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  1. any good Triode 6H8C preamp schematics out there???
  2. pushpull 6aq5 distortion
  3. Mr. Lian 845 SET more kit rather than commercial product.
  4. Opinion for otl ocl headphone amp
  5. Tube-newby wanting to make a good tube amp
  6. Anyone used a voltage tripler PS?
  7. Audioromy 828A / FU-29 tube layout
  8. Choosing Cathode Bypass Capacitor
  9. Ground loop gremlins
  10. Crackling Amp after Accident
  11. New CCS/ depletion mode MOSFETs available... experience anyone?
  12. Mengyue Mini
  13. Parafeed quest
  14. Determining linearity - differential gain stage
  15. 6HB6 - Any pratical experience?
  16. 27 Tube Preamp design questions
  17. Output Transformers Mount Position
  18. Critique please: Fixed bias 7591 SE
  19. Coupling Cap Improvements?
  20. RL 12T 15
  21. Tube instead of anode resistor
  22. HELP!! Terrible 50Hz hum in Mullard 10W DIY amp
  23. My New 45 SET (choke-loaded 6SN7, direct-coupled)
  24. Hf31 fidelity valve type
  25. Design of transformers for valve amplifiers.Part2
  26. Harman Kardon ta5000X alignment/manual
  27. Help with an analog meter hack
  28. dirkwright phono
  29. Zener Voltage Regulator
  30. Fisher X-101-B Substitute for 7591
  31. UNU-pnono riaa mm preamp
  32. My old amps
  33. Switching regulator on Kickstarter
  34. my yaqin 100b will not bias on v1 v3
  35. Zenith model B835R
  36. Want to build 2a3 amp for old radio
  37. Preamp Advice
  38. simple 5687 pre amp help
  39. Pulling TV From 61 Maggie Imperial Console?
  40. I can buy some 6U9's cheap - are they any good, and what could I build?
  41. K8011/K8010 PCB build thread
  42. Choosing an op point when using a tube 'off label'
  43. Choke inputs
  44. Unbalanced In > Balanced Out line amp - How To Do It?
  45. 6146b output transformer. I'm new and I need help.
  46. Your first DiY Low Cost/Low Voltage tube AMP
  47. Need some advice on OPT for kt88/6l6
  48. 1:1:1 transformers
  49. Output transformer in the cathode?
  50. Popping DC
  51. Power transformer wiring issues
  52. easy question - Magnavox 86-01 owners...
  53. Mic preamp input transformer alternative?
  54. What's the Best Way to Reduce Gain in a Preamp
  55. safety with high voltage input capacitor ?
  56. SE EL84 amp - reducing 100Hz hum
  57. Photos of large DHT preamps? (Or large amps in general)
  58. Minimum pin length (noval)
  59. Biasing of KT120
  60. SE to balanced transformer
  61. Decoupling Cap value - How Much?
  62. Cathode bypass Cap vs. No Bypass Cap
  63. Interesting circuit I thought.
  64. Yet another K12G thread
  65. 6N3 tube preamp question
  66. Driver vs Power tube
  67. Help in Bias tube amp for Adis Devy 7
  68. Tubes and HT
  69. HiFiMan EF-2A schematic sought
  70. Please, help with a WE91 project on behalf of a friend
  71. Proposed Headphone Amp Overhaul?
  72. protection of downstream line amp
  73. Is the 6E6P suitable for audio?
  74. me clone proto EL/PL 504
  75. Improving headphone amplifier
  76. 5902 LSTPICE Model
  77. Canary CA-301 PSU
  78. 3B28 oscilator
  79. A lot of schematics
  80. V8 amp
  81. market by Jac music
  82. 6P3C-1 SE ? .
  83. Cary slp70: Worth to upgrade?
  84. Hickok 123B tube tester
  85. Adding NFB makes headphone amp sound AWFUL!!!
  86. Filaments hard wired to B+ on EZ81 base
  87. What the bird is OS 18/600?
  88. ccs 10m90s what is wrong?
  89. Topology for balanced preamp
  90. 6v6 vs. 6l6 vs. 807 soundwise..
  91. Opinions/Advice on Triode Strap method
  92. Something like a Miniwatt N3 or APPJ PA0901A
  93. Extraordinary harmonics. Type 47 # tube amp.
  94. Made a new tube amp, 6J5 +27 +45
  95. Anyone ever play around with a GU-72?
  96. Possibility of using a UTC LMI-500 transformer...
  97. Aikido transformer
  98. Can someone explain why you need to re-adjust the balance on a tube amp every time
  99. Which factory made these tubes ?
  100. 813 and gm70
  101. 13E1 Push Pull
  102. dump find.
  103. ...6SN7GT operating points tube help.......
  104. 6L6 6SJ7 Amp please pick faults if any
  105. Updated DIY EL34B 6SJ7 SE Amp
  106. 6C18 x 6C33
  107. Vintage tube amp find
  108. any benefit to screen-grid drive a 6V6?
  109. Brown face Scott LK72
  110. Pilot 1060 integrated - make it better!
  111. Should I ground my K12G or my Bugle 2?
  112. 6c33 amp convert to 6c41
  113. STA-LEVEL thumbs problem
  114. Amp motorboating at power up
  115. Spice models for AL4 and RS242 tubes
  116. Mains Switch
  117. Suggestions for big output stage needed
  118. Very Good (or best?) 12B4 schematic?
  119. Amplifier for active bookshelf speakers
  120. Olson AM-240 schematic needed
  121. Valve amp - maintenance
  122. Your opinion about Rotel 930AX to hyrbid mod
  123. Weston Tube Tester 774-5
  124. Tube circuit sim software for free?
  125. 6v6 family tubes
  126. Troublesome bias resistor, cathodyne stage
  127. 6AQ5 excellent for line stage?
  128. Datasheet 6P42s and 6P45C
  129. Quad / Cyrus impedance matching
  130. Zobel network at primary audio trafo?
  131. ECL86 question
  132. 500c buzzing power transformer
  133. LM4702+6L6GB/807
  134. TubeAudio Mixer Blog
  135. Finally started on my 6L6 amp. Need tube suggestions.
  136. Just another Scott thread
  137. Design for overdriven output stage
  138. Seeking Articals On Audio Transformer Design & Construction.
  139. Bias el34 pp
  140. Photo Gallery.
  141. Precision S35
  142. 6L6WGB
  143. 6BQ7A Driver
  144. Advise for Simpson 340 signal generator problem
  145. Armaco TTHF or Calrad AP 15 What to do What to do?...
  146. Screen Power and Warmup
  147. Wanting copies of Prof. Alexander Bereskin's transformer winding pictures.
  148. what's the brand of this capacitor sounds great ?
  149. Edcor CXSE25-8-3.2K or Transcendar TT-017-OT?
  150. PP 2A3 Fixed Bias
  151. RL12P35 convert to el34
  152. Statistical regulator from VA 4rd edition
  153. Matching Impedances (the Math behind it) Please Advise if you have a grasp. Xfmrs etc
  154. Help 6AQ5 pushpull
  155. HV Logic Control Approach
  156. Valve heater question
  157. Phase inverter adjustment - Fisher 80AZ
  158. Repurposing a Bogen CHB-35A
  159. SMPS
  160. Interstage and bias failure
  161. Grid 2 current for GU19-1
  162. 6x5 tube
  163. IT coupled 6BG6GA
  164. Mystery noise has got me baffled
  165. Dynaco PAS: too much liposuction?
  166. LP Tape Noise
  167. YAKOV ARONOV MA-100
  168. Help for balance-tone control-mode selector bypass
  169. Design of transformers for valve amplifiers
  170. Opinions please: seeking a first class DIY SET amp design
  171. PSU for 6N6P
  172. HOT B+ capacitors!
  173. Analog meter monitoring HT supply
  174. Lamm LL2.1 DC Offset problem
  175. 6L6GT/6SJ7 Valve Amp DIY
  176. BHExchange for BottleHead's
  177. 6BY5GA elevated heater question
  178. Tone controls
  179. EL84 "IP" questions
  180. KIT Single ended KT88
  181. HELP needed - LEAK Varislope 2 Stereo + Stereo 20 with pictures...
  182. All tube cap tube amp?
  183. 12AX7 preamp for DAC
  184. Grid resistors -> GND
  185. OTL headphone amp distorting & clipping: weak power supply?
  186. Broken bias resistors (Yaqin MC-10L)
  187. Tube Enclosure suggestion from Europe.
  188. Benefit/SQ of tube stage at the input of ss power amp
  189. Is 6907 and QQV03-20A tubes are same?
  190. Found some chokes
  191. 6SN7 at low plate currents
  192. 12AU7, 12BH7, Darker Less Bright Option
  193. Heater current effects
  194. Not using all the sections on multi-section cap
  195. DC heater supply dies on me
  196. 1972 Leak Varislope 2 Stereo
  197. OPT secondary ground, stacked supplies
  198. OTL for HeaPhone
  199. Voltage doubler and filament supply
  200. Please suggest me a 6V6 class AB amp
  201. Need Review of wiring up of this SRPP 6AS7 tube amp
  202. Hum in a triode 1H6G...help !
  203. 40w Class A PP KT66?
  204. My new small amp EL84 SE Triode
  205. tube preamp output impedance
  206. pete millet 807 amp
  207. Lost Negative Bias-Fixed Bias
  208. Aikido ('dead quiet') output impedance
  209. Looking for lineamp buffer schematics
  210. Nagra VPA 845
  211. How to match 6C45?
  212. Yet another question about cathode bias (led+pnp)
  213. Ideal System for 1960?
  214. What replaces an IN541 diode?
  215. Bottlehead Eros or Tube4Hifi PH16
  216. Psvane 2a3 T Mk II reliable vender
  217. Odd Wima cap markings
  218. Chinese Amp kit experience
  219. Considerations about headph. OCL
  220. Trying to solve a Plate Follower Problem
  221. Nichicon Caps
  222. Footprint Noval ECC83 Altium
  223. Interference in hybrid amp
  224. wiring DHT filaments with center tapped secondaries
  225. B+ of Curcio Daniel II
  226. Stepped Attenuators Questions
  227. Noisy Ground? (Probably not a loop)
  228. New Production Telefunken
  229. Tube horizontal mounting position
  230. "Ask Jan First" parts website in Germany
  231. EZ215 Stereo 5881 Amp Project
  232. CCS help dn2540 send 340v to the chassis
  233. That's What She Said RH84 Build Log
  234. Help figuring out this output transformer.
  235. 5881 PPP Cathode Bias B+
  236. Measuring DHT filament V with minimal effect.
  237. 100hz hum with Audio Research vs-55
  238. Volume potentiometer
  239. Driver for 2A3C
  240. Regulated B+ sounds worse?
  241. Sylvania console amp rebuild...
  242. E130L Micron
  243. Question Re: Ground Loop Breakers
  244. Source for D3A/7721?
  245. ID a salvaged choke
  246. Magnetwire gauge size converted to metric
  247. ccs what is the best way
  248. parafeed test/measurement setup question.
  249. how do balance pots work?
  250. Issue with parafeed in SPICE

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