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  1. External DC power supply?
  2. shielded wire
  3. Noise & attenuation
  4. Thinking of building the SV300B Push-Pull
  5. Transformers for Push-Pull sweep tubes
  6. 12BG3's
  7. Valve audio circuit design questions.
  8. srpp & distortion
  9. Common cathode circuit values
  10. Resilient Mounts - Materials Science help please
  11. Raytheon 6G-B6 information
  12. Output transformers
  13. Filament winding wire diameter
  14. EL34 for ST70
  15. Building a Tube PreAmp for Teddy
  16. series capacitor values..
  17. Music Angel KT88 correct circuit
  18. G1=G2/mu Scaled Drive Strawman Design
  19. Output transformer for 845 SE triode amp
  20. "10 year burn in" T Shirt arrives!!!
  21. Thinking out loud -- VT-33 headphone amp?
  22. Elektor USB magic eye
  23. Maganavox Tubes Made in USA?
  24. Magic Eye VU Meter
  25. More EBAY Madness !!
  26. Major modifications of a Bogen AP-35
  27. Help with circuitmaker Pentode model
  28. Kt-120 ?
  29. Help with 6F5/6L6 rebuild...
  30. What Speaker for Webcor Tube Amp?
  31. Possible use for Pentagrid tubes??
  32. Rogers Cadet III integrated
  33. Quad II - Can 6P3S-E/GU50 be used as KT66 direct replacement?
  34. Using Grid2 screen signal -
  35. YAAGLI - Yet Another Aikido Ground Loop Issue
  36. Tube rectifier question.
  37. Dac with tube preamp?
  38. 5712 tube data needed
  39. 180 pF capacitor and other questions
  40. Simple question: Stereo to monos. How.
  41. Plate dissipation specs for 21KQ6
  42. Yaqin pre-out for subwoofer?
  43. Grid Chokes and choke load
  44. First tube amp project: GO!
  45. Hybrid Amp
  46. Circuit weirdness?
  47. How suitable is this tranformer for a Tube Amp Project?
  48. Best way to solder gold-plated components?
  49. Phono EQ hiss/white noise!!!
  50. help needed with grounded grid CCS upgrade
  51. SCORE! Kepco Tube Power supplies!
  52. 6SN7-2A3 SE Amp - James Transformers
  53. JJ ECC81/12AT7 Longevity
  54. 6V6GTA Tubes, H/K A300 Transformers, Now What?
  55. DIY valve radio
  56. U600 rectifier valve datasheet, please !!!
  57. Capacitors
  58. please help ! 5687 cd player buffer
  59. LK-72 mis-wired or am I confused?
  60. Need help with tube ID.
  61. spud amp 6c45pi vs 5842
  62. Air gapping transformers
  63. Voltage Measurement
  64. My take on a modern ST-70
  65. pls suggest a project
  66. Help with input stage driver for EL84 output stage
  67. Trying to make sense of the Sweet Peach
  68. Cornell-Dubilier Paper In Oil Capacitors
  69. lm3886 + cathode follower PS problem
  70. Completely differential amplifier final stage
  71. Capacitors in series for coupling?
  72. Help needed with messed-up-amp repairs.
  73. 6DJ8 tube schematic as balanced line stage?
  74. 6DJ8 (balanced) tube line stage
  75. Knight amp circut voltages
  76. Yet another passive attenuator
  77. What tube is this?
  78. El Cheapo ok for a first build?
  79. Anyone in Vancouver with a tube tester?
  80. How long can I expect a tube to last
  81. Output transformers... which one...?
  82. My MA845 modded and questions
  83. Sun Audio SV-2a3 HK Clone
  84. departure and tube slop
  85. Wire construction for capped tube plates
  86. Grid resistor location
  87. Meng Yue X1 trial
  88. Yarland pro845
  89. Faulty 5881 tube ?
  90. MF Xpre - help pls!!
  91. Heaters Voltage
  92. Pleas help identify this McIntosh valve amplifier
  93. Curves for Triode Connected 6EW6
  94. microwave oven transformer..
  95. Marantz 8b tubes
  96. Request: The schematic of Audible illusions MODULUS 3
  97. How many watts are really needed?
  98. Worn Tube Rectifier
  99. Bogen CHB35a Problem
  100. 29KQ6 Datasheet
  101. Help selecting a thermistor
  102. Beard P.101, new-to-me.
  103. Audioromy 838 Amp Broke need help..
  104. How to Read faded Tube Numbers
  105. Tube Text books "Reich"
  106. PCL805 parafeed SE idea + question
  107. 12V driver tubes for Engineer's Amp?
  108. >200W with 6BG6GA
  109. Leak stereo 20 modification
  110. Baby Huey components
  111. Monstrous 1kW amp!
  112. blue glow, how?
  113. Using different transformer taps for each needed B+
  114. Heating DHT Cathodes a new way???
  115. Noise problem in 572-10 PP amplifier
  116. Power transformer question (Bud?? calling Bud)
  117. Identifying 12AX7 Tubes
  118. PAS3 to volume pot
  119. Jean Hiraga SE KT88
  120. Millivolt signal and tube sockets
  121. 6N1P Data sheet differences
  122. Confident in buying tubes on ebay ?
  123. CCS Troubles
  124. Mengyue el34b schematic needed
  125. safest way to power up a new build
  126. Phono amp Raytheon 6418 tubes
  127. YL1350 Help characteristic and output tranies
  128. EL84 PP using 5K plate to plate primate OPT
  129. VR tube flashing?
  130. Tabletop 12au7 Amp
  131. Renovated website: www.pmillett.com, www.tubebooks.org
  132. Troubleshooting Eico HF-85
  133. Custom chassis europe
  134. Mixer from pre-amp design
  135. SE Output Tranny - Dumb Question
  136. What Tube for a Differential Amplifier?
  137. Thinking of buying a Lumley Reference ST70 with attached passive pre
  138. Psu
  139. Protection of the Irreplaceable
  140. Trix T621 PA amplifier (British)
  141. First Amp Build
  142. Help ID these little PP output xfrmrs?
  143. Rectifier voltage drop question
  144. dc and ac heater supply in Aikido
  145. Can I obtain a suitable B+ voltage with spare parts?
  146. Multi tap transformers dont use the whole windings?
  147. First layout with spud
  148. EL152, GU50 and EL156
  149. Convert a 110 volt Mcintosh Mc275 to 230volt
  150. transformer maker list
  151. design a preamp, so easy....
  152. SRPP - determining load and balancing
  153. Idea for all C3g phono stage
  154. temp check
  155. Pentode Question
  156. K & K Audio Transformer phase splitter?
  157. Transformer Efficiency
  158. How to test a 6H30 tube
  159. Karaoke Tube Hi-end In The Future
  160. What makes the old McIntosh stuff so good?
  161. Paralell 10M45's for 71A DHT filament?
  162. Rod Coleman CCS/gyrator help
  163. Differential amp.Do they pass 2nd harmonics or reject them?
  164. A half 6sl7 tube
  165. failing tube
  166. Capacitor in series - Resistor across ?
  167. Tube preamp choise...
  168. Some general tube questions from a Tube newbie !!
  169. How unsafe is an Autotransformer?
  170. Can a dual triode use a common cathode resistor?
  171. Dared MC-7P
  172. SRC2496 Miniatube tube output stage
  173. Tubetech smc2b multiband compressor
  174. Tweaking/correction question - Xindak MT-1 balance
  175. Em87/ em84
  176. Pioneer SM-83 restoration
  177. Best GM70 version suited for audio??
  178. PSUDII transformer question
  179. what are these caps doing?
  180. Distortion VS OPT impedence
  181. Heater wiring approaches
  182. Rogers pops, crackle and static are driving me mad!
  183. tube power enough?
  184. Ever notice those scratches on some plates??
  185. JE 45/2A3 SE 2001 edition
  186. Mini tube output stage
  187. Mismatched Power Tubes
  188. Eimac 35TG amplifier glows !
  189. ECC88 Shield
  190. One amp channel for mid, the other for tweeter, to SE or to PP, THAT is the Question?
  191. SRRP Output stage. Calculating power output.
  192. bogen chb-35
  193. Rating for resistors in power supply?
  194. Effects of Bias /Ammeters....
  195. pentode mode distortion 6LR8? George?
  196. Info for 6b4g PP
  197. Understanding unregulated PSU
  198. C3m C3g tubes
  199. More ebay craziness
  200. Shunt Capacitor
  201. 6021 Load Line
  202. TubeRiaa - How to calculate the impendance?
  203. Fake Vacuum Tube Amps - Funny but real
  204. 12.6v+ vs 6.3v+/- heater supply
  205. Distortion Measurements
  206. modifying kt88 pp ul amp
  207. Aikido help!
  208. Are Positive Grid Voltage Traces Necessary?
  209. New to Tubes
  210. How to read "Typical Characteristics" curves
  211. 12B4 pre output cap and LF instability
  212. attractive amp kit?
  213. Stereo 7O with transformer phase splitter?
  214. Filter Cap Recommendation
  215. New Guy...With a question...
  216. Interesting wiring guide find, thanks NASA!
  217. marantz 9's OPT data
  218. Why do my amps want signal ground and safety earth connected?
  219. scott 299c
  220. Tube Schematics
  221. JLTi EL34 and KT88 Amplifiers
  222. Radford sta15 looking for a nice preamp...
  223. Really subjective question
  224. Pen-toad Question
  225. Revox Model 40- leave it alone or dig in?
  226. Driver of Sumo Tubes PP for anybody: Shematic and PCB
  227. Output transformer from rowe ammi mm4
  228. Equivalent Circuit?
  229. 300b tube life
  230. CBS tube?
  231. Looking for a 700vdc supply
  232. Are all 9-pin sockets the same?
  233. Problem with short Test
  234. Troubleshooting 12B4/RH84/Akai project
  235. hi-end vacuum tube phono preamplifier
  236. PCB help
  237. QUICK transformer Question HELP
  238. Configuring an AB class amp to work in pure A class
  239. SCott LK-48-B balance pot
  240. lost a tube
  241. Lee Laboratory - model 50 Cruiser
  242. 1/2 of 12AX7 in single envelope?
  243. 2 pairs of 8150's
  244. 8150 Tubes
  245. Capacitor/Choke value in SET buffer supply? (95 vdc B+)
  246. NJ Tube Auction
  247. pentode buffer
  248. Tube Buffer? 12ax7?
  249. What is this tube?
  250. Kits

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