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  1. Overly complicated 1.6A CCS Heater Supply
  2. Hibryd amplifier with tube/valve ECC88 (PCC88) and chipamp LM1875
  3. Tube/Valve buffer with ECC88
  4. High(er) gm octal pentodes?
  5. Shielding Characteristics of Copper Clad PCB
  6. Starting a Meixing MC34-A07 modification project
  7. 6V SLA Dropping resistor for a 5VDC Filament Supply
  8. Wind (Thermionic?) noise, and other strange sounds
  9. Suggestions for an tube-amp with KT88
  10. SE-100 Golden Tube Audio - REPAIR
  11. Power amp vs preamp topology
  12. EL34 Characteristics for Ug2 400V
  13. old Heathkit amp
  14. Toroid OPT for 300B
  15. Help: Connecting two Fluke meters in series
  16. Preamp Volume Controls
  17. Output SE Transformer Question
  18. Silver bearing grease for tube sockets
  19. Should I try adding a small Tube Preamp to a DTA-100?
  20. IS 6N6P A DIRECT REPLACEMENT FOR ECC88CC ?
  21. Dynaco stereo 70 look alike
  22. Vacuum Tube factory: For Sale!
  23. Does anybody know anything about this German console
  24. Heater dillema for multi chassis phono stage.
  25. Q: lifespan of JJ ECC99 tubes
  26. Cold solder joint?
  27. Input Impedance/Buffers
  28. Old capacitors..Comments..
  29. Shizuki capacitors?
  30. Spectrum Analyzer: What to get ? What to look for in a spectrum analyzer ?
  31. Amperex Orange Globe 12ax7 ,Brimar cv4004
  32. Question about transformer lamination stacking techniques
  33. line preamplifier with 6c10
  34. Homebrew Toroidal Output Transformer
  35. Line output tube
  36. MJK's SSSchadeode
  37. Any one know were to buy the fu-80 tube?
  38. Maida Regulator PCB
  39. Suggestions for 7k output transformers.
  40. Help: Fluke 87V Meter Calibration
  41. Searching for Primaluna Prologue Three schematic
  42. Pentode Regulation Question
  43. pentodes with CCS load?
  44. Are these tube PCBs any good ?
  45. china 6L6 SEdiy
  46. What are your opinions of the ST-70 and St-120
  47. Baffle Step Compensation Tube Circuit
  48. 6L6 to 7027 cathode resistor value
  49. Dared MC-7P Upgrades
  50. adapter to go from 6L6 to 807
  51. My Experience with a Jolida 202s (SoFar..)
  52. Cathodyne gain calculator link
  53. Dynakit ST-35?
  54. PSUD modeling old amp PS fails.
  55. Fisher 800 push-pull output stage not symmetrical. Why?
  56. Question of D3a driving 300B
  57. old console amp
  58. New Tim Mellows OTL project
  59. Melted my mains transformer - Where to find replacement ?
  60. Strange.................
  61. Effect of high mains voltage?
  62. Kent SL 21 Tube head need help!!
  63. Hexfred or SIC rectifiers in choke supplies
  64. 'Strange' bass boost with impedance transformer
  65. Did my tubes go south ?
  66. Use of Tango NN-600-600 Transformers ?
  67. Anyone have an explanation for break(burn)in
  68. The Right Tube & TRannie
  69. 6SL7 / 6SN7 Phono
  70. Tube integrated amp in China.
  71. Power supply issues with Borbely style 12AU7/MOSFET hybrid
  72. heater elevation ground point
  73. Edison 12, can anyone help?
  74. Delay B+ using relay?
  75. New Schematic Linestage Tube Preamp using EF86 & 12AX7
  76. Phonostage (WAD clone) and 12B4A Preamp Build
  77. Interstage coupling feedback
  78. Just received a Yaqin MC-10T and have a couple of questions.
  79. Amplifier Troubleshooting
  80. Audio Preamplifier with PCC88
  81. Need Help With These TriodeDick Preamp Scematics
  82. I need help with my amp project
  83. Looking for unbalanced to balanced transformer
  84. Power Transformer Question
  85. My First Tube Amp Project S5 K-12G
  86. 6E2 vacuum tube compatibility
  87. Tube condenser microphone help!
  88. Audio transformer feedback loop
  89. yaqin vk amp without the loudness button uk version
  90. PP driver stage with local feedback
  91. Leader LAG-120B Audio Generator Manual Wanted
  92. Transformer brand question
  93. Single ended at 24Vcc 1+1W @ 8 ohm - three tubes
  94. EL41 PP power supply questions
  95. Reduce output on a ECC88CC class A pre-amp !
  96. SE OT impedance question
  97. DIY Tube amp book?
  98. 6P6P tubes?? will 6V6's work?
  99. RH84 amplifier build, but very weak distorted output
  100. Paralleling filament transformers
  101. 6ak5 triode mode disipation
  102. Equalize or Not Equilize when driving a tube amp ?
  103. How to retire from DIY and sell off all your workshop contents?
  104. New to tubes and diyaudio here, question about torrids and tube amps...
  105. PC Based Oscilliscope for Tube Curcuits
  106. Lamp in HV Centre Tap - why?
  107. EL156 PP
  108. Has anyone here bought from ussr-tubes.com ?
  109. Which cathode bypass capacitor?
  110. RIAA Schematic for-6SL7,7308 or?
  111. Chassis' for Tube Gear
  112. Convergent Audio Tech SL1 preamp
  113. Buy Them While You Can Not When You...
  114. Does anyone know of Thomas Martens?
  115. OTL for 40-80ohm speakers
  116. Morrison Dinosaur
  117. pcl86=14gw8 ??
  118. My little SE with GU50
  119. Source follower in a DC-coupled pp amp?
  120. Tube chassis for retail sale.
  121. Poor man's power supply
  122. High voltage driver for AB2 operation GU81m tubes
  123. 5AR4 rectified power supply question
  124. Direct Coupled Amp
  125. Is this EL84 kit from Germany worth fooling with?
  126. 6v6 PP Pentode mode
  127. 5 pin octal tube socket
  128. RCA Manual Typo?
  129. pete millet low mu preamp
  130. Capability to drive the 211 PP
  131. 6BG6G SE advice needed.
  132. Signal Generator: Which one to buy ? What to look for in a signal generator ?
  133. Power booster
  134. I've just build this steroe amplifier
  135. What amp to build? Push Pull, SE? thoughts?
  136. amp sounds bad- fatman itube 252
  137. 6C33 single ended class A2 (cathode network question)
  138. Sweet Peach EL34b Amp - Distortion?
  139. 6C33C socket types, where to buy?
  140. haedphone amp. using 6418< NEED HELP
  141. finished my 6au6/807 amplifier
  142. Thinking about building an S5 16LS 16W amp I've got some questions for the forum./
  143. Broskie "Unbalancer" - transformer specifications
  144. Tube chess.
  145. How Its Made - Vacuum Tubes
  146. Please help me understand power supply load
  147. 12AU7 - How absolute are maximum ratings?
  148. Tube rejuvination
  149. Article: Samsung brings back tubes in audio dock
  150. 1st build suggestions
  151. Parallel SE output
  152. Fixed Bias question
  153. vintage ua 610 schematic
  154. Which KT88 PP and which Transformers?
  155. Some more special small-signal tv tubes
  156. Help - YAQIN MS-20L schematic
  157. Power and Speaker cables
  158. Leak TL12+ with triode mode EF86
  159. diy tube dampers
  160. VTVM troubleshooting help
  161. PP amp crossover distortion
  162. Sanity check please? ST-70(-ish) power supply
  163. Thoughts of apparent noise on ground - due to power tx?
  164. hybride circlotron
  165. Clone
  166. 8156 Beam Pentode Compactron
  167. DOUBLE TRIODE (6N16B)
  168. looking for Tube I/V analog for dac schematic ?
  169. NewBee PPEL84
  170. Whooaa! Now we're talking.
  171. Cinema Engineering AT-18
  172. Back from school
  173. Amp ideas for my spare 3.3k output transformers.
  174. HEllo and a few suggestions please
  175. 1SH24B Pre-Amp (or buffer?)
  176. Anode cap for GU 29 / QQE06/40
  177. Back to back autotransformers for B+?
  178. Sound Valves M60 schematics
  179. Volume Pot for RH84
  180. Mengyue mini el34b
  181. Which Chinese integrated tube amp have the power for Rock Song ?
  182. Help on transformers please
  183. 300B alternatives
  184. Anybody using a tube amp in their car?
  185. What is a KT88-98?
  186. 6au6 line stage a bad idea?
  187. Making a Kron tube
  188. AY Symphonies preamp
  189. Need to Upgrade Tube Preamp Volume Pot
  190. Filament AC or DC?
  191. rasping sound from Dared VP-16
  192. Anyone have any "small signal" pentode models?
  193. Power amp distortion for modern amps
  194. Help with EL504-based amplifier
  195. Tubes: Are they worth it?
  196. Radio Shack Boston Monobloc (fuse question)
  197. 829B 3E29 Pentode PPP?
  198. Fixed Autobias?
  199. Best wishes
  200. Radiotron A504 amplifier schematic
  201. Blown power tube - a short story
  202. replace EL34 with EL37 !?
  203. Mono push-pull driver PCB
  204. Magnavox 139AA schematics, info?
  205. Anyone knows what driver tube on DowdyLama's GM-70......
  206. Building an amp around the QB5/1750 transmitter tube
  207. Instrument amp from '59 Lowrey donor chassis.
  208. cascoded gyrator loaded 6H9C to low idle.
  209. vacuum tube DAC and connection
  210. Dynaco ST70 II Right Channel Out
  211. ST70 Inrush Issue
  212. ECC88 OTL heaphone amp
  213. Help with deciding to build or buy Tube amp.
  214. Luxman LV-105 static on on channel
  215. equivlent of FU-50
  216. placing the volume control
  217. PP 300B ''transformer coupled''
  218. My First Tube Preamp
  219. Tube amp kit and speaker recommendations?
  220. First design GU81M SE triode
  221. Instruments & Amps forum - where is it?
  222. EL300 = 6FN5 / PL300 = 35FN5 tube
  223. 6U8 driving 45
  224. very low impedance white follower with 6H13C
  225. EL86 Any idea helps.
  226. 6112 and 6111 Mini-preamp
  227. Expert advice on what preamp to chose
  228. Harman Kardon DPR-7, Commander series pre/mixer
  229. input transformer - mumetal casing etc.
  230. SOHA headphone amp
  231. Using a single triode as a .......
  232. Sonic Frontiers SFP-1 Phono Stage
  233. Help!! with attenuation.
  234. power up inrush current limiter - anyone using?
  235. Audioromy FU-29, Latest Model 828A Mini Review
  236. Vertical-deflection
  237. Drilling a hole
  238. Edcor CXPP25-MS-8K V Triode Z-565
  239. bad opt measured values
  240. Mu Follower Driver for Push-Pull
  241. need datasheets for a phillips transformer if anyone has any
  242. Chicago power XFMR question.
  243. Help please on Christmas gift
  244. Audio Note P-zero
  245. SE EL34 Schematic - What do you think?
  246. Playing with hybrid amp: SRPP + MOSFET
  247. 300B filament supply question
  248. KT88 Parallel Push Pull
  249. cheating life out of old tubes?
  250. dBu transformer ratings

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