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

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