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  1. Heathkit 51-29 output transformers issure
  2. 6AS7 Model
  3. 26H choke good enough for a grid or anode choke?
  4. Russian 6R2P for small amp.
  5. Power transformer primary is open.
  6. Rectifier oddness
  7. First Tube Build, Thoughts?
  8. Output Transformers
  9. Lazy Sunday 6SN7 Preamp
  10. Audio research VT200 Biasing & Schematic
  11. finished my new preamplifier!!
  12. What would be the correct output cap for this OTL Headphone Amp?
  13. Full Bridge Rectifier With Tubes
  14. Looking for data sheet for GE JAN 6146W/7212
  15. Best Valve pre-amp match for ME 550 amp
  16. Fisher 500c
  17. From old Philips tube books , just for tube audio DIY friends !
  18. UFO
  19. Adding a preamp?
  20. XS-225 valve amp circuit.
  21. LS7/CV1660 curves
  22. Differences between 12V6 tube and 12A6 tube?
  23. Please check my schematic
  24. 12W Push pull w/6C4C
  25. Tube Date Code
  26. For new members....
  27. Graphite ring on sweep tubes
  28. 6N6P tube - focus on
  29. Hot tube preamp pedal build
  30. Counterpoint Electronics/Counterpoint Acoustics/Counterpoint Audio
  31. Radford STA100 improvements?
  32. Playmaster unit 2 help needed!
  33. help me build an output transformer
  34. Vintage Magnavox tube amp
  35. Christmas Build, advice needed.
  36. Speaker suggestions for ST-70
  37. Tube markings?
  38. gaumont-kalee
  39. amplifiers audio research D90
  40. 40W Glass A 300B tube schematic needed.
  41. Hum in one channel only
  42. Water cooling Power Tubes
  43. Toroid Output Transformer from Plitron
  44. Scott LK-30 Assembly Manual Needed
  45. HUM STARTS 1 OR 2 HOUR AFTER THE AMP IS ON
  46. The best valve amp!
  47. Equivalents for 12AT7 and 6N11 ? (Sense G3 headphone amp)
  48. More probably stupid questions about feedback
  49. single stage amp?
  50. SS 83 again
  51. Making Spice Models for tubes
  52. Seth mk 2 ???
  53. Colorful inspiration
  54. Testing KT-90's Ei NIs Yugoslavia
  55. El Cheapo Transformer Question
  56. Why does the grid extend so far beyond the anode ?
  57. Valve amplifier identification
  58. E-M-field problem
  59. Effective cathode resistance
  60. Spectrum evaluation ECC82
  61. power d90-b
  62. el34, kt88, kt90, 6550 to 8417 conversion
  63. Do you know these capacitors?
  64. Vintage Capacitor Identification??
  65. GRAAF GAAFiti WFB ONE - Schematic needed
  66. Oscillation WE417A
  67. EL84 fixed fixed bias
  68. Blown stereo
  69. 807/6au6 pure pentode mode amplifier
  70. help with ID'ing a tube
  71. Magnavox 50EH5 Stereo Amp
  72. My new Circlotron OTL tube power Amp.
  73. ideas for a tube eating guitair amp
  74. 6DE4, unused pins
  75. 300B what output transformer Sowter or Lundahl?
  76. 6DJ8 preamp w/balanced input - strange schematic
  77. Screen Grid Regulation Requirements
  78. Advice needed on new 6L6 ro 6V6 SE or SET build
  79. need a little help with an HK solo2 tube receiver
  80. Help me to build Vacuum Tube Amp.
  81. amp with SRPP output stage? post if you know one
  82. Output transformer question
  83. EF86 Phono pre-amp or Mcintosh MC2200?
  84. Transcendar is Branching Out
  85. can SE driven PP be clean enough to sound SE ?
  86. k12-m amp not working
  87. 813 amp and old choke
  88. Several hundred tubes found! What to do!
  89. Possible to convert Audiorom Fu29 to Single end?
  90. Measuring bias
  91. ecc802s SRPP preamplifier
  92. HELP! Capacitor specs for Sonic Frontiers SFC-1 Control Amplifier
  93. Class A KT88 info
  94. What is screen tap of transformer?
  95. Brightest heaters in tubes?
  96. 40% tap or not
  97. 6dj8 phono schematic needed
  98. EL34 Parts..
  99. solid state driven p-p ultralinear
  100. linestage w/separate PSU: where to "split" ?
  101. Anybody know this TELEFUNKEN SE transformer?
  102. Too much feedback?
  103. Tube Power Supply Dummy Load
  104. For 6c33 Fans. A new schematic
  105. WAD phono 3 motorboating with Raphaelite 300b
  106. Help! Tube Tester in Austin or Lago Vista?
  107. Vintage Stromberg Carlson
  108. GM70 and Other LTSpice Tube Models
  109. Please help me understand this feedback
  110. Affordable Valve Company - Re-bias
  111. The effect of different value coupling capacitors?
  112. Closed loop stability help needed.
  113. EAR 509 OPT Impedances
  114. Installing Hammond 1609s in K12-G
  115. 6088 Amplifier
  116. Valve Art kt88 not the same ring getter?
  117. 5mA DC transformer - tube output stage?
  118. Mini amp questions
  119. What mean those russian electronic units ?
  120. Coupling capacitors
  121. Monsters thread (high power tube amps)
  122. CCS on LTP please help
  123. Best type of pre-amp for valve/tube power amp
  124. 12au7 made by Toshiba, Hitachi, Matsushita, RSD, International and Miniwatt?
  125. Load lines
  126. Cold cathode tubes
  127. Redundant CNC stainless steel enclosures
  128. First try P-P 6S41S design
  129. Help!!! I need to get valve TAW12/20B / TRIODE for use as HF amplifier and oscillator
  130. Velleman K4040 Stereo Vacuum Tube Amplifier Volume Control
  131. 12AT7 Regulated Power Supply
  132. 2A3 to 45 Cathode Wattage?
  133. Cheap Chinese Ebay Amps
  134. Audion Sterling Integrated Amp Version - Stereo MK-I - Extended Live Time wanted
  135. Transformer Center Taps
  136. PTX temps
  137. Can A valve amplifier be both Class A and Class B?
  138. got a problem with my scope, need some advice
  139. DC coupled cathode follower driving me nuts
  140. Vacuum state gone?
  141. 1634 dual triode
  142. Aikido line amp
  143. Winding an ISO TX with pair of inductors
  144. Quad II Switch Mode PSU
  145. What do do with all of these?
  146. global negative feedback in el84 push pull
  147. Old HP transformer - what is it?
  148. FET Phase inverter to drive valve PA
  149. Core Audio 6BC4 buffer problem
  150. Power Amplifiers & Gain
  151. Power tube maximum current draw from a power supply
  152. Tube Matching in a Power Amp?
  153. SE stereo / PP mono block schematic choices
  154. How to measure output transformer?
  155. Shoddy Packaging
  156. Schematic needed for Manley SnapperŪ from Manley Labs
  157. Resistor, capacitor across output transformer AKAI M-7
  158. eBay&etc cheap tube buffers/preamp .. anything good?
  159. 6N3 Preamp Question
  160. OK guys...be gentle
  161. 6SN7 and DN2540's
  162. 10k and 6k primary windings on OPT. Use for UL?
  163. Settings for PL509, EZ80 tubes on 539c tester
  164. replacing 6LGC with 6550 or KT88
  165. ECC83 input circuitry
  166. Dynaco MK III modifications
  167. SMPS for heaters
  168. Headphone tube-amp with oddball OPT
  169. Neon Lamp Question
  170. Curious old tubes from tandy
  171. 828 Triode Curves?
  172. 813 review
  173. tube circlotron for headphone amplifier
  174. valve headphone pre-amp
  175. Shengyi 6AQ5
  176. Burn in small signal tubes?
  177. 24V powered 6N11 amplifier, 0.25% distortion, pretty good!
  178. SS diode replacements
  179. can you check if everything is ok with el84 schematic please
  180. Advice on this amp schematic please
  181. 8156's
  182. Can't get anything from my new pre-amp
  183. Bottlehead Paramount Question
  184. need help with ac/dc am/fm radio
  185. Peculiar oscillation
  186. ECC83 settings for Taylor 45C
  187. New Jolida 302b amp owner questions
  188. Help with gyrator
  189. Some basic questions...
  190. I have a hard one for you guys
  191. CCS pulsing oscillation problem
  192. tube testers: different gM standards for same tube?
  193. Frank's Pre Still In Vogue?
  194. Home made tube amps
  195. Source for SED "winged C" tubes?
  196. Preamp Help
  197. Push Pull Class A
  198. Multi-Ways Output Transformers
  199. Redplating anomaly?
  200. Just for fun power poll!
  201. BIASING A JADIS ORCHESTRA
  202. Yaqin MC-50L
  203. CJ PV5 Upgrades?
  204. New Member - Magnavox Amps
  205. Double parafeed
  206. 6550 grid characteristic help please
  207. Newbie- Tube Testing RF Amp tube
  208. Urgent:Wrongly order 220V Power supply for 230V enviroment
  209. Mono sub-out from one trafo?
  210. Mu Follower to drive a Push-Pull Amplifier?
  211. The 6934A Triode Tube
  212. Constant current sink for 6SN7
  213. 6V6 high voltage
  214. VTL deluxe 100 monoblk (KT88) need help?
  215. Va,Ia exeed limiting values in datasheeds ?
  216. Old DIYtube ST-35 electrolytics - swap?
  217. What Hammond for UK?
  218. What would you build with this transformer set?
  219. EL86 / 6CW5 + 6BQ7A amp design
  220. Western Electric theater amplifiers; how to hook them up?
  221. 12AU7,12B4A PSE schematic needs finishing!
  222. Dual grid and plate pins
  223. Best sounding ECC83 ?
  224. tube output for Playstation 1
  225. 6GX8 as Audio Level Indicator?
  226. help on 12AU7 Preamp circuit
  227. Anyone bought tubes from http://www.nostubestore.com/ ?
  228. Tube pre-amp with exposed tubes?
  229. Using low voltage lamp in power supply
  230. GU 50 monoblock
  231. KT-88 Push Pull with CFB
  232. 12AX7 + ?? Ideas 2A3 // 6L6
  233. Formula for driver current requirement ?
  234. Need a little help with a regulator circuit if you are willing.
  235. Troubleshooting help for 12AQ5 amp
  236. Can anyone help with an ef86 tape preamp mod please?
  237. Herald Amp
  238. To switch B+ or not?
  239. All-tube vs tube/mosfet hybrid ?
  240. 6c33c-b question
  241. 12AT7 substitutes?
  242. 1st project salvaged sears receiver iron need good amp schematic
  243. FM-3 ? About parts replacement in IF stages
  244. simple EL84 parallel?
  245. Finished: Claus Byrtih EL34 amplifier on Isophon BS35 speaker set
  246. Yet another resistor thread
  247. Bogen CHB100 Valve Question
  248. 1st build; Adding load to PT secondary
  249. need help RCA RS 199C
  250. Unusually high Gm

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