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  1. Circuit query
  2. 845/211 driver circuits
  3. A question about the Malanz 7
  4. Looking for four KT90 Ei
  5. Dynaco PAS transformer breakdown
  6. where do you find your tube treasures
  7. 5670 Thoughts?
  8. looking to build or buy a cheep preamp
  9. Trying to achieve 25-30 watts... help please!
  10. RCA Reel to Reel Conversion??
  11. AA5 Tube Radio Design using 2010 Techniques
  12. I found a use for surplus tubes
  13. Edcor CXPP-30-MS-3.8K OPT
  14. Which tube does my amp use? 845 or 211
  15. Coupling cap replacement in series?
  16. electronique practique
  17. New PNP HV tranny for anode CCS
  18. tube reliability
  19. Hybrid dreams
  20. Triode Electronics 30W SE Transformer
  21. Small Size Output Transformers
  22. headphone amp with 7025?
  23. Separation of preamp and power amp
  24. Aikido 9pin with 6n1p and 6n6p as Headphone
  25. PreAmp output transformers
  26. Line-out on tubes
  27. Would this scheme work ?
  28. differential cascode patented in 2007
  29. Question about AMP185 Rectifier Circuit
  30. correct heater wiring
  31. Speaker snap or crack (no pop)
  32. Very long cables
  33. Help! 2A3 SET quit after hot restart
  34. INTEGRATED HYBRID AMP WITH NO LOAD
  35. 12AX7 preamp on 375V
  36. The Blue Velvet Line Preamp with 7193 instead of 6SN7
  37. Increase idle current on my KT77's?
  38. Yet another nutty idea - don't say I didn't warn
  39. need someone to run a sim in PSUD2...my PC is down and my MAC wont runt the program!!
  40. Building an B-15-inspired amp
  41. China preamp Xiang Sheng 768A
  42. RE: Fisher 200 tube amp fuse blowing issue
  43. How do you match output tubes?
  44. Best Dyna ST-70 rebuild kit?
  45. Help with tube wiring
  46. st70 problem
  47. Help with info on old valve amp
  48. Exceeding V-heater-cathode
  49. Cayin/Sparks A- 50T schematic.
  50. Looking for Bi siemens datasheet
  51. Transformers, transformers, transformers...
  52. Need ideas for my 6V6 from 1946 Blues / rockabilly
  53. Quasi complimentary output stage?
  54. 4ohm output transformer with 8ohm speaker
  55. First DIY project for a good power Amplifier
  56. Cherry red plates
  57. DIY triode
  58. First post/build
  59. New Transformer Vendor In Belgium
  60. KT88 grid stopper
  61. Connecting valve shields to earth
  62. Shindo MAZERIS BELLEVUS MODEL 454-2xAttenuator-How works this Circuit? 6067+12BH7
  63. Fixed bias failure B+ switch off protection
  64. Uses for Quicksilver Transformers
  65. SE amp problem
  66. EL-34 to 6P3S-E
  67. 6922 sepp with Balanced Gains
  68. tubes for these OPT?, pri 1.75Kohm, sec 2.5, 4, 8ohm, taps 20%, weight 4Kg
  69. Turning a 6.3 V secondary into a 5 V secondary on an Antek 2T350
  70. gridchokes/output caps
  71. Can I build an MC30?
  72. Cathodyne: Can someone please help me fill in the blanks ?
  73. help hovland hp200
  74. 6SL7 and 6AS7 PP amplifier, design advice needed
  75. Project: Baldwin Tube Amp...
  76. Power Supply Input Capacitor - JE simple 45 question
  77. Tube output: Voltage or Current source?
  78. Edcor's new E-store website.....finally!
  79. Help complete the 300B schematic
  80. Confusion about a 5Y3GT rectifier
  81. Need advice on 300B circuit
  82. PCB in components
  83. new 6080 dc pp
  84. Single ended to balanced Aikido with mosfets in buffer position
  85. about 83 mercury rectifier
  86. Aikido Zo Calculation
  87. Pavane/ Psvane 845, 805, 211, 12AX7, 12AU7, 12AT7 and EL84
  88. Is this Telefunken fake or OEM?
  89. About Hmmmmm
  90. PRE-AMP PROJECT SRPP + HEADPHONE AMP
  91. 6BN11 vs 6CB6
  92. Is output stage local feedback necessary?
  93. Tube Longevity
  94. Power triode drive current requirements
  95. OPT Selection Question
  96. Recommend me a 6V6 P-P schematic
  97. Requesting advice on a pre-amp build. I'm working on asking realistic questions.
  98. 13e1 se "shade" some questions
  99. My first build VTA ST-120
  100. World Wide Audio, model: HBP-97a, Hybrid Power Amplifier - info needed
  101. DIY 50C5 mini amp...
  102. So you think you have cool tubes?????
  103. Layout
  104. Looking to ID this amp
  105. Help me to make tube amply
  106. CAT SL1 SIGNATURE schematik phono
  107. Have anyone built this 6V6 amp?
  108. GU-50 in Single-Ended Triode Configuration - What bias points?
  109. DC coupling on a LTP? Opinions and help needed on Fred's design.
  110. Power Selection - Help Needed
  111. Which speaker with a 1/4W tube amp?
  112. 6973 VS 6CZ5 substitute
  113. Third Reich tubes
  114. Hello...and another ST-70 project.
  115. Home theater magic smoke...smoked and I think I heard a mirror crack...
  116. Scott LK48-B restoration
  117. 3 - 12AU7 Preamp. Is there such an animal?
  118. 300b filament
  119. resistor 880 ohms cathode
  120. Anyone have a Bugle Boy logo
  121. Change of circuit from triode to tetrode
  122. Need upgrade info for my Atma-Sphere Novacron Amps
  123. JJ Kt77 Bias?
  124. tube rectified psu
  125. HELP!: my SET amp was turned off without a load and now it sound veiled!
  126. 5842 grid leak
  127. AMI Jukebox speaker impedence question
  128. Advice Needed: "Flabby" Amp Low-End
  129. Aikido transformer coupled output
  130. 12BH7A driver stage help
  131. Audio drive to g2 connected to g1 via 15K0
  132. KT88 SE Complete Kit
  133. Any high-end 6BM8 push pull tube amp schematic ?
  134. How a Triode Works
  135. EL3N substitute
  136. Magnavox AMP-185
  137. Best 6V6G that won't get me divorced..
  138. Shorted EL34 ?
  139. ARC VS60 hum in speaker
  140. Need help for a bias circuit
  141. Eico HF20 Output Txr Questions
  142. A Radford STA15 restoration story
  143. Tube Testing in DC Area
  144. Thorens PR24
  145. Newbie here with a couple questions
  146. 300B SwitchMode filament supply
  147. Mixed bias for balancing unmatched tubes in PPP?
  148. My First DIY Experience: An Aikido/Tetra Preamp
  149. how to test chokes for current and voltage
  150. pictures miniblok 1 and miniblok 2 by fred nachbaur
  151. Help with Aikido Preamp+class d amp
  152. will a PTX without center tap work?
  153. Anyone have information on 300B silvertone tube
  154. 6P14P push pull with low output
  155. passive 30Hz-20kHz Bandpass filter for tube preamp?
  156. My First Amp
  157. Frank's 6sn7 preamp
  158. My new 300B Amp
  159. help troubleshooting gradually distorting tube amp (dropping b+ voltage when hot)
  160. Tube Gear Supply/Surplus in Houston Area
  161. What 2a3 ?
  162. long tailed pair - need more gain
  163. how to bypass the volume pot on my SET amp?
  164. 2 stage AIKIDO
  165. Guys please help me with my Jolida 102B!
  166. Philbrick GAP/R K2-W question
  167. First time baby Huey amplifier build
  168. 6LB6's....
  169. Meng 6PI Biasing Question
  170. AIKIDO LV WON'T START
  171. Under rating of Vertical Sweep Tubes
  172. Simple 845 tube monoblock design
  173. Running on filament only
  174. soft stat
  175. BJT Bias?
  176. Preamp Squeal
  177. Hammond L101 compensation cap
  178. Powering a headphone amplifier with DC filament supply
  179. new to this
  180. miniblok 1 voltage problem
  181. How will this affect my amp?
  182. Tetra Phono Builders...got problems!
  183. yagoolar's tube amp projects
  184. Base material of GEC KT88 Feb 1960
  185. Headphone amp with 6n2p valve on 12V
  186. pcc189 for audio use
  187. Reading material
  188. 2A3 rectifier
  189. 866a valve test
  190. Anybody in the Knoxville area?
  191. Looking for simple Push-Pull tricks (from Baby Huey) #1
  192. Why wire an output transformer as autoformer ? (parafeed)
  193. Measuring unwanted grid current
  194. Tube companies
  195. Hi Performance Pre amp
  196. HH Scott Type 209 Amp
  197. 6l6gb PP w/fixed bias?
  198. Holy cow! Can anyone tell me why this wire is so pricey?
  199. EL34B 6N9P 5Z3P amplifier kit - any thoughts on schematic?
  200. 4 x EL84 in UL PP, 470 B+!! is this right
  201. What amp is this?
  202. PS Setup For Testing
  203. OTL designed by Tim Mellow with 4 6C33C?
  204. Quick question on this schematic
  205. Variac, how to ?
  206. Tube data sheets - inaccuracy
  207. Benny's new ForeWatt SRPP pre amplifier
  208. OddWatt PP UL amplifier from scratch
  209. OPT Impedance
  210. Rectifier Valves
  211. WE311 amp
  212. Sherwood S8000 transformers
  213. yaqin MS-12B Search for Diagrams
  214. EICO HF-30 - Schematic
  215. 12AU7 Phono Stage
  216. How to install a motor run capcitor
  217. Sanity check on B+ regulator
  218. 6B4G PPP idea
  219. First OTL breadboarded
  220. New amp build
  221. Tube Parametric EQ - Idea looking for clarification
  222. DHT heater supply
  223. MC/MM Phono Pream PCB
  224. Help Identifying Old Westinghouse Tube Amp?
  225. GM70 SE Amplifier
  226. OPT considerations
  227. Help - the pre amp I made is not working!
  228. Aikido tube connections.
  229. EL34 PP output tranny questions
  230. DC heater voltage 6 volts or 12 volts?
  231. Dynaco st70....Can I use 6 ohm speakers?
  232. Aikido vs. Foreplay
  233. I found a valve amp in my garage...
  234. Separate PSU to Amp connection
  235. cary SLA 70
  236. Help!!! My Audioromy FU29 amplifier was fried!
  237. Help!!! My Audioromy FU29 amplifier was fried!
  238. Take a look at my transformers
  239. miniblok 2 distorted sound
  240. Appropriate replacement OPT for Fisher 30-A with 2.5Ohm Secondary
  241. For hk citation II owners\experts.
  242. Dynakit Mark III amplifier
  243. Transformer in reverse current doubt
  244. CELLINI-2 a hybrid
  245. Need help starting
  246. ARC (Audio Research) VT50
  247. mixed mode bias
  248. 2C52 datasheet
  249. Yaqin SD-CD2 tube buffer - upgrading stock tubes
  250. 12v Tube amp

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