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  1. 100hz hum with Audio Research vs-55
  2. Volume potentiometer
  3. Driver for 2A3C
  4. Regulated B+ sounds worse?
  5. Sylvania console amp rebuild...
  6. E130L Micron
  7. Question Re: Ground Loop Breakers
  8. Source for D3A/7721?
  9. ID a salvaged choke
  10. Magnetwire gauge size converted to metric
  11. ccs what is the best way
  12. parafeed test/measurement setup question.
  13. how do balance pots work?
  14. Issue with parafeed in SPICE
  15. GU-50 Dissected
  16. Need help on ground wiring for Scott 222-B
  17. Heathkit A9-C Mod
  18. Need a 240v, 5vac - 6-10A rectifier transformer
  19. Free Canadian Westinghouse Receiver #101: Super Heterodyne
  20. 6AS7 SET amp discussion from Photo Gallery
  21. DHT 100hz hum
  22. HP 8903B and Pete Millett's Software Problem ?
  23. How to identify an ARC D70 version ?
  24. Valve amp first build - questions
  25. Transfrmer Impedance Question
  26. Disappointing results from RH84
  27. Anyone Loose a Counterpoint SA-5000?
  28. Installing a 610 in to a B&K 500
  29. My first tube preamp (4S)....
  30. Recycling old iron with stiff wires.
  31. 6EM7 as driver... help !!!
  32. changing R1 value in SE amp
  33. Heater CCS makes for low voltage
  34. DHT & Indirect on same line?
  35. Which tube preamplifier kit for LM3886 amplifier?
  36. budgie pre-amp
  37. ecl82 class A pp, need schematic
  38. Input low pass preferred method
  39. cary SLP50A
  40. se output options for single/balanced tda1541
  41. FM noise in Fisher 90-T in FM mode
  42. ST Triodes?
  43. TUBECAD SE.
  44. RH84 build with SS recto and voltage doubler (any input?)
  45. Tube identification
  46. Brand new cap overheating - argh
  47. High Power Valves
  48. Tubelab SSE B+ and cathode resistor questions
  49. HIFI world 6080 se
  50. EF86 triode question
  51. Connecting a Headphone Jack to a Preamp
  52. PSE 300B "French connexion"
  53. Making a custom tube characteristic graph
  54. 300B DRD power supply
  55. Insanely High Common Mode Voltage Shunt Measurement
  56. Heathkit AA-151 troubles
  57. Tube Power supply question...
  58. Noob question on power transformer primary input voltage
  59. Dynaco ST35 testing for a blown power transformer
  60. 6n6p tube buffer
  61. Welborne Labs
  62. GU-50 triode
  63. Help track down noise in gyrator
  64. Earphone Amp Improvements
  65. Protecting Wire
  66. 45 SET : tubelab vs get*set*go vs ?
  67. 6SL7 in Maggy 175 amp...
  68. Heater soft start for series-connected preamp valves
  69. low/no gain follower
  70. Data for 6BD2A or 6BD2
  71. isolation test
  72. Western Electric 437A preamp
  73. solid-state rectrification
  74. Class AB
  75. push-pull
  76. Need help ID tango-lookalike transformers
  77. TV Valves blast from the past..
  78. Tubes suggestions for parafeed headphones amp ?
  79. CCS Loadline
  80. Universal pover supply for ECC85 EL84
  81. Conversion Project
  82. Dynaco PAS I/O PCB Grounding
  83. CCS for anode load
  84. OTL Power Supply: Halfwave vs Virtual Ground
  85. Can NOS tubes have emission staining on the glass?
  86. Pentode pre/compressor (warning nube attempt at circuit drafting) --suppressor grid
  87. Capacitor Drain for Tube Bench Power Supply ?
  88. Diodes, diodes, diodes...
  89. Grid leak resistors and dc-coupling
  90. Output transformer at speaker?
  91. Newbie just wondering if this PP amp looks ok
  92. 6P36S push pull HiFi amp
  93. Another Output Transformer Wiring Question
  94. Cathode bias for EL84 PPP
  95. Output Transformer Wiring Question
  96. NJ7P Tube Database
  97. solving my old radiogram sound issues - help
  98. 6H9c Idle Current.
  99. 12E1 SE amp suggestions.
  100. Direct Coupled Output Stage, DC Bias Balance
  101. Pre-amp tube suggestions for 2A3 output tube
  102. AirTight ATM-1 Schematic
  103. Counterpoint SA 5000 Service manual and PSU
  104. Rectifier tube ? - Berman 76 preamp
  105. Cathode feedback (SE amp)
  106. Will anybody interest in stamp size ccs module?
  107. Fairchild voltage questions
  108. Help with a Sylvania 7695 Project
  109. Flicker Noise dominates triode noise in audio (AES)
  110. A tube for SE with 1k-1k5 load
  111. scott stereomaster 233 restoration
  112. Homebrew Dynaco MkIII Problems - PLEASE HELP!
  113. What to do with C3g tubes
  114. Can anyone ID an output transformer's part number?
  115. Nestorovic NA-1 & Alpha-1 Schematics
  116. Data for 6BD2
  117. Ken Shindo R.I.P
  118. HiFi 6n9p EL34 B + 5z3p Class A Tube valve amplifier
  119. Seas Trym with SE KT88 amplifier?
  120. 845-Amp-IT-Coupled
  121. Data for 6RA3
  122. Miniwatt N3 not turning on!
  123. I need ideas on a can capacitor
  124. Help with tube for power supply...
  125. AVC vs TVC for 10y line preamp
  126. help needed with Lumley 120 monoblocks + Sonus Fabre speakers
  127. help on 845 amp
  128. High voltage power tube question
  129. Tribute OPT for PSE 300B
  130. Floating Paraphase.
  131. 6Q7G as driver in RH807
  132. Custom tubes4hifi m-125 monoblocks
  133. Antique Audio Preamlifier made in USA
  134. directly heated tube rectifiers
  135. Biasing a 12EA6 low voltage pentode
  136. Power supply doubt
  137. Vinyl Savor's Octal 6GL7 preamp?
  138. 837 tube
  139. Tone control bypass (Kontakt KT-7)
  140. drdwers
  141. Amplifier Sensitivity?
  142. identify nickel laminations
  143. Recapping Vintage EL84 amp
  144. opinion on dynaco mark VI
  145. How can i have 450 Volts ?
  146. Balanced Preamp
  147. ecc99-300b
  148. Question about the tube specs/testing?
  149. Transformer Winding Configuration, Hafler 2,815,402
  150. PSU with SS Choke for Loftin-White 2a3.
  151. HP 8903 Pete Millet's Software on Window 8 ?
  152. Cathode Destruction
  153. Earth SuperBass B-2000 bass head info needed
  154. More radio shack dissapointment
  155. What to do with transformer secondary when used as a choke?
  156. Slight transformer buzzing in Engineers Amp
  157. Couple Gyrator Questions
  158. Shishido/Loftin-White 2A3/45 Extasy..
  159. When is a tube not a Valve?
  160. Relay Recommendataion
  161. 6080 monotriod amplifier
  162. Tetra Sans PS Phono Stage Power Supply
  163. transformer test
  164. Could someone tell me more about the Mesa Boogie Strategy 400?
  165. New OTL headphone project with EC88 and 6080
  166. Philips Tube Code
  167. Edcor GXPP vs. CXPP
  168. Shorting or Non-Shorting Rotary Switch: Hi-Low Z tube headphone amp
  169. Marshall Guitar Conversion 12AX7 Replacement
  170. affordable potted power transformer?
  171. Am I pushing the envelope too far? Layout concerns.
  172. Pete Millet's Uniamp
  173. 6211 for???
  174. Picking an output transformer: power vs. sound quality
  175. Tube emulation with transistors
  176. Altec 1570b Tube Swap
  177. Popping stepped attenuator
  178. 6922 driver/cathodyne - direct coupled
  179. Solid state rectifier with these tubes
  180. Need advice -- Improving an old tube amp
  181. KT88 SE developed a buzz
  182. Guidance on amp design
  183. OTL3 Autograph Series
  184. DAC Tube i/v help!
  185. Need help figuring out a tube amp!
  186. Parallel 12AT7 output stage design?
  187. 6SN7 SRPP
  188. Problem Bi-Amping
  189. Amplifier recommendation
  190. DIY tube amplifier got no sound but all tubes are fired up.
  191. Circuit for Melos 333
  192. DHT Tube regulated power supply
  193. Akai M8 Restoration, newbie questions
  194. Bench Power Supply - what to get?
  195. Telefunken RS241 Design Help
  196. Telefunken Hymnus 5328 MX console
  197. Some Dummy DHT Questions
  198. Inductance loading tube stage questions
  199. Simple tube kit for tube sound ?
  200. Voltage Divider with Capacitor Across Resistor to Ground
  201. FM Demodulator for Tube receivers
  202. The best amp to DIY?
  203. SE Tubelab / EL34b tubes / Transformers
  204. Heath Kit Pre Amp
  205. Preamp hiss noise
  206. Tube preamp?
  207. 417a load line
  208. 6N1 + 6P3P build, need some help.
  209. Caps connected in series in Audio Note kit 4
  210. Ground loop cure?
  211. Dynaco ST-70 Clone
  212. Op Amp Phase Splitter
  213. Idea for ECC85 or EM84?
  214. Why no sound?
  215. single ended tube amp sounds itself
  216. Proper Pentode Usage 717A (713A)
  217. Help with Mullard 5 20 project
  218. Help on Negative Feedback in KT66 PP
  219. Trying to understand 6BM8 regulator (audio note clone)
  220. 6AS7 headphone amp with Sophia Electric Mesh plate 274B rec. tube
  221. CR Kalypso Amp with output stage problem- Please help!
  222. "PEAK INPUT SIGNAL GRID-TO-GRID" question.
  223. EZ81 Load
  224. Rectifier question
  225. 6sn7-300b
  226. Balanced tube phono stage
  227. Your favorite 12B4A for a preamp ?
  228. Voltage rating for output coupling caps in 6J1 tube buffer?
  229. Single stage 845 amp
  230. Eagle tube library
  231. Using Choke in Choke Input Power Supply ?
  232. 6550 wrong high bias...
  233. Floating Bridged CCS Loaded P-P Tube Amp
  234. What to do with a problem Counterpoint SA-12
  235. 6Z9P Mu Stage max anode-cathode voltage
  236. Audio Innovations Series 500 parts
  237. Hagerman Trumpet phonostage
  238. PS design...success or failure?
  239. Kuba Serenade Stereo Console - Part III - Replacing all caps
  240. schematic of Knight KP-70 preamp or anyone having this amp?
  241. 6N6P Cathode Follower design value
  242. Radiotron 32W PP amp from RDH3
  243. Heater filament questions
  244. 46 in ultralinear mode
  245. help needed need transformer prim 230/110 sec 300v appr. 20ma +6,3v or 12,6v
  246. Output transformer confusion
  247. need amp schematic help
  248. reviving an old Randall RGT100
  249. lm317 and heater supply.
  250. BJT Voltage Bootstrap - SLCF

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