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  1. Triodes and current flow
  2. Heaters Constant Current Regulator
  3. Driver Tubes: Help Me Decide
  4. Possible tweak
  5. DHT Driving Pentode Output Stage Question
  6. 50C5=50l6; 12av6=12at6
  7. Any experience to drive 805 tube?
  8. Fixed short in a 45
  9. power amp current
  10. Phase inverter/power section
  11. Concerned with current dual 5U4's...
  12. What tube is this?
  13. Signal tube noise!
  14. McIntosh Goodness From Scratch
  15. Marshall Amp strange wiring
  16. Fisher Output Transformer ID
  17. Stepped Attenuator for Air Tight ATC-1
  18. Caps .
  19. The Tube Killer Killer?
  20. Martel FAX-200C
  21. 6n6p headphone amp
  22. 2 caps vs 1 (adding low value teflon to pio)
  23. Ouput voltage of a triode stage on quiescent state should be zero?
  24. Hum Ho
  25. build a OTL (output-transformerless) amplifier
  26. 6v6 PP maggie with Polk SDA 1C
  27. Stromberg-Carlson AU-32 distortion in preamp
  28. Please Help - LF Peaks/Dips & Clipping
  29. Anybody watching this?
  30. Trying to find an unusual schematic posted here this Spring
  31. If you were going to build a OTL?
  32. Protecting a valve variable LM317 power supply
  33. EL34 PP PROJECT
  34. Matching tubes for PP
  35. Calculate triode strapped characteristics from pentode data?
  36. 6922 Loading Question
  37. corrections for LF and HF peaking
  38. 300bSE journey under way
  39. Why shielded tubes
  40. Aikido LV 6N27P SMPS completed
  41. Tube PS question: Acceptable ripple
  42. Back at the 45 SET
  43. Time to replace my 50 year old filter caps...
  44. Amazingly low distortion -- Radford-based design
  45. To ground or not to ground the OPT secondary, that is the question
  46. Ultralinear Observations and Questions
  47. FEEDBACK DELAY TIME
  48. 6SN7 v 6N8P v 6H8C
  49. NOS radio parts awaiting for my pick up!
  50. Toroidal Transformer Cover
  51. VTV 6sn7 line stage project
  52. can something be made using these tubes
  53. Help! Need tube tester info for 6CW4 Nuvistor
  54. Hampton MC preamp
  55. J-fet - tube DAC analog stage
  56. geloso 3270 power amplifier
  57. Belton micalex tube sockets any experience ?
  58. DeathTrap 500 - An Engineer's approach to the 300B SET
  59. My First Power Supply
  60. 5aR4 Rectifier Problem, Help! Little Long
  61. Electrolytic vs Polypropylene cathode
  62. Size of 5Y3 tubes?
  63. 3C24 really is a fine output tube...
  64. Yaqin MC100B Newbie Questions
  65. JE simple 45 SE grid leak resistor question
  66. 26 vs 27
  67. Bypass the tone control
  68. CCS with VN2222L
  69. Adding a ground with a 3 prong cable and connector
  70. European Made 6080/6AS7
  71. PFL200, what can I use them to?
  72. 7W7 tube - how it competes with other pentodes as driver?
  73. 1959 Blaupunkt receiver capacitors -Newbie
  74. i have one 5672 tube (new)
  75. 12ax7 pre amp + solid state power amp
  76. Preamp for Tim Mellow's 6C33C OTL
  77. Power supply buzz
  78. How to make a PCB with 15 years old Positiv 20
  79. Circuit query
  80. 845/211 driver circuits
  81. A question about the Malanz 7
  82. Looking for four KT90 Ei
  83. Dynaco PAS transformer breakdown
  84. where do you find your tube treasures
  85. 5670 Thoughts?
  86. looking to build or buy a cheep preamp
  87. Trying to achieve 25-30 watts... help please!
  88. RCA Reel to Reel Conversion??
  89. AA5 Tube Radio Design using 2010 Techniques
  90. I found a use for surplus tubes
  91. Edcor CXPP-30-MS-3.8K OPT
  92. Which tube does my amp use? 845 or 211
  93. Coupling cap replacement in series?
  94. electronique practique
  95. New PNP HV tranny for anode CCS
  96. tube reliability
  97. Hybrid dreams
  98. Triode Electronics 30W SE Transformer
  99. SMALL SIZE OUTPUT TRANSFORMERS
  100. headphone amp with 7025?
  101. Separation of preamp and power amp
  102. Aikido 9pin with 6n1p and 6n6p as Headphone
  103. PreAmp output transformers
  104. Line-out on tubes
  105. Would this scheme work ?
  106. differential cascode patented in 2007
  107. Question about AMP185 Rectifier Circuit
  108. correct heater wiring
  109. Speaker snap or crack (no pop)
  110. Very long cables
  111. Help! 2A3 SET quit after hot restart
  112. INTEGRATED HYBRID AMP WITH NO LOAD
  113. ECC88 symbol problem in TINA-TI
  114. 12AX7 preamp on 375V
  115. The Blue Velvet Line Preamp with 7193 instead of 6SN7
  116. Increase idle current on my KT77's?
  117. Yet another nutty idea - don't say I didn't warn
  118. Need help calibrating a Hickok 6000 Chicago
  119. need someone to run a sim in PSUD2...my PC is down and my MAC wont runt the program!!
  120. Building an B-15-inspired amp
  121. China preamp Xiang Sheng 768A
  122. RE: Fisher 200 tube amp fuse blowing issue
  123. How do you match output tubes?
  124. Best Dyna ST-70 rebuild kit?
  125. Help with tube wiring
  126. Decided on Gibson GA 20 need layout drawings etc.
  127. st70 problem
  128. Help with info on old valve amp
  129. Exceeding V-heater-cathode
  130. Cayin/Sparks A- 50T schematic.
  131. Looking for Bi siemens datasheet
  132. Transformers, transformers, transformers...
  133. Need ideas for my 6V6 from 1946 Blues / rockabilly
  134. Quasi complimentary output stage?
  135. 4ohm output transformer with 8ohm speaker
  136. First DIY project for a good power Amplifier
  137. Cherry red plates
  138. DIY triode
  139. First post/build
  140. New Transformer Vendor In Belgium
  141. KT88 grid stopper
  142. Connecting valve shields to earth
  143. Shindo MAZERIS BELLEVUS MODEL 454-2xAttenuator-How works this Circuit? 6067+12BH7
  144. Fixed bias failure B+ switch off protection
  145. Who can tell me where to buy Caddock MS220
  146. Uses for Quicksilver Transformers
  147. SE amp problem
  148. EL-34 to 6P3S-E
  149. 6922 sepp with Balanced Gains
  150. What path to choose for Hamonica amplifier?
  151. tubes for these OPT?, pri 1.75Kohm, sec 2.5, 4, 8ohm, taps 20%, weight 4Kg
  152. Turning a 6.3 V secondary into a 5 V secondary on an Antek 2T350
  153. gridchokes/output caps
  154. Can I build an MC30?
  155. Cathodyne: Can someone please help me fill in the blanks ?
  156. help hovland hp200
  157. 6SL7 and 6AS7 PP amplifier, design advice needed
  158. Project: Baldwin Tube Amp...
  159. Power Supply Input Capacitor - JE simple 45 question
  160. Tube output: Voltage or Current source?
  161. Edcor's new E-store website.....finally!
  162. Help complete the 300B schematic
  163. Confusion about a 5Y3GT rectifier
  164. Need advice on 300B circuit
  165. PCB in components
  166. new 6080 dc pp
  167. Single ended to balanced Aikido with mosfets in buffer position
  168. Simple LED power indicator light circuit?
  169. about 83 mercury rectifier
  170. Aikido Zo Calculation
  171. Line out issue - 1965 Ampeg B-18-N
  172. Pavane/ Psvane 845, 805, 211, 12AX7, 12AU7, 12AT7 and EL84
  173. Is this Telefunken fake or OEM?
  174. About Hmmmmm
  175. PRE-AMP PROJECT SRPP + HEADPHONE AMP
  176. 6BN11 vs 6CB6
  177. Is output stage local feedback necessary?
  178. Tube Longevity
  179. Power triode drive current requirements
  180. OPT Selection Question
  181. Recommend me a 6V6 P-P schematic
  182. Requesting advice on a pre-amp build. I'm working on asking realistic questions.
  183. So, im going to replace the Alps with a PEC...someone help?
  184. 13e1 se "shade" some questions
  185. Pio russian capacitor K42-11...is good ?
  186. My first build VTA ST-120
  187. World Wide Audio, model: HBP-97a, Hybrid Power Amplifier - info needed
  188. DIY 50C5 mini amp...
  189. So you think you have cool tubes?????
  190. Layout
  191. Looking to ID this amp
  192. Help me to make tube amply
  193. CAT SL1 SIGNATURE schematik phono
  194. Have anyone built this 6V6 amp?
  195. GU-50 in Single-Ended Triode Configuration - What bias points?
  196. DC coupling on a LTP? Opinions and help needed on Fred's design.
  197. Power Selection - Help Needed
  198. Which speaker with a 1/4W tube amp?
  199. 6973 VS 6CZ5 substitute
  200. Third Reich tubes
  201. Hello...and another ST-70 project.
  202. Home theater magic smoke...smoked and I think I heard a mirror crack...
  203. Scott LK48-B restoration
  204. 3 - 12AU7 Preamp. Is there such an animal?
  205. 300b filament
  206. resistor 880 ohms cathode
  207. Anyone have a Bugle Boy logo
  208. Change of circuit from triode to tetrode
  209. Need upgrade info for my Atma-Sphere Novacron Amps
  210. Whats Vintage Testing Equipment Do YOU Have/Use?
  211. JJ Kt77 Bias?
  212. tube rectified psu
  213. HELP!: my SET amp was turned off without a load and now it sound veiled!
  214. 5842 grid leak
  215. AMI Jukebox speaker impedence question
  216. Advice Needed: "Flabby" Amp Low-End
  217. Aikido transformer coupled output
  218. Audio measurements on tube amp. ? look here
  219. 12BH7A driver stage help
  220. Audio drive to g2 connected to g1 via 15K0
  221. KT88 SE Complete Kit
  222. Any high-end 6BM8 push pull tube amp schematic ?
  223. How a Triode Works
  224. EL3N substitute
  225. Magnavox AMP-185
  226. Best 6V6G that won't get me divorced..
  227. Shorted EL34 ?
  228. ARC VS60 hum in speaker
  229. Need help for a bias circuit
  230. Eico HF20 Output Txr Questions
  231. A Radford STA15 restoration story
  232. Tube Testing in DC Area
  233. Thorens PR24
  234. Newbie here with a couple questions
  235. 300B SwitchMode filament supply
  236. Mixed bias for balancing unmatched tubes in PPP?
  237. My First DIY Experience: An Aikido/Tetra Preamp
  238. how to test chokes for current and voltage
  239. pictures miniblok 1 and miniblok 2 by fred nachbaur
  240. Help with Aikido Preamp+class d amp
  241. will a PTX without center tap work?
  242. Anyone have information on 300B silvertone tube
  243. 6P14P push pull with low output
  244. passive 30Hz-20kHz Bandpass filter for tube preamp?
  245. My First Amp
  246. Frank's 6sn7 preamp
  247. My new 300B Amp
  248. help troubleshooting gradually distorting tube amp (dropping b+ voltage when hot)
  249. Tube Gear Supply/Surplus in Houston Area
  250. What 2a3 ?

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