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  1. plate stoppers or cathode stoppers?
  2. Need Spud Amp schematic
  3. 5654 (6ak5) line stage in triode mode
  4. PSU capacitors
  5. Shuguang Treasure 300B-Z
  6. Rogers Cadet III input impedance
  7. Aikido w/ tone controls
  8. UTC Z-2961 input transformer
  9. Please help me improve my headphone amp
  10. Faint Hiss/Hum.
  11. What tubes with 3.3K p2p output?
  12. Strip board project completed.
  13. 6V6 SE VS ECL85
  14. 6v6 PP biasing question
  15. Phone Preamp PSU
  16. How much would a cathode follower drift ?
  17. Strange hum in a Williamson amp
  18. Tube preamp for a TDA2040 chipamp
  19. Heater problem
  20. A couple newbie questions
  21. 100KW Power Amplifier
  22. Excellent NOS Russian 6Pi3C/6N3C (6L6GC) Tubes...
  23. Flea-power class-A2 using a power opamp driver
  24. plate to plate feedback - measurements
  25. DC heat float with 50V bias tap from mains transformer?
  26. repair shop
  27. What to build next?
  28. Fisher X-100-C Output Transformer needed
  29. Schade Feedback
  30. RH807 push pull ?
  31. RIAA lite no.ls37
  32. help I need some addres tube store in amsterdam
  33. Valve curve tracer gm tester
  34. 50C5 pentode LTSpice model
  35. "Iron Garter" Push-Pull Amplifier
  36. Mcintosh Mc-3500 sound
  37. A couple of PSD questions
  38. parafeed - Gyrator vs CCS anode load
  39. Compactron amp... LIVES!
  40. Opinions Please
  41. Aikido REV D pcb
  42. New Edcor opt, what would a 150ohm primary be used for?
  43. GM-70, A2, biamping
  44. Espressivo Headphone Amplifier on Budget
  45. Coupling Caps for Aikido ACF Buffer
  46. How to compute current at control grid of power tube?
  47. High voltage SS output, any experiences ?
  48. Back on the forum after a long hiatus 6SN7 Preamp project in the works.
  49. Look for Single Tube scheme
  50. Cathode follower amplifier, push-pull, xformer-coupled
  51. help with "bruce heran" el84 amp S2
  52. Triodes and current flow
  53. Heaters Constant Current Regulator
  54. Driver Tubes: Help Me Decide
  55. Possible tweak
  56. DHT Driving Pentode Output Stage Question
  57. 50C5=50l6; 12av6=12at6
  58. Any experience to drive 805 tube?
  59. Fixed short in a 45
  60. power amp current
  61. Phase inverter/power section
  62. Concerned with current dual 5U4's...
  63. What tube is this?
  64. Signal tube noise!
  65. McIntosh Goodness From Scratch
  66. Marshall Amp strange wiring
  67. Fisher Output Transformer ID
  68. Stepped Attenuator for Air Tight ATC-1
  69. Caps .
  70. The Tube Killer Killer?
  71. Martel FAX-200C
  72. 6n6p headphone amp
  73. 2 caps vs 1 (adding low value teflon to pio)
  74. Ouput voltage of a triode stage on quiescent state should be zero?
  75. Hum Ho
  76. build a OTL (output-transformerless) amplifier
  77. 6v6 PP maggie with Polk SDA 1C
  78. Stromberg-Carlson AU-32 distortion in preamp
  79. Please Help - LF Peaks/Dips & Clipping
  80. Anybody watching this?
  81. Trying to find an unusual schematic posted here this Spring
  82. If you were going to build a OTL?
  83. Protecting a valve variable LM317 power supply
  84. EL34 PP PROJECT
  85. Matching tubes for PP
  86. Calculate triode strapped characteristics from pentode data?
  87. 6922 Loading Question
  88. corrections for LF and HF peaking
  89. 300bSE journey under way
  90. Why shielded tubes
  91. Aikido LV 6N27P SMPS completed
  92. Tube PS question: Acceptable ripple
  93. Back at the 45 SET
  94. Time to replace my 50 year old filter caps...
  95. Amazingly low distortion -- Radford-based design
  96. To ground or not to ground the OPT secondary, that is the question
  97. Ultralinear Observations and Questions
  98. FEEDBACK DELAY TIME
  99. 6SN7 v 6N8P v 6H8C
  100. NOS radio parts awaiting for my pick up!
  101. Toroidal Transformer Cover
  102. VTV 6sn7 line stage project
  103. can something be made using these tubes
  104. Help! Need tube tester info for 6CW4 Nuvistor
  105. Hampton MC preamp
  106. J-fet - tube DAC analog stage
  107. geloso 3270 power amplifier
  108. Belton micalex tube sockets any experience ?
  109. DeathTrap 500 - An Engineer's approach to the 300B SET
  110. My First Power Supply
  111. 5aR4 Rectifier Problem, Help! Little Long
  112. Electrolytic vs Polypropylene cathode
  113. Size of 5Y3 tubes?
  114. 3C24 really is a fine output tube...
  115. Yaqin MC100B Newbie Questions
  116. JE simple 45 SE grid leak resistor question
  117. 26 vs 27
  118. Bypass the tone control
  119. CCS with VN2222L
  120. Adding a ground with a 3 prong cable and connector
  121. European Made 6080/6AS7
  122. PFL200, what can I use them to?
  123. 7W7 tube - how it competes with other pentodes as driver?
  124. 1959 Blaupunkt receiver capacitors -Newbie
  125. i have one 5672 tube (new)
  126. 12ax7 pre amp + solid state power amp
  127. Preamp for Tim Mellow's 6C33C OTL
  128. Power supply buzz
  129. How to make a PCB with 15 years old Positiv 20
  130. Circuit query
  131. 845/211 driver circuits
  132. A question about the Malanz 7
  133. Looking for four KT90 Ei
  134. Dynaco PAS transformer breakdown
  135. where do you find your tube treasures
  136. 5670 Thoughts?
  137. looking to build or buy a cheep preamp
  138. Trying to achieve 25-30 watts... help please!
  139. RCA Reel to Reel Conversion??
  140. AA5 Tube Radio Design using 2010 Techniques
  141. I found a use for surplus tubes
  142. Edcor CXPP-30-MS-3.8K OPT
  143. Which tube does my amp use? 845 or 211
  144. Coupling cap replacement in series?
  145. electronique practique
  146. New PNP HV tranny for anode CCS
  147. tube reliability
  148. Hybrid dreams
  149. Triode Electronics 30W SE Transformer
  150. SMALL SIZE OUTPUT TRANSFORMERS
  151. headphone amp with 7025?
  152. Separation of preamp and power amp
  153. Aikido 9pin with 6n1p and 6n6p as Headphone
  154. PreAmp output transformers
  155. Line-out on tubes
  156. Would this scheme work ?
  157. differential cascode patented in 2007
  158. Question about AMP185 Rectifier Circuit
  159. correct heater wiring
  160. Speaker snap or crack (no pop)
  161. Very long cables
  162. Help! 2A3 SET quit after hot restart
  163. INTEGRATED HYBRID AMP WITH NO LOAD
  164. ECC88 symbol problem in TINA-TI
  165. 12AX7 preamp on 375V
  166. The Blue Velvet Line Preamp with 7193 instead of 6SN7
  167. Increase idle current on my KT77's?
  168. Yet another nutty idea - don't say I didn't warn
  169. Need help calibrating a Hickok 6000 Chicago
  170. need someone to run a sim in PSUD2...my PC is down and my MAC wont runt the program!!
  171. Building an B-15-inspired amp
  172. China preamp Xiang Sheng 768A
  173. RE: Fisher 200 tube amp fuse blowing issue
  174. How do you match output tubes?
  175. Best Dyna ST-70 rebuild kit?
  176. Help with tube wiring
  177. Decided on Gibson GA 20 need layout drawings etc.
  178. st70 problem
  179. Help with info on old valve amp
  180. Exceeding V-heater-cathode
  181. Cayin/Sparks A- 50T schematic.
  182. Looking for Bi siemens datasheet
  183. Transformers, transformers, transformers...
  184. Need ideas for my 6V6 from 1946 Blues / rockabilly
  185. Quasi complimentary output stage?
  186. 4ohm output transformer with 8ohm speaker
  187. First DIY project for a good power Amplifier
  188. Cherry red plates
  189. DIY triode
  190. First post/build
  191. New Transformer Vendor In Belgium
  192. KT88 grid stopper
  193. Connecting valve shields to earth
  194. Shindo MAZERIS BELLEVUS MODEL 454-2xAttenuator-How works this Circuit? 6067+12BH7
  195. Fixed bias failure B+ switch off protection
  196. Who can tell me where to buy Caddock MS220
  197. Uses for Quicksilver Transformers
  198. SE amp problem
  199. EL-34 to 6P3S-E
  200. 6922 sepp with Balanced Gains
  201. What path to choose for Hamonica amplifier?
  202. tubes for these OPT?, pri 1.75Kohm, sec 2.5, 4, 8ohm, taps 20%, weight 4Kg
  203. Turning a 6.3 V secondary into a 5 V secondary on an Antek 2T350
  204. gridchokes/output caps
  205. Can I build an MC30?
  206. Cathodyne: Can someone please help me fill in the blanks ?
  207. help hovland hp200
  208. 6SL7 and 6AS7 PP amplifier, design advice needed
  209. Project: Baldwin Tube Amp...
  210. Power Supply Input Capacitor - JE simple 45 question
  211. Tube output: Voltage or Current source?
  212. Edcor's new E-store website.....finally!
  213. Help complete the 300B schematic
  214. Confusion about a 5Y3GT rectifier
  215. Need advice on 300B circuit
  216. PCB in components
  217. new 6080 dc pp
  218. Single ended to balanced Aikido with mosfets in buffer position
  219. Simple LED power indicator light circuit?
  220. about 83 mercury rectifier
  221. Aikido Zo Calculation
  222. Line out issue - 1965 Ampeg B-18-N
  223. Pavane/ Psvane 845, 805, 211, 12AX7, 12AU7, 12AT7 and EL84
  224. Is this Telefunken fake or OEM?
  225. About Hmmmmm
  226. PRE-AMP PROJECT SRPP + HEADPHONE AMP
  227. 6BN11 vs 6CB6
  228. Is output stage local feedback necessary?
  229. Tube Longevity
  230. Power triode drive current requirements
  231. OPT Selection Question
  232. Recommend me a 6V6 P-P schematic
  233. Requesting advice on a pre-amp build. I'm working on asking realistic questions.
  234. So, im going to replace the Alps with a PEC...someone help?
  235. 13e1 se "shade" some questions
  236. Pio russian capacitor K42-11...is good ?
  237. My first build VTA ST-120
  238. World Wide Audio, model: HBP-97a, Hybrid Power Amplifier - info needed
  239. DIY 50C5 mini amp...
  240. So you think you have cool tubes?????
  241. Layout
  242. Looking to ID this amp
  243. Help me to make tube amply
  244. CAT SL1 SIGNATURE schematik phono
  245. Have anyone built this 6V6 amp?
  246. GU-50 in Single-Ended Triode Configuration - What bias points?
  247. DC coupling on a LTP? Opinions and help needed on Fred's design.
  248. Power Selection - Help Needed
  249. Which speaker with a 1/4W tube amp?
  250. 6973 VS 6CZ5 substitute

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