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  1. Anyone ever play around with a GU-72?
  2. Possibility of using a UTC LMI-500 transformer...
  3. Aikido transformer
  4. Can someone explain why you need to re-adjust the balance on a tube amp every time
  5. Which factory made these tubes ?
  6. 813 and gm70
  7. 13E1 Push Pull
  8. dump find.
  9. ...6SN7GT operating points tube help.......
  10. 6L6 6SJ7 Amp please pick faults if any
  11. Updated DIY EL34B 6SJ7 SE Amp
  12. 6C18 x 6C33
  13. Vintage tube amp find
  14. any benefit to screen-grid drive a 6V6?
  15. Brown face Scott LK72
  16. Pilot 1060 integrated - make it better!
  17. Should I ground my K12G or my Bugle 2?
  18. 6c33 amp convert to 6c41
  19. STA-LEVEL thumbs problem
  20. Amp motorboating at power up
  21. Spice models for AL4 and RS242 tubes
  22. Mains Switch
  23. Suggestions for big output stage needed
  24. Very Good (or best?) 12B4 schematic?
  25. Amplifier for active bookshelf speakers
  26. Olson AM-240 schematic needed
  27. Valve amp - maintenance
  28. Your opinion about Rotel 930AX to hyrbid mod
  29. Weston Tube Tester 774-5
  30. Tube circuit sim software for free?
  31. 6v6 family tubes
  32. Troublesome bias resistor, cathodyne stage
  33. 6AQ5 excellent for line stage?
  34. Datasheet 6P42s and 6P45C
  35. Quad / Cyrus impedance matching
  36. Zobel network at primary audio trafo?
  37. ECL86 question
  38. 500c buzzing power transformer
  39. LM4702+6L6GB/807
  40. TubeAudio Mixer Blog
  41. Finally started on my 6L6 amp. Need tube suggestions.
  42. Just another Scott thread
  43. Design for overdriven output stage
  44. Seeking Articals On Audio Transformer Design & Construction.
  45. Bias el34 pp
  46. Photo Gallery.
  47. Precision S35
  48. 6L6WGB
  49. 6BQ7A Driver
  50. Advise for Simpson 340 signal generator problem
  51. Armaco TTHF or Calrad AP 15 What to do What to do?...
  52. Screen Power and Warmup
  53. Wanting copies of Prof. Alexander Bereskin's transformer winding pictures.
  54. Edcor CXSE25-8-3.2K or Transcendar TT-017-OT?
  55. PP 2A3 Fixed Bias
  56. RL12P35 convert to el34
  57. Statistical regulator from VA 4rd edition
  58. Matching Impedances (the Math behind it) Please Advise if you have a grasp. Xfmrs etc
  59. Help 6AQ5 pushpull
  60. HV Logic Control Approach
  61. Valve heater question
  62. Phase inverter adjustment - Fisher 80AZ
  63. Repurposing a Bogen CHB-35A
  64. SMPS
  65. Interstage and bias failure
  66. Grid 2 current for GU19-1
  67. 6x5 tube
  68. IT coupled 6BG6GA
  69. Mystery noise has got me baffled
  70. Dynaco PAS: too much liposuction?
  71. LP Tape Noise
  72. YAKOV ARONOV MA-100
  73. Help for balance-tone control-mode selector bypass
  74. Design of transformers for valve amplifiers
  75. Opinions please: seeking a first class DIY SET amp design
  76. PSU for 6N6P
  77. HOT B+ capacitors!
  78. Analog meter monitoring HT supply
  79. Lamm LL2.1 DC Offset problem
  80. 6L6GT/6SJ7 Valve Amp DIY
  81. BHExchange for BottleHead's
  82. 6BY5GA elevated heater question
  83. Tone controls
  84. EL84 "IP" questions
  85. KIT Single ended KT88
  86. HELP needed - LEAK Varislope 2 Stereo + Stereo 20 with pictures...
  87. All tube cap tube amp?
  88. 12AX7 preamp for DAC
  89. Grid resistors -> GND
  90. OTL headphone amp distorting & clipping: weak power supply?
  91. Broken bias resistors (Yaqin MC-10L)
  92. Tube Enclosure suggestion from Europe.
  93. Benefit/SQ of tube stage at the input of ss power amp
  94. Is 6907 and QQV03-20A tubes are same?
  95. Found some chokes
  96. 6SN7 at low plate currents
  97. 12AU7, 12BH7, Darker Less Bright Option
  98. Heater current effects
  99. Not using all the sections on multi-section cap
  100. DC heater supply dies on me
  101. 1972 Leak Varislope 2 Stereo
  102. OPT secondary ground, stacked supplies
  103. OTL for HeaPhone
  104. Voltage doubler and filament supply
  105. Please suggest me a 6V6 class AB amp
  106. Need Review of wiring up of this SRPP 6AS7 tube amp
  107. Hum in a triode 1H6G...help !
  108. 40w Class A PP KT66?
  109. My new small amp EL84 SE Triode
  110. tube preamp output impedance
  111. pete millet 807 amp
  112. Lost Negative Bias-Fixed Bias
  113. Aikido ('dead quiet') output impedance
  114. Looking for lineamp buffer schematics
  115. Nagra VPA 845
  116. How to match 6C45?
  117. Yet another question about cathode bias (led+pnp)
  118. What replaces an IN541 diode?
  119. Bottlehead Eros or Tube4Hifi PH16
  120. Psvane 2a3 T Mk II reliable vender
  121. Odd Wima cap markings
  122. Chinese Amp kit experience
  123. Considerations about headph. OCL
  124. Trying to solve a Plate Follower Problem
  125. Footprint Noval ECC83 Altium
  126. Interference in hybrid amp
  127. wiring DHT filaments with center tapped secondaries
  128. B+ of Curcio Daniel II
  129. Stepped Attenuators Questions
  130. Noisy Ground? (Probably not a loop)
  131. New Production Telefunken
  132. Tube horizontal mounting position
  133. "Ask Jan First" parts website in Germany
  134. EZ215 Stereo 5881 Amp Project
  135. CCS help dn2540 send 340v to the chassis
  136. That's What She Said RH84 Build Log
  137. Help figuring out this output transformer.
  138. 5881 PPP Cathode Bias B+
  139. Measuring DHT filament V with minimal effect.
  140. 100hz hum with Audio Research vs-55
  141. Volume potentiometer
  142. Driver for 2A3C
  143. Regulated B+ sounds worse?
  144. Sylvania console amp rebuild...
  145. E130L Micron
  146. Question Re: Ground Loop Breakers
  147. Source for D3A/7721?
  148. ID a salvaged choke
  149. Magnetwire gauge size converted to metric
  150. ccs what is the best way
  151. parafeed test/measurement setup question.
  152. how do balance pots work?
  153. Issue with parafeed in SPICE
  154. GU-50 Dissected
  155. Need help on ground wiring for Scott 222-B
  156. Heathkit A9-C Mod
  157. Need a 240v, 5vac - 6-10A rectifier transformer
  158. Free Canadian Westinghouse Receiver #101: Super Heterodyne
  159. 6AS7 SET amp discussion from Photo Gallery
  160. DHT 100hz hum
  161. HP 8903B and Pete Millett's Software Problem ?
  162. How to identify an ARC D70 version ?
  163. Valve amp first build - questions
  164. Transfrmer Impedance Question
  165. Disappointing results from RH84
  166. Anyone Loose a Counterpoint SA-5000?
  167. Installing a 610 in to a B&K 500
  168. My first tube preamp (4S)....
  169. Recycling old iron with stiff wires.
  170. 6EM7 as driver... help !!!
  171. changing R1 value in SE amp
  172. Heater CCS makes for low voltage
  173. DHT & Indirect on same line?
  174. Which tube preamplifier kit for LM3886 amplifier?
  175. budgie pre-amp
  176. ecl82 class A pp, need schematic
  177. Input low pass preferred method
  178. cary SLP50A
  179. se output options for single/balanced tda1541
  180. FM noise in Fisher 90-T in FM mode
  181. ST Triodes?
  182. TUBECAD SE.
  183. RH84 build with SS recto and voltage doubler (any input?)
  184. Tube identification
  185. Brand new cap overheating - argh
  186. High Power Valves
  187. Tubelab SSE B+ and cathode resistor questions
  188. HIFI world 6080 se
  189. EF86 triode question
  190. Connecting a Headphone Jack to a Preamp
  191. PSE 300B "French connexion"
  192. Making a custom tube characteristic graph
  193. 300B DRD power supply
  194. Insanely High Common Mode Voltage Shunt Measurement
  195. Heathkit AA-151 troubles
  196. Tube Power supply question...
  197. Noob question on power transformer primary input voltage
  198. Dynaco ST35 testing for a blown power transformer
  199. 6n6p tube buffer
  200. Welborne Labs
  201. GU-50 triode
  202. Help track down noise in gyrator
  203. Earphone Amp Improvements
  204. Protecting Wire
  205. 45 SET : tubelab vs get*set*go vs ?
  206. 6SL7 in Maggy 175 amp...
  207. Heater soft start for series-connected preamp valves
  208. low/no gain follower
  209. Data for 6BD2A or 6BD2
  210. isolation test
  211. Western Electric 437A preamp
  212. solid-state rectrification
  213. Class AB
  214. push-pull
  215. Need help ID tango-lookalike transformers
  216. TV Valves blast from the past..
  217. Tubes suggestions for parafeed headphones amp ?
  218. CCS Loadline
  219. Universal power supply for ECC85 EL84
  220. Conversion Project
  221. Dynaco PAS I/O PCB Grounding
  222. CCS for anode load
  223. OTL Power Supply: Halfwave vs Virtual Ground
  224. Can NOS tubes have emission staining on the glass?
  225. Pentode pre/compressor (warning nube attempt at circuit drafting) --suppressor grid
  226. Capacitor Drain for Tube Bench Power Supply ?
  227. Diodes, diodes, diodes...
  228. Grid leak resistors and dc-coupling
  229. Output transformer at speaker?
  230. Newbie just wondering if this PP amp looks ok
  231. 6P36S push pull HiFi amp
  232. Another Output Transformer Wiring Question
  233. Cathode bias for EL84 PPP
  234. Output Transformer Wiring Question
  235. NJ7P Tube Database
  236. solving my old radiogram sound issues - help
  237. 6H9c Idle Current.
  238. 12E1 SE amp suggestions.
  239. Direct Coupled Output Stage, DC Bias Balance
  240. Pre-amp tube suggestions for 2A3 output tube
  241. AirTight ATM-1 Schematic
  242. Counterpoint SA 5000 Service manual and PSU
  243. Rectifier tube ? - Berman 76 preamp
  244. Cathode feedback (SE amp)
  245. Will anybody interest in stamp size ccs module?
  246. Fairchild voltage questions
  247. Help with a Sylvania 7695 Project
  248. Flicker Noise dominates triode noise in audio (AES)
  249. A tube for SE with 1k-1k5 load
  250. scott stereomaster 233 restoration

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