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  1. Wurlitzer 6420 to audio amplifiers
  2. Advice on Parafeed Output Transformer
  3. mingda mc34ab mods?
  4. small and cheap OTL schematic needed
  5. ecl82 or ecl86 amplifier decision
  6. Well Here Goes... K16LS in Dynaco Chassis?
  7. Not too often you see one of those
  8. Sweet Peach vs Meng Yue EL84
  9. Attempt at giving back: 6L6GC SE amplifier
  10. Best Complete KT88 Amp Kit under $1K?
  11. Webcor Musicale OT puzzle
  12. Audio Research SP3a
  13. Preamp Conordīs with some malfunctioning
  14. Oscillating PSU above certain voltage
  15. B+ voltage load line question
  16. ming da tube amp smell
  17. Rebuilding my amp, would like some input.
  18. do any of these cv4024s seem genuine to you?
  19. Stupid question: EL34 tubes.
  20. PP with Unbalanced concertina = 2nd H?
  21. harmonic distortion
  22. Enhanced Tube's performance
  23. New GU50 SE: SRRP or Cascode for driver?
  24. Hivac XN11 tubes
  25. Conrad Johnson PV-10a hum. Any advice?
  26. Bob Carver's eye candy on eBay
  27. MFA Lumi started "motor-boating" today
  28. New GM70 tube with problem
  29. Interested in building together a 300B tube amp?
  30. cayin a-55t want to use el34
  31. Mc240
  32. Dht ?
  33. too much output impedance?
  34. College-proofing an ST-70 (aka autobias+ST-70)
  35. reverse polarity of the chinese goods?
  36. 6bg6 and 8k opt power amp project
  37. Need some calculation assist for a psu
  38. Baldwin Transformer Swap
  39. THD, s/n and IM noisy measurements
  40. Little dot 2+, got spark
  41. (INDIA) urgent - high-quality amp builders/techs in Delhi?
  42. What causes saturation in tubes?
  43. Plug and Play Power Supply
  44. GE 5814 and 12AUCIFTE
  45. Amplifier oscillates - advice sought
  46. 50s Amplifier
  47. power supply design question 832A amp
  48. Klimo power supply advice
  49. Earth Not Connected
  50. DC heater supply for phono pre
  51. Audio Note P2SE problem
  52. Aikido Transformers - Good Choice?
  53. Caps before or after MOSFET V-regulator
  54. Which capacitors should I replace?
  55. Testing Amplifiers
  56. Choosing choke valuein pre amp tube
  57. Supertriode with PNP transistors
  58. too much gain
  59. Lloyd's Vintage High Fidelity Audio Devices - both Tube and Solid State
  60. Cheap eBay "zoe_tsan" tube kits - worth anything?
  61. Bell Vintage High Fidelity Audio Devices - both Tube and Solid State
  62. Small Tube Amp with Hum
  63. tube rectifier question
  64. Unison Research S6 schematics
  65. vacuum tube amplifiers should be produced like this?
  66. 6d22s to 6cj3
  67. pot in tube preamp
  68. Mable Audio vs. Suppo audio sound quality
  69. swdfasdfsdf
  70. measuring heater voltage
  71. Need a circuit around these tubes.
  72. Single-Ended 13E1 amplifier
  73. Whats' the max allowable / reasonable ripple in SE amp?
  74. What amp kits are out there?
  75. ECC84/6N14P for audio
  76. PSU ignorant
  77. How to define a quality OT?
  78. Looking for some build advice
  79. ASC oil caps vs M-tube cap for ps
  80. SS CCS and distortion
  81. the valve with no markings
  82. Pentode AB1 design school???
  83. Capability of Sony/Tamradio SE Output Transformers
  84. my CELLINI triode amp
  85. 45-based SET -> Pass Labs F4
  86. Testing Amplifiers - Speaker or dummy load
  87. Quiet amp hums with signal source or input directly tied to star earth??
  88. amp output testing
  89. S5 Amp Comparison?
  90. How to Ground a Preamp PCB Board?
  91. RH807 / 6L6GC g2 issues
  92. 2010: Replacement for Black Gate WKZ 100uF+100uF 500V
  93. sunn solarus guitar amp
  94. Converting Dynaco ST70 Power Transformer for 12.6V
  95. Simple CF with 5687/6900/E182CC
  96. World Audio Design 5881 Schematic needed
  97. PP triode transformer load
  98. 6V6 PP load line
  99. Need help to under stand this 6n3 Kit from ebay
  100. Help:ampeg svt 2 pro 100v>>240v
  101. Blown left channel
  102. Tube preamp build help-heaters
  103. Medium Power SET, EL156 based
  104. Concertina Splitter question - Need help
  105. 6V6 amp - schematic options
  106. Lectron pa50+jh50
  107. 4pr60b valve
  108. Transformer phase splitter
  109. Help! ground hum
  110. Question regarding Leak Stereo 20 and 6SN7 line stage preamp
  111. Recommended upgrades for Yaqin Tube Buffer ?
  112. 6J5 or 6S4 mic amp?
  113. ST-70 build, ideas and advice
  114. Yaqin MC-100B Help Needed!
  115. Preamp Aikido : 6ax5GT,12au7,2c51
  116. Heater of tube
  117. R-Core Winders
  118. 1946 philco amp, tuner, record player
  119. otions for drawing tube schematics on Mac..?
  120. Push/Pull Plate Load Choke - how to figure Inductance?
  121. 6aw8-a tube question
  122. Newbie needs a point in the right direction
  123. Minimalist PL519 OTL?
  124. Telefunken schematics
  125. parallel pp EL84
  126. AD1 Operating Question
  127. 6П3С-Е Russian NOS: Gas Problem
  128. Favourite EL34 circuit
  129. Medium power SET with parallel OP tubes
  130. sds labs into Pas3
  131. Low voltage 6922 preamp...wanting a schematic
  132. Voltage Gain on Long Tailed Drivers
  133. Purpose of 5842 tube?!?
  134. MA XDSE KT88 vs YAQIN MC-100B KT88
  135. JBL Amplifier story
  136. Fender tweed pro-amp clone
  137. Recommended spacing for multiple 5AR4's
  138. Cap choices coupling
  139. Output transformer for PP EL34 source
  140. mini max pre
  141. use 2 ohm speakers
  142. Ask tube rect 5u4c and JJ caps
  143. Adding caps to prevent oscilation in AF 5687
  144. Williamson on EL84. Is it worth doing?
  145. CCS and regulated B+
  146. Garter cross-coupled feedback
  147. soundcard protection Z ???
  148. Using a CCS on SE Output Stage
  149. First amp build... help please!
  150. multiple independent grid biasing from 1 mosfet
  151. Eico HF-81 modification opinion
  152. 4K or 5K Output Transformer
  153. Noisy input on Michaelson & Austin TVA-1
  154. Precision Electronics S-35 help,
  155. Rogers Cadet 3 Problem
  156. Triode Electronics VS Hammond
  157. TRIODE OPERATION USING THE SCREEN GRIDS AS THE CONTROL GRID - this work ?
  158. Start up delay needed???
  159. Connecting a stereo amp as a mono-block
  160. HQ-DHT (All tube DHT amli) 26-45-2A3
  161. 24A tube in triode mode, help !!!
  162. Amperite Ballast
  163. Need super quiet 6.3V filament supply schematic
  164. (Sound Space)Houston 2A3 Power Amplifier
  165. James Burgess 2A3 Monoblocks
  166. Funny tube tale from southamerica
  167. RCA 7189 Black Plates
  168. Preamp nasty noise and hum
  169. EDCOR VS One Electron
  170. Parallel output tubes/valves in push pull. Advantages/disadvantages?
  171. Robinhood output transformers?
  172. looking for help diagnosing volume loss on tube amplified reel to reel player
  173. Question about power consumption Hagerman Cornet Octal
  174. valve rectifier in PSUD
  175. Can you explain what this is ?
  176. volume rise with frequency problem
  177. 1 + 1 = 3 :)
  178. What would the perfect multi-way speaker for a tube amp look like?
  179. GU50 compared with EL84
  180. Counterpoint SA-4 manual and schematics
  181. Ever heard of a Valvo 16ECC ?
  182. the Reversal SRPP
  183. Want to build a C3G linestage
  184. 30A5 tubes
  185. Good speakers to match a K-12
  186. Driving Long Cables, how much current?
  187. twin triode question
  188. Am I going to blow up my 7189s
  189. How is wattage calculated when only using a single section?
  190. Counterpoint SA5 problems and a question.
  191. Headphone Amplifier 6922EH
  192. Fuse Clip for Small Plate Cap Use
  193. Advice sought on medium power triode for tube headphone amplifier
  194. Not the 111M; A Precise 116 Tube Tester
  195. Input stage
  196. Does anyone have any FFT plots from real Class-AB tube amps?
  197. Testing for a Damaged Output Trafo
  198. What has happened to WE Huntsville lately?
  199. Output Transformers Sun HCT 1003 KT
  200. Plexiglass case for small tubes?
  201. 100 Best Sound Tubes
  202. Input tube bias
  203. eschematic amplifier sinle end 12at7 6av6 6bq5
  204. Wiring - Audio Note Transformer Parallel Single-Ended 300B
  205. HV using zener diode
  206. Akai M8 rebuild up and running!
  207. Best current production 2a3
  208. what happens when plugging a stereo source into mono jack on a tube amp?
  209. Transformer coupled Gainclone idea.
  210. Audio Research VT100
  211. output transformer turns per volt
  212. valves and metal cones= bad mating?
  213. Why do you need a grid to ground resistor on a line stage?
  214. Need some help with RIAA Preamp
  215. Swapping transformer cores
  216. got hold of a bunch of tubes...
  217. output transformer secondary configuration
  218. WE/Ultrapath B+ Where?
  219. Blending 12ax7 parallel gain stages
  220. Sudden spark.
  221. Priboj Reborn
  222. Misunderstand of sijosae schematic
  223. 12AX7 Identification
  224. GM70 Datasheet Error!!
  225. Using old Hammond iron
  226. Need confirmation on LED bias for circuit
  227. Tone control problems
  228. Tube Parameter "Attenuation, Harmonic" What is it?
  229. Bias adjust on '65 Twin Reverb Reissue AB763 - 2004?
  230. Need HELP on Randall RGT100ES 6L6 to EL34
  231. Tube amp with Dual Triode
  232. Fisher X-101-C bias question
  233. DC Current-Regulated 300B filaments?
  234. Anyone ever use DC to heat rectifier tubes?
  235. Tantalum Resistor Watt?
  236. Help Choosing Power Supply Voltage Regulator Aikido Phono Amp
  237. Best sounding remote control volume
  238. plate and screen voltage
  239. 12AT7 plate voltage
  240. Latest LTspice giving crazy FFT results
  241. Dynakit PC-3A as a balance pre?
  242. e283cc better sounding than?
  243. Porchlight Scratchbuild
  244. No output and Loud squeals! Help!
  245. Low mu triode for phase splitter
  246. Help figuring which is the center tap???
  247. Help with Paco SA-40
  248. Best tube/sonics
  249. One Half 12AU7
  250. 1939 Novachord - 163 Tube Monster!!

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