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  1. tube testers: different gM standards for same tube?
  2. Frank's Pre Still In Vogue?
  3. Home made tube amps
  4. Source for SED "winged C" tubes?
  5. Preamp Help
  6. Push Pull Class A
  7. Multi-Ways Output Transformers
  8. Redplating anomaly?
  9. Just for fun power poll!
  10. BIASING A JADIS ORCHESTRA
  11. Yaqin MC-50L
  12. CJ PV5 Upgrades?
  13. New Member - Magnavox Amps
  14. Double parafeed
  15. 6550 grid characteristic help please
  16. Newbie- Tube Testing RF Amp tube
  17. Urgent:Wrongly order 220V Power supply for 230V enviroment
  18. Mono sub-out from one trafo?
  19. Mu Follower to drive a Push-Pull Amplifier?
  20. The 6934A Triode Tube
  21. Constant current sink for 6SN7
  22. 6V6 high voltage
  23. VTL deluxe 100 monoblk (KT88) need help?
  24. Va,Ia exeed limiting values in datasheeds ?
  25. Old DIYtube ST-35 electrolytics - swap?
  26. What Hammond for UK?
  27. What would you build with this transformer set?
  28. EL86 / 6CW5 + 6BQ7A amp design
  29. Western Electric theater amplifiers; how to hook them up?
  30. 12AU7,12B4A PSE schematic needs finishing!
  31. Dual grid and plate pins
  32. Best sounding ECC83 ?
  33. tube output for Playstation 1
  34. 6GX8 as Audio Level Indicator?
  35. help on 12AU7 Preamp circuit
  36. Anyone bought tubes from http://www.nostubestore.com/ ?
  37. Tube pre-amp with exposed tubes?
  38. Using low voltage lamp in power supply
  39. GU 50 monoblock
  40. KT-88 Push Pull with CFB
  41. 12AX7 + ?? Ideas 2A3 // 6L6
  42. Formula for driver current requirement ?
  43. Need a little help with a regulator circuit if you are willing.
  44. Troubleshooting help for 12AQ5 amp
  45. Can anyone help with an ef86 tape preamp mod please?
  46. Herald Amp
  47. To switch B+ or not?
  48. All-tube vs tube/mosfet hybrid ?
  49. 6c33c-b question
  50. 12AT7 substitutes?
  51. 1st project salvaged sears receiver iron need good amp schematic
  52. FM-3 ? About parts replacement in IF stages
  53. simple EL84 parallel?
  54. Finished: Claus Byrtih EL34 amplifier on Isophon BS35 speaker set
  55. Yet another resistor thread
  56. Bogen CHB100 Valve Question
  57. 1st build; Adding load to PT secondary
  58. need help RCA RS 199C
  59. Unusually high Gm
  60. RH84 motorboating, stereo vs mono
  61. Use a tube rectifier for grid bias voltage, AA5 Radio tubes and usage.
  62. Cathode bypass with Long tail pair
  63. new chinese tube manufacturer
  64. Black Gate WKZ - can they be used in these circuits?
  65. Yet another question about HV Maida Regs
  66. Question about vacuum tubes
  67. Scott 299D Calibration
  68. Score! Bag-O-tubes!
  69. Building a tube integrated amp
  70. Audio Note Kits L1 Build...
  71. Need help with old mic amp
  72. Temporary hum
  73. Unidentified Tube - One for the detectives!
  74. Rogues?
  75. What about big tube RV278 Telefunken?
  76. variac variable transformer
  77. Tube amp OPT for Headphone Amp? (impedance matching question)
  78. current needed for 4x50l6 & 3x6sn6
  79. 6N11 tube work at 24V power supply?
  80. Heater voltage 5volt!
  81. help me choose a high end opt for tubelabs SE!
  82. 6L6/807 AB2 triode-- screen drive?
  83. help troubleshooting
  84. Anode Follower Article
  85. ECC802S 12AU7 ECC82 heater question
  86. Books for amplifiers
  87. E180F Preamp
  88. Don Allen Amp's ????
  89. To connect or not to connect..........
  90. Phonostage with tube moving coil
  91. 300b tube Temperature?
  92. Center tap transformer for elevated heater supplies
  93. single ended kt88 fuse blowing after an hour
  94. Radiotron question
  95. suggested use for old telefunken tubes
  96. Using different ouputs for two different drivers
  97. Pete Millett Uniamp with 300b
  98. Cary slp-70
  99. How to combine 2 signals from 2 gain stages
  100. Increase B+ supply
  101. Aikido Tetra Sans Phono PCB
  102. Loadlines and distortion (6S33S/6S41S)
  103. home theatre bypass feature
  104. Doubling the power of hifi tube amplifiers
  105. Can this tube be used in audio amplifier?
  106. 100 V OPT
  107. Help me understand tube chart data
  108. Listening preference....
  109. tube socket legs?
  110. Stand alone gain stage pre-amp
  111. I kinda sorta burned up my K12-G power transformer
  112. RCA-182 Tube Amp
  113. Transformer potting material? what material?
  114. Ultimate 6xEL34 PPP monoblocks? Hopefully with your help :)
  115. tube amp/pre in car?
  116. Thorsten's tube Stage for TDA1541A
  117. Convert Gates pre-amp to DC filament?
  118. any suggestions for a mid-amp transformer for a hybrid design... like this circuit...
  119. how much C is too much C?
  120. fisher 70AZ
  121. RE: My first attempt at using Tube Cadd
  122. Srpp simple explanation
  123. Driver for a 807 em triode mode...help !!!
  124. 6J6-based SSMH?
  125. Small tube amp based on 6N6P
  126. replacement for Ei 12BH7AEG
  127. Preamp input tube noise
  128. How much is too much for a 6L6GB?
  129. What is the proper way to measure transformer inductance?
  130. Audio Research LS8 mod. to MKII
  131. Futterman stage max input
  132. Pushing 6p14p too hard
  133. Who can tell me in Rome where can i buy antique Vacuum tube?
  134. Is the YAQIN MS-12B (220v +-10%) safe to use in UK
  135. Priboi biasing
  136. Whither Westrex ?.
  137. Tube Phono Pre-Amplifiers
  138. Pioneer SA400 -- Headphones hum, speakers don't. Why?
  139. DIY tube amps for surround sounds?
  140. Rotary switch for attenuator
  141. What is Matise circuit?
  142. 6bq5 red plating
  143. Technical questions about Melos MA-333
  144. idiot proof mono push pull 6l6gc schematic wanted
  145. Passive Preamp Mod help
  146. KT77 OPT impedance
  147. i think i'm thru with 2A3 tubes
  148. VTC4U? Is that the name of the tube tower/shroud seller?
  149. 8417 triode el.. Mod??'s
  150. Gramp's Zenith MLT 15
  151. Class A tube amplifier Kit
  152. IERC tube coolers for EL34 on the Bay
  153. Stromberg Carlson ASR 433
  154. quads11&22 back into service
  155. New Tubes for sale
  156. Best design for Lundahl LL1679/PP
  157. 12U7 LTP vs. 6922 cascode
  158. Need help calculating value of balancing resistors
  159. 12ax7 12au7 preamp
  160. Western Electric 471A...any information ?
  161. Please Reply
  162. tube line preamplifier circuit
  163. 6L6 Ultralinear cathode Follower
  164. Grid current operation
  165. 431 based screen supply
  166. Where did all the money go?
  167. Hyperx soft start any good for valve amp situation?
  168. Class AB2, Class B, and Hifi
  169. PP 6b4g bad / distorted channel diagnostics
  170. Transformer usage ??
  171. Phono Amplifier
  172. Need EL84 Brand Identification
  173. RCA Octagon dating
  174. Most Accurate Bias Testing Method
  175. ASL AQ1003DT schematic or manual?
  176. Penta brand 6L6GC info?
  177. Mod to SE 6SN7 - 6V6 amp
  178. adjust filament ECC82/83
  179. Clear out of old valves - advice needed
  180. Help ID this OPT
  181. Help? 6n23p cathode follower
  182. DC Heater Caps
  183. Load Line and Biasing for Class AB 6550 power amp
  184. Amp project help needed
  185. LTP with CCS and feedback
  186. Clarion simple 2A3 amplifier
  187. Another question about plate curves and pentode load lines
  188. 5V Indrect Heated Rectifiers?
  189. Easy CCS
  190. I just setup my mimiwat n3 with a pair of Energy cb-20 speakers
  191. First watt F2/little dot MK III
  192. Old Motorola console tube amp, fuse problem
  193. How much performance difference w/ this config?
  194. 6P8S datasheet, help !!
  195. DHT IMD
  196. How to calculate OPT transformer windings
  197. Newbie Questions
  198. Building a Harmonic Distortion Generator
  199. plate curves and max ratings questions
  200. Heater-cathode DC conduction resistance
  201. EL 84 Capacitor Equivalent
  202. How do they get away with this?
  203. well-loved Sherwood "popping" prob mouse pee
  204. Tube Newb: 12sn7 and 12sl7 interchangeable?
  205. Totem-Pole OTL with 6c33c tubes and 0.079 % THD at 20 Watt
  206. sonic frontiers sfm-75
  207. Chinese tube amp mods?
  208. PSU for JE Labs Simple 45/2A3
  209. frustrated ,Bought a 845 NOS - springs are discconnected need help
  210. Running water sound in amp
  211. Peerless 16458 output transformers
  212. Noisy high-gain preamplifier
  213. Cheap ($235) SE Tube amp kit, transformer and chassis on ebay
  214. 2A3 single plate RCA/Cunningham tube prices
  215. output transformer power rating
  216. Rectifier Foward Voltage?
  217. Help With 6Y6 amp
  218. What are 12AT7/ECC81 power drivers ?
  219. Help with these Russian GU50 tube amplifier
  220. Eico ST-70 Supermods
  221. Mullard PZ30, how's its Peak Inverse Voltage?
  222. 12AU7 in cascode configuration
  223. Bad tube in old record player?
  224. check this out glas-fiber cartridge
  225. cathode caps
  226. Aikido HV PSU
  227. Distance between 6N23P and a cap?
  228. solid and strand wire in amp
  229. Phillips Music Sudio
  230. LTPI Grid stopper value affect on harmonics
  231. WTF. What's going on here.
  232. 7-pin pcb mount socket with shield?
  233. SIMPLE remote volume control with alps motorized pot
  234. Hybrid Partial Feedback SE Amplifier
  235. HV +B Connector
  236. Eico experts needed: PEC in 2050 driver stage bad
  237. Best sounding linestage/buffer topology?
  238. Using ECC88
  239. what tubes should I upgrade a mini watt with I currently have the stock 6p14 and 6bq5
  240. EL34 cathode bias PA
  241. Tube Amp Art
  242. Quick OT Question
  243. Power Transformer
  244. ampex 354? some questions
  245. Good power Filter Capacitors
  246. Fisher 101d blow fuse
  247. Jolida 502A lost output...?
  248. Codename "Tapyrus", my ongoing DIY headphone amp
  249. RIAA preamp with DHTs
  250. Dynaco Mark VI feedback values

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