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  1. all-octal schaded pp
  2. Strange Noise From Amp
  3. Missing components
  4. Tube headphone amplifier.
  5. Emission - Double Triode
  6. Convergent Audio Technology - where is their Hompage?
  7. Mesh Plate
  8. Cathode follower question
  9. Power supply question
  10. Looking for a 866a powersupply schematic
  11. 211 or 845 project
  12. Modify Dynaco MKIII to use 6AR6s ?
  13. Yet another Dyna ST-70 Input Board
  14. Free Download Vacuum Tube Design Book
  15. driver stage for ppp 6550's
  16. power supply problem
  17. Positive/Negative Feedback
  18. Unholy Alliance Phono Amp
  19. Shrink a tube amp
  20. lampizator srpp help
  21. the secret of best preamplifier
  22. HELP to ID push pull/Single Ende
  23. 12BH7,6414,and 12AT7 to drive EL34 better
  24. Testing Tube Amplifiers
  25. trade off higher HT current for lower filament current ?
  26. Any Russian analog of 12BY7 ?
  27. SV572-10 still being made?
  28. PP Output Transformer Testing Puzzle
  29. baby steps
  30. Partial FB: 2 SE + 1 PI = PP?
  31. G-807=807 SE or PP?
  32. 1Hz oscillation with CCS biased output valves
  33. Ultra-linear 6L6 output stage
  34. Transformer or capacitor coupling?
  35. Victor (JVC) Tube Amp MCM-200
  36. MiniWatt N3 problems, oscillation thumping and RF/motor problems.
  37. A2293 pins connection, help !!!
  38. Start-Up Delay for tube amp !
  39. Getting OPT in Japan?
  40. cathode follower tube buffer using 6n6p
  41. Buzz at output until tubes conduct
  42. I need help for amps.
  43. UL Connection results in higher distortion
  44. Header bypass Cap?
  45. DC heater large cap
  46. How to lower preamp output?
  47. Why use a pre amplifier
  48. DHT-buffered NOS-dac
  49. Microphonics 12AY7 v.s. 12AX7
  50. ECC99/2A3 interstage finished, but have one query
  51. Tube lovers in Germany?
  52. preamplifier
  53. Choosing grid leak resistor value -- partly subjective?
  54. What does the acronym "AMW" stand for?
  55. 6C33C distortion spectrum
  56. 6C33C OTL DC schematic needed
  57. help with identifying the cause of preamp problem
  58. Rosenblit 70w Mac amp
  59. Grounding scheme
  60. CC vs Shunt filament supply?
  61. Need opinions on boxing a dual mono line stage
  62. Lets settle the b+ on cold tubes issue!
  63. New 2A3 SET / Simple, but gentle sounding amplifier
  64. Magnavox Console Amp Chassis
  65. transformer identification
  66. 50Wrms audio amplifier
  67. 12B4 have a good sound ???
  68. almarro OPT question
  69. Best EL84pp kit??
  70. Clarion 6L6G Oscillator Amp.
  71. Did you hear an original tube sound?
  72. Designing an OTL / Circlotron
  73. Cayin A55t or AudioSpace AS-8i Mk.III
  74. filament voltage question
  75. 7236 vs 6AS7 ?
  76. Bias Circuit Calculation
  77. 6V6 Hum Issues
  78. Crossover co-axial
  79. Wurlitzer 6420 to audio amplifiers
  80. Advice on Parafeed Output Transformer
  81. mingda mc34ab mods?
  82. small and cheap OTL schematic needed
  83. ecl82 or ecl86 amplifier decision
  84. Well Here Goes... K16LS in Dynaco Chassis?
  85. Not too often you see one of those
  86. Sweet Peach vs Meng Yue EL84
  87. Attempt at giving back: 6L6GC SE amplifier
  88. Best Complete KT88 Amp Kit under $1K?
  89. Webcor Musicale OT puzzle
  90. Audio Research SP3a
  91. Preamp Conordīs with some malfunctioning
  92. Oscillating PSU above certain voltage
  93. B+ voltage load line question
  94. ming da tube amp smell
  95. Rebuilding my amp, would like some input.
  96. do any of these cv4024s seem genuine to you?
  97. Stupid question: EL34 tubes.
  98. PP with Unbalanced concertina = 2nd H?
  99. harmonic distortion
  100. Enhanced Tube's performance
  101. New GU50 SE: SRRP or Cascode for driver?
  102. Hivac XN11 tubes
  103. Conrad Johnson PV-10a hum. Any advice?
  104. Bob Carver's eye candy on eBay
  105. MFA Lumi started "motor-boating" today
  106. New GM70 tube with problem
  107. Interested in building together a 300B tube amp?
  108. cayin a-55t want to use el34
  109. Mc240
  110. Dht ?
  111. too much output impedance?
  112. College-proofing an ST-70 (aka autobias+ST-70)
  113. reverse polarity of the chinese goods?
  114. 6bg6 and 8k opt power amp project
  115. Need some calculation assist for a psu
  116. Baldwin Transformer Swap
  117. THD, s/n and IM noisy measurements
  118. Little dot 2+, got spark
  119. (INDIA) urgent - high-quality amp builders/techs in Delhi?
  120. What causes saturation in tubes?
  121. Plug and Play Power Supply
  122. GE 5814 and 12AUCIFTE
  123. Amplifier oscillates - advice sought
  124. 50s Amplifier
  125. power supply design question 832A amp
  126. Klimo power supply advice
  127. Earth Not Connected
  128. DC heater supply for phono pre
  129. Audio Note P2SE problem
  130. Aikido Transformers - Good Choice?
  131. Caps before or after MOSFET V-regulator
  132. Which capacitors should I replace?
  133. Testing Amplifiers
  134. Choosing choke valuein pre amp tube
  135. Supertriode with PNP transistors
  136. too much gain
  137. Lloyd's Vintage High Fidelity Audio Devices - both Tube and Solid State
  138. Cheap eBay "zoe_tsan" tube kits - worth anything?
  139. Bell Vintage High Fidelity Audio Devices - both Tube and Solid State
  140. Small Tube Amp with Hum
  141. tube rectifier question
  142. Unison Research S6 schematics
  143. vacuum tube amplifiers should be produced like this?
  144. 6d22s to 6cj3
  145. pot in tube preamp
  146. Mable Audio vs. Suppo audio sound quality
  147. swdfasdfsdf
  148. measuring heater voltage
  149. Need a circuit around these tubes.
  150. Single-Ended 13E1 amplifier
  151. Whats' the max allowable / reasonable ripple in SE amp?
  152. What amp kits are out there?
  153. ECC84/6N14P for audio
  154. PSU ignorant
  155. How to define a quality OT?
  156. Looking for some build advice
  157. SS CCS and distortion
  158. the valve with no markings
  159. Pentode AB1 design school???
  160. Capability of Sony/Tamradio SE Output Transformers
  161. my CELLINI triode amp
  162. 45-based SET -> Pass Labs F4
  163. Testing Amplifiers - Speaker or dummy load
  164. Quiet amp hums with signal source or input directly tied to star earth??
  165. amp output testing
  166. S5 Amp Comparison?
  167. How to Ground a Preamp PCB Board?
  168. RH807 / 6L6GC g2 issues
  169. 2010: Replacement for Black Gate WKZ 100uF+100uF 500V
  170. Converting Dynaco ST70 Power Transformer for 12.6V
  171. Simple CF with 5687/6900/E182CC
  172. World Audio Design 5881 Schematic needed
  173. PP triode transformer load
  174. 6V6 PP load line
  175. Need help to under stand this 6n3 Kit from ebay
  176. Blown left channel
  177. Tube preamp build help-heaters
  178. Medium Power SET, EL156 based
  179. Concertina Splitter question - Need help
  180. 6V6 amp - schematic options
  181. Lectron pa50+jh50
  182. 4pr60b valve
  183. Transformer phase splitter
  184. Help! ground hum
  185. Question regarding Leak Stereo 20 and 6SN7 line stage preamp
  186. Recommended upgrades for Yaqin Tube Buffer ?
  187. 6J5 or 6S4 mic amp?
  188. ST-70 build, ideas and advice
  189. Yaqin MC-100B Help Needed!
  190. Preamp Aikido : 6ax5GT,12au7,2c51
  191. Heater of tube
  192. R-Core Winders
  193. 1946 philco amp, tuner, record player
  194. otions for drawing tube schematics on Mac..?
  195. Push/Pull Plate Load Choke - how to figure Inductance?
  196. 6aw8-a tube question
  197. Newbie needs a point in the right direction
  198. Minimalist PL519 OTL?
  199. Telefunken schematics
  200. parallel pp EL84
  201. AD1 Operating Question
  202. 6П3С-Е Russian NOS: Gas Problem
  203. Favourite EL34 circuit
  204. Medium power SET with parallel OP tubes
  205. sds labs into Pas3
  206. Low voltage 6922 preamp...wanting a schematic
  207. Voltage Gain on Long Tailed Drivers
  208. Purpose of 5842 tube?!?
  209. MA XDSE KT88 vs YAQIN MC-100B KT88
  210. JBL Amplifier story
  211. Recommended spacing for multiple 5AR4's
  212. Cap choices coupling
  213. Output transformer for PP EL34 source
  214. mini max pre
  215. use 2 ohm speakers
  216. Ask tube rect 5u4c and JJ caps
  217. Adding caps to prevent oscilation in AF 5687
  218. Williamson on EL84. Is it worth doing?
  219. CCS and regulated B+
  220. Garter cross-coupled feedback
  221. soundcard protection Z ???
  222. Using a CCS on SE Output Stage
  223. First amp build... help please!
  224. multiple independent grid biasing from 1 mosfet
  225. Eico HF-81 modification opinion
  226. 4K or 5K Output Transformer
  227. Noisy input on Michaelson & Austin TVA-1
  228. Precision Electronics S-35 help,
  229. Rogers Cadet 3 Problem
  230. Triode Electronics VS Hammond
  231. Triode Operation Using The Screen Grids As The Control Grid - This Work?
  232. Start up delay needed???
  233. Connecting a stereo amp as a mono-block
  234. HQ-DHT (All tube DHT amli) 26-45-2A3
  235. 24A tube in triode mode, help !!!
  236. Need super quiet 6.3V filament supply schematic
  237. (Sound Space)Houston 2A3 Power Amplifier
  238. James Burgess 2A3 Monoblocks
  239. Funny tube tale from southamerica
  240. RCA 7189 Black Plates
  241. Preamp nasty noise and hum
  242. EDCOR VS One Electron
  243. Parallel output tubes/valves in push pull. Advantages/disadvantages?
  244. Robinhood output transformers?
  245. looking for help diagnosing volume loss on tube amplified reel to reel player
  246. Question about power consumption Hagerman Cornet Octal
  247. valve rectifier in PSUD
  248. Can you explain what this is ?
  249. volume rise with frequency problem
  250. 1 + 1 = 3 :)

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