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  1. New problem with Music Angel KT88
  2. Need help changing 12V heater to 6V
  3. Phono cathode follower challenge!!
  4. 6au6 for stereo?
  5. determining input/output impedance
  6. "Singing" output transformers
  7. Sustitute 5842 for EC86
  8. Vege-toobz ;)
  9. precision electronics inc. tube guitar amplifier
  10. Bad channel in RCA Victor Console
  11. Did tone bypass on PAS what about caps
  12. Pe06/40n
  13. Anyone own an HH Scott LK-72 Integrated amp?
  14. HELP!! Howling K12G!!
  15. McIntosh MC60 Bias question
  16. Connecting a MF tube buffer directly to AKM DAC
  17. How to evaluate RF tubes for power and fidelity?
  18. Amity Amp Nutshell Audio
  19. 8086 Tubes?
  20. Lil' Devil P-P Amp
  21. 6SN7 vs. 6SL7 in Darling amp
  22. BBC AM8/6 mono tube amp schematic
  23. ST70 works with PAS but not another preamp
  24. Freds in 6X5 psu?
  25. Hi-End 50W Push-Amplifier inspired to AudioResearch
  26. Audioromy fu-29 - push pull!
  27. Help - MS-6V6 Yaqin schematic
  28. High Voltage Direct Drive amplifier for Plasma loudspeaker
  29. A Direct-Coupled Amplifier with Cathode Follower 6V6
  30. Separo- Full Pictorial Disclosure- opinions please
  31. Hammond Integrated Amp Kits 1950s
  32. LW6-180 schematic
  33. What to look for in a tube preamp?
  34. Russian-English Translation of 4P1L datasheet
  35. Can anybody identify this
  36. New York Audio Labs (NYAL) OTL1
  37. 5F6A via Mechanical Design
  38. New to tubes, need your advice.
  39. Brook 12a clone
  40. What type of audio transformers to use for tubes / valves
  41. need advice about building tube xover as a piece of art
  42. My first amp project, 6BQ5 (EL84) Single-End
  43. MA 6P1 6AQ5 Push-Pull Valve Tube Integrated Amplifier
  44. Stupid AB bias question
  45. Jamoke Direct to LPT/CCS PP EL34
  46. 4 x EL84 (6BQ5) in Push-Pull - Power Supply
  47. RFC: 300B driven by anode follower (6J5/6SN7)
  48. AVO VCM163 oddity
  49. Shuguang SG-50 ( RCA UX-250 replica) comments ???
  50. Schematic question (Trainwreck)
  51. Novel mode of lithium battery bias
  52. power supply problem in my dream amp...
  53. Understanding how to wire up an Output Transformer
  54. Tube sound without the tube! (almost)
  55. Replace Bypass Cap?
  56. Sales On Sound Vintage 40s Tube Amp Info
  57. Why am I blowing fuses when connecting to next component?
  58. New owner to an old Heathkit AA-121
  59. New amp just finished 6080 pp opt
  60. Aikido as DAC I/V?
  61. Have two 572B-162L USA mfg tubes for trade
  62. Potentiometer question
  63. DHT circuit development for noob:)
  64. modifying a schematic
  65. TV-4a/u Weston USM Tube Tester: got a manual or schematic?
  66. Any idea what the primary impedance of the X101-B OPT is?
  67. Transformer Ratings
  68. noisy Gain knob
  69. overcooling question
  70. Ecl82 PP amp rebuild - suggestions?
  71. GU-50 PP amp project - Any favs?
  72. External DC power supply?
  73. shielded wire
  74. Noise & attenuation
  75. Thinking of building the SV300B Push-Pull
  76. Transformers for Push-Pull sweep tubes
  77. 12BG3's
  78. Valve audio circuit design questions.
  79. jcm 800 preamp?
  80. srpp & distortion
  81. Common cathode circuit values
  82. Resilient Mounts - Materials Science help please
  83. Raytheon 6G-B6 information
  84. Output transformers
  85. Filament winding wire diameter
  86. EL34 for ST70
  87. Building a Tube PreAmp for Teddy
  88. series capacitor values..
  89. Music Angel KT88 correct circuit
  90. G1=G2/mu Scaled Drive Strawman Design
  91. Output transformer for 845 SE triode amp
  92. "10 year burn in" T Shirt arrives!!!
  93. Thinking out loud -- VT-33 headphone amp?
  94. Elektor USB magic eye
  95. Maganavox Tubes Made in USA?
  96. Magic Eye VU Meter
  97. More EBAY Madness !!
  98. Major modifications of a Bogen AP-35
  99. Help with circuitmaker Pentode model
  100. Kt-120 ?
  101. Help with 6F5/6L6 rebuild...
  102. What Speaker for Webcor Tube Amp?
  103. Possible use for Pentagrid tubes??
  104. Rogers Cadet III integrated
  105. Quad II - Can 6P3S-E/GU50 be used as KT66 direct replacement?
  106. Using Grid2 screen signal -
  107. 6n6p tube as output tube for small guitar amp
  108. YAAGLI - Yet Another Aikido Ground Loop Issue
  109. Tube rectifier question.
  110. Dac with tube preamp?
  111. 5712 tube data needed
  112. 180 pF capacitor and other questions
  113. Simple question: Stereo to monos. How.
  114. Plate dissipation specs for 21KQ6
  115. Yaqin pre-out for subwoofer?
  116. Grid Chokes and choke load
  117. First tube amp project: GO!
  118. Hybrid Amp
  119. Circuit weirdness?
  120. How suitable is this tranformer for a Tube Amp Project?
  121. Best way to solder gold-plated components?
  122. Phono EQ hiss/white noise!!!
  123. help needed with grounded grid CCS upgrade
  124. Resistor wattage?
  125. SCORE! Kepco Tube Power supplies!
  126. 6SN7-2A3 SE Amp - James Transformers
  127. Capacitor explosion.
  128. JJ ECC81/12AT7 Longevity
  129. 6V6GTA Tubes, H/K A300 Transformers, Now What?
  130. DIY valve radio
  131. U600 rectifier valve datasheet, please !!!
  132. Capacitors
  133. please help ! 5687 cd player buffer
  134. LK-72 mis-wired or am I confused?
  135. Need help with tube ID.
  136. spud amp 6c45pi vs 5842
  137. Air gapping transformers
  138. Voltage Measurement
  139. Cornell-Dubilier Caps Western Electric 91A Amplifier
  140. My take on a modern ST-70
  141. pls suggest a project
  142. Help with input stage driver for EL84 output stage
  143. Trying to make sense of the Sweet Peach
  144. Cornell-Dubilier Paper In Oil Capacitors
  145. lm3886 + cathode follower PS problem
  146. Completely differential amplifier final stage
  147. Capacitors in series for coupling?
  148. Help needed with messed-up-amp repairs.
  149. 6DJ8 tube schematic as balanced line stage?
  150. 6DJ8 (balanced) tube line stage
  151. Knight amp circut voltages
  152. Make Mono Phonograph into Mic Preamp?
  153. Yet another passive attenuator
  154. What tube is this?
  155. El Cheapo ok for a first build?
  156. Anyone in Vancouver with a tube tester?
  157. How long can I expect a tube to last
  158. Output transformers... which one...?
  159. My MA845 modded and questions
  160. Sun Audio SV-2a3 HK Clone
  161. departure and tube slop
  162. Wire construction for capped tube plates
  163. Grid resistor location
  164. Meng Yue X1 trial
  165. Yarland pro845
  166. Faulty 5881 tube ?
  167. MF Xpre - help pls!!
  168. Heaters Voltage
  169. Pleas help identify this McIntosh valve amplifier
  170. Curves for Triode Connected 6EW6
  171. microwave oven transformer..
  172. Marantz 8b tubes
  173. Request: The schematic of Audible illusions MODULUS 3
  174. How many watts are really needed?
  175. Worn Tube Rectifier
  176. Bogen CHB35a Problem
  177. 29KQ6 Datasheet
  178. Help selecting a thermistor
  179. Beard P.101, new-to-me.
  180. Audioromy 838 Amp Broke need help..
  181. Inexpensive Guitar Amp
  182. How to Read faded Tube Numbers
  183. Test data for 6H30PI & Hickok 539??
  184. Tube Text books "Reich"
  185. PCL805 parafeed SE idea + question
  186. 12V driver tubes for Engineer's Amp?
  187. >200W with 6BG6GA
  188. Leak stereo 20 modification
  189. Baby Huey components
  190. Monstrous 1kW amp!
  191. blue glow, how?
  192. Using different transformer taps for each needed B+
  193. Heating DHT Cathodes a new way???
  194. Noise problem in 572-10 PP amplifier
  195. Power transformer question (Bud?? calling Bud)
  196. Identifying 12AX7 Tubes
  197. PAS3 to volume pot
  198. 5F6A Amp build help (Fender Bassman)
  199. Jean Hiraga SE KT88
  200. ASC motor run caps....can they be mounted horizontal???
  201. Millivolt signal and tube sockets
  202. 6N1P Data sheet differences
  203. Confident in buying tubes on ebay ?
  204. CCS Troubles
  205. Mengyue el34b schematic needed
  206. safest way to power up a new build
  207. Phono amp Raytheon 6418 tubes
  208. YL1350 Help characteristic and output tranies
  209. EL84 PP using 5K plate to plate primate OPT
  210. VR tube flashing?
  211. Tabletop 12au7 Amp
  212. Renovated website: www.pmillett.com, www.tubebooks.org
  213. Troubleshooting Eico HF-85
  214. Custom chassis europe
  215. Mixer from pre-amp design
  216. SE Output Tranny - Dumb Question
  217. What Tube for a Differential Amplifier?
  218. Thinking of buying a Lumley Reference ST70 with attached passive pre
  219. Psu
  220. Protection of the Irreplaceable
  221. Trix T621 PA amplifier (British)
  222. Resistor types ??? (carbon or metal film)
  223. First Amp Build
  224. Help ID these little PP output xfrmrs?
  225. Rectifier voltage drop question
  226. dc and ac heater supply in Aikido
  227. Can I obtain a suitable B+ voltage with spare parts?
  228. Multi tap transformers dont use the whole windings?
  229. First layout with spud
  230. EL152, GU50 and EL156
  231. Convert a 110 volt Mcintosh Mc275 to 230volt
  232. transformer maker list
  233. design a preamp, so easy....
  234. SRPP - determining load and balancing
  235. Idea for all C3g phono stage
  236. temp check
  237. Pentode Question
  238. K & K Audio Transformer phase splitter?
  239. Transformer Efficiency
  240. How to test a 6H30 tube
  241. Karaoke Tube Hi-end In The Future
  242. What makes the old McIntosh stuff so good?
  243. Paralell 10M45's for 71A DHT filament?
  244. Rod Coleman CCS/gyrator help
  245. Differential amp.Do they pass 2nd harmonics or reject them?
  246. A half 6sl7 tube
  247. failing tube
  248. Capacitor in series - Resistor across ?
  249. Tube preamp choise...
  250. Some general tube questions from a Tube newbie !!

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