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  1. KT88 and Hammond Transformer
  2. B+ Drifts down after 2 hours
  3. Power amp sputters on turnoff
  4. Yet another EQP-1A
  5. How to bias 6SL7?
  6. 6CG7/6FQ7 = 6N5P (6Н5П)
  7. #27 mu stage
  8. Compactron Regulated Power Supply
  9. Best sounding voltage amplifier for hybride.
  10. PX25 to 300B pins
  11. de-gassing power tubes???
  12. Heathkit 51-29 output transformers issure
  13. 6AS7 Model
  14. 26H choke good enough for a grid or anode choke?
  15. Russian 6R2P for small amp.
  16. Power transformer primary is open.
  17. Rectifier oddness
  18. First Tube Build, Thoughts?
  19. Output Transformers
  20. Lazy Sunday 6SN7 Preamp
  21. Audio research VT200 Biasing & Schematic
  22. finished my new preamplifier!!
  23. What would be the correct output cap for this OTL Headphone Amp?
  24. Full Bridge Rectifier With Tubes
  25. Looking for data sheet for GE JAN 6146W/7212
  26. Best Valve pre-amp match for ME 550 amp
  27. Fisher 500c
  28. From old Philips tube books , just for tube audio DIY friends !
  29. UFO
  30. Adding a preamp?
  31. XS-225 valve amp circuit.
  32. LS7/CV1660 curves
  33. Differences between 12V6 tube and 12A6 tube?
  34. Please check my schematic
  35. 12W Push pull w/6C4C
  36. Tube Date Code
  37. For new members....
  38. Graphite ring on sweep tubes
  39. 6N6P tube - focus on
  40. Hot tube preamp pedal build
  41. Counterpoint Electronics/Counterpoint Acoustics/Counterpoint Audio
  42. Radford STA100 improvements?
  43. Playmaster unit 2 help needed!
  44. help me build an output transformer
  45. Vintage Magnavox tube amp
  46. Christmas Build, advice needed.
  47. Speaker suggestions for ST-70
  48. Tube markings?
  49. gaumont-kalee
  50. amplifiers audio research D90
  51. 40W Glass A 300B tube schematic needed.
  52. Hum in one channel only
  53. Water cooling Power Tubes
  54. Toroid Output Transformer from Plitron
  55. Scott LK-30 Assembly Manual Needed
  56. HUM STARTS 1 OR 2 HOUR AFTER THE AMP IS ON
  57. The best valve amp!
  58. Equivalents for 12AT7 and 6N11 ? (Sense G3 headphone amp)
  59. More probably stupid questions about feedback
  60. single stage amp?
  61. SS 83 again
  62. Making Spice Models for tubes
  63. Seth mk 2 ???
  64. Colorful inspiration
  65. Testing KT-90's Ei NIs Yugoslavia
  66. El Cheapo Transformer Question
  67. Why does the grid extend so far beyond the anode ?
  68. Valve amplifier identification
  69. E-M-field problem
  70. Effective cathode resistance
  71. Spectrum evaluation ECC82
  72. power d90-b
  73. el34, kt88, kt90, 6550 to 8417 conversion
  74. Do you know these capacitors?
  75. GRAAF GAAFiti WFB ONE - Schematic needed
  76. Oscillation WE417A
  77. EL84 fixed fixed bias
  78. Blown stereo
  79. 807/6au6 pure pentode mode amplifier
  80. help with ID'ing a tube
  81. Magnavox 50EH5 Stereo Amp
  82. My new Circlotron OTL tube power Amp.
  83. ideas for a tube eating guitair amp
  84. 6DE4, unused pins
  85. 300B what output transformer Sowter or Lundahl?
  86. 6DJ8 preamp w/balanced input - strange schematic
  87. Screen Grid Regulation Requirements
  88. Advice needed on new 6L6 ro 6V6 SE or SET build
  89. need a little help with an HK solo2 tube receiver
  90. Help me to build Vacuum Tube Amp.
  91. amp with SRPP output stage? post if you know one
  92. Output transformer question
  93. EF86 Phono pre-amp or Mcintosh MC2200?
  94. Transcendar is Branching Out
  95. can SE driven PP be clean enough to sound SE ?
  96. k12-m amp not working
  97. 813 amp and old choke
  98. Several hundred tubes found! What to do!
  99. Possible to convert Audiorom Fu29 to Single end?
  100. Measuring bias
  101. ecc802s SRPP preamplifier
  102. HELP! Capacitor specs for Sonic Frontiers SFC-1 Control Amplifier
  103. Class A KT88 info
  104. What is screen tap of transformer?
  105. Brightest heaters in tubes?
  106. 40% tap or not
  107. 6dj8 phono schematic needed
  108. EL34 Parts..
  109. solid state driven p-p ultralinear
  110. linestage w/separate PSU: where to "split" ?
  111. Anybody know this TELEFUNKEN SE transformer?
  112. Too much feedback?
  113. Tube Power Supply Dummy Load
  114. For 6c33 Fans. A new schematic
  115. WAD phono 3 motorboating with Raphaelite 300b
  116. Help! Tube Tester in Austin or Lago Vista?
  117. Vintage Stromberg Carlson
  118. GM70 and Other LTSpice Tube Models
  119. Please help me understand this feedback
  120. Affordable Valve Company - Re-bias
  121. The effect of different value coupling capacitors?
  122. Closed loop stability help needed.
  123. EAR 509 OPT Impedances
  124. Installing Hammond 1609s in K12-G
  125. 6088 Amplifier
  126. Valve Art kt88 not the same ring getter?
  127. 5mA DC transformer - tube output stage?
  128. Mini amp questions
  129. What mean those russian electronic units ?
  130. Coupling capacitors
  131. Monsters thread (high power tube amps)
  132. CCS on LTP please help
  133. Best type of pre-amp for valve/tube power amp
  134. 12au7 made by Toshiba, Hitachi, Matsushita, RSD, International and Miniwatt?
  135. Load lines
  136. Cold cathode tubes
  137. Redundant CNC stainless steel enclosures
  138. First try P-P 6S41S design
  139. Help!!! I need to get valve TAW12/20B / TRIODE for use as HF amplifier and oscillator
  140. Velleman K4040 Stereo Vacuum Tube Amplifier Volume Control
  141. 12AT7 Regulated Power Supply
  142. 2A3 to 45 Cathode Wattage?
  143. Cheap Chinese Ebay Amps
  144. Audion Sterling Integrated Amp Version - Stereo MK-I - Extended Live Time wanted
  145. Transformer Center Taps
  146. PTX temps
  147. Can A valve amplifier be both Class A and Class B?
  148. got a problem with my scope, need some advice
  149. DC coupled cathode follower driving me nuts
  150. Vacuum state gone?
  151. 1634 dual triode
  152. Aikido line amp
  153. Winding an ISO TX with pair of inductors
  154. Quad II Switch Mode PSU
  155. What do do with all of these?
  156. global negative feedback in el84 push pull
  157. Old HP transformer - what is it?
  158. FET Phase inverter to drive valve PA
  159. Core Audio 6BC4 buffer problem
  160. Power Amplifiers & Gain
  161. Power tube maximum current draw from a power supply
  162. Tube Matching in a Power Amp?
  163. SE stereo / PP mono block schematic choices
  164. How to measure output transformer?
  165. Shoddy Packaging
  166. Schematic needed for Manley SnapperŪ from Manley Labs
  167. Resistor, capacitor across output transformer AKAI M-7
  168. eBay&etc cheap tube buffers/preamp .. anything good?
  169. 6N3 Preamp Question
  170. OK guys...be gentle
  171. 6SN7 and DN2540's
  172. 10k and 6k primary windings on OPT. Use for UL?
  173. Settings for PL509, EZ80 tubes on 539c tester
  174. replacing 6LGC with 6550 or KT88
  175. ECC83 input circuitry
  176. Dynaco MK III modifications
  177. SMPS for heaters
  178. Headphone tube-amp with oddball OPT
  179. Neon Lamp Question
  180. Curious old tubes from tandy
  181. 828 Triode Curves?
  182. 813 review
  183. tube circlotron for headphone amplifier
  184. valve headphone pre-amp
  185. Shengyi 6AQ5
  186. Burn in small signal tubes?
  187. 24V powered 6N11 amplifier, 0.25% distortion, pretty good!
  188. SS diode replacements
  189. can you check if everything is ok with el84 schematic please
  190. Advice on this amp schematic please
  191. 8156's
  192. Can't get anything from my new pre-amp
  193. Bottlehead Paramount Question
  194. need help with ac/dc am/fm radio
  195. Peculiar oscillation
  196. ECC83 settings for Taylor 45C
  197. New Jolida 302b amp owner questions
  198. Help with gyrator
  199. Some basic questions...
  200. I have a hard one for you guys
  201. CCS pulsing oscillation problem
  202. tube testers: different gM standards for same tube?
  203. Frank's Pre Still In Vogue?
  204. Home made tube amps
  205. Source for SED "winged C" tubes?
  206. Preamp Help
  207. Push Pull Class A
  208. Multi-Ways Output Transformers
  209. Redplating anomaly?
  210. Just for fun power poll!
  211. BIASING A JADIS ORCHESTRA
  212. Yaqin MC-50L
  213. CJ PV5 Upgrades?
  214. New Member - Magnavox Amps
  215. Double parafeed
  216. 6550 grid characteristic help please
  217. Newbie- Tube Testing RF Amp tube
  218. Urgent:Wrongly order 220V Power supply for 230V enviroment
  219. Mono sub-out from one trafo?
  220. Mu Follower to drive a Push-Pull Amplifier?
  221. The 6934A Triode Tube
  222. Constant current sink for 6SN7
  223. 6V6 high voltage
  224. VTL deluxe 100 monoblk (KT88) need help?
  225. Va,Ia exeed limiting values in datasheeds ?
  226. Old DIYtube ST-35 electrolytics - swap?
  227. What Hammond for UK?
  228. What would you build with this transformer set?
  229. EL86 / 6CW5 + 6BQ7A amp design
  230. Western Electric theater amplifiers; how to hook them up?
  231. 12AU7,12B4A PSE schematic needs finishing!
  232. Dual grid and plate pins
  233. Best sounding ECC83 ?
  234. tube output for Playstation 1
  235. 6GX8 as Audio Level Indicator?
  236. help on 12AU7 Preamp circuit
  237. Anyone bought tubes from http://www.nostubestore.com/ ?
  238. Tube pre-amp with exposed tubes?
  239. Using low voltage lamp in power supply
  240. GU 50 monoblock
  241. KT-88 Push Pull with CFB
  242. 12AX7 + ?? Ideas 2A3 // 6L6
  243. Formula for driver current requirement ?
  244. Need a little help with a regulator circuit if you are willing.
  245. Troubleshooting help for 12AQ5 amp
  246. Can anyone help with an ef86 tape preamp mod please?
  247. Herald Amp
  248. To switch B+ or not?
  249. All-tube vs tube/mosfet hybrid ?
  250. 6c33c-b question

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