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  1. Lumley M120 Monoblocks - Need Manual, schematic or anything !!!
  2. Substituting higher wattage resistors
  3. cap coupling to interstage transformer or direct coupling?
  4. A question of feedback..
  5. Two Monoblocks "Dying" Within Days Of Each Other
  6. Russian 1Zh24B Pentods / design assistance.
  7. What Tubes for 5.8k PP transformers
  8. Problem with a power transformer.
  9. 300B OTL Preamp/Headphone Amp
  10. tantalum resistors
  11. 6BM8 in STC mode
  12. My Moscode again: What is the bias current?
  13. OTL WCF headphone amp build + awesome prototype material
  14. Type 42 single ended ideas
  15. Help with my Moscode 300 amp
  16. Thoughts on this volume potentiometer?
  17. Optimum load impedance for PCL85?
  18. Croatian triode Festival 2014.
  19. Old ekco tv transformers
  20. vacuum tube score.. what to do with
  21. Valve based disco mixer.
  22. Webcor ceramic phono input circuitry suggestions?
  23. Position of OPT windings
  24. sd2 seven pin??
  25. Help design a Small 250VDC PSU for tube preamp
  26. Bright Driver Tubes 12AU7, 12BH7, 5814...
  27. Question about using tube socket center hole for star ground
  28. Heathkit UA-2 clone project
  29. Schematic CAD Program
  30. Latest on the RH amps..
  31. Transformer design program
  32. 807 "Musicians Amplifier" help
  33. J.E. LABS PP2A3 POWER SUPPLY ?
  34. Mono Block Building Project
  35. EL34 CCS ideas
  36. Magnavox 8601-20
  37. wood/metal vs all-metal chassis
  38. Design data on dry battery tubes
  39. Differential tube with a gain stage 1178
  40. 6C4C tube ...Good to buy ?
  41. Including a C- winding on a filament transformer
  42. CINEMAG 15B TRANSFORMERS balanced>unbalanced
  43. Rebuilt Heathkit AA32 with hum on MAG PHONO input
  44. Electrolytic cap question
  45. Tube Socket ID
  46. JJ 5Y3S is too tall...need smaller tube
  47. Uniamp 2A3
  48. buzz noise from paraphase circuit
  49. Benefits of Enhanced Triode Connection
  50. Working out a valves load resistance?
  51. 813 Alternatives
  52. Help 6N6T pinout
  53. Very large parafeed cap
  54. Bright purple flash 6N1P
  55. Harman Kardon Citation II - rebuild questions
  56. Stoetkit junior mk2
  57. 1619 Push pull output stage
  58. Tube getter
  59. The sensation of the 21st Century. Galvanic SUPER HIGH END PP power for all types of
  60. Audible Illusions and 6922
  61. quick access tube amp protection
  62. Identifying Genalex KT66 matched pair question
  63. Hunting 100Hz noise in SRPP+ stage
  64. JJ ECC83S Biasing conditions
  65. Audiophiletalk - Dirt Cheap SE
  66. 12AL8 Head-Amp with UTC Output Transformer
  67. SET monoblocks?
  68. EL84 Push Pull design from left over parts
  69. Strange UL Transformers
  70. Stabilization balanced currents in the PP stage.
  71. Current mirror stage in PP
  72. EL34 SE ultralinear schematic
  73. Question: Acceptable DC current in push-pull output transformer due to tube mismatch?
  74. Toroid Power Transformer For GM-70 845 211 1000V
  75. Building the "Crystal Palace" Amp
  76. Improved Sound Card Interface - Ideas and Suggestions?
  77. Upgrading OPTs in production amp? (Yaquin MC-10L)
  78. any good Triode 6H8C preamp schematics out there???
  79. pushpull 6aq5 distortion
  80. Mr. Lian 845 SET more kit rather than commercial product.
  81. Opinion for otl ocl headphone amp
  82. Tube-newby wanting to make a good tube amp
  83. Anyone used a voltage tripler PS?
  84. Audioromy 828A / FU-29 tube layout
  85. Choosing Cathode Bypass Capacitor
  86. Ground loop gremlins
  87. Crackling Amp after Accident
  88. New CCS/ depletion mode MOSFETs available... experience anyone?
  89. Mengyue Mini
  90. Parafeed quest
  91. Determining linearity - differential gain stage
  92. 6HB6 - Any pratical experience?
  93. 27 Tube Preamp design questions
  94. Output Transformers Mount Position
  95. Critique please: Fixed bias 7591 SE
  96. Coupling Cap Improvements?
  97. RL 12T 15
  98. Tube instead of anode resistor
  99. HELP!! Terrible 50Hz hum in Mullard 10W DIY amp
  100. My New 45 SET (choke-loaded 6SN7, direct-coupled)
  101. Hf31 fidelity valve type
  102. Design of transformers for valve amplifiers.Part2
  103. Harman Kardon ta5000X alignment/manual
  104. Help with an analog meter hack
  105. dirkwright phono
  106. Zener Voltage Regulator
  107. Fisher X-101-B Substitute for 7591
  108. UNU-pnono riaa mm preamp
  109. My old amps
  110. Switching regulator on Kickstarter
  111. my yaqin 100b will not bias on v1 v3
  112. Zenith model B835R
  113. Want to build 2a3 amp for old radio
  114. Preamp Advice
  115. simple 5687 pre amp help
  116. Pulling TV From 61 Maggie Imperial Console?
  117. I can buy some 6U9's cheap - are they any good, and what could I build?
  118. K8011/K8010 PCB build thread
  119. Choosing an op point when using a tube 'off label'
  120. Choke inputs
  121. Unbalanced In > Balanced Out line amp - How To Do It?
  122. 6146b output transformer. I'm new and I need help.
  123. Your first DiY Low Cost/Low Voltage tube AMP
  124. Need some advice on OPT for kt88/6l6
  125. 1:1:1 transformers
  126. Output transformer in the cathode?
  127. Popping DC
  128. Power transformer wiring issues
  129. easy question - Magnavox 86-01 owners...
  130. Mic preamp input transformer alternative?
  131. What's the Best Way to Reduce Gain in a Preamp
  132. safety with high voltage input capacitor ?
  133. SE EL84 amp - reducing 100Hz hum
  134. Photos of large DHT preamps? (Or large amps in general)
  135. Minimum pin length (noval)
  136. Biasing of KT120
  137. SE to balanced transformer
  138. Decoupling Cap value - How Much?
  139. Cathode bypass Cap vs. No Bypass Cap
  140. Interesting circuit I thought.
  141. Yet another K12G thread
  142. 6N3 tube preamp question
  143. Driver vs Power tube
  144. Help in Bias tube amp for Adis Devy 7
  145. Tubes and HT
  146. HiFiMan EF-2A schematic sought
  147. Please, help with a WE91 project on behalf of a friend
  148. Proposed Headphone Amp Overhaul?
  149. protection of downstream line amp
  150. Is the 6E6P suitable for audio?
  151. me clone proto EL/PL 504
  152. Improving headphone amplifier
  153. 5902 LSTPICE Model
  154. Canary CA-301 PSU
  155. 3B28 oscilator
  156. A lot of schematics
  157. V8 amp
  158. market by Jac music
  159. 6P3C-1 SE ? .
  160. Cary slp70: Worth to upgrade?
  161. Hickok 123B tube tester
  162. Adding NFB makes headphone amp sound AWFUL!!!
  163. Filaments hard wired to B+ on EZ81 base
  164. What the bird is OS 18/600?
  165. ccs 10m90s what is wrong?
  166. Topology for balanced preamp
  167. 6v6 vs. 6l6 vs. 807 soundwise..
  168. Opinions/Advice on Triode Strap method
  169. Something like a Miniwatt N3 or APPJ PA0901A
  170. Extraordinary harmonics. Type 47 # tube amp.
  171. Made a new tube amp, 6J5 +27 +45
  172. Anyone ever play around with a GU-72?
  173. Possibility of using a UTC LMI-500 transformer...
  174. Aikido transformer
  175. Can someone explain why you need to re-adjust the balance on a tube amp every time
  176. Which factory made these tubes ?
  177. 813 and gm70
  178. 13E1 Push Pull
  179. dump find.
  180. ...6SN7GT operating points tube help.......
  181. 6L6 6SJ7 Amp please pick faults if any
  182. Updated DIY EL34B 6SJ7 SE Amp
  183. 6C18 x 6C33
  184. Vintage tube amp find
  185. any benefit to screen-grid drive a 6V6?
  186. Brown face Scott LK72
  187. Pilot 1060 integrated - make it better!
  188. Should I ground my K12G or my Bugle 2?
  189. 6c33 amp convert to 6c41
  190. STA-LEVEL thumbs problem
  191. Amp motorboating at power up
  192. Spice models for AL4 and RS242 tubes
  193. Mains Switch
  194. Suggestions for big output stage needed
  195. Very Good (or best?) 12B4 schematic?
  196. Amplifier for active bookshelf speakers
  197. Olson AM-240 schematic needed
  198. Valve amp - maintenance
  199. Your opinion about Rotel 930AX to hyrbid mod
  200. Weston Tube Tester 774-5
  201. Tube circuit sim software for free?
  202. 6v6 family tubes
  203. Troublesome bias resistor, cathodyne stage
  204. 6AQ5 excellent for line stage?
  205. Datasheet 6P42s and 6P45C
  206. Quad / Cyrus impedance matching
  207. Zobel network at primary audio trafo?
  208. ECL86 question
  209. 500c buzzing power transformer
  210. LM4702+6L6GB/807
  211. TubeAudio Mixer Blog
  212. Finally started on my 6L6 amp. Need tube suggestions.
  213. Just another Scott thread
  214. Design for overdriven output stage
  215. Seeking Articals On Audio Transformer Design & Construction.
  216. Bias el34 pp
  217. Photo Gallery.
  218. Precision S35
  219. 6L6WGB
  220. 6BQ7A Driver
  221. Advise for Simpson 340 signal generator problem
  222. Armaco TTHF or Calrad AP 15 What to do What to do?...
  223. Screen Power and Warmup
  224. Wanting copies of Prof. Alexander Bereskin's transformer winding pictures.
  225. what's the brand of this capacitor sounds great ?
  226. Edcor CXSE25-8-3.2K or Transcendar TT-017-OT?
  227. PP 2A3 Fixed Bias
  228. RL12P35 convert to el34
  229. Statistical regulator from VA 4rd edition
  230. Matching Impedances (the Math behind it) Please Advise if you have a grasp. Xfmrs etc
  231. Help 6AQ5 pushpull
  232. HV Logic Control Approach
  233. Valve heater question
  234. Phase inverter adjustment - Fisher 80AZ
  235. Repurposing a Bogen CHB-35A
  236. SMPS
  237. Interstage and bias failure
  238. Grid 2 current for GU19-1
  239. 6x5 tube
  240. IT coupled 6BG6GA
  241. Mystery noise has got me baffled
  242. Dynaco PAS: too much liposuction?
  243. LP Tape Noise
  244. YAKOV ARONOV MA-100
  245. Help for balance-tone control-mode selector bypass
  246. Opinions please: seeking a first class DIY SET amp design
  247. PSU for 6N6P
  248. HOT B+ capacitors!
  249. Analog meter monitoring HT supply
  250. Lamm LL2.1 DC Offset problem

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