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  1. Including a C- winding on a filament transformer
  2. CINEMAG 15B TRANSFORMERS balanced>unbalanced
  3. Rebuilt Heathkit AA32 with hum on MAG PHONO input
  4. Tube Socket ID
  5. JJ 5Y3S is too tall...need smaller tube
  6. Uniamp 2A3
  7. buzz noise from paraphase circuit
  8. Benefits of Enhanced Triode Connection
  9. Working out a valves load resistance?
  10. 813 Alternatives
  11. Help 6N6T pinout
  12. Very large parafeed cap
  13. Bright purple flash 6N1P
  14. Harman Kardon Citation II - rebuild questions
  15. Stoetkit junior mk2
  16. 1619 Push pull output stage
  17. Tube getter
  18. The sensation of the 21st Century. Galvanic SUPER HIGH END PP power for all types of
  19. Audible Illusions and 6922
  20. quick access tube amp protection
  21. Identifying Genalex KT66 matched pair question
  22. Hunting 100Hz noise in SRPP+ stage
  23. JJ ECC83S Biasing conditions
  24. Audiophiletalk - Dirt Cheap SE
  25. 12AL8 Head-Amp with UTC Output Transformer
  26. SET monoblocks?
  27. EL84 Push Pull design from left over parts
  28. Strange UL Transformers
  29. Stabilization balanced currents in the PP stage.
  30. Current mirror stage in PP
  31. EL34 SE ultralinear schematic
  32. Question: Acceptable DC current in push-pull output transformer due to tube mismatch?
  33. Toroid Power Transformer For GM-70 845 211 1000V
  34. Building the "Crystal Palace" Amp
  35. Improved Sound Card Interface - Ideas and Suggestions?
  36. Upgrading OPTs in production amp? (Yaquin MC-10L)
  37. any good Triode 6H8C preamp schematics out there???
  38. pushpull 6aq5 distortion
  39. Mr. Lian 845 SET more kit rather than commercial product.
  40. Opinion for otl ocl headphone amp
  41. Tube-newby wanting to make a good tube amp
  42. Anyone used a voltage tripler PS?
  43. Audioromy 828A / FU-29 tube layout
  44. Choosing Cathode Bypass Capacitor
  45. Ground loop gremlins
  46. Crackling Amp after Accident
  47. New CCS/ depletion mode MOSFETs available... experience anyone?
  48. Mengyue Mini
  49. Parafeed quest
  50. Determining linearity - differential gain stage
  51. 6HB6 - Any pratical experience?
  52. 27 Tube Preamp design questions
  53. Output Transformers Mount Position
  54. Critique please: Fixed bias 7591 SE
  55. Coupling Cap Improvements?
  56. RL 12T 15
  57. Tube instead of anode resistor
  58. HELP!! Terrible 50Hz hum in Mullard 10W DIY amp
  59. My New 45 SET (choke-loaded 6SN7, direct-coupled)
  60. Hf31 fidelity valve type
  61. Design of transformers for valve amplifiers.Part2
  62. Harman Kardon ta5000X alignment/manual
  63. Help with an analog meter hack
  64. dirkwright phono
  65. Zener Voltage Regulator
  66. Fisher X-101-B Substitute for 7591
  67. UNU-pnono riaa mm preamp
  68. My old amps
  69. Switching regulator on Kickstarter
  70. my yaqin 100b will not bias on v1 v3
  71. Zenith model B835R
  72. Want to build 2a3 amp for old radio
  73. Preamp Advice
  74. simple 5687 pre amp help
  75. Pulling TV From 61 Maggie Imperial Console?
  76. I can buy some 6U9's cheap - are they any good, and what could I build?
  77. K8011/K8010 PCB build thread
  78. Choosing an op point when using a tube 'off label'
  79. Choke inputs
  80. Unbalanced In > Balanced Out line amp - How To Do It?
  81. 6146b output transformer. I'm new and I need help.
  82. Your first DiY Low Cost/Low Voltage tube AMP
  83. Need some advice on OPT for kt88/6l6
  84. 1:1:1 transformers
  85. Output transformer in the cathode?
  86. Popping DC
  87. Power transformer wiring issues
  88. easy question - Magnavox 86-01 owners...
  89. Mic preamp input transformer alternative?
  90. What's the Best Way to Reduce Gain in a Preamp
  91. safety with high voltage input capacitor ?
  92. SE EL84 amp - reducing 100Hz hum
  93. Photos of large DHT preamps? (Or large amps in general)
  94. Minimum pin length (noval)
  95. Biasing of KT120
  96. SE to balanced transformer
  97. Decoupling Cap value - How Much?
  98. Cathode bypass Cap vs. No Bypass Cap
  99. Interesting circuit I thought.
  100. Yet another K12G thread
  101. 6N3 tube preamp question
  102. Driver vs Power tube
  103. Help in Bias tube amp for Adis Devy 7
  104. Tubes and HT
  105. HiFiMan EF-2A schematic sought
  106. Please, help with a WE91 project on behalf of a friend
  107. Proposed Headphone Amp Overhaul?
  108. protection of downstream line amp
  109. Is the 6E6P suitable for audio?
  110. me clone proto EL/PL 504
  111. Improving headphone amplifier
  112. 5902 LSTPICE Model
  113. Canary CA-301 PSU
  114. 3B28 oscilator
  115. A lot of schematics
  116. V8 amp
  117. market by Jac music
  118. 6P3C-1 SE ? .
  119. Cary slp70: Worth to upgrade?
  120. Hickok 123B tube tester
  121. Adding NFB makes headphone amp sound AWFUL!!!
  122. Filaments hard wired to B+ on EZ81 base
  123. What the bird is OS 18/600?
  124. ccs 10m90s what is wrong?
  125. Topology for balanced preamp
  126. 6v6 vs. 6l6 vs. 807 soundwise..
  127. Opinions/Advice on Triode Strap method
  128. Something like a Miniwatt N3 or APPJ PA0901A
  129. Extraordinary harmonics. Type 47 # tube amp.
  130. Made a new tube amp, 6J5 +27 +45
  131. Anyone ever play around with a GU-72?
  132. Possibility of using a UTC LMI-500 transformer...
  133. Aikido transformer
  134. Can someone explain why you need to re-adjust the balance on a tube amp every time
  135. Which factory made these tubes ?
  136. 813 and gm70
  137. 13E1 Push Pull
  138. dump find.
  139. ...6SN7GT operating points tube help.......
  140. 6L6 6SJ7 Amp please pick faults if any
  141. Updated DIY EL34B 6SJ7 SE Amp
  142. 6C18 x 6C33
  143. Vintage tube amp find
  144. any benefit to screen-grid drive a 6V6?
  145. Brown face Scott LK72
  146. Pilot 1060 integrated - make it better!
  147. Should I ground my K12G or my Bugle 2?
  148. 6c33 amp convert to 6c41
  149. STA-LEVEL thumbs problem
  150. Amp motorboating at power up
  151. Spice models for AL4 and RS242 tubes
  152. Mains Switch
  153. Suggestions for big output stage needed
  154. Very Good (or best?) 12B4 schematic?
  155. Amplifier for active bookshelf speakers
  156. Olson AM-240 schematic needed
  157. Valve amp - maintenance
  158. Your opinion about Rotel 930AX to hyrbid mod
  159. Weston Tube Tester 774-5
  160. Tube circuit sim software for free?
  161. 6v6 family tubes
  162. Troublesome bias resistor, cathodyne stage
  163. 6AQ5 excellent for line stage?
  164. Datasheet 6P42s and 6P45C
  165. Quad / Cyrus impedance matching
  166. Zobel network at primary audio trafo?
  167. ECL86 question
  168. 500c buzzing power transformer
  169. LM4702+6L6GB/807
  170. TubeAudio Mixer Blog
  171. Finally started on my 6L6 amp. Need tube suggestions.
  172. Just another Scott thread
  173. Design for overdriven output stage
  174. Seeking Articals On Audio Transformer Design & Construction.
  175. Bias el34 pp
  176. Photo Gallery.
  177. Precision S35
  178. 6L6WGB
  179. 6BQ7A Driver
  180. Advise for Simpson 340 signal generator problem
  181. Armaco TTHF or Calrad AP 15 What to do What to do?...
  182. Screen Power and Warmup
  183. Wanting copies of Prof. Alexander Bereskin's transformer winding pictures.
  184. Edcor CXSE25-8-3.2K or Transcendar TT-017-OT?
  185. PP 2A3 Fixed Bias
  186. RL12P35 convert to el34
  187. Statistical regulator from VA 4rd edition
  188. Matching Impedances (the Math behind it) Please Advise if you have a grasp. Xfmrs etc
  189. Help 6AQ5 pushpull
  190. HV Logic Control Approach
  191. Valve heater question
  192. Phase inverter adjustment - Fisher 80AZ
  193. Repurposing a Bogen CHB-35A
  194. SMPS
  195. Interstage and bias failure
  196. Grid 2 current for GU19-1
  197. 6x5 tube
  198. IT coupled 6BG6GA
  199. Mystery noise has got me baffled
  200. Dynaco PAS: too much liposuction?
  201. LP Tape Noise
  202. YAKOV ARONOV MA-100
  203. Help for balance-tone control-mode selector bypass
  204. Design of transformers for valve amplifiers
  205. Opinions please: seeking a first class DIY SET amp design
  206. PSU for 6N6P
  207. HOT B+ capacitors!
  208. Analog meter monitoring HT supply
  209. Lamm LL2.1 DC Offset problem
  210. 6L6GT/6SJ7 Valve Amp DIY
  211. BHExchange for BottleHead's
  212. 6BY5GA elevated heater question
  213. Tone controls
  214. EL84 "IP" questions
  215. KIT Single ended KT88
  216. HELP needed - LEAK Varislope 2 Stereo + Stereo 20 with pictures...
  217. All tube cap tube amp?
  218. 12AX7 preamp for DAC
  219. Grid resistors -> GND
  220. OTL headphone amp distorting & clipping: weak power supply?
  221. Broken bias resistors (Yaqin MC-10L)
  222. Tube Enclosure suggestion from Europe.
  223. Benefit/SQ of tube stage at the input of ss power amp
  224. Is 6907 and QQV03-20A tubes are same?
  225. Found some chokes
  226. 6SN7 at low plate currents
  227. 12AU7, 12BH7, Darker Less Bright Option
  228. Heater current effects
  229. Not using all the sections on multi-section cap
  230. DC heater supply dies on me
  231. 1972 Leak Varislope 2 Stereo
  232. OPT secondary ground, stacked supplies
  233. OTL for HeaPhone
  234. Voltage doubler and filament supply
  235. Please suggest me a 6V6 class AB amp
  236. Need Review of wiring up of this SRPP 6AS7 tube amp
  237. Hum in a triode 1H6G...help !
  238. 40w Class A PP KT66?
  239. My new small amp EL84 SE Triode
  240. tube preamp output impedance
  241. pete millet 807 amp
  242. Lost Negative Bias-Fixed Bias
  243. Aikido ('dead quiet') output impedance
  244. Looking for lineamp buffer schematics
  245. Nagra VPA 845
  246. How to match 6C45?
  247. Yet another question about cathode bias (led+pnp)
  248. Ideal System for 1960?
  249. What replaces an IN541 diode?
  250. Bottlehead Eros or Tube4Hifi PH16

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