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  1. Tube-newby wanting to make a good tube amp
  2. Anyone used a voltage tripler PS?
  3. Audioromy 828A / FU-29 tube layout
  4. Choosing Cathode Bypass Capacitor
  5. Ground loop gremlins
  6. Crackling Amp after Accident
  7. New CCS/ depletion mode MOSFETs available... experience anyone?
  8. Mengyue Mini
  9. Parafeed quest
  10. Determining linearity - differential gain stage
  11. 6HB6 - Any pratical experience?
  12. 27 Tube Preamp design questions
  13. Output Transformers Mount Position
  14. Critique please: Fixed bias 7591 SE
  15. Coupling Cap Improvements?
  16. RL 12T 15
  17. Tube instead of anode resistor
  18. HELP!! Terrible 50Hz hum in Mullard 10W DIY amp
  19. My New 45 SET (choke-loaded 6SN7, direct-coupled)
  20. Hf31 fidelity valve type
  21. Design of transformers for valve amplifiers.Part2
  22. Harman Kardon ta5000X alignment/manual
  23. Help with an analog meter hack
  24. dirkwright phono
  25. Zener Voltage Regulator
  26. Fisher X-101-B Substitute for 7591
  27. UNU-pnono riaa mm preamp
  28. My old amps
  29. Switching regulator on Kickstarter
  30. my yaqin 100b will not bias on v1 v3
  31. Zenith model B835R
  32. Want to build 2a3 amp for old radio
  33. Preamp Advice
  34. simple 5687 pre amp help
  35. Pulling TV From 61 Maggie Imperial Console?
  36. I can buy some 6U9's cheap - are they any good, and what could I build?
  37. K8011/K8010 PCB build thread
  38. Choosing an op point when using a tube 'off label'
  39. Choke inputs
  40. Unbalanced In > Balanced Out line amp - How To Do It?
  41. 6146b output transformer. I'm new and I need help.
  42. Your first DiY Low Cost/Low Voltage tube AMP
  43. Need some advice on OPT for kt88/6l6
  44. 1:1:1 transformers
  45. Output transformer in the cathode?
  46. Popping DC
  47. Power transformer wiring issues
  48. easy question - Magnavox 86-01 owners...
  49. Mic preamp input transformer alternative?
  50. What's the Best Way to Reduce Gain in a Preamp
  51. safety with high voltage input capacitor ?
  52. SE EL84 amp - reducing 100Hz hum
  53. Photos of large DHT preamps? (Or large amps in general)
  54. Minimum pin length (noval)
  55. Biasing of KT120
  56. SE to balanced transformer
  57. Decoupling Cap value - How Much?
  58. Cathode bypass Cap vs. No Bypass Cap
  59. Interesting circuit I thought.
  60. Yet another K12G thread
  61. 6N3 tube preamp question
  62. Driver vs Power tube
  63. Help in Bias tube amp for Adis Devy 7
  64. Tubes and HT
  65. HiFiMan EF-2A schematic sought
  66. Please, help with a WE91 project on behalf of a friend
  67. Proposed Headphone Amp Overhaul?
  68. protection of downstream line amp
  69. Is the 6E6P suitable for audio?
  70. me clone proto EL/PL 504
  71. Improving headphone amplifier
  72. 5902 LSTPICE Model
  73. Canary CA-301 PSU
  74. 3B28 oscilator
  75. A lot of schematics
  76. V8 amp
  77. market by Jac music
  78. 6P3C-1 SE ? .
  79. Cary slp70: Worth to upgrade?
  80. Hickok 123B tube tester
  81. Adding NFB makes headphone amp sound AWFUL!!!
  82. Filaments hard wired to B+ on EZ81 base
  83. What the bird is OS 18/600?
  84. ccs 10m90s what is wrong?
  85. Topology for balanced preamp
  86. 6v6 vs. 6l6 vs. 807 soundwise..
  87. Opinions/Advice on Triode Strap method
  88. Something like a Miniwatt N3 or APPJ PA0901A
  89. Extraordinary harmonics. Type 47 # tube amp.
  90. Made a new tube amp, 6J5 +27 +45
  91. Anyone ever play around with a GU-72?
  92. Possibility of using a UTC LMI-500 transformer...
  93. Aikido transformer
  94. Can someone explain why you need to re-adjust the balance on a tube amp every time
  95. Which factory made these tubes ?
  96. 813 and gm70
  97. 13E1 Push Pull
  98. dump find.
  99. ...6SN7GT operating points tube help.......
  100. 6L6 6SJ7 Amp please pick faults if any
  101. Updated DIY EL34B 6SJ7 SE Amp
  102. 6C18 x 6C33
  103. Vintage tube amp find
  104. any benefit to screen-grid drive a 6V6?
  105. Brown face Scott LK72
  106. Pilot 1060 integrated - make it better!
  107. Should I ground my K12G or my Bugle 2?
  108. 6c33 amp convert to 6c41
  109. STA-LEVEL thumbs problem
  110. Amp motorboating at power up
  111. Spice models for AL4 and RS242 tubes
  112. Mains Switch
  113. Suggestions for big output stage needed
  114. Very Good (or best?) 12B4 schematic?
  115. Amplifier for active bookshelf speakers
  116. Olson AM-240 schematic needed
  117. Valve amp - maintenance
  118. Your opinion about Rotel 930AX to hyrbid mod
  119. Weston Tube Tester 774-5
  120. Tube circuit sim software for free?
  121. 6v6 family tubes
  122. Troublesome bias resistor, cathodyne stage
  123. 6AQ5 excellent for line stage?
  124. Datasheet 6P42s and 6P45C
  125. Quad / Cyrus impedance matching
  126. Zobel network at primary audio trafo?
  127. ECL86 question
  128. 500c buzzing power transformer
  129. LM4702+6L6GB/807
  130. TubeAudio Mixer Blog
  131. Finally started on my 6L6 amp. Need tube suggestions.
  132. Just another Scott thread
  133. Design for overdriven output stage
  134. Seeking Articals On Audio Transformer Design & Construction.
  135. Bias el34 pp
  136. Photo Gallery.
  137. Precision S35
  138. 6L6WGB
  139. 6BQ7A Driver
  140. Advise for Simpson 340 signal generator problem
  141. Armaco TTHF or Calrad AP 15 What to do What to do?...
  142. Screen Power and Warmup
  143. Wanting copies of Prof. Alexander Bereskin's transformer winding pictures.
  144. what's the brand of this capacitor sounds great ?
  145. Edcor CXSE25-8-3.2K or Transcendar TT-017-OT?
  146. PP 2A3 Fixed Bias
  147. RL12P35 convert to el34
  148. Statistical regulator from VA 4rd edition
  149. Matching Impedances (the Math behind it) Please Advise if you have a grasp. Xfmrs etc
  150. Help 6AQ5 pushpull
  151. HV Logic Control Approach
  152. Valve heater question
  153. Phase inverter adjustment - Fisher 80AZ
  154. Repurposing a Bogen CHB-35A
  155. SMPS
  156. Interstage and bias failure
  157. Grid 2 current for GU19-1
  158. 6x5 tube
  159. IT coupled 6BG6GA
  160. Mystery noise has got me baffled
  161. Dynaco PAS: too much liposuction?
  162. LP Tape Noise
  163. YAKOV ARONOV MA-100
  164. Help for balance-tone control-mode selector bypass
  165. Design of transformers for valve amplifiers
  166. Opinions please: seeking a first class DIY SET amp design
  167. PSU for 6N6P
  168. HOT B+ capacitors!
  169. Analog meter monitoring HT supply
  170. Lamm LL2.1 DC Offset problem
  171. 6L6GT/6SJ7 Valve Amp DIY
  172. BHExchange for BottleHead's
  173. 6BY5GA elevated heater question
  174. Tone controls
  175. EL84 "IP" questions
  176. KIT Single ended KT88
  177. HELP needed - LEAK Varislope 2 Stereo + Stereo 20 with pictures...
  178. All tube cap tube amp?
  179. 12AX7 preamp for DAC
  180. Grid resistors -> GND
  181. OTL headphone amp distorting & clipping: weak power supply?
  182. Broken bias resistors (Yaqin MC-10L)
  183. Tube Enclosure suggestion from Europe.
  184. Benefit/SQ of tube stage at the input of ss power amp
  185. Is 6907 and QQV03-20A tubes are same?
  186. Found some chokes
  187. 6SN7 at low plate currents
  188. 12AU7, 12BH7, Darker Less Bright Option
  189. Heater current effects
  190. Not using all the sections on multi-section cap
  191. DC heater supply dies on me
  192. 1972 Leak Varislope 2 Stereo
  193. OPT secondary ground, stacked supplies
  194. OTL for HeaPhone
  195. Voltage doubler and filament supply
  196. Please suggest me a 6V6 class AB amp
  197. Need Review of wiring up of this SRPP 6AS7 tube amp
  198. Hum in a triode 1H6G...help !
  199. 40w Class A PP KT66?
  200. My new small amp EL84 SE Triode
  201. tube preamp output impedance
  202. pete millet 807 amp
  203. Lost Negative Bias-Fixed Bias
  204. Aikido ('dead quiet') output impedance
  205. Looking for lineamp buffer schematics
  206. Nagra VPA 845
  207. How to match 6C45?
  208. Yet another question about cathode bias (led+pnp)
  209. Ideal System for 1960?
  210. What replaces an IN541 diode?
  211. Bottlehead Eros or Tube4Hifi PH16
  212. Psvane 2a3 T Mk II reliable vender
  213. Odd Wima cap markings
  214. Chinese Amp kit experience
  215. Considerations about headph. OCL
  216. Trying to solve a Plate Follower Problem
  217. Nichicon Caps
  218. Footprint Noval ECC83 Altium
  219. Interference in hybrid amp
  220. wiring DHT filaments with center tapped secondaries
  221. B+ of Curcio Daniel II
  222. Stepped Attenuators Questions
  223. Noisy Ground? (Probably not a loop)
  224. New Production Telefunken
  225. Tube horizontal mounting position
  226. "Ask Jan First" parts website in Germany
  227. EZ215 Stereo 5881 Amp Project
  228. CCS help dn2540 send 340v to the chassis
  229. That's What She Said RH84 Build Log
  230. Help figuring out this output transformer.
  231. 5881 PPP Cathode Bias B+
  232. Measuring DHT filament V with minimal effect.
  233. 100hz hum with Audio Research vs-55
  234. Volume potentiometer
  235. Driver for 2A3C
  236. Regulated B+ sounds worse?
  237. Sylvania console amp rebuild...
  238. E130L Micron
  239. Question Re: Ground Loop Breakers
  240. Source for D3A/7721?
  241. ID a salvaged choke
  242. Magnetwire gauge size converted to metric
  243. ccs what is the best way
  244. parafeed test/measurement setup question.
  245. how do balance pots work?
  246. Issue with parafeed in SPICE
  247. GU-50 Dissected
  248. Need help on ground wiring for Scott 222-B
  249. Heathkit A9-C Mod
  250. Need a 240v, 5vac - 6-10A rectifier transformer

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