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  1. Earth Not Connected
  2. DC heater supply for phono pre
  3. Audio Note P2SE problem
  4. Aikido Transformers - Good Choice?
  5. Caps before or after MOSFET V-regulator
  6. Which capacitors should I replace?
  7. Testing Amplifiers
  8. Choosing choke valuein pre amp tube
  9. Supertriode with PNP transistors
  10. too much gain
  11. Lloyd's Vintage High Fidelity Audio Devices - both Tube and Solid State
  12. Cheap eBay "zoe_tsan" tube kits - worth anything?
  13. Bell Vintage High Fidelity Audio Devices - both Tube and Solid State
  14. Small Tube Amp with Hum
  15. tube rectifier question
  16. Unison Research S6 schematics
  17. vacuum tube amplifiers should be produced like this?
  18. 6d22s to 6cj3
  19. pot in tube preamp
  20. Mable Audio vs. Suppo audio sound quality
  21. swdfasdfsdf
  22. measuring heater voltage
  23. Need a circuit around these tubes.
  24. Single-Ended 13E1 amplifier
  25. Whats' the max allowable / reasonable ripple in SE amp?
  26. What amp kits are out there?
  27. ECC84/6N14P for audio
  28. PSU ignorant
  29. How to define a quality OT?
  30. Looking for some build advice
  31. ASC oil caps vs M-tube cap for ps
  32. SS CCS and distortion
  33. the valve with no markings
  34. Pentode AB1 design school???
  35. Capability of Sony/Tamradio SE Output Transformers
  36. my CELLINI triode amp
  37. 45-based SET -> Pass Labs F4
  38. Testing Amplifiers - Speaker or dummy load
  39. Quiet amp hums with signal source or input directly tied to star earth??
  40. amp output testing
  41. S5 Amp Comparison?
  42. How to Ground a Preamp PCB Board?
  43. RH807 / 6L6GC g2 issues
  44. 2010: Replacement for Black Gate WKZ 100uF+100uF 500V
  45. sunn solarus guitar amp
  46. Converting Dynaco ST70 Power Transformer for 12.6V
  47. Simple CF with 5687/6900/E182CC
  48. World Audio Design 5881 Schematic needed
  49. PP triode transformer load
  50. 6V6 PP load line
  51. Need help to under stand this 6n3 Kit from ebay
  52. Help:ampeg svt 2 pro 100v>>240v
  53. Blown left channel
  54. Tube preamp build help-heaters
  55. Medium Power SET, EL156 based
  56. Concertina Splitter question - Need help
  57. 6V6 amp - schematic options
  58. Lectron pa50+jh50
  59. 4pr60b valve
  60. Transformer phase splitter
  61. Help! ground hum
  62. Question regarding Leak Stereo 20 and 6SN7 line stage preamp
  63. Recommended upgrades for Yaqin Tube Buffer ?
  64. 6J5 or 6S4 mic amp?
  65. ST-70 build, ideas and advice
  66. Yaqin MC-100B Help Needed!
  67. Preamp Aikido : 6ax5GT,12au7,2c51
  68. Heater of tube
  69. R-Core Winders
  70. 1946 philco amp, tuner, record player
  71. otions for drawing tube schematics on Mac..?
  72. Push/Pull Plate Load Choke - how to figure Inductance?
  73. 6aw8-a tube question
  74. Newbie needs a point in the right direction
  75. Minimalist PL519 OTL?
  76. Telefunken schematics
  77. parallel pp EL84
  78. AD1 Operating Question
  79. 6П3С-Е Russian NOS: Gas Problem
  80. Favourite EL34 circuit
  81. Medium power SET with parallel OP tubes
  82. sds labs into Pas3
  83. Low voltage 6922 preamp...wanting a schematic
  84. Voltage Gain on Long Tailed Drivers
  85. Purpose of 5842 tube?!?
  86. MA XDSE KT88 vs YAQIN MC-100B KT88
  87. JBL Amplifier story
  88. Fender tweed pro-amp clone
  89. Recommended spacing for multiple 5AR4's
  90. Cap choices coupling
  91. Output transformer for PP EL34 source
  92. mini max pre
  93. use 2 ohm speakers
  94. Ask tube rect 5u4c and JJ caps
  95. Adding caps to prevent oscilation in AF 5687
  96. Williamson on EL84. Is it worth doing?
  97. CCS and regulated B+
  98. Garter cross-coupled feedback
  99. soundcard protection Z ???
  100. Using a CCS on SE Output Stage
  101. First amp build... help please!
  102. multiple independent grid biasing from 1 mosfet
  103. Eico HF-81 modification opinion
  104. 4K or 5K Output Transformer
  105. Noisy input on Michaelson & Austin TVA-1
  106. Precision Electronics S-35 help,
  107. Rogers Cadet 3 Problem
  108. Triode Electronics VS Hammond
  109. TRIODE OPERATION USING THE SCREEN GRIDS AS THE CONTROL GRID - this work ?
  110. Start up delay needed???
  111. Connecting a stereo amp as a mono-block
  112. HQ-DHT (All tube DHT amli) 26-45-2A3
  113. 24A tube in triode mode, help !!!
  114. Amperite Ballast
  115. Need super quiet 6.3V filament supply schematic
  116. (Sound Space)Houston 2A3 Power Amplifier
  117. James Burgess 2A3 Monoblocks
  118. Funny tube tale from southamerica
  119. RCA 7189 Black Plates
  120. Preamp nasty noise and hum
  121. EDCOR VS One Electron
  122. Parallel output tubes/valves in push pull. Advantages/disadvantages?
  123. Robinhood output transformers?
  124. looking for help diagnosing volume loss on tube amplified reel to reel player
  125. Question about power consumption Hagerman Cornet Octal
  126. valve rectifier in PSUD
  127. Can you explain what this is ?
  128. volume rise with frequency problem
  129. 1 + 1 = 3 :)
  130. What would the perfect multi-way speaker for a tube amp look like?
  131. GU50 compared with EL84
  132. Counterpoint SA-4 manual and schematics
  133. Ever heard of a Valvo 16ECC ?
  134. the Reversal SRPP
  135. Want to build a C3G linestage
  136. 30A5 tubes
  137. Good speakers to match a K-12
  138. Driving Long Cables, how much current?
  139. twin triode question
  140. Am I going to blow up my 7189s
  141. How is wattage calculated when only using a single section?
  142. Counterpoint SA5 problems and a question.
  143. Headphone Amplifier 6922EH
  144. Fuse Clip for Small Plate Cap Use
  145. Advice sought on medium power triode for tube headphone amplifier
  146. Not the 111M; A Precise 116 Tube Tester
  147. Input stage
  148. Does anyone have any FFT plots from real Class-AB tube amps?
  149. Testing for a Damaged Output Trafo
  150. What has happened to WE Huntsville lately?
  151. Output Transformers Sun HCT 1003 KT
  152. Plexiglass case for small tubes?
  153. 100 Best Sound Tubes
  154. Input tube bias
  155. eschematic amplifier sinle end 12at7 6av6 6bq5
  156. Wiring - Audio Note Transformer Parallel Single-Ended 300B
  157. HV using zener diode
  158. Akai M8 rebuild up and running!
  159. Best current production 2a3
  160. what happens when plugging a stereo source into mono jack on a tube amp?
  161. Transformer coupled Gainclone idea.
  162. Audio Research VT100
  163. output transformer turns per volt
  164. valves and metal cones= bad mating?
  165. Why do you need a grid to ground resistor on a line stage?
  166. Need some help with RIAA Preamp
  167. Swapping transformer cores
  168. got hold of a bunch of tubes...
  169. output transformer secondary configuration
  170. WE/Ultrapath B+ Where?
  171. Blending 12ax7 parallel gain stages
  172. Sudden spark.
  173. Priboj Reborn
  174. Misunderstand of sijosae schematic
  175. 12AX7 Identification
  176. GM70 Datasheet Error!!
  177. Using old Hammond iron
  178. Need confirmation on LED bias for circuit
  179. Tone control problems
  180. Tube Parameter "Attenuation, Harmonic" What is it?
  181. Bias adjust on '65 Twin Reverb Reissue AB763 - 2004?
  182. Need HELP on Randall RGT100ES 6L6 to EL34
  183. Tube amp with Dual Triode
  184. Fisher X-101-C bias question
  185. DC Current-Regulated 300B filaments?
  186. Anyone ever use DC to heat rectifier tubes?
  187. Tantalum Resistor Watt?
  188. Help Choosing Power Supply Voltage Regulator Aikido Phono Amp
  189. Best sounding remote control volume
  190. plate and screen voltage
  191. 12AT7 plate voltage
  192. Latest LTspice giving crazy FFT results
  193. Dynakit PC-3A as a balance pre?
  194. e283cc better sounding than?
  195. Porchlight Scratchbuild
  196. No output and Loud squeals! Help!
  197. Low mu triode for phase splitter
  198. Help figuring which is the center tap???
  199. Help with Paco SA-40
  200. Best tube/sonics
  201. One Half 12AU7
  202. 1939 Novachord - 163 Tube Monster!!
  203. Gyrators to replace PSU chokes?
  204. Output trannies for 6as7
  205. 2 Toroids = 1 Isolation Transformer?
  206. Finding Transformer Building Supplies
  207. Sagging Heaters
  208. Kofi Annan in: "Kofi's Baby Huey"
  209. Point to point wiring help
  210. help !! PTT2s Line stage
  211. Rickard Berglund, Sweden
  212. "The Sussex Homebrew Valve Tester"
  213. clipping
  214. Wanted: a couple of UNF bolts
  215. H-Bridge Amp Design
  216. need help with yaqin mc10l
  217. Watt the?
  218. DIY tube preamp with 5687
  219. Help with tube stereo build
  220. Tube recommendation for speakers
  221. Bogen mx60a Schematic
  222. Eliminating volume pot?
  223. CXPP100-MS-3.3K or CXPP100-MS-4.2K
  224. tube power supply voltage
  225. Driver Bypass Cap - Value?
  226. Tube bases and plate caps rant
  227. tube dual regulated psu needs amp
  228. Help me choose output transformers
  229. 12GT5-guitar amp.
  230. Verdier dual regulated tube psu
  231. Aikido Phono Amp Output Tubes 12AU7 and 12AX7?
  232. Mullard EL84 ID
  233. schematic request for transformer with 4k primary and UL taps
  234. Plate-Grid feedback: How to get better than DHT performance from cheaper tubes
  235. Anyone going to the Dayton Hamfest?
  236. More class D madness
  237. the SuperHybrid
  238. Tecon Model "55" final mods(?)
  239. Hammond P-T125E OPT
  240. Highbred Amp "TUMOS" Sounds good?
  241. 300B SET which chassis design
  242. Help with creating a simple tube HV regulated supply
  243. Tube Sockets for oddball miniatures
  244. McGohan M506 PA Guitar conversion mods.
  245. Bogen chb35a
  246. My last el84 PP tube amplifier
  247. Ultrapath - Advantages?
  248. Phono preamp with c/em2
  249. 12AY7 plate current
  250. OPT identification

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