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  1. Schade Feedback
  2. RH807 push pull ?
  3. RIAA lite no.ls37
  4. help I need some addres tube store in amsterdam
  5. Valve curve tracer gm tester
  6. 50C5 pentode LTSpice model
  7. "Iron Garter" Push-Pull Amplifier
  8. Mcintosh Mc-3500 sound
  9. A couple of PSD questions
  10. parafeed - Gyrator vs CCS anode load
  11. Compactron amp... LIVES!
  12. Opinions Please
  13. Aikido REV D pcb
  14. New Edcor opt, what would a 150ohm primary be used for?
  15. GM-70, A2, biamping
  16. Espressivo Headphone Amplifier on Budget
  17. Coupling Caps for Aikido ACF Buffer
  18. How to compute current at control grid of power tube?
  19. High voltage SS output, any experiences ?
  20. Back on the forum after a long hiatus 6SN7 Preamp project in the works.
  21. Look for Single Tube scheme
  22. Cathode follower amplifier, push-pull, xformer-coupled
  23. help with "bruce heran" el84 amp S2
  24. Triodes and current flow
  25. Heaters Constant Current Regulator
  26. Driver Tubes: Help Me Decide
  27. Possible tweak
  28. DHT Driving Pentode Output Stage Question
  29. 50C5=50l6; 12av6=12at6
  30. Any experience to drive 805 tube?
  31. Fixed short in a 45
  32. power amp current
  33. Phase inverter/power section
  34. Concerned with current dual 5U4's...
  35. What tube is this?
  36. Signal tube noise!
  37. McIntosh Goodness From Scratch
  38. Marshall Amp strange wiring
  39. Fisher Output Transformer ID
  40. Stepped Attenuator for Air Tight ATC-1
  41. Caps .
  42. The Tube Killer Killer?
  43. Martel FAX-200C
  44. 6n6p headphone amp
  45. 2 caps vs 1 (adding low value teflon to pio)
  46. Ouput voltage of a triode stage on quiescent state should be zero?
  47. Hum Ho
  48. build a OTL (output-transformerless) amplifier
  49. 6v6 PP maggie with Polk SDA 1C
  50. Stromberg-Carlson AU-32 distortion in preamp
  51. Please Help - LF Peaks/Dips & Clipping
  52. Anybody watching this?
  53. Trying to find an unusual schematic posted here this Spring
  54. If you were going to build a OTL?
  55. Protecting a valve variable LM317 power supply
  56. EL34 PP PROJECT
  57. Matching tubes for PP
  58. Calculate triode strapped characteristics from pentode data?
  59. 6922 Loading Question
  60. corrections for LF and HF peaking
  61. 300bSE journey under way
  62. Why shielded tubes
  63. Aikido LV 6N27P SMPS completed
  64. Tube PS question: Acceptable ripple
  65. Back at the 45 SET
  66. Time to replace my 50 year old filter caps...
  67. Amazingly low distortion -- Radford-based design
  68. To ground or not to ground the OPT secondary, that is the question
  69. Ultralinear Observations and Questions
  70. FEEDBACK DELAY TIME
  71. 6SN7 v 6N8P v 6H8C
  72. NOS radio parts awaiting for my pick up!
  73. Toroidal Transformer Cover
  74. VTV 6sn7 line stage project
  75. can something be made using these tubes
  76. Help! Need tube tester info for 6CW4 Nuvistor
  77. Hampton MC preamp
  78. J-fet - tube DAC analog stage
  79. geloso 3270 power amplifier
  80. Belton micalex tube sockets any experience ?
  81. DeathTrap 500™ - An Engineer's approach to the 300B SET
  82. My First Power Supply
  83. 5aR4 Rectifier Problem, Help! Little Long
  84. Electrolytic vs Polypropylene cathode
  85. Size of 5Y3 tubes?
  86. 3C24 really is a fine output tube...
  87. Yaqin MC100B Newbie Questions
  88. JE simple 45 SE grid leak resistor question
  89. 26 vs 27
  90. Bypass the tone control
  91. CCS with VN2222L
  92. Adding a ground with a 3 prong cable and connector
  93. European Made 6080/6AS7
  94. PFL200, what can I use them to?
  95. 7W7 tube - how it competes with other pentodes as driver?
  96. 1959 Blaupunkt receiver capacitors -Newbie
  97. i have one 5672 tube (new)
  98. 12ax7 pre amp + solid state power amp
  99. Preamp for Tim Mellow's 6C33C OTL
  100. Power supply buzz
  101. How to make a PCB with 15 years old Positiv 20
  102. Circuit query
  103. 845/211 driver circuits
  104. A question about the Malanz 7
  105. Looking for four KT90 Ei
  106. Dynaco PAS transformer breakdown
  107. where do you find your tube treasures
  108. 5670 Thoughts?
  109. looking to build or buy a cheep preamp
  110. Trying to achieve 25-30 watts... help please!
  111. RCA Reel to Reel Conversion??
  112. AA5 Tube Radio Design using 2010 Techniques
  113. I found a use for surplus tubes
  114. Edcor CXPP-30-MS-3.8K OPT
  115. Which tube does my amp use? 845 or 211
  116. Coupling cap replacement in series?
  117. electronique practique
  118. New PNP HV tranny for anode CCS
  119. tube reliability
  120. Hybrid dreams
  121. Triode Electronics 30W SE Transformer
  122. SMALL SIZE OUTPUT TRANSFORMERS
  123. headphone amp with 7025?
  124. Separation of preamp and power amp
  125. Aikido 9pin with 6n1p and 6n6p as Headphone
  126. PreAmp output transformers
  127. Line-out on tubes
  128. Would this scheme work ?
  129. differential cascode patented in 2007
  130. Question about AMP185 Rectifier Circuit
  131. correct heater wiring
  132. Speaker snap or crack (no pop)
  133. Very long cables
  134. Help! 2A3 SET quit after hot restart
  135. INTEGRATED HYBRID AMP WITH NO LOAD
  136. ECC88 symbol problem in TINA-TI
  137. 12AX7 preamp on 375V
  138. The Blue Velvet Line Preamp with 7193 instead of 6SN7
  139. Increase idle current on my KT77's?
  140. Yet another nutty idea - don't say I didn't warn
  141. Need help calibrating a Hickok 6000 Chicago
  142. need someone to run a sim in PSUD2...my PC is down and my MAC wont runt the program!!
  143. Building an B-15-inspired amp
  144. China preamp Xiang Sheng 768A
  145. RE: Fisher 200 tube amp fuse blowing issue
  146. How do you match output tubes?
  147. Best Dyna ST-70 rebuild kit?
  148. Help with tube wiring
  149. Decided on Gibson GA 20 need layout drawings etc.
  150. st70 problem
  151. Help with info on old valve amp
  152. Exceeding V-heater-cathode
  153. Cayin/Sparks A- 50T schematic.
  154. Looking for Bi siemens datasheet
  155. Transformers, transformers, transformers...
  156. Need ideas for my 6V6 from 1946 Blues / rockabilly
  157. Quasi complimentary output stage?
  158. 4ohm output transformer with 8ohm speaker
  159. First DIY project for a good power Amplifier
  160. Cherry red plates
  161. DIY triode
  162. First post/build
  163. New Transformer Vendor In Belgium
  164. KT88 grid stopper
  165. Connecting valve shields to earth
  166. Shindo MAZERIS BELLEVUS MODEL 454-2xAttenuator-How works this Circuit? 6067+12BH7
  167. Fixed bias failure B+ switch off protection
  168. Who can tell me where to buy Caddock MS220
  169. Uses for Quicksilver Transformers
  170. SE amp problem
  171. EL-34 to 6P3S-E
  172. 6922 sepp with Balanced Gains
  173. What path to choose for Hamonica amplifier?
  174. tubes for these OPT?, pri 1.75Kohm, sec 2.5, 4, 8ohm, taps 20%, weight 4Kg
  175. Turning a 6.3 V secondary into a 5 V secondary on an Antek 2T350
  176. gridchokes/output caps
  177. Can I build an MC30?
  178. Cathodyne: Can someone please help me fill in the blanks ?
  179. help hovland hp200
  180. 6SL7 and 6AS7 PP amplifier, design advice needed
  181. Project: Baldwin Tube Amp...
  182. Power Supply Input Capacitor - JE simple 45 question
  183. Tube output: Voltage or Current source?
  184. Edcor's new E-store website.....finally!
  185. Help complete the 300B schematic
  186. Confusion about a 5Y3GT rectifier
  187. Need advice on 300B circuit
  188. PCB in components
  189. new 6080 dc pp
  190. Single ended to balanced Aikido with mosfets in buffer position
  191. Simple LED power indicator light circuit?
  192. about 83 mercury rectifier
  193. Aikido Zo Calculation
  194. Line out issue - 1965 Ampeg B-18-N
  195. Pavane/ Psvane 845, 805, 211, 12AX7, 12AU7, 12AT7 and EL84
  196. Is this Telefunken fake or OEM?
  197. About Hmmmmm
  198. PRE-AMP PROJECT SRPP + HEADPHONE AMP
  199. 6BN11 vs 6CB6
  200. Is output stage local feedback necessary?
  201. Tube Longevity
  202. Power triode drive current requirements
  203. OPT Selection Question
  204. Recommend me a 6V6 P-P schematic
  205. Requesting advice on a pre-amp build. I'm working on asking realistic questions.
  206. So, im going to replace the Alps with a PEC...someone help?
  207. 13e1 se "shade" some questions
  208. Pio russian capacitor K42-11...is good ?
  209. My first build VTA ST-120
  210. World Wide Audio, model: HBP-97a, Hybrid Power Amplifier - info needed
  211. DIY 50C5 mini amp...
  212. So you think you have cool tubes?????
  213. Layout
  214. Looking to ID this amp
  215. Help me to make tube amply
  216. CAT SL1 SIGNATURE schematik phono
  217. Have anyone built this 6V6 amp?
  218. GU-50 in Single-Ended Triode Configuration - What bias points?
  219. DC coupling on a LTP? Opinions and help needed on Fred's design.
  220. Power Selection - Help Needed
  221. Which speaker with a 1/4W tube amp?
  222. 6973 VS 6CZ5 substitute
  223. Third Reich tubes
  224. Hello...and another ST-70 project.
  225. Home theater magic smoke...smoked and I think I heard a mirror crack...
  226. Scott LK48-B restoration
  227. 3 - 12AU7 Preamp. Is there such an animal?
  228. 300b filament
  229. resistor 880 ohms cathode
  230. Anyone have a Bugle Boy logo
  231. Change of circuit from triode to tetrode
  232. Need upgrade info for my Atma-Sphere Novacron Amps
  233. Whats Vintage Testing Equipment Do YOU Have/Use?
  234. JJ Kt77 Bias?
  235. tube rectified psu
  236. HELP!: my SET amp was turned off without a load and now it sound veiled!
  237. 5842 grid leak
  238. AMI Jukebox speaker impedence question
  239. Advice Needed: "Flabby" Amp Low-End
  240. Aikido transformer coupled output
  241. Audio measurements on tube amp. ? look here
  242. 12BH7A driver stage help
  243. Audio drive to g2 connected to g1 via 15K0
  244. KT88 SE Complete Kit
  245. Any high-end 6BM8 push pull tube amp schematic ?
  246. How a Triode Works
  247. EL3N substitute
  248. Magnavox AMP-185
  249. Best 6V6G that won't get me divorced..
  250. Shorted EL34 ?