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  1. Rectifier injecting noise into heater supply
  2. Tube base failures
  3. 1624 as DHT triode outputs
  4. Will this 2 stage DC DHT cct idea work?
  5. Help with Output Transformer
  6. multi cap verses add on power supply board
  7. 6AS7 hybride CCS
  8. Decware Zbox - looking for Tube buffer mods to reduce buzz
  9. Decware Zbox - looking for Tube buffer mods to reduce buzz
  10. Eico-ST-70 Advice
  11. Choosing Btw 2 EL34 China Tube Amps
  12. Looking for the GA article.
  13. Tube amp left ch. hum
  14. Did i model this PT correctly(psud2)?
  15. Help with the modifications of my tube-amp
  16. detailed photos of RH 84 build?
  17. heathkit aa-191
  18. Which KT-88 tube?
  19. 10m45s cascode diagram?
  20. What amp can make use of these large caps?
  21. Leslie 720 used with stereo keyboard
  22. Tube testers : sorting out settings for the Jackson 648
  23. Question about Shishido 2A3
  24. amp with the FD422
  25. ST-35 C-1 Capacitor on PC-13 board.
  26. Transformer winding examples!!!!
  27. sansui sm-33
  28. How to mod ASL MG OTL 32 DT?
  29. 300b problem
  30. Audio Research M100s
  31. E83CC in PI or Preamp
  32. Current Dumping Amplifier
  33. Quicksilver 8417 Bias
  34. PtP wiring: Solidcore unshielded cable
  35. Removing a motor from a tube turntable.
  36. Why do I go to hamfests?
  37. Circlotron Amplifier Advice Needed
  38. Traces inside tube?
  39. Hybrid for Zobsky
  40. help identifying telefunken tubes
  41. 5U4GB Tube Power Supply Schematic
  42. Copland CTA-401 - early layout ?
  43. Need to run heaters in output tubes, remove plate and screen safe?
  44. 1AG4 Direct Heated Pentode, Output
  45. grid stopper and grid choke on pentode input
  46. Has anyone tryied the GuiGuang 300B?
  47. Honeywell Mercury Tube?
  48. Tube audio-phoolery -- more teats on bulls
  49. Strange tube
  50. Adding a Headphone output to my amp.
  51. 6CG7 Phono/ linestage
  52. RH84 Build from old Dumont console
  53. 6N16 12x preamp srpp/cathode follower with printed circuit board design.
  54. Long Tail Pair
  55. Shunt Capacitance in Output Transformer
  56. LTP vs single first stage
  57. 6n23 v. 6dj8 v. 6fq7
  58. newer than noob looking for advice on RH84
  59. 300B failed again
  60. No output transformer tube amp
  61. curious about a curious connection
  62. tube crossover project - http://www.pmillett.com/tube_active_crossover.htm
  63. My new "vintage" tube radio
  64. help designing 6L6G S.E. amplifier
  65. SVT output iron as single ended
  66. is 6s2p actually equiv to 8532?
  67. Grundig H&B 6007 tube power supply - Repair or gut for parts?
  68. Quad 22 stereo balance/ filter problem
  69. KR 2A3: problems?
  70. Philco F-1801
  71. KT88 Stereo Schematic and help
  72. Where should I connect ground reference for heater supply?
  73. Chassis size and layout question
  74. May tubes amps
  75. 12SX7 coin base tubes? Fake?
  76. Toroidal transformer on tube amp
  77. Current Mirrors in a balanced preamp
  78. Half-mu stage (or SRPP) w/6DJ8/6922/ECC88 tubes at Low B+ voltage?
  79. High-end Tube amp kits (all-included)
  80. High Current Maida
  81. High Current Maida
  82. Balanced tube preamp schematic or kit?
  83. Trying to find tube component supplier, lost webite ...VT42.com or something like it.
  84. 2A3 PP Can my OPT do the job?
  85. 1626 / 6j4 tube amp
  86. suggestions for driver tube for 2A3
  87. Does anyone know the specs for this Chinese pentode
  88. SiliconRay Kits
  89. Advice needed for hum reduction
  90. low voltage dc tube phase splitter/12AU7
  91. Damper rectifier tubes & voltage doubler
  92. Overheating Resistors on DAC board- "HELP NEEDED"
  93. opt primary inductance and secondary load
  94. SOS-HELP-AIDE-HILFE on " DAC dilema"
  95. Transformer Mounting Direction
  96. HELP! new to working on tube amps and need help with project im going to take on
  97. Fisher 500c radio hum
  98. Modify Power supply for Tube Amp
  99. Unusual amps..
  100. Help with Preamp/Amp hum
  101. Question about step up in 300B PP amp
  102. How do we reach PMillet?
  103. Please help me with a few questions and a idea for an old PA
  104. Edcor CXSE25-8-2.5K single ended UL transformer
  105. Voltseconds ccs for the K-12 kit
  106. The Torpedo Parafeed Headphone Amplifier
  107. Tube Rectifiers do sound different
  108. 6922, a 6DJ8 replacement??
  109. QB2/250 amplifier
  110. WE 350B and 311A
  111. Single ended 300b's
  112. More power!
  113. How the magnetic affect the sound of tube amplifier
  114. Valves replacement for Copland CT402
  115. Changing valve damage
  116. Tube phono preamplifier by 12ax7
  117. Altec 353A oddity
  118. I need to lose that Hummmm
  119. Reduce B+ with zener
  120. triode and pentode 6v6 in parallel
  121. How to make mic input transformer 150:50KCT for mic tube preamp???
  122. Webcor 12AU7 is it a Mullard?
  123. Everett AO48
  124. Resurrecting old tubes
  125. Lumley ST70 Output impedance change and other questions
  126. AC Heater reference to B+
  127. Two tube class a2 se trioded el84 with 12dw7 cathode follower driver?
  128. Overly complicated 1.6A CCS Heater Supply
  129. Hibryd amplifier with tube/valve ECC88 (PCC88) and chipamp LM1875
  130. Tube/Valve buffer with ECC88
  131. High(er) gm octal pentodes?
  132. Shielding Characteristics of Copper Clad PCB
  133. Starting a Meixing MC34-A07 modification project
  134. 6V SLA Dropping resistor for a 5VDC Filament Supply
  135. Wind (Thermionic?) noise, and other strange sounds
  136. Suggestions for an tube-amp with KT88
  137. SE-100 Golden Tube Audio - REPAIR
  138. Power amp vs preamp topology
  139. EL34 Characteristics for Ug2 400V
  140. old Heathkit amp
  141. Toroid OPT for 300B
  142. Help: Connecting two Fluke meters in series
  143. Preamp Volume Controls
  144. Output SE Transformer Question
  145. Silver bearing grease for tube sockets
  146. Should I try adding a small Tube Preamp to a DTA-100?
  147. IS 6N6P A DIRECT REPLACEMENT FOR ECC88CC ?
  148. Dynaco stereo 70 look alike
  149. Vacuum Tube factory: For Sale!
  150. Does anybody know anything about this German console
  151. Heater dillema for multi chassis phono stage.
  152. Q: lifespan of JJ ECC99 tubes
  153. Cold solder joint?
  154. Input Impedance/Buffers
  155. Old capacitors..Comments..
  156. Shizuki capacitors?
  157. Spectrum Analyzer: What to get ? What to look for in a spectrum analyzer ?
  158. Amperex Orange Globe 12ax7 ,Brimar cv4004
  159. Question about transformer lamination stacking techniques
  160. line preamplifier with 6c10
  161. Homebrew Toroidal Output Transformer
  162. Line output tube
  163. MJK's SSSchadeode
  164. Any one know were to buy the fu-80 tube?
  165. Maida Regulator PCB
  166. Suggestions for 7k output transformers.
  167. Help: Fluke 87V Meter Calibration
  168. Searching for Primaluna Prologue Three schematic
  169. Pentode Regulation Question
  170. pentodes with CCS load?
  171. Are these tube PCBs any good ?
  172. china 6L6 SEdiy
  173. What are your opinions of the ST-70 and St-120
  174. Baffle Step Compensation Tube Circuit
  175. 6L6 to 7027 cathode resistor value
  176. Dared MC-7P Upgrades
  177. adapter to go from 6L6 to 807
  178. My Experience with a Jolida 202s (SoFar..)
  179. Cathodyne gain calculator link
  180. Dynakit ST-35?
  181. PSUD modeling old amp PS fails.
  182. Fisher 800 push-pull output stage not symmetrical. Why?
  183. Question of D3a driving 300B
  184. old console amp
  185. New Tim Mellows OTL project
  186. Melted my mains transformer - Where to find replacement ?
  187. Strange.................
  188. Effect of high mains voltage?
  189. Kent SL 21 Tube head need help!!
  190. Hexfred or SIC rectifiers in choke supplies
  191. 'Strange' bass boost with impedance transformer
  192. Did my tubes go south ?
  193. Use of Tango NN-600-600 Transformers ?
  194. Anyone have an explanation for break(burn)in
  195. The Right Tube & TRannie
  196. 6SL7 / 6SN7 Phono
  197. Tube integrated amp in China.
  198. Power supply issues with Borbely style 12AU7/MOSFET hybrid
  199. heater elevation ground point
  200. Edison 12, can anyone help?
  201. Delay B+ using relay?
  202. New Schematic Linestage Tube Preamp using EF86 & 12AX7
  203. Phonostage (WAD clone) and 12B4A Preamp Build
  204. Interstage coupling feedback
  205. Just received a Yaqin MC-10T and have a couple of questions.
  206. Amplifier Troubleshooting
  207. Audio Preamplifier with PCC88
  208. Need Help With These TriodeDick Preamp Scematics
  209. I need help with my amp project
  210. Looking for unbalanced to balanced transformer
  211. Power Transformer Question
  212. My First Tube Amp Project S5 K-12G
  213. 6E2 vacuum tube compatibility
  214. Tube condenser microphone help!
  215. Audio transformer feedback loop
  216. yaqin vk amp without the loudness button uk version
  217. PP driver stage with local feedback
  218. Leader LAG-120B Audio Generator Manual Wanted
  219. Transformer brand question
  220. Single ended at 24Vcc 1+1W @ 8 ohm - three tubes
  221. EL41 PP power supply questions
  222. Reduce output on a ECC88CC class A pre-amp !
  223. SE OT impedance question
  224. DIY Tube amp book?
  225. 6P6P tubes?? will 6V6's work?
  226. RH84 amplifier build, but very weak distorted output
  227. Paralleling filament transformers
  228. 6ak5 triode mode disipation
  229. Equalize or Not Equilize when driving a tube amp ?
  230. How to retire from DIY and sell off all your workshop contents?
  231. New to tubes and diyaudio here, question about torrids and tube amps...
  232. PC Based Oscilliscope for Tube Curcuits
  233. Lamp in HV Centre Tap - why?
  234. EL156 PP
  235. Has anyone here bought from ussr-tubes.com ?
  236. Which cathode bypass capacitor?
  237. RIAA Schematic for-6SL7,7308 or?
  238. Chassis' for Tube Gear
  239. Convergent Audio Tech SL1 preamp
  240. Buy Them While You Can Not When You...
  241. Does anyone know of Thomas Martens?
  242. OTL for 40-80ohm speakers
  243. Morrison Dinosaur
  244. pcl86=14gw8 ??
  245. My little SE with GU50
  246. Source follower in a DC-coupled pp amp?
  247. Tube chassis for retail sale.
  248. Poor man's power supply
  249. High voltage driver for AB2 operation GU81m tubes
  250. 5AR4 rectified power supply question

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