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  1. Hot tube preamp pedal build
  2. Radford STA100 improvements?
  3. Playmaster unit 2 help needed!
  4. help me build an output transformer
  5. Vintage Magnavox tube amp
  6. Christmas Build, advice needed.
  7. Speaker suggestions for ST-70
  8. Tube markings?
  9. gaumont-kalee
  10. amplifiers audio research D90
  11. 40W Glass A 300B tube schematic needed.
  12. Hum in one channel only
  13. Water cooling Power Tubes
  14. Toroid Output Transformer from Plitron
  15. Scott LK-30 Assembly Manual Needed
  16. HUM STARTS 1 OR 2 HOUR AFTER THE AMP IS ON
  17. The best valve amp!
  18. Equivalents for 12AT7 and 6N11 ? (Sense G3 headphone amp)
  19. More probably stupid questions about feedback
  20. single stage amp?
  21. SS 83 again
  22. Making Spice Models for tubes
  23. Seth mk 2 ???
  24. Colorful inspiration
  25. Testing KT-90's Ei NIs Yugoslavia
  26. El Cheapo Transformer Question
  27. Why does the grid extend so far beyond the anode ?
  28. Valve amplifier identification
  29. E-M-field problem
  30. Effective cathode resistance
  31. Spectrum evaluation ECC82
  32. power d90-b
  33. el34, kt88, kt90, 6550 to 8417 conversion
  34. Do you know these capacitors?
  35. GRAAF GAAFiti WFB ONE - Schematic needed
  36. Oscillation WE417A
  37. EL84 fixed fixed bias
  38. Blown stereo
  39. 807/6au6 pure pentode mode amplifier
  40. help with ID'ing a tube
  41. Magnavox 50EH5 Stereo Amp
  42. My new Circlotron OTL tube power Amp.
  43. ideas for a tube eating guitair amp
  44. 6DE4, unused pins
  45. 300B what output transformer Sowter or Lundahl?
  46. 6DJ8 preamp w/balanced input - strange schematic
  47. Screen Grid Regulation Requirements
  48. Advice needed on new 6L6 ro 6V6 SE or SET build
  49. need a little help with an HK solo2 tube receiver
  50. Help me to build Vacuum Tube Amp.
  51. amp with SRPP output stage? post if you know one
  52. Output transformer question
  53. EF86 Phono pre-amp or Mcintosh MC2200?
  54. Transcendar is Branching Out
  55. can SE driven PP be clean enough to sound SE ?
  56. k12-m amp not working
  57. 813 amp and old choke
  58. Several hundred tubes found! What to do!
  59. Possible to convert Audiorom Fu29 to Single end?
  60. Measuring bias
  61. ecc802s SRPP preamplifier
  62. HELP! Capacitor specs for Sonic Frontiers SFC-1 Control Amplifier
  63. Class A KT88 info
  64. What is screen tap of transformer?
  65. Brightest heaters in tubes?
  66. 40% tap or not
  67. 6dj8 phono schematic needed
  68. EL34 Parts..
  69. solid state driven p-p ultralinear
  70. linestage w/separate PSU: where to "split" ?
  71. Anybody know this TELEFUNKEN SE transformer?
  72. Too much feedback?
  73. Tube Power Supply Dummy Load
  74. For 6c33 Fans. A new schematic
  75. WAD phono 3 motorboating with Raphaelite 300b
  76. Vintage Stromberg Carlson
  77. GM70 and Other LTSpice Tube Models
  78. Please help me understand this feedback
  79. Affordable Valve Company - Re-bias
  80. The effect of different value coupling capacitors?
  81. Closed loop stability help needed.
  82. EAR 509 OPT Impedances
  83. Installing Hammond 1609s in K12-G
  84. 6088 Amplifier
  85. Valve Art kt88 not the same ring getter?
  86. 5mA DC transformer - tube output stage?
  87. Mini amp questions
  88. What mean those russian electronic units ?
  89. Coupling capacitors
  90. Monsters thread (high power tube amps)
  91. CCS on LTP please help
  92. Best type of pre-amp for valve/tube power amp
  93. 12au7 made by Toshiba, Hitachi, Matsushita, RSD, International and Miniwatt?
  94. Load lines
  95. Cold cathode tubes
  96. Redundant CNC stainless steel enclosures
  97. First try P-P 6S41S design
  98. Help!!! I need to get valve TAW12/20B / TRIODE for use as HF amplifier and oscillator
  99. Velleman K4040 Stereo Vacuum Tube Amplifier Volume Control
  100. 12AT7 Regulated Power Supply
  101. 2A3 to 45 Cathode Wattage?
  102. Cheap Chinese Ebay Amps
  103. Audion Sterling Integrated Amp Version - Stereo MK-I - Extended Live Time wanted
  104. Transformer Center Taps
  105. PTX temps
  106. Can A valve amplifier be both Class A and Class B?
  107. got a problem with my scope, need some advice
  108. DC coupled cathode follower driving me nuts
  109. Vacuum state gone?
  110. 1634 dual triode
  111. Aikido line amp
  112. Winding an ISO TX with pair of inductors
  113. Quad II Switch Mode PSU
  114. What do do with all of these?
  115. global negative feedback in el84 push pull
  116. Old HP transformer - what is it?
  117. FET Phase inverter to drive valve PA
  118. Core Audio 6BC4 buffer problem
  119. Power Amplifiers & Gain
  120. Power tube maximum current draw from a power supply
  121. Tube Matching in a Power Amp?
  122. SE stereo / PP mono block schematic choices
  123. How to measure output transformer?
  124. Shoddy Packaging
  125. Schematic needed for Manley SnapperŪ from Manley Labs
  126. Resistor, capacitor across output transformer AKAI M-7
  127. eBay&etc cheap tube buffers/preamp .. anything good?
  128. 6N3 Preamp Question
  129. OK guys...be gentle
  130. 6SN7 and DN2540's
  131. 10k and 6k primary windings on OPT. Use for UL?
  132. Settings for PL509, EZ80 tubes on 539c tester
  133. replacing 6LGC with 6550 or KT88
  134. ECC83 input circuitry
  135. Dynaco MK III modifications
  136. SMPS for heaters
  137. Headphone tube-amp with oddball OPT
  138. Neon Lamp Question
  139. Curious old tubes from tandy
  140. 828 Triode Curves?
  141. 813 review
  142. tube circlotron for headphone amplifier
  143. valve headphone pre-amp
  144. Shengyi 6AQ5
  145. Burn in small signal tubes?
  146. 24V powered 6N11 amplifier, 0.25% distortion, pretty good!
  147. SS diode replacements
  148. can you check if everything is ok with el84 schematic please
  149. Advice on this amp schematic please
  150. 8156's
  151. Can't get anything from my new pre-amp
  152. Bottlehead Paramount Question
  153. need help with ac/dc am/fm radio
  154. Peculiar oscillation
  155. ECC83 settings for Taylor 45C
  156. New Jolida 302b amp owner questions
  157. Help with gyrator
  158. Some basic questions...
  159. I have a hard one for you guys
  160. CCS pulsing oscillation problem
  161. tube testers: different gM standards for same tube?
  162. Frank's Pre Still In Vogue?
  163. Home made tube amps
  164. Source for SED "winged C" tubes?
  165. Preamp Help
  166. Push Pull Class A
  167. Multi-Ways Output Transformers
  168. Redplating anomaly?
  169. Just for fun power poll!
  170. Biasing a Jadis Orchestra
  171. Yaqin MC-50L
  172. CJ PV5 Upgrades?
  173. New Member - Magnavox Amps
  174. Double parafeed
  175. 6550 grid characteristic help please
  176. Newbie- Tube Testing RF Amp tube
  177. Urgent:Wrongly order 220V Power supply for 230V enviroment
  178. Mono sub-out from one trafo?
  179. Mu Follower to drive a Push-Pull Amplifier?
  180. The 6934A Triode Tube
  181. Constant current sink for 6SN7
  182. 6V6 high voltage
  183. VTL deluxe 100 monoblk (KT88) need help?
  184. Va,Ia exeed limiting values in datasheeds ?
  185. Old DIYtube ST-35 electrolytics - swap?
  186. What Hammond for UK?
  187. What would you build with this transformer set?
  188. EL86 / 6CW5 + 6BQ7A amp design
  189. Western Electric theater amplifiers; how to hook them up?
  190. 12AU7,12B4A PSE schematic needs finishing!
  191. Dual grid and plate pins
  192. Best sounding ECC83 ?
  193. tube output for Playstation 1
  194. 6GX8 as Audio Level Indicator?
  195. help on 12AU7 Preamp circuit
  196. Anyone bought tubes from http://www.nostubestore.com/ ?
  197. Tube pre-amp with exposed tubes?
  198. Using low voltage lamp in power supply
  199. GU 50 monoblock
  200. KT-88 Push Pull with CFB
  201. 12AX7 + ?? Ideas 2A3 // 6L6
  202. Formula for driver current requirement ?
  203. Need a little help with a regulator circuit if you are willing.
  204. Troubleshooting help for 12AQ5 amp
  205. Can anyone help with an ef86 tape preamp mod please?
  206. Herald Amp
  207. To switch B+ or not?
  208. All-tube vs tube/mosfet hybrid ?
  209. 6c33c-b question
  210. 12AT7 substitutes?
  211. 1st project salvaged sears receiver iron need good amp schematic
  212. FM-3 ? About parts replacement in IF stages
  213. simple EL84 parallel?
  214. Finished: Claus Byrtih EL34 amplifier on Isophon BS35 speaker set
  215. Bogen CHB100 Valve Question
  216. 1st build; Adding load to PT secondary
  217. need help RCA RS 199C
  218. Unusually high Gm
  219. RH84 motorboating, stereo vs mono
  220. Use a tube rectifier for grid bias voltage, AA5 Radio tubes and usage.
  221. Cathode bypass with Long tail pair
  222. new chinese tube manufacturer
  223. Black Gate WKZ - can they be used in these circuits?
  224. Yet another question about HV Maida Regs
  225. Question about vacuum tubes
  226. Scott 299D Calibration
  227. Score! Bag-O-tubes!
  228. Building a tube integrated amp
  229. Audio Note Kits L1 Build...
  230. Need help with old mic amp
  231. Temporary hum
  232. Unidentified Tube - One for the detectives!
  233. Rogues?
  234. What about big tube RV278 Telefunken?
  235. variac variable transformer
  236. Tube amp OPT for Headphone Amp? (impedance matching question)
  237. current needed for 4x50l6 & 3x6sn6
  238. 6N11 tube work at 24V power supply?
  239. Heater voltage 5volt!
  240. help me choose a high end opt for tubelabs SE!
  241. 6L6/807 AB2 triode-- screen drive?
  242. help troubleshooting
  243. Anode Follower Article
  244. ECC802S 12AU7 ECC82 heater question
  245. Books for amplifiers
  246. E180F Preamp
  247. Don Allen Amp's ????
  248. To connect or not to connect..........
  249. Phonostage with tube moving coil
  250. 300b tube Temperature?

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