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  1. Extraordinary harmonics. Type 47 # tube amp.
  2. Made a new tube amp, 6J5 +27 +45
  3. Anyone ever play around with a GU-72?
  4. Possibility of using a UTC LMI-500 transformer...
  5. Aikido transformer
  6. Can someone explain why you need to re-adjust the balance on a tube amp every time
  7. Which factory made these tubes ?
  8. 813 and gm70
  9. 13E1 Push Pull
  10. dump find.
  11. ...6SN7GT operating points tube help.......
  12. 6L6 6SJ7 Amp please pick faults if any
  13. Updated DIY EL34B 6SJ7 SE Amp
  14. 6C18 x 6C33
  15. Vintage tube amp find
  16. any benefit to screen-grid drive a 6V6?
  17. Brown face Scott LK72
  18. Pilot 1060 integrated - make it better!
  19. Should I ground my K12G or my Bugle 2?
  20. 6c33 amp convert to 6c41
  21. STA-LEVEL thumbs problem
  22. Amp motorboating at power up
  23. Spice models for AL4 and RS242 tubes
  24. Mains Switch
  25. Suggestions for big output stage needed
  26. Very Good (or best?) 12B4 schematic?
  27. Amplifier for active bookshelf speakers
  28. Olson AM-240 schematic needed
  29. Valve amp - maintenance
  30. Your opinion about Rotel 930AX to hyrbid mod
  31. Weston Tube Tester 774-5
  32. Tube circuit sim software for free?
  33. 6v6 family tubes
  34. Troublesome bias resistor, cathodyne stage
  35. 6AQ5 excellent for line stage?
  36. Datasheet 6P42s and 6P45C
  37. Quad / Cyrus impedance matching
  38. Zobel network at primary audio trafo?
  39. ECL86 question
  40. 500c buzzing power transformer
  41. LM4702+6L6GB/807
  42. TubeAudio Mixer Blog
  43. Finally started on my 6L6 amp. Need tube suggestions.
  44. Just another Scott thread
  45. Design for overdriven output stage
  46. Seeking Articals On Audio Transformer Design & Construction.
  47. Bias el34 pp
  48. Photo Gallery.
  49. Precision S35
  50. 6L6WGB
  51. 6BQ7A Driver
  52. Advise for Simpson 340 signal generator problem
  53. Armaco TTHF or Calrad AP 15 What to do What to do?...
  54. Screen Power and Warmup
  55. Wanting copies of Prof. Alexander Bereskin's transformer winding pictures.
  56. what's the brand of this capacitor sounds great ?
  57. Edcor CXSE25-8-3.2K or Transcendar TT-017-OT?
  58. PP 2A3 Fixed Bias
  59. RL12P35 convert to el34
  60. Statistical regulator from VA 4rd edition
  61. Matching Impedances (the Math behind it) Please Advise if you have a grasp. Xfmrs etc
  62. Help 6AQ5 pushpull
  63. HV Logic Control Approach
  64. Valve heater question
  65. Phase inverter adjustment - Fisher 80AZ
  66. Repurposing a Bogen CHB-35A
  67. SMPS
  68. Interstage and bias failure
  69. Grid 2 current for GU19-1
  70. 6x5 tube
  71. IT coupled 6BG6GA
  72. Mystery noise has got me baffled
  73. Dynaco PAS: too much liposuction?
  74. LP Tape Noise
  75. YAKOV ARONOV MA-100
  76. Help for balance-tone control-mode selector bypass
  77. Opinions please: seeking a first class DIY SET amp design
  78. PSU for 6N6P
  79. HOT B+ capacitors!
  80. Analog meter monitoring HT supply
  81. Lamm LL2.1 DC Offset problem
  82. 6L6GT/6SJ7 Valve Amp DIY
  83. BHExchange for BottleHead's
  84. 6BY5GA elevated heater question
  85. Tone controls
  86. EL84 "IP" questions
  87. KIT Single ended KT88
  88. HELP needed - LEAK Varislope 2 Stereo + Stereo 20 with pictures...
  89. All tube cap tube amp?
  90. 12AX7 preamp for DAC
  91. Grid resistors -> GND
  92. OTL headphone amp distorting & clipping: weak power supply?
  93. Broken bias resistors (Yaqin MC-10L)
  94. Tube Enclosure suggestion from Europe.
  95. Benefit/SQ of tube stage at the input of ss power amp
  96. Is 6907 and QQV03-20A tubes are same?
  97. Found some chokes
  98. 6SN7 at low plate currents
  99. 12AU7, 12BH7, Darker Less Bright Option
  100. Heater current effects
  101. Not using all the sections on multi-section cap
  102. DC heater supply dies on me
  103. 1972 Leak Varislope 2 Stereo
  104. OPT secondary ground, stacked supplies
  105. OTL for HeaPhone
  106. Voltage doubler and filament supply
  107. Please suggest me a 6V6 class AB amp
  108. Need Review of wiring up of this SRPP 6AS7 tube amp
  109. Hum in a triode 1H6G...help !
  110. 40w Class A PP KT66?
  111. My new small amp EL84 SE Triode
  112. tube preamp output impedance
  113. pete millet 807 amp
  114. Lost Negative Bias-Fixed Bias
  115. Aikido ('dead quiet') output impedance
  116. Looking for lineamp buffer schematics
  117. Nagra VPA 845
  118. How to match 6C45?
  119. Yet another question about cathode bias (led+pnp)
  120. Ideal System for 1960?
  121. What replaces an IN541 diode?
  122. Bottlehead Eros or Tube4Hifi PH16
  123. Psvane 2a3 T Mk II reliable vender
  124. Odd Wima cap markings
  125. Chinese Amp kit experience
  126. Considerations about headph. OCL
  127. Trying to solve a Plate Follower Problem
  128. Nichicon Caps
  129. Footprint Noval ECC83 Altium
  130. Interference in hybrid amp
  131. wiring DHT filaments with center tapped secondaries
  132. B+ of Curcio Daniel II
  133. Stepped Attenuators Questions
  134. Noisy Ground? (Probably not a loop)
  135. New Production Telefunken
  136. Tube horizontal mounting position
  137. "Ask Jan First" parts website in Germany
  138. EZ215 Stereo 5881 Amp Project
  139. CCS help dn2540 send 340v to the chassis
  140. That's What She Said RH84 Build Log
  141. Help figuring out this output transformer.
  142. 5881 PPP Cathode Bias B+
  143. Measuring DHT filament V with minimal effect.
  144. 100hz hum with Audio Research vs-55
  145. Volume potentiometer
  146. Driver for 2A3C
  147. Regulated B+ sounds worse?
  148. Sylvania console amp rebuild...
  149. E130L Micron
  150. Question Re: Ground Loop Breakers
  151. Source for D3A/7721?
  152. ID a salvaged choke
  153. Magnetwire gauge size converted to metric
  154. ccs what is the best way
  155. parafeed test/measurement setup question.
  156. how do balance pots work?
  157. Issue with parafeed in SPICE
  158. GU-50 Dissected
  159. Need help on ground wiring for Scott 222-B
  160. Heathkit A9-C Mod
  161. Need a 240v, 5vac - 6-10A rectifier transformer
  162. Free Canadian Westinghouse Receiver #101: Super Heterodyne
  163. 6AS7 SET amp discussion from Photo Gallery
  164. DHT 100hz hum
  165. HP 8903B and Pete Millett's Software Problem ?
  166. How to identify an ARC D70 version ?
  167. Valve amp first build - questions
  168. Transfrmer Impedance Question
  169. Disappointing results from RH84
  170. Anyone Loose a Counterpoint SA-5000?
  171. Installing a 610 in to a B&K 500
  172. My first tube preamp (4S)....
  173. Recycling old iron with stiff wires.
  174. 6EM7 as driver... help !!!
  175. changing R1 value in SE amp
  176. Heater CCS makes for low voltage
  177. DHT & Indirect on same line?
  178. Which tube preamplifier kit for LM3886 amplifier?
  179. budgie pre-amp
  180. ecl82 class A pp, need schematic
  181. Input low pass preferred method
  182. cary SLP50A
  183. se output options for single/balanced tda1541
  184. FM noise in Fisher 90-T in FM mode
  185. ST Triodes?
  186. TUBECAD SE.
  187. RH84 build with SS recto and voltage doubler (any input?)
  188. Tube identification
  189. Brand new cap overheating - argh
  190. High Power Valves
  191. Tubelab SSE B+ and cathode resistor questions
  192. HIFI world 6080 se
  193. EF86 triode question
  194. Connecting a Headphone Jack to a Preamp
  195. PSE 300B "French connexion"
  196. Making a custom tube characteristic graph
  197. 300B DRD power supply
  198. Insanely High Common Mode Voltage Shunt Measurement
  199. Heathkit AA-151 troubles
  200. Tube Power supply question...
  201. Noob question on power transformer primary input voltage
  202. Dynaco ST35 testing for a blown power transformer
  203. 6n6p tube buffer
  204. Welborne Labs
  205. GU-50 triode
  206. Help track down noise in gyrator
  207. Earphone Amp Improvements
  208. Protecting Wire
  209. 45 SET : tubelab vs get*set*go vs ?
  210. 6SL7 in Maggy 175 amp...
  211. Heater soft start for series-connected preamp valves
  212. low/no gain follower
  213. Data for 6BD2A or 6BD2
  214. isolation test
  215. Western Electric 437A preamp
  216. solid-state rectrification
  217. Class AB
  218. push-pull
  219. Need help ID tango-lookalike transformers
  220. TV Valves blast from the past..
  221. Tubes suggestions for parafeed headphones amp ?
  222. CCS Loadline
  223. Universal pover supply for ECC85 EL84
  224. Conversion Project
  225. Dynaco PAS I/O PCB Grounding
  226. CCS for anode load
  227. OTL Power Supply: Halfwave vs Virtual Ground
  228. Can NOS tubes have emission staining on the glass?
  229. Pentode pre/compressor (warning nube attempt at circuit drafting) --suppressor grid
  230. Capacitor Drain for Tube Bench Power Supply ?
  231. Diodes, diodes, diodes...
  232. Grid leak resistors and dc-coupling
  233. Output transformer at speaker?
  234. Newbie just wondering if this PP amp looks ok
  235. 6P36S push pull HiFi amp
  236. Another Output Transformer Wiring Question
  237. Cathode bias for EL84 PPP
  238. Output Transformer Wiring Question
  239. NJ7P Tube Database
  240. solving my old radiogram sound issues - help
  241. 6H9c Idle Current.
  242. 12E1 SE amp suggestions.
  243. Direct Coupled Output Stage, DC Bias Balance
  244. Pre-amp tube suggestions for 2A3 output tube
  245. AirTight ATM-1 Schematic
  246. Counterpoint SA 5000 Service manual and PSU
  247. Rectifier tube ? - Berman 76 preamp
  248. Cathode feedback (SE amp)
  249. Will anybody interest in stamp size ccs module?
  250. Fairchild voltage questions

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