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  1. multi cap verses add on power supply board
  2. 6AS7 hybride CCS
  3. Decware Zbox - looking for Tube buffer mods to reduce buzz
  4. Decware Zbox - looking for Tube buffer mods to reduce buzz
  5. Eico-ST-70 Advice
  6. Choosing Btw 2 EL34 China Tube Amps
  7. Looking for the GA article.
  8. Tube amp left ch. hum
  9. Did i model this PT correctly(psud2)?
  10. Help with the modifications of my tube-amp
  11. detailed photos of RH 84 build?
  12. heathkit aa-191
  13. Which KT-88 tube?
  14. 10m45s cascode diagram?
  15. What amp can make use of these large caps?
  16. Leslie 720 used with stereo keyboard
  17. Tube testers : sorting out settings for the Jackson 648
  18. Question about Shishido 2A3
  19. A micro-programmable tube tracer/tester
  20. amp with the FD422
  21. ST-35 C-1 Capacitor on PC-13 board.
  22. Transformer winding examples!!!!
  23. sansui sm-33
  24. How to mod ASL MG OTL 32 DT?
  25. 300b problem
  26. Audio Research M100s
  27. E83CC in PI or Preamp
  28. Current Dumping Amplifier
  29. Quicksilver 8417 Bias
  30. PtP wiring: Solidcore unshielded cable
  31. Removing a motor from a tube turntable.
  32. Why do I go to hamfests?
  33. Circlotron Amplifier Advice Needed
  34. Traces inside tube?
  35. Hybrid for Zobsky
  36. help identifying telefunken tubes
  37. 5U4GB Tube Power Supply Schematic
  38. Copland CTA-401 - early layout ?
  39. AVO CT160: Testing dual triodes
  40. Need to run heaters in output tubes, remove plate and screen safe?
  41. 1AG4 Direct Heated Pentode, Output
  42. grid stopper and grid choke on pentode input
  43. Has anyone tryied the GuiGuang 300B?
  44. Honeywell Mercury Tube?
  45. Tube audio-phoolery -- more teats on bulls
  46. Strange tube
  47. Adding a Headphone output to my amp.
  48. 6CG7 Phono/ linestage
  49. RH84 Build from old Dumont console
  50. 6N16 12x preamp srpp/cathode follower with printed circuit board design.
  51. Long Tail Pair
  52. Hickok 752A 5AR4 rectifier test?
  53. Shunt Capacitance in Output Transformer
  54. LTP vs single first stage
  55. 6n23 v. 6dj8 v. 6fq7
  56. newer than noob looking for advice on RH84
  57. 300B failed again
  58. No output transformer tube amp
  59. curious about a curious connection
  60. tube crossover project - http://www.pmillett.com/tube_active_crossover.htm
  61. My new "vintage" tube radio
  62. help designing 6L6G S.E. amplifier
  63. SVT output iron as single ended
  64. is 6s2p actually equiv to 8532?
  65. Grundig H&B 6007 tube power supply - Repair or gut for parts?
  66. Quad 22 stereo balance/ filter problem
  67. KR 2A3: problems?
  68. Philco F-1801
  69. KT88 Stereo Schematic and help
  70. Where should I connect ground reference for heater supply?
  71. Chassis size and layout question
  72. May tubes amps
  73. 12SX7 coin base tubes? Fake?
  74. Toroidal transformer on tube amp
  75. Current Mirrors in a balanced preamp
  76. Half-mu stage (or SRPP) w/6DJ8/6922/ECC88 tubes at Low B+ voltage?
  77. High-end Tube amp kits (all-included)
  78. High Current Maida
  79. High Current Maida
  80. Balanced tube preamp schematic or kit?
  81. Trying to find tube component supplier, lost webite ...VT42.com or something like it.
  82. 2A3 PP Can my OPT do the job?
  83. 1626 / 6j4 tube amp
  84. suggestions for driver tube for 2A3
  85. Does anyone know the specs for this Chinese pentode
  86. SiliconRay Kits
  87. Advice needed for hum reduction
  88. low voltage dc tube phase splitter/12AU7
  89. Damper rectifier tubes & voltage doubler
  90. Overheating Resistors on DAC board- "HELP NEEDED"
  91. opt primary inductance and secondary load
  92. SOS-HELP-AIDE-HILFE on " DAC dilema"
  93. Transformer Mounting Direction
  94. HELP! new to working on tube amps and need help with project im going to take on
  95. Fisher 500c radio hum
  96. Modify Power supply for Tube Amp
  97. Unusual amps..
  98. Anyone make a guitar amp from an EA-3?
  99. Help with Preamp/Amp hum
  100. Question about step up in 300B PP amp
  101. How do we reach PMillet?
  102. Please help me with a few questions and a idea for an old PA
  103. nos 5y3wgt in 5e3
  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. Old Marshall plexi clone problem
  121. triode and pentode 6v6 in parallel
  122. How to make mic input transformer 150:50KCT for mic tube preamp???
  123. Webcor 12AU7 is it a Mullard?
  124. Everett AO48
  125. Resurrecting old tubes
  126. Lumley ST70 Output impedance change and other questions
  127. AC Heater reference to B+
  128. Two tube class a2 se trioded el84 with 12dw7 cathode follower driver?
  129. Overly complicated 1.6A CCS Heater Supply
  130. Hibryd amplifier with tube/valve ECC88 (PCC88) and chipamp LM1875
  131. Tube/Valve buffer with ECC88
  132. High(er) gm octal pentodes?
  133. Shielding Characteristics of Copper Clad PCB
  134. Starting a Meixing MC34-A07 modification project
  135. 6V SLA Dropping resistor for a 5VDC Filament Supply
  136. Wind (Thermionic?) noise, and other strange sounds
  137. Suggestions for an tube-amp with KT88
  138. SE-100 Golden Tube Audio - REPAIR
  139. Power amp vs preamp topology
  140. EL34 Characteristics for Ug2 400V
  141. old Heathkit amp
  142. Toroid OPT for 300B
  143. Help: Connecting two Fluke meters in series
  144. Preamp Volume Controls
  145. Output SE Transformer Question
  146. Vintage electrolytic capacitors
  147. Silver bearing grease for tube sockets
  148. Should I try adding a small Tube Preamp to a DTA-100?
  149. IS 6N6P A DIRECT REPLACEMENT FOR ECC88CC ?
  150. Dynaco stereo 70 look alike
  151. Vacuum Tube factory: For Sale!
  152. Does anybody know anything about this German console
  153. Heater dillema for multi chassis phono stage.
  154. Q: lifespan of JJ ECC99 tubes
  155. Cold solder joint?
  156. Input Impedance/Buffers
  157. Old capacitors..Comments..
  158. Shizuki capacitors?
  159. Spectrum Analyzer: What to get ? What to look for in a spectrum analyzer ?
  160. Amperex Orange Globe 12ax7 ,Brimar cv4004
  161. Question about transformer lamination stacking techniques
  162. line preamplifier with 6c10
  163. Homebrew Toroidal Output Transformer
  164. Line output tube
  165. MJK's SSSchadeode
  166. Any one know were to buy the fu-80 tube?
  167. Maida Regulator PCB
  168. Suggestions for 7k output transformers.
  169. Help: Fluke 87V Meter Calibration
  170. Searching for Primaluna Prologue Three schematic
  171. JCM Build - Hum and Crackle
  172. Silvertone radio to Guitar Amp conversion question.
  173. Pentode Regulation Question
  174. pentodes with CCS load?
  175. Are these tube PCBs any good ?
  176. china 6L6 SEdiy
  177. What are your opinions of the ST-70 and St-120
  178. Baffle Step Compensation Tube Circuit
  179. 6L6 to 7027 cathode resistor value
  180. PCB to mount snapmout electrolytic capacitors
  181. Dared MC-7P Upgrades
  182. adapter to go from 6L6 to 807
  183. My Experience with a Jolida 202s (SoFar..)
  184. Cathodyne gain calculator link
  185. Dynakit ST-35?
  186. PSUD modeling old amp PS fails.
  187. Fisher 800 push-pull output stage not symmetrical. Why?
  188. Question of D3a driving 300B
  189. old console amp
  190. st35 vs millett DCPP vs tubelab simple SE
  191. New Tim Mellows OTL project
  192. Melted my mains transformer - Where to find replacement ?
  193. Strange.................
  194. Effect of high mains voltage?
  195. Kent SL 21 Tube head need help!!
  196. Hexfred or SIC rectifiers in choke supplies
  197. 'Strange' bass boost with impedance transformer
  198. Did my tubes go south ?
  199. Use of Tango NN-600-600 Transformers ?
  200. Anyone have an explanation for break(burn)in
  201. The Right Tube & TRannie
  202. 6SL7 / 6SN7 Phono
  203. Tube integrated amp in China.
  204. Power supply issues with Borbely style 12AU7/MOSFET hybrid
  205. heater elevation ground point
  206. Edison 12, can anyone help?
  207. Delay B+ using relay?
  208. New Schematic Linestage Tube Preamp using EF86 & 12AX7
  209. Phonostage (WAD clone) and 12B4A Preamp Build
  210. Interstage coupling feedback
  211. Just received a Yaqin MC-10T and have a couple of questions.
  212. Amplifier Troubleshooting
  213. Audio Preamplifier with PCC88
  214. Need Help With These TriodeDick Preamp Scematics
  215. I need help with my amp project
  216. Looking for unbalanced to balanced transformer
  217. Power Transformer Question
  218. My First Tube Amp Project S5 K-12G
  219. 6E2 vacuum tube compatibility
  220. Tube condenser microphone help!
  221. Audio transformer feedback loop
  222. yaqin vk amp without the loudness button uk version
  223. PP driver stage with local feedback
  224. Leader LAG-120B Audio Generator Manual Wanted
  225. Transformer brand question
  226. Single ended at 24Vcc 1+1W @ 8 ohm - three tubes
  227. EL41 PP power supply questions
  228. Reduce output on a ECC88CC class A pre-amp !
  229. SE OT impedance question
  230. DIY Tube amp book?
  231. 6P6P tubes?? will 6V6's work?
  232. RH84 amplifier build, but very weak distorted output
  233. Paralleling filament transformers
  234. 6ak5 triode mode disipation
  235. Equalize or Not Equilize when driving a tube amp ?
  236. How to retire from DIY and sell off all your workshop contents?
  237. New to tubes and diyaudio here, question about torrids and tube amps...
  238. PC Based Oscilliscope for Tube Curcuits
  239. Lamp in HV Centre Tap - why?
  240. EL156 PP
  241. 300B resistor
  242. Has anyone here bought from ussr-tubes.com ?
  243. Which cathode bypass capacitor?
  244. RIAA Schematic for-6SL7,7308 or?
  245. Chassis' for Tube Gear
  246. Convergent Audio Tech SL1 preamp
  247. Buy Them While You Can Not When You...
  248. Does anyone know of Thomas Martens?
  249. OTL for 40-80ohm speakers
  250. Morrison Dinosaur

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