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  1. amp with the FD422
  2. ST-35 C-1 Capacitor on PC-13 board.
  3. Transformer winding examples!!!!
  4. sansui sm-33
  5. How to mod ASL MG OTL 32 DT?
  6. 300b problem
  7. Audio Research M100s
  8. E83CC in PI or Preamp
  9. Current Dumping Amplifier
  10. Quicksilver 8417 Bias
  11. PtP wiring: Solidcore unshielded cable
  12. Removing a motor from a tube turntable.
  13. Why do I go to hamfests?
  14. Circlotron Amplifier Advice Needed
  15. Traces inside tube?
  16. Hybrid for Zobsky
  17. help identifying telefunken tubes
  18. 5U4GB Tube Power Supply Schematic
  19. Copland CTA-401 - early layout ?
  20. AVO CT160: Testing dual triodes
  21. Need to run heaters in output tubes, remove plate and screen safe?
  22. 1AG4 Direct Heated Pentode, Output
  23. grid stopper and grid choke on pentode input
  24. Has anyone tryied the GuiGuang 300B?
  25. Honeywell Mercury Tube?
  26. Tube audio-phoolery -- more teats on bulls
  27. Strange tube
  28. Adding a Headphone output to my amp.
  29. 6CG7 Phono/ linestage
  30. RH84 Build from old Dumont console
  31. 6N16 12x preamp srpp/cathode follower with printed circuit board design.
  32. Long Tail Pair
  33. Hickok 752A 5AR4 rectifier test?
  34. Shunt Capacitance in Output Transformer
  35. LTP vs single first stage
  36. 6n23 v. 6dj8 v. 6fq7
  37. newer than noob looking for advice on RH84
  38. 300B failed again
  39. No output transformer tube amp
  40. curious about a curious connection
  41. tube crossover project - http://www.pmillett.com/tube_active_crossover.htm
  42. My new "vintage" tube radio
  43. help designing 6L6G S.E. amplifier
  44. SVT output iron as single ended
  45. is 6s2p actually equiv to 8532?
  46. Grundig H&B 6007 tube power supply - Repair or gut for parts?
  47. Quad 22 stereo balance/ filter problem
  48. KR 2A3: problems?
  49. Philco F-1801
  50. KT88 Stereo Schematic and help
  51. Where should I connect ground reference for heater supply?
  52. Chassis size and layout question
  53. May tubes amps
  54. 12SX7 coin base tubes? Fake?
  55. Toroidal transformer on tube amp
  56. Current Mirrors in a balanced preamp
  57. Half-mu stage (or SRPP) w/6DJ8/6922/ECC88 tubes at Low B+ voltage?
  58. High-end Tube amp kits (all-included)
  59. High Current Maida
  60. High Current Maida
  61. Balanced tube preamp schematic or kit?
  62. Trying to find tube component supplier, lost webite ...VT42.com or something like it.
  63. 2A3 PP Can my OPT do the job?
  64. 1626 / 6j4 tube amp
  65. suggestions for driver tube for 2A3
  66. Does anyone know the specs for this Chinese pentode
  67. SiliconRay Kits
  68. Advice needed for hum reduction
  69. low voltage dc tube phase splitter/12AU7
  70. Damper rectifier tubes & voltage doubler
  71. Overheating Resistors on DAC board- "HELP NEEDED"
  72. opt primary inductance and secondary load
  73. SOS-HELP-AIDE-HILFE on " DAC dilema"
  74. Transformer Mounting Direction
  75. HELP! new to working on tube amps and need help with project im going to take on
  76. Fisher 500c radio hum
  77. Modify Power supply for Tube Amp
  78. Unusual amps..
  79. Anyone make a guitar amp from an EA-3?
  80. Help with Preamp/Amp hum
  81. Question about step up in 300B PP amp
  82. How do we reach PMillet?
  83. Please help me with a few questions and a idea for an old PA
  84. nos 5y3wgt in 5e3
  85. Edcor CXSE25-8-2.5K single ended UL transformer
  86. Voltseconds ccs for the K-12 kit
  87. The Torpedo Parafeed Headphone Amplifier
  88. Tube Rectifiers do sound different
  89. 6922, a 6DJ8 replacement??
  90. QB2/250 amplifier
  91. WE 350B and 311A
  92. Single ended 300b's
  93. More power!
  94. How the magnetic affect the sound of tube amplifier
  95. Valves replacement for Copland CT402
  96. Changing valve damage
  97. Tube phono preamplifier by 12ax7
  98. Altec 353A oddity
  99. I need to lose that Hummmm
  100. Reduce B+ with zener
  101. Old Marshall plexi clone problem
  102. triode and pentode 6v6 in parallel
  103. How to make mic input transformer 150:50KCT for mic tube preamp???
  104. Webcor 12AU7 is it a Mullard?
  105. Everett AO48
  106. Resurrecting old tubes
  107. Lumley ST70 Output impedance change and other questions
  108. AC Heater reference to B+
  109. Two tube class a2 se trioded el84 with 12dw7 cathode follower driver?
  110. Overly complicated 1.6A CCS Heater Supply
  111. Hibryd amplifier with tube/valve ECC88 (PCC88) and chipamp LM1875
  112. Tube/Valve buffer with ECC88
  113. High(er) gm octal pentodes?
  114. Shielding Characteristics of Copper Clad PCB
  115. Starting a Meixing MC34-A07 modification project
  116. 6V SLA Dropping resistor for a 5VDC Filament Supply
  117. Wind (Thermionic?) noise, and other strange sounds
  118. Suggestions for an tube-amp with KT88
  119. SE-100 Golden Tube Audio - REPAIR
  120. Power amp vs preamp topology
  121. EL34 Characteristics for Ug2 400V
  122. old Heathkit amp
  123. Toroid OPT for 300B
  124. Help: Connecting two Fluke meters in series
  125. Preamp Volume Controls
  126. Output SE Transformer Question
  127. Vintage electrolytic capacitors
  128. Silver bearing grease for tube sockets
  129. Should I try adding a small Tube Preamp to a DTA-100?
  130. IS 6N6P A DIRECT REPLACEMENT FOR ECC88CC ?
  131. Dynaco stereo 70 look alike
  132. Vacuum Tube factory: For Sale!
  133. Does anybody know anything about this German console
  134. Heater dillema for multi chassis phono stage.
  135. Q: lifespan of JJ ECC99 tubes
  136. Cold solder joint?
  137. Input Impedance/Buffers
  138. Old capacitors..Comments..
  139. Shizuki capacitors?
  140. Spectrum Analyzer: What to get ? What to look for in a spectrum analyzer ?
  141. Amperex Orange Globe 12ax7 ,Brimar cv4004
  142. Question about transformer lamination stacking techniques
  143. line preamplifier with 6c10
  144. Homebrew Toroidal Output Transformer
  145. Line output tube
  146. MJK's SSSchadeode
  147. Any one know were to buy the fu-80 tube?
  148. Maida Regulator PCB
  149. Suggestions for 7k output transformers.
  150. Help: Fluke 87V Meter Calibration
  151. Searching for Primaluna Prologue Three schematic
  152. JCM Build - Hum and Crackle
  153. Silvertone radio to Guitar Amp conversion question.
  154. Pentode Regulation Question
  155. pentodes with CCS load?
  156. Are these tube PCBs any good ?
  157. china 6L6 SEdiy
  158. What are your opinions of the ST-70 and St-120
  159. Baffle Step Compensation Tube Circuit
  160. 6L6 to 7027 cathode resistor value
  161. PCB to mount snapmout electrolytic capacitors
  162. Dared MC-7P Upgrades
  163. adapter to go from 6L6 to 807
  164. My Experience with a Jolida 202s (SoFar..)
  165. Cathodyne gain calculator link
  166. Dynakit ST-35?
  167. PSUD modeling old amp PS fails.
  168. Fisher 800 push-pull output stage not symmetrical. Why?
  169. Question of D3a driving 300B
  170. old console amp
  171. st35 vs millett DCPP vs tubelab simple SE
  172. New Tim Mellows OTL project
  173. Melted my mains transformer - Where to find replacement ?
  174. Strange.................
  175. Effect of high mains voltage?
  176. Kent SL 21 Tube head need help!!
  177. Hexfred or SIC rectifiers in choke supplies
  178. 'Strange' bass boost with impedance transformer
  179. Did my tubes go south ?
  180. Use of Tango NN-600-600 Transformers ?
  181. Anyone have an explanation for break(burn)in
  182. The Right Tube & TRannie
  183. 6SL7 / 6SN7 Phono
  184. Tube integrated amp in China.
  185. Power supply issues with Borbely style 12AU7/MOSFET hybrid
  186. heater elevation ground point
  187. Edison 12, can anyone help?
  188. Delay B+ using relay?
  189. New Schematic Linestage Tube Preamp using EF86 & 12AX7
  190. Phonostage (WAD clone) and 12B4A Preamp Build
  191. Interstage coupling feedback
  192. Just received a Yaqin MC-10T and have a couple of questions.
  193. Amplifier Troubleshooting
  194. Audio Preamplifier with PCC88
  195. Need Help With These TriodeDick Preamp Scematics
  196. I need help with my amp project
  197. Looking for unbalanced to balanced transformer
  198. Power Transformer Question
  199. My First Tube Amp Project S5 K-12G
  200. 6E2 vacuum tube compatibility
  201. Tube condenser microphone help!
  202. Audio transformer feedback loop
  203. yaqin vk amp without the loudness button uk version
  204. PP driver stage with local feedback
  205. Leader LAG-120B Audio Generator Manual Wanted
  206. Transformer brand question
  207. Single ended at 24Vcc 1+1W @ 8 ohm - three tubes
  208. EL41 PP power supply questions
  209. Reduce output on a ECC88CC class A pre-amp !
  210. SE OT impedance question
  211. DIY Tube amp book?
  212. 6P6P tubes?? will 6V6's work?
  213. RH84 amplifier build, but very weak distorted output
  214. Paralleling filament transformers
  215. 6ak5 triode mode disipation
  216. Equalize or Not Equilize when driving a tube amp ?
  217. How to retire from DIY and sell off all your workshop contents?
  218. New to tubes and diyaudio here, question about torrids and tube amps...
  219. PC Based Oscilliscope for Tube Curcuits
  220. Lamp in HV Centre Tap - why?
  221. EL156 PP
  222. 300B resistor
  223. Has anyone here bought from ussr-tubes.com ?
  224. Which cathode bypass capacitor?
  225. RIAA Schematic for-6SL7,7308 or?
  226. Chassis' for Tube Gear
  227. Convergent Audio Tech SL1 preamp
  228. Buy Them While You Can Not When You...
  229. Does anyone know of Thomas Martens?
  230. OTL for 40-80ohm speakers
  231. Morrison Dinosaur
  232. pcl86=14gw8 ??
  233. My little SE with GU50
  234. Source follower in a DC-coupled pp amp?
  235. Tube chassis for retail sale.
  236. Poor man's power supply
  237. High voltage driver for AB2 operation GU81m tubes
  238. 5AR4 rectified power supply question
  239. Direct Coupled Amp
  240. Is this EL84 kit from Germany worth fooling with?
  241. 6v6 PP Pentode mode
  242. 5 pin octal tube socket
  243. RCA Manual Typo?
  244. pete millet low mu preamp
  245. Capability to drive the 211 PP
  246. 6BG6G SE advice needed.
  247. Signal Generator: Which one to buy ? What to look for in a signal generator ?
  248. Power booster
  249. I've just build this steroe amplifier
  250. What amp to build? Push Pull, SE? thoughts?

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