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  1. Lumley ST70 Output impedance change and other questions
  2. AC Heater reference to B+
  3. Two tube class a2 se trioded el84 with 12dw7 cathode follower driver?
  4. Overly complicated 1.6A CCS Heater Supply
  5. Hibryd amplifier with tube/valve ECC88 (PCC88) and chipamp LM1875
  6. Tube/Valve buffer with ECC88
  7. High(er) gm octal pentodes?
  8. Shielding Characteristics of Copper Clad PCB
  9. Starting a Meixing MC34-A07 modification project
  10. 6V SLA Dropping resistor for a 5VDC Filament Supply
  11. Wind (Thermionic?) noise, and other strange sounds
  12. Suggestions for an tube-amp with KT88
  13. SE-100 Golden Tube Audio - REPAIR
  14. Power amp vs preamp topology
  15. EL34 Characteristics for Ug2 400V
  16. old Heathkit amp
  17. Toroid OPT for 300B
  18. Help: Connecting two Fluke meters in series
  19. Preamp Volume Controls
  20. Output SE Transformer Question
  21. Vintage electrolytic capacitors
  22. Silver bearing grease for tube sockets
  23. Should I try adding a small Tube Preamp to a DTA-100?
  24. IS 6N6P A DIRECT REPLACEMENT FOR ECC88CC ?
  25. Dynaco stereo 70 look alike
  26. Vacuum Tube factory: For Sale!
  27. Does anybody know anything about this German console
  28. Heater dillema for multi chassis phono stage.
  29. Q: lifespan of JJ ECC99 tubes
  30. Cold solder joint?
  31. Input Impedance/Buffers
  32. Old capacitors..Comments..
  33. Shizuki capacitors?
  34. Spectrum Analyzer: What to get ? What to look for in a spectrum analyzer ?
  35. Amperex Orange Globe 12ax7 ,Brimar cv4004
  36. Question about transformer lamination stacking techniques
  37. line preamplifier with 6c10
  38. Homebrew Toroidal Output Transformer
  39. Line output tube
  40. MJK's SSSchadeode
  41. Any one know were to buy the fu-80 tube?
  42. Maida Regulator PCB
  43. Suggestions for 7k output transformers.
  44. Help: Fluke 87V Meter Calibration
  45. Searching for Primaluna Prologue Three schematic
  46. JCM Build - Hum and Crackle
  47. Silvertone radio to Guitar Amp conversion question.
  48. Pentode Regulation Question
  49. pentodes with CCS load?
  50. Are these tube PCBs any good ?
  51. china 6L6 SEdiy
  52. What are your opinions of the ST-70 and St-120
  53. Baffle Step Compensation Tube Circuit
  54. 6L6 to 7027 cathode resistor value
  55. PCB to mount snapmout electrolytic capacitors
  56. Dared MC-7P Upgrades
  57. adapter to go from 6L6 to 807
  58. My Experience with a Jolida 202s (SoFar..)
  59. Cathodyne gain calculator link
  60. Dynakit ST-35?
  61. PSUD modeling old amp PS fails.
  62. Fisher 800 push-pull output stage not symmetrical. Why?
  63. Question of D3a driving 300B
  64. old console amp
  65. st35 vs millett DCPP vs tubelab simple SE
  66. New Tim Mellows OTL project
  67. Melted my mains transformer - Where to find replacement ?
  68. Strange.................
  69. Effect of high mains voltage?
  70. Kent SL 21 Tube head need help!!
  71. Hexfred or SIC rectifiers in choke supplies
  72. 'Strange' bass boost with impedance transformer
  73. Did my tubes go south ?
  74. Use of Tango NN-600-600 Transformers ?
  75. Anyone have an explanation for break(burn)in
  76. The Right Tube & TRannie
  77. 6SL7 / 6SN7 Phono
  78. Tube integrated amp in China.
  79. Power supply issues with Borbely style 12AU7/MOSFET hybrid
  80. heater elevation ground point
  81. Edison 12, can anyone help?
  82. Delay B+ using relay?
  83. New Schematic Linestage Tube Preamp using EF86 & 12AX7
  84. Phonostage (WAD clone) and 12B4A Preamp Build
  85. Interstage coupling feedback
  86. Just received a Yaqin MC-10T and have a couple of questions.
  87. Amplifier Troubleshooting
  88. Audio Preamplifier with PCC88
  89. Need Help With These TriodeDick Preamp Scematics
  90. I need help with my amp project
  91. Looking for unbalanced to balanced transformer
  92. Power Transformer Question
  93. My First Tube Amp Project S5 K-12G
  94. 6E2 vacuum tube compatibility
  95. Tube condenser microphone help!
  96. Audio transformer feedback loop
  97. yaqin vk amp without the loudness button uk version
  98. PP driver stage with local feedback
  99. Leader LAG-120B Audio Generator Manual Wanted
  100. Transformer brand question
  101. Single ended at 24Vcc 1+1W @ 8 ohm - three tubes
  102. EL41 PP power supply questions
  103. Reduce output on a ECC88CC class A pre-amp !
  104. SE OT impedance question
  105. DIY Tube amp book?
  106. 6P6P tubes?? will 6V6's work?
  107. RH84 amplifier build, but very weak distorted output
  108. Paralleling filament transformers
  109. 6ak5 triode mode disipation
  110. Equalize or Not Equilize when driving a tube amp ?
  111. How to retire from DIY and sell off all your workshop contents?
  112. New to tubes and diyaudio here, question about torrids and tube amps...
  113. PC Based Oscilliscope for Tube Curcuits
  114. Lamp in HV Centre Tap - why?
  115. EL156 PP
  116. 300B resistor
  117. Has anyone here bought from ussr-tubes.com ?
  118. Which cathode bypass capacitor?
  119. RIAA Schematic for-6SL7,7308 or?
  120. Chassis' for Tube Gear
  121. Convergent Audio Tech SL1 preamp
  122. Buy Them While You Can Not When You...
  123. Does anyone know of Thomas Martens?
  124. OTL for 40-80ohm speakers
  125. Morrison Dinosaur
  126. pcl86=14gw8 ??
  127. My little SE with GU50
  128. Source follower in a DC-coupled pp amp?
  129. Tube chassis for retail sale.
  130. Poor man's power supply
  131. High voltage driver for AB2 operation GU81m tubes
  132. 5AR4 rectified power supply question
  133. Direct Coupled Amp
  134. Is this EL84 kit from Germany worth fooling with?
  135. 6v6 PP Pentode mode
  136. 5 pin octal tube socket
  137. RCA Manual Typo?
  138. pete millet low mu preamp
  139. Capability to drive the 211 PP
  140. 6BG6G SE advice needed.
  141. Signal Generator: Which one to buy ? What to look for in a signal generator ?
  142. Power booster
  143. I've just build this steroe amplifier
  144. What amp to build? Push Pull, SE? thoughts?
  145. amp sounds bad- fatman itube 252
  146. 6C33 single ended class A2 (cathode network question)
  147. Sweet Peach EL34b Amp - Distortion?
  148. 6C33C socket types, where to buy?
  149. haedphone amp. using 6418< NEED HELP
  150. finished my 6au6/807 amplifier
  151. Thinking about building an S5 16LS 16W amp I've got some questions for the forum./
  152. Broskie "Unbalancer" - transformer specifications
  153. Tube chess.
  154. How Its Made - Vacuum Tubes
  155. Please help me understand power supply load
  156. 12AU7 - How absolute are maximum ratings?
  157. Tube rejuvination
  158. Article: Samsung brings back tubes in audio dock
  159. 1st build suggestions
  160. Parallel SE output
  161. Fixed Bias question
  162. vintage ua 610 schematic
  163. Which KT88 PP and which Transformers?
  164. Some more special small-signal tv tubes
  165. MR 67 Coupling Caps
  166. Help - YAQIN MS-20L schematic
  167. Power and Speaker cables
  168. v1 tube keeps going microphonic help! 5e3 build
  169. Leak TL12+ with triode mode EF86
  170. diy tube dampers
  171. VTVM troubleshooting help
  172. PP amp crossover distortion
  173. Sanity check please? ST-70(-ish) power supply
  174. Thoughts of apparent noise on ground - due to power tx?
  175. hybride circlotron
  176. Clone
  177. 8156 Beam Pentode Compactron
  178. DOUBLE TRIODE (6N16B)
  179. looking for Tube I/V analog for dac schematic ?
  180. NewBee PPEL84
  181. Whooaa! Now we're talking.
  182. Cinema Engineering AT-18
  183. Back from school
  184. Amp ideas for my spare 3.3k output transformers.
  185. HEllo and a few suggestions please
  186. 1SH24B Pre-Amp (or buffer?)
  187. Anode cap for GU 29 / QQE06/40
  188. Back to back autotransformers for B+?
  189. Sound Valves M60 schematics
  190. Volume Pot for RH84
  191. Mengyue mini el34b
  192. Which Chinese integrated tube amp have the power for Rock Song ?
  193. Help on transformers please
  194. 300B alternatives
  195. Anybody using a tube amp in their car?
  196. What is a KT88-98?
  197. 6au6 line stage a bad idea?
  198. Making a Kron tube
  199. AY Symphonies preamp
  200. Need to Upgrade Tube Preamp Volume Pot
  201. Tubelab Simple SE low B+
  202. Filament AC or DC?
  203. rasping sound from Dared VP-16
  204. Anyone have any "small signal" pentode models?
  205. Power amp distortion for modern amps
  206. Help with EL504-based amplifier
  207. Tubes: Are they worth it?
  208. Radio Shack Boston Monobloc (fuse question)
  209. 829B 3E29 Pentode PPP?
  210. Fixed Autobias?
  211. Best wishes
  212. Radiotron A504 amplifier schematic
  213. Blown power tube - a short story
  214. Hickok 752A calibration?
  215. replace EL34 with EL37 !?
  216. Mono push-pull driver PCB
  217. Magnavox 139AA schematics, info?
  218. Anyone knows what driver tube on DowdyLama's GM-70......
  219. Building an amp around the QB5/1750 transmitter tube
  220. Instrument amp from '59 Lowrey donor chassis.
  221. cascoded gyrator loaded 6H9C to low idle.
  222. vacuum tube DAC and connection
  223. Dynaco ST70 II Right Channel Out
  224. ST70 Inrush Issue
  225. ECC88 OTL heaphone amp
  226. Help with deciding to build or buy Tube amp.
  227. Luxman LV-105 static on on channel
  228. equivlent of FU-50
  229. placing the volume control
  230. PP 300B ''transformer coupled''
  231. My First Tube Preamp
  232. Tube amp kit and speaker recommendations?
  233. First design GU81M SE triode
  234. Instruments & Amps forum - where is it?
  235. Power supply capacitor question for tubelab simple ss
  236. EL300 = 6FN5 / PL300 = 35FN5 tube
  237. 6U8 driving 45
  238. very low impedance white follower with 6H13C
  239. EL86 Any idea helps.
  240. 6112 and 6111 Mini-preamp
  241. Expert advice on what preamp to chose
  242. Harman Kardon DPR-7, Commander series pre/mixer
  243. input transformer - mumetal casing etc.
  244. Oil-filled caps: ASC versus Panasonic
  245. SOHA headphone amp
  246. Using a single triode as a .......
  247. Sonic Frontiers SFP-1 Phono Stage
  248. Help!! with attenuation.
  249. power up inrush current limiter - anyone using?
  250. Audioromy FU-29, Latest Model 828A Mini Review

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