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  1. Audio Research Dual 75 - Low Bias
  2. 6N3 SRPP + 6N5P Cathode Follower HPA Testing
  3. 6N16 headphone amplifier
  4. 5k plate to plate, el34 triode strapped, 400v b+
  5. russian penthodes 6J2P-EB and 6J9P.
  6. mA meter drags the circuit down
  7. Valve stage coupling capacitor leakage?
  8. Carvin Transformer
  9. Modifying the Lowther Club HK Jazz 6L6 ($449 SET amp)
  10. RCA 6V6PP amp schematic (Schade fb)
  11. 25W Class A Hybrid Amp
  12. help testing gz32 gz34
  13. A BeamKido?
  14. Zeners and voltage regulation
  15. A2 positive bias push pull possible?
  16. EL34 burn out on Yaqin MC10T
  17. input transformer and impedance question
  18. Options for 300mA tube rectifiers
  19. Electrical flow
  20. 5AR4 @ 250mA
  21. newbie with a choke question
  22. ROCKOAL JUKEBOX 1458
  23. Who can help to recognize this tube preamp?
  24. DIY High power Audio Amplifier from Heathkit SB200
  25. ECL82 amplifier help
  26. 6146B SPICE model wanted
  27. how to install a bias meter in a cathode bias amp
  28. Stuck... Output tube for Single ended?
  29. Aikido Octal Headphone amp
  30. silvertone organ amp conversion. 4704
  31. Impedance bridging
  32. Philips AG-9016 frequency range?
  33. fuse voltage rating?
  34. Grounding issue between turntable and tube amp
  35. Great sounding KT88 amp?
  36. Designing a Gomes i/v stage for tda1541a
  37. choke input power supply
  38. Need Help with New Amp Build, Ugly signals
  39. Amplifier Saftey
  40. Cary SLM100 question (older brand)
  41. 6n18p 6n1p 6n2p project needed
  42. Heater wiring idea?
  43. 300B Amp Testing
  44. New amp build
  45. Bamboo chassis 6P3P SE
  46. 6N23P-EB SRPP DAC output stage.
  47. Packard Plamor Schematic needed
  48. Hickok 600A
  49. Opinion; Alternate input tube socket
  50. Very Simple Attenuator For Audio Card
  51. Switchable PI, Paraphase,Cathodyne, LTP.
  52. Hmm... 4-1000As
  53. Bootstrapped anode
  54. Selecting the correct output transformer/primary impedance
  55. Caddock MK-132 or Mills MRA-12 as plate R?
  56. Minimum rating for stepdown transformer
  57. 6L6 Dared VP-20 issues
  58. Potentiometer Desigations/Codes
  59. 6L6 SE Tube Amp Kit on eBay... opinions?
  60. Building a VT46/PT25H PP amp
  61. Help choosing Sweat Peach FU50 or KT100
  62. New FM-3 Boards
  63. Unity-Coupled amp project
  64. Rectifier injecting noise into heater supply
  65. Tube base failures
  66. 1624 as DHT triode outputs
  67. Will this 2 stage DC DHT cct idea work?
  68. Help with Output Transformer
  69. multi cap verses add on power supply board
  70. 6AS7 hybride CCS
  71. Decware Zbox - looking for Tube buffer mods to reduce buzz
  72. Decware Zbox - looking for Tube buffer mods to reduce buzz
  73. Eico-ST-70 Advice
  74. Choosing Btw 2 EL34 China Tube Amps
  75. Looking for the GA article.
  76. Tube amp left ch. hum
  77. Did i model this PT correctly(psud2)?
  78. Help with the modifications of my tube-amp
  79. detailed photos of RH 84 build?
  80. heathkit aa-191
  81. Which KT-88 tube?
  82. 10m45s cascode diagram?
  83. What amp can make use of these large caps?
  84. Leslie 720 used with stereo keyboard
  85. Tube testers : sorting out settings for the Jackson 648
  86. Question about Shishido 2A3
  87. A micro-programmable tube tracer/tester
  88. amp with the FD422
  89. ST-35 C-1 Capacitor on PC-13 board.
  90. Transformer winding examples!!!!
  91. sansui sm-33
  92. How to mod ASL MG OTL 32 DT?
  93. 300b problem
  94. Audio Research M100s
  95. E83CC in PI or Preamp
  96. Current Dumping Amplifier
  97. Quicksilver 8417 Bias
  98. PtP wiring: Solidcore unshielded cable
  99. Removing a motor from a tube turntable.
  100. Why do I go to hamfests?
  101. Circlotron Amplifier Advice Needed
  102. Traces inside tube?
  103. Hybrid for Zobsky
  104. help identifying telefunken tubes
  105. 5U4GB Tube Power Supply Schematic
  106. Copland CTA-401 - early layout ?
  107. AVO CT160: Testing dual triodes
  108. Need to run heaters in output tubes, remove plate and screen safe?
  109. 1AG4 Direct Heated Pentode, Output
  110. grid stopper and grid choke on pentode input
  111. Has anyone tryied the GuiGuang 300B?
  112. Honeywell Mercury Tube?
  113. Tube audio-phoolery -- more teats on bulls
  114. Strange tube
  115. Adding a Headphone output to my amp.
  116. 6CG7 Phono/ linestage
  117. RH84 Build from old Dumont console
  118. 6N16 12x preamp srpp/cathode follower with printed circuit board design.
  119. Long Tail Pair
  120. Hickok 752A 5AR4 rectifier test?
  121. Shunt Capacitance in Output Transformer
  122. LTP vs single first stage
  123. 6n23 v. 6dj8 v. 6fq7
  124. newer than noob looking for advice on RH84
  125. 300B failed again
  126. No output transformer tube amp
  127. curious about a curious connection
  128. tube crossover project - http://www.pmillett.com/tube_active_crossover.htm
  129. My new "vintage" tube radio
  130. help designing 6L6G S.E. amplifier
  131. SVT output iron as single ended
  132. is 6s2p actually equiv to 8532?
  133. Grundig H&B 6007 tube power supply - Repair or gut for parts?
  134. Quad 22 stereo balance/ filter problem
  135. KR 2A3: problems?
  136. Philco F-1801
  137. KT88 Stereo Schematic and help
  138. Where should I connect ground reference for heater supply?
  139. Chassis size and layout question
  140. May tubes amps
  141. 12SX7 coin base tubes? Fake?
  142. Toroidal transformer on tube amp
  143. Current Mirrors in a balanced preamp
  144. Half-mu stage (or SRPP) w/6DJ8/6922/ECC88 tubes at Low B+ voltage?
  145. High-end Tube amp kits (all-included)
  146. High Current Maida
  147. High Current Maida
  148. Balanced tube preamp schematic or kit?
  149. Trying to find tube component supplier, lost webite ...VT42.com or something like it.
  150. 2A3 PP Can my OPT do the job?
  151. 1626 / 6j4 tube amp
  152. suggestions for driver tube for 2A3
  153. Does anyone know the specs for this Chinese pentode
  154. SiliconRay Kits
  155. Advice needed for hum reduction
  156. low voltage dc tube phase splitter/12AU7
  157. Damper rectifier tubes & voltage doubler
  158. Overheating Resistors on DAC board- "HELP NEEDED"
  159. opt primary inductance and secondary load
  160. SOS-HELP-AIDE-HILFE on " DAC dilema"
  161. Transformer Mounting Direction
  162. HELP! new to working on tube amps and need help with project im going to take on
  163. Fisher 500c radio hum
  164. Modify Power supply for Tube Amp
  165. Unusual amps..
  166. Anyone make a guitar amp from an EA-3?
  167. Help with Preamp/Amp hum
  168. Question about step up in 300B PP amp
  169. How do we reach PMillet?
  170. Please help me with a few questions and a idea for an old PA
  171. nos 5y3wgt in 5e3
  172. Edcor CXSE25-8-2.5K single ended UL transformer
  173. Voltseconds ccs for the K-12 kit
  174. The Torpedo Parafeed Headphone Amplifier
  175. Tube Rectifiers do sound different
  176. 6922, a 6DJ8 replacement??
  177. QB2/250 amplifier
  178. WE 350B and 311A
  179. Single ended 300b's
  180. More power!
  181. How the magnetic affect the sound of tube amplifier
  182. Valves replacement for Copland CT402
  183. Changing valve damage
  184. Tube phono preamplifier by 12ax7
  185. Altec 353A oddity
  186. I need to lose that Hummmm
  187. Reduce B+ with zener
  188. Old Marshall plexi clone problem
  189. triode and pentode 6v6 in parallel
  190. How to make mic input transformer 150:50KCT for mic tube preamp???
  191. Webcor 12AU7 is it a Mullard?
  192. Everett AO48
  193. Resurrecting old tubes
  194. Lumley ST70 Output impedance change and other questions
  195. AC Heater reference to B+
  196. Two tube class a2 se trioded el84 with 12dw7 cathode follower driver?
  197. Overly complicated 1.6A CCS Heater Supply
  198. Hibryd amplifier with tube/valve ECC88 (PCC88) and chipamp LM1875
  199. Tube/Valve buffer with ECC88
  200. High(er) gm octal pentodes?
  201. Shielding Characteristics of Copper Clad PCB
  202. Starting a Meixing MC34-A07 modification project
  203. 6V SLA Dropping resistor for a 5VDC Filament Supply
  204. Wind (Thermionic?) noise, and other strange sounds
  205. Suggestions for an tube-amp with KT88
  206. SE-100 Golden Tube Audio - REPAIR
  207. Power amp vs preamp topology
  208. EL34 Characteristics for Ug2 400V
  209. old Heathkit amp
  210. Toroid OPT for 300B
  211. Help: Connecting two Fluke meters in series
  212. Preamp Volume Controls
  213. Output SE Transformer Question
  214. Vintage electrolytic capacitors
  215. Silver bearing grease for tube sockets
  216. Should I try adding a small Tube Preamp to a DTA-100?
  217. IS 6N6P A DIRECT REPLACEMENT FOR ECC88CC ?
  218. Dynaco stereo 70 look alike
  219. Vacuum Tube factory: For Sale!
  220. Does anybody know anything about this German console
  221. Heater dillema for multi chassis phono stage.
  222. Q: lifespan of JJ ECC99 tubes
  223. Cold solder joint?
  224. Input Impedance/Buffers
  225. Old capacitors..Comments..
  226. Shizuki capacitors?
  227. Spectrum Analyzer: What to get ? What to look for in a spectrum analyzer ?
  228. Amperex Orange Globe 12ax7 ,Brimar cv4004
  229. Question about transformer lamination stacking techniques
  230. line preamplifier with 6c10
  231. Homebrew Toroidal Output Transformer
  232. Line output tube
  233. MJK's SSSchadeode
  234. Any one know were to buy the fu-80 tube?
  235. Maida Regulator PCB
  236. Suggestions for 7k output transformers.
  237. Help: Fluke 87V Meter Calibration
  238. Searching for Primaluna Prologue Three schematic
  239. JCM Build - Hum and Crackle
  240. Silvertone radio to Guitar Amp conversion question.
  241. Pentode Regulation Question
  242. pentodes with CCS load?
  243. Are these tube PCBs any good ?
  244. china 6L6 SEdiy
  245. What are your opinions of the ST-70 and St-120
  246. Baffle Step Compensation Tube Circuit
  247. 6L6 to 7027 cathode resistor value
  248. PCB to mount snapmout electrolytic capacitors
  249. Dared MC-7P Upgrades
  250. adapter to go from 6L6 to 807

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