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  1. Q: lifespan of JJ ECC99 tubes
  2. Cold solder joint?
  3. Input Impedance/Buffers
  4. Old capacitors..Comments..
  5. Shizuki capacitors?
  6. Spectrum Analyzer: What to get ? What to look for in a spectrum analyzer ?
  7. Amperex Orange Globe 12ax7 ,Brimar cv4004
  8. Question about transformer lamination stacking techniques
  9. line preamplifier with 6c10
  10. Homebrew Toroidal Output Transformer
  11. Line output tube
  12. MJK's SSSchadeode
  13. Any one know were to buy the fu-80 tube?
  14. Maida Regulator PCB
  15. Suggestions for 7k output transformers.
  16. Help: Fluke 87V Meter Calibration
  17. Searching for Primaluna Prologue Three schematic
  18. JCM Build - Hum and Crackle
  19. Silvertone radio to Guitar Amp conversion question.
  20. Pentode Regulation Question
  21. pentodes with CCS load?
  22. Are these tube PCBs any good ?
  23. china 6L6 SEdiy
  24. What are your opinions of the ST-70 and St-120
  25. Baffle Step Compensation Tube Circuit
  26. 6L6 to 7027 cathode resistor value
  27. PCB to mount snapmout electrolytic capacitors
  28. Dared MC-7P Upgrades
  29. adapter to go from 6L6 to 807
  30. My Experience with a Jolida 202s (SoFar..)
  31. Cathodyne gain calculator link
  32. Dynakit ST-35?
  33. PSUD modeling old amp PS fails.
  34. Fisher 800 push-pull output stage not symmetrical. Why?
  35. Question of D3a driving 300B
  36. old console amp
  37. st35 vs millett DCPP vs tubelab simple SE
  38. New Tim Mellows OTL project
  39. Melted my mains transformer - Where to find replacement ?
  40. Strange.................
  41. Effect of high mains voltage?
  42. Kent SL 21 Tube head need help!!
  43. Hexfred or SIC rectifiers in choke supplies
  44. 'Strange' bass boost with impedance transformer
  45. Did my tubes go south ?
  46. Use of Tango NN-600-600 Transformers ?
  47. Anyone have an explanation for break(burn)in
  48. The Right Tube & TRannie
  49. 6SL7 / 6SN7 Phono
  50. Tube integrated amp in China.
  51. Power supply issues with Borbely style 12AU7/MOSFET hybrid
  52. heater elevation ground point
  53. Edison 12, can anyone help?
  54. Delay B+ using relay?
  55. New Schematic Linestage Tube Preamp using EF86 & 12AX7
  56. Phonostage (WAD clone) and 12B4A Preamp Build
  57. Interstage coupling feedback
  58. Just received a Yaqin MC-10T and have a couple of questions.
  59. Amplifier Troubleshooting
  60. Audio Preamplifier with PCC88
  61. Need Help With These TriodeDick Preamp Scematics
  62. I need help with my amp project
  63. Looking for unbalanced to balanced transformer
  64. Power Transformer Question
  65. My First Tube Amp Project S5 K-12G
  66. 6E2 vacuum tube compatibility
  67. Tube condenser microphone help!
  68. Audio transformer feedback loop
  69. yaqin vk amp without the loudness button uk version
  70. PP driver stage with local feedback
  71. Leader LAG-120B Audio Generator Manual Wanted
  72. Transformer brand question
  73. Single ended at 24Vcc 1+1W @ 8 ohm - three tubes
  74. EL41 PP power supply questions
  75. Reduce output on a ECC88CC class A pre-amp !
  76. SE OT impedance question
  77. DIY Tube amp book?
  78. 6P6P tubes?? will 6V6's work?
  79. RH84 amplifier build, but very weak distorted output
  80. Paralleling filament transformers
  81. 6ak5 triode mode disipation
  82. Equalize or Not Equilize when driving a tube amp ?
  83. How to retire from DIY and sell off all your workshop contents?
  84. New to tubes and diyaudio here, question about torrids and tube amps...
  85. PC Based Oscilliscope for Tube Curcuits
  86. Lamp in HV Centre Tap - why?
  87. EL156 PP
  88. 300B resistor
  89. Has anyone here bought from ussr-tubes.com ?
  90. Which cathode bypass capacitor?
  91. RIAA Schematic for-6SL7,7308 or?
  92. Chassis' for Tube Gear
  93. Convergent Audio Tech SL1 preamp
  94. Buy Them While You Can Not When You...
  95. Does anyone know of Thomas Martens?
  96. OTL for 40-80ohm speakers
  97. Morrison Dinosaur
  98. pcl86=14gw8 ??
  99. My little SE with GU50
  100. Source follower in a DC-coupled pp amp?
  101. Tube chassis for retail sale.
  102. Poor man's power supply
  103. High voltage driver for AB2 operation GU81m tubes
  104. 5AR4 rectified power supply question
  105. Direct Coupled Amp
  106. Is this EL84 kit from Germany worth fooling with?
  107. 6v6 PP Pentode mode
  108. 5 pin octal tube socket
  109. RCA Manual Typo?
  110. pete millet low mu preamp
  111. Capability to drive the 211 PP
  112. 6BG6G SE advice needed.
  113. Signal Generator: Which one to buy ? What to look for in a signal generator ?
  114. Power booster
  115. I've just build this steroe amplifier
  116. What amp to build? Push Pull, SE? thoughts?
  117. amp sounds bad- fatman itube 252
  118. 6C33 single ended class A2 (cathode network question)
  119. Sweet Peach EL34b Amp - Distortion?
  120. 6C33C socket types, where to buy?
  121. haedphone amp. using 6418< NEED HELP
  122. finished my 6au6/807 amplifier
  123. Thinking about building an S5 16LS 16W amp I've got some questions for the forum./
  124. Broskie "Unbalancer" - transformer specifications
  125. Tube chess.
  126. How Its Made - Vacuum Tubes
  127. Please help me understand power supply load
  128. 12AU7 - How absolute are maximum ratings?
  129. Tube rejuvination
  130. Article: Samsung brings back tubes in audio dock
  131. 1st build suggestions
  132. Parallel SE output
  133. Fixed Bias question
  134. vintage ua 610 schematic
  135. Which KT88 PP and which Transformers?
  136. Some more special small-signal tv tubes
  137. MR 67 Coupling Caps
  138. Help - YAQIN MS-20L schematic
  139. Power and Speaker cables
  140. v1 tube keeps going microphonic help! 5e3 build
  141. Leak TL12+ with triode mode EF86
  142. diy tube dampers
  143. VTVM troubleshooting help
  144. PP amp crossover distortion
  145. Sanity check please? ST-70(-ish) power supply
  146. Thoughts of apparent noise on ground - due to power tx?
  147. hybride circlotron
  148. Clone
  149. 8156 Beam Pentode Compactron
  150. DOUBLE TRIODE (6N16B)
  151. looking for Tube I/V analog for dac schematic ?
  152. NewBee PPEL84
  153. Whooaa! Now we're talking.
  154. Cinema Engineering AT-18
  155. Back from school
  156. Amp ideas for my spare 3.3k output transformers.
  157. HEllo and a few suggestions please
  158. 1SH24B Pre-Amp (or buffer?)
  159. Anode cap for GU 29 / QQE06/40
  160. Back to back autotransformers for B+?
  161. Sound Valves M60 schematics
  162. Volume Pot for RH84
  163. Mengyue mini el34b
  164. Which Chinese integrated tube amp have the power for Rock Song ?
  165. Help on transformers please
  166. 300B alternatives
  167. Anybody using a tube amp in their car?
  168. What is a KT88-98?
  169. 6au6 line stage a bad idea?
  170. Making a Kron tube
  171. AY Symphonies preamp
  172. Need to Upgrade Tube Preamp Volume Pot
  173. Tubelab Simple SE low B+
  174. Filament AC or DC?
  175. rasping sound from Dared VP-16
  176. Anyone have any "small signal" pentode models?
  177. Power amp distortion for modern amps
  178. Help with EL504-based amplifier
  179. Tubes: Are they worth it?
  180. Radio Shack Boston Monobloc (fuse question)
  181. 829B 3E29 Pentode PPP?
  182. Fixed Autobias?
  183. Best wishes
  184. Radiotron A504 amplifier schematic
  185. Blown power tube - a short story
  186. Hickok 752A calibration?
  187. replace EL34 with EL37 !?
  188. Mono push-pull driver PCB
  189. Magnavox 139AA schematics, info?
  190. Anyone knows what driver tube on DowdyLama's GM-70......
  191. Building an amp around the QB5/1750 transmitter tube
  192. Instrument amp from '59 Lowrey donor chassis.
  193. cascoded gyrator loaded 6H9C to low idle.
  194. vacuum tube DAC and connection
  195. Dynaco ST70 II Right Channel Out
  196. ST70 Inrush Issue
  197. ECC88 OTL heaphone amp
  198. Help with deciding to build or buy Tube amp.
  199. Luxman LV-105 static on on channel
  200. equivlent of FU-50
  201. placing the volume control
  202. PP 300B ''transformer coupled''
  203. My First Tube Preamp
  204. Tube amp kit and speaker recommendations?
  205. First design GU81M SE triode
  206. Instruments & Amps forum - where is it?
  207. Power supply capacitor question for tubelab simple ss
  208. EL300 = 6FN5 / PL300 = 35FN5 tube
  209. 6U8 driving 45
  210. very low impedance white follower with 6H13C
  211. EL86 Any idea helps.
  212. 6112 and 6111 Mini-preamp
  213. Expert advice on what preamp to chose
  214. Harman Kardon DPR-7, Commander series pre/mixer
  215. input transformer - mumetal casing etc.
  216. Oil-filled caps: ASC versus Panasonic
  217. SOHA headphone amp
  218. Using a single triode as a .......
  219. Sonic Frontiers SFP-1 Phono Stage
  220. Help!! with attenuation.
  221. power up inrush current limiter - anyone using?
  222. Audioromy FU-29, Latest Model 828A Mini Review
  223. Vertical-deflection
  224. Drilling a hole
  225. Edcor CXPP25-MS-8K V Triode Z-565
  226. bad opt measured values
  227. Mu Follower Driver for Push-Pull
  228. Hickok 539 question...
  229. need datasheets for a phillips transformer if anyone has any
  230. Chicago power XFMR question.
  231. Coupling Capacitor - Pls Help
  232. Help please on Christmas gift
  233. Audio Note P-zero
  234. SE EL34 Schematic - What do you think?
  235. Playing with hybrid amp: SRPP + MOSFET
  236. 300B filament supply question
  237. KT88 Parallel Push Pull
  238. cheating life out of old tubes?
  239. dBu transformer ratings
  240. Dared MP-2a3c mods
  241. Output transformers (Wolpert)
  242. Using Mains Transformers as Outputs
  243. Tube just for show...
  244. first project - first post - poddwatt
  245. High power CCS
  246. Analog Summing
  247. My new el34 + 12ax7 VCT amp. (Need Ideas For my first headphone vacuum tube amp Too~)
  248. cascode tubes
  249. High Fidelity by Pilot (circa 1953)
  250. Hardware help please

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