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  1. Push Pull Class A
  2. Multi-Ways Output Transformers
  3. Redplating anomaly?
  4. Marshall JCM900 2500 preamp
  5. Just for fun power poll!
  6. BIASING A JADIS ORCHESTRA
  7. Yaqin MC-50L
  8. CJ PV5 Upgrades?
  9. New Member - Magnavox Amps
  10. Double parafeed
  11. 6550 grid characteristic help please
  12. Newbie- Tube Testing RF Amp tube
  13. Urgent:Wrongly order 220V Power supply for 230V enviroment
  14. Mono sub-out from one trafo?
  15. Mu Follower to drive a Push-Pull Amplifier?
  16. The 6934A Triode Tube
  17. Constant current sink for 6SN7
  18. 6V6 high voltage
  19. VTL deluxe 100 monoblk (KT88) need help?
  20. Va,Ia exeed limiting values in datasheeds ?
  21. Old DIYtube ST-35 electrolytics - swap?
  22. What Hammond for UK?
  23. What would you build with this transformer set?
  24. EL86 / 6CW5 + 6BQ7A amp design
  25. Western Electric theater amplifiers; how to hook them up?
  26. 12AU7,12B4A PSE schematic needs finishing!
  27. Dual grid and plate pins
  28. Best sounding ECC83 ?
  29. tube output for Playstation 1
  30. 6GX8 as Audio Level Indicator?
  31. Wurlitzer 6150 Organ Tube Amp convert Guitar Amp
  32. help on 12AU7 Preamp circuit
  33. Anyone bought tubes from http://www.nostubestore.com/ ?
  34. Tube pre-amp with exposed tubes?
  35. Using low voltage lamp in power supply
  36. GU 50 monoblock
  37. KT-88 Push Pull with CFB
  38. 12AX7 + ?? Ideas 2A3 // 6L6
  39. Formula for driver current requirement ?
  40. Need a little help with a regulator circuit if you are willing.
  41. Troubleshooting help for 12AQ5 amp
  42. Can anyone help with an ef86 tape preamp mod please?
  43. Herald Amp
  44. To switch B+ or not?
  45. All-tube vs tube/mosfet hybrid ?
  46. 6c33c-b question
  47. 12AT7 substitutes?
  48. 1st project salvaged sears receiver iron need good amp schematic
  49. FM-3 ? About parts replacement in IF stages
  50. simple EL84 parallel?
  51. Finished: Claus Byrtih EL34 amplifier on Isophon BS35 speaker set
  52. Yet another resistor thread
  53. Bogen CHB100 Valve Question
  54. 1st build; Adding load to PT secondary
  55. need help RCA RS 199C
  56. Unusually high Gm
  57. RH84 motorboating, stereo vs mono
  58. Use a tube rectifier for grid bias voltage, AA5 Radio tubes and usage.
  59. Cathode bypass with Long tail pair
  60. new chinese tube manufacturer
  61. Black Gate WKZ - can they be used in these circuits?
  62. Yet another question about HV Maida Regs
  63. Question about vacuum tubes
  64. Scott 299D Calibration
  65. Score! Bag-O-tubes!
  66. Building a tube integrated amp
  67. Audio Note Kits L1 Build...
  68. Need help with old mic amp
  69. Temporary hum
  70. Unidentified Tube - One for the detectives!
  71. Rogues?
  72. What about big tube RV278 Telefunken?
  73. variac variable transformer
  74. Tube amp OPT for Headphone Amp? (impedance matching question)
  75. current needed for 4x50l6 & 3x6sn6
  76. 6N11 tube work at 24V power supply?
  77. Heater voltage 5volt!
  78. help me choose a high end opt for tubelabs SE!
  79. 6L6/807 AB2 triode-- screen drive?
  80. help troubleshooting
  81. Anode Follower Article
  82. ECC802S 12AU7 ECC82 heater question
  83. Books for amplifiers
  84. E180F Preamp
  85. Don Allen Amp's ????
  86. To connect or not to connect..........
  87. Phonostage with tube moving coil
  88. 300b tube Temperature?
  89. Center tap transformer for elevated heater supplies
  90. single ended kt88 fuse blowing after an hour
  91. Help getting more gain from a Peavey Butcher
  92. Radiotron question
  93. suggested use for old telefunken tubes
  94. Using different ouputs for two different drivers
  95. Pete Millett Uniamp with 300b
  96. Cary slp-70
  97. How to combine 2 signals from 2 gain stages
  98. Increase B+ supply
  99. Aikido Tetra Sans Phono PCB
  100. Loadlines and distortion (6S33S/6S41S)
  101. home theatre bypass feature
  102. Doubling the power of hifi tube amplifiers
  103. Can this tube be used in audio amplifier?
  104. 100 V OPT
  105. Help me understand tube chart data
  106. Listening preference....
  107. tube socket legs?
  108. Stand alone gain stage pre-amp
  109. I kinda sorta burned up my K12-G power transformer
  110. RCA-182 Tube Amp
  111. Transformer potting material? what material?
  112. Ultimate 6xEL34 PPP monoblocks? Hopefully with your help :)
  113. tube amp/pre in car?
  114. Thorsten's tube Stage for TDA1541A
  115. Please help me identify these .45 3kv TRW caps
  116. Convert Gates pre-amp to DC filament?
  117. any suggestions for a mid-amp transformer for a hybrid design... like this circuit...
  118. how much C is too much C?
  119. fisher 70AZ
  120. RE: My first attempt at using Tube Cadd
  121. Srpp simple explanation
  122. Driver for a 807 em triode mode...help !!!
  123. 6J6-based SSMH?
  124. Small tube amp based on 6N6P
  125. replacement for Ei 12BH7AEG
  126. Preamp input tube noise
  127. How much is too much for a 6L6GB?
  128. What is the proper way to measure transformer inductance?
  129. Audio Research LS8 mod. to MKII
  130. Futterman stage max input
  131. How important is ESR in PS Caps?
  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. Bad solder joints in Fender Deluxe VM
  141. Rotary switch for attenuator
  142. What is Matise circuit?
  143. 6bq5 red plating
  144. Technical questions about Melos MA-333
  145. What's this in old Fender amps?
  146. idiot proof mono push pull 6l6gc schematic wanted
  147. Passive Preamp Mod help
  148. KT77 OPT impedance
  149. i think i'm thru with 2A3 tubes
  150. VTC4U? Is that the name of the tube tower/shroud seller?
  151. 8417 triode el.. Mod??'s
  152. Gramp's Zenith MLT 15
  153. Class A tube amplifier Kit
  154. IERC tube coolers for EL34 on the Bay
  155. Stromberg Carlson ASR 433
  156. quads11&22 back into service
  157. New Tubes for sale
  158. Best design for Lundahl LL1679/PP
  159. 12U7 LTP vs. 6922 cascode
  160. Need help calculating value of balancing resistors
  161. 12ax7 12au7 preamp
  162. Western Electric 471A...any information ?
  163. Please Reply
  164. tube line preamplifier circuit
  165. 6L6 Ultralinear cathode Follower
  166. Grid current operation
  167. 431 based screen supply
  168. Where did all the money go?
  169. Hyperx soft start any good for valve amp situation?
  170. Class AB2, Class B, and Hifi
  171. PP 6b4g bad / distorted channel diagnostics
  172. Transformer usage ??
  173. Phono Amplifier
  174. Need EL84 Brand Identification
  175. RCA Octagon dating
  176. Most Accurate Bias Testing Method
  177. ASL AQ1003DT schematic or manual?
  178. Penta brand 6L6GC info?
  179. Mod to SE 6SN7 - 6V6 amp
  180. adjust filament ECC82/83
  181. Clear out of old valves - advice needed
  182. Help ID this OPT
  183. Help? 6n23p cathode follower
  184. DC Heater Caps
  185. Load Line and Biasing for Class AB 6550 power amp
  186. Amp project help needed
  187. LTP with CCS and feedback
  188. Clarion simple 2A3 amplifier
  189. Another question about plate curves and pentode load lines
  190. 5V Indrect Heated Rectifiers?
  191. Easy CCS
  192. I just setup my mimiwat n3 with a pair of Energy cb-20 speakers
  193. First watt F2/little dot MK III
  194. Old Motorola console tube amp, fuse problem
  195. How much performance difference w/ this config?
  196. 6P8S datasheet, help !!
  197. DHT IMD
  198. How to calculate OPT transformer windings
  199. Newbie Questions
  200. Building a Harmonic Distortion Generator
  201. plate curves and max ratings questions
  202. Heater-cathode DC conduction resistance
  203. EL 84 Capacitor Equivalent
  204. How do they get away with this?
  205. well-loved Sherwood "popping" prob mouse pee
  206. Tube Newb: 12sn7 and 12sl7 interchangeable?
  207. Totem-Pole OTL with 6c33c tubes and 0.079 % THD at 20 Watt
  208. sonic frontiers sfm-75
  209. Chinese tube amp mods?
  210. PSU for JE Labs Simple 45/2A3
  211. frustrated ,Bought a 845 NOS - springs are discconnected need help
  212. Running water sound in amp
  213. Peerless 16458 output transformers
  214. Noisy high-gain preamplifier
  215. Cheap ($235) SE Tube amp kit, transformer and chassis on ebay
  216. 2A3 single plate RCA/Cunningham tube prices
  217. output transformer power rating
  218. Rectifier Foward Voltage?
  219. Help With 6Y6 amp
  220. What are 12AT7/ECC81 power drivers ?
  221. Help with these Russian GU50 tube amplifier
  222. Eico ST-70 Supermods
  223. Mullard PZ30, how's its Peak Inverse Voltage?
  224. Optical compressor project
  225. 12AU7 in cascode configuration
  226. Bad tube in old record player?
  227. check this out glas-fiber cartridge
  228. cathode caps
  229. Aikido HV PSU
  230. Distance between 6N23P and a cap?
  231. solid and strand wire in amp
  232. Phillips Music Sudio
  233. LTPI Grid stopper value affect on harmonics
  234. WTF. What's going on here.
  235. 7-pin pcb mount socket with shield?
  236. SIMPLE remote volume control with alps motorized pot
  237. Hybrid Partial Feedback SE Amplifier
  238. HV +B Connector
  239. Eico experts needed: PEC in 2050 driver stage bad
  240. Best sounding linestage/buffer topology?
  241. Using ECC88
  242. what tubes should I upgrade a mini watt with I currently have the stock 6p14 and 6bq5
  243. EL34 cathode bias PA
  244. Tube Amp Art
  245. Quick OT Question
  246. Power Transformer
  247. ampex 354? some questions
  248. Good power Filter Capacitors
  249. Fisher 101d blow fuse
  250. Valco Model 1200 help

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