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  1. 12AU7, 12BH7, Darker Less Bright Option
  2. Heater current effects
  3. Not using all the sections on multi-section cap
  4. DC heater supply dies on me
  5. 1972 Leak Varislope 2 Stereo
  6. OPT secondary ground, stacked supplies
  7. OTL for HeaPhone
  8. Voltage doubler and filament supply
  9. Please suggest me a 6V6 class AB amp
  10. Need Review of wiring up of this SRPP 6AS7 tube amp
  11. Hum in a triode 1H6G...help !
  12. 40w Class A PP KT66?
  13. My new small amp EL84 SE Triode
  14. tube preamp output impedance
  15. pete millet 807 amp
  16. Lost Negative Bias-Fixed Bias
  17. Aikido ('dead quiet') output impedance
  18. Looking for lineamp buffer schematics
  19. Nagra VPA 845
  20. How to match 6C45?
  21. Yet another question about cathode bias (led+pnp)
  22. Ideal System for 1960?
  23. What replaces an IN541 diode?
  24. Bottlehead Eros or Tube4Hifi PH16
  25. Psvane 2a3 T Mk II reliable vender
  26. Odd Wima cap markings
  27. Chinese Amp kit experience
  28. Considerations about headph. OCL
  29. Trying to solve a Plate Follower Problem
  30. Nichicon Caps
  31. Footprint Noval ECC83 Altium
  32. Interference in hybrid amp
  33. wiring DHT filaments with center tapped secondaries
  34. B+ of Curcio Daniel II
  35. Stepped Attenuators Questions
  36. Noisy Ground? (Probably not a loop)
  37. New Production Telefunken
  38. Tube horizontal mounting position
  39. "Ask Jan First" parts website in Germany
  40. EZ215 Stereo 5881 Amp Project
  41. CCS help dn2540 send 340v to the chassis
  42. That's What She Said RH84 Build Log
  43. Help figuring out this output transformer.
  44. 5881 PPP Cathode Bias B+
  45. Measuring DHT filament V with minimal effect.
  46. 100hz hum with Audio Research vs-55
  47. Volume potentiometer
  48. Driver for 2A3C
  49. Regulated B+ sounds worse?
  50. Sylvania console amp rebuild...
  51. E130L Micron
  52. Question Re: Ground Loop Breakers
  53. Source for D3A/7721?
  54. ID a salvaged choke
  55. Magnetwire gauge size converted to metric
  56. ccs what is the best way
  57. parafeed test/measurement setup question.
  58. how do balance pots work?
  59. Issue with parafeed in SPICE
  60. GU-50 Dissected
  61. Need help on ground wiring for Scott 222-B
  62. Heathkit A9-C Mod
  63. Need a 240v, 5vac - 6-10A rectifier transformer
  64. Free Canadian Westinghouse Receiver #101: Super Heterodyne
  65. 6AS7 SET amp discussion from Photo Gallery
  66. DHT 100hz hum
  67. HP 8903B and Pete Millett's Software Problem ?
  68. How to identify an ARC D70 version ?
  69. Valve amp first build - questions
  70. Transfrmer Impedance Question
  71. Disappointing results from RH84
  72. Anyone Loose a Counterpoint SA-5000?
  73. Installing a 610 in to a B&K 500
  74. My first tube preamp (4S)....
  75. Recycling old iron with stiff wires.
  76. 6EM7 as driver... help !!!
  77. changing R1 value in SE amp
  78. Heater CCS makes for low voltage
  79. DHT & Indirect on same line?
  80. Which tube preamplifier kit for LM3886 amplifier?
  81. budgie pre-amp
  82. ecl82 class A pp, need schematic
  83. Input low pass preferred method
  84. cary SLP50A
  85. se output options for single/balanced tda1541
  86. FM noise in Fisher 90-T in FM mode
  87. ST Triodes?
  88. TUBECAD SE.
  89. RH84 build with SS recto and voltage doubler (any input?)
  90. Tube identification
  91. Brand new cap overheating - argh
  92. High Power Valves
  93. Tubelab SSE B+ and cathode resistor questions
  94. HIFI world 6080 se
  95. EF86 triode question
  96. Connecting a Headphone Jack to a Preamp
  97. PSE 300B "French connexion"
  98. Making a custom tube characteristic graph
  99. 300B DRD power supply
  100. Insanely High Common Mode Voltage Shunt Measurement
  101. Heathkit AA-151 troubles
  102. Tube Power supply question...
  103. Noob question on power transformer primary input voltage
  104. Dynaco ST35 testing for a blown power transformer
  105. 6n6p tube buffer
  106. Welborne Labs
  107. GU-50 triode
  108. Help track down noise in gyrator
  109. Earphone Amp Improvements
  110. Protecting Wire
  111. 45 SET : tubelab vs get*set*go vs ?
  112. 6SL7 in Maggy 175 amp...
  113. Heater soft start for series-connected preamp valves
  114. low/no gain follower
  115. Data for 6BD2A or 6BD2
  116. isolation test
  117. Western Electric 437A preamp
  118. solid-state rectrification
  119. Class AB
  120. push-pull
  121. Need help ID tango-lookalike transformers
  122. TV Valves blast from the past..
  123. Tubes suggestions for parafeed headphones amp ?
  124. CCS Loadline
  125. Universal pover supply for ECC85 EL84
  126. Conversion Project
  127. Dynaco PAS I/O PCB Grounding
  128. CCS for anode load
  129. OTL Power Supply: Halfwave vs Virtual Ground
  130. Can NOS tubes have emission staining on the glass?
  131. Pentode pre/compressor (warning nube attempt at circuit drafting) --suppressor grid
  132. Capacitor Drain for Tube Bench Power Supply ?
  133. Diodes, diodes, diodes...
  134. Grid leak resistors and dc-coupling
  135. Output transformer at speaker?
  136. Newbie just wondering if this PP amp looks ok
  137. 6P36S push pull HiFi amp
  138. Another Output Transformer Wiring Question
  139. Cathode bias for EL84 PPP
  140. Output Transformer Wiring Question
  141. NJ7P Tube Database
  142. solving my old radiogram sound issues - help
  143. 6H9c Idle Current.
  144. 12E1 SE amp suggestions.
  145. Direct Coupled Output Stage, DC Bias Balance
  146. Pre-amp tube suggestions for 2A3 output tube
  147. AirTight ATM-1 Schematic
  148. Counterpoint SA 5000 Service manual and PSU
  149. Rectifier tube ? - Berman 76 preamp
  150. Cathode feedback (SE amp)
  151. Will anybody interest in stamp size ccs module?
  152. Fairchild voltage questions
  153. Help with a Sylvania 7695 Project
  154. Flicker Noise dominates triode noise in audio (AES)
  155. A tube for SE with 1k-1k5 load
  156. scott stereomaster 233 restoration
  157. Homebrew Dynaco MkIII Problems - PLEASE HELP!
  158. What to do with C3g tubes
  159. Can anyone ID an output transformer's part number?
  160. Nestorovic NA-1 & Alpha-1 Schematics
  161. Data for 6BD2
  162. Ken Shindo R.I.P
  163. HiFi 6n9p EL34 B + 5z3p Class A Tube valve amplifier
  164. Seas Trym with SE KT88 amplifier?
  165. 845-Amp-IT-Coupled
  166. Data for 6RA3
  167. Miniwatt N3 not turning on!
  168. I need ideas on a can capacitor
  169. Help with tube for power supply...
  170. AVC vs TVC for 10y line preamp
  171. help needed with Lumley 120 monoblocks + Sonus Fabre speakers
  172. help on 845 amp
  173. High voltage power tube question
  174. Tribute OPT for PSE 300B
  175. Floating Paraphase.
  176. 6Q7G as driver in RH807
  177. Custom tubes4hifi m-125 monoblocks
  178. Antique Audio Preamlifier made in USA
  179. directly heated tube rectifiers
  180. Biasing a 12EA6 low voltage pentode
  181. Power supply doubt
  182. Vinyl Savor's Octal 6GL7 preamp?
  183. 837 tube
  184. Tone control bypass (Kontakt KT-7)
  185. drdwers
  186. Amplifier Sensitivity?
  187. identify nickel laminations
  188. Recapping Vintage EL84 amp
  189. opinion on dynaco mark VI
  190. How can i have 450 Volts ?
  191. Balanced Preamp
  192. ecc99-300b
  193. Question about the tube specs/testing?
  194. Transformer Winding Configuration, Hafler 2,815,402
  195. PSU with SS Choke for Loftin-White 2a3.
  196. HP 8903 Pete Millet's Software on Window 8 ?
  197. Cathode Destruction
  198. Earth SuperBass B-2000 bass head info needed
  199. More radio shack dissapointment
  200. What to do with transformer secondary when used as a choke?
  201. Slight transformer buzzing in Engineers Amp
  202. Couple Gyrator Questions
  203. Shishido/Loftin-White 2A3/45 Extasy..
  204. When is a tube not a Valve?
  205. Relay Recommendataion
  206. 6080 monotriod amplifier
  207. Tetra Sans PS Phono Stage Power Supply
  208. transformer test
  209. Could someone tell me more about the Mesa Boogie Strategy 400?
  210. New OTL headphone project with EC88 and 6080
  211. Philips Tube Code
  212. Edcor GXPP vs. CXPP
  213. Shorting or Non-Shorting Rotary Switch: Hi-Low Z tube headphone amp
  214. Marshall Guitar Conversion 12AX7 Replacement
  215. affordable potted power transformer?
  216. Am I pushing the envelope too far? Layout concerns.
  217. Pete Millet's Uniamp
  218. 6211 for???
  219. Picking an output transformer: power vs. sound quality
  220. Tube emulation with transistors
  221. Altec 1570b Tube Swap
  222. Popping stepped attenuator
  223. 6922 driver/cathodyne - direct coupled
  224. Solid state rectifier with these tubes
  225. Need advice -- Improving an old tube amp
  226. KT88 SE developed a buzz
  227. Guidance on amp design
  228. OTL3 Autograph Series
  229. DAC Tube i/v help!
  230. Need help figuring out a tube amp!
  231. Parallel 12AT7 output stage design?
  232. 6SN7 SRPP
  233. Problem Bi-Amping
  234. Amplifier recommendation
  235. DIY tube amplifier got no sound but all tubes are fired up.
  236. Circuit for Melos 333
  237. DHT Tube regulated power supply
  238. Akai M8 Restoration, newbie questions
  239. Bench Power Supply - what to get?
  240. Telefunken RS241 Design Help
  241. Telefunken Hymnus 5328 MX console
  242. Some Dummy DHT Questions
  243. Inductance loading tube stage questions
  244. Simple tube kit for tube sound ?
  245. Voltage Divider with Capacitor Across Resistor to Ground
  246. FM Demodulator for Tube receivers
  247. The best amp to DIY?
  248. SE Tubelab / EL34b tubes / Transformers
  249. Heath Kit Pre Amp
  250. Preamp hiss noise

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