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  1. More power!
  2. How the magnetic affect the sound of tube amplifier
  3. Valves replacement for Copland CT402
  4. Changing valve damage
  5. Tube phono preamplifier by 12ax7
  6. Altec 353A oddity
  7. I need to lose that Hummmm
  8. Reduce B+ with zener
  9. Old Marshall plexi clone problem
  10. triode and pentode 6v6 in parallel
  11. How to make mic input transformer 150:50KCT for mic tube preamp???
  12. Webcor 12AU7 is it a Mullard?
  13. Everett AO48
  14. Resurrecting old tubes
  15. Lumley ST70 Output impedance change and other questions
  16. AC Heater reference to B+
  17. Two tube class a2 se trioded el84 with 12dw7 cathode follower driver?
  18. Overly complicated 1.6A CCS Heater Supply
  19. Hibryd amplifier with tube/valve ECC88 (PCC88) and chipamp LM1875
  20. Tube/Valve buffer with ECC88
  21. High(er) gm octal pentodes?
  22. Shielding Characteristics of Copper Clad PCB
  23. Starting a Meixing MC34-A07 modification project
  24. 6V SLA Dropping resistor for a 5VDC Filament Supply
  25. Wind (Thermionic?) noise, and other strange sounds
  26. Suggestions for an tube-amp with KT88
  27. SE-100 Golden Tube Audio - REPAIR
  28. Power amp vs preamp topology
  29. EL34 Characteristics for Ug2 400V
  30. old Heathkit amp
  31. Toroid OPT for 300B
  32. Help: Connecting two Fluke meters in series
  33. Preamp Volume Controls
  34. Output SE Transformer Question
  35. Vintage electrolytic capacitors
  36. Silver bearing grease for tube sockets
  37. Should I try adding a small Tube Preamp to a DTA-100?
  38. IS 6N6P A DIRECT REPLACEMENT FOR ECC88CC ?
  39. Dynaco stereo 70 look alike
  40. Vacuum Tube factory: For Sale!
  41. Does anybody know anything about this German console
  42. Heater dillema for multi chassis phono stage.
  43. Q: lifespan of JJ ECC99 tubes
  44. Cold solder joint?
  45. Input Impedance/Buffers
  46. Old capacitors..Comments..
  47. Shizuki capacitors?
  48. Spectrum Analyzer: What to get ? What to look for in a spectrum analyzer ?
  49. Amperex Orange Globe 12ax7 ,Brimar cv4004
  50. Question about transformer lamination stacking techniques
  51. line preamplifier with 6c10
  52. Homebrew Toroidal Output Transformer
  53. Line output tube
  54. MJK's SSSchadeode
  55. Any one know were to buy the fu-80 tube?
  56. Maida Regulator PCB
  57. Suggestions for 7k output transformers.
  58. Help: Fluke 87V Meter Calibration
  59. Searching for Primaluna Prologue Three schematic
  60. JCM Build - Hum and Crackle
  61. Silvertone radio to Guitar Amp conversion question.
  62. Pentode Regulation Question
  63. pentodes with CCS load?
  64. Are these tube PCBs any good ?
  65. china 6L6 SEdiy
  66. What are your opinions of the ST-70 and St-120
  67. Baffle Step Compensation Tube Circuit
  68. 6L6 to 7027 cathode resistor value
  69. PCB to mount snapmout electrolytic capacitors
  70. Dared MC-7P Upgrades
  71. adapter to go from 6L6 to 807
  72. My Experience with a Jolida 202s (SoFar..)
  73. Cathodyne gain calculator link
  74. Dynakit ST-35?
  75. PSUD modeling old amp PS fails.
  76. Fisher 800 push-pull output stage not symmetrical. Why?
  77. Question of D3a driving 300B
  78. old console amp
  79. st35 vs millett DCPP vs tubelab simple SE
  80. New Tim Mellows OTL project
  81. Melted my mains transformer - Where to find replacement ?
  82. Strange.................
  83. Effect of high mains voltage?
  84. Kent SL 21 Tube head need help!!
  85. Hexfred or SIC rectifiers in choke supplies
  86. 'Strange' bass boost with impedance transformer
  87. Did my tubes go south ?
  88. Use of Tango NN-600-600 Transformers ?
  89. Anyone have an explanation for break(burn)in
  90. The Right Tube & TRannie
  91. 6SL7 / 6SN7 Phono
  92. Tube integrated amp in China.
  93. Power supply issues with Borbely style 12AU7/MOSFET hybrid
  94. heater elevation ground point
  95. Edison 12, can anyone help?
  96. Delay B+ using relay?
  97. New Schematic Linestage Tube Preamp using EF86 & 12AX7
  98. Phonostage (WAD clone) and 12B4A Preamp Build
  99. Interstage coupling feedback
  100. Just received a Yaqin MC-10T and have a couple of questions.
  101. Amplifier Troubleshooting
  102. Audio Preamplifier with PCC88
  103. Need Help With These TriodeDick Preamp Scematics
  104. I need help with my amp project
  105. Looking for unbalanced to balanced transformer
  106. Power Transformer Question
  107. My First Tube Amp Project S5 K-12G
  108. 6E2 vacuum tube compatibility
  109. Tube condenser microphone help!
  110. Audio transformer feedback loop
  111. yaqin vk amp without the loudness button uk version
  112. PP driver stage with local feedback
  113. Leader LAG-120B Audio Generator Manual Wanted
  114. Transformer brand question
  115. Single ended at 24Vcc 1+1W @ 8 ohm - three tubes
  116. EL41 PP power supply questions
  117. Reduce output on a ECC88CC class A pre-amp !
  118. SE OT impedance question
  119. DIY Tube amp book?
  120. 6P6P tubes?? will 6V6's work?
  121. RH84 amplifier build, but very weak distorted output
  122. Paralleling filament transformers
  123. 6ak5 triode mode disipation
  124. Equalize or Not Equilize when driving a tube amp ?
  125. How to retire from DIY and sell off all your workshop contents?
  126. New to tubes and diyaudio here, question about torrids and tube amps...
  127. PC Based Oscilliscope for Tube Curcuits
  128. Lamp in HV Centre Tap - why?
  129. EL156 PP
  130. 300B resistor
  131. Has anyone here bought from ussr-tubes.com ?
  132. Which cathode bypass capacitor?
  133. RIAA Schematic for-6SL7,7308 or?
  134. Chassis' for Tube Gear
  135. Convergent Audio Tech SL1 preamp
  136. Buy Them While You Can Not When You...
  137. Does anyone know of Thomas Martens?
  138. OTL for 40-80ohm speakers
  139. Morrison Dinosaur
  140. pcl86=14gw8 ??
  141. My little SE with GU50
  142. Source follower in a DC-coupled pp amp?
  143. Tube chassis for retail sale.
  144. Poor man's power supply
  145. High voltage driver for AB2 operation GU81m tubes
  146. 5AR4 rectified power supply question
  147. Direct Coupled Amp
  148. Is this EL84 kit from Germany worth fooling with?
  149. 6v6 PP Pentode mode
  150. 5 pin octal tube socket
  151. RCA Manual Typo?
  152. pete millet low mu preamp
  153. Capability to drive the 211 PP
  154. 6BG6G SE advice needed.
  155. Signal Generator: Which one to buy ? What to look for in a signal generator ?
  156. Power booster
  157. I've just build this steroe amplifier
  158. What amp to build? Push Pull, SE? thoughts?
  159. amp sounds bad- fatman itube 252
  160. 6C33 single ended class A2 (cathode network question)
  161. Sweet Peach EL34b Amp - Distortion?
  162. 6C33C socket types, where to buy?
  163. haedphone amp. using 6418< NEED HELP
  164. finished my 6au6/807 amplifier
  165. Thinking about building an S5 16LS 16W amp I've got some questions for the forum./
  166. Broskie "Unbalancer" - transformer specifications
  167. Tube chess.
  168. How Its Made - Vacuum Tubes
  169. Please help me understand power supply load
  170. 12AU7 - How absolute are maximum ratings?
  171. Tube rejuvination
  172. Article: Samsung brings back tubes in audio dock
  173. 1st build suggestions
  174. Parallel SE output
  175. Fixed Bias question
  176. vintage ua 610 schematic
  177. Which KT88 PP and which Transformers?
  178. Some more special small-signal tv tubes
  179. MR 67 Coupling Caps
  180. Help - YAQIN MS-20L schematic
  181. Power and Speaker cables
  182. v1 tube keeps going microphonic help! 5e3 build
  183. Leak TL12+ with triode mode EF86
  184. diy tube dampers
  185. VTVM troubleshooting help
  186. PP amp crossover distortion
  187. Sanity check please? ST-70(-ish) power supply
  188. Thoughts of apparent noise on ground - due to power tx?
  189. hybride circlotron
  190. Clone
  191. 8156 Beam Pentode Compactron
  192. DOUBLE TRIODE (6N16B)
  193. looking for Tube I/V analog for dac schematic ?
  194. NewBee PPEL84
  195. Whooaa! Now we're talking.
  196. Cinema Engineering AT-18
  197. Back from school
  198. Amp ideas for my spare 3.3k output transformers.
  199. HEllo and a few suggestions please
  200. 1SH24B Pre-Amp (or buffer?)
  201. Anode cap for GU 29 / QQE06/40
  202. Back to back autotransformers for B+?
  203. Sound Valves M60 schematics
  204. Volume Pot for RH84
  205. Mengyue mini el34b
  206. Which Chinese integrated tube amp have the power for Rock Song ?
  207. Help on transformers please
  208. 300B alternatives
  209. Anybody using a tube amp in their car?
  210. What is a KT88-98?
  211. 6au6 line stage a bad idea?
  212. Making a Kron tube
  213. AY Symphonies preamp
  214. Need to Upgrade Tube Preamp Volume Pot
  215. Tubelab Simple SE low B+
  216. Filament AC or DC?
  217. rasping sound from Dared VP-16
  218. Anyone have any "small signal" pentode models?
  219. Power amp distortion for modern amps
  220. Help with EL504-based amplifier
  221. Tubes: Are they worth it?
  222. Radio Shack Boston Monobloc (fuse question)
  223. 829B 3E29 Pentode PPP?
  224. Fixed Autobias?
  225. Best wishes
  226. Radiotron A504 amplifier schematic
  227. Blown power tube - a short story
  228. Hickok 752A calibration?
  229. replace EL34 with EL37 !?
  230. Mono push-pull driver PCB
  231. Magnavox 139AA schematics, info?
  232. Anyone knows what driver tube on DowdyLama's GM-70......
  233. Building an amp around the QB5/1750 transmitter tube
  234. Instrument amp from '59 Lowrey donor chassis.
  235. cascoded gyrator loaded 6H9C to low idle.
  236. vacuum tube DAC and connection
  237. Dynaco ST70 II Right Channel Out
  238. ST70 Inrush Issue
  239. ECC88 OTL heaphone amp
  240. Help with deciding to build or buy Tube amp.
  241. Luxman LV-105 static on on channel
  242. equivlent of FU-50
  243. placing the volume control
  244. PP 300B ''transformer coupled''
  245. My First Tube Preamp
  246. Tube amp kit and speaker recommendations?
  247. First design GU81M SE triode
  248. Instruments & Amps forum - where is it?
  249. Power supply capacitor question for tubelab simple ss
  250. EL300 = 6FN5 / PL300 = 35FN5 tube

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