svt 2 pro 100v>>240v
  186. Blown left channel
  187. Tube preamp build help-heaters
  188. Medium Power SET, EL156 based
  189. Concertina Splitter question - Need help
  190. 6V6 amp - schematic options
  191. Lectron pa50+jh50
  192. 4pr60b valve
  193. Transformer phase splitter
  194. Help! ground hum
  195. Question regarding Leak Stereo 20 and 6SN7 line stage preamp
  196. Recommended upgrades for Yaqin Tube Buffer ?
  197. 6J5 or 6S4 mic amp?
  198. ST-70 build, ideas and advice
  199. Yaqin MC-100B Help Needed!
  200. Preamp Aikido : 6ax5GT,12au7,2c51
  201. Heater of tube
  202. R-Core Winders
  203. 1946 philco amp, tuner, record player
  204. otions for drawing tube schematics on Mac..?
  205. Push/Pull Plate Load Choke - how to figure Inductance?
  206. 6aw8-a tube question
  207. Newbie needs a point in the right direction
  208. Minimalist PL519 OTL?
  209. Telefunken schematics
  210. parallel pp EL84
  211. AD1 Operating Question
  212. 6П3С-Е Russian NOS: Gas Problem
  213. Favourite EL34 circuit
  214. Medium power SET with parallel OP tubes
  215. sds labs into Pas3
  216. Low voltage 6922 preamp...wanting a schematic
  217. Voltage Gain on Long Tailed Drivers
  218. Purpose of 5842 tube?!?
  219. MA XDSE KT88 vs YAQIN MC-100B KT88
  220. JBL Amplifier story
  221. Fender tweed pro-amp clone
  222. Recommended spacing for multiple 5AR4's
  223. Cap choices coupling
  224. Output transformer for PP EL34 source
  225. mini max pre
  226. use 2 ohm speakers
  227. Ask tube rect 5u4c and JJ caps
  228. Adding caps to prevent oscilation in AF 5687
  229. Williamson on EL84. Is it worth doing?
  230. CCS and regulated B+
  231. Garter cross-coupled feedback
  232. soundcard protection Z ???
  233. Using a CCS on SE Output Stage
  234. First amp build... help please!
  235. multiple independent grid biasing from 1 mosfet
  236. Eico HF-81 modification opinion
  237. 4K or 5K Output Transformer
  238. Noisy input on Michaelson & Austin TVA-1
  239. Precision Electronics S-35 help,
  240. Rogers Cadet 3 Problem
  241. Triode Electronics VS Hammond
  242. TRIODE OPERATION USING THE SCREEN GRIDS AS THE CONTROL GRID - this work ?
  243. Start up delay needed???
  244. Connecting a stereo amp as a mono-block
  245. HQ-DHT (All tube DHT amli) 26-45-2A3
  246. 24A tube in triode mode, help !!!
  247. Amperite Ballast
  248. Need super quiet 6.3V filament supply schematic
  249. (Sound Space)Houston 2A3 Power Amplifier
  250. James Burgess 2A3 Monoblocks

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