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  1. too much output impedance?
  2. College-proofing an ST-70 (aka autobias+ST-70)
  3. reverse polarity of the chinese goods?
  4. 6bg6 and 8k opt power amp project
  5. Need some calculation assist for a psu
  6. Baldwin Transformer Swap
  7. THD, s/n and IM noisy measurements
  8. Little dot 2+, got spark
  9. (INDIA) urgent - high-quality amp builders/techs in Delhi?
  10. What causes saturation in tubes?
  11. Plug and Play Power Supply
  12. GE 5814 and 12AUCIFTE
  13. Amplifier oscillates - advice sought
  14. 50s Amplifier
  15. power supply design question 832A amp
  16. Klimo power supply advice
  17. Earth Not Connected
  18. DC heater supply for phono pre
  19. Audio Note P2SE problem
  20. Aikido Transformers - Good Choice?
  21. Caps before or after MOSFET V-regulator
  22. Which capacitors should I replace?
  23. Testing Amplifiers
  24. Choosing choke valuein pre amp tube
  25. Supertriode with PNP transistors
  26. too much gain
  27. Lloyd's Vintage High Fidelity Audio Devices - both Tube and Solid State
  28. Cheap eBay "zoe_tsan" tube kits - worth anything?
  29. Bell Vintage High Fidelity Audio Devices - both Tube and Solid State
  30. Small Tube Amp with Hum
  31. tube rectifier question
  32. Unison Research S6 schematics
  33. vacuum tube amplifiers should be produced like this?
  34. 6d22s to 6cj3
  35. pot in tube preamp
  36. Mable Audio vs. Suppo audio sound quality
  37. swdfasdfsdf
  38. measuring heater voltage
  39. Need a circuit around these tubes.
  40. Single-Ended 13E1 amplifier
  41. Whats' the max allowable / reasonable ripple in SE amp?
  42. What amp kits are out there?
  43. ECC84/6N14P for audio
  44. PSU ignorant
  45. How to define a quality OT?
  46. Looking for some build advice
  47. SS CCS and distortion
  48. the valve with no markings
  49. Pentode AB1 design school???
  50. Capability of Sony/Tamradio SE Output Transformers
  51. my CELLINI triode amp
  52. 45-based SET -> Pass Labs F4
  53. Testing Amplifiers - Speaker or dummy load
  54. Quiet amp hums with signal source or input directly tied to star earth??
  55. amp output testing
  56. S5 Amp Comparison?
  57. How to Ground a Preamp PCB Board?
  58. RH807 / 6L6GC g2 issues
  59. 2010: Replacement for Black Gate WKZ 100uF+100uF 500V
  60. Converting Dynaco ST70 Power Transformer for 12.6V
  61. Simple CF with 5687/6900/E182CC
  62. World Audio Design 5881 Schematic needed
  63. PP triode transformer load
  64. 6V6 PP load line
  65. Need help to under stand this 6n3 Kit from ebay
  66. Blown left channel
  67. Tube preamp build help-heaters
  68. Medium Power SET, EL156 based
  69. Concertina Splitter question - Need help
  70. 6V6 amp - schematic options
  71. Lectron pa50+jh50
  72. 4pr60b valve
  73. Transformer phase splitter
  74. Help! ground hum
  75. Question regarding Leak Stereo 20 and 6SN7 line stage preamp
  76. Recommended upgrades for Yaqin Tube Buffer ?
  77. 6J5 or 6S4 mic amp?
  78. ST-70 build, ideas and advice
  79. Yaqin MC-100B Help Needed!
  80. Preamp Aikido : 6ax5GT,12au7,2c51
  81. Heater of tube
  82. R-Core Winders
  83. 1946 philco amp, tuner, record player
  84. otions for drawing tube schematics on Mac..?
  85. Push/Pull Plate Load Choke - how to figure Inductance?
  86. 6aw8-a tube question
  87. Newbie needs a point in the right direction
  88. Minimalist PL519 OTL?
  89. Telefunken schematics
  90. parallel pp EL84
  91. AD1 Operating Question
  92. 6П3С-Е Russian NOS: Gas Problem
  93. Favourite EL34 circuit
  94. Medium power SET with parallel OP tubes
  95. sds labs into Pas3
  96. Low voltage 6922 preamp...wanting a schematic
  97. Voltage Gain on Long Tailed Drivers
  98. Purpose of 5842 tube?!?
  99. MA XDSE KT88 vs YAQIN MC-100B KT88
  100. JBL Amplifier story
  101. Recommended spacing for multiple 5AR4's
  102. Cap choices coupling
  103. Output transformer for PP EL34 source
  104. mini max pre
  105. use 2 ohm speakers
  106. Ask tube rect 5u4c and JJ caps
  107. Adding caps to prevent oscilation in AF 5687
  108. Williamson on EL84. Is it worth doing?
  109. CCS and regulated B+
  110. Garter cross-coupled feedback
  111. soundcard protection Z ???
  112. Using a CCS on SE Output Stage
  113. First amp build... help please!
  114. multiple independent grid biasing from 1 mosfet
  115. Eico HF-81 modification opinion
  116. 4K or 5K Output Transformer
  117. Noisy input on Michaelson & Austin TVA-1
  118. Precision Electronics S-35 help,
  119. Rogers Cadet 3 Problem
  120. Triode Electronics VS Hammond
  121. TRIODE OPERATION USING THE SCREEN GRIDS AS THE CONTROL GRID - this work ?
  122. Start up delay needed???
  123. Connecting a stereo amp as a mono-block
  124. HQ-DHT (All tube DHT amli) 26-45-2A3
  125. 24A tube in triode mode, help !!!
  126. Amperite Ballast
  127. Need super quiet 6.3V filament supply schematic
  128. (Sound Space)Houston 2A3 Power Amplifier
  129. James Burgess 2A3 Monoblocks
  130. Funny tube tale from southamerica
  131. RCA 7189 Black Plates
  132. Preamp nasty noise and hum
  133. EDCOR VS One Electron
  134. Parallel output tubes/valves in push pull. Advantages/disadvantages?
  135. Robinhood output transformers?
  136. looking for help diagnosing volume loss on tube amplified reel to reel player
  137. Question about power consumption Hagerman Cornet Octal
  138. valve rectifier in PSUD
  139. Can you explain what this is ?
  140. volume rise with frequency problem
  141. 1 + 1 = 3 :)
  142. What would the perfect multi-way speaker for a tube amp look like?
  143. GU50 compared with EL84
  144. Counterpoint SA-4 manual and schematics
  145. Ever heard of a Valvo 16ECC ?
  146. the Reversal SRPP
  147. Want to build a C3G linestage
  148. 30A5 tubes
  149. Good speakers to match a K-12
  150. Driving Long Cables, how much current?
  151. twin triode question
  152. Am I going to blow up my 7189s
  153. How is wattage calculated when only using a single section?
  154. Counterpoint SA5 problems and a question.
  155. Headphone Amplifier 6922EH
  156. Fuse Clip for Small Plate Cap Use
  157. Advice sought on medium power triode for tube headphone amplifier
  158. Not the 111M; A Precise 116 Tube Tester
  159. Input stage
  160. Does anyone have any FFT plots from real Class-AB tube amps?
  161. Testing for a Damaged Output Trafo
  162. What has happened to WE Huntsville lately?
  163. Output Transformers Sun HCT 1003 KT
  164. Plexiglass case for small tubes?
  165. 100 Best Sound Tubes
  166. Input tube bias
  167. eschematic amplifier sinle end 12at7 6av6 6bq5
  168. Wiring - Audio Note Transformer Parallel Single-Ended 300B
  169. HV using zener diode
  170. Akai M8 rebuild up and running!
  171. Best current production 2a3
  172. what happens when plugging a stereo source into mono jack on a tube amp?
  173. Transformer coupled Gainclone idea.
  174. Audio Research VT100
  175. output transformer turns per volt
  176. valves and metal cones= bad mating?
  177. Why do you need a grid to ground resistor on a line stage?
  178. Need some help with RIAA Preamp
  179. Swapping transformer cores
  180. got hold of a bunch of tubes...
  181. output transformer secondary configuration
  182. WE/Ultrapath B+ Where?
  183. Blending 12ax7 parallel gain stages
  184. Sudden spark.
  185. Priboj Reborn
  186. Misunderstand of sijosae schematic
  187. 12AX7 Identification
  188. GM70 Datasheet Error!!
  189. Using old Hammond iron
  190. Need confirmation on LED bias for circuit
  191. Tube Parameter "Attenuation, Harmonic" What is it?
  192. Tube amp with Dual Triode
  193. Fisher X-101-C bias question
  194. DC Current-Regulated 300B filaments?
  195. Anyone ever use DC to heat rectifier tubes?
  196. Help Choosing Power Supply Voltage Regulator Aikido Phono Amp
  197. Best sounding remote control volume
  198. plate and screen voltage
  199. 12AT7 plate voltage
  200. Latest LTspice giving crazy FFT results
  201. Dynakit PC-3A as a balance pre?
  202. e283cc better sounding than?
  203. Porchlight Scratchbuild
  204. No output and Loud squeals! Help!
  205. Low mu triode for phase splitter
  206. Help figuring which is the center tap???
  207. Help with Paco SA-40
  208. Best tube/sonics
  209. One Half 12AU7
  210. Gyrators to replace PSU chokes?
  211. Output trannies for 6as7
  212. 2 Toroids = 1 Isolation Transformer?
  213. Finding Transformer Building Supplies
  214. Sagging Heaters
  215. Kofi Annan in: "Kofi's Baby Huey"
  216. Point to point wiring help
  217. help !! PTT2s Line stage
  218. Rickard Berglund, Sweden
  219. "The Sussex Homebrew Valve Tester"
  220. clipping
  221. Wanted: a couple of UNF bolts
  222. H-Bridge Amp Design
  223. need help with yaqin mc10l
  224. Watt the?
  225. DIY tube preamp with 5687
  226. Help with tube stereo build
  227. Tube recommendation for speakers
  228. Eliminating volume pot?
  229. CXPP100-MS-3.3K or CXPP100-MS-4.2K
  230. tube power supply voltage
  231. Driver Bypass Cap - Value?
  232. Tube bases and plate caps rant
  233. tube dual regulated psu needs amp
  234. Help me choose output transformers
  235. Verdier dual regulated tube psu
  236. Aikido Phono Amp Output Tubes 12AU7 and 12AX7?
  237. Mullard EL84 ID
  238. schematic request for transformer with 4k primary and UL taps
  239. Plate-Grid feedback: How to get better than DHT performance from cheaper tubes
  240. More class D madness
  241. the SuperHybrid
  242. Tecon Model "55" final mods(?)
  243. Hammond P-T125E OPT
  244. Highbred Amp "TUMOS" Sounds good?
  245. 300B SET which chassis design
  246. Help with creating a simple tube HV regulated supply
  247. Tube Sockets for oddball miniatures
  248. Bogen chb35a
  249. My last el84 PP tube amplifier
  250. Ultrapath - Advantages?

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