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  1. Choosing an op point when using a tube 'off label'
  2. Choke inputs
  3. Unbalanced In > Balanced Out line amp - How To Do It?
  4. 6146b output transformer. I'm new and I need help.
  5. Your first DiY Low Cost/Low Voltage tube AMP
  6. Need some advice on OPT for kt88/6l6
  7. 1:1:1 transformers
  8. Output transformer in the cathode?
  9. Popping DC
  10. Power transformer wiring issues
  11. easy question - Magnavox 86-01 owners...
  12. Mic preamp input transformer alternative?
  13. What's the Best Way to Reduce Gain in a Preamp
  14. safety with high voltage input capacitor ?
  15. SE EL84 amp - reducing 100Hz hum
  16. Photos of large DHT preamps? (Or large amps in general)
  17. Minimum pin length (noval)
  18. Biasing of KT120
  19. SE to balanced transformer
  20. Decoupling Cap value - How Much?
  21. Cathode bypass Cap vs. No Bypass Cap
  22. Interesting circuit I thought.
  23. Yet another K12G thread
  24. 6N3 tube preamp question
  25. Driver vs Power tube
  26. Help in Bias tube amp for Adis Devy 7
  27. Tubes and HT
  28. HiFiMan EF-2A schematic sought
  29. Please, help with a WE91 project on behalf of a friend
  30. Proposed Headphone Amp Overhaul?
  31. protection of downstream line amp
  32. Is the 6E6P suitable for audio?
  33. me clone proto EL/PL 504
  34. Improving headphone amplifier
  35. 5902 LSTPICE Model
  36. Canary CA-301 PSU
  37. 3B28 oscilator
  38. A lot of schematics
  39. V8 amp
  40. market by Jac music
  41. 6P3C-1 SE ? .
  42. Cary slp70: Worth to upgrade?
  43. Hickok 123B tube tester
  44. Adding NFB makes headphone amp sound AWFUL!!!
  45. Filaments hard wired to B+ on EZ81 base
  46. What the bird is OS 18/600?
  47. ccs 10m90s what is wrong?
  48. Topology for balanced preamp
  49. 6v6 vs. 6l6 vs. 807 soundwise..
  50. Opinions/Advice on Triode Strap method
  51. Something like a Miniwatt N3 or APPJ PA0901A
  52. Extraordinary harmonics. Type 47 # tube amp.
  53. Made a new tube amp, 6J5 +27 +45
  54. Anyone ever play around with a GU-72?
  55. Possibility of using a UTC LMI-500 transformer...
  56. Aikido transformer
  57. Can someone explain why you need to re-adjust the balance on a tube amp every time
  58. Which factory made these tubes ?
  59. 813 and gm70
  60. 13E1 Push Pull
  61. dump find.
  62. ...6SN7GT operating points tube help.......
  63. 6L6 6SJ7 Amp please pick faults if any
  64. Updated DIY EL34B 6SJ7 SE Amp
  65. 6C18 x 6C33
  66. Vintage tube amp find
  67. any benefit to screen-grid drive a 6V6?
  68. Brown face Scott LK72
  69. Pilot 1060 integrated - make it better!
  70. Should I ground my K12G or my Bugle 2?
  71. 6c33 amp convert to 6c41
  72. STA-LEVEL thumbs problem
  73. Amp motorboating at power up
  74. Spice models for AL4 and RS242 tubes
  75. Mains Switch
  76. Suggestions for big output stage needed
  77. Very Good (or best?) 12B4 schematic?
  78. Amplifier for active bookshelf speakers
  79. Olson AM-240 schematic needed
  80. Valve amp - maintenance
  81. Your opinion about Rotel 930AX to hyrbid mod
  82. Weston Tube Tester 774-5
  83. Tube circuit sim software for free?
  84. 6v6 family tubes
  85. Troublesome bias resistor, cathodyne stage
  86. 6AQ5 excellent for line stage?
  87. Datasheet 6P42s and 6P45C
  88. Quad / Cyrus impedance matching
  89. Zobel network at primary audio trafo?
  90. ECL86 question
  91. 500c buzzing power transformer
  92. LM4702+6L6GB/807
  93. TubeAudio Mixer Blog
  94. Finally started on my 6L6 amp. Need tube suggestions.
  95. Just another Scott thread
  96. Design for overdriven output stage
  97. Seeking Articals On Audio Transformer Design & Construction.
  98. Bias el34 pp
  99. Photo Gallery.
  100. Precision S35
  101. 6L6WGB
  102. 6BQ7A Driver
  103. Advise for Simpson 340 signal generator problem
  104. Armaco TTHF or Calrad AP 15 What to do What to do?...
  105. Screen Power and Warmup
  106. Wanting copies of Prof. Alexander Bereskin's transformer winding pictures.
  107. what's the brand of this capacitor sounds great ?
  108. Edcor CXSE25-8-3.2K or Transcendar TT-017-OT?
  109. PP 2A3 Fixed Bias
  110. RL12P35 convert to el34
  111. Statistical regulator from VA 4rd edition
  112. Matching Impedances (the Math behind it) Please Advise if you have a grasp. Xfmrs etc
  113. Help 6AQ5 pushpull
  114. HV Logic Control Approach
  115. Valve heater question
  116. Phase inverter adjustment - Fisher 80AZ
  117. Repurposing a Bogen CHB-35A
  118. SMPS
  119. Interstage and bias failure
  120. Grid 2 current for GU19-1
  121. 6x5 tube
  122. IT coupled 6BG6GA
  123. Mystery noise has got me baffled
  124. Dynaco PAS: too much liposuction?
  125. LP Tape Noise
  126. YAKOV ARONOV MA-100
  127. Help for balance-tone control-mode selector bypass
  128. Design of transformers for valve amplifiers
  129. Opinions please: seeking a first class DIY SET amp design
  130. PSU for 6N6P
  131. HOT B+ capacitors!
  132. Analog meter monitoring HT supply
  133. Lamm LL2.1 DC Offset problem
  134. 6L6GT/6SJ7 Valve Amp DIY
  135. BHExchange for BottleHead's
  136. 6BY5GA elevated heater question
  137. Tone controls
  138. EL84 "IP" questions
  139. KIT Single ended KT88
  140. HELP needed - LEAK Varislope 2 Stereo + Stereo 20 with pictures...
  141. All tube cap tube amp?
  142. 12AX7 preamp for DAC
  143. Grid resistors -> GND
  144. OTL headphone amp distorting & clipping: weak power supply?
  145. Broken bias resistors (Yaqin MC-10L)
  146. Tube Enclosure suggestion from Europe.
  147. Benefit/SQ of tube stage at the input of ss power amp
  148. Is 6907 and QQV03-20A tubes are same?
  149. Found some chokes
  150. 6SN7 at low plate currents
  151. 12AU7, 12BH7, Darker Less Bright Option
  152. Heater current effects
  153. Not using all the sections on multi-section cap
  154. DC heater supply dies on me
  155. 1972 Leak Varislope 2 Stereo
  156. OPT secondary ground, stacked supplies
  157. OTL for HeaPhone
  158. Voltage doubler and filament supply
  159. Please suggest me a 6V6 class AB amp
  160. Need Review of wiring up of this SRPP 6AS7 tube amp
  161. Hum in a triode 1H6G...help !
  162. 40w Class A PP KT66?
  163. My new small amp EL84 SE Triode
  164. tube preamp output impedance
  165. pete millet 807 amp
  166. Lost Negative Bias-Fixed Bias
  167. Aikido ('dead quiet') output impedance
  168. Looking for lineamp buffer schematics
  169. Nagra VPA 845
  170. How to match 6C45?
  171. Yet another question about cathode bias (led+pnp)
  172. Ideal System for 1960?
  173. What replaces an IN541 diode?
  174. Bottlehead Eros or Tube4Hifi PH16
  175. Psvane 2a3 T Mk II reliable vender
  176. Odd Wima cap markings
  177. Chinese Amp kit experience
  178. Considerations about headph. OCL
  179. Trying to solve a Plate Follower Problem
  180. Nichicon Caps
  181. Footprint Noval ECC83 Altium
  182. Interference in hybrid amp
  183. wiring DHT filaments with center tapped secondaries
  184. B+ of Curcio Daniel II
  185. Stepped Attenuators Questions
  186. Noisy Ground? (Probably not a loop)
  187. New Production Telefunken
  188. Tube horizontal mounting position
  189. "Ask Jan First" parts website in Germany
  190. EZ215 Stereo 5881 Amp Project
  191. CCS help dn2540 send 340v to the chassis
  192. That's What She Said RH84 Build Log
  193. Help figuring out this output transformer.
  194. 5881 PPP Cathode Bias B+
  195. Measuring DHT filament V with minimal effect.
  196. 100hz hum with Audio Research vs-55
  197. Volume potentiometer
  198. Driver for 2A3C
  199. Regulated B+ sounds worse?
  200. Sylvania console amp rebuild...
  201. E130L Micron
  202. Question Re: Ground Loop Breakers
  203. Source for D3A/7721?
  204. ID a salvaged choke
  205. Magnetwire gauge size converted to metric
  206. ccs what is the best way
  207. parafeed test/measurement setup question.
  208. how do balance pots work?
  209. Issue with parafeed in SPICE
  210. GU-50 Dissected
  211. Need help on ground wiring for Scott 222-B
  212. Heathkit A9-C Mod
  213. Need a 240v, 5vac - 6-10A rectifier transformer
  214. Free Canadian Westinghouse Receiver #101: Super Heterodyne
  215. 6AS7 SET amp discussion from Photo Gallery
  216. DHT 100hz hum
  217. HP 8903B and Pete Millett's Software Problem ?
  218. How to identify an ARC D70 version ?
  219. Valve amp first build - questions
  220. Transfrmer Impedance Question
  221. Disappointing results from RH84
  222. Anyone Loose a Counterpoint SA-5000?
  223. Installing a 610 in to a B&K 500
  224. My first tube preamp (4S)....
  225. Recycling old iron with stiff wires.
  226. 6EM7 as driver... help !!!
  227. changing R1 value in SE amp
  228. Heater CCS makes for low voltage
  229. DHT & Indirect on same line?
  230. Which tube preamplifier kit for LM3886 amplifier?
  231. budgie pre-amp
  232. ecl82 class A pp, need schematic
  233. Input low pass preferred method
  234. cary SLP50A
  235. se output options for single/balanced tda1541
  236. FM noise in Fisher 90-T in FM mode
  237. ST Triodes?
  238. TUBECAD SE.
  239. RH84 build with SS recto and voltage doubler (any input?)
  240. Tube identification
  241. Brand new cap overheating - argh
  242. High Power Valves
  243. Tubelab SSE B+ and cathode resistor questions
  244. HIFI world 6080 se
  245. EF86 triode question
  246. Connecting a Headphone Jack to a Preamp
  247. PSE 300B "French connexion"
  248. Making a custom tube characteristic graph
  249. 300B DRD power supply
  250. Insanely High Common Mode Voltage Shunt Measurement

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