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  1. Opinions Please
  2. Aikido REV D pcb
  3. New Edcor opt, what would a 150ohm primary be used for?
  4. GM-70, A2, biamping
  5. Espressivo Headphone Amplifier on Budget
  6. Coupling Caps for Aikido ACF Buffer
  7. How to compute current at control grid of power tube?
  8. High voltage SS output, any experiences ?
  9. Back on the forum after a long hiatus 6SN7 Preamp project in the works.
  10. Look for Single Tube scheme
  11. Cathode follower amplifier, push-pull, xformer-coupled
  12. help with "bruce heran" el84 amp S2
  13. Triodes and current flow
  14. Heaters Constant Current Regulator
  15. Driver Tubes: Help Me Decide
  16. Possible tweak
  17. DHT Driving Pentode Output Stage Question
  18. 50C5=50l6; 12av6=12at6
  19. Any experience to drive 805 tube?
  20. Fixed short in a 45
  21. power amp current
  22. Phase inverter/power section
  23. Concerned with current dual 5U4's...
  24. What tube is this?
  25. Signal tube noise!
  26. McIntosh Goodness From Scratch
  27. Marshall Amp strange wiring
  28. Fisher Output Transformer ID
  29. Stepped Attenuator for Air Tight ATC-1
  30. Caps .
  31. The Tube Killer Killer?
  32. Martel FAX-200C
  33. 6n6p headphone amp
  34. 2 caps vs 1 (adding low value teflon to pio)
  35. Ouput voltage of a triode stage on quiescent state should be zero?
  36. Hum Ho
  37. build a OTL (output-transformerless) amplifier
  38. 6v6 PP maggie with Polk SDA 1C
  39. Stromberg-Carlson AU-32 distortion in preamp
  40. Please Help - LF Peaks/Dips & Clipping
  41. Anybody watching this?
  42. Trying to find an unusual schematic posted here this Spring
  43. If you were going to build a OTL?
  44. Protecting a valve variable LM317 power supply
  45. EL34 PP PROJECT
  46. Matching tubes for PP
  47. Calculate triode strapped characteristics from pentode data?
  48. 6922 Loading Question
  49. corrections for LF and HF peaking
  50. 300bSE journey under way
  51. Why shielded tubes
  52. Aikido LV 6N27P SMPS completed
  53. Tube PS question: Acceptable ripple
  54. Back at the 45 SET
  55. Time to replace my 50 year old filter caps...
  56. Amazingly low distortion -- Radford-based design
  57. To ground or not to ground the OPT secondary, that is the question
  58. Ultralinear Observations and Questions
  59. FEEDBACK DELAY TIME
  60. 6SN7 v 6N8P v 6H8C
  61. NOS radio parts awaiting for my pick up!
  62. Toroidal Transformer Cover
  63. VTV 6sn7 line stage project
  64. can something be made using these tubes
  65. Help! Need tube tester info for 6CW4 Nuvistor
  66. Hampton MC preamp
  67. J-fet - tube DAC analog stage
  68. geloso 3270 power amplifier
  69. Belton micalex tube sockets any experience ?
  70. DeathTrap 500 - An Engineer's approach to the 300B SET
  71. My First Power Supply
  72. 5aR4 Rectifier Problem, Help! Little Long
  73. Electrolytic vs Polypropylene cathode
  74. Size of 5Y3 tubes?
  75. 3C24 really is a fine output tube...
  76. Yaqin MC100B Newbie Questions
  77. JE simple 45 SE grid leak resistor question
  78. 26 vs 27
  79. Bypass the tone control
  80. CCS with VN2222L
  81. Adding a ground with a 3 prong cable and connector
  82. European Made 6080/6AS7
  83. PFL200, what can I use them to?
  84. 7W7 tube - how it competes with other pentodes as driver?
  85. 1959 Blaupunkt receiver capacitors -Newbie
  86. i have one 5672 tube (new)
  87. 12ax7 pre amp + solid state power amp
  88. Preamp for Tim Mellow's 6C33C OTL
  89. Power supply buzz
  90. How to make a PCB with 15 years old Positiv 20
  91. Circuit query
  92. 845/211 driver circuits
  93. A question about the Malanz 7
  94. Looking for four KT90 Ei
  95. Dynaco PAS transformer breakdown
  96. where do you find your tube treasures
  97. 5670 Thoughts?
  98. looking to build or buy a cheep preamp
  99. Trying to achieve 25-30 watts... help please!
  100. RCA Reel to Reel Conversion??
  101. AA5 Tube Radio Design using 2010 Techniques
  102. I found a use for surplus tubes
  103. Edcor CXPP-30-MS-3.8K OPT
  104. Which tube does my amp use? 845 or 211
  105. Coupling cap replacement in series?
  106. electronique practique
  107. New PNP HV tranny for anode CCS
  108. tube reliability
  109. Hybrid dreams
  110. Triode Electronics 30W SE Transformer
  111. SMALL SIZE OUTPUT TRANSFORMERS
  112. headphone amp with 7025?
  113. Separation of preamp and power amp
  114. Aikido 9pin with 6n1p and 6n6p as Headphone
  115. PreAmp output transformers
  116. Line-out on tubes
  117. Would this scheme work ?
  118. differential cascode patented in 2007
  119. Question about AMP185 Rectifier Circuit
  120. correct heater wiring
  121. Speaker snap or crack (no pop)
  122. Very long cables
  123. Help! 2A3 SET quit after hot restart
  124. INTEGRATED HYBRID AMP WITH NO LOAD
  125. ECC88 symbol problem in TINA-TI
  126. 12AX7 preamp on 375V
  127. The Blue Velvet Line Preamp with 7193 instead of 6SN7
  128. Increase idle current on my KT77's?
  129. Yet another nutty idea - don't say I didn't warn
  130. Need help calibrating a Hickok 6000 Chicago
  131. need someone to run a sim in PSUD2...my PC is down and my MAC wont runt the program!!
  132. Building an B-15-inspired amp
  133. China preamp Xiang Sheng 768A
  134. RE: Fisher 200 tube amp fuse blowing issue
  135. How do you match output tubes?
  136. Best Dyna ST-70 rebuild kit?
  137. Help with tube wiring
  138. Decided on Gibson GA 20 need layout drawings etc.
  139. st70 problem
  140. Help with info on old valve amp
  141. Exceeding V-heater-cathode
  142. Cayin/Sparks A- 50T schematic.
  143. Looking for Bi siemens datasheet
  144. Transformers, transformers, transformers...
  145. Need ideas for my 6V6 from 1946 Blues / rockabilly
  146. Quasi complimentary output stage?
  147. 4ohm output transformer with 8ohm speaker
  148. First DIY project for a good power Amplifier
  149. Cherry red plates
  150. DIY triode
  151. First post/build
  152. New Transformer Vendor In Belgium
  153. KT88 grid stopper
  154. Connecting valve shields to earth
  155. Shindo MAZERIS BELLEVUS MODEL 454-2xAttenuator-How works this Circuit? 6067+12BH7
  156. Fixed bias failure B+ switch off protection
  157. Who can tell me where to buy Caddock MS220
  158. Uses for Quicksilver Transformers
  159. SE amp problem
  160. EL-34 to 6P3S-E
  161. 6922 sepp with Balanced Gains
  162. What path to choose for Hamonica amplifier?
  163. tubes for these OPT?, pri 1.75Kohm, sec 2.5, 4, 8ohm, taps 20%, weight 4Kg
  164. Turning a 6.3 V secondary into a 5 V secondary on an Antek 2T350
  165. gridchokes/output caps
  166. Can I build an MC30?
  167. Cathodyne: Can someone please help me fill in the blanks ?
  168. help hovland hp200
  169. 6SL7 and 6AS7 PP amplifier, design advice needed
  170. Project: Baldwin Tube Amp...
  171. Power Supply Input Capacitor - JE simple 45 question
  172. Tube output: Voltage or Current source?
  173. Edcor's new E-store website.....finally!
  174. Help complete the 300B schematic
  175. Confusion about a 5Y3GT rectifier
  176. Need advice on 300B circuit
  177. PCB in components
  178. new 6080 dc pp
  179. Single ended to balanced Aikido with mosfets in buffer position
  180. Simple LED power indicator light circuit?
  181. about 83 mercury rectifier
  182. Aikido Zo Calculation
  183. Line out issue - 1965 Ampeg B-18-N
  184. Pavane/ Psvane 845, 805, 211, 12AX7, 12AU7, 12AT7 and EL84
  185. Is this Telefunken fake or OEM?
  186. About Hmmmmm
  187. PRE-AMP PROJECT SRPP + HEADPHONE AMP
  188. 6BN11 vs 6CB6
  189. Is output stage local feedback necessary?
  190. Tube Longevity
  191. Power triode drive current requirements
  192. OPT Selection Question
  193. Recommend me a 6V6 P-P schematic
  194. Requesting advice on a pre-amp build. I'm working on asking realistic questions.
  195. So, im going to replace the Alps with a PEC...someone help?
  196. 13e1 se "shade" some questions
  197. Pio russian capacitor K42-11...is good ?
  198. My first build VTA ST-120
  199. World Wide Audio, model: HBP-97a, Hybrid Power Amplifier - info needed
  200. DIY 50C5 mini amp...
  201. So you think you have cool tubes?????
  202. Layout
  203. Looking to ID this amp
  204. Help me to make tube amply
  205. CAT SL1 SIGNATURE schematik phono
  206. Have anyone built this 6V6 amp?
  207. GU-50 in Single-Ended Triode Configuration - What bias points?
  208. DC coupling on a LTP? Opinions and help needed on Fred's design.
  209. Power Selection - Help Needed
  210. Which speaker with a 1/4W tube amp?
  211. 6973 VS 6CZ5 substitute
  212. Third Reich tubes
  213. Hello...and another ST-70 project.
  214. Home theater magic smoke...smoked and I think I heard a mirror crack...
  215. Scott LK48-B restoration
  216. 3 - 12AU7 Preamp. Is there such an animal?
  217. 300b filament
  218. resistor 880 ohms cathode
  219. Anyone have a Bugle Boy logo
  220. Change of circuit from triode to tetrode
  221. Need upgrade info for my Atma-Sphere Novacron Amps
  222. Whats Vintage Testing Equipment Do YOU Have/Use?
  223. JJ Kt77 Bias?
  224. tube rectified psu
  225. HELP!: my SET amp was turned off without a load and now it sound veiled!
  226. 5842 grid leak
  227. AMI Jukebox speaker impedence question
  228. Advice Needed: "Flabby" Amp Low-End
  229. Aikido transformer coupled output
  230. Audio measurements on tube amp. ? look here
  231. 12BH7A driver stage help
  232. Audio drive to g2 connected to g1 via 15K0
  233. KT88 SE Complete Kit
  234. Any high-end 6BM8 push pull tube amp schematic ?
  235. How a Triode Works
  236. EL3N substitute
  237. Magnavox AMP-185
  238. Best 6V6G that won't get me divorced..
  239. Shorted EL34 ?
  240. ARC VS60 hum in speaker
  241. Need help for a bias circuit
  242. Eico HF20 Output Txr Questions
  243. A Radford STA15 restoration story
  244. Tube Testing in DC Area
  245. Thorens PR24
  246. Newbie here with a couple questions
  247. 300B SwitchMode filament supply
  248. Mixed bias for balancing unmatched tubes in PPP?
  249. My First DIY Experience: An Aikido/Tetra Preamp
  250. how to test chokes for current and voltage

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