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  1. Need Help with New Amp Build, Ugly signals
  2. Amplifier Saftey
  3. Cary SLM100 question (older brand)
  4. 6n18p 6n1p 6n2p project needed
  5. Heater wiring idea?
  6. 300B Amp Testing
  7. New amp build
  8. Bamboo chassis 6P3P SE
  9. 6N23P-EB SRPP DAC output stage.
  10. Packard Plamor Schematic needed
  11. Hickok 600A
  12. Opinion; Alternate input tube socket
  13. Very Simple Attenuator For Audio Card
  14. Switchable PI, Paraphase,Cathodyne, LTP.
  15. Hmm... 4-1000As
  16. Bootstrapped anode
  17. Selecting the correct output transformer/primary impedance
  18. Caddock MK-132 or Mills MRA-12 as plate R?
  19. Minimum rating for stepdown transformer
  20. 6L6 Dared VP-20 issues
  21. Potentiometer Desigations/Codes
  22. 6L6 SE Tube Amp Kit on eBay... opinions?
  23. Building a VT46/PT25H PP amp
  24. Help choosing Sweat Peach FU50 or KT100
  25. New FM-3 Boards
  26. Unity-Coupled amp project
  27. Rectifier injecting noise into heater supply
  28. Tube base failures
  29. 1624 as DHT triode outputs
  30. Will this 2 stage DC DHT cct idea work?
  31. Help with Output Transformer
  32. multi cap verses add on power supply board
  33. 6AS7 hybride CCS
  34. Decware Zbox - looking for Tube buffer mods to reduce buzz
  35. Decware Zbox - looking for Tube buffer mods to reduce buzz
  36. Eico-ST-70 Advice
  37. Choosing Btw 2 EL34 China Tube Amps
  38. Looking for the GA article.
  39. Tube amp left ch. hum
  40. Did i model this PT correctly(psud2)?
  41. Help with the modifications of my tube-amp
  42. detailed photos of RH 84 build?
  43. heathkit aa-191
  44. Which KT-88 tube?
  45. 10m45s cascode diagram?
  46. What amp can make use of these large caps?
  47. Leslie 720 used with stereo keyboard
  48. Tube testers : sorting out settings for the Jackson 648
  49. Question about Shishido 2A3
  50. A micro-programmable tube tracer/tester
  51. amp with the FD422
  52. ST-35 C-1 Capacitor on PC-13 board.
  53. Transformer winding examples!!!!
  54. sansui sm-33
  55. How to mod ASL MG OTL 32 DT?
  56. 300b problem
  57. Audio Research M100s
  58. E83CC in PI or Preamp
  59. Current Dumping Amplifier
  60. Quicksilver 8417 Bias
  61. PtP wiring: Solidcore unshielded cable
  62. Removing a motor from a tube turntable.
  63. Why do I go to hamfests?
  64. Circlotron Amplifier Advice Needed
  65. Traces inside tube?
  66. Hybrid for Zobsky
  67. help identifying telefunken tubes
  68. 5U4GB Tube Power Supply Schematic
  69. Copland CTA-401 - early layout ?
  70. AVO CT160: Testing dual triodes
  71. Need to run heaters in output tubes, remove plate and screen safe?
  72. 1AG4 Direct Heated Pentode, Output
  73. grid stopper and grid choke on pentode input
  74. Has anyone tryied the GuiGuang 300B?
  75. Honeywell Mercury Tube?
  76. Tube audio-phoolery -- more teats on bulls
  77. Strange tube
  78. Adding a Headphone output to my amp.
  79. 6CG7 Phono/ linestage
  80. RH84 Build from old Dumont console
  81. 6N16 12x preamp srpp/cathode follower with printed circuit board design.
  82. Long Tail Pair
  83. Hickok 752A 5AR4 rectifier test?
  84. Shunt Capacitance in Output Transformer
  85. LTP vs single first stage
  86. 6n23 v. 6dj8 v. 6fq7
  87. newer than noob looking for advice on RH84
  88. 300B failed again
  89. No output transformer tube amp
  90. curious about a curious connection
  91. tube crossover project - http://www.pmillett.com/tube_active_crossover.htm
  92. My new "vintage" tube radio
  93. help designing 6L6G S.E. amplifier
  94. SVT output iron as single ended
  95. is 6s2p actually equiv to 8532?
  96. Grundig H&B 6007 tube power supply - Repair or gut for parts?
  97. Quad 22 stereo balance/ filter problem
  98. KR 2A3: problems?
  99. Philco F-1801
  100. KT88 Stereo Schematic and help
  101. Where should I connect ground reference for heater supply?
  102. Chassis size and layout question
  103. May tubes amps
  104. 12SX7 coin base tubes? Fake?
  105. Toroidal transformer on tube amp
  106. Current Mirrors in a balanced preamp
  107. Half-mu stage (or SRPP) w/6DJ8/6922/ECC88 tubes at Low B+ voltage?
  108. High-end Tube amp kits (all-included)
  109. High Current Maida
  110. High Current Maida
  111. Balanced tube preamp schematic or kit?
  112. Trying to find tube component supplier, lost webite ...VT42.com or something like it.
  113. 2A3 PP Can my OPT do the job?
  114. 1626 / 6j4 tube amp
  115. suggestions for driver tube for 2A3
  116. Does anyone know the specs for this Chinese pentode
  117. SiliconRay Kits
  118. Advice needed for hum reduction
  119. low voltage dc tube phase splitter/12AU7
  120. Damper rectifier tubes & voltage doubler
  121. Overheating Resistors on DAC board- "HELP NEEDED"
  122. opt primary inductance and secondary load
  123. SOS-HELP-AIDE-HILFE on " DAC dilema"
  124. Transformer Mounting Direction
  125. HELP! new to working on tube amps and need help with project im going to take on
  126. Fisher 500c radio hum
  127. Modify Power supply for Tube Amp
  128. Unusual amps..
  129. Help with Preamp/Amp hum
  130. Question about step up in 300B PP amp
  131. How do we reach PMillet?
  132. Please help me with a few questions and a idea for an old PA
  133. Edcor CXSE25-8-2.5K single ended UL transformer
  134. Voltseconds ccs for the K-12 kit
  135. The Torpedo Parafeed Headphone Amplifier
  136. Tube Rectifiers do sound different
  137. 6922, a 6DJ8 replacement??
  138. QB2/250 amplifier
  139. WE 350B and 311A
  140. Single ended 300b's
  141. More power!
  142. How the magnetic affect the sound of tube amplifier
  143. Valves replacement for Copland CT402
  144. Changing valve damage
  145. Tube phono preamplifier by 12ax7
  146. Altec 353A oddity
  147. I need to lose that Hummmm
  148. Reduce B+ with zener
  149. triode and pentode 6v6 in parallel
  150. How to make mic input transformer 150:50KCT for mic tube preamp???
  151. Webcor 12AU7 is it a Mullard?
  152. Everett AO48
  153. Resurrecting old tubes
  154. Lumley ST70 Output impedance change and other questions
  155. AC Heater reference to B+
  156. Two tube class a2 se trioded el84 with 12dw7 cathode follower driver?
  157. Overly complicated 1.6A CCS Heater Supply
  158. Hibryd amplifier with tube/valve ECC88 (PCC88) and chipamp LM1875
  159. Tube/Valve buffer with ECC88
  160. High(er) gm octal pentodes?
  161. Shielding Characteristics of Copper Clad PCB
  162. Starting a Meixing MC34-A07 modification project
  163. 6V SLA Dropping resistor for a 5VDC Filament Supply
  164. Wind (Thermionic?) noise, and other strange sounds
  165. Suggestions for an tube-amp with KT88
  166. SE-100 Golden Tube Audio - REPAIR
  167. Power amp vs preamp topology
  168. EL34 Characteristics for Ug2 400V
  169. old Heathkit amp
  170. Toroid OPT for 300B
  171. Help: Connecting two Fluke meters in series
  172. Preamp Volume Controls
  173. Output SE Transformer Question
  174. Vintage electrolytic capacitors
  175. Silver bearing grease for tube sockets
  176. Should I try adding a small Tube Preamp to a DTA-100?
  177. IS 6N6P A DIRECT REPLACEMENT FOR ECC88CC ?
  178. Dynaco stereo 70 look alike
  179. Vacuum Tube factory: For Sale!
  180. Does anybody know anything about this German console
  181. Heater dillema for multi chassis phono stage.
  182. Q: lifespan of JJ ECC99 tubes
  183. Cold solder joint?
  184. Input Impedance/Buffers
  185. Old capacitors..Comments..
  186. Shizuki capacitors?
  187. Spectrum Analyzer: What to get ? What to look for in a spectrum analyzer ?
  188. Amperex Orange Globe 12ax7 ,Brimar cv4004
  189. Question about transformer lamination stacking techniques
  190. line preamplifier with 6c10
  191. Homebrew Toroidal Output Transformer
  192. Line output tube
  193. MJK's SSSchadeode
  194. Any one know were to buy the fu-80 tube?
  195. Maida Regulator PCB
  196. Suggestions for 7k output transformers.
  197. Help: Fluke 87V Meter Calibration
  198. Searching for Primaluna Prologue Three schematic
  199. Pentode Regulation Question
  200. pentodes with CCS load?
  201. Are these tube PCBs any good ?
  202. china 6L6 SEdiy
  203. What are your opinions of the ST-70 and St-120
  204. Baffle Step Compensation Tube Circuit
  205. 6L6 to 7027 cathode resistor value
  206. PCB to mount snapmout electrolytic capacitors
  207. Dared MC-7P Upgrades
  208. adapter to go from 6L6 to 807
  209. My Experience with a Jolida 202s (SoFar..)
  210. Cathodyne gain calculator link
  211. Dynakit ST-35?
  212. PSUD modeling old amp PS fails.
  213. Fisher 800 push-pull output stage not symmetrical. Why?
  214. Question of D3a driving 300B
  215. old console amp
  216. st35 vs millett DCPP vs tubelab simple SE
  217. New Tim Mellows OTL project
  218. Melted my mains transformer - Where to find replacement ?
  219. Strange.................
  220. Effect of high mains voltage?
  221. Kent SL 21 Tube head need help!!
  222. Hexfred or SIC rectifiers in choke supplies
  223. 'Strange' bass boost with impedance transformer
  224. Did my tubes go south ?
  225. Use of Tango NN-600-600 Transformers ?
  226. Anyone have an explanation for break(burn)in
  227. The Right Tube & TRannie
  228. 6SL7 / 6SN7 Phono
  229. Tube integrated amp in China.
  230. Power supply issues with Borbely style 12AU7/MOSFET hybrid
  231. heater elevation ground point
  232. Edison 12, can anyone help?
  233. Delay B+ using relay?
  234. New Schematic Linestage Tube Preamp using EF86 & 12AX7
  235. Phonostage (WAD clone) and 12B4A Preamp Build
  236. Interstage coupling feedback
  237. Just received a Yaqin MC-10T and have a couple of questions.
  238. Amplifier Troubleshooting
  239. Audio Preamplifier with PCC88
  240. Need Help With These TriodeDick Preamp Scematics
  241. I need help with my amp project
  242. Looking for unbalanced to balanced transformer
  243. Power Transformer Question
  244. My First Tube Amp Project S5 K-12G
  245. 6E2 vacuum tube compatibility
  246. Tube condenser microphone help!
  247. Audio transformer feedback loop
  248. yaqin vk amp without the loudness button uk version
  249. PP driver stage with local feedback
  250. Leader LAG-120B Audio Generator Manual Wanted

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