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  1. First design GU81M SE triode
  2. Instruments & Amps forum - where is it?
  3. Power supply capacitor question for tubelab simple ss
  4. EL300 = 6FN5 / PL300 = 35FN5 tube
  5. 6U8 driving 45
  6. very low impedance white follower with 6H13C
  7. EL86 Any idea helps.
  8. 6112 and 6111 Mini-preamp
  9. Expert advice on what preamp to chose
  10. Harman Kardon DPR-7, Commander series pre/mixer
  11. input transformer - mumetal casing etc.
  12. Oil-filled caps: ASC versus Panasonic
  13. SOHA headphone amp
  14. Using a single triode as a .......
  15. Sonic Frontiers SFP-1 Phono Stage
  16. Help!! with attenuation.
  17. power up inrush current limiter - anyone using?
  18. Audioromy FU-29, Latest Model 828A Mini Review
  19. Vertical-deflection
  20. Drilling a hole
  21. Edcor CXPP25-MS-8K V Triode Z-565
  22. bad opt measured values
  23. Mu Follower Driver for Push-Pull
  24. Hickok 539 question...
  25. need datasheets for a phillips transformer if anyone has any
  26. Chicago power XFMR question.
  27. Coupling Capacitor - Pls Help
  28. Help please on Christmas gift
  29. Audio Note P-zero
  30. SE EL34 Schematic - What do you think?
  31. Playing with hybrid amp: SRPP + MOSFET
  32. 300B filament supply question
  33. KT88 Parallel Push Pull
  34. cheating life out of old tubes?
  35. dBu transformer ratings
  36. Dared MP-2a3c mods
  37. Output transformers (Wolpert)
  38. Using Mains Transformers as Outputs
  39. Tube just for show...
  40. first project - first post - poddwatt
  41. High power CCS
  42. Analog Summing
  43. My new el34 + 12ax7 VCT amp. (Need Ideas For my first headphone vacuum tube amp Too~)
  44. cascode tubes
  45. High Fidelity by Pilot (circa 1953)
  46. Hardware help please
  47. integrated amps 100 per channel
  48. KT88 mounting question
  49. Output Transformer question
  50. Angstrom Thermionic
  51. ECC88 tube buffer NEEDED !
  52. Marshall 8080, missing components
  53. Paralell SE 807 Amp design
  54. Putting together a tweaker friendly amplifier!
  55. Tube chassis
  56. DHT headphone Hybrid-CF+
  57. Looking for specs on this Beyer Xfmr
  58. Resistors for Berning EA-2101?
  59. Uneven Plate Glow
  60. Parafeed transformer sounds thin
  61. Lightbulbs as ccs
  62. My AWESOME First DIY amp
  63. Cary audio design SLI 80
  64. A1538 OPT?
  65. Genalex A2900 Keep or Sell?
  66. 6CB6 Spice Model wanted
  67. XFMR Help?
  68. 12 volt to 300 volt inverter question for tubes
  69. These amps should be verboten!
  70. how to use PCL86 instead of ecl86
  71. PSU for Aikido (4x 12SN7)
  72. SCA35 and AU-70
  73. Analisys of power amp limitations of tube bias range
  74. DIY Phono Preamp ??
  75. NOS 211 RCA or National Union?
  76. Iron Powder + Resin Output Transformer
  77. The Radio Hat Challenge
  78. EU regulations
  79. Transconductance for kt-90 in plain english
  80. Craftsmen RC-2
  81. Valve Amplification Company V100
  82. Parallel feed transformer with SRPP
  83. It's heeeeeere!- Valve Amplifiers 4th Edition
  84. opera consonance phonostage-PM1
  85. Anybody Explain this Preamp shematic?
  86. The high-voltage collection
  87. Input transformer topology question
  88. JE Labs 300Bdx stereo - troubleshooting
  89. battery operated 12/24/48 Volt multiple tube OTL
  90. Bringing up long-stored tube gear
  91. About RH84 three channel?
  92. MCC with Fisher
  93. Directly heated cathodes
  94. Build recommendation
  95. Ortofon KS 591 - informations
  96. Oatley K295-extra space for tubes
  97. A beginner's tube amp to drive a pair of fostex Fe103e
  98. Tame the beast.
  99. KT88 and Hammond Transformer
  100. B+ Drifts down after 2 hours
  101. Power amp sputters on turnoff
  102. Yet another EQP-1A
  103. How to bias 6SL7?
  104. 6CG7/6FQ7 = 6N5P (6Н5П)
  105. #27 mu stage
  106. Compactron Regulated Power Supply
  107. Best sounding voltage amplifier for hybride.
  108. PX25 to 300B pins
  109. de-gassing power tubes???
  110. Heathkit 51-29 output transformers issure
  111. 6AS7 Model
  112. 26H choke good enough for a grid or anode choke?
  113. Russian 6R2P for small amp.
  114. Power transformer primary is open.
  115. Rectifier oddness
  116. First Tube Build, Thoughts?
  117. Output Transformers
  118. Lazy Sunday 6SN7 Preamp
  119. Audio research VT200 Biasing & Schematic
  120. finished my new preamplifier!!
  121. What would be the correct output cap for this OTL Headphone Amp?
  122. Full Bridge Rectifier With Tubes
  123. Looking for data sheet for GE JAN 6146W/7212
  124. Best Valve pre-amp match for ME 550 amp
  125. Fisher 500c
  126. From old Philips tube books , just for tube audio DIY friends !
  127. UFO
  128. Adding a preamp?
  129. XS-225 valve amp circuit.
  130. LS7/CV1660 curves
  131. Differences between 12V6 tube and 12A6 tube?
  132. Please check my schematic
  133. 12W Push pull w/6C4C
  134. Tube Date Code
  135. For new members....
  136. Graphite ring on sweep tubes
  137. 6N6P tube - focus on
  138. Vox Guitar Amp Created a Revolution
  139. Hot tube preamp pedal build
  140. Counterpoint Electronics/Counterpoint Acoustics/Counterpoint Audio
  141. Radford STA100 improvements?
  142. Playmaster unit 2 help needed!
  143. help me build an output transformer
  144. Vintage Magnavox tube amp
  145. Christmas Build, advice needed.
  146. Speaker suggestions for ST-70
  147. Tube markings?
  148. gaumont-kalee
  149. amplifiers audio research D90
  150. 40W Glass A 300B tube schematic needed.
  151. Hum in one channel only
  152. Water cooling Power Tubes
  153. Toroid Output Transformer from Plitron
  154. Scott LK-30 Assembly Manual Needed
  155. HUM STARTS 1 OR 2 HOUR AFTER THE AMP IS ON
  156. The best valve amp!
  157. Equivalents for 12AT7 and 6N11 ? (Sense G3 headphone amp)
  158. More probably stupid questions about feedback
  159. single stage amp?
  160. SS 83 again
  161. Making Spice Models for tubes
  162. Seth mk 2 ???
  163. Colorful inspiration
  164. Testing KT-90's Ei NIs Yugoslavia
  165. El Cheapo Transformer Question
  166. Why does the grid extend so far beyond the anode ?
  167. Valve amplifier identification
  168. E-M-field problem
  169. Effective cathode resistance
  170. Spectrum evaluation ECC82
  171. power d90-b
  172. el34, kt88, kt90, 6550 to 8417 conversion
  173. Do you know these capacitors?
  174. Vintage Capacitor Identification??
  175. GRAAF GAAFiti WFB ONE - Schematic needed
  176. Oscillation WE417A
  177. EL84 fixed fixed bias
  178. Blown stereo
  179. 807/6au6 pure pentode mode amplifier
  180. help with ID'ing a tube
  181. Magnavox 50EH5 Stereo Amp
  182. My new Circlotron OTL tube power Amp.
  183. ideas for a tube eating guitair amp
  184. 6DE4, unused pins
  185. 300B what output transformer Sowter or Lundahl?
  186. 6DJ8 preamp w/balanced input - strange schematic
  187. Screen Grid Regulation Requirements
  188. Advice needed on new 6L6 ro 6V6 SE or SET build
  189. need a little help with an HK solo2 tube receiver
  190. Help me to build Vacuum Tube Amp.
  191. amp with SRPP output stage? post if you know one
  192. Output transformer question
  193. EF86 Phono pre-amp or Mcintosh MC2200?
  194. Transcendar is Branching Out
  195. can SE driven PP be clean enough to sound SE ?
  196. k12-m amp not working
  197. 813 amp and old choke
  198. Several hundred tubes found! What to do!
  199. Possible to convert Audiorom Fu29 to Single end?
  200. Measuring bias
  201. ecc802s SRPP preamplifier
  202. HELP! Capacitor specs for Sonic Frontiers SFC-1 Control Amplifier
  203. Class A KT88 info
  204. What is screen tap of transformer?
  205. Brightest heaters in tubes?
  206. 40% tap or not
  207. 6dj8 phono schematic needed
  208. EL34 Parts..
  209. solid state driven p-p ultralinear
  210. linestage w/separate PSU: where to "split" ?
  211. Anybody know this TELEFUNKEN SE transformer?
  212. Too much feedback?
  213. Tube Power Supply Dummy Load
  214. For 6c33 Fans. A new schematic
  215. WAD phono 3 motorboating with Raphaelite 300b
  216. Help! Tube Tester in Austin or Lago Vista?
  217. Vintage Stromberg Carlson
  218. GM70 and Other LTSpice Tube Models
  219. Please help me understand this feedback
  220. Affordable Valve Company - Re-bias
  221. The effect of different value coupling capacitors?
  222. Closed loop stability help needed.
  223. EAR 509 OPT Impedances
  224. Installing Hammond 1609s in K12-G
  225. 6088 Amplifier
  226. Valve Art kt88 not the same ring getter?
  227. 5mA DC transformer - tube output stage?
  228. Mini amp questions
  229. What mean those russian electronic units ?
  230. Coupling capacitors
  231. Monsters thread (high power tube amps)
  232. CCS on LTP please help
  233. Best type of pre-amp for valve/tube power amp
  234. 12au7 made by Toshiba, Hitachi, Matsushita, RSD, International and Miniwatt?
  235. Load lines
  236. Cold cathode tubes
  237. Redundant CNC stainless steel enclosures
  238. First try P-P 6S41S design
  239. Help!!! I need to get valve TAW12/20B / TRIODE for use as HF amplifier and oscillator
  240. Velleman K4040 Stereo Vacuum Tube Amplifier Volume Control
  241. 12AT7 Regulated Power Supply
  242. 2A3 to 45 Cathode Wattage?
  243. Cheap Chinese Ebay Amps
  244. Audion Sterling Integrated Amp Version - Stereo MK-I - Extended Live Time wanted
  245. Transformer Center Taps
  246. Output transformer for 18watt
  247. PTX temps
  248. Can A valve amplifier be both Class A and Class B?
  249. got a problem with my scope, need some advice
  250. DC coupled cathode follower driving me nuts

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