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

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