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  1. High Fidelity by Pilot (circa 1953)
  2. Hardware help please
  3. integrated amps 100 per channel
  4. KT88 mounting question
  5. Output Transformer question
  6. Angstrom Thermionic
  7. ECC88 tube buffer NEEDED !
  8. Marshall 8080, missing components
  9. Paralell SE 807 Amp design
  10. Putting together a tweaker friendly amplifier!
  11. Tube chassis
  12. DHT headphone Hybrid-CF+
  13. Looking for specs on this Beyer Xfmr
  14. Resistors for Berning EA-2101?
  15. Uneven Plate Glow
  16. Parafeed transformer sounds thin
  17. Lightbulbs as ccs
  18. My AWESOME First DIY amp
  19. Cary audio design SLI 80
  20. A1538 OPT?
  21. Genalex A2900 Keep or Sell?
  22. 6CB6 Spice Model wanted
  23. XFMR Help?
  24. 12 volt to 300 volt inverter question for tubes
  25. These amps should be verboten!
  26. how to use PCL86 instead of ecl86
  27. PSU for Aikido (4x 12SN7)
  28. SCA35 and AU-70
  29. Analisys of power amp limitations of tube bias range
  30. DIY Phono Preamp ??
  31. NOS 211 RCA or National Union?
  32. Iron Powder + Resin Output Transformer
  33. The Radio Hat Challenge
  34. EU regulations
  35. Transconductance for kt-90 in plain english
  36. Craftsmen RC-2
  37. Valve Amplification Company V100
  38. Parallel feed transformer with SRPP
  39. It's heeeeeere!- Valve Amplifiers 4th Edition
  40. opera consonance phonostage-PM1
  41. Anybody Explain this Preamp shematic?
  42. The high-voltage collection
  43. Input transformer topology question
  44. JE Labs 300Bdx stereo - troubleshooting
  45. battery operated 12/24/48 Volt multiple tube OTL
  46. Bringing up long-stored tube gear
  47. About RH84 three channel?
  48. MCC with Fisher
  49. Directly heated cathodes
  50. Build recommendation
  51. Ortofon KS 591 - informations
  52. Oatley K295-extra space for tubes
  53. A beginner's tube amp to drive a pair of fostex Fe103e
  54. Tame the beast.
  55. KT88 and Hammond Transformer
  56. B+ Drifts down after 2 hours
  57. Power amp sputters on turnoff
  58. Yet another EQP-1A
  59. How to bias 6SL7?
  60. 6CG7/6FQ7 = 6N5P (6Н5П)
  61. #27 mu stage
  62. Compactron Regulated Power Supply
  63. Best sounding voltage amplifier for hybride.
  64. PX25 to 300B pins
  65. de-gassing power tubes???
  66. Heathkit 51-29 output transformers issure
  67. 6AS7 Model
  68. 26H choke good enough for a grid or anode choke?
  69. Russian 6R2P for small amp.
  70. Power transformer primary is open.
  71. Rectifier oddness
  72. First Tube Build, Thoughts?
  73. Output Transformers
  74. Lazy Sunday 6SN7 Preamp
  75. Audio research VT200 Biasing & Schematic
  76. finished my new preamplifier!!
  77. What would be the correct output cap for this OTL Headphone Amp?
  78. Full Bridge Rectifier With Tubes
  79. Looking for data sheet for GE JAN 6146W/7212
  80. Best Valve pre-amp match for ME 550 amp
  81. Fisher 500c
  82. From old Philips tube books , just for tube audio DIY friends !
  83. UFO
  84. Adding a preamp?
  85. XS-225 valve amp circuit.
  86. LS7/CV1660 curves
  87. Differences between 12V6 tube and 12A6 tube?
  88. Please check my schematic
  89. 12W Push pull w/6C4C
  90. Tube Date Code
  91. For new members....
  92. Graphite ring on sweep tubes
  93. 6N6P tube - focus on
  94. Vox Guitar Amp Created a Revolution
  95. Hot tube preamp pedal build
  96. Counterpoint Electronics/Counterpoint Acoustics/Counterpoint Audio
  97. Radford STA100 improvements?
  98. Playmaster unit 2 help needed!
  99. help me build an output transformer
  100. Vintage Magnavox tube amp
  101. Christmas Build, advice needed.
  102. Speaker suggestions for ST-70
  103. Tube markings?
  104. gaumont-kalee
  105. amplifiers audio research D90
  106. 40W Glass A 300B tube schematic needed.
  107. Hum in one channel only
  108. Water cooling Power Tubes
  109. Toroid Output Transformer from Plitron
  110. Scott LK-30 Assembly Manual Needed
  111. HUM STARTS 1 OR 2 HOUR AFTER THE AMP IS ON
  112. The best valve amp!
  113. Equivalents for 12AT7 and 6N11 ? (Sense G3 headphone amp)
  114. More probably stupid questions about feedback
  115. single stage amp?
  116. SS 83 again
  117. Making Spice Models for tubes
  118. Seth mk 2 ???
  119. Colorful inspiration
  120. Testing KT-90's Ei NIs Yugoslavia
  121. El Cheapo Transformer Question
  122. Why does the grid extend so far beyond the anode ?
  123. Valve amplifier identification
  124. E-M-field problem
  125. Effective cathode resistance
  126. Spectrum evaluation ECC82
  127. power d90-b
  128. el34, kt88, kt90, 6550 to 8417 conversion
  129. Do you know these capacitors?
  130. Vintage Capacitor Identification??
  131. GRAAF GAAFiti WFB ONE - Schematic needed
  132. Oscillation WE417A
  133. EL84 fixed fixed bias
  134. Blown stereo
  135. 807/6au6 pure pentode mode amplifier
  136. help with ID'ing a tube
  137. Magnavox 50EH5 Stereo Amp
  138. My new Circlotron OTL tube power Amp.
  139. ideas for a tube eating guitair amp
  140. 6DE4, unused pins
  141. 300B what output transformer Sowter or Lundahl?
  142. 6DJ8 preamp w/balanced input - strange schematic
  143. Screen Grid Regulation Requirements
  144. Advice needed on new 6L6 ro 6V6 SE or SET build
  145. need a little help with an HK solo2 tube receiver
  146. Help me to build Vacuum Tube Amp.
  147. amp with SRPP output stage? post if you know one
  148. Output transformer question
  149. EF86 Phono pre-amp or Mcintosh MC2200?
  150. Transcendar is Branching Out
  151. can SE driven PP be clean enough to sound SE ?
  152. k12-m amp not working
  153. 813 amp and old choke
  154. Several hundred tubes found! What to do!
  155. Possible to convert Audiorom Fu29 to Single end?
  156. Measuring bias
  157. ecc802s SRPP preamplifier
  158. HELP! Capacitor specs for Sonic Frontiers SFC-1 Control Amplifier
  159. Class A KT88 info
  160. What is screen tap of transformer?
  161. Brightest heaters in tubes?
  162. 40% tap or not
  163. 6dj8 phono schematic needed
  164. EL34 Parts..
  165. solid state driven p-p ultralinear
  166. linestage w/separate PSU: where to "split" ?
  167. Anybody know this TELEFUNKEN SE transformer?
  168. Too much feedback?
  169. Tube Power Supply Dummy Load
  170. For 6c33 Fans. A new schematic
  171. WAD phono 3 motorboating with Raphaelite 300b
  172. Help! Tube Tester in Austin or Lago Vista?
  173. Vintage Stromberg Carlson
  174. GM70 and Other LTSpice Tube Models
  175. Please help me understand this feedback
  176. Affordable Valve Company - Re-bias
  177. The effect of different value coupling capacitors?
  178. Closed loop stability help needed.
  179. EAR 509 OPT Impedances
  180. Installing Hammond 1609s in K12-G
  181. 6088 Amplifier
  182. Valve Art kt88 not the same ring getter?
  183. 5mA DC transformer - tube output stage?
  184. Mini amp questions
  185. What mean those russian electronic units ?
  186. Coupling capacitors
  187. Monsters thread (high power tube amps)
  188. CCS on LTP please help
  189. Best type of pre-amp for valve/tube power amp
  190. 12au7 made by Toshiba, Hitachi, Matsushita, RSD, International and Miniwatt?
  191. Load lines
  192. Cold cathode tubes
  193. Redundant CNC stainless steel enclosures
  194. First try P-P 6S41S design
  195. Help!!! I need to get valve TAW12/20B / TRIODE for use as HF amplifier and oscillator
  196. Velleman K4040 Stereo Vacuum Tube Amplifier Volume Control
  197. 12AT7 Regulated Power Supply
  198. 2A3 to 45 Cathode Wattage?
  199. Cheap Chinese Ebay Amps
  200. Audion Sterling Integrated Amp Version - Stereo MK-I - Extended Live Time wanted
  201. Transformer Center Taps
  202. Output transformer for 18watt
  203. PTX temps
  204. Can A valve amplifier be both Class A and Class B?
  205. got a problem with my scope, need some advice
  206. DC coupled cathode follower driving me nuts
  207. Vacuum state gone?
  208. 1634 dual triode
  209. Aikido line amp
  210. Winding an ISO TX with pair of inductors
  211. Quad II Switch Mode PSU
  212. What do do with all of these?
  213. global negative feedback in el84 push pull
  214. Old HP transformer - what is it?
  215. FET Phase inverter to drive valve PA
  216. Core Audio 6BC4 buffer problem
  217. JCM Build - Voltage problem!
  218. Power Amplifiers & Gain
  219. Power tube maximum current draw from a power supply
  220. Tube Matching in a Power Amp?
  221. SE stereo / PP mono block schematic choices
  222. How to measure output transformer?
  223. Peavey VTM 60 vs Orange Tiny Terror
  224. Shoddy Packaging
  225. Schematic needed for Manley SnapperŪ from Manley Labs
  226. Resistor, capacitor across output transformer AKAI M-7
  227. eBay&etc cheap tube buffers/preamp .. anything good?
  228. 6N3 Preamp Question
  229. OK guys...be gentle
  230. 6SN7 and DN2540's
  231. 10k and 6k primary windings on OPT. Use for UL?
  232. Settings for PL509, EZ80 tubes on 539c tester
  233. replacing 6LGC with 6550 or KT88
  234. ECC83 input circuitry
  235. Dynaco MK III modifications
  236. SMPS for heaters
  237. Headphone tube-amp with oddball OPT
  238. Neon Lamp Question
  239. Curious old tubes from tandy
  240. 828 Triode Curves?
  241. 813 review
  242. tube circlotron for headphone amplifier
  243. valve headphone pre-amp
  244. Shengyi 6AQ5
  245. Burn in small signal tubes?
  246. 24V powered 6N11 amplifier, 0.25% distortion, pretty good!
  247. SS diode replacements
  248. Bass guitar amp using 832a/GU32 tubes
  249. can you check if everything is ok with el84 schematic please
  250. Advice on this amp schematic please

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