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  1. New GU50 SE: SRRP or Cascode for driver?
  2. Hivac XN11 tubes
  3. Conrad Johnson PV-10a hum. Any advice?
  4. Bob Carver's eye candy on eBay
  5. MFA Lumi started "motor-boating" today
  6. New GM70 tube with problem
  7. Interested in building together a 300B tube amp?
  8. cayin a-55t want to use el34
  9. Mc240
  10. Dht ?
  11. too much output impedance?
  12. College-proofing an ST-70 (aka autobias+ST-70)
  13. reverse polarity of the chinese goods?
  14. 6bg6 and 8k opt power amp project
  15. Need some calculation assist for a psu
  16. Baldwin Transformer Swap
  17. THD, s/n and IM noisy measurements
  18. Little dot 2+, got spark
  19. (INDIA) urgent - high-quality amp builders/techs in Delhi?
  20. What causes saturation in tubes?
  21. Plug and Play Power Supply
  22. GE 5814 and 12AUCIFTE
  23. Amplifier oscillates - advice sought
  24. 50s Amplifier
  25. power supply design question 832A amp
  26. Klimo power supply advice
  27. Earth Not Connected
  28. DC heater supply for phono pre
  29. Audio Note P2SE problem
  30. Aikido Transformers - Good Choice?
  31. Caps before or after MOSFET V-regulator
  32. Which capacitors should I replace?
  33. Testing Amplifiers
  34. Choosing choke valuein pre amp tube
  35. Supertriode with PNP transistors
  36. too much gain
  37. Lloyd's Vintage High Fidelity Audio Devices - both Tube and Solid State
  38. Cheap eBay "zoe_tsan" tube kits - worth anything?
  39. Bell Vintage High Fidelity Audio Devices - both Tube and Solid State
  40. Small Tube Amp with Hum
  41. tube rectifier question
  42. Unison Research S6 schematics
  43. vacuum tube amplifiers should be produced like this?
  44. 6d22s to 6cj3
  45. pot in tube preamp
  46. Mable Audio vs. Suppo audio sound quality
  47. swdfasdfsdf
  48. measuring heater voltage
  49. Need a circuit around these tubes.
  50. Single-Ended 13E1 amplifier
  51. Whats' the max allowable / reasonable ripple in SE amp?
  52. What amp kits are out there?
  53. ECC84/6N14P for audio
  54. PSU ignorant
  55. How to define a quality OT?
  56. Looking for some build advice
  57. SS CCS and distortion
  58. the valve with no markings
  59. Pentode AB1 design school???
  60. Capability of Sony/Tamradio SE Output Transformers
  61. my CELLINI triode amp
  62. 45-based SET -> Pass Labs F4
  63. Testing Amplifiers - Speaker or dummy load
  64. Quiet amp hums with signal source or input directly tied to star earth??
  65. amp output testing
  66. S5 Amp Comparison?
  67. How to Ground a Preamp PCB Board?
  68. RH807 / 6L6GC g2 issues
  69. 2010: Replacement for Black Gate WKZ 100uF+100uF 500V
  70. Converting Dynaco ST70 Power Transformer for 12.6V
  71. Simple CF with 5687/6900/E182CC
  72. World Audio Design 5881 Schematic needed
  73. PP triode transformer load
  74. 6V6 PP load line
  75. Need help to under stand this 6n3 Kit from ebay
  76. Blown left channel
  77. Tube preamp build help-heaters
  78. Medium Power SET, EL156 based
  79. Concertina Splitter question - Need help
  80. 6V6 amp - schematic options
  81. Lectron pa50+jh50
  82. 4pr60b valve
  83. Transformer phase splitter
  84. Help! ground hum
  85. Question regarding Leak Stereo 20 and 6SN7 line stage preamp
  86. Recommended upgrades for Yaqin Tube Buffer ?
  87. 6J5 or 6S4 mic amp?
  88. ST-70 build, ideas and advice
  89. Yaqin MC-100B Help Needed!
  90. Preamp Aikido : 6ax5GT,12au7,2c51
  91. Heater of tube
  92. R-Core Winders
  93. 1946 philco amp, tuner, record player
  94. otions for drawing tube schematics on Mac..?
  95. Push/Pull Plate Load Choke - how to figure Inductance?
  96. 6aw8-a tube question
  97. Newbie needs a point in the right direction
  98. Minimalist PL519 OTL?
  99. Telefunken schematics
  100. parallel pp EL84
  101. AD1 Operating Question
  102. 6П3С-Е Russian NOS: Gas Problem
  103. Favourite EL34 circuit
  104. Medium power SET with parallel OP tubes
  105. sds labs into Pas3
  106. Low voltage 6922 preamp...wanting a schematic
  107. Voltage Gain on Long Tailed Drivers
  108. Purpose of 5842 tube?!?
  109. MA XDSE KT88 vs YAQIN MC-100B KT88
  110. JBL Amplifier story
  111. Recommended spacing for multiple 5AR4's
  112. Cap choices coupling
  113. Output transformer for PP EL34 source
  114. mini max pre
  115. use 2 ohm speakers
  116. Ask tube rect 5u4c and JJ caps
  117. Adding caps to prevent oscilation in AF 5687
  118. Williamson on EL84. Is it worth doing?
  119. CCS and regulated B+
  120. Garter cross-coupled feedback
  121. soundcard protection Z ???
  122. Using a CCS on SE Output Stage
  123. First amp build... help please!
  124. multiple independent grid biasing from 1 mosfet
  125. Eico HF-81 modification opinion
  126. 4K or 5K Output Transformer
  127. Noisy input on Michaelson & Austin TVA-1
  128. Precision Electronics S-35 help,
  129. Rogers Cadet 3 Problem
  130. Triode Electronics VS Hammond
  131. Triode Operation Using The Screen Grids As The Control Grid - This Work?
  132. Start up delay needed???
  133. Connecting a stereo amp as a mono-block
  134. HQ-DHT (All tube DHT amli) 26-45-2A3
  135. 24A tube in triode mode, help !!!
  136. Need super quiet 6.3V filament supply schematic
  137. (Sound Space)Houston 2A3 Power Amplifier
  138. James Burgess 2A3 Monoblocks
  139. Funny tube tale from southamerica
  140. RCA 7189 Black Plates
  141. Preamp nasty noise and hum
  142. EDCOR VS One Electron
  143. Parallel output tubes/valves in push pull. Advantages/disadvantages?
  144. Robinhood output transformers?
  145. looking for help diagnosing volume loss on tube amplified reel to reel player
  146. Question about power consumption Hagerman Cornet Octal
  147. valve rectifier in PSUD
  148. Can you explain what this is ?
  149. volume rise with frequency problem
  150. 1 + 1 = 3 :)
  151. What would the perfect multi-way speaker for a tube amp look like?
  152. GU50 compared with EL84
  153. Counterpoint SA-4 manual and schematics
  154. Ever heard of a Valvo 16ECC ?
  155. the Reversal SRPP
  156. Want to build a C3G linestage
  157. 30A5 tubes
  158. Good speakers to match a K-12
  159. Driving Long Cables, how much current?
  160. twin triode question
  161. Am I going to blow up my 7189s
  162. How is wattage calculated when only using a single section?
  163. Counterpoint SA5 problems and a question.
  164. Headphone Amplifier 6922EH
  165. Fuse Clip for Small Plate Cap Use
  166. Advice sought on medium power triode for tube headphone amplifier
  167. Input stage
  168. Does anyone have any FFT plots from real Class-AB tube amps?
  169. Testing for a Damaged Output Trafo
  170. What has happened to WE Huntsville lately?
  171. Output Transformers Sun HCT 1003 KT
  172. Plexiglass case for small tubes?
  173. 100 Best Sound Tubes
  174. Input tube bias
  175. eschematic amplifier sinle end 12at7 6av6 6bq5
  176. Wiring - Audio Note Transformer Parallel Single-Ended 300B
  177. HV using zener diode
  178. Akai M8 rebuild up and running!
  179. Best current production 2a3
  180. what happens when plugging a stereo source into mono jack on a tube amp?
  181. Transformer coupled Gainclone idea.
  182. Audio Research VT100
  183. output transformer turns per volt
  184. valves and metal cones= bad mating?
  185. Why do you need a grid to ground resistor on a line stage?
  186. Need some help with RIAA Preamp
  187. Swapping transformer cores
  188. got hold of a bunch of tubes...
  189. output transformer secondary configuration
  190. WE/Ultrapath B+ Where?
  191. Blending 12ax7 parallel gain stages
  192. Sudden spark.
  193. Priboj Reborn
  194. Misunderstand of sijosae schematic
  195. 12AX7 Identification
  196. GM70 Datasheet Error!!
  197. Using old Hammond iron
  198. Need confirmation on LED bias for circuit
  199. Tube Parameter "Attenuation, Harmonic" What is it?
  200. Tube amp with Dual Triode
  201. Fisher X-101-C bias question
  202. DC Current-Regulated 300B filaments?
  203. Anyone ever use DC to heat rectifier tubes?
  204. Help Choosing Power Supply Voltage Regulator Aikido Phono Amp
  205. Best sounding remote control volume
  206. plate and screen voltage
  207. 12AT7 plate voltage
  208. Latest LTspice giving crazy FFT results
  209. Dynakit PC-3A as a balance pre?
  210. e283cc better sounding than?
  211. Porchlight Scratchbuild
  212. No output and Loud squeals! Help!
  213. Low mu triode for phase splitter
  214. Help figuring which is the center tap???
  215. Help with Paco SA-40
  216. Best tube/sonics
  217. One Half 12AU7
  218. Gyrators to replace PSU chokes?
  219. Output trannies for 6as7
  220. 2 Toroids = 1 Isolation Transformer?
  221. Sagging Heaters
  222. Kofi Annan in: "Kofi's Baby Huey"
  223. Point to point wiring help
  224. help !! PTT2s Line stage
  225. Rickard Berglund, Sweden
  226. clipping
  227. Wanted: a couple of UNF bolts
  228. H-Bridge Amp Design
  229. need help with yaqin mc10l
  230. Watt the?
  231. DIY tube preamp with 5687
  232. Help with tube stereo build
  233. Tube recommendation for speakers
  234. Eliminating volume pot?
  235. CXPP100-MS-3.3K or CXPP100-MS-4.2K
  236. tube power supply voltage
  237. Driver Bypass Cap - Value?
  238. Tube bases and plate caps rant
  239. tube dual regulated psu needs amp
  240. Help me choose output transformers
  241. Verdier dual regulated tube psu
  242. Aikido Phono Amp Output Tubes 12AU7 and 12AX7?
  243. Mullard EL84 ID
  244. schematic request for transformer with 4k primary and UL taps
  245. Plate-Grid feedback: How to get better than DHT performance from cheaper tubes
  246. More class D madness
  247. the SuperHybrid
  248. Tecon Model "55" final mods(?)
  249. Hammond P-T125E OPT
  250. Highbred Amp "TUMOS" Sounds good?

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