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  1. Oscillation WE417A
  2. EL84 fixed fixed bias
  3. Blown stereo
  4. 807/6au6 pure pentode mode amplifier
  5. help with ID'ing a tube
  6. Magnavox 50EH5 Stereo Amp
  7. My new Circlotron OTL tube power Amp.
  8. ideas for a tube eating guitair amp
  9. 6DE4, unused pins
  10. 300B what output transformer Sowter or Lundahl?
  11. 6DJ8 preamp w/balanced input - strange schematic
  12. Screen Grid Regulation Requirements
  13. Advice needed on new 6L6 ro 6V6 SE or SET build
  14. need a little help with an HK solo2 tube receiver
  15. Help me to build Vacuum Tube Amp.
  16. amp with SRPP output stage? post if you know one
  17. Output transformer question
  18. EF86 Phono pre-amp or Mcintosh MC2200?
  19. Transcendar is Branching Out
  20. can SE driven PP be clean enough to sound SE ?
  21. k12-m amp not working
  22. 813 amp and old choke
  23. Several hundred tubes found! What to do!
  24. Possible to convert Audiorom Fu29 to Single end?
  25. Measuring bias
  26. ecc802s SRPP preamplifier
  27. HELP! Capacitor specs for Sonic Frontiers SFC-1 Control Amplifier
  28. Class A KT88 info
  29. What is screen tap of transformer?
  30. Brightest heaters in tubes?
  31. 40% tap or not
  32. 6dj8 phono schematic needed
  33. EL34 Parts..
  34. solid state driven p-p ultralinear
  35. linestage w/separate PSU: where to "split" ?
  36. Anybody know this TELEFUNKEN SE transformer?
  37. Too much feedback?
  38. Tube Power Supply Dummy Load
  39. For 6c33 Fans. A new schematic
  40. WAD phono 3 motorboating with Raphaelite 300b
  41. Vintage Stromberg Carlson
  42. GM70 and Other LTSpice Tube Models
  43. Please help me understand this feedback
  44. Affordable Valve Company - Re-bias
  45. The effect of different value coupling capacitors?
  46. Closed loop stability help needed.
  47. EAR 509 OPT Impedances
  48. Installing Hammond 1609s in K12-G
  49. 6088 Amplifier
  50. Valve Art kt88 not the same ring getter?
  51. 5mA DC transformer - tube output stage?
  52. Mini amp questions
  53. What mean those russian electronic units ?
  54. Coupling capacitors
  55. Monsters thread (high power tube amps)
  56. CCS on LTP please help
  57. Best type of pre-amp for valve/tube power amp
  58. 12au7 made by Toshiba, Hitachi, Matsushita, RSD, International and Miniwatt?
  59. Load lines
  60. Cold cathode tubes
  61. Redundant CNC stainless steel enclosures
  62. First try P-P 6S41S design
  63. Help!!! I need to get valve TAW12/20B / TRIODE for use as HF amplifier and oscillator
  64. Velleman K4040 Stereo Vacuum Tube Amplifier Volume Control
  65. 12AT7 Regulated Power Supply
  66. 2A3 to 45 Cathode Wattage?
  67. Cheap Chinese Ebay Amps
  68. Audion Sterling Integrated Amp Version - Stereo MK-I - Extended Live Time wanted
  69. Transformer Center Taps
  70. PTX temps
  71. Can A valve amplifier be both Class A and Class B?
  72. got a problem with my scope, need some advice
  73. DC coupled cathode follower driving me nuts
  74. Vacuum state gone?
  75. 1634 dual triode
  76. Aikido line amp
  77. Winding an ISO TX with pair of inductors
  78. Quad II Switch Mode PSU
  79. What do do with all of these?
  80. global negative feedback in el84 push pull
  81. Old HP transformer - what is it?
  82. FET Phase inverter to drive valve PA
  83. Core Audio 6BC4 buffer problem
  84. Power Amplifiers & Gain
  85. Power tube maximum current draw from a power supply
  86. Tube Matching in a Power Amp?
  87. SE stereo / PP mono block schematic choices
  88. How to measure output transformer?
  89. Shoddy Packaging
  90. Schematic needed for Manley SnapperŪ from Manley Labs
  91. Resistor, capacitor across output transformer AKAI M-7
  92. eBay&etc cheap tube buffers/preamp .. anything good?
  93. 6N3 Preamp Question
  94. OK guys...be gentle
  95. 6SN7 and DN2540's
  96. 10k and 6k primary windings on OPT. Use for UL?
  97. Settings for PL509, EZ80 tubes on 539c tester
  98. replacing 6LGC with 6550 or KT88
  99. ECC83 input circuitry
  100. Dynaco MK III modifications
  101. SMPS for heaters
  102. Headphone tube-amp with oddball OPT
  103. Neon Lamp Question
  104. Curious old tubes from tandy
  105. 828 Triode Curves?
  106. 813 review
  107. tube circlotron for headphone amplifier
  108. valve headphone pre-amp
  109. Shengyi 6AQ5
  110. Burn in small signal tubes?
  111. 24V powered 6N11 amplifier, 0.25% distortion, pretty good!
  112. SS diode replacements
  113. can you check if everything is ok with el84 schematic please
  114. Advice on this amp schematic please
  115. 8156's
  116. Can't get anything from my new pre-amp
  117. Bottlehead Paramount Question
  118. need help with ac/dc am/fm radio
  119. Peculiar oscillation
  120. ECC83 settings for Taylor 45C
  121. New Jolida 302b amp owner questions
  122. Help with gyrator
  123. Some basic questions...
  124. I have a hard one for you guys
  125. CCS pulsing oscillation problem
  126. tube testers: different gM standards for same tube?
  127. Frank's Pre Still In Vogue?
  128. Home made tube amps
  129. Source for SED "winged C" tubes?
  130. Preamp Help
  131. Push Pull Class A
  132. Multi-Ways Output Transformers
  133. Redplating anomaly?
  134. Just for fun power poll!
  135. Biasing a Jadis Orchestra
  136. Yaqin MC-50L
  137. CJ PV5 Upgrades?
  138. New Member - Magnavox Amps
  139. Double parafeed
  140. 6550 grid characteristic help please
  141. Newbie- Tube Testing RF Amp tube
  142. Urgent:Wrongly order 220V Power supply for 230V enviroment
  143. Mono sub-out from one trafo?
  144. Mu Follower to drive a Push-Pull Amplifier?
  145. The 6934A Triode Tube
  146. Constant current sink for 6SN7
  147. 6V6 high voltage
  148. VTL deluxe 100 monoblk (KT88) need help?
  149. Va,Ia exeed limiting values in datasheeds ?
  150. Old DIYtube ST-35 electrolytics - swap?
  151. What Hammond for UK?
  152. What would you build with this transformer set?
  153. EL86 / 6CW5 + 6BQ7A amp design
  154. Western Electric theater amplifiers; how to hook them up?
  155. 12AU7,12B4A PSE schematic needs finishing!
  156. Dual grid and plate pins
  157. Best sounding ECC83 ?
  158. tube output for Playstation 1
  159. 6GX8 as Audio Level Indicator?
  160. help on 12AU7 Preamp circuit
  161. Anyone bought tubes from http://www.nostubestore.com/ ?
  162. Tube pre-amp with exposed tubes?
  163. Using low voltage lamp in power supply
  164. GU 50 monoblock
  165. KT-88 Push Pull with CFB
  166. 12AX7 + ?? Ideas 2A3 // 6L6
  167. Formula for driver current requirement ?
  168. Need a little help with a regulator circuit if you are willing.
  169. Troubleshooting help for 12AQ5 amp
  170. Can anyone help with an ef86 tape preamp mod please?
  171. Herald Amp
  172. To switch B+ or not?
  173. All-tube vs tube/mosfet hybrid ?
  174. 6c33c-b question
  175. 12AT7 substitutes?
  176. 1st project salvaged sears receiver iron need good amp schematic
  177. FM-3 ? About parts replacement in IF stages
  178. simple EL84 parallel?
  179. Finished: Claus Byrtih EL34 amplifier on Isophon BS35 speaker set
  180. Bogen CHB100 Valve Question
  181. 1st build; Adding load to PT secondary
  182. need help RCA RS 199C
  183. Unusually high Gm
  184. RH84 motorboating, stereo vs mono
  185. Use a tube rectifier for grid bias voltage, AA5 Radio tubes and usage.
  186. Cathode bypass with Long tail pair
  187. new chinese tube manufacturer
  188. Black Gate WKZ - can they be used in these circuits?
  189. Yet another question about HV Maida Regs
  190. Question about vacuum tubes
  191. Scott 299D Calibration
  192. Score! Bag-O-tubes!
  193. Building a tube integrated amp
  194. Audio Note Kits L1 Build...
  195. Need help with old mic amp
  196. Temporary hum
  197. Unidentified Tube - One for the detectives!
  198. Rogues?
  199. What about big tube RV278 Telefunken?
  200. variac variable transformer
  201. Tube amp OPT for Headphone Amp? (impedance matching question)
  202. current needed for 4x50l6 & 3x6sn6
  203. 6N11 tube work at 24V power supply?
  204. Heater voltage 5volt!
  205. help me choose a high end opt for tubelabs SE!
  206. 6L6/807 AB2 triode-- screen drive?
  207. help troubleshooting
  208. Anode Follower Article
  209. ECC802S 12AU7 ECC82 heater question
  210. Books for amplifiers
  211. E180F Preamp
  212. Don Allen Amp's ????
  213. To connect or not to connect..........
  214. Phonostage with tube moving coil
  215. 300b tube Temperature?
  216. Center tap transformer for elevated heater supplies
  217. single ended kt88 fuse blowing after an hour
  218. Radiotron question
  219. suggested use for old telefunken tubes
  220. Using different ouputs for two different drivers
  221. Pete Millett Uniamp with 300b
  222. Cary slp-70
  223. How to combine 2 signals from 2 gain stages
  224. Increase B+ supply
  225. Aikido Tetra Sans Phono PCB
  226. Loadlines and distortion (6S33S/6S41S)
  227. home theatre bypass feature
  228. Doubling the power of hifi tube amplifiers
  229. Can this tube be used in audio amplifier?
  230. 100 V OPT
  231. Help me understand tube chart data
  232. Listening preference....
  233. tube socket legs?
  234. Stand alone gain stage pre-amp
  235. I kinda sorta burned up my K12-G power transformer
  236. RCA-182 Tube Amp
  237. Transformer potting material? what material?
  238. Ultimate 6xEL34 PPP monoblocks? Hopefully with your help :)
  239. tube amp/pre in car?
  240. Thorsten's tube Stage for TDA1541A
  241. Convert Gates pre-amp to DC filament?
  242. any suggestions for a mid-amp transformer for a hybrid design... like this circuit...
  243. how much C is too much C?
  244. fisher 70AZ
  245. RE: My first attempt at using Tube Cadd
  246. Srpp simple explanation
  247. Driver for a 807 em triode mode...help !!!
  248. 6J6-based SSMH?
  249. Small tube amp based on 6N6P
  250. replacement for Ei 12BH7AEG

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