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

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