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  1. Best Valve pre-amp match for ME 550 amp
  2. Fisher 500c
  3. From old Philips tube books , just for tube audio DIY friends !
  4. UFO
  5. Adding a preamp?
  6. XS-225 valve amp circuit.
  7. LS7/CV1660 curves
  8. Differences between 12V6 tube and 12A6 tube?
  9. Please check my schematic
  10. 12W Push pull w/6C4C
  11. Tube Date Code
  12. For new members....
  13. Graphite ring on sweep tubes
  14. 6N6P tube - focus on
  15. Vox Guitar Amp Created a Revolution
  16. Hot tube preamp pedal build
  17. Counterpoint Electronics/Counterpoint Acoustics/Counterpoint Audio
  18. Radford STA100 improvements?
  19. Playmaster unit 2 help needed!
  20. help me build an output transformer
  21. Vintage Magnavox tube amp
  22. Christmas Build, advice needed.
  23. Speaker suggestions for ST-70
  24. Tube markings?
  25. gaumont-kalee
  26. amplifiers audio research D90
  27. 40W Glass A 300B tube schematic needed.
  28. Hum in one channel only
  29. Water cooling Power Tubes
  30. Toroid Output Transformer from Plitron
  31. Scott LK-30 Assembly Manual Needed
  32. HUM STARTS 1 OR 2 HOUR AFTER THE AMP IS ON
  33. The best valve amp!
  34. Equivalents for 12AT7 and 6N11 ? (Sense G3 headphone amp)
  35. More probably stupid questions about feedback
  36. single stage amp?
  37. SS 83 again
  38. Making Spice Models for tubes
  39. Seth mk 2 ???
  40. Colorful inspiration
  41. Testing KT-90's Ei NIs Yugoslavia
  42. El Cheapo Transformer Question
  43. Why does the grid extend so far beyond the anode ?
  44. Valve amplifier identification
  45. E-M-field problem
  46. Effective cathode resistance
  47. Spectrum evaluation ECC82
  48. power d90-b
  49. el34, kt88, kt90, 6550 to 8417 conversion
  50. Do you know these capacitors?
  51. Vintage Capacitor Identification??
  52. GRAAF GAAFiti WFB ONE - Schematic needed
  53. Oscillation WE417A
  54. EL84 fixed fixed bias
  55. Blown stereo
  56. 807/6au6 pure pentode mode amplifier
  57. help with ID'ing a tube
  58. Magnavox 50EH5 Stereo Amp
  59. My new Circlotron OTL tube power Amp.
  60. ideas for a tube eating guitair amp
  61. 6DE4, unused pins
  62. 300B what output transformer Sowter or Lundahl?
  63. 6DJ8 preamp w/balanced input - strange schematic
  64. Screen Grid Regulation Requirements
  65. Advice needed on new 6L6 ro 6V6 SE or SET build
  66. need a little help with an HK solo2 tube receiver
  67. Help me to build Vacuum Tube Amp.
  68. amp with SRPP output stage? post if you know one
  69. Output transformer question
  70. EF86 Phono pre-amp or Mcintosh MC2200?
  71. Transcendar is Branching Out
  72. can SE driven PP be clean enough to sound SE ?
  73. k12-m amp not working
  74. 813 amp and old choke
  75. Several hundred tubes found! What to do!
  76. Possible to convert Audiorom Fu29 to Single end?
  77. Measuring bias
  78. ecc802s SRPP preamplifier
  79. HELP! Capacitor specs for Sonic Frontiers SFC-1 Control Amplifier
  80. Class A KT88 info
  81. What is screen tap of transformer?
  82. Brightest heaters in tubes?
  83. 40% tap or not
  84. 6dj8 phono schematic needed
  85. EL34 Parts..
  86. solid state driven p-p ultralinear
  87. linestage w/separate PSU: where to "split" ?
  88. Anybody know this TELEFUNKEN SE transformer?
  89. Too much feedback?
  90. Tube Power Supply Dummy Load
  91. For 6c33 Fans. A new schematic
  92. WAD phono 3 motorboating with Raphaelite 300b
  93. Help! Tube Tester in Austin or Lago Vista?
  94. Vintage Stromberg Carlson
  95. GM70 and Other LTSpice Tube Models
  96. Please help me understand this feedback
  97. Affordable Valve Company - Re-bias
  98. The effect of different value coupling capacitors?
  99. Closed loop stability help needed.
  100. EAR 509 OPT Impedances
  101. Installing Hammond 1609s in K12-G
  102. 6088 Amplifier
  103. Valve Art kt88 not the same ring getter?
  104. 5mA DC transformer - tube output stage?
  105. Mini amp questions
  106. What mean those russian electronic units ?
  107. Coupling capacitors
  108. Monsters thread (high power tube amps)
  109. CCS on LTP please help
  110. Best type of pre-amp for valve/tube power amp
  111. 12au7 made by Toshiba, Hitachi, Matsushita, RSD, International and Miniwatt?
  112. Load lines
  113. Cold cathode tubes
  114. Redundant CNC stainless steel enclosures
  115. First try P-P 6S41S design
  116. Help!!! I need to get valve TAW12/20B / TRIODE for use as HF amplifier and oscillator
  117. Velleman K4040 Stereo Vacuum Tube Amplifier Volume Control
  118. 12AT7 Regulated Power Supply
  119. 2A3 to 45 Cathode Wattage?
  120. Cheap Chinese Ebay Amps
  121. Audion Sterling Integrated Amp Version - Stereo MK-I - Extended Live Time wanted
  122. Transformer Center Taps
  123. Output transformer for 18watt
  124. PTX temps
  125. Can A valve amplifier be both Class A and Class B?
  126. got a problem with my scope, need some advice
  127. DC coupled cathode follower driving me nuts
  128. Vacuum state gone?
  129. 1634 dual triode
  130. Aikido line amp
  131. Winding an ISO TX with pair of inductors
  132. Quad II Switch Mode PSU
  133. What do do with all of these?
  134. global negative feedback in el84 push pull
  135. Old HP transformer - what is it?
  136. FET Phase inverter to drive valve PA
  137. Core Audio 6BC4 buffer problem
  138. JCM Build - Voltage problem!
  139. Power Amplifiers & Gain
  140. Power tube maximum current draw from a power supply
  141. Tube Matching in a Power Amp?
  142. SE stereo / PP mono block schematic choices
  143. How to measure output transformer?
  144. Peavey VTM 60 vs Orange Tiny Terror
  145. Shoddy Packaging
  146. Schematic needed for Manley SnapperŪ from Manley Labs
  147. Resistor, capacitor across output transformer AKAI M-7
  148. eBay&etc cheap tube buffers/preamp .. anything good?
  149. 6N3 Preamp Question
  150. OK guys...be gentle
  151. 6SN7 and DN2540's
  152. 10k and 6k primary windings on OPT. Use for UL?
  153. Settings for PL509, EZ80 tubes on 539c tester
  154. replacing 6LGC with 6550 or KT88
  155. ECC83 input circuitry
  156. Dynaco MK III modifications
  157. SMPS for heaters
  158. Headphone tube-amp with oddball OPT
  159. Neon Lamp Question
  160. Curious old tubes from tandy
  161. 828 Triode Curves?
  162. 813 review
  163. tube circlotron for headphone amplifier
  164. valve headphone pre-amp
  165. Shengyi 6AQ5
  166. Burn in small signal tubes?
  167. 24V powered 6N11 amplifier, 0.25% distortion, pretty good!
  168. SS diode replacements
  169. Bass guitar amp using 832a/GU32 tubes
  170. can you check if everything is ok with el84 schematic please
  171. Advice on this amp schematic please
  172. 8156's
  173. Can't get anything from my new pre-amp
  174. Bottlehead Paramount Question
  175. need help with ac/dc am/fm radio
  176. Peculiar oscillation
  177. ECC83 settings for Taylor 45C
  178. New Jolida 302b amp owner questions
  179. Help with gyrator
  180. Some basic questions...
  181. I have a hard one for you guys
  182. CCS pulsing oscillation problem
  183. tube testers: different gM standards for same tube?
  184. Frank's Pre Still In Vogue?
  185. Home made tube amps
  186. Source for SED "winged C" tubes?
  187. Preamp Help
  188. Push Pull Class A
  189. Multi-Ways Output Transformers
  190. Redplating anomaly?
  191. Marshall JCM900 2500 preamp
  192. Just for fun power poll!
  193. BIASING A JADIS ORCHESTRA
  194. Yaqin MC-50L
  195. CJ PV5 Upgrades?
  196. New Member - Magnavox Amps
  197. Double parafeed
  198. 6550 grid characteristic help please
  199. Newbie- Tube Testing RF Amp tube
  200. Urgent:Wrongly order 220V Power supply for 230V enviroment
  201. Mono sub-out from one trafo?
  202. Mu Follower to drive a Push-Pull Amplifier?
  203. The 6934A Triode Tube
  204. Constant current sink for 6SN7
  205. 6V6 high voltage
  206. VTL deluxe 100 monoblk (KT88) need help?
  207. Va,Ia exeed limiting values in datasheeds ?
  208. Old DIYtube ST-35 electrolytics - swap?
  209. What Hammond for UK?
  210. What would you build with this transformer set?
  211. EL86 / 6CW5 + 6BQ7A amp design
  212. Western Electric theater amplifiers; how to hook them up?
  213. 12AU7,12B4A PSE schematic needs finishing!
  214. Dual grid and plate pins
  215. Best sounding ECC83 ?
  216. tube output for Playstation 1
  217. 6GX8 as Audio Level Indicator?
  218. Wurlitzer 6150 Organ Tube Amp convert Guitar Amp
  219. help on 12AU7 Preamp circuit
  220. Anyone bought tubes from http://www.nostubestore.com/ ?
  221. Tube pre-amp with exposed tubes?
  222. Using low voltage lamp in power supply
  223. GU 50 monoblock
  224. KT-88 Push Pull with CFB
  225. 12AX7 + ?? Ideas 2A3 // 6L6
  226. Formula for driver current requirement ?
  227. Need a little help with a regulator circuit if you are willing.
  228. Troubleshooting help for 12AQ5 amp
  229. Can anyone help with an ef86 tape preamp mod please?
  230. Herald Amp
  231. To switch B+ or not?
  232. All-tube vs tube/mosfet hybrid ?
  233. 6c33c-b question
  234. 12AT7 substitutes?
  235. 1st project salvaged sears receiver iron need good amp schematic
  236. FM-3 ? About parts replacement in IF stages
  237. simple EL84 parallel?
  238. Finished: Claus Byrtih EL34 amplifier on Isophon BS35 speaker set
  239. Yet another resistor thread
  240. Bogen CHB100 Valve Question
  241. 1st build; Adding load to PT secondary
  242. need help RCA RS 199C
  243. Unusually high Gm
  244. RH84 motorboating, stereo vs mono
  245. Use a tube rectifier for grid bias voltage, AA5 Radio tubes and usage.
  246. Cathode bypass with Long tail pair
  247. new chinese tube manufacturer
  248. Black Gate WKZ - can they be used in these circuits?
  249. Yet another question about HV Maida Regs
  250. Question about vacuum tubes

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