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  1. Aikido line amp
  2. Winding an ISO TX with pair of inductors
  3. Quad II Switch Mode PSU
  4. What do do with all of these?
  5. global negative feedback in el84 push pull
  6. Old HP transformer - what is it?
  7. FET Phase inverter to drive valve PA
  8. Core Audio 6BC4 buffer problem
  9. JCM Build - Voltage problem!
  10. Power Amplifiers & Gain
  11. Power tube maximum current draw from a power supply
  12. Tube Matching in a Power Amp?
  13. SE stereo / PP mono block schematic choices
  14. How to measure output transformer?
  15. Peavey VTM 60 vs Orange Tiny Terror
  16. Shoddy Packaging
  17. Schematic needed for Manley SnapperŪ from Manley Labs
  18. Resistor, capacitor across output transformer AKAI M-7
  19. eBay&etc cheap tube buffers/preamp .. anything good?
  20. 6N3 Preamp Question
  21. OK guys...be gentle
  22. 6SN7 and DN2540's
  23. 10k and 6k primary windings on OPT. Use for UL?
  24. Settings for PL509, EZ80 tubes on 539c tester
  25. replacing 6LGC with 6550 or KT88
  26. ECC83 input circuitry
  27. Dynaco MK III modifications
  28. SMPS for heaters
  29. Headphone tube-amp with oddball OPT
  30. Neon Lamp Question
  31. Curious old tubes from tandy
  32. 828 Triode Curves?
  33. 813 review
  34. tube circlotron for headphone amplifier
  35. valve headphone pre-amp
  36. Shengyi 6AQ5
  37. Burn in small signal tubes?
  38. 24V powered 6N11 amplifier, 0.25% distortion, pretty good!
  39. SS diode replacements
  40. Bass guitar amp using 832a/GU32 tubes
  41. can you check if everything is ok with el84 schematic please
  42. Advice on this amp schematic please
  43. 8156's
  44. Can't get anything from my new pre-amp
  45. Bottlehead Paramount Question
  46. need help with ac/dc am/fm radio
  47. Peculiar oscillation
  48. ECC83 settings for Taylor 45C
  49. New Jolida 302b amp owner questions
  50. Help with gyrator
  51. Some basic questions...
  52. I have a hard one for you guys
  53. CCS pulsing oscillation problem
  54. tube testers: different gM standards for same tube?
  55. Frank's Pre Still In Vogue?
  56. Home made tube amps
  57. Source for SED "winged C" tubes?
  58. Preamp Help
  59. Push Pull Class A
  60. Multi-Ways Output Transformers
  61. Redplating anomaly?
  62. Marshall JCM900 2500 preamp
  63. Just for fun power poll!
  64. BIASING A JADIS ORCHESTRA
  65. Yaqin MC-50L
  66. CJ PV5 Upgrades?
  67. New Member - Magnavox Amps
  68. Double parafeed
  69. 6550 grid characteristic help please
  70. Newbie- Tube Testing RF Amp tube
  71. Urgent:Wrongly order 220V Power supply for 230V enviroment
  72. Mono sub-out from one trafo?
  73. Mu Follower to drive a Push-Pull Amplifier?
  74. The 6934A Triode Tube
  75. Constant current sink for 6SN7
  76. 6V6 high voltage
  77. VTL deluxe 100 monoblk (KT88) need help?
  78. Va,Ia exeed limiting values in datasheeds ?
  79. Old DIYtube ST-35 electrolytics - swap?
  80. What Hammond for UK?
  81. What would you build with this transformer set?
  82. EL86 / 6CW5 + 6BQ7A amp design
  83. Western Electric theater amplifiers; how to hook them up?
  84. 12AU7,12B4A PSE schematic needs finishing!
  85. Dual grid and plate pins
  86. Best sounding ECC83 ?
  87. tube output for Playstation 1
  88. 6GX8 as Audio Level Indicator?
  89. Wurlitzer 6150 Organ Tube Amp convert Guitar Amp
  90. help on 12AU7 Preamp circuit
  91. Anyone bought tubes from http://www.nostubestore.com/ ?
  92. Tube pre-amp with exposed tubes?
  93. Using low voltage lamp in power supply
  94. GU 50 monoblock
  95. KT-88 Push Pull with CFB
  96. 12AX7 + ?? Ideas 2A3 // 6L6
  97. Formula for driver current requirement ?
  98. Need a little help with a regulator circuit if you are willing.
  99. Troubleshooting help for 12AQ5 amp
  100. Can anyone help with an ef86 tape preamp mod please?
  101. Herald Amp
  102. To switch B+ or not?
  103. All-tube vs tube/mosfet hybrid ?
  104. 6c33c-b question
  105. 12AT7 substitutes?
  106. 1st project salvaged sears receiver iron need good amp schematic
  107. FM-3 ? About parts replacement in IF stages
  108. simple EL84 parallel?
  109. Finished: Claus Byrtih EL34 amplifier on Isophon BS35 speaker set
  110. Yet another resistor thread
  111. Bogen CHB100 Valve Question
  112. 1st build; Adding load to PT secondary
  113. need help RCA RS 199C
  114. Unusually high Gm
  115. RH84 motorboating, stereo vs mono
  116. Use a tube rectifier for grid bias voltage, AA5 Radio tubes and usage.
  117. Cathode bypass with Long tail pair
  118. new chinese tube manufacturer
  119. Black Gate WKZ - can they be used in these circuits?
  120. Yet another question about HV Maida Regs
  121. Question about vacuum tubes
  122. Scott 299D Calibration
  123. Score! Bag-O-tubes!
  124. Building a tube integrated amp
  125. Audio Note Kits L1 Build...
  126. Need help with old mic amp
  127. Temporary hum
  128. Unidentified Tube - One for the detectives!
  129. Rogues?
  130. What about big tube RV278 Telefunken?
  131. variac variable transformer
  132. Tube amp OPT for Headphone Amp? (impedance matching question)
  133. current needed for 4x50l6 & 3x6sn6
  134. 6N11 tube work at 24V power supply?
  135. Heater voltage 5volt!
  136. help me choose a high end opt for tubelabs SE!
  137. 6L6/807 AB2 triode-- screen drive?
  138. help troubleshooting
  139. Anode Follower Article
  140. ECC802S 12AU7 ECC82 heater question
  141. Books for amplifiers
  142. E180F Preamp
  143. Don Allen Amp's ????
  144. To connect or not to connect..........
  145. Phonostage with tube moving coil
  146. 300b tube Temperature?
  147. Center tap transformer for elevated heater supplies
  148. single ended kt88 fuse blowing after an hour
  149. Help getting more gain from a Peavey Butcher
  150. Radiotron question
  151. suggested use for old telefunken tubes
  152. Using different ouputs for two different drivers
  153. Pete Millett Uniamp with 300b
  154. Cary slp-70
  155. How to combine 2 signals from 2 gain stages
  156. Increase B+ supply
  157. Aikido Tetra Sans Phono PCB
  158. Loadlines and distortion (6S33S/6S41S)
  159. home theatre bypass feature
  160. Doubling the power of hifi tube amplifiers
  161. Can this tube be used in audio amplifier?
  162. 100 V OPT
  163. Help me understand tube chart data
  164. Listening preference....
  165. tube socket legs?
  166. Stand alone gain stage pre-amp
  167. I kinda sorta burned up my K12-G power transformer
  168. RCA-182 Tube Amp
  169. Transformer potting material? what material?
  170. Ultimate 6xEL34 PPP monoblocks? Hopefully with your help :)
  171. tube amp/pre in car?
  172. Thorsten's tube Stage for TDA1541A
  173. Please help me identify these .45 3kv TRW caps
  174. Convert Gates pre-amp to DC filament?
  175. any suggestions for a mid-amp transformer for a hybrid design... like this circuit...
  176. how much C is too much C?
  177. fisher 70AZ
  178. RE: My first attempt at using Tube Cadd
  179. Srpp simple explanation
  180. Driver for a 807 em triode mode...help !!!
  181. 6J6-based SSMH?
  182. Small tube amp based on 6N6P
  183. replacement for Ei 12BH7AEG
  184. Preamp input tube noise
  185. How much is too much for a 6L6GB?
  186. What is the proper way to measure transformer inductance?
  187. Audio Research LS8 mod. to MKII
  188. Futterman stage max input
  189. How important is ESR in PS Caps?
  190. Pushing 6p14p too hard
  191. Who can tell me in Rome where can i buy antique Vacuum tube?
  192. Is the YAQIN MS-12B (220v +-10%) safe to use in UK
  193. Priboi biasing
  194. Whither Westrex ?.
  195. Tube Phono Pre-Amplifiers
  196. Pioneer SA400 -- Headphones hum, speakers don't. Why?
  197. DIY tube amps for surround sounds?
  198. Bad solder joints in Fender Deluxe VM
  199. Rotary switch for attenuator
  200. What is Matise circuit?
  201. 6bq5 red plating
  202. Technical questions about Melos MA-333
  203. What's this in old Fender amps?
  204. idiot proof mono push pull 6l6gc schematic wanted
  205. Passive Preamp Mod help
  206. KT77 OPT impedance
  207. i think i'm thru with 2A3 tubes
  208. VTC4U? Is that the name of the tube tower/shroud seller?
  209. 8417 triode el.. Mod??'s
  210. Gramp's Zenith MLT 15
  211. Class A tube amplifier Kit
  212. IERC tube coolers for EL34 on the Bay
  213. Stromberg Carlson ASR 433
  214. quads11&22 back into service
  215. New Tubes for sale
  216. Best design for Lundahl LL1679/PP
  217. 12U7 LTP vs. 6922 cascode
  218. Need help calculating value of balancing resistors
  219. 12ax7 12au7 preamp
  220. Western Electric 471A...any information ?
  221. Please Reply
  222. tube line preamplifier circuit
  223. 6L6 Ultralinear cathode Follower
  224. Grid current operation
  225. 431 based screen supply
  226. Where did all the money go?
  227. Hyperx soft start any good for valve amp situation?
  228. Class AB2, Class B, and Hifi
  229. PP 6b4g bad / distorted channel diagnostics
  230. Transformer usage ??
  231. Phono Amplifier
  232. Need EL84 Brand Identification
  233. RCA Octagon dating
  234. Most Accurate Bias Testing Method
  235. ASL AQ1003DT schematic or manual?
  236. Penta brand 6L6GC info?
  237. Mod to SE 6SN7 - 6V6 amp
  238. adjust filament ECC82/83
  239. Clear out of old valves - advice needed
  240. Help ID this OPT
  241. Help? 6n23p cathode follower
  242. DC Heater Caps
  243. Load Line and Biasing for Class AB 6550 power amp
  244. Amp project help needed
  245. LTP with CCS and feedback
  246. Clarion simple 2A3 amplifier
  247. Another question about plate curves and pentode load lines
  248. 5V Indrect Heated Rectifiers?
  249. Easy CCS
  250. I just setup my mimiwat n3 with a pair of Energy cb-20 speakers

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