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  1. European Made 6080/6AS7
  2. PFL200, what can I use them to?
  3. 7W7 tube - how it competes with other pentodes as driver?
  4. 1959 Blaupunkt receiver capacitors -Newbie
  5. i have one 5672 tube (new)
  6. 12ax7 pre amp + solid state power amp
  7. Preamp for Tim Mellow's 6C33C OTL
  8. Power supply buzz
  9. How to make a PCB with 15 years old Positiv 20
  10. Circuit query
  11. 845/211 driver circuits
  12. A question about the Malanz 7
  13. Looking for four KT90 Ei
  14. Dynaco PAS transformer breakdown
  15. where do you find your tube treasures
  16. 5670 Thoughts?
  17. looking to build or buy a cheep preamp
  18. Trying to achieve 25-30 watts... help please!
  19. RCA Reel to Reel Conversion??
  20. AA5 Tube Radio Design using 2010 Techniques
  21. I found a use for surplus tubes
  22. Edcor CXPP-30-MS-3.8K OPT
  23. Which tube does my amp use? 845 or 211
  24. Coupling cap replacement in series?
  25. electronique practique
  26. New PNP HV tranny for anode CCS
  27. tube reliability
  28. Hybrid dreams
  29. Triode Electronics 30W SE Transformer
  30. SMALL SIZE OUTPUT TRANSFORMERS
  31. headphone amp with 7025?
  32. Separation of preamp and power amp
  33. Aikido 9pin with 6n1p and 6n6p as Headphone
  34. PreAmp output transformers
  35. Line-out on tubes
  36. Would this scheme work ?
  37. differential cascode patented in 2007
  38. Question about AMP185 Rectifier Circuit
  39. correct heater wiring
  40. Speaker snap or crack (no pop)
  41. Very long cables
  42. Help! 2A3 SET quit after hot restart
  43. INTEGRATED HYBRID AMP WITH NO LOAD
  44. ECC88 symbol problem in TINA-TI
  45. 12AX7 preamp on 375V
  46. The Blue Velvet Line Preamp with 7193 instead of 6SN7
  47. Increase idle current on my KT77's?
  48. Yet another nutty idea - don't say I didn't warn
  49. Need help calibrating a Hickok 6000 Chicago
  50. need someone to run a sim in PSUD2...my PC is down and my MAC wont runt the program!!
  51. Building an B-15-inspired amp
  52. China preamp Xiang Sheng 768A
  53. RE: Fisher 200 tube amp fuse blowing issue
  54. How do you match output tubes?
  55. Best Dyna ST-70 rebuild kit?
  56. Help with tube wiring
  57. st70 problem
  58. Help with info on old valve amp
  59. Exceeding V-heater-cathode
  60. Cayin/Sparks A- 50T schematic.
  61. Looking for Bi siemens datasheet
  62. Transformers, transformers, transformers...
  63. Need ideas for my 6V6 from 1946 Blues / rockabilly
  64. Quasi complimentary output stage?
  65. 4ohm output transformer with 8ohm speaker
  66. First DIY project for a good power Amplifier
  67. Cherry red plates
  68. DIY triode
  69. First post/build
  70. New Transformer Vendor In Belgium
  71. KT88 grid stopper
  72. Connecting valve shields to earth
  73. Shindo MAZERIS BELLEVUS MODEL 454-2xAttenuator-How works this Circuit? 6067+12BH7
  74. Fixed bias failure B+ switch off protection
  75. Who can tell me where to buy Caddock MS220
  76. Uses for Quicksilver Transformers
  77. SE amp problem
  78. EL-34 to 6P3S-E
  79. 6922 sepp with Balanced Gains
  80. What path to choose for Hamonica amplifier?
  81. tubes for these OPT?, pri 1.75Kohm, sec 2.5, 4, 8ohm, taps 20%, weight 4Kg
  82. Turning a 6.3 V secondary into a 5 V secondary on an Antek 2T350
  83. gridchokes/output caps
  84. Can I build an MC30?
  85. Cathodyne: Can someone please help me fill in the blanks ?
  86. help hovland hp200
  87. 6SL7 and 6AS7 PP amplifier, design advice needed
  88. Project: Baldwin Tube Amp...
  89. Power Supply Input Capacitor - JE simple 45 question
  90. Tube output: Voltage or Current source?
  91. Edcor's new E-store website.....finally!
  92. Help complete the 300B schematic
  93. Confusion about a 5Y3GT rectifier
  94. Need advice on 300B circuit
  95. PCB in components
  96. new 6080 dc pp
  97. Single ended to balanced Aikido with mosfets in buffer position
  98. Simple LED power indicator light circuit?
  99. about 83 mercury rectifier
  100. Aikido Zo Calculation
  101. Pavane/ Psvane 845, 805, 211, 12AX7, 12AU7, 12AT7 and EL84
  102. Is this Telefunken fake or OEM?
  103. About Hmmmmm
  104. PRE-AMP PROJECT SRPP + HEADPHONE AMP
  105. 6BN11 vs 6CB6
  106. Is output stage local feedback necessary?
  107. Tube Longevity
  108. Power triode drive current requirements
  109. OPT Selection Question
  110. Recommend me a 6V6 P-P schematic
  111. Requesting advice on a pre-amp build. I'm working on asking realistic questions.
  112. So, im going to replace the Alps with a PEC...someone help?
  113. 13e1 se "shade" some questions
  114. My first build VTA ST-120
  115. World Wide Audio, model: HBP-97a, Hybrid Power Amplifier - info needed
  116. DIY 50C5 mini amp...
  117. So you think you have cool tubes?????
  118. Layout
  119. Looking to ID this amp
  120. Help me to make tube amply
  121. CAT SL1 SIGNATURE schematik phono
  122. Have anyone built this 6V6 amp?
  123. GU-50 in Single-Ended Triode Configuration - What bias points?
  124. DC coupling on a LTP? Opinions and help needed on Fred's design.
  125. Power Selection - Help Needed
  126. Which speaker with a 1/4W tube amp?
  127. 6973 VS 6CZ5 substitute
  128. Third Reich tubes
  129. Hello...and another ST-70 project.
  130. Home theater magic smoke...smoked and I think I heard a mirror crack...
  131. Scott LK48-B restoration
  132. 3 - 12AU7 Preamp. Is there such an animal?
  133. 300b filament
  134. resistor 880 ohms cathode
  135. Anyone have a Bugle Boy logo
  136. Change of circuit from triode to tetrode
  137. Need upgrade info for my Atma-Sphere Novacron Amps
  138. Whats Vintage Testing Equipment Do YOU Have/Use?
  139. JJ Kt77 Bias?
  140. tube rectified psu
  141. HELP!: my SET amp was turned off without a load and now it sound veiled!
  142. 5842 grid leak
  143. AMI Jukebox speaker impedence question
  144. Advice Needed: "Flabby" Amp Low-End
  145. Aikido transformer coupled output
  146. Audio measurements on tube amp. ? look here
  147. 12BH7A driver stage help
  148. Audio drive to g2 connected to g1 via 15K0
  149. KT88 SE Complete Kit
  150. Any high-end 6BM8 push pull tube amp schematic ?
  151. How a Triode Works
  152. EL3N substitute
  153. Magnavox AMP-185
  154. Best 6V6G that won't get me divorced..
  155. Shorted EL34 ?
  156. ARC VS60 hum in speaker
  157. Need help for a bias circuit
  158. Eico HF20 Output Txr Questions
  159. A Radford STA15 restoration story
  160. Tube Testing in DC Area
  161. Thorens PR24
  162. Newbie here with a couple questions
  163. 300B SwitchMode filament supply
  164. Mixed bias for balancing unmatched tubes in PPP?
  165. My First DIY Experience: An Aikido/Tetra Preamp
  166. how to test chokes for current and voltage
  167. pictures miniblok 1 and miniblok 2 by fred nachbaur
  168. Help with Aikido Preamp+class d amp
  169. will a PTX without center tap work?
  170. Anyone have information on 300B silvertone tube
  171. 6P14P push pull with low output
  172. passive 30Hz-20kHz Bandpass filter for tube preamp?
  173. My First Amp
  174. Frank's 6sn7 preamp
  175. My new 300B Amp
  176. help troubleshooting gradually distorting tube amp (dropping b+ voltage when hot)
  177. Tube Gear Supply/Surplus in Houston Area
  178. What 2a3 ?
  179. long tailed pair - need more gain
  180. how to bypass the volume pot on my SET amp?
  181. 2 stage AIKIDO
  182. Guys please help me with my Jolida 102B!
  183. Philbrick GAP/R K2-W question
  184. First time baby Huey amplifier build
  185. 6LB6's....
  186. Meng 6PI Biasing Question
  187. AIKIDO LV WON'T START
  188. Under rating of Vertical Sweep Tubes
  189. Simple 845 tube monoblock design
  190. Running on filament only
  191. soft stat
  192. BJT Bias?
  193. Preamp Squeal
  194. Hammond L101 compensation cap
  195. Powering a headphone amplifier with DC filament supply
  196. new to this
  197. miniblok 1 voltage problem
  198. How will this affect my amp?
  199. Tetra Phono Builders...got problems!
  200. yagoolar's tube amp projects
  201. Base material of GEC KT88 Feb 1960
  202. Headphone amp with 6n2p valve on 12V
  203. pcc189 for audio use
  204. Reading material
  205. 2A3 rectifier
  206. help calibrating a mercury model 1000 tube tester
  207. 866a valve test
  208. Anybody in the Knoxville area?
  209. Looking for simple Push-Pull tricks (from Baby Huey) #1
  210. Why wire an output transformer as autoformer ? (parafeed)
  211. Measuring unwanted grid current
  212. Tube companies
  213. Hi Performance Pre amp
  214. HH Scott Type 209 Amp
  215. 6l6gb PP w/fixed bias?
  216. Holy cow! Can anyone tell me why this wire is so pricey?
  217. EL34B 6N9P 5Z3P amplifier kit - any thoughts on schematic?
  218. 4 x EL84 in UL PP, 470 B+!! is this right
  219. What amp is this?
  220. PS Setup For Testing
  221. OTL designed by Tim Mellow with 4 6C33C?
  222. Quick question on this schematic
  223. Variac, how to ?
  224. Tube data sheets - inaccuracy
  225. Benny's new ForeWatt SRPP pre amplifier
  226. OddWatt PP UL amplifier from scratch
  227. OPT Impedance
  228. Rectifier Valves
  229. WE311 amp
  230. Sherwood S8000 transformers
  231. yaqin MS-12B Search for Diagrams
  232. EICO HF-30 - Schematic
  233. 12AU7 Phono Stage
  234. How to install a motor run capcitor
  235. Sanity check on B+ regulator
  236. 6B4G PPP idea
  237. First OTL breadboarded
  238. New amp build
  239. Tube Parametric EQ - Idea looking for clarification
  240. DHT heater supply
  241. MC/MM Phono Pream PCB
  242. Help Identifying Old Westinghouse Tube Amp?
  243. GM70 SE Amplifier
  244. OPT considerations
  245. Help - the pre amp I made is not working!
  246. Aikido tube connections.
  247. EL34 PP output tranny questions
  248. DC heater voltage 6 volts or 12 volts?
  249. Dynaco st70....Can I use 6 ohm speakers?
  250. Aikido vs. Foreplay

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