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  1. Tube Date Code
  2. For new members....
  3. Graphite ring on sweep tubes
  4. 6N6P tube - focus on
  5. Vox Guitar Amp Created a Revolution
  6. Hot tube preamp pedal build
  7. Counterpoint Electronics/Counterpoint Acoustics/Counterpoint Audio
  8. Radford STA100 improvements?
  9. Playmaster unit 2 help needed!
  10. help me build an output transformer
  11. Vintage Magnavox tube amp
  12. Christmas Build, advice needed.
  13. Speaker suggestions for ST-70
  14. Tube markings?
  15. gaumont-kalee
  16. amplifiers audio research D90
  17. 40W Glass A 300B tube schematic needed.
  18. Hum in one channel only
  19. Water cooling Power Tubes
  20. Toroid Output Transformer from Plitron
  21. Scott LK-30 Assembly Manual Needed
  22. HUM STARTS 1 OR 2 HOUR AFTER THE AMP IS ON
  23. The best valve amp!
  24. Equivalents for 12AT7 and 6N11 ? (Sense G3 headphone amp)
  25. More probably stupid questions about feedback
  26. single stage amp?
  27. SS 83 again
  28. Making Spice Models for tubes
  29. Seth mk 2 ???
  30. Colorful inspiration
  31. Testing KT-90's Ei NIs Yugoslavia
  32. El Cheapo Transformer Question
  33. Why does the grid extend so far beyond the anode ?
  34. Valve amplifier identification
  35. E-M-field problem
  36. Effective cathode resistance
  37. Spectrum evaluation ECC82
  38. power d90-b
  39. el34, kt88, kt90, 6550 to 8417 conversion
  40. Do you know these capacitors?
  41. Vintage Capacitor Identification??
  42. GRAAF GAAFiti WFB ONE - Schematic needed
  43. Oscillation WE417A
  44. EL84 fixed fixed bias
  45. Blown stereo
  46. 807/6au6 pure pentode mode amplifier
  47. help with ID'ing a tube
  48. Magnavox 50EH5 Stereo Amp
  49. My new Circlotron OTL tube power Amp.
  50. ideas for a tube eating guitair amp
  51. 6DE4, unused pins
  52. 300B what output transformer Sowter or Lundahl?
  53. 6DJ8 preamp w/balanced input - strange schematic
  54. Screen Grid Regulation Requirements
  55. Advice needed on new 6L6 ro 6V6 SE or SET build
  56. need a little help with an HK solo2 tube receiver
  57. Help me to build Vacuum Tube Amp.
  58. amp with SRPP output stage? post if you know one
  59. Output transformer question
  60. EF86 Phono pre-amp or Mcintosh MC2200?
  61. Transcendar is Branching Out
  62. can SE driven PP be clean enough to sound SE ?
  63. k12-m amp not working
  64. 813 amp and old choke
  65. Several hundred tubes found! What to do!
  66. Possible to convert Audiorom Fu29 to Single end?
  67. Measuring bias
  68. ecc802s SRPP preamplifier
  69. HELP! Capacitor specs for Sonic Frontiers SFC-1 Control Amplifier
  70. Class A KT88 info
  71. What is screen tap of transformer?
  72. Brightest heaters in tubes?
  73. 40% tap or not
  74. 6dj8 phono schematic needed
  75. EL34 Parts..
  76. solid state driven p-p ultralinear
  77. linestage w/separate PSU: where to "split" ?
  78. Anybody know this TELEFUNKEN SE transformer?
  79. Too much feedback?
  80. Tube Power Supply Dummy Load
  81. For 6c33 Fans. A new schematic
  82. WAD phono 3 motorboating with Raphaelite 300b
  83. Help! Tube Tester in Austin or Lago Vista?
  84. Vintage Stromberg Carlson
  85. GM70 and Other LTSpice Tube Models
  86. Please help me understand this feedback
  87. Affordable Valve Company - Re-bias
  88. The effect of different value coupling capacitors?
  89. Closed loop stability help needed.
  90. EAR 509 OPT Impedances
  91. Installing Hammond 1609s in K12-G
  92. 6088 Amplifier
  93. Valve Art kt88 not the same ring getter?
  94. 5mA DC transformer - tube output stage?
  95. Mini amp questions
  96. What mean those russian electronic units ?
  97. Coupling capacitors
  98. Monsters thread (high power tube amps)
  99. CCS on LTP please help
  100. Best type of pre-amp for valve/tube power amp
  101. 12au7 made by Toshiba, Hitachi, Matsushita, RSD, International and Miniwatt?
  102. Load lines
  103. Cold cathode tubes
  104. Redundant CNC stainless steel enclosures
  105. First try P-P 6S41S design
  106. Help!!! I need to get valve TAW12/20B / TRIODE for use as HF amplifier and oscillator
  107. Velleman K4040 Stereo Vacuum Tube Amplifier Volume Control
  108. 12AT7 Regulated Power Supply
  109. 2A3 to 45 Cathode Wattage?
  110. Cheap Chinese Ebay Amps
  111. Audion Sterling Integrated Amp Version - Stereo MK-I - Extended Live Time wanted
  112. Transformer Center Taps
  113. Output transformer for 18watt
  114. PTX temps
  115. Can A valve amplifier be both Class A and Class B?
  116. got a problem with my scope, need some advice
  117. DC coupled cathode follower driving me nuts
  118. Vacuum state gone?
  119. 1634 dual triode
  120. Aikido line amp
  121. Winding an ISO TX with pair of inductors
  122. Quad II Switch Mode PSU
  123. What do do with all of these?
  124. global negative feedback in el84 push pull
  125. Old HP transformer - what is it?
  126. FET Phase inverter to drive valve PA
  127. Core Audio 6BC4 buffer problem
  128. JCM Build - Voltage problem!
  129. Power Amplifiers & Gain
  130. Power tube maximum current draw from a power supply
  131. Tube Matching in a Power Amp?
  132. SE stereo / PP mono block schematic choices
  133. How to measure output transformer?
  134. Peavey VTM 60 vs Orange Tiny Terror
  135. Shoddy Packaging
  136. Schematic needed for Manley SnapperŪ from Manley Labs
  137. Resistor, capacitor across output transformer AKAI M-7
  138. eBay&etc cheap tube buffers/preamp .. anything good?
  139. 6N3 Preamp Question
  140. OK guys...be gentle
  141. 6SN7 and DN2540's
  142. 10k and 6k primary windings on OPT. Use for UL?
  143. Settings for PL509, EZ80 tubes on 539c tester
  144. replacing 6LGC with 6550 or KT88
  145. ECC83 input circuitry
  146. Dynaco MK III modifications
  147. SMPS for heaters
  148. Headphone tube-amp with oddball OPT
  149. Neon Lamp Question
  150. Curious old tubes from tandy
  151. 828 Triode Curves?
  152. 813 review
  153. tube circlotron for headphone amplifier
  154. valve headphone pre-amp
  155. Shengyi 6AQ5
  156. Burn in small signal tubes?
  157. 24V powered 6N11 amplifier, 0.25% distortion, pretty good!
  158. SS diode replacements
  159. Bass guitar amp using 832a/GU32 tubes
  160. can you check if everything is ok with el84 schematic please
  161. Advice on this amp schematic please
  162. 8156's
  163. Can't get anything from my new pre-amp
  164. Bottlehead Paramount Question
  165. need help with ac/dc am/fm radio
  166. Peculiar oscillation
  167. ECC83 settings for Taylor 45C
  168. New Jolida 302b amp owner questions
  169. Help with gyrator
  170. Some basic questions...
  171. I have a hard one for you guys
  172. CCS pulsing oscillation problem
  173. tube testers: different gM standards for same tube?
  174. Frank's Pre Still In Vogue?
  175. Home made tube amps
  176. Source for SED "winged C" tubes?
  177. Preamp Help
  178. Push Pull Class A
  179. Multi-Ways Output Transformers
  180. Redplating anomaly?
  181. Marshall JCM900 2500 preamp
  182. Just for fun power poll!
  183. BIASING A JADIS ORCHESTRA
  184. Yaqin MC-50L
  185. CJ PV5 Upgrades?
  186. New Member - Magnavox Amps
  187. Double parafeed
  188. 6550 grid characteristic help please
  189. Newbie- Tube Testing RF Amp tube
  190. Urgent:Wrongly order 220V Power supply for 230V enviroment
  191. Mono sub-out from one trafo?
  192. Mu Follower to drive a Push-Pull Amplifier?
  193. The 6934A Triode Tube
  194. Constant current sink for 6SN7
  195. 6V6 high voltage
  196. VTL deluxe 100 monoblk (KT88) need help?
  197. Va,Ia exeed limiting values in datasheeds ?
  198. Old DIYtube ST-35 electrolytics - swap?
  199. What Hammond for UK?
  200. What would you build with this transformer set?
  201. EL86 / 6CW5 + 6BQ7A amp design
  202. Western Electric theater amplifiers; how to hook them up?
  203. 12AU7,12B4A PSE schematic needs finishing!
  204. Dual grid and plate pins
  205. Best sounding ECC83 ?
  206. tube output for Playstation 1
  207. 6GX8 as Audio Level Indicator?
  208. Wurlitzer 6150 Organ Tube Amp convert Guitar Amp
  209. help on 12AU7 Preamp circuit
  210. Anyone bought tubes from http://www.nostubestore.com/ ?
  211. Tube pre-amp with exposed tubes?
  212. Using low voltage lamp in power supply
  213. GU 50 monoblock
  214. KT-88 Push Pull with CFB
  215. 12AX7 + ?? Ideas 2A3 // 6L6
  216. Formula for driver current requirement ?
  217. Need a little help with a regulator circuit if you are willing.
  218. Troubleshooting help for 12AQ5 amp
  219. Can anyone help with an ef86 tape preamp mod please?
  220. Herald Amp
  221. To switch B+ or not?
  222. All-tube vs tube/mosfet hybrid ?
  223. 6c33c-b question
  224. 12AT7 substitutes?
  225. 1st project salvaged sears receiver iron need good amp schematic
  226. FM-3 ? About parts replacement in IF stages
  227. simple EL84 parallel?
  228. Finished: Claus Byrtih EL34 amplifier on Isophon BS35 speaker set
  229. Yet another resistor thread
  230. Bogen CHB100 Valve Question
  231. 1st build; Adding load to PT secondary
  232. need help RCA RS 199C
  233. Unusually high Gm
  234. RH84 motorboating, stereo vs mono
  235. Use a tube rectifier for grid bias voltage, AA5 Radio tubes and usage.
  236. Cathode bypass with Long tail pair
  237. new chinese tube manufacturer
  238. Black Gate WKZ - can they be used in these circuits?
  239. Yet another question about HV Maida Regs
  240. Question about vacuum tubes
  241. Scott 299D Calibration
  242. Score! Bag-O-tubes!
  243. Building a tube integrated amp
  244. Audio Note Kits L1 Build...
  245. Need help with old mic amp
  246. Temporary hum
  247. Unidentified Tube - One for the detectives!
  248. Rogues?
  249. What about big tube RV278 Telefunken?
  250. variac variable transformer

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