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  1. Playmaster unit 2 help needed!
  2. help me build an output transformer
  3. Vintage Magnavox tube amp
  4. Christmas Build, advice needed.
  5. Speaker suggestions for ST-70
  6. Tube markings?
  7. gaumont-kalee
  8. amplifiers audio research D90
  9. 40W Glass A 300B tube schematic needed.
  10. Hum in one channel only
  11. Water cooling Power Tubes
  12. Toroid Output Transformer from Plitron
  13. Scott LK-30 Assembly Manual Needed
  14. HUM STARTS 1 OR 2 HOUR AFTER THE AMP IS ON
  15. The best valve amp!
  16. Equivalents for 12AT7 and 6N11 ? (Sense G3 headphone amp)
  17. More probably stupid questions about feedback
  18. single stage amp?
  19. SS 83 again
  20. Making Spice Models for tubes
  21. Seth mk 2 ???
  22. Colorful inspiration
  23. Testing KT-90's Ei NIs Yugoslavia
  24. El Cheapo Transformer Question
  25. Why does the grid extend so far beyond the anode ?
  26. Valve amplifier identification
  27. E-M-field problem
  28. Effective cathode resistance
  29. Spectrum evaluation ECC82
  30. power d90-b
  31. el34, kt88, kt90, 6550 to 8417 conversion
  32. Do you know these capacitors?
  33. Vintage Capacitor Identification??
  34. GRAAF GAAFiti WFB ONE - Schematic needed
  35. Oscillation WE417A
  36. EL84 fixed fixed bias
  37. Blown stereo
  38. 807/6au6 pure pentode mode amplifier
  39. help with ID'ing a tube
  40. Magnavox 50EH5 Stereo Amp
  41. My new Circlotron OTL tube power Amp.
  42. ideas for a tube eating guitair amp
  43. 6DE4, unused pins
  44. 300B what output transformer Sowter or Lundahl?
  45. 6DJ8 preamp w/balanced input - strange schematic
  46. Screen Grid Regulation Requirements
  47. Advice needed on new 6L6 ro 6V6 SE or SET build
  48. need a little help with an HK solo2 tube receiver
  49. Help me to build Vacuum Tube Amp.
  50. amp with SRPP output stage? post if you know one
  51. Output transformer question
  52. EF86 Phono pre-amp or Mcintosh MC2200?
  53. Transcendar is Branching Out
  54. can SE driven PP be clean enough to sound SE ?
  55. k12-m amp not working
  56. 813 amp and old choke
  57. Several hundred tubes found! What to do!
  58. Possible to convert Audiorom Fu29 to Single end?
  59. Measuring bias
  60. ecc802s SRPP preamplifier
  61. HELP! Capacitor specs for Sonic Frontiers SFC-1 Control Amplifier
  62. Class A KT88 info
  63. What is screen tap of transformer?
  64. Brightest heaters in tubes?
  65. 40% tap or not
  66. 6dj8 phono schematic needed
  67. EL34 Parts..
  68. solid state driven p-p ultralinear
  69. linestage w/separate PSU: where to "split" ?
  70. Anybody know this TELEFUNKEN SE transformer?
  71. Too much feedback?
  72. Tube Power Supply Dummy Load
  73. For 6c33 Fans. A new schematic
  74. WAD phono 3 motorboating with Raphaelite 300b
  75. Help! Tube Tester in Austin or Lago Vista?
  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. Output transformer for 18watt
  106. PTX temps
  107. Can A valve amplifier be both Class A and Class B?
  108. got a problem with my scope, need some advice
  109. DC coupled cathode follower driving me nuts
  110. Vacuum state gone?
  111. 1634 dual triode
  112. Aikido line amp
  113. Winding an ISO TX with pair of inductors
  114. Quad II Switch Mode PSU
  115. What do do with all of these?
  116. global negative feedback in el84 push pull
  117. Old HP transformer - what is it?
  118. FET Phase inverter to drive valve PA
  119. Core Audio 6BC4 buffer problem
  120. JCM Build - Voltage problem!
  121. Power Amplifiers & Gain
  122. Power tube maximum current draw from a power supply
  123. Tube Matching in a Power Amp?
  124. SE stereo / PP mono block schematic choices
  125. How to measure output transformer?
  126. Peavey VTM 60 vs Orange Tiny Terror
  127. Shoddy Packaging
  128. Schematic needed for Manley SnapperŪ from Manley Labs
  129. Resistor, capacitor across output transformer AKAI M-7
  130. eBay&etc cheap tube buffers/preamp .. anything good?
  131. 6N3 Preamp Question
  132. OK guys...be gentle
  133. 6SN7 and DN2540's
  134. 10k and 6k primary windings on OPT. Use for UL?
  135. Settings for PL509, EZ80 tubes on 539c tester
  136. replacing 6LGC with 6550 or KT88
  137. ECC83 input circuitry
  138. Dynaco MK III modifications
  139. SMPS for heaters
  140. Headphone tube-amp with oddball OPT
  141. Neon Lamp Question
  142. Curious old tubes from tandy
  143. 828 Triode Curves?
  144. 813 review
  145. tube circlotron for headphone amplifier
  146. valve headphone pre-amp
  147. Shengyi 6AQ5
  148. Burn in small signal tubes?
  149. 24V powered 6N11 amplifier, 0.25% distortion, pretty good!
  150. SS diode replacements
  151. Bass guitar amp using 832a/GU32 tubes
  152. can you check if everything is ok with el84 schematic please
  153. Advice on this amp schematic please
  154. 8156's
  155. Can't get anything from my new pre-amp
  156. Bottlehead Paramount Question
  157. need help with ac/dc am/fm radio
  158. Peculiar oscillation
  159. ECC83 settings for Taylor 45C
  160. New Jolida 302b amp owner questions
  161. Help with gyrator
  162. Some basic questions...
  163. I have a hard one for you guys
  164. CCS pulsing oscillation problem
  165. tube testers: different gM standards for same tube?
  166. Frank's Pre Still In Vogue?
  167. Home made tube amps
  168. Source for SED "winged C" tubes?
  169. Preamp Help
  170. Push Pull Class A
  171. Multi-Ways Output Transformers
  172. Redplating anomaly?
  173. Marshall JCM900 2500 preamp
  174. Just for fun power poll!
  175. BIASING A JADIS ORCHESTRA
  176. Yaqin MC-50L
  177. CJ PV5 Upgrades?
  178. New Member - Magnavox Amps
  179. Double parafeed
  180. 6550 grid characteristic help please
  181. Newbie- Tube Testing RF Amp tube
  182. Urgent:Wrongly order 220V Power supply for 230V enviroment
  183. Mono sub-out from one trafo?
  184. Mu Follower to drive a Push-Pull Amplifier?
  185. The 6934A Triode Tube
  186. Constant current sink for 6SN7
  187. 6V6 high voltage
  188. VTL deluxe 100 monoblk (KT88) need help?
  189. Va,Ia exeed limiting values in datasheeds ?
  190. Old DIYtube ST-35 electrolytics - swap?
  191. What Hammond for UK?
  192. What would you build with this transformer set?
  193. EL86 / 6CW5 + 6BQ7A amp design
  194. Western Electric theater amplifiers; how to hook them up?
  195. 12AU7,12B4A PSE schematic needs finishing!
  196. Dual grid and plate pins
  197. Best sounding ECC83 ?
  198. tube output for Playstation 1
  199. 6GX8 as Audio Level Indicator?
  200. Wurlitzer 6150 Organ Tube Amp convert Guitar Amp
  201. help on 12AU7 Preamp circuit
  202. Anyone bought tubes from http://www.nostubestore.com/ ?
  203. Tube pre-amp with exposed tubes?
  204. Using low voltage lamp in power supply
  205. GU 50 monoblock
  206. KT-88 Push Pull with CFB
  207. 12AX7 + ?? Ideas 2A3 // 6L6
  208. Formula for driver current requirement ?
  209. Need a little help with a regulator circuit if you are willing.
  210. Troubleshooting help for 12AQ5 amp
  211. Can anyone help with an ef86 tape preamp mod please?
  212. Herald Amp
  213. To switch B+ or not?
  214. All-tube vs tube/mosfet hybrid ?
  215. 6c33c-b question
  216. 12AT7 substitutes?
  217. 1st project salvaged sears receiver iron need good amp schematic
  218. FM-3 ? About parts replacement in IF stages
  219. simple EL84 parallel?
  220. Finished: Claus Byrtih EL34 amplifier on Isophon BS35 speaker set
  221. Yet another resistor thread
  222. Bogen CHB100 Valve Question
  223. 1st build; Adding load to PT secondary
  224. need help RCA RS 199C
  225. Unusually high Gm
  226. RH84 motorboating, stereo vs mono
  227. Use a tube rectifier for grid bias voltage, AA5 Radio tubes and usage.
  228. Cathode bypass with Long tail pair
  229. new chinese tube manufacturer
  230. Black Gate WKZ - can they be used in these circuits?
  231. Yet another question about HV Maida Regs
  232. Question about vacuum tubes
  233. Scott 299D Calibration
  234. Score! Bag-O-tubes!
  235. Building a tube integrated amp
  236. Audio Note Kits L1 Build...
  237. Need help with old mic amp
  238. Temporary hum
  239. Unidentified Tube - One for the detectives!
  240. Rogues?
  241. What about big tube RV278 Telefunken?
  242. variac variable transformer
  243. Tube amp OPT for Headphone Amp? (impedance matching question)
  244. current needed for 4x50l6 & 3x6sn6
  245. 6N11 tube work at 24V power supply?
  246. Heater voltage 5volt!
  247. help me choose a high end opt for tubelabs SE!
  248. 6L6/807 AB2 triode-- screen drive?
  249. help troubleshooting
  250. Anode Follower Article

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