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

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