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  1. Edcor CXSE25-8-2.5K single ended UL transformer
  2. Voltseconds ccs for the K-12 kit
  3. The Torpedo Parafeed Headphone Amplifier
  4. Tube Rectifiers do sound different
  5. 6922, a 6DJ8 replacement??
  6. QB2/250 amplifier
  7. WE 350B and 311A
  8. Single ended 300b's
  9. More power!
  10. How the magnetic affect the sound of tube amplifier
  11. Valves replacement for Copland CT402
  12. Changing valve damage
  13. Tube phono preamplifier by 12ax7
  14. Altec 353A oddity
  15. I need to lose that Hummmm
  16. Reduce B+ with zener
  17. Old Marshall plexi clone problem
  18. triode and pentode 6v6 in parallel
  19. How to make mic input transformer 150:50KCT for mic tube preamp???
  20. Webcor 12AU7 is it a Mullard?
  21. Everett AO48
  22. Resurrecting old tubes
  23. Lumley ST70 Output impedance change and other questions
  24. AC Heater reference to B+
  25. Two tube class a2 se trioded el84 with 12dw7 cathode follower driver?
  26. Overly complicated 1.6A CCS Heater Supply
  27. Hibryd amplifier with tube/valve ECC88 (PCC88) and chipamp LM1875
  28. Tube/Valve buffer with ECC88
  29. High(er) gm octal pentodes?
  30. Shielding Characteristics of Copper Clad PCB
  31. Starting a Meixing MC34-A07 modification project
  32. 6V SLA Dropping resistor for a 5VDC Filament Supply
  33. Wind (Thermionic?) noise, and other strange sounds
  34. Suggestions for an tube-amp with KT88
  35. SE-100 Golden Tube Audio - REPAIR
  36. Power amp vs preamp topology
  37. EL34 Characteristics for Ug2 400V
  38. old Heathkit amp
  39. Toroid OPT for 300B
  40. Help: Connecting two Fluke meters in series
  41. Preamp Volume Controls
  42. Output SE Transformer Question
  43. Vintage electrolytic capacitors
  44. Silver bearing grease for tube sockets
  45. Should I try adding a small Tube Preamp to a DTA-100?
  46. IS 6N6P A DIRECT REPLACEMENT FOR ECC88CC ?
  47. Dynaco stereo 70 look alike
  48. Vacuum Tube factory: For Sale!
  49. Does anybody know anything about this German console
  50. Heater dillema for multi chassis phono stage.
  51. Q: lifespan of JJ ECC99 tubes
  52. Cold solder joint?
  53. Input Impedance/Buffers
  54. Old capacitors..Comments..
  55. Shizuki capacitors?
  56. Spectrum Analyzer: What to get ? What to look for in a spectrum analyzer ?
  57. Amperex Orange Globe 12ax7 ,Brimar cv4004
  58. Question about transformer lamination stacking techniques
  59. line preamplifier with 6c10
  60. Homebrew Toroidal Output Transformer
  61. Line output tube
  62. MJK's SSSchadeode
  63. Any one know were to buy the fu-80 tube?
  64. Maida Regulator PCB
  65. Suggestions for 7k output transformers.
  66. Help: Fluke 87V Meter Calibration
  67. Searching for Primaluna Prologue Three schematic
  68. JCM Build - Hum and Crackle
  69. Silvertone radio to Guitar Amp conversion question.
  70. Pentode Regulation Question
  71. pentodes with CCS load?
  72. Are these tube PCBs any good ?
  73. china 6L6 SEdiy
  74. What are your opinions of the ST-70 and St-120
  75. Baffle Step Compensation Tube Circuit
  76. 6L6 to 7027 cathode resistor value
  77. PCB to mount snapmout electrolytic capacitors
  78. Dared MC-7P Upgrades
  79. adapter to go from 6L6 to 807
  80. My Experience with a Jolida 202s (SoFar..)
  81. Cathodyne gain calculator link
  82. Dynakit ST-35?
  83. PSUD modeling old amp PS fails.
  84. Fisher 800 push-pull output stage not symmetrical. Why?
  85. Question of D3a driving 300B
  86. old console amp
  87. st35 vs millett DCPP vs tubelab simple SE
  88. New Tim Mellows OTL project
  89. Melted my mains transformer - Where to find replacement ?
  90. Strange.................
  91. Effect of high mains voltage?
  92. Kent SL 21 Tube head need help!!
  93. Hexfred or SIC rectifiers in choke supplies
  94. 'Strange' bass boost with impedance transformer
  95. Did my tubes go south ?
  96. Use of Tango NN-600-600 Transformers ?
  97. Anyone have an explanation for break(burn)in
  98. The Right Tube & TRannie
  99. 6SL7 / 6SN7 Phono
  100. Tube integrated amp in China.
  101. Power supply issues with Borbely style 12AU7/MOSFET hybrid
  102. heater elevation ground point
  103. Edison 12, can anyone help?
  104. Delay B+ using relay?
  105. New Schematic Linestage Tube Preamp using EF86 & 12AX7
  106. Phonostage (WAD clone) and 12B4A Preamp Build
  107. Interstage coupling feedback
  108. Just received a Yaqin MC-10T and have a couple of questions.
  109. Amplifier Troubleshooting
  110. Audio Preamplifier with PCC88
  111. Need Help With These TriodeDick Preamp Scematics
  112. I need help with my amp project
  113. Looking for unbalanced to balanced transformer
  114. Power Transformer Question
  115. My First Tube Amp Project S5 K-12G
  116. 6E2 vacuum tube compatibility
  117. Tube condenser microphone help!
  118. Audio transformer feedback loop
  119. yaqin vk amp without the loudness button uk version
  120. PP driver stage with local feedback
  121. Leader LAG-120B Audio Generator Manual Wanted
  122. Transformer brand question
  123. Single ended at 24Vcc 1+1W @ 8 ohm - three tubes
  124. EL41 PP power supply questions
  125. Reduce output on a ECC88CC class A pre-amp !
  126. SE OT impedance question
  127. DIY Tube amp book?
  128. 6P6P tubes?? will 6V6's work?
  129. RH84 amplifier build, but very weak distorted output
  130. Paralleling filament transformers
  131. 6ak5 triode mode disipation
  132. Equalize or Not Equilize when driving a tube amp ?
  133. How to retire from DIY and sell off all your workshop contents?
  134. New to tubes and diyaudio here, question about torrids and tube amps...
  135. PC Based Oscilliscope for Tube Curcuits
  136. Lamp in HV Centre Tap - why?
  137. EL156 PP
  138. 300B resistor
  139. Has anyone here bought from ussr-tubes.com ?
  140. Which cathode bypass capacitor?
  141. RIAA Schematic for-6SL7,7308 or?
  142. Chassis' for Tube Gear
  143. Convergent Audio Tech SL1 preamp
  144. Buy Them While You Can Not When You...
  145. Does anyone know of Thomas Martens?
  146. OTL for 40-80ohm speakers
  147. Morrison Dinosaur
  148. pcl86=14gw8 ??
  149. My little SE with GU50
  150. Source follower in a DC-coupled pp amp?
  151. Tube chassis for retail sale.
  152. Poor man's power supply
  153. High voltage driver for AB2 operation GU81m tubes
  154. 5AR4 rectified power supply question
  155. Direct Coupled Amp
  156. Is this EL84 kit from Germany worth fooling with?
  157. 6v6 PP Pentode mode
  158. 5 pin octal tube socket
  159. RCA Manual Typo?
  160. pete millet low mu preamp
  161. Capability to drive the 211 PP
  162. 6BG6G SE advice needed.
  163. Signal Generator: Which one to buy ? What to look for in a signal generator ?
  164. Power booster
  165. I've just build this steroe amplifier
  166. What amp to build? Push Pull, SE? thoughts?
  167. amp sounds bad- fatman itube 252
  168. 6C33 single ended class A2 (cathode network question)
  169. Sweet Peach EL34b Amp - Distortion?
  170. 6C33C socket types, where to buy?
  171. haedphone amp. using 6418< NEED HELP
  172. finished my 6au6/807 amplifier
  173. Thinking about building an S5 16LS 16W amp I've got some questions for the forum./
  174. Broskie "Unbalancer" - transformer specifications
  175. Tube chess.
  176. How Its Made - Vacuum Tubes
  177. Please help me understand power supply load
  178. 12AU7 - How absolute are maximum ratings?
  179. Tube rejuvination
  180. Article: Samsung brings back tubes in audio dock
  181. 1st build suggestions
  182. Parallel SE output
  183. Fixed Bias question
  184. vintage ua 610 schematic
  185. Which KT88 PP and which Transformers?
  186. Some more special small-signal tv tubes
  187. MR 67 Coupling Caps
  188. Help - YAQIN MS-20L schematic
  189. Power and Speaker cables
  190. v1 tube keeps going microphonic help! 5e3 build
  191. Leak TL12+ with triode mode EF86
  192. diy tube dampers
  193. VTVM troubleshooting help
  194. PP amp crossover distortion
  195. Sanity check please? ST-70(-ish) power supply
  196. Thoughts of apparent noise on ground - due to power tx?
  197. hybride circlotron
  198. Clone
  199. 8156 Beam Pentode Compactron
  200. DOUBLE TRIODE (6N16B)
  201. looking for Tube I/V analog for dac schematic ?
  202. NewBee PPEL84
  203. Whooaa! Now we're talking.
  204. Cinema Engineering AT-18
  205. Back from school
  206. Amp ideas for my spare 3.3k output transformers.
  207. HEllo and a few suggestions please
  208. 1SH24B Pre-Amp (or buffer?)
  209. Anode cap for GU 29 / QQE06/40
  210. Back to back autotransformers for B+?
  211. Sound Valves M60 schematics
  212. Volume Pot for RH84
  213. Mengyue mini el34b
  214. Which Chinese integrated tube amp have the power for Rock Song ?
  215. Help on transformers please
  216. 300B alternatives
  217. Anybody using a tube amp in their car?
  218. What is a KT88-98?
  219. 6au6 line stage a bad idea?
  220. Making a Kron tube
  221. AY Symphonies preamp
  222. Need to Upgrade Tube Preamp Volume Pot
  223. Tubelab Simple SE low B+
  224. Filament AC or DC?
  225. rasping sound from Dared VP-16
  226. Anyone have any "small signal" pentode models?
  227. Power amp distortion for modern amps
  228. Help with EL504-based amplifier
  229. Tubes: Are they worth it?
  230. Radio Shack Boston Monobloc (fuse question)
  231. 829B 3E29 Pentode PPP?
  232. Fixed Autobias?
  233. Best wishes
  234. Radiotron A504 amplifier schematic
  235. Blown power tube - a short story
  236. Hickok 752A calibration?
  237. replace EL34 with EL37 !?
  238. Mono push-pull driver PCB
  239. Magnavox 139AA schematics, info?
  240. Anyone knows what driver tube on DowdyLama's GM-70......
  241. Building an amp around the QB5/1750 transmitter tube
  242. Instrument amp from '59 Lowrey donor chassis.
  243. cascoded gyrator loaded 6H9C to low idle.
  244. vacuum tube DAC and connection
  245. Dynaco ST70 II Right Channel Out
  246. ST70 Inrush Issue
  247. ECC88 OTL heaphone amp
  248. Help with deciding to build or buy Tube amp.
  249. Luxman LV-105 static on on channel
  250. equivlent of FU-50

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