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  1. GRAAF GAAFiti WFB ONE - Schematic needed
  2. Oscillation WE417A
  3. EL84 fixed fixed bias
  4. Blown stereo
  5. 807/6au6 pure pentode mode amplifier
  6. help with ID'ing a tube
  7. Magnavox 50EH5 Stereo Amp
  8. My new Circlotron OTL tube power Amp.
  9. ideas for a tube eating guitair amp
  10. 6DE4, unused pins
  11. 300B what output transformer Sowter or Lundahl?
  12. 6DJ8 preamp w/balanced input - strange schematic
  13. Screen Grid Regulation Requirements
  14. Advice needed on new 6L6 ro 6V6 SE or SET build
  15. need a little help with an HK solo2 tube receiver
  16. Help me to build Vacuum Tube Amp.
  17. amp with SRPP output stage? post if you know one
  18. Output transformer question
  19. EF86 Phono pre-amp or Mcintosh MC2200?
  20. Transcendar is Branching Out
  21. can SE driven PP be clean enough to sound SE ?
  22. k12-m amp not working
  23. 813 amp and old choke
  24. Several hundred tubes found! What to do!
  25. Possible to convert Audiorom Fu29 to Single end?
  26. Measuring bias
  27. ecc802s SRPP preamplifier
  28. HELP! Capacitor specs for Sonic Frontiers SFC-1 Control Amplifier
  29. Class A KT88 info
  30. What is screen tap of transformer?
  31. Brightest heaters in tubes?
  32. 40% tap or not
  33. 6dj8 phono schematic needed
  34. EL34 Parts..
  35. solid state driven p-p ultralinear
  36. linestage w/separate PSU: where to "split" ?
  37. Anybody know this TELEFUNKEN SE transformer?
  38. Too much feedback?
  39. Tube Power Supply Dummy Load
  40. For 6c33 Fans. A new schematic
  41. WAD phono 3 motorboating with Raphaelite 300b
  42. Help! Tube Tester in Austin or Lago Vista?
  43. Vintage Stromberg Carlson
  44. GM70 and Other LTSpice Tube Models
  45. Please help me understand this feedback
  46. Affordable Valve Company - Re-bias
  47. The effect of different value coupling capacitors?
  48. Closed loop stability help needed.
  49. EAR 509 OPT Impedances
  50. Installing Hammond 1609s in K12-G
  51. 6088 Amplifier
  52. Valve Art kt88 not the same ring getter?
  53. 5mA DC transformer - tube output stage?
  54. Mini amp questions
  55. What mean those russian electronic units ?
  56. Coupling capacitors
  57. Monsters thread (high power tube amps)
  58. CCS on LTP please help
  59. Best type of pre-amp for valve/tube power amp
  60. 12au7 made by Toshiba, Hitachi, Matsushita, RSD, International and Miniwatt?
  61. Load lines
  62. Cold cathode tubes
  63. Redundant CNC stainless steel enclosures
  64. harmonica amp feedback
  65. First try P-P 6S41S design
  66. Help!!! I need to get valve TAW12/20B / TRIODE for use as HF amplifier and oscillator
  67. Velleman K4040 Stereo Vacuum Tube Amplifier Volume Control
  68. 12AT7 Regulated Power Supply
  69. 2A3 to 45 Cathode Wattage?
  70. Cheap Chinese Ebay Amps
  71. Audion Sterling Integrated Amp Version - Stereo MK-I - Extended Live Time wanted
  72. Transformer Center Taps
  73. Output transformer for 18watt
  74. PTX temps
  75. Can A valve amplifier be both Class A and Class B?
  76. DC coupled cathode follower driving me nuts
  77. Vacuum state gone?
  78. 1634 dual triode
  79. Aikido line amp
  80. Winding an ISO TX with pair of inductors
  81. Quad II Switch Mode PSU
  82. What do do with all of these?
  83. global negative feedback in el84 push pull
  84. Old HP transformer - what is it?
  85. FET Phase inverter to drive valve PA
  86. Core Audio 6BC4 buffer problem
  87. JCM Build - Voltage problem!
  88. Power Amplifiers & Gain
  89. Power tube maximum current draw from a power supply
  90. Tube Matching in a Power Amp?
  91. SE stereo / PP mono block schematic choices
  92. How to measure output transformer?
  93. Peavey VTM 60 vs Orange Tiny Terror
  94. Shoddy Packaging
  95. Schematic needed for Manley SnapperŪ from Manley Labs
  96. Resistor, capacitor across output transformer AKAI M-7
  97. eBay&etc cheap tube buffers/preamp .. anything good?
  98. 6N3 Preamp Question
  99. OK guys...be gentle
  100. 6SN7 and DN2540's
  101. 10k and 6k primary windings on OPT. Use for UL?
  102. Settings for PL509, EZ80 tubes on 539c tester
  103. replacing 6LGC with 6550 or KT88
  104. ECC83 input circuitry
  105. Dynaco MK III modifications
  106. SMPS for heaters
  107. Headphone tube-amp with oddball OPT
  108. Neon Lamp Question
  109. Curious old tubes from tandy
  110. 828 Triode Curves?
  111. 813 review
  112. tube circlotron for headphone amplifier
  113. valve headphone pre-amp
  114. Shengyi 6AQ5
  115. Burn in small signal tubes?
  116. 24V powered 6N11 amplifier, 0.25% distortion, pretty good!
  117. SS diode replacements
  118. Bass guitar amp using 832a/GU32 tubes
  119. can you check if everything is ok with el84 schematic please
  120. Advice on this amp schematic please
  121. 8156's
  122. Can't get anything from my new pre-amp
  123. Bottlehead Paramount Question
  124. need help with ac/dc am/fm radio
  125. Peculiar oscillation
  126. ECC83 settings for Taylor 45C
  127. New Jolida 302b amp owner questions
  128. Help with gyrator
  129. Some basic questions...
  130. I have a hard one for you guys
  131. CCS pulsing oscillation problem
  132. tube testers: different gM standards for same tube?
  133. Frank's Pre Still In Vogue?
  134. Home made tube amps
  135. Source for SED "winged C" tubes?
  136. Preamp Help
  137. Push Pull Class A
  138. Multi-Ways Output Transformers
  139. Redplating anomaly?
  140. Marshall JCM900 2500 preamp
  141. Just for fun power poll!
  142. BIASING A JADIS ORCHESTRA
  143. Yaqin MC-50L
  144. CJ PV5 Upgrades?
  145. New Member - Magnavox Amps
  146. Double parafeed
  147. 6550 grid characteristic help please
  148. Newbie- Tube Testing RF Amp tube
  149. Urgent:Wrongly order 220V Power supply for 230V enviroment
  150. Mono sub-out from one trafo?
  151. Mu Follower to drive a Push-Pull Amplifier?
  152. The 6934A Triode Tube
  153. Constant current sink for 6SN7
  154. 6V6 high voltage
  155. VTL deluxe 100 monoblk (KT88) need help?
  156. Va,Ia exeed limiting values in datasheeds ?
  157. Old DIYtube ST-35 electrolytics - swap?
  158. What Hammond for UK?
  159. What would you build with this transformer set?
  160. EL86 / 6CW5 + 6BQ7A amp design
  161. Western Electric theater amplifiers; how to hook them up?
  162. 12AU7,12B4A PSE schematic needs finishing!
  163. Dual grid and plate pins
  164. Best sounding ECC83 ?
  165. tube output for Playstation 1
  166. 6GX8 as Audio Level Indicator?
  167. Wurlitzer 6150 Organ Tube Amp convert Guitar Amp
  168. help on 12AU7 Preamp circuit
  169. Anyone bought tubes from http://www.nostubestore.com/ ?
  170. Tube pre-amp with exposed tubes?
  171. Using low voltage lamp in power supply
  172. GU 50 monoblock
  173. KT-88 Push Pull with CFB
  174. 12AX7 + ?? Ideas 2A3 // 6L6
  175. Formula for driver current requirement ?
  176. Need a little help with a regulator circuit if you are willing.
  177. Troubleshooting help for 12AQ5 amp
  178. Can anyone help with an ef86 tape preamp mod please?
  179. Herald Amp
  180. To switch B+ or not?
  181. All-tube vs tube/mosfet hybrid ?
  182. 6c33c-b question
  183. 12AT7 substitutes?
  184. 1st project salvaged sears receiver iron need good amp schematic
  185. FM-3 ? About parts replacement in IF stages
  186. simple EL84 parallel?
  187. Finished: Claus Byrtih EL34 amplifier on Isophon BS35 speaker set
  188. Yet another resistor thread
  189. Bogen CHB100 Valve Question
  190. 1st build; Adding load to PT secondary
  191. need help RCA RS 199C
  192. Unusually high Gm
  193. RH84 motorboating, stereo vs mono
  194. Use a tube rectifier for grid bias voltage, AA5 Radio tubes and usage.
  195. Cathode bypass with Long tail pair
  196. new chinese tube manufacturer
  197. Black Gate WKZ - can they be used in these circuits?
  198. Yet another question about HV Maida Regs
  199. Question about vacuum tubes
  200. Scott 299D Calibration
  201. Score! Bag-O-tubes!
  202. Building a tube integrated amp
  203. Audio Note Kits L1 Build...
  204. Need help with old mic amp
  205. Temporary hum
  206. Unidentified Tube - One for the detectives!
  207. Rogues?
  208. What about big tube RV278 Telefunken?
  209. variac variable transformer
  210. Tube amp OPT for Headphone Amp? (impedance matching question)
  211. current needed for 4x50l6 & 3x6sn6
  212. 6N11 tube work at 24V power supply?
  213. Heater voltage 5volt!
  214. help me choose a high end opt for tubelabs SE!
  215. 6L6/807 AB2 triode-- screen drive?
  216. help troubleshooting
  217. Anode Follower Article
  218. ECC802S 12AU7 ECC82 heater question
  219. Books for amplifiers
  220. E180F Preamp
  221. Don Allen Amp's ????
  222. To connect or not to connect..........
  223. Phonostage with tube moving coil
  224. 300b tube Temperature?
  225. Center tap transformer for elevated heater supplies
  226. single ended kt88 fuse blowing after an hour
  227. Help getting more gain from a Peavey Butcher
  228. Radiotron question
  229. suggested use for old telefunken tubes
  230. Using different ouputs for two different drivers
  231. Pete Millett Uniamp with 300b
  232. Cary slp-70
  233. How to combine 2 signals from 2 gain stages
  234. Increase B+ supply
  235. Aikido Tetra Sans Phono PCB
  236. Loadlines and distortion (6S33S/6S41S)
  237. home theatre bypass feature
  238. Doubling the power of hifi tube amplifiers
  239. Can this tube be used in audio amplifier?
  240. 100 V OPT
  241. Help me understand tube chart data
  242. Listening preference....
  243. tube socket legs?
  244. Stand alone gain stage pre-amp
  245. I kinda sorta burned up my K12-G power transformer
  246. RCA-182 Tube Amp
  247. Transformer potting material? what material?
  248. Ultimate 6xEL34 PPP monoblocks? Hopefully with your help :)
  249. tube amp/pre in car?
  250. Thorsten's tube Stage for TDA1541A