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  1. 828 Triode Curves?
  2. 813 review
  3. tube circlotron for headphone amplifier
  4. valve headphone pre-amp
  5. Shengyi 6AQ5
  6. Burn in small signal tubes?
  7. 24V powered 6N11 amplifier, 0.25% distortion, pretty good!
  8. SS diode replacements
  9. Bass guitar amp using 832a/GU32 tubes
  10. can you check if everything is ok with el84 schematic please
  11. Advice on this amp schematic please
  12. 8156's
  13. Can't get anything from my new pre-amp
  14. Bottlehead Paramount Question
  15. need help with ac/dc am/fm radio
  16. Peculiar oscillation
  17. ECC83 settings for Taylor 45C
  18. New Jolida 302b amp owner questions
  19. Help with gyrator
  20. Some basic questions...
  21. I have a hard one for you guys
  22. CCS pulsing oscillation problem
  23. tube testers: different gM standards for same tube?
  24. Frank's Pre Still In Vogue?
  25. Home made tube amps
  26. Source for SED "winged C" tubes?
  27. Preamp Help
  28. Push Pull Class A
  29. Multi-Ways Output Transformers
  30. Redplating anomaly?
  31. Marshall JCM900 2500 preamp
  32. Just for fun power poll!
  33. BIASING A JADIS ORCHESTRA
  34. Yaqin MC-50L
  35. CJ PV5 Upgrades?
  36. New Member - Magnavox Amps
  37. Double parafeed
  38. 6550 grid characteristic help please
  39. Newbie- Tube Testing RF Amp tube
  40. Urgent:Wrongly order 220V Power supply for 230V enviroment
  41. Mono sub-out from one trafo?
  42. Mu Follower to drive a Push-Pull Amplifier?
  43. The 6934A Triode Tube
  44. Constant current sink for 6SN7
  45. 6V6 high voltage
  46. VTL deluxe 100 monoblk (KT88) need help?
  47. Va,Ia exeed limiting values in datasheeds ?
  48. Old DIYtube ST-35 electrolytics - swap?
  49. What Hammond for UK?
  50. What would you build with this transformer set?
  51. EL86 / 6CW5 + 6BQ7A amp design
  52. Western Electric theater amplifiers; how to hook them up?
  53. 12AU7,12B4A PSE schematic needs finishing!
  54. Dual grid and plate pins
  55. Best sounding ECC83 ?
  56. tube output for Playstation 1
  57. 6GX8 as Audio Level Indicator?
  58. Wurlitzer 6150 Organ Tube Amp convert Guitar Amp
  59. help on 12AU7 Preamp circuit
  60. Anyone bought tubes from http://www.nostubestore.com/ ?
  61. Tube pre-amp with exposed tubes?
  62. Using low voltage lamp in power supply
  63. GU 50 monoblock
  64. KT-88 Push Pull with CFB
  65. 12AX7 + ?? Ideas 2A3 // 6L6
  66. Formula for driver current requirement ?
  67. Need a little help with a regulator circuit if you are willing.
  68. Troubleshooting help for 12AQ5 amp
  69. Can anyone help with an ef86 tape preamp mod please?
  70. Herald Amp
  71. To switch B+ or not?
  72. All-tube vs tube/mosfet hybrid ?
  73. 6c33c-b question
  74. 12AT7 substitutes?
  75. 1st project salvaged sears receiver iron need good amp schematic
  76. FM-3 ? About parts replacement in IF stages
  77. simple EL84 parallel?
  78. Finished: Claus Byrtih EL34 amplifier on Isophon BS35 speaker set
  79. Yet another resistor thread
  80. Bogen CHB100 Valve Question
  81. 1st build; Adding load to PT secondary
  82. need help RCA RS 199C
  83. Unusually high Gm
  84. RH84 motorboating, stereo vs mono
  85. Use a tube rectifier for grid bias voltage, AA5 Radio tubes and usage.
  86. Cathode bypass with Long tail pair
  87. new chinese tube manufacturer
  88. Black Gate WKZ - can they be used in these circuits?
  89. Yet another question about HV Maida Regs
  90. Question about vacuum tubes
  91. Scott 299D Calibration
  92. Score! Bag-O-tubes!
  93. Building a tube integrated amp
  94. Audio Note Kits L1 Build...
  95. Need help with old mic amp
  96. Temporary hum
  97. Unidentified Tube - One for the detectives!
  98. Rogues?
  99. What about big tube RV278 Telefunken?
  100. variac variable transformer
  101. Tube amp OPT for Headphone Amp? (impedance matching question)
  102. current needed for 4x50l6 & 3x6sn6
  103. 6N11 tube work at 24V power supply?
  104. Heater voltage 5volt!
  105. help me choose a high end opt for tubelabs SE!
  106. 6L6/807 AB2 triode-- screen drive?
  107. help troubleshooting
  108. Anode Follower Article
  109. ECC802S 12AU7 ECC82 heater question
  110. Books for amplifiers
  111. E180F Preamp
  112. Don Allen Amp's ????
  113. To connect or not to connect..........
  114. Phonostage with tube moving coil
  115. 300b tube Temperature?
  116. Center tap transformer for elevated heater supplies
  117. single ended kt88 fuse blowing after an hour
  118. Help getting more gain from a Peavey Butcher
  119. Radiotron question
  120. suggested use for old telefunken tubes
  121. Using different ouputs for two different drivers
  122. Pete Millett Uniamp with 300b
  123. Cary slp-70
  124. How to combine 2 signals from 2 gain stages
  125. Increase B+ supply
  126. Aikido Tetra Sans Phono PCB
  127. Loadlines and distortion (6S33S/6S41S)
  128. home theatre bypass feature
  129. Doubling the power of hifi tube amplifiers
  130. Can this tube be used in audio amplifier?
  131. 100 V OPT
  132. Help me understand tube chart data
  133. Listening preference....
  134. tube socket legs?
  135. Stand alone gain stage pre-amp
  136. I kinda sorta burned up my K12-G power transformer
  137. RCA-182 Tube Amp
  138. Transformer potting material? what material?
  139. Ultimate 6xEL34 PPP monoblocks? Hopefully with your help :)
  140. tube amp/pre in car?
  141. Thorsten's tube Stage for TDA1541A
  142. Please help me identify these .45 3kv TRW caps
  143. Convert Gates pre-amp to DC filament?
  144. any suggestions for a mid-amp transformer for a hybrid design... like this circuit...
  145. how much C is too much C?
  146. fisher 70AZ
  147. RE: My first attempt at using Tube Cadd
  148. Srpp simple explanation
  149. Driver for a 807 em triode mode...help !!!
  150. 6J6-based SSMH?
  151. Small tube amp based on 6N6P
  152. replacement for Ei 12BH7AEG
  153. Preamp input tube noise
  154. How much is too much for a 6L6GB?
  155. What is the proper way to measure transformer inductance?
  156. Audio Research LS8 mod. to MKII
  157. Futterman stage max input
  158. How important is ESR in PS Caps?
  159. Pushing 6p14p too hard
  160. Who can tell me in Rome where can i buy antique Vacuum tube?
  161. Is the YAQIN MS-12B (220v +-10%) safe to use in UK
  162. Priboi biasing
  163. Whither Westrex ?.
  164. Tube Phono Pre-Amplifiers
  165. Pioneer SA400 -- Headphones hum, speakers don't. Why?
  166. DIY tube amps for surround sounds?
  167. Bad solder joints in Fender Deluxe VM
  168. Rotary switch for attenuator
  169. What is Matise circuit?
  170. 6bq5 red plating
  171. Technical questions about Melos MA-333
  172. What's this in old Fender amps?
  173. idiot proof mono push pull 6l6gc schematic wanted
  174. Passive Preamp Mod help
  175. KT77 OPT impedance
  176. i think i'm thru with 2A3 tubes
  177. VTC4U? Is that the name of the tube tower/shroud seller?
  178. 8417 triode el.. Mod??'s
  179. Gramp's Zenith MLT 15
  180. Class A tube amplifier Kit
  181. IERC tube coolers for EL34 on the Bay
  182. Stromberg Carlson ASR 433
  183. quads11&22 back into service
  184. New Tubes for sale
  185. Best design for Lundahl LL1679/PP
  186. 12U7 LTP vs. 6922 cascode
  187. Need help calculating value of balancing resistors
  188. 12ax7 12au7 preamp
  189. Western Electric 471A...any information ?
  190. Please Reply
  191. tube line preamplifier circuit
  192. 6L6 Ultralinear cathode Follower
  193. Grid current operation
  194. 431 based screen supply
  195. Where did all the money go?
  196. Hyperx soft start any good for valve amp situation?
  197. Class AB2, Class B, and Hifi
  198. PP 6b4g bad / distorted channel diagnostics
  199. Transformer usage ??
  200. Phono Amplifier
  201. Need EL84 Brand Identification
  202. RCA Octagon dating
  203. Most Accurate Bias Testing Method
  204. ASL AQ1003DT schematic or manual?
  205. Penta brand 6L6GC info?
  206. Mod to SE 6SN7 - 6V6 amp
  207. adjust filament ECC82/83
  208. Clear out of old valves - advice needed
  209. Help ID this OPT
  210. Help? 6n23p cathode follower
  211. DC Heater Caps
  212. Load Line and Biasing for Class AB 6550 power amp
  213. Amp project help needed
  214. LTP with CCS and feedback
  215. Clarion simple 2A3 amplifier
  216. Another question about plate curves and pentode load lines
  217. 5V Indrect Heated Rectifiers?
  218. Easy CCS
  219. I just setup my mimiwat n3 with a pair of Energy cb-20 speakers
  220. First watt F2/little dot MK III
  221. Old Motorola console tube amp, fuse problem
  222. How much performance difference w/ this config?
  223. 6P8S datasheet, help !!
  224. DHT IMD
  225. How to calculate OPT transformer windings
  226. Newbie Questions
  227. Building a Harmonic Distortion Generator
  228. plate curves and max ratings questions
  229. Heater-cathode DC conduction resistance
  230. EL 84 Capacitor Equivalent
  231. How do they get away with this?
  232. well-loved Sherwood "popping" prob mouse pee
  233. Tube Newb: 12sn7 and 12sl7 interchangeable?
  234. Totem-Pole OTL with 6c33c tubes and 0.079 % THD at 20 Watt
  235. sonic frontiers sfm-75
  236. Chinese tube amp mods?
  237. PSU for JE Labs Simple 45/2A3
  238. frustrated ,Bought a 845 NOS - springs are discconnected need help
  239. Running water sound in amp
  240. Peerless 16458 output transformers
  241. Noisy high-gain preamplifier
  242. Cheap ($235) SE Tube amp kit, transformer and chassis on ebay
  243. 2A3 single plate RCA/Cunningham tube prices
  244. output transformer power rating
  245. Rectifier Foward Voltage?
  246. Help With 6Y6 amp
  247. What are 12AT7/ECC81 power drivers ?
  248. Help with these Russian GU50 tube amplifier
  249. Eico ST-70 Supermods
  250. Mullard PZ30, how's its Peak Inverse Voltage?

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