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  1. 6N3 Preamp Question
  2. OK guys...be gentle
  3. 6SN7 and DN2540's
  4. 10k and 6k primary windings on OPT. Use for UL?
  5. Settings for PL509, EZ80 tubes on 539c tester
  6. replacing 6LGC with 6550 or KT88
  7. ECC83 input circuitry
  8. Dynaco MK III modifications
  9. SMPS for heaters
  10. Headphone tube-amp with oddball OPT
  11. Neon Lamp Question
  12. Curious old tubes from tandy
  13. 828 Triode Curves?
  14. 813 review
  15. tube circlotron for headphone amplifier
  16. valve headphone pre-amp
  17. Shengyi 6AQ5
  18. Burn in small signal tubes?
  19. 24V powered 6N11 amplifier, 0.25% distortion, pretty good!
  20. SS diode replacements
  21. can you check if everything is ok with el84 schematic please
  22. Advice on this amp schematic please
  23. 8156's
  24. Can't get anything from my new pre-amp
  25. Bottlehead Paramount Question
  26. need help with ac/dc am/fm radio
  27. Peculiar oscillation
  28. ECC83 settings for Taylor 45C
  29. New Jolida 302b amp owner questions
  30. Help with gyrator
  31. Some basic questions...
  32. I have a hard one for you guys
  33. CCS pulsing oscillation problem
  34. tube testers: different gM standards for same tube?
  35. Frank's Pre Still In Vogue?
  36. Home made tube amps
  37. Source for SED "winged C" tubes?
  38. Preamp Help
  39. Push Pull Class A
  40. Multi-Ways Output Transformers
  41. Redplating anomaly?
  42. Just for fun power poll!
  43. BIASING A JADIS ORCHESTRA
  44. Yaqin MC-50L
  45. CJ PV5 Upgrades?
  46. New Member - Magnavox Amps
  47. Double parafeed
  48. 6550 grid characteristic help please
  49. Newbie- Tube Testing RF Amp tube
  50. Urgent:Wrongly order 220V Power supply for 230V enviroment
  51. Mono sub-out from one trafo?
  52. Mu Follower to drive a Push-Pull Amplifier?
  53. The 6934A Triode Tube
  54. Constant current sink for 6SN7
  55. 6V6 high voltage
  56. VTL deluxe 100 monoblk (KT88) need help?
  57. Va,Ia exeed limiting values in datasheeds ?
  58. Old DIYtube ST-35 electrolytics - swap?
  59. What Hammond for UK?
  60. What would you build with this transformer set?
  61. EL86 / 6CW5 + 6BQ7A amp design
  62. Western Electric theater amplifiers; how to hook them up?
  63. 12AU7,12B4A PSE schematic needs finishing!
  64. Dual grid and plate pins
  65. Best sounding ECC83 ?
  66. tube output for Playstation 1
  67. 6GX8 as Audio Level Indicator?
  68. help on 12AU7 Preamp circuit
  69. Anyone bought tubes from http://www.nostubestore.com/ ?
  70. Tube pre-amp with exposed tubes?
  71. Using low voltage lamp in power supply
  72. GU 50 monoblock
  73. KT-88 Push Pull with CFB
  74. 12AX7 + ?? Ideas 2A3 // 6L6
  75. Formula for driver current requirement ?
  76. Need a little help with a regulator circuit if you are willing.
  77. Troubleshooting help for 12AQ5 amp
  78. Can anyone help with an ef86 tape preamp mod please?
  79. Herald Amp
  80. To switch B+ or not?
  81. All-tube vs tube/mosfet hybrid ?
  82. 6c33c-b question
  83. 12AT7 substitutes?
  84. 1st project salvaged sears receiver iron need good amp schematic
  85. FM-3 ? About parts replacement in IF stages
  86. simple EL84 parallel?
  87. Finished: Claus Byrtih EL34 amplifier on Isophon BS35 speaker set
  88. Bogen CHB100 Valve Question
  89. 1st build; Adding load to PT secondary
  90. need help RCA RS 199C
  91. Unusually high Gm
  92. RH84 motorboating, stereo vs mono
  93. Use a tube rectifier for grid bias voltage, AA5 Radio tubes and usage.
  94. Cathode bypass with Long tail pair
  95. new chinese tube manufacturer
  96. Black Gate WKZ - can they be used in these circuits?
  97. Yet another question about HV Maida Regs
  98. Question about vacuum tubes
  99. Scott 299D Calibration
  100. Score! Bag-O-tubes!
  101. Building a tube integrated amp
  102. Audio Note Kits L1 Build...
  103. Need help with old mic amp
  104. Temporary hum
  105. Unidentified Tube - One for the detectives!
  106. Rogues?
  107. What about big tube RV278 Telefunken?
  108. variac variable transformer
  109. Tube amp OPT for Headphone Amp? (impedance matching question)
  110. current needed for 4x50l6 & 3x6sn6
  111. 6N11 tube work at 24V power supply?
  112. Heater voltage 5volt!
  113. help me choose a high end opt for tubelabs SE!
  114. 6L6/807 AB2 triode-- screen drive?
  115. help troubleshooting
  116. Anode Follower Article
  117. ECC802S 12AU7 ECC82 heater question
  118. Books for amplifiers
  119. E180F Preamp
  120. Don Allen Amp's ????
  121. To connect or not to connect..........
  122. Phonostage with tube moving coil
  123. 300b tube Temperature?
  124. Center tap transformer for elevated heater supplies
  125. single ended kt88 fuse blowing after an hour
  126. Radiotron question
  127. suggested use for old telefunken tubes
  128. Using different ouputs for two different drivers
  129. Pete Millett Uniamp with 300b
  130. Cary slp-70
  131. How to combine 2 signals from 2 gain stages
  132. Increase B+ supply
  133. Aikido Tetra Sans Phono PCB
  134. Loadlines and distortion (6S33S/6S41S)
  135. home theatre bypass feature
  136. Doubling the power of hifi tube amplifiers
  137. Can this tube be used in audio amplifier?
  138. 100 V OPT
  139. Help me understand tube chart data
  140. Listening preference....
  141. tube socket legs?
  142. Stand alone gain stage pre-amp
  143. I kinda sorta burned up my K12-G power transformer
  144. RCA-182 Tube Amp
  145. Transformer potting material? what material?
  146. Ultimate 6xEL34 PPP monoblocks? Hopefully with your help :)
  147. tube amp/pre in car?
  148. Thorsten's tube Stage for TDA1541A
  149. Convert Gates pre-amp to DC filament?
  150. any suggestions for a mid-amp transformer for a hybrid design... like this circuit...
  151. how much C is too much C?
  152. fisher 70AZ
  153. RE: My first attempt at using Tube Cadd
  154. Srpp simple explanation
  155. Driver for a 807 em triode mode...help !!!
  156. 6J6-based SSMH?
  157. Small tube amp based on 6N6P
  158. replacement for Ei 12BH7AEG
  159. Preamp input tube noise
  160. How much is too much for a 6L6GB?
  161. What is the proper way to measure transformer inductance?
  162. Audio Research LS8 mod. to MKII
  163. Futterman stage max input
  164. Pushing 6p14p too hard
  165. Who can tell me in Rome where can i buy antique Vacuum tube?
  166. Is the YAQIN MS-12B (220v +-10%) safe to use in UK
  167. Priboi biasing
  168. Whither Westrex ?.
  169. Tube Phono Pre-Amplifiers
  170. Pioneer SA400 -- Headphones hum, speakers don't. Why?
  171. DIY tube amps for surround sounds?
  172. Rotary switch for attenuator
  173. What is Matise circuit?
  174. 6bq5 red plating
  175. Technical questions about Melos MA-333
  176. idiot proof mono push pull 6l6gc schematic wanted
  177. Passive Preamp Mod help
  178. KT77 OPT impedance
  179. i think i'm thru with 2A3 tubes
  180. VTC4U? Is that the name of the tube tower/shroud seller?
  181. 8417 triode el.. Mod??'s
  182. Gramp's Zenith MLT 15
  183. Class A tube amplifier Kit
  184. IERC tube coolers for EL34 on the Bay
  185. Stromberg Carlson ASR 433
  186. quads11&22 back into service
  187. New Tubes for sale
  188. Best design for Lundahl LL1679/PP
  189. 12U7 LTP vs. 6922 cascode
  190. Need help calculating value of balancing resistors
  191. 12ax7 12au7 preamp
  192. Western Electric 471A...any information ?
  193. Please Reply
  194. tube line preamplifier circuit
  195. 6L6 Ultralinear cathode Follower
  196. Grid current operation
  197. 431 based screen supply
  198. Where did all the money go?
  199. Hyperx soft start any good for valve amp situation?
  200. Class AB2, Class B, and Hifi
  201. PP 6b4g bad / distorted channel diagnostics
  202. Transformer usage ??
  203. Phono Amplifier
  204. Need EL84 Brand Identification
  205. RCA Octagon dating
  206. Most Accurate Bias Testing Method
  207. ASL AQ1003DT schematic or manual?
  208. Penta brand 6L6GC info?
  209. Mod to SE 6SN7 - 6V6 amp
  210. adjust filament ECC82/83
  211. Clear out of old valves - advice needed
  212. Help ID this OPT
  213. Help? 6n23p cathode follower
  214. DC Heater Caps
  215. Load Line and Biasing for Class AB 6550 power amp
  216. Amp project help needed
  217. LTP with CCS and feedback
  218. Clarion simple 2A3 amplifier
  219. Another question about plate curves and pentode load lines
  220. 5V Indrect Heated Rectifiers?
  221. Easy CCS
  222. I just setup my mimiwat n3 with a pair of Energy cb-20 speakers
  223. First watt F2/little dot MK III
  224. Old Motorola console tube amp, fuse problem
  225. How much performance difference w/ this config?
  226. 6P8S datasheet, help !!
  227. DHT IMD
  228. How to calculate OPT transformer windings
  229. Newbie Questions
  230. Building a Harmonic Distortion Generator
  231. plate curves and max ratings questions
  232. Heater-cathode DC conduction resistance
  233. EL 84 Capacitor Equivalent
  234. How do they get away with this?
  235. well-loved Sherwood "popping" prob mouse pee
  236. Tube Newb: 12sn7 and 12sl7 interchangeable?
  237. Totem-Pole OTL with 6c33c tubes and 0.079 % THD at 20 Watt
  238. sonic frontiers sfm-75
  239. Chinese tube amp mods?
  240. PSU for JE Labs Simple 45/2A3
  241. frustrated ,Bought a 845 NOS - springs are discconnected need help
  242. Running water sound in amp
  243. Peerless 16458 output transformers
  244. Noisy high-gain preamplifier
  245. Cheap ($235) SE Tube amp kit, transformer and chassis on ebay
  246. 2A3 single plate RCA/Cunningham tube prices
  247. output transformer power rating
  248. Rectifier Foward Voltage?
  249. Help With 6Y6 amp
  250. What are 12AT7/ECC81 power drivers ?

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