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  1. Voltage doubler and filament supply
  2. Please suggest me a 6V6 class AB amp
  3. Need Review of wiring up of this SRPP 6AS7 tube amp
  4. Hum in a triode 1H6G...help !
  5. 40w Class A PP KT66?
  6. My new small amp EL84 SE Triode
  7. tube preamp output impedance
  8. pete millet 807 amp
  9. Lost Negative Bias-Fixed Bias
  10. Aikido ('dead quiet') output impedance
  11. Looking for lineamp buffer schematics
  12. Nagra VPA 845
  13. How to match 6C45?
  14. Yet another question about cathode bias (led+pnp)
  15. What replaces an IN541 diode?
  16. Bottlehead Eros or Tube4Hifi PH16
  17. Psvane 2a3 T Mk II reliable vender
  18. Odd Wima cap markings
  19. Chinese Amp kit experience
  20. Considerations about headph. OCL
  21. Trying to solve a Plate Follower Problem
  22. Footprint Noval ECC83 Altium
  23. Interference in hybrid amp
  24. wiring DHT filaments with center tapped secondaries
  25. B+ of Curcio Daniel II
  26. Stepped Attenuators Questions
  27. Noisy Ground? (Probably not a loop)
  28. New Production Telefunken
  29. Tube horizontal mounting position
  30. "Ask Jan First" parts website in Germany
  31. EZ215 Stereo 5881 Amp Project
  32. CCS help dn2540 send 340v to the chassis
  33. That's What She Said RH84 Build Log
  34. Help figuring out this output transformer.
  35. 5881 PPP Cathode Bias B+
  36. Measuring DHT filament V with minimal effect.
  37. 100hz hum with Audio Research vs-55
  38. Volume potentiometer
  39. Driver for 2A3C
  40. Regulated B+ sounds worse?
  41. Sylvania console amp rebuild...
  42. E130L Micron
  43. Question Re: Ground Loop Breakers
  44. Source for D3A/7721?
  45. ID a salvaged choke
  46. Magnetwire gauge size converted to metric
  47. ccs what is the best way
  48. parafeed test/measurement setup question.
  49. how do balance pots work?
  50. Issue with parafeed in SPICE
  51. GU-50 Dissected
  52. Need help on ground wiring for Scott 222-B
  53. Heathkit A9-C Mod
  54. Need a 240v, 5vac - 6-10A rectifier transformer
  55. Free Canadian Westinghouse Receiver #101: Super Heterodyne
  56. 6AS7 SET amp discussion from Photo Gallery
  57. DHT 100hz hum
  58. HP 8903B and Pete Millett's Software Problem ?
  59. How to identify an ARC D70 version ?
  60. Valve amp first build - questions
  61. Transfrmer Impedance Question
  62. Disappointing results from RH84
  63. Anyone Loose a Counterpoint SA-5000?
  64. Installing a 610 in to a B&K 500
  65. My first tube preamp (4S)....
  66. Recycling old iron with stiff wires.
  67. 6EM7 as driver... help !!!
  68. changing R1 value in SE amp
  69. Heater CCS makes for low voltage
  70. DHT & Indirect on same line?
  71. Which tube preamplifier kit for LM3886 amplifier?
  72. budgie pre-amp
  73. ecl82 class A pp, need schematic
  74. Input low pass preferred method
  75. cary SLP50A
  76. se output options for single/balanced tda1541
  77. FM noise in Fisher 90-T in FM mode
  78. ST Triodes?
  79. TUBECAD SE.
  80. RH84 build with SS recto and voltage doubler (any input?)
  81. Tube identification
  82. Brand new cap overheating - argh
  83. High Power Valves
  84. HIFI world 6080 se
  85. EF86 triode question
  86. Connecting a Headphone Jack to a Preamp
  87. PSE 300B "French connexion"
  88. Making a custom tube characteristic graph
  89. 300B DRD power supply
  90. Insanely High Common Mode Voltage Shunt Measurement
  91. Heathkit AA-151 troubles
  92. Tube Power supply question...
  93. Noob question on power transformer primary input voltage
  94. Dynaco ST35 testing for a blown power transformer
  95. 6n6p tube buffer
  96. Welborne Labs
  97. GU-50 triode
  98. Help track down noise in gyrator
  99. Earphone Amp Improvements
  100. Protecting Wire
  101. 45 SET : tubelab vs get*set*go vs ?
  102. 6SL7 in Maggy 175 amp...
  103. Heater soft start for series-connected preamp valves
  104. low/no gain follower
  105. Data for 6BD2A or 6BD2
  106. isolation test
  107. Western Electric 437A preamp
  108. solid-state rectrification
  109. Class AB
  110. push-pull
  111. Need help ID tango-lookalike transformers
  112. TV Valves blast from the past..
  113. Tubes suggestions for parafeed headphones amp ?
  114. CCS Loadline
  115. Universal power supply for ECC85 EL84
  116. Conversion Project
  117. Dynaco PAS I/O PCB Grounding
  118. CCS for anode load
  119. OTL Power Supply: Halfwave vs Virtual Ground
  120. Can NOS tubes have emission staining on the glass?
  121. Pentode pre/compressor (warning nube attempt at circuit drafting) --suppressor grid
  122. Capacitor Drain for Tube Bench Power Supply ?
  123. Grid leak resistors and dc-coupling
  124. Output transformer at speaker?
  125. Newbie just wondering if this PP amp looks ok
  126. 6P36S push pull HiFi amp
  127. Another Output Transformer Wiring Question
  128. Cathode bias for EL84 PPP
  129. Output Transformer Wiring Question
  130. NJ7P Tube Database
  131. solving my old radiogram sound issues - help
  132. 6H9c Idle Current.
  133. 12E1 SE amp suggestions.
  134. Direct Coupled Output Stage, DC Bias Balance
  135. Pre-amp tube suggestions for 2A3 output tube
  136. AirTight ATM-1 Schematic
  137. Counterpoint SA 5000 Service manual and PSU
  138. Rectifier tube ? - Berman 76 preamp
  139. Cathode feedback (SE amp)
  140. Will anybody interest in stamp size ccs module?
  141. Fairchild voltage questions
  142. Help with a Sylvania 7695 Project
  143. Flicker Noise dominates triode noise in audio (AES)
  144. A tube for SE with 1k-1k5 load
  145. scott stereomaster 233 restoration
  146. Homebrew Dynaco MkIII Problems - PLEASE HELP!
  147. What to do with C3g tubes
  148. Can anyone ID an output transformer's part number?
  149. Nestorovic NA-1 & Alpha-1 Schematics
  150. Data for 6BD2
  151. Ken Shindo R.I.P
  152. HiFi 6n9p EL34 B + 5z3p Class A Tube valve amplifier
  153. Seas Trym with SE KT88 amplifier?
  154. 845-Amp-IT-Coupled
  155. Data for 6RA3
  156. Miniwatt N3 not turning on!
  157. Help with tube for power supply...
  158. AVC vs TVC for 10y line preamp
  159. help needed with Lumley 120 monoblocks + Sonus Fabre speakers
  160. help on 845 amp
  161. High voltage power tube question
  162. Tribute OPT for PSE 300B
  163. Floating Paraphase.
  164. 6Q7G as driver in RH807
  165. Custom tubes4hifi m-125 monoblocks
  166. Antique Audio Preamlifier made in USA
  167. directly heated tube rectifiers
  168. Biasing a 12EA6 low voltage pentode
  169. Power supply doubt
  170. Vinyl Savor's Octal 6GL7 preamp?
  171. 837 tube
  172. Tone control bypass (Kontakt KT-7)
  173. drdwers
  174. Amplifier Sensitivity?
  175. identify nickel laminations
  176. Recapping Vintage EL84 amp
  177. Luxman Active 3-way Tube Crossover
  178. opinion on dynaco mark VI
  179. How can i have 450 Volts ?
  180. Balanced Preamp
  181. ecc99-300b
  182. Question about the tube specs/testing?
  183. Transformer Winding Configuration, Hafler 2,815,402
  184. PSU with Choke for Loftin-White 2A3
  185. HP 8903 Pete Millet's Software on Window 8 ?
  186. Cathode Destruction
  187. More radio shack dissapointment
  188. What to do with transformer secondary when used as a choke?
  189. Slight transformer buzzing in Engineers Amp
  190. Couple Gyrator Questions
  191. Shishido/Loftin-White 2A3/45 Extasy..
  192. When is a tube not a Valve?
  193. Relay Recommendataion
  194. 6080 SE triode amplifier
  195. Tetra Sans PS Phono Stage Power Supply
  196. transformer test
  197. New OTL headphone project with EC88 and 6080
  198. Philips Tube Code
  199. Edcor GXPP vs. CXPP
  200. Shorting or Non-Shorting Rotary Switch: Hi-Low Z tube headphone amp
  201. affordable potted power transformer?
  202. Am I pushing the envelope too far? Layout concerns.
  203. Pete Millet's Uniamp
  204. 6211 for???
  205. Picking an output transformer: power vs. sound quality
  206. Tube emulation with transistors
  207. Altec 1570b Tube Swap
  208. Popping stepped attenuator
  209. 6922 driver/cathodyne - direct coupled
  210. Solid state rectifier with these tubes
  211. Need advice -- Improving an old tube amp
  212. KT88 SE developed a buzz
  213. Guidance on amp design
  214. OTL3 Autograph Series
  215. DAC Tube i/v help!
  216. Need help figuring out a tube amp!
  217. Parallel 12AT7 output stage design?
  218. 6SN7 SRPP
  219. Problem Bi-Amping
  220. Amplifier recommendation
  221. DIY tube amplifier got no sound but all tubes are fired up.
  222. Circuit for Melos 333
  223. DHT Tube regulated power supply
  224. Akai M8 Restoration, newbie questions
  225. Bench Power Supply - what to get?
  226. Telefunken RS241 Design Help
  227. Telefunken Hymnus 5328 MX console
  228. Some Dummy DHT Questions
  229. Inductance loading tube stage questions
  230. Simple tube kit for tube sound ?
  231. Voltage Divider with Capacitor Across Resistor to Ground
  232. FM Demodulator for Tube receivers
  233. The best amp to DIY?
  234. Heath Kit Pre Amp
  235. Preamp hiss noise
  236. Tube preamp?
  237. 417a load line
  238. 6N1 + 6P3P build, need some help.
  239. Caps connected in series in Audio Note kit 4
  240. Ground loop cure?
  241. Dynaco ST-70 Clone
  242. Op Amp Phase Splitter
  243. Idea for ECC85 or EM84?
  244. Why no sound?
  245. single ended tube amp sounds itself
  246. Proper Pentode Usage 717A (713A)
  247. Help with Mullard 5 20 project
  248. Help on Negative Feedback in KT66 PP
  249. Trying to understand 6BM8 regulator (audio note clone)
  250. 6AS7 headphone amp with Sophia Electric Mesh plate 274B rec. tube

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