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  1. 6BM8 in STC mode
  2. My Moscode again: What is the bias current?
  3. OTL WCF headphone amp build + awesome prototype material
  4. Type 42 single ended ideas
  5. Help with my Moscode 300 amp
  6. Thoughts on this volume potentiometer?
  7. Optimum load impedance for PCL85?
  8. Croatian triode Festival 2014.
  9. Old ekco tv transformers
  10. vacuum tube score.. what to do with
  11. Valve based disco mixer.
  12. Webcor ceramic phono input circuitry suggestions?
  13. Position of OPT windings
  14. sd2 seven pin??
  15. Help design a Small 250VDC PSU for tube preamp
  16. Bright Driver Tubes 12AU7, 12BH7, 5814...
  17. Question about using tube socket center hole for star ground
  18. Heathkit UA-2 clone project
  19. Schematic CAD Program
  20. Latest on the RH amps..
  21. Transformer design program
  22. 807 "Musicians Amplifier" help
  23. J.E. LABS PP2A3 POWER SUPPLY ?
  24. Mono Block Building Project
  25. EL34 CCS ideas
  26. Magnavox 8601-20
  27. wood/metal vs all-metal chassis
  28. Design data on dry battery tubes
  29. Differential tube with a gain stage 1178
  30. 6C4C tube ...Good to buy ?
  31. Including a C- winding on a filament transformer
  32. CINEMAG 15B TRANSFORMERS balanced>unbalanced
  33. Rebuilt Heathkit AA32 with hum on MAG PHONO input
  34. Electrolytic cap question
  35. Tube Socket ID
  36. JJ 5Y3S is too tall...need smaller tube
  37. Uniamp 2A3
  38. buzz noise from paraphase circuit
  39. Benefits of Enhanced Triode Connection
  40. Working out a valves load resistance?
  41. 813 Alternatives
  42. Help 6N6T pinout
  43. Very large parafeed cap
  44. Bright purple flash 6N1P
  45. Harman Kardon Citation II - rebuild questions
  46. Stoetkit junior mk2
  47. 1619 Push pull output stage
  48. Tube getter
  49. The sensation of the 21st Century. Galvanic SUPER HIGH END PP power for all types of
  50. Audible Illusions and 6922
  51. quick access tube amp protection
  52. Identifying Genalex KT66 matched pair question
  53. Hunting 100Hz noise in SRPP+ stage
  54. JJ ECC83S Biasing conditions
  55. Audiophiletalk - Dirt Cheap SE
  56. 12AL8 Head-Amp with UTC Output Transformer
  57. SET monoblocks?
  58. EL84 Push Pull design from left over parts
  59. Strange UL Transformers
  60. Stabilization balanced currents in the PP stage.
  61. Current mirror stage in PP
  62. EL34 SE ultralinear schematic
  63. Question: Acceptable DC current in push-pull output transformer due to tube mismatch?
  64. Toroid Power Transformer For GM-70 845 211 1000V
  65. Building the "Crystal Palace" Amp
  66. Improved Sound Card Interface - Ideas and Suggestions?
  67. Upgrading OPTs in production amp? (Yaquin MC-10L)
  68. any good Triode 6H8C preamp schematics out there???
  69. pushpull 6aq5 distortion
  70. Mr. Lian 845 SET more kit rather than commercial product.
  71. Opinion for otl ocl headphone amp
  72. Tube-newby wanting to make a good tube amp
  73. Anyone used a voltage tripler PS?
  74. Audioromy 828A / FU-29 tube layout
  75. Choosing Cathode Bypass Capacitor
  76. Ground loop gremlins
  77. Crackling Amp after Accident
  78. New CCS/ depletion mode MOSFETs available... experience anyone?
  79. Mengyue Mini
  80. Parafeed quest
  81. Determining linearity - differential gain stage
  82. 6HB6 - Any pratical experience?
  83. 27 Tube Preamp design questions
  84. Output Transformers Mount Position
  85. Critique please: Fixed bias 7591 SE
  86. Coupling Cap Improvements?
  87. RL 12T 15
  88. Tube instead of anode resistor
  89. HELP!! Terrible 50Hz hum in Mullard 10W DIY amp
  90. My New 45 SET (choke-loaded 6SN7, direct-coupled)
  91. Hf31 fidelity valve type
  92. Design of transformers for valve amplifiers.Part2
  93. Harman Kardon ta5000X alignment/manual
  94. Help with an analog meter hack
  95. dirkwright phono
  96. Zener Voltage Regulator
  97. Fisher X-101-B Substitute for 7591
  98. UNU-pnono riaa mm preamp
  99. My old amps
  100. Switching regulator on Kickstarter
  101. my yaqin 100b will not bias on v1 v3
  102. Zenith model B835R
  103. Want to build 2a3 amp for old radio
  104. Preamp Advice
  105. simple 5687 pre amp help
  106. Pulling TV From 61 Maggie Imperial Console?
  107. I can buy some 6U9's cheap - are they any good, and what could I build?
  108. K8011/K8010 PCB build thread
  109. Choosing an op point when using a tube 'off label'
  110. Choke inputs
  111. Unbalanced In > Balanced Out line amp - How To Do It?
  112. 6146b output transformer. I'm new and I need help.
  113. Your first DiY Low Cost/Low Voltage tube AMP
  114. Need some advice on OPT for kt88/6l6
  115. 1:1:1 transformers
  116. Output transformer in the cathode?
  117. Popping DC
  118. Power transformer wiring issues
  119. easy question - Magnavox 86-01 owners...
  120. Mic preamp input transformer alternative?
  121. What's the Best Way to Reduce Gain in a Preamp
  122. safety with high voltage input capacitor ?
  123. SE EL84 amp - reducing 100Hz hum
  124. Photos of large DHT preamps? (Or large amps in general)
  125. Minimum pin length (noval)
  126. Biasing of KT120
  127. SE to balanced transformer
  128. Decoupling Cap value - How Much?
  129. Cathode bypass Cap vs. No Bypass Cap
  130. Interesting circuit I thought.
  131. Yet another K12G thread
  132. 6N3 tube preamp question
  133. Driver vs Power tube
  134. Help in Bias tube amp for Adis Devy 7
  135. Tubes and HT
  136. HiFiMan EF-2A schematic sought
  137. Please, help with a WE91 project on behalf of a friend
  138. Proposed Headphone Amp Overhaul?
  139. protection of downstream line amp
  140. Is the 6E6P suitable for audio?
  141. me clone proto EL/PL 504
  142. Improving headphone amplifier
  143. 5902 LSTPICE Model
  144. Canary CA-301 PSU
  145. 3B28 oscilator
  146. A lot of schematics
  147. V8 amp
  148. market by Jac music
  149. 6P3C-1 SE ? .
  150. Cary slp70: Worth to upgrade?
  151. Hickok 123B tube tester
  152. Adding NFB makes headphone amp sound AWFUL!!!
  153. Filaments hard wired to B+ on EZ81 base
  154. What the bird is OS 18/600?
  155. ccs 10m90s what is wrong?
  156. Topology for balanced preamp
  157. 6v6 vs. 6l6 vs. 807 soundwise..
  158. Opinions/Advice on Triode Strap method
  159. Something like a Miniwatt N3 or APPJ PA0901A
  160. Extraordinary harmonics. Type 47 # tube amp.
  161. Made a new tube amp, 6J5 +27 +45
  162. Anyone ever play around with a GU-72?
  163. Possibility of using a UTC LMI-500 transformer...
  164. Aikido transformer
  165. Can someone explain why you need to re-adjust the balance on a tube amp every time
  166. Which factory made these tubes ?
  167. 813 and gm70
  168. 13E1 Push Pull
  169. dump find.
  170. ...6SN7GT operating points tube help.......
  171. 6L6 6SJ7 Amp please pick faults if any
  172. Updated DIY EL34B 6SJ7 SE Amp
  173. 6C18 x 6C33
  174. Vintage tube amp find
  175. any benefit to screen-grid drive a 6V6?
  176. Brown face Scott LK72
  177. Pilot 1060 integrated - make it better!
  178. Should I ground my K12G or my Bugle 2?
  179. 6c33 amp convert to 6c41
  180. STA-LEVEL thumbs problem
  181. Amp motorboating at power up
  182. Spice models for AL4 and RS242 tubes
  183. Mains Switch
  184. Suggestions for big output stage needed
  185. Very Good (or best?) 12B4 schematic?
  186. Amplifier for active bookshelf speakers
  187. Olson AM-240 schematic needed
  188. Valve amp - maintenance
  189. Your opinion about Rotel 930AX to hyrbid mod
  190. Weston Tube Tester 774-5
  191. Tube circuit sim software for free?
  192. 6v6 family tubes
  193. Troublesome bias resistor, cathodyne stage
  194. 6AQ5 excellent for line stage?
  195. Datasheet 6P42s and 6P45C
  196. Quad / Cyrus impedance matching
  197. Zobel network at primary audio trafo?
  198. ECL86 question
  199. 500c buzzing power transformer
  200. LM4702+6L6GB/807
  201. TubeAudio Mixer Blog
  202. Finally started on my 6L6 amp. Need tube suggestions.
  203. Just another Scott thread
  204. Design for overdriven output stage
  205. Seeking Articals On Audio Transformer Design & Construction.
  206. Bias el34 pp
  207. Photo Gallery.
  208. Precision S35
  209. 6L6WGB
  210. 6BQ7A Driver
  211. Advise for Simpson 340 signal generator problem
  212. Armaco TTHF or Calrad AP 15 What to do What to do?...
  213. Screen Power and Warmup
  214. Wanting copies of Prof. Alexander Bereskin's transformer winding pictures.
  215. what's the brand of this capacitor sounds great ?
  216. Edcor CXSE25-8-3.2K or Transcendar TT-017-OT?
  217. PP 2A3 Fixed Bias
  218. RL12P35 convert to el34
  219. Statistical regulator from VA 4rd edition
  220. Matching Impedances (the Math behind it) Please Advise if you have a grasp. Xfmrs etc
  221. Help 6AQ5 pushpull
  222. HV Logic Control Approach
  223. Valve heater question
  224. Phase inverter adjustment - Fisher 80AZ
  225. Repurposing a Bogen CHB-35A
  226. SMPS
  227. Interstage and bias failure
  228. Grid 2 current for GU19-1
  229. 6x5 tube
  230. IT coupled 6BG6GA
  231. Mystery noise has got me baffled
  232. Dynaco PAS: too much liposuction?
  233. LP Tape Noise
  234. YAKOV ARONOV MA-100
  235. Help for balance-tone control-mode selector bypass
  236. Opinions please: seeking a first class DIY SET amp design
  237. PSU for 6N6P
  238. HOT B+ capacitors!
  239. Analog meter monitoring HT supply
  240. Lamm LL2.1 DC Offset problem
  241. 6L6GT/6SJ7 Valve Amp DIY
  242. BHExchange for BottleHead's
  243. 6BY5GA elevated heater question
  244. Tone controls
  245. EL84 "IP" questions
  246. KIT Single ended KT88
  247. HELP needed - LEAK Varislope 2 Stereo + Stereo 20 with pictures...
  248. All tube cap tube amp?
  249. 12AX7 preamp for DAC
  250. Grid resistors -> GND

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