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  1. Tube Rectifiers do sound different
  2. 6922, a 6DJ8 replacement??
  3. QB2/250 amplifier
  4. WE 350B and 311A
  5. Single ended 300b's
  6. More power!
  7. How the magnetic affect the sound of tube amplifier
  8. Valves replacement for Copland CT402
  9. Changing valve damage
  10. Tube phono preamplifier by 12ax7
  11. Altec 353A oddity
  12. I need to lose that Hummmm
  13. Reduce B+ with zener
  14. Old Marshall plexi clone problem
  15. triode and pentode 6v6 in parallel
  16. How to make mic input transformer 150:50KCT for mic tube preamp???
  17. Webcor 12AU7 is it a Mullard?
  18. Everett AO48
  19. Resurrecting old tubes
  20. Lumley ST70 Output impedance change and other questions
  21. AC Heater reference to B+
  22. Two tube class a2 se trioded el84 with 12dw7 cathode follower driver?
  23. Overly complicated 1.6A CCS Heater Supply
  24. Hibryd amplifier with tube/valve ECC88 (PCC88) and chipamp LM1875
  25. Tube/Valve buffer with ECC88
  26. High(er) gm octal pentodes?
  27. Shielding Characteristics of Copper Clad PCB
  28. Starting a Meixing MC34-A07 modification project
  29. 6V SLA Dropping resistor for a 5VDC Filament Supply
  30. Wind (Thermionic?) noise, and other strange sounds
  31. Suggestions for an tube-amp with KT88
  32. SE-100 Golden Tube Audio - REPAIR
  33. Power amp vs preamp topology
  34. EL34 Characteristics for Ug2 400V
  35. old Heathkit amp
  36. Toroid OPT for 300B
  37. Help: Connecting two Fluke meters in series
  38. Preamp Volume Controls
  39. Output SE Transformer Question
  40. Vintage electrolytic capacitors
  41. Silver bearing grease for tube sockets
  42. Should I try adding a small Tube Preamp to a DTA-100?
  43. IS 6N6P A DIRECT REPLACEMENT FOR ECC88CC ?
  44. Dynaco stereo 70 look alike
  45. Vacuum Tube factory: For Sale!
  46. Does anybody know anything about this German console
  47. Heater dillema for multi chassis phono stage.
  48. Q: lifespan of JJ ECC99 tubes
  49. Cold solder joint?
  50. Input Impedance/Buffers
  51. Old capacitors..Comments..
  52. Shizuki capacitors?
  53. Spectrum Analyzer: What to get ? What to look for in a spectrum analyzer ?
  54. Amperex Orange Globe 12ax7 ,Brimar cv4004
  55. Question about transformer lamination stacking techniques
  56. line preamplifier with 6c10
  57. Homebrew Toroidal Output Transformer
  58. Line output tube
  59. MJK's SSSchadeode
  60. Any one know were to buy the fu-80 tube?
  61. Maida Regulator PCB
  62. Suggestions for 7k output transformers.
  63. Help: Fluke 87V Meter Calibration
  64. Searching for Primaluna Prologue Three schematic
  65. JCM Build - Hum and Crackle
  66. Silvertone radio to Guitar Amp conversion question.
  67. Pentode Regulation Question
  68. pentodes with CCS load?
  69. Are these tube PCBs any good ?
  70. china 6L6 SEdiy
  71. What are your opinions of the ST-70 and St-120
  72. Baffle Step Compensation Tube Circuit
  73. 6L6 to 7027 cathode resistor value
  74. PCB to mount snapmout electrolytic capacitors
  75. Dared MC-7P Upgrades
  76. adapter to go from 6L6 to 807
  77. My Experience with a Jolida 202s (SoFar..)
  78. Cathodyne gain calculator link
  79. Dynakit ST-35?
  80. PSUD modeling old amp PS fails.
  81. Fisher 800 push-pull output stage not symmetrical. Why?
  82. Question of D3a driving 300B
  83. old console amp
  84. st35 vs millett DCPP vs tubelab simple SE
  85. New Tim Mellows OTL project
  86. Melted my mains transformer - Where to find replacement ?
  87. Strange.................
  88. Effect of high mains voltage?
  89. Kent SL 21 Tube head need help!!
  90. Hexfred or SIC rectifiers in choke supplies
  91. 'Strange' bass boost with impedance transformer
  92. Did my tubes go south ?
  93. Use of Tango NN-600-600 Transformers ?
  94. Anyone have an explanation for break(burn)in
  95. The Right Tube & TRannie
  96. 6SL7 / 6SN7 Phono
  97. Tube integrated amp in China.
  98. Power supply issues with Borbely style 12AU7/MOSFET hybrid
  99. heater elevation ground point
  100. Edison 12, can anyone help?
  101. Delay B+ using relay?
  102. New Schematic Linestage Tube Preamp using EF86 & 12AX7
  103. Phonostage (WAD clone) and 12B4A Preamp Build
  104. Interstage coupling feedback
  105. Just received a Yaqin MC-10T and have a couple of questions.
  106. Amplifier Troubleshooting
  107. Audio Preamplifier with PCC88
  108. Need Help With These TriodeDick Preamp Scematics
  109. I need help with my amp project
  110. Looking for unbalanced to balanced transformer
  111. Power Transformer Question
  112. My First Tube Amp Project S5 K-12G
  113. 6E2 vacuum tube compatibility
  114. Tube condenser microphone help!
  115. Audio transformer feedback loop
  116. yaqin vk amp without the loudness button uk version
  117. PP driver stage with local feedback
  118. Leader LAG-120B Audio Generator Manual Wanted
  119. Transformer brand question
  120. Single ended at 24Vcc 1+1W @ 8 ohm - three tubes
  121. EL41 PP power supply questions
  122. Reduce output on a ECC88CC class A pre-amp !
  123. SE OT impedance question
  124. DIY Tube amp book?
  125. 6P6P tubes?? will 6V6's work?
  126. RH84 amplifier build, but very weak distorted output
  127. Paralleling filament transformers
  128. 6ak5 triode mode disipation
  129. Equalize or Not Equilize when driving a tube amp ?
  130. How to retire from DIY and sell off all your workshop contents?
  131. New to tubes and diyaudio here, question about torrids and tube amps...
  132. PC Based Oscilliscope for Tube Curcuits
  133. Lamp in HV Centre Tap - why?
  134. EL156 PP
  135. 300B resistor
  136. Has anyone here bought from ussr-tubes.com ?
  137. Which cathode bypass capacitor?
  138. RIAA Schematic for-6SL7,7308 or?
  139. Chassis' for Tube Gear
  140. Convergent Audio Tech SL1 preamp
  141. Buy Them While You Can Not When You...
  142. Does anyone know of Thomas Martens?
  143. OTL for 40-80ohm speakers
  144. Morrison Dinosaur
  145. pcl86=14gw8 ??
  146. My little SE with GU50
  147. Source follower in a DC-coupled pp amp?
  148. Tube chassis for retail sale.
  149. Poor man's power supply
  150. High voltage driver for AB2 operation GU81m tubes
  151. 5AR4 rectified power supply question
  152. Direct Coupled Amp
  153. Is this EL84 kit from Germany worth fooling with?
  154. 6v6 PP Pentode mode
  155. 5 pin octal tube socket
  156. RCA Manual Typo?
  157. pete millet low mu preamp
  158. Capability to drive the 211 PP
  159. 6BG6G SE advice needed.
  160. Signal Generator: Which one to buy ? What to look for in a signal generator ?
  161. Power booster
  162. I've just build this steroe amplifier
  163. What amp to build? Push Pull, SE? thoughts?
  164. amp sounds bad- fatman itube 252
  165. 6C33 single ended class A2 (cathode network question)
  166. Sweet Peach EL34b Amp - Distortion?
  167. 6C33C socket types, where to buy?
  168. haedphone amp. using 6418< NEED HELP
  169. finished my 6au6/807 amplifier
  170. Thinking about building an S5 16LS 16W amp I've got some questions for the forum./
  171. Broskie "Unbalancer" - transformer specifications
  172. Tube chess.
  173. How Its Made - Vacuum Tubes
  174. Please help me understand power supply load
  175. 12AU7 - How absolute are maximum ratings?
  176. Tube rejuvination
  177. Article: Samsung brings back tubes in audio dock
  178. 1st build suggestions
  179. Parallel SE output
  180. Fixed Bias question
  181. vintage ua 610 schematic
  182. Which KT88 PP and which Transformers?
  183. Some more special small-signal tv tubes
  184. MR 67 Coupling Caps
  185. Help - YAQIN MS-20L schematic
  186. Power and Speaker cables
  187. v1 tube keeps going microphonic help! 5e3 build
  188. Leak TL12+ with triode mode EF86
  189. diy tube dampers
  190. VTVM troubleshooting help
  191. PP amp crossover distortion
  192. Sanity check please? ST-70(-ish) power supply
  193. Thoughts of apparent noise on ground - due to power tx?
  194. hybride circlotron
  195. Clone
  196. 8156 Beam Pentode Compactron
  197. DOUBLE TRIODE (6N16B)
  198. looking for Tube I/V analog for dac schematic ?
  199. NewBee PPEL84
  200. Whooaa! Now we're talking.
  201. Cinema Engineering AT-18
  202. Back from school
  203. Amp ideas for my spare 3.3k output transformers.
  204. HEllo and a few suggestions please
  205. 1SH24B Pre-Amp (or buffer?)
  206. Anode cap for GU 29 / QQE06/40
  207. Back to back autotransformers for B+?
  208. Sound Valves M60 schematics
  209. Volume Pot for RH84
  210. Mengyue mini el34b
  211. Which Chinese integrated tube amp have the power for Rock Song ?
  212. Help on transformers please
  213. 300B alternatives
  214. Anybody using a tube amp in their car?
  215. What is a KT88-98?
  216. 6au6 line stage a bad idea?
  217. Making a Kron tube
  218. AY Symphonies preamp
  219. Need to Upgrade Tube Preamp Volume Pot
  220. Tubelab Simple SE low B+
  221. Filament AC or DC?
  222. rasping sound from Dared VP-16
  223. Anyone have any "small signal" pentode models?
  224. Power amp distortion for modern amps
  225. Help with EL504-based amplifier
  226. Tubes: Are they worth it?
  227. Radio Shack Boston Monobloc (fuse question)
  228. 829B 3E29 Pentode PPP?
  229. Fixed Autobias?
  230. Best wishes
  231. Radiotron A504 amplifier schematic
  232. Blown power tube - a short story
  233. Hickok 752A calibration?
  234. replace EL34 with EL37 !?
  235. Mono push-pull driver PCB
  236. Magnavox 139AA schematics, info?
  237. Anyone knows what driver tube on DowdyLama's GM-70......
  238. Building an amp around the QB5/1750 transmitter tube
  239. Instrument amp from '59 Lowrey donor chassis.
  240. cascoded gyrator loaded 6H9C to low idle.
  241. vacuum tube DAC and connection
  242. Dynaco ST70 II Right Channel Out
  243. ST70 Inrush Issue
  244. ECC88 OTL heaphone amp
  245. Help with deciding to build or buy Tube amp.
  246. Luxman LV-105 static on on channel
  247. equivlent of FU-50
  248. placing the volume control
  249. PP 300B ''transformer coupled''
  250. My First Tube Preamp

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