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

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