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  1. new chinese tube manufacturer
  2. Black Gate WKZ - can they be used in these circuits?
  3. Yet another question about HV Maida Regs
  4. Question about vacuum tubes
  5. Scott 299D Calibration
  6. Score! Bag-O-tubes!
  7. Building a tube integrated amp
  8. Audio Note Kits L1 Build...
  9. Need help with old mic amp
  10. Temporary hum
  11. Unidentified Tube - One for the detectives!
  12. Rogues?
  13. What about big tube RV278 Telefunken?
  14. variac variable transformer
  15. Tube amp OPT for Headphone Amp? (impedance matching question)
  16. current needed for 4x50l6 & 3x6sn6
  17. 6N11 tube work at 24V power supply?
  18. Heater voltage 5volt!
  19. help me choose a high end opt for tubelabs SE!
  20. 6L6/807 AB2 triode-- screen drive?
  21. help troubleshooting
  22. Anode Follower Article
  23. ECC802S 12AU7 ECC82 heater question
  24. Books for amplifiers
  25. E180F Preamp
  26. Don Allen Amp's ????
  27. To connect or not to connect..........
  28. Phonostage with tube moving coil
  29. 300b tube Temperature?
  30. Center tap transformer for elevated heater supplies
  31. single ended kt88 fuse blowing after an hour
  32. Radiotron question
  33. suggested use for old telefunken tubes
  34. Using different ouputs for two different drivers
  35. Pete Millett Uniamp with 300b
  36. Cary slp-70
  37. How to combine 2 signals from 2 gain stages
  38. Increase B+ supply
  39. Aikido Tetra Sans Phono PCB
  40. Loadlines and distortion (6S33S/6S41S)
  41. home theatre bypass feature
  42. Doubling the power of hifi tube amplifiers
  43. Can this tube be used in audio amplifier?
  44. 100 V OPT
  45. Help me understand tube chart data
  46. Listening preference....
  47. tube socket legs?
  48. Stand alone gain stage pre-amp
  49. I kinda sorta burned up my K12-G power transformer
  50. RCA-182 Tube Amp
  51. Transformer potting material? what material?
  52. Ultimate 6xEL34 PPP monoblocks? Hopefully with your help :)
  53. tube amp/pre in car?
  54. Thorsten's tube Stage for TDA1541A
  55. Please help me identify these .45 3kv TRW caps
  56. Convert Gates pre-amp to DC filament?
  57. any suggestions for a mid-amp transformer for a hybrid design... like this circuit...
  58. how much C is too much C?
  59. fisher 70AZ
  60. RE: My first attempt at using Tube Cadd
  61. Srpp simple explanation
  62. Driver for a 807 em triode mode...help !!!
  63. 6J6-based SSMH?
  64. Small tube amp based on 6N6P
  65. replacement for Ei 12BH7AEG
  66. Preamp input tube noise
  67. How much is too much for a 6L6GB?
  68. What is the proper way to measure transformer inductance?
  69. Audio Research LS8 mod. to MKII
  70. Futterman stage max input
  71. How important is ESR in PS Caps?
  72. Pushing 6p14p too hard
  73. Who can tell me in Rome where can i buy antique Vacuum tube?
  74. Is the YAQIN MS-12B (220v +-10%) safe to use in UK
  75. Priboi biasing
  76. Whither Westrex ?.
  77. Tube Phono Pre-Amplifiers
  78. Pioneer SA400 -- Headphones hum, speakers don't. Why?
  79. DIY tube amps for surround sounds?
  80. Rotary switch for attenuator
  81. What is Matise circuit?
  82. 6bq5 red plating
  83. Technical questions about Melos MA-333
  84. idiot proof mono push pull 6l6gc schematic wanted
  85. Passive Preamp Mod help
  86. KT77 OPT impedance
  87. i think i'm thru with 2A3 tubes
  88. VTC4U? Is that the name of the tube tower/shroud seller?
  89. 8417 triode el.. Mod??'s
  90. Gramp's Zenith MLT 15
  91. Class A tube amplifier Kit
  92. IERC tube coolers for EL34 on the Bay
  93. Stromberg Carlson ASR 433
  94. quads11&22 back into service
  95. New Tubes for sale
  96. Best design for Lundahl LL1679/PP
  97. 12U7 LTP vs. 6922 cascode
  98. Need help calculating value of balancing resistors
  99. 12ax7 12au7 preamp
  100. Western Electric 471A...any information ?
  101. Please Reply
  102. tube line preamplifier circuit
  103. 6L6 Ultralinear cathode Follower
  104. Grid current operation
  105. 431 based screen supply
  106. Where did all the money go?
  107. Hyperx soft start any good for valve amp situation?
  108. Class AB2, Class B, and Hifi
  109. PP 6b4g bad / distorted channel diagnostics
  110. Transformer usage ??
  111. Phono Amplifier
  112. Need EL84 Brand Identification
  113. RCA Octagon dating
  114. Most Accurate Bias Testing Method
  115. ASL AQ1003DT schematic or manual?
  116. Penta brand 6L6GC info?
  117. Mod to SE 6SN7 - 6V6 amp
  118. adjust filament ECC82/83
  119. Clear out of old valves - advice needed
  120. Help ID this OPT
  121. Help? 6n23p cathode follower
  122. DC Heater Caps
  123. Load Line and Biasing for Class AB 6550 power amp
  124. Amp project help needed
  125. LTP with CCS and feedback
  126. Clarion simple 2A3 amplifier
  127. Another question about plate curves and pentode load lines
  128. 5V Indrect Heated Rectifiers?
  129. Easy CCS
  130. I just setup my mimiwat n3 with a pair of Energy cb-20 speakers
  131. First watt F2/little dot MK III
  132. Old Motorola console tube amp, fuse problem
  133. How much performance difference w/ this config?
  134. 6P8S datasheet, help !!
  135. DHT IMD
  136. How to calculate OPT transformer windings
  137. Newbie Questions
  138. Building a Harmonic Distortion Generator
  139. plate curves and max ratings questions
  140. Heater-cathode DC conduction resistance
  141. EL 84 Capacitor Equivalent
  142. How do they get away with this?
  143. well-loved Sherwood "popping" prob mouse pee
  144. Tube Newb: 12sn7 and 12sl7 interchangeable?
  145. Totem-Pole OTL with 6c33c tubes and 0.079 % THD at 20 Watt
  146. sonic frontiers sfm-75
  147. Chinese tube amp mods?
  148. PSU for JE Labs Simple 45/2A3
  149. frustrated ,Bought a 845 NOS - springs are discconnected need help
  150. Running water sound in amp
  151. Peerless 16458 output transformers
  152. Noisy high-gain preamplifier
  153. Cheap ($235) SE Tube amp kit, transformer and chassis on ebay
  154. 2A3 single plate RCA/Cunningham tube prices
  155. output transformer power rating
  156. Rectifier Foward Voltage?
  157. Help With 6Y6 amp
  158. What are 12AT7/ECC81 power drivers ?
  159. Help with these Russian GU50 tube amplifier
  160. Eico ST-70 Supermods
  161. Mullard PZ30, how's its Peak Inverse Voltage?
  162. 12AU7 in cascode configuration
  163. Bad tube in old record player?
  164. check this out glas-fiber cartridge
  165. cathode caps
  166. Aikido HV PSU
  167. Distance between 6N23P and a cap?
  168. solid and strand wire in amp
  169. Phillips Music Sudio
  170. LTPI Grid stopper value affect on harmonics
  171. WTF. What's going on here.
  172. 7-pin pcb mount socket with shield?
  173. SIMPLE remote volume control with alps motorized pot
  174. Hybrid Partial Feedback SE Amplifier
  175. HV +B Connector
  176. Eico experts needed: PEC in 2050 driver stage bad
  177. Best sounding linestage/buffer topology?
  178. Using ECC88
  179. what tubes should I upgrade a mini watt with I currently have the stock 6p14 and 6bq5
  180. EL34 cathode bias PA
  181. Tube Amp Art
  182. Quick OT Question
  183. Power Transformer
  184. ampex 354? some questions
  185. Good power Filter Capacitors
  186. Fisher 101d blow fuse
  187. Jolida 502A lost output...?
  188. Codename "Tapyrus", my ongoing DIY headphone amp
  189. RIAA preamp with DHTs
  190. Dynaco Mark VI feedback values
  191. Eagle PCB
  192. Ode to Tube Rollers
  193. switching tubes: good or bad idea?
  194. COnn Organ Amp DI266 Info 12v6GT tubes
  195. Please help me figure out why my plate voltage is too high here
  196. Yaqin MC10L Question for the Guru's
  197. PP PSU: How much ripple is too much ripple?
  198. Bypass caps in choke PS
  199. Grounded Grid TRANSCENDENT line stage
  200. Battery Powered Tube Amp
  201. 5Z4PJ 6N2J
  202. Almost there! opinions are welcomed(6C33SET)
  203. Speaker impedance and amp matching?
  204. r core or toroidal output trafo for dynaco st70
  205. Heathkit Returns
  206. How to get started
  207. WANTED: schematic for Eico 2050 Classic Series
  208. winding an output transformer
  209. 12AX7 vacuum tube pre-amp?
  210. motor 'defeat' switch for echoplex/etc
  211. Audionote kit L4 and L6
  212. class a audio amplifier 5w with ic ne5532
  213. Fate of my Heathkit W7-M amplifiers
  214. Trying to get my B&K 500 up and running.
  215. Tubelab simple SE ideas
  216. Newcomb E-10B Amplifer
  217. Telefunken RV218 power triode
  218. Crowhurst High Power vs Low Power Amplifiers
  219. Duncan amps PSU designer II help
  220. damper diodes
  221. EL12N in JCM800 clone
  222. Amp design exercise, mentorship needed...
  223. Need help with series filament 25l6GT amp
  224. Dynakit Mark IV Oscillation
  225. Telefunken C3M data
  226. Can a tube guru help with nu>lambda conversions?
  227. plate dissipation vs brand
  228. Solid-state replacements for PAS2/3 rectifiers?
  229. first integrated amp
  230. Problems with Unbalanced to Balanced line matching transformer from EDCOR
  231. st70A mod.kit
  232. Grampian 600u
  233. Suggest amp to drive mangnapan SMGa/MMG
  234. Valve DI box
  235. Yaqin Tube Amplifier
  236. Jensen JT-11P-1 on tube amp input
  237. Amperex PQ 6922 code decifering?
  238. 12ax7 driving a DHT out, why not?
  239. unknown Rogers Pre Power
  240. Mic pre question
  241. power tube power scaler
  242. Tube Rectifier with transformer without Center tap
  243. Can I use this stuff (does it have any value?)
  244. Full regulated power supply for 12au7(preamp)
  245. 6C33 OTL Circlotron
  246. Ammeter connection for Tubelab SE
  247. Unknown output transformer
  248. Building a tube pre/amp copy (6V6)
  249. 6922 pin i.d.
  250. KT88 Push Pull Amp using transistor driver stage

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