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  1. harmonic distortion
  2. Enhanced Tube's performance
  3. New GU50 SE: SRRP or Cascode for driver?
  4. Hivac XN11 tubes
  5. Conrad Johnson PV-10a hum. Any advice?
  6. Bob Carver's eye candy on eBay
  7. MFA Lumi started "motor-boating" today
  8. New GM70 tube with problem
  9. Interested in building together a 300B tube amp?
  10. cayin a-55t want to use el34
  11. Mc240
  12. Dht ?
  13. too much output impedance?
  14. College-proofing an ST-70 (aka autobias+ST-70)
  15. reverse polarity of the chinese goods?
  16. 6bg6 and 8k opt power amp project
  17. Need some calculation assist for a psu
  18. Baldwin Transformer Swap
  19. THD, s/n and IM noisy measurements
  20. Little dot 2+, got spark
  21. (INDIA) urgent - high-quality amp builders/techs in Delhi?
  22. What causes saturation in tubes?
  23. Plug and Play Power Supply
  24. GE 5814 and 12AUCIFTE
  25. Amplifier oscillates - advice sought
  26. 50s Amplifier
  27. power supply design question 832A amp
  28. Klimo power supply advice
  29. Earth Not Connected
  30. DC heater supply for phono pre
  31. Audio Note P2SE problem
  32. Aikido Transformers - Good Choice?
  33. Caps before or after MOSFET V-regulator
  34. Which capacitors should I replace?
  35. Testing Amplifiers
  36. Choosing choke valuein pre amp tube
  37. Supertriode with PNP transistors
  38. too much gain
  39. Lloyd's Vintage High Fidelity Audio Devices - both Tube and Solid State
  40. Cheap eBay "zoe_tsan" tube kits - worth anything?
  41. Bell Vintage High Fidelity Audio Devices - both Tube and Solid State
  42. Small Tube Amp with Hum
  43. tube rectifier question
  44. Unison Research S6 schematics
  45. vacuum tube amplifiers should be produced like this?
  46. 6d22s to 6cj3
  47. pot in tube preamp
  48. Mable Audio vs. Suppo audio sound quality
  49. swdfasdfsdf
  50. measuring heater voltage
  51. Need a circuit around these tubes.
  52. Single-Ended 13E1 amplifier
  53. Whats' the max allowable / reasonable ripple in SE amp?
  54. What amp kits are out there?
  55. ECC84/6N14P for audio
  56. PSU ignorant
  57. How to define a quality OT?
  58. Looking for some build advice
  59. SS CCS and distortion
  60. the valve with no markings
  61. Pentode AB1 design school???
  62. Capability of Sony/Tamradio SE Output Transformers
  63. my CELLINI triode amp
  64. 45-based SET -> Pass Labs F4
  65. Testing Amplifiers - Speaker or dummy load
  66. Quiet amp hums with signal source or input directly tied to star earth??
  67. amp output testing
  68. S5 Amp Comparison?
  69. How to Ground a Preamp PCB Board?
  70. RH807 / 6L6GC g2 issues
  71. 2010: Replacement for Black Gate WKZ 100uF+100uF 500V
  72. Converting Dynaco ST70 Power Transformer for 12.6V
  73. Simple CF with 5687/6900/E182CC
  74. World Audio Design 5881 Schematic needed
  75. PP triode transformer load
  76. 6V6 PP load line
  77. Need help to under stand this 6n3 Kit from ebay
  78. Blown left channel
  79. Tube preamp build help-heaters
  80. Medium Power SET, EL156 based
  81. Concertina Splitter question - Need help
  82. 6V6 amp - schematic options
  83. Lectron pa50+jh50
  84. 4pr60b valve
  85. Transformer phase splitter
  86. Help! ground hum
  87. Question regarding Leak Stereo 20 and 6SN7 line stage preamp
  88. Recommended upgrades for Yaqin Tube Buffer ?
  89. 6J5 or 6S4 mic amp?
  90. ST-70 build, ideas and advice
  91. Yaqin MC-100B Help Needed!
  92. Preamp Aikido : 6ax5GT,12au7,2c51
  93. Heater of tube
  94. R-Core Winders
  95. 1946 philco amp, tuner, record player
  96. otions for drawing tube schematics on Mac..?
  97. Push/Pull Plate Load Choke - how to figure Inductance?
  98. 6aw8-a tube question
  99. Newbie needs a point in the right direction
  100. Minimalist PL519 OTL?
  101. Telefunken schematics
  102. parallel pp EL84
  103. AD1 Operating Question
  104. 6П3С-Е Russian NOS: Gas Problem
  105. Favourite EL34 circuit
  106. Medium power SET with parallel OP tubes
  107. sds labs into Pas3
  108. Low voltage 6922 preamp...wanting a schematic
  109. Voltage Gain on Long Tailed Drivers
  110. Purpose of 5842 tube?!?
  111. MA XDSE KT88 vs YAQIN MC-100B KT88
  112. JBL Amplifier story
  113. Recommended spacing for multiple 5AR4's
  114. Cap choices coupling
  115. Output transformer for PP EL34 source
  116. mini max pre
  117. use 2 ohm speakers
  118. Ask tube rect 5u4c and JJ caps
  119. Adding caps to prevent oscilation in AF 5687
  120. Williamson on EL84. Is it worth doing?
  121. CCS and regulated B+
  122. Garter cross-coupled feedback
  123. soundcard protection Z ???
  124. Using a CCS on SE Output Stage
  125. First amp build... help please!
  126. multiple independent grid biasing from 1 mosfet
  127. Eico HF-81 modification opinion
  128. 4K or 5K Output Transformer
  129. Noisy input on Michaelson & Austin TVA-1
  130. Precision Electronics S-35 help,
  131. Rogers Cadet 3 Problem
  132. Triode Electronics VS Hammond
  133. Triode Operation Using The Screen Grids As The Control Grid - This Work?
  134. Start up delay needed???
  135. Connecting a stereo amp as a mono-block
  136. HQ-DHT (All tube DHT amli) 26-45-2A3
  137. 24A tube in triode mode, help !!!
  138. Need super quiet 6.3V filament supply schematic
  139. (Sound Space)Houston 2A3 Power Amplifier
  140. James Burgess 2A3 Monoblocks
  141. Funny tube tale from southamerica
  142. RCA 7189 Black Plates
  143. Preamp nasty noise and hum
  144. EDCOR VS One Electron
  145. Parallel output tubes/valves in push pull. Advantages/disadvantages?
  146. Robinhood output transformers?
  147. looking for help diagnosing volume loss on tube amplified reel to reel player
  148. Question about power consumption Hagerman Cornet Octal
  149. valve rectifier in PSUD
  150. Can you explain what this is ?
  151. volume rise with frequency problem
  152. 1 + 1 = 3 :)
  153. What would the perfect multi-way speaker for a tube amp look like?
  154. GU50 compared with EL84
  155. Counterpoint SA-4 manual and schematics
  156. Ever heard of a Valvo 16ECC ?
  157. the Reversal SRPP
  158. Want to build a C3G linestage
  159. 30A5 tubes
  160. Good speakers to match a K-12
  161. Driving Long Cables, how much current?
  162. twin triode question
  163. Am I going to blow up my 7189s
  164. How is wattage calculated when only using a single section?
  165. Counterpoint SA5 problems and a question.
  166. Headphone Amplifier 6922EH
  167. Fuse Clip for Small Plate Cap Use
  168. Advice sought on medium power triode for tube headphone amplifier
  169. Input stage
  170. Does anyone have any FFT plots from real Class-AB tube amps?
  171. Testing for a Damaged Output Trafo
  172. What has happened to WE Huntsville lately?
  173. Output Transformers Sun HCT 1003 KT
  174. Plexiglass case for small tubes?
  175. 100 Best Sound Tubes
  176. Input tube bias
  177. eschematic amplifier sinle end 12at7 6av6 6bq5
  178. Wiring - Audio Note Transformer Parallel Single-Ended 300B
  179. HV using zener diode
  180. Akai M8 rebuild up and running!
  181. Best current production 2a3
  182. what happens when plugging a stereo source into mono jack on a tube amp?
  183. Transformer coupled Gainclone idea.
  184. Audio Research VT100
  185. output transformer turns per volt
  186. valves and metal cones= bad mating?
  187. Why do you need a grid to ground resistor on a line stage?
  188. Need some help with RIAA Preamp
  189. Swapping transformer cores
  190. got hold of a bunch of tubes...
  191. output transformer secondary configuration
  192. WE/Ultrapath B+ Where?
  193. Blending 12ax7 parallel gain stages
  194. Sudden spark.
  195. Priboj Reborn
  196. Misunderstand of sijosae schematic
  197. 12AX7 Identification
  198. GM70 Datasheet Error!!
  199. Using old Hammond iron
  200. Need confirmation on LED bias for circuit
  201. Tube Parameter "Attenuation, Harmonic" What is it?
  202. Tube amp with Dual Triode
  203. Fisher X-101-C bias question
  204. DC Current-Regulated 300B filaments?
  205. Anyone ever use DC to heat rectifier tubes?
  206. Help Choosing Power Supply Voltage Regulator Aikido Phono Amp
  207. Best sounding remote control volume
  208. plate and screen voltage
  209. 12AT7 plate voltage
  210. Latest LTspice giving crazy FFT results
  211. Dynakit PC-3A as a balance pre?
  212. e283cc better sounding than?
  213. Porchlight Scratchbuild
  214. No output and Loud squeals! Help!
  215. Low mu triode for phase splitter
  216. Help figuring which is the center tap???
  217. Help with Paco SA-40
  218. Best tube/sonics
  219. One Half 12AU7
  220. Gyrators to replace PSU chokes?
  221. Output trannies for 6as7
  222. 2 Toroids = 1 Isolation Transformer?
  223. Sagging Heaters
  224. Kofi Annan in: "Kofi's Baby Huey"
  225. Point to point wiring help
  226. help !! PTT2s Line stage
  227. Rickard Berglund, Sweden
  228. clipping
  229. Wanted: a couple of UNF bolts
  230. H-Bridge Amp Design
  231. need help with yaqin mc10l
  232. Watt the?
  233. DIY tube preamp with 5687
  234. Help with tube stereo build
  235. Tube recommendation for speakers
  236. Eliminating volume pot?
  237. CXPP100-MS-3.3K or CXPP100-MS-4.2K
  238. tube power supply voltage
  239. Driver Bypass Cap - Value?
  240. Tube bases and plate caps rant
  241. tube dual regulated psu needs amp
  242. Help me choose output transformers
  243. Verdier dual regulated tube psu
  244. Aikido Phono Amp Output Tubes 12AU7 and 12AX7?
  245. Mullard EL84 ID
  246. schematic request for transformer with 4k primary and UL taps
  247. Plate-Grid feedback: How to get better than DHT performance from cheaper tubes
  248. More class D madness
  249. the SuperHybrid
  250. Tecon Model "55" final mods(?)

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