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  1. Current Dumping Amplifier
  2. Quicksilver 8417 Bias
  3. PtP wiring: Solidcore unshielded cable
  4. Removing a motor from a tube turntable.
  5. Why do I go to hamfests?
  6. Circlotron Amplifier Advice Needed
  7. Traces inside tube?
  8. Hybrid for Zobsky
  9. help identifying telefunken tubes
  10. 5U4GB Tube Power Supply Schematic
  11. Copland CTA-401 - early layout ?
  12. AVO CT160: Testing dual triodes
  13. Need to run heaters in output tubes, remove plate and screen safe?
  14. 1AG4 Direct Heated Pentode, Output
  15. grid stopper and grid choke on pentode input
  16. Has anyone tryied the GuiGuang 300B?
  17. Honeywell Mercury Tube?
  18. Tube audio-phoolery -- more teats on bulls
  19. Strange tube
  20. Adding a Headphone output to my amp.
  21. 6CG7 Phono/ linestage
  22. RH84 Build from old Dumont console
  23. 6N16 12x preamp srpp/cathode follower with printed circuit board design.
  24. Long Tail Pair
  25. Hickok 752A 5AR4 rectifier test?
  26. Shunt Capacitance in Output Transformer
  27. LTP vs single first stage
  28. 6n23 v. 6dj8 v. 6fq7
  29. newer than noob looking for advice on RH84
  30. 300B failed again
  31. No output transformer tube amp
  32. curious about a curious connection
  33. tube crossover project - http://www.pmillett.com/tube_active_crossover.htm
  34. My new "vintage" tube radio
  35. help designing 6L6G S.E. amplifier
  36. SVT output iron as single ended
  37. is 6s2p actually equiv to 8532?
  38. Grundig H&B 6007 tube power supply - Repair or gut for parts?
  39. Quad 22 stereo balance/ filter problem
  40. KR 2A3: problems?
  41. Philco F-1801
  42. KT88 Stereo Schematic and help
  43. Where should I connect ground reference for heater supply?
  44. Chassis size and layout question
  45. May tubes amps
  46. 12SX7 coin base tubes? Fake?
  47. Toroidal transformer on tube amp
  48. Current Mirrors in a balanced preamp
  49. Half-mu stage (or SRPP) w/6DJ8/6922/ECC88 tubes at Low B+ voltage?
  50. High-end Tube amp kits (all-included)
  51. High Current Maida
  52. High Current Maida
  53. Balanced tube preamp schematic or kit?
  54. Trying to find tube component supplier, lost webite ...VT42.com or something like it.
  55. 2A3 PP Can my OPT do the job?
  56. 1626 / 6j4 tube amp
  57. suggestions for driver tube for 2A3
  58. Does anyone know the specs for this Chinese pentode
  59. SiliconRay Kits
  60. Advice needed for hum reduction
  61. low voltage dc tube phase splitter/12AU7
  62. Damper rectifier tubes & voltage doubler
  63. Overheating Resistors on DAC board- "HELP NEEDED"
  64. opt primary inductance and secondary load
  65. SOS-HELP-AIDE-HILFE on " DAC dilema"
  66. Transformer Mounting Direction
  67. HELP! new to working on tube amps and need help with project im going to take on
  68. Fisher 500c radio hum
  69. Modify Power supply for Tube Amp
  70. Unusual amps..
  71. Help with Preamp/Amp hum
  72. Question about step up in 300B PP amp
  73. How do we reach PMillet?
  74. Please help me with a few questions and a idea for an old PA
  75. nos 5y3wgt in 5e3
  76. Edcor CXSE25-8-2.5K single ended UL transformer
  77. Voltseconds ccs for the K-12 kit
  78. The Torpedo Parafeed Headphone Amplifier
  79. Tube Rectifiers do sound different
  80. 6922, a 6DJ8 replacement??
  81. QB2/250 amplifier
  82. WE 350B and 311A
  83. Single ended 300b's
  84. More power!
  85. How the magnetic affect the sound of tube amplifier
  86. Valves replacement for Copland CT402
  87. Changing valve damage
  88. Tube phono preamplifier by 12ax7
  89. Altec 353A oddity
  90. I need to lose that Hummmm
  91. Reduce B+ with zener
  92. triode and pentode 6v6 in parallel
  93. How to make mic input transformer 150:50KCT for mic tube preamp???
  94. Webcor 12AU7 is it a Mullard?
  95. Everett AO48
  96. Resurrecting old tubes
  97. Lumley ST70 Output impedance change and other questions
  98. AC Heater reference to B+
  99. Two tube class a2 se trioded el84 with 12dw7 cathode follower driver?
  100. Overly complicated 1.6A CCS Heater Supply
  101. Hibryd amplifier with tube/valve ECC88 (PCC88) and chipamp LM1875
  102. Tube/Valve buffer with ECC88
  103. High(er) gm octal pentodes?
  104. Shielding Characteristics of Copper Clad PCB
  105. Starting a Meixing MC34-A07 modification project
  106. 6V SLA Dropping resistor for a 5VDC Filament Supply
  107. Wind (Thermionic?) noise, and other strange sounds
  108. Suggestions for an tube-amp with KT88
  109. SE-100 Golden Tube Audio - REPAIR
  110. Power amp vs preamp topology
  111. EL34 Characteristics for Ug2 400V
  112. old Heathkit amp
  113. Toroid OPT for 300B
  114. Help: Connecting two Fluke meters in series
  115. Preamp Volume Controls
  116. Output SE Transformer Question
  117. Vintage electrolytic capacitors
  118. Silver bearing grease for tube sockets
  119. Should I try adding a small Tube Preamp to a DTA-100?
  120. IS 6N6P A DIRECT REPLACEMENT FOR ECC88CC ?
  121. Dynaco stereo 70 look alike
  122. Vacuum Tube factory: For Sale!
  123. Does anybody know anything about this German console
  124. Heater dillema for multi chassis phono stage.
  125. Q: lifespan of JJ ECC99 tubes
  126. Cold solder joint?
  127. Input Impedance/Buffers
  128. Old capacitors..Comments..
  129. Shizuki capacitors?
  130. Spectrum Analyzer: What to get ? What to look for in a spectrum analyzer ?
  131. Amperex Orange Globe 12ax7 ,Brimar cv4004
  132. Question about transformer lamination stacking techniques
  133. line preamplifier with 6c10
  134. Homebrew Toroidal Output Transformer
  135. Line output tube
  136. MJK's SSSchadeode
  137. Any one know were to buy the fu-80 tube?
  138. Maida Regulator PCB
  139. Suggestions for 7k output transformers.
  140. Help: Fluke 87V Meter Calibration
  141. Searching for Primaluna Prologue Three schematic
  142. JCM Build - Hum and Crackle
  143. Pentode Regulation Question
  144. pentodes with CCS load?
  145. Are these tube PCBs any good ?
  146. china 6L6 SEdiy
  147. What are your opinions of the ST-70 and St-120
  148. Baffle Step Compensation Tube Circuit
  149. 6L6 to 7027 cathode resistor value
  150. PCB to mount snapmout electrolytic capacitors
  151. Dared MC-7P Upgrades
  152. adapter to go from 6L6 to 807
  153. My Experience with a Jolida 202s (SoFar..)
  154. Cathodyne gain calculator link
  155. Dynakit ST-35?
  156. PSUD modeling old amp PS fails.
  157. Fisher 800 push-pull output stage not symmetrical. Why?
  158. Question of D3a driving 300B
  159. old console amp
  160. st35 vs millett DCPP vs tubelab simple SE
  161. New Tim Mellows OTL project
  162. Melted my mains transformer - Where to find replacement ?
  163. Strange.................
  164. Effect of high mains voltage?
  165. Kent SL 21 Tube head need help!!
  166. Hexfred or SIC rectifiers in choke supplies
  167. 'Strange' bass boost with impedance transformer
  168. Did my tubes go south ?
  169. Use of Tango NN-600-600 Transformers ?
  170. Anyone have an explanation for break(burn)in
  171. The Right Tube & TRannie
  172. 6SL7 / 6SN7 Phono
  173. Tube integrated amp in China.
  174. Power supply issues with Borbely style 12AU7/MOSFET hybrid
  175. heater elevation ground point
  176. Edison 12, can anyone help?
  177. Delay B+ using relay?
  178. New Schematic Linestage Tube Preamp using EF86 & 12AX7
  179. Phonostage (WAD clone) and 12B4A Preamp Build
  180. Interstage coupling feedback
  181. Just received a Yaqin MC-10T and have a couple of questions.
  182. Amplifier Troubleshooting
  183. Audio Preamplifier with PCC88
  184. Need Help With These TriodeDick Preamp Scematics
  185. I need help with my amp project
  186. Looking for unbalanced to balanced transformer
  187. Power Transformer Question
  188. My First Tube Amp Project S5 K-12G
  189. 6E2 vacuum tube compatibility
  190. Tube condenser microphone help!
  191. Audio transformer feedback loop
  192. yaqin vk amp without the loudness button uk version
  193. PP driver stage with local feedback
  194. Leader LAG-120B Audio Generator Manual Wanted
  195. Transformer brand question
  196. Single ended at 24Vcc 1+1W @ 8 ohm - three tubes
  197. EL41 PP power supply questions
  198. Reduce output on a ECC88CC class A pre-amp !
  199. SE OT impedance question
  200. DIY Tube amp book?
  201. 6P6P tubes?? will 6V6's work?
  202. RH84 amplifier build, but very weak distorted output
  203. Paralleling filament transformers
  204. 6ak5 triode mode disipation
  205. Equalize or Not Equilize when driving a tube amp ?
  206. How to retire from DIY and sell off all your workshop contents?
  207. New to tubes and diyaudio here, question about torrids and tube amps...
  208. PC Based Oscilliscope for Tube Curcuits
  209. Lamp in HV Centre Tap - why?
  210. EL156 PP
  211. 300B resistor
  212. Has anyone here bought from ussr-tubes.com ?
  213. Which cathode bypass capacitor?
  214. RIAA Schematic for-6SL7,7308 or?
  215. Chassis' for Tube Gear
  216. Convergent Audio Tech SL1 preamp
  217. Buy Them While You Can Not When You...
  218. Does anyone know of Thomas Martens?
  219. OTL for 40-80ohm speakers
  220. Morrison Dinosaur
  221. pcl86=14gw8 ??
  222. My little SE with GU50
  223. Source follower in a DC-coupled pp amp?
  224. Tube chassis for retail sale.
  225. Poor man's power supply
  226. High voltage driver for AB2 operation GU81m tubes
  227. 5AR4 rectified power supply question
  228. Direct Coupled Amp
  229. Is this EL84 kit from Germany worth fooling with?
  230. 6v6 PP Pentode mode
  231. 5 pin octal tube socket
  232. RCA Manual Typo?
  233. pete millet low mu preamp
  234. Capability to drive the 211 PP
  235. 6BG6G SE advice needed.
  236. Signal Generator: Which one to buy ? What to look for in a signal generator ?
  237. Power booster
  238. I've just build this steroe amplifier
  239. What amp to build? Push Pull, SE? thoughts?
  240. amp sounds bad- fatman itube 252
  241. 6C33 single ended class A2 (cathode network question)
  242. Sweet Peach EL34b Amp - Distortion?
  243. 6C33C socket types, where to buy?
  244. haedphone amp. using 6418< NEED HELP
  245. finished my 6au6/807 amplifier
  246. Thinking about building an S5 16LS 16W amp I've got some questions for the forum./
  247. Broskie "Unbalancer" - transformer specifications
  248. Tube chess.
  249. How Its Made - Vacuum Tubes
  250. Please help me understand power supply load

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