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  1. The sensation of the 21st Century. Galvanic SUPER HIGH END PP power for all types of
  2. Audible Illusions and 6922
  3. quick access tube amp protection
  4. Identifying Genalex KT66 matched pair question
  5. Hunting 100Hz noise in SRPP+ stage
  6. JJ ECC83S Biasing conditions
  7. Audiophiletalk - Dirt Cheap SE
  8. 12AL8 Head-Amp with UTC Output Transformer
  9. SET monoblocks?
  10. EL84 Push Pull design from left over parts
  11. Strange UL Transformers
  12. Stabilization balanced currents in the PP stage.
  13. Current mirror stage in PP
  14. EL34 SE ultralinear schematic
  15. Question: Acceptable DC current in push-pull output transformer due to tube mismatch?
  16. Toroid Power Transformer For GM-70 845 211 1000V
  17. Building the "Crystal Palace" Amp
  18. Improved Sound Card Interface - Ideas and Suggestions?
  19. Upgrading OPTs in production amp? (Yaquin MC-10L)
  20. any good Triode 6H8C preamp schematics out there???
  21. pushpull 6aq5 distortion
  22. Mr. Lian 845 SET more kit rather than commercial product.
  23. Opinion for otl ocl headphone amp
  24. Tube-newby wanting to make a good tube amp
  25. Anyone used a voltage tripler PS?
  26. Audioromy 828A / FU-29 tube layout
  27. Choosing Cathode Bypass Capacitor
  28. Ground loop gremlins
  29. Crackling Amp after Accident
  30. New CCS/ depletion mode MOSFETs available... experience anyone?
  31. Mengyue Mini
  32. Parafeed quest
  33. Determining linearity - differential gain stage
  34. 6HB6 - Any pratical experience?
  35. 27 Tube Preamp design questions
  36. Output Transformers Mount Position
  37. Critique please: Fixed bias 7591 SE
  38. Coupling Cap Improvements?
  39. RL 12T 15
  40. Tube instead of anode resistor
  41. HELP!! Terrible 50Hz hum in Mullard 10W DIY amp
  42. My New 45 SET (choke-loaded 6SN7, direct-coupled)
  43. Hf31 fidelity valve type
  44. Design of transformers for valve amplifiers.Part2
  45. Harman Kardon ta5000X alignment/manual
  46. Help with an analog meter hack
  47. dirkwright phono
  48. Zener Voltage Regulator
  49. Fisher X-101-B Substitute for 7591
  50. UNU-pnono riaa mm preamp
  51. My old amps
  52. Switching regulator on Kickstarter
  53. my yaqin 100b will not bias on v1 v3
  54. Zenith model B835R
  55. Want to build 2a3 amp for old radio
  56. Preamp Advice
  57. simple 5687 pre amp help
  58. Pulling TV From 61 Maggie Imperial Console?
  59. I can buy some 6U9's cheap - are they any good, and what could I build?
  60. K8011/K8010 PCB build thread
  61. Choosing an op point when using a tube 'off label'
  62. Choke inputs
  63. Unbalanced In > Balanced Out line amp - How To Do It?
  64. 6146b output transformer. I'm new and I need help.
  65. Your first DiY Low Cost/Low Voltage tube AMP
  66. Need some advice on OPT for kt88/6l6
  67. 1:1:1 transformers
  68. Output transformer in the cathode?
  69. Popping DC
  70. Power transformer wiring issues
  71. easy question - Magnavox 86-01 owners...
  72. Mic preamp input transformer alternative?
  73. What's the Best Way to Reduce Gain in a Preamp
  74. safety with high voltage input capacitor ?
  75. SE EL84 amp - reducing 100Hz hum
  76. Photos of large DHT preamps? (Or large amps in general)
  77. Minimum pin length (noval)
  78. Biasing of KT120
  79. SE to balanced transformer
  80. Decoupling Cap value - How Much?
  81. Cathode bypass Cap vs. No Bypass Cap
  82. Interesting circuit I thought.
  83. Yet another K12G thread
  84. 6N3 tube preamp question
  85. Driver vs Power tube
  86. Help in Bias tube amp for Adis Devy 7
  87. Tubes and HT
  88. HiFiMan EF-2A schematic sought
  89. Please, help with a WE91 project on behalf of a friend
  90. Proposed Headphone Amp Overhaul?
  91. protection of downstream line amp
  92. Is the 6E6P suitable for audio?
  93. me clone proto EL/PL 504
  94. Improving headphone amplifier
  95. 5902 LSTPICE Model
  96. Canary CA-301 PSU
  97. 3B28 oscilator
  98. A lot of schematics
  99. V8 amp
  100. market by Jac music
  101. 6P3C-1 SE ? .
  102. Cary slp70: Worth to upgrade?
  103. Hickok 123B tube tester
  104. Adding NFB makes headphone amp sound AWFUL!!!
  105. Filaments hard wired to B+ on EZ81 base
  106. What the bird is OS 18/600?
  107. ccs 10m90s what is wrong?
  108. Topology for balanced preamp
  109. 6v6 vs. 6l6 vs. 807 soundwise..
  110. Opinions/Advice on Triode Strap method
  111. Something like a Miniwatt N3 or APPJ PA0901A
  112. Extraordinary harmonics. Type 47 # tube amp.
  113. Made a new tube amp, 6J5 +27 +45
  114. Anyone ever play around with a GU-72?
  115. Possibility of using a UTC LMI-500 transformer...
  116. Aikido transformer
  117. Can someone explain why you need to re-adjust the balance on a tube amp every time
  118. Which factory made these tubes ?
  119. 813 and gm70
  120. 13E1 Push Pull
  121. dump find.
  122. ...6SN7GT operating points tube help.......
  123. 6L6 6SJ7 Amp please pick faults if any
  124. Updated DIY EL34B 6SJ7 SE Amp
  125. 6C18 x 6C33
  126. Vintage tube amp find
  127. any benefit to screen-grid drive a 6V6?
  128. Brown face Scott LK72
  129. Pilot 1060 integrated - make it better!
  130. Should I ground my K12G or my Bugle 2?
  131. 6c33 amp convert to 6c41
  132. STA-LEVEL thumbs problem
  133. Amp motorboating at power up
  134. Spice models for AL4 and RS242 tubes
  135. Mains Switch
  136. Suggestions for big output stage needed
  137. Very Good (or best?) 12B4 schematic?
  138. Amplifier for active bookshelf speakers
  139. Olson AM-240 schematic needed
  140. Valve amp - maintenance
  141. Your opinion about Rotel 930AX to hyrbid mod
  142. Weston Tube Tester 774-5
  143. Tube circuit sim software for free?
  144. 6v6 family tubes
  145. Troublesome bias resistor, cathodyne stage
  146. 6AQ5 excellent for line stage?
  147. Datasheet 6P42s and 6P45C
  148. Quad / Cyrus impedance matching
  149. Zobel network at primary audio trafo?
  150. ECL86 question
  151. 500c buzzing power transformer
  152. LM4702+6L6GB/807
  153. TubeAudio Mixer Blog
  154. Finally started on my 6L6 amp. Need tube suggestions.
  155. Just another Scott thread
  156. Design for overdriven output stage
  157. Seeking Articals On Audio Transformer Design & Construction.
  158. Bias el34 pp
  159. Photo Gallery.
  160. Precision S35
  161. 6L6WGB
  162. 6BQ7A Driver
  163. Advise for Simpson 340 signal generator problem
  164. Armaco TTHF or Calrad AP 15 What to do What to do?...
  165. Screen Power and Warmup
  166. Wanting copies of Prof. Alexander Bereskin's transformer winding pictures.
  167. what's the brand of this capacitor sounds great ?
  168. Edcor CXSE25-8-3.2K or Transcendar TT-017-OT?
  169. PP 2A3 Fixed Bias
  170. RL12P35 convert to el34
  171. Statistical regulator from VA 4rd edition
  172. Matching Impedances (the Math behind it) Please Advise if you have a grasp. Xfmrs etc
  173. Help 6AQ5 pushpull
  174. HV Logic Control Approach
  175. Valve heater question
  176. Phase inverter adjustment - Fisher 80AZ
  177. Repurposing a Bogen CHB-35A
  178. SMPS
  179. Interstage and bias failure
  180. Grid 2 current for GU19-1
  181. 6x5 tube
  182. IT coupled 6BG6GA
  183. Mystery noise has got me baffled
  184. Dynaco PAS: too much liposuction?
  185. LP Tape Noise
  186. YAKOV ARONOV MA-100
  187. Help for balance-tone control-mode selector bypass
  188. Opinions please: seeking a first class DIY SET amp design
  189. PSU for 6N6P
  190. HOT B+ capacitors!
  191. Analog meter monitoring HT supply
  192. Lamm LL2.1 DC Offset problem
  193. 6L6GT/6SJ7 Valve Amp DIY
  194. BHExchange for BottleHead's
  195. 6BY5GA elevated heater question
  196. Tone controls
  197. EL84 "IP" questions
  198. KIT Single ended KT88
  199. HELP needed - LEAK Varislope 2 Stereo + Stereo 20 with pictures...
  200. All tube cap tube amp?
  201. 12AX7 preamp for DAC
  202. Grid resistors -> GND
  203. OTL headphone amp distorting & clipping: weak power supply?
  204. Broken bias resistors (Yaqin MC-10L)
  205. Tube Enclosure suggestion from Europe.
  206. Benefit/SQ of tube stage at the input of ss power amp
  207. Is 6907 and QQV03-20A tubes are same?
  208. Found some chokes
  209. 6SN7 at low plate currents
  210. 12AU7, 12BH7, Darker Less Bright Option
  211. Heater current effects
  212. Not using all the sections on multi-section cap
  213. DC heater supply dies on me
  214. 1972 Leak Varislope 2 Stereo
  215. OPT secondary ground, stacked supplies
  216. OTL for HeaPhone
  217. Voltage doubler and filament supply
  218. Please suggest me a 6V6 class AB amp
  219. Need Review of wiring up of this SRPP 6AS7 tube amp
  220. Hum in a triode 1H6G...help !
  221. 40w Class A PP KT66?
  222. My new small amp EL84 SE Triode
  223. tube preamp output impedance
  224. pete millet 807 amp
  225. Lost Negative Bias-Fixed Bias
  226. Aikido ('dead quiet') output impedance
  227. Looking for lineamp buffer schematics
  228. Nagra VPA 845
  229. How to match 6C45?
  230. Yet another question about cathode bias (led+pnp)
  231. Ideal System for 1960?
  232. What replaces an IN541 diode?
  233. Bottlehead Eros or Tube4Hifi PH16
  234. Psvane 2a3 T Mk II reliable vender
  235. Odd Wima cap markings
  236. Chinese Amp kit experience
  237. Considerations about headph. OCL
  238. Trying to solve a Plate Follower Problem
  239. Nichicon Caps
  240. Footprint Noval ECC83 Altium
  241. Interference in hybrid amp
  242. wiring DHT filaments with center tapped secondaries
  243. B+ of Curcio Daniel II
  244. Stepped Attenuators Questions
  245. Noisy Ground? (Probably not a loop)
  246. New Production Telefunken
  247. Tube horizontal mounting position
  248. "Ask Jan First" parts website in Germany
  249. EZ215 Stereo 5881 Amp Project
  250. CCS help dn2540 send 340v to the chassis

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