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  1. Hexfred or SIC rectifiers in choke supplies
  2. 'Strange' bass boost with impedance transformer
  3. Did my tubes go south ?
  4. Use of Tango NN-600-600 Transformers ?
  5. Anyone have an explanation for break(burn)in
  6. The Right Tube & TRannie
  7. 6SL7 / 6SN7 Phono
  8. Tube integrated amp in China.
  9. Power supply issues with Borbely style 12AU7/MOSFET hybrid
  10. heater elevation ground point
  11. Edison 12, can anyone help?
  12. Delay B+ using relay?
  13. New Schematic Linestage Tube Preamp using EF86 & 12AX7
  14. Phonostage (WAD clone) and 12B4A Preamp Build
  15. Interstage coupling feedback
  16. Just received a Yaqin MC-10T and have a couple of questions.
  17. Amplifier Troubleshooting
  18. Audio Preamplifier with PCC88
  19. Need Help With These TriodeDick Preamp Scematics
  20. I need help with my amp project
  21. Looking for unbalanced to balanced transformer
  22. Power Transformer Question
  23. My First Tube Amp Project S5 K-12G
  24. 6E2 vacuum tube compatibility
  25. Tube condenser microphone help!
  26. Audio transformer feedback loop
  27. yaqin vk amp without the loudness button uk version
  28. PP driver stage with local feedback
  29. Leader LAG-120B Audio Generator Manual Wanted
  30. Transformer brand question
  31. Single ended at 24Vcc 1+1W @ 8 ohm - three tubes
  32. EL41 PP power supply questions
  33. Reduce output on a ECC88CC class A pre-amp !
  34. SE OT impedance question
  35. DIY Tube amp book?
  36. 6P6P tubes?? will 6V6's work?
  37. RH84 amplifier build, but very weak distorted output
  38. Paralleling filament transformers
  39. 6ak5 triode mode disipation
  40. Equalize or Not Equilize when driving a tube amp ?
  41. How to retire from DIY and sell off all your workshop contents?
  42. New to tubes and diyaudio here, question about torrids and tube amps...
  43. PC Based Oscilliscope for Tube Curcuits
  44. Lamp in HV Centre Tap - why?
  45. EL156 PP
  46. 300B resistor
  47. Has anyone here bought from ussr-tubes.com ?
  48. Which cathode bypass capacitor?
  49. RIAA Schematic for-6SL7,7308 or?
  50. Chassis' for Tube Gear
  51. Convergent Audio Tech SL1 preamp
  52. Buy Them While You Can Not When You...
  53. Does anyone know of Thomas Martens?
  54. OTL for 40-80ohm speakers
  55. Morrison Dinosaur
  56. pcl86=14gw8 ??
  57. My little SE with GU50
  58. Source follower in a DC-coupled pp amp?
  59. Tube chassis for retail sale.
  60. Poor man's power supply
  61. High voltage driver for AB2 operation GU81m tubes
  62. 5AR4 rectified power supply question
  63. Direct Coupled Amp
  64. Is this EL84 kit from Germany worth fooling with?
  65. 6v6 PP Pentode mode
  66. 5 pin octal tube socket
  67. RCA Manual Typo?
  68. pete millet low mu preamp
  69. Capability to drive the 211 PP
  70. 6BG6G SE advice needed.
  71. Signal Generator: Which one to buy ? What to look for in a signal generator ?
  72. Power booster
  73. I've just build this steroe amplifier
  74. What amp to build? Push Pull, SE? thoughts?
  75. amp sounds bad- fatman itube 252
  76. 6C33 single ended class A2 (cathode network question)
  77. Sweet Peach EL34b Amp - Distortion?
  78. 6C33C socket types, where to buy?
  79. haedphone amp. using 6418< NEED HELP
  80. finished my 6au6/807 amplifier
  81. Thinking about building an S5 16LS 16W amp I've got some questions for the forum./
  82. Broskie "Unbalancer" - transformer specifications
  83. Tube chess.
  84. How Its Made - Vacuum Tubes
  85. Please help me understand power supply load
  86. 12AU7 - How absolute are maximum ratings?
  87. Tube rejuvination
  88. Article: Samsung brings back tubes in audio dock
  89. 1st build suggestions
  90. Parallel SE output
  91. Fixed Bias question
  92. vintage ua 610 schematic
  93. Which KT88 PP and which Transformers?
  94. Some more special small-signal tv tubes
  95. MR 67 Coupling Caps
  96. Help - YAQIN MS-20L schematic
  97. Power and Speaker cables
  98. v1 tube keeps going microphonic help! 5e3 build
  99. Leak TL12+ with triode mode EF86
  100. diy tube dampers
  101. VTVM troubleshooting help
  102. PP amp crossover distortion
  103. Sanity check please? ST-70(-ish) power supply
  104. Thoughts of apparent noise on ground - due to power tx?
  105. hybride circlotron
  106. Clone
  107. 8156 Beam Pentode Compactron
  108. DOUBLE TRIODE (6N16B)
  109. looking for Tube I/V analog for dac schematic ?
  110. NewBee PPEL84
  111. Whooaa! Now we're talking.
  112. Cinema Engineering AT-18
  113. Back from school
  114. Amp ideas for my spare 3.3k output transformers.
  115. HEllo and a few suggestions please
  116. 1SH24B Pre-Amp (or buffer?)
  117. Anode cap for GU 29 / QQE06/40
  118. Back to back autotransformers for B+?
  119. Sound Valves M60 schematics
  120. Volume Pot for RH84
  121. Mengyue mini el34b
  122. Which Chinese integrated tube amp have the power for Rock Song ?
  123. Help on transformers please
  124. 300B alternatives
  125. Anybody using a tube amp in their car?
  126. What is a KT88-98?
  127. 6au6 line stage a bad idea?
  128. Making a Kron tube
  129. AY Symphonies preamp
  130. Need to Upgrade Tube Preamp Volume Pot
  131. Tubelab Simple SE low B+
  132. Filament AC or DC?
  133. rasping sound from Dared VP-16
  134. Anyone have any "small signal" pentode models?
  135. Power amp distortion for modern amps
  136. Help with EL504-based amplifier
  137. Tubes: Are they worth it?
  138. Radio Shack Boston Monobloc (fuse question)
  139. 829B 3E29 Pentode PPP?
  140. Fixed Autobias?
  141. Best wishes
  142. Radiotron A504 amplifier schematic
  143. Blown power tube - a short story
  144. Hickok 752A calibration?
  145. replace EL34 with EL37 !?
  146. Mono push-pull driver PCB
  147. Magnavox 139AA schematics, info?
  148. Anyone knows what driver tube on DowdyLama's GM-70......
  149. Building an amp around the QB5/1750 transmitter tube
  150. Instrument amp from '59 Lowrey donor chassis.
  151. cascoded gyrator loaded 6H9C to low idle.
  152. vacuum tube DAC and connection
  153. Dynaco ST70 II Right Channel Out
  154. ST70 Inrush Issue
  155. ECC88 OTL heaphone amp
  156. Help with deciding to build or buy Tube amp.
  157. Luxman LV-105 static on on channel
  158. equivlent of FU-50
  159. placing the volume control
  160. PP 300B ''transformer coupled''
  161. My First Tube Preamp
  162. Tube amp kit and speaker recommendations?
  163. First design GU81M SE triode
  164. Instruments & Amps forum - where is it?
  165. Power supply capacitor question for tubelab simple ss
  166. EL300 = 6FN5 / PL300 = 35FN5 tube
  167. 6U8 driving 45
  168. very low impedance white follower with 6H13C
  169. EL86 Any idea helps.
  170. 6112 and 6111 Mini-preamp
  171. Expert advice on what preamp to chose
  172. Harman Kardon DPR-7, Commander series pre/mixer
  173. input transformer - mumetal casing etc.
  174. Oil-filled caps: ASC versus Panasonic
  175. SOHA headphone amp
  176. Using a single triode as a .......
  177. Sonic Frontiers SFP-1 Phono Stage
  178. Help!! with attenuation.
  179. power up inrush current limiter - anyone using?
  180. Audioromy FU-29, Latest Model 828A Mini Review
  181. Vertical-deflection
  182. Drilling a hole
  183. Edcor CXPP25-MS-8K V Triode Z-565
  184. bad opt measured values
  185. Mu Follower Driver for Push-Pull
  186. Hickok 539 question...
  187. need datasheets for a phillips transformer if anyone has any
  188. Chicago power XFMR question.
  189. Coupling Capacitor - Pls Help
  190. Help please on Christmas gift
  191. Audio Note P-zero
  192. SE EL34 Schematic - What do you think?
  193. Playing with hybrid amp: SRPP + MOSFET
  194. 300B filament supply question
  195. KT88 Parallel Push Pull
  196. cheating life out of old tubes?
  197. dBu transformer ratings
  198. Dared MP-2a3c mods
  199. Output transformers (Wolpert)
  200. Using Mains Transformers as Outputs
  201. Tube just for show...
  202. first project - first post - poddwatt
  203. High power CCS
  204. Analog Summing
  205. My new el34 + 12ax7 VCT amp. (Need Ideas For my first headphone vacuum tube amp Too~)
  206. cascode tubes
  207. High Fidelity by Pilot (circa 1953)
  208. Hardware help please
  209. integrated amps 100 per channel
  210. KT88 mounting question
  211. Output Transformer question
  212. Angstrom Thermionic
  213. ECC88 tube buffer NEEDED !
  214. Marshall 8080, missing components
  215. Paralell SE 807 Amp design
  216. Putting together a tweaker friendly amplifier!
  217. Tube chassis
  218. DHT headphone Hybrid-CF+
  219. Looking for specs on this Beyer Xfmr
  220. Resistors for Berning EA-2101?
  221. Uneven Plate Glow
  222. Parafeed transformer sounds thin
  223. Lightbulbs as ccs
  224. My AWESOME First DIY amp
  225. Cary audio design SLI 80
  226. A1538 OPT?
  227. Genalex A2900 Keep or Sell?
  228. 6CB6 Spice Model wanted
  229. XFMR Help?
  230. 12 volt to 300 volt inverter question for tubes
  231. These amps should be verboten!
  232. how to use PCL86 instead of ecl86
  233. PSU for Aikido (4x 12SN7)
  234. SCA35 and AU-70
  235. Analisys of power amp limitations of tube bias range
  236. DIY Phono Preamp ??
  237. NOS 211 RCA or National Union?
  238. Iron Powder + Resin Output Transformer
  239. The Radio Hat Challenge
  240. EU regulations
  241. Transconductance for kt-90 in plain english
  242. Craftsmen RC-2
  243. Valve Amplification Company V100
  244. Parallel feed transformer with SRPP
  245. It's heeeeeere!- Valve Amplifiers 4th Edition
  246. opera consonance phonostage-PM1
  247. Anybody Explain this Preamp shematic?
  248. The high-voltage collection
  249. Input transformer topology question
  250. JE Labs 300Bdx stereo - troubleshooting

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