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  1. Analisys of power amp limitations of tube bias range
  2. DIY Phono Preamp ??
  3. NOS 211 RCA or National Union?
  4. Iron Powder + Resin Output Transformer
  5. The Radio Hat Challenge
  6. EU regulations
  7. Transconductance for kt-90 in plain english
  8. Craftsmen RC-2
  9. Valve Amplification Company V100
  10. Parallel feed transformer with SRPP
  11. It's heeeeeere!- Valve Amplifiers 4th Edition
  12. opera consonance phonostage-PM1
  13. Anybody Explain this Preamp shematic?
  14. The high-voltage collection
  15. Input transformer topology question
  16. JE Labs 300Bdx stereo - troubleshooting
  17. battery operated 12/24/48 Volt multiple tube OTL
  18. Bringing up long-stored tube gear
  19. About RH84 three channel?
  20. MCC with Fisher
  21. Directly heated cathodes
  22. Build recommendation
  23. Ortofon KS 591 - informations
  24. Oatley K295-extra space for tubes
  25. A beginner's tube amp to drive a pair of fostex Fe103e
  26. Tame the beast.
  27. KT88 and Hammond Transformer
  28. B+ Drifts down after 2 hours
  29. Power amp sputters on turnoff
  30. Yet another EQP-1A
  31. How to bias 6SL7?
  32. 6CG7/6FQ7 = 6N5P (6Н5П)
  33. #27 mu stage
  34. Compactron Regulated Power Supply
  35. Best sounding voltage amplifier for hybride.
  36. PX25 to 300B pins
  37. de-gassing power tubes???
  38. Heathkit 51-29 output transformers issure
  39. 6AS7 Model
  40. 26H choke good enough for a grid or anode choke?
  41. Russian 6R2P for small amp.
  42. Power transformer primary is open.
  43. Rectifier oddness
  44. First Tube Build, Thoughts?
  45. Output Transformers
  46. Lazy Sunday 6SN7 Preamp
  47. Audio research VT200 Biasing & Schematic
  48. finished my new preamplifier!!
  49. What would be the correct output cap for this OTL Headphone Amp?
  50. Full Bridge Rectifier With Tubes
  51. Looking for data sheet for GE JAN 6146W/7212
  52. Best Valve pre-amp match for ME 550 amp
  53. Fisher 500c
  54. From old Philips tube books , just for tube audio DIY friends !
  55. UFO
  56. Adding a preamp?
  57. XS-225 valve amp circuit.
  58. LS7/CV1660 curves
  59. Differences between 12V6 tube and 12A6 tube?
  60. Please check my schematic
  61. 12W Push pull w/6C4C
  62. Tube Date Code
  63. For new members....
  64. Graphite ring on sweep tubes
  65. 6N6P tube - focus on
  66. Vox Guitar Amp Created a Revolution
  67. Hot tube preamp pedal build
  68. Counterpoint Electronics/Counterpoint Acoustics/Counterpoint Audio
  69. Radford STA100 improvements?
  70. Playmaster unit 2 help needed!
  71. help me build an output transformer
  72. Vintage Magnavox tube amp
  73. Christmas Build, advice needed.
  74. Speaker suggestions for ST-70
  75. Tube markings?
  76. gaumont-kalee
  77. amplifiers audio research D90
  78. 40W Glass A 300B tube schematic needed.
  79. Hum in one channel only
  80. Water cooling Power Tubes
  81. Toroid Output Transformer from Plitron
  82. Scott LK-30 Assembly Manual Needed
  83. HUM STARTS 1 OR 2 HOUR AFTER THE AMP IS ON
  84. The best valve amp!
  85. Equivalents for 12AT7 and 6N11 ? (Sense G3 headphone amp)
  86. More probably stupid questions about feedback
  87. single stage amp?
  88. SS 83 again
  89. Making Spice Models for tubes
  90. Seth mk 2 ???
  91. Colorful inspiration
  92. Testing KT-90's Ei NIs Yugoslavia
  93. El Cheapo Transformer Question
  94. Why does the grid extend so far beyond the anode ?
  95. Valve amplifier identification
  96. E-M-field problem
  97. Effective cathode resistance
  98. Spectrum evaluation ECC82
  99. power d90-b
  100. el34, kt88, kt90, 6550 to 8417 conversion
  101. Do you know these capacitors?
  102. Vintage Capacitor Identification??
  103. GRAAF GAAFiti WFB ONE - Schematic needed
  104. Oscillation WE417A
  105. EL84 fixed fixed bias
  106. Blown stereo
  107. 807/6au6 pure pentode mode amplifier
  108. help with ID'ing a tube
  109. Magnavox 50EH5 Stereo Amp
  110. My new Circlotron OTL tube power Amp.
  111. ideas for a tube eating guitair amp
  112. 6DE4, unused pins
  113. 300B what output transformer Sowter or Lundahl?
  114. 6DJ8 preamp w/balanced input - strange schematic
  115. Screen Grid Regulation Requirements
  116. Advice needed on new 6L6 ro 6V6 SE or SET build
  117. need a little help with an HK solo2 tube receiver
  118. Help me to build Vacuum Tube Amp.
  119. amp with SRPP output stage? post if you know one
  120. Output transformer question
  121. EF86 Phono pre-amp or Mcintosh MC2200?
  122. Transcendar is Branching Out
  123. can SE driven PP be clean enough to sound SE ?
  124. k12-m amp not working
  125. 813 amp and old choke
  126. Several hundred tubes found! What to do!
  127. Possible to convert Audiorom Fu29 to Single end?
  128. Measuring bias
  129. ecc802s SRPP preamplifier
  130. HELP! Capacitor specs for Sonic Frontiers SFC-1 Control Amplifier
  131. Class A KT88 info
  132. What is screen tap of transformer?
  133. Brightest heaters in tubes?
  134. 40% tap or not
  135. 6dj8 phono schematic needed
  136. EL34 Parts..
  137. solid state driven p-p ultralinear
  138. linestage w/separate PSU: where to "split" ?
  139. Anybody know this TELEFUNKEN SE transformer?
  140. Too much feedback?
  141. Tube Power Supply Dummy Load
  142. For 6c33 Fans. A new schematic
  143. WAD phono 3 motorboating with Raphaelite 300b
  144. Help! Tube Tester in Austin or Lago Vista?
  145. Vintage Stromberg Carlson
  146. GM70 and Other LTSpice Tube Models
  147. Please help me understand this feedback
  148. Affordable Valve Company - Re-bias
  149. The effect of different value coupling capacitors?
  150. Closed loop stability help needed.
  151. EAR 509 OPT Impedances
  152. Installing Hammond 1609s in K12-G
  153. 6088 Amplifier
  154. Valve Art kt88 not the same ring getter?
  155. 5mA DC transformer - tube output stage?
  156. Mini amp questions
  157. What mean those russian electronic units ?
  158. Coupling capacitors
  159. Monsters thread (high power tube amps)
  160. CCS on LTP please help
  161. Best type of pre-amp for valve/tube power amp
  162. 12au7 made by Toshiba, Hitachi, Matsushita, RSD, International and Miniwatt?
  163. Load lines
  164. Cold cathode tubes
  165. Redundant CNC stainless steel enclosures
  166. First try P-P 6S41S design
  167. Help!!! I need to get valve TAW12/20B / TRIODE for use as HF amplifier and oscillator
  168. Velleman K4040 Stereo Vacuum Tube Amplifier Volume Control
  169. 12AT7 Regulated Power Supply
  170. 2A3 to 45 Cathode Wattage?
  171. Cheap Chinese Ebay Amps
  172. Audion Sterling Integrated Amp Version - Stereo MK-I - Extended Live Time wanted
  173. Transformer Center Taps
  174. Output transformer for 18watt
  175. PTX temps
  176. Can A valve amplifier be both Class A and Class B?
  177. got a problem with my scope, need some advice
  178. DC coupled cathode follower driving me nuts
  179. Vacuum state gone?
  180. 1634 dual triode
  181. Aikido line amp
  182. Winding an ISO TX with pair of inductors
  183. Quad II Switch Mode PSU
  184. What do do with all of these?
  185. global negative feedback in el84 push pull
  186. Old HP transformer - what is it?
  187. FET Phase inverter to drive valve PA
  188. Core Audio 6BC4 buffer problem
  189. JCM Build - Voltage problem!
  190. Power Amplifiers & Gain
  191. Power tube maximum current draw from a power supply
  192. Tube Matching in a Power Amp?
  193. SE stereo / PP mono block schematic choices
  194. How to measure output transformer?
  195. Peavey VTM 60 vs Orange Tiny Terror
  196. Shoddy Packaging
  197. Schematic needed for Manley SnapperŪ from Manley Labs
  198. Resistor, capacitor across output transformer AKAI M-7
  199. eBay&etc cheap tube buffers/preamp .. anything good?
  200. 6N3 Preamp Question
  201. OK guys...be gentle
  202. 6SN7 and DN2540's
  203. 10k and 6k primary windings on OPT. Use for UL?
  204. Settings for PL509, EZ80 tubes on 539c tester
  205. replacing 6LGC with 6550 or KT88
  206. ECC83 input circuitry
  207. Dynaco MK III modifications
  208. SMPS for heaters
  209. Headphone tube-amp with oddball OPT
  210. Neon Lamp Question
  211. Curious old tubes from tandy
  212. 828 Triode Curves?
  213. 813 review
  214. tube circlotron for headphone amplifier
  215. valve headphone pre-amp
  216. Shengyi 6AQ5
  217. Burn in small signal tubes?
  218. 24V powered 6N11 amplifier, 0.25% distortion, pretty good!
  219. SS diode replacements
  220. Bass guitar amp using 832a/GU32 tubes
  221. can you check if everything is ok with el84 schematic please
  222. Advice on this amp schematic please
  223. 8156's
  224. Can't get anything from my new pre-amp
  225. Bottlehead Paramount Question
  226. need help with ac/dc am/fm radio
  227. Peculiar oscillation
  228. ECC83 settings for Taylor 45C
  229. New Jolida 302b amp owner questions
  230. Help with gyrator
  231. Some basic questions...
  232. I have a hard one for you guys
  233. CCS pulsing oscillation problem
  234. tube testers: different gM standards for same tube?
  235. Frank's Pre Still In Vogue?
  236. Home made tube amps
  237. Source for SED "winged C" tubes?
  238. Preamp Help
  239. Push Pull Class A
  240. Multi-Ways Output Transformers
  241. Redplating anomaly?
  242. Marshall JCM900 2500 preamp
  243. Just for fun power poll!
  244. BIASING A JADIS ORCHESTRA
  245. Yaqin MC-50L
  246. CJ PV5 Upgrades?
  247. New Member - Magnavox Amps
  248. Double parafeed
  249. 6550 grid characteristic help please
  250. Newbie- Tube Testing RF Amp tube

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