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  1. More probably stupid questions about feedback
  2. single stage amp?
  3. SS 83 again
  4. Making Spice Models for tubes
  5. Seth mk 2 ???
  6. Colorful inspiration
  7. Testing KT-90's Ei NIs Yugoslavia
  8. El Cheapo Transformer Question
  9. Why does the grid extend so far beyond the anode ?
  10. Valve amplifier identification
  11. E-M-field problem
  12. Effective cathode resistance
  13. Spectrum evaluation ECC82
  14. power d90-b
  15. el34, kt88, kt90, 6550 to 8417 conversion
  16. Do you know these capacitors?
  17. GRAAF GAAFiti WFB ONE - Schematic needed
  18. Oscillation WE417A
  19. EL84 fixed fixed bias
  20. Blown stereo
  21. 807/6au6 pure pentode mode amplifier
  22. help with ID'ing a tube
  23. Magnavox 50EH5 Stereo Amp
  24. My new Circlotron OTL tube power Amp.
  25. ideas for a tube eating guitair amp
  26. 6DE4, unused pins
  27. 300B what output transformer Sowter or Lundahl?
  28. 6DJ8 preamp w/balanced input - strange schematic
  29. Screen Grid Regulation Requirements
  30. Advice needed on new 6L6 ro 6V6 SE or SET build
  31. need a little help with an HK solo2 tube receiver
  32. Help me to build Vacuum Tube Amp.
  33. amp with SRPP output stage? post if you know one
  34. Output transformer question
  35. EF86 Phono pre-amp or Mcintosh MC2200?
  36. Transcendar is Branching Out
  37. can SE driven PP be clean enough to sound SE ?
  38. k12-m amp not working
  39. 813 amp and old choke
  40. Several hundred tubes found! What to do!
  41. Possible to convert Audiorom Fu29 to Single end?
  42. Measuring bias
  43. ecc802s SRPP preamplifier
  44. HELP! Capacitor specs for Sonic Frontiers SFC-1 Control Amplifier
  45. Class A KT88 info
  46. What is screen tap of transformer?
  47. Brightest heaters in tubes?
  48. 40% tap or not
  49. 6dj8 phono schematic needed
  50. EL34 Parts..
  51. solid state driven p-p ultralinear
  52. linestage w/separate PSU: where to "split" ?
  53. Anybody know this TELEFUNKEN SE transformer?
  54. Too much feedback?
  55. Tube Power Supply Dummy Load
  56. For 6c33 Fans. A new schematic
  57. WAD phono 3 motorboating with Raphaelite 300b
  58. Vintage Stromberg Carlson
  59. GM70 and Other LTSpice Tube Models
  60. Please help me understand this feedback
  61. Affordable Valve Company - Re-bias
  62. The effect of different value coupling capacitors?
  63. Closed loop stability help needed.
  64. EAR 509 OPT Impedances
  65. Installing Hammond 1609s in K12-G
  66. 6088 Amplifier
  67. Valve Art kt88 not the same ring getter?
  68. 5mA DC transformer - tube output stage?
  69. Mini amp questions
  70. What mean those russian electronic units ?
  71. Coupling capacitors
  72. Monsters thread (high power tube amps)
  73. CCS on LTP please help
  74. Best type of pre-amp for valve/tube power amp
  75. 12au7 made by Toshiba, Hitachi, Matsushita, RSD, International and Miniwatt?
  76. Load lines
  77. Cold cathode tubes
  78. Redundant CNC stainless steel enclosures
  79. First try P-P 6S41S design
  80. Help!!! I need to get valve TAW12/20B / TRIODE for use as HF amplifier and oscillator
  81. Velleman K4040 Stereo Vacuum Tube Amplifier Volume Control
  82. 12AT7 Regulated Power Supply
  83. 2A3 to 45 Cathode Wattage?
  84. Cheap Chinese Ebay Amps
  85. Audion Sterling Integrated Amp Version - Stereo MK-I - Extended Live Time wanted
  86. Transformer Center Taps
  87. PTX temps
  88. Can A valve amplifier be both Class A and Class B?
  89. got a problem with my scope, need some advice
  90. DC coupled cathode follower driving me nuts
  91. Vacuum state gone?
  92. 1634 dual triode
  93. Aikido line amp
  94. Winding an ISO TX with pair of inductors
  95. Quad II Switch Mode PSU
  96. What do do with all of these?
  97. global negative feedback in el84 push pull
  98. Old HP transformer - what is it?
  99. FET Phase inverter to drive valve PA
  100. Core Audio 6BC4 buffer problem
  101. Power Amplifiers & Gain
  102. Power tube maximum current draw from a power supply
  103. Tube Matching in a Power Amp?
  104. SE stereo / PP mono block schematic choices
  105. How to measure output transformer?
  106. Shoddy Packaging
  107. Schematic needed for Manley SnapperŪ from Manley Labs
  108. Resistor, capacitor across output transformer AKAI M-7
  109. eBay&etc cheap tube buffers/preamp .. anything good?
  110. 6N3 Preamp Question
  111. OK guys...be gentle
  112. 6SN7 and DN2540's
  113. 10k and 6k primary windings on OPT. Use for UL?
  114. Settings for PL509, EZ80 tubes on 539c tester
  115. replacing 6LGC with 6550 or KT88
  116. ECC83 input circuitry
  117. Dynaco MK III modifications
  118. SMPS for heaters
  119. Headphone tube-amp with oddball OPT
  120. Neon Lamp Question
  121. Curious old tubes from tandy
  122. 828 Triode Curves?
  123. 813 review
  124. tube circlotron for headphone amplifier
  125. valve headphone pre-amp
  126. Shengyi 6AQ5
  127. Burn in small signal tubes?
  128. 24V powered 6N11 amplifier, 0.25% distortion, pretty good!
  129. SS diode replacements
  130. can you check if everything is ok with el84 schematic please
  131. Advice on this amp schematic please
  132. 8156's
  133. Can't get anything from my new pre-amp
  134. Bottlehead Paramount Question
  135. need help with ac/dc am/fm radio
  136. Peculiar oscillation
  137. ECC83 settings for Taylor 45C
  138. New Jolida 302b amp owner questions
  139. Help with gyrator
  140. Some basic questions...
  141. I have a hard one for you guys
  142. CCS pulsing oscillation problem
  143. tube testers: different gM standards for same tube?
  144. Frank's Pre Still In Vogue?
  145. Home made tube amps
  146. Source for SED "winged C" tubes?
  147. Preamp Help
  148. Push Pull Class A
  149. Multi-Ways Output Transformers
  150. Redplating anomaly?
  151. Just for fun power poll!
  152. BIASING A JADIS ORCHESTRA
  153. Yaqin MC-50L
  154. CJ PV5 Upgrades?
  155. New Member - Magnavox Amps
  156. Double parafeed
  157. 6550 grid characteristic help please
  158. Newbie- Tube Testing RF Amp tube
  159. Urgent:Wrongly order 220V Power supply for 230V enviroment
  160. Mono sub-out from one trafo?
  161. Mu Follower to drive a Push-Pull Amplifier?
  162. The 6934A Triode Tube
  163. Constant current sink for 6SN7
  164. 6V6 high voltage
  165. VTL deluxe 100 monoblk (KT88) need help?
  166. Va,Ia exeed limiting values in datasheeds ?
  167. Old DIYtube ST-35 electrolytics - swap?
  168. What Hammond for UK?
  169. What would you build with this transformer set?
  170. EL86 / 6CW5 + 6BQ7A amp design
  171. Western Electric theater amplifiers; how to hook them up?
  172. 12AU7,12B4A PSE schematic needs finishing!
  173. Dual grid and plate pins
  174. Best sounding ECC83 ?
  175. tube output for Playstation 1
  176. 6GX8 as Audio Level Indicator?
  177. help on 12AU7 Preamp circuit
  178. Anyone bought tubes from http://www.nostubestore.com/ ?
  179. Tube pre-amp with exposed tubes?
  180. Using low voltage lamp in power supply
  181. GU 50 monoblock
  182. KT-88 Push Pull with CFB
  183. 12AX7 + ?? Ideas 2A3 // 6L6
  184. Formula for driver current requirement ?
  185. Need a little help with a regulator circuit if you are willing.
  186. Troubleshooting help for 12AQ5 amp
  187. Can anyone help with an ef86 tape preamp mod please?
  188. Herald Amp
  189. To switch B+ or not?
  190. All-tube vs tube/mosfet hybrid ?
  191. 6c33c-b question
  192. 12AT7 substitutes?
  193. 1st project salvaged sears receiver iron need good amp schematic
  194. FM-3 ? About parts replacement in IF stages
  195. simple EL84 parallel?
  196. Finished: Claus Byrtih EL34 amplifier on Isophon BS35 speaker set
  197. Bogen CHB100 Valve Question
  198. 1st build; Adding load to PT secondary
  199. need help RCA RS 199C
  200. Unusually high Gm
  201. RH84 motorboating, stereo vs mono
  202. Use a tube rectifier for grid bias voltage, AA5 Radio tubes and usage.
  203. Cathode bypass with Long tail pair
  204. new chinese tube manufacturer
  205. Black Gate WKZ - can they be used in these circuits?
  206. Yet another question about HV Maida Regs
  207. Question about vacuum tubes
  208. Scott 299D Calibration
  209. Score! Bag-O-tubes!
  210. Building a tube integrated amp
  211. Audio Note Kits L1 Build...
  212. Need help with old mic amp
  213. Temporary hum
  214. Unidentified Tube - One for the detectives!
  215. Rogues?
  216. What about big tube RV278 Telefunken?
  217. variac variable transformer
  218. Tube amp OPT for Headphone Amp? (impedance matching question)
  219. current needed for 4x50l6 & 3x6sn6
  220. 6N11 tube work at 24V power supply?
  221. Heater voltage 5volt!
  222. help me choose a high end opt for tubelabs SE!
  223. 6L6/807 AB2 triode-- screen drive?
  224. help troubleshooting
  225. Anode Follower Article
  226. ECC802S 12AU7 ECC82 heater question
  227. Books for amplifiers
  228. E180F Preamp
  229. Don Allen Amp's ????
  230. To connect or not to connect..........
  231. Phonostage with tube moving coil
  232. 300b tube Temperature?
  233. Center tap transformer for elevated heater supplies
  234. single ended kt88 fuse blowing after an hour
  235. Radiotron question
  236. suggested use for old telefunken tubes
  237. Using different ouputs for two different drivers
  238. Pete Millett Uniamp with 300b
  239. Cary slp-70
  240. How to combine 2 signals from 2 gain stages
  241. Increase B+ supply
  242. Aikido Tetra Sans Phono PCB
  243. Loadlines and distortion (6S33S/6S41S)
  244. home theatre bypass feature
  245. Doubling the power of hifi tube amplifiers
  246. Can this tube be used in audio amplifier?
  247. 100 V OPT
  248. Help me understand tube chart data
  249. Listening preference....
  250. tube socket legs?

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