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  1. Yet another resistor thread
  2. Bogen CHB100 Valve Question
  3. 1st build; Adding load to PT secondary
  4. need help RCA RS 199C
  5. Unusually high Gm
  6. RH84 motorboating, stereo vs mono
  7. Use a tube rectifier for grid bias voltage, AA5 Radio tubes and usage.
  8. Cathode bypass with Long tail pair
  9. new chinese tube manufacturer
  10. Black Gate WKZ - can they be used in these circuits?
  11. Yet another question about HV Maida Regs
  12. Question about vacuum tubes
  13. Scott 299D Calibration
  14. Score! Bag-O-tubes!
  15. Building a tube integrated amp
  16. Audio Note Kits L1 Build...
  17. Need help with old mic amp
  18. Temporary hum
  19. Unidentified Tube - One for the detectives!
  20. Rogues?
  21. What about big tube RV278 Telefunken?
  22. variac variable transformer
  23. Tube amp OPT for Headphone Amp? (impedance matching question)
  24. current needed for 4x50l6 & 3x6sn6
  25. 6N11 tube work at 24V power supply?
  26. Heater voltage 5volt!
  27. help me choose a high end opt for tubelabs SE!
  28. 6L6/807 AB2 triode-- screen drive?
  29. help troubleshooting
  30. Anode Follower Article
  31. ECC802S 12AU7 ECC82 heater question
  32. Books for amplifiers
  33. E180F Preamp
  34. Don Allen Amp's ????
  35. To connect or not to connect..........
  36. Phonostage with tube moving coil
  37. 300b tube Temperature?
  38. Center tap transformer for elevated heater supplies
  39. single ended kt88 fuse blowing after an hour
  40. Radiotron question
  41. suggested use for old telefunken tubes
  42. Using different ouputs for two different drivers
  43. Pete Millett Uniamp with 300b
  44. Cary slp-70
  45. How to combine 2 signals from 2 gain stages
  46. Increase B+ supply
  47. Aikido Tetra Sans Phono PCB
  48. Loadlines and distortion (6S33S/6S41S)
  49. home theatre bypass feature
  50. Doubling the power of hifi tube amplifiers
  51. Can this tube be used in audio amplifier?
  52. 100 V OPT
  53. Help me understand tube chart data
  54. Listening preference....
  55. tube socket legs?
  56. Stand alone gain stage pre-amp
  57. I kinda sorta burned up my K12-G power transformer
  58. RCA-182 Tube Amp
  59. Transformer potting material? what material?
  60. Ultimate 6xEL34 PPP monoblocks? Hopefully with your help :)
  61. tube amp/pre in car?
  62. Thorsten's tube Stage for TDA1541A
  63. Convert Gates pre-amp to DC filament?
  64. any suggestions for a mid-amp transformer for a hybrid design... like this circuit...
  65. how much C is too much C?
  66. fisher 70AZ
  67. RE: My first attempt at using Tube Cadd
  68. Srpp simple explanation
  69. Driver for a 807 em triode mode...help !!!
  70. 6J6-based SSMH?
  71. Small tube amp based on 6N6P
  72. replacement for Ei 12BH7AEG
  73. Preamp input tube noise
  74. How much is too much for a 6L6GB?
  75. What is the proper way to measure transformer inductance?
  76. Audio Research LS8 mod. to MKII
  77. Futterman stage max input
  78. Pushing 6p14p too hard
  79. Who can tell me in Rome where can i buy antique Vacuum tube?
  80. Is the YAQIN MS-12B (220v +-10%) safe to use in UK
  81. Priboi biasing
  82. Whither Westrex ?.
  83. Tube Phono Pre-Amplifiers
  84. Pioneer SA400 -- Headphones hum, speakers don't. Why?
  85. DIY tube amps for surround sounds?
  86. Rotary switch for attenuator
  87. What is Matise circuit?
  88. 6bq5 red plating
  89. Technical questions about Melos MA-333
  90. idiot proof mono push pull 6l6gc schematic wanted
  91. Passive Preamp Mod help
  92. KT77 OPT impedance
  93. i think i'm thru with 2A3 tubes
  94. VTC4U? Is that the name of the tube tower/shroud seller?
  95. 8417 triode el.. Mod??'s
  96. Gramp's Zenith MLT 15
  97. Class A tube amplifier Kit
  98. IERC tube coolers for EL34 on the Bay
  99. Stromberg Carlson ASR 433
  100. quads11&22 back into service
  101. New Tubes for sale
  102. Best design for Lundahl LL1679/PP
  103. 12U7 LTP vs. 6922 cascode
  104. Need help calculating value of balancing resistors
  105. 12ax7 12au7 preamp
  106. Western Electric 471A...any information ?
  107. Please Reply
  108. tube line preamplifier circuit
  109. 6L6 Ultralinear cathode Follower
  110. Grid current operation
  111. 431 based screen supply
  112. Where did all the money go?
  113. Hyperx soft start any good for valve amp situation?
  114. Class AB2, Class B, and Hifi
  115. PP 6b4g bad / distorted channel diagnostics
  116. Transformer usage ??
  117. Phono Amplifier
  118. Need EL84 Brand Identification
  119. RCA Octagon dating
  120. Most Accurate Bias Testing Method
  121. ASL AQ1003DT schematic or manual?
  122. Penta brand 6L6GC info?
  123. Mod to SE 6SN7 - 6V6 amp
  124. adjust filament ECC82/83
  125. Clear out of old valves - advice needed
  126. Help ID this OPT
  127. Help? 6n23p cathode follower
  128. DC Heater Caps
  129. Load Line and Biasing for Class AB 6550 power amp
  130. Amp project help needed
  131. LTP with CCS and feedback
  132. Clarion simple 2A3 amplifier
  133. Another question about plate curves and pentode load lines
  134. 5V Indrect Heated Rectifiers?
  135. Easy CCS
  136. I just setup my mimiwat n3 with a pair of Energy cb-20 speakers
  137. First watt F2/little dot MK III
  138. Old Motorola console tube amp, fuse problem
  139. How much performance difference w/ this config?
  140. 6P8S datasheet, help !!
  141. DHT IMD
  142. How to calculate OPT transformer windings
  143. Newbie Questions
  144. Building a Harmonic Distortion Generator
  145. plate curves and max ratings questions
  146. Heater-cathode DC conduction resistance
  147. EL 84 Capacitor Equivalent
  148. How do they get away with this?
  149. well-loved Sherwood "popping" prob mouse pee
  150. Tube Newb: 12sn7 and 12sl7 interchangeable?
  151. Totem-Pole OTL with 6c33c tubes and 0.079 % THD at 20 Watt
  152. sonic frontiers sfm-75
  153. Chinese tube amp mods?
  154. PSU for JE Labs Simple 45/2A3
  155. frustrated ,Bought a 845 NOS - springs are discconnected need help
  156. Running water sound in amp
  157. Peerless 16458 output transformers
  158. Noisy high-gain preamplifier
  159. Cheap ($235) SE Tube amp kit, transformer and chassis on ebay
  160. 2A3 single plate RCA/Cunningham tube prices
  161. output transformer power rating
  162. Rectifier Foward Voltage?
  163. Help With 6Y6 amp
  164. What are 12AT7/ECC81 power drivers ?
  165. Help with these Russian GU50 tube amplifier
  166. Eico ST-70 Supermods
  167. Mullard PZ30, how's its Peak Inverse Voltage?
  168. 12AU7 in cascode configuration
  169. Bad tube in old record player?
  170. check this out glas-fiber cartridge
  171. cathode caps
  172. Aikido HV PSU
  173. Distance between 6N23P and a cap?
  174. solid and strand wire in amp
  175. Phillips Music Sudio
  176. LTPI Grid stopper value affect on harmonics
  177. WTF. What's going on here.
  178. 7-pin pcb mount socket with shield?
  179. SIMPLE remote volume control with alps motorized pot
  180. Hybrid Partial Feedback SE Amplifier
  181. HV +B Connector
  182. Eico experts needed: PEC in 2050 driver stage bad
  183. Best sounding linestage/buffer topology?
  184. Using ECC88
  185. what tubes should I upgrade a mini watt with I currently have the stock 6p14 and 6bq5
  186. EL34 cathode bias PA
  187. Tube Amp Art
  188. Quick OT Question
  189. Power Transformer
  190. ampex 354? some questions
  191. Good power Filter Capacitors
  192. Fisher 101d blow fuse
  193. Jolida 502A lost output...?
  194. Codename "Tapyrus", my ongoing DIY headphone amp
  195. RIAA preamp with DHTs
  196. Dynaco Mark VI feedback values
  197. Eagle PCB
  198. Ode to Tube Rollers
  199. switching tubes: good or bad idea?
  200. COnn Organ Amp DI266 Info 12v6GT tubes
  201. Please help me figure out why my plate voltage is too high here
  202. Yaqin MC10L Question for the Guru's
  203. PP PSU: How much ripple is too much ripple?
  204. Bypass caps in choke PS
  205. Grounded Grid TRANSCENDENT line stage
  206. Battery Powered Tube Amp
  207. 5Z4PJ 6N2J
  208. Almost there! opinions are welcomed(6C33SET)
  209. Speaker impedance and amp matching?
  210. r core or toroidal output trafo for dynaco st70
  211. Heathkit Returns
  212. How to get started
  213. WANTED: schematic for Eico 2050 Classic Series
  214. winding an output transformer
  215. 12AX7 vacuum tube pre-amp?
  216. motor 'defeat' switch for echoplex/etc
  217. Audionote kit L4 and L6
  218. class a audio amplifier 5w with ic ne5532
  219. Fate of my Heathkit W7-M amplifiers
  220. Trying to get my B&K 500 up and running.
  221. Tubelab simple SE ideas
  222. Newcomb E-10B Amplifer
  223. Telefunken RV218 power triode
  224. Crowhurst High Power vs Low Power Amplifiers
  225. Duncan amps PSU designer II help
  226. damper diodes
  227. EL12N in JCM800 clone
  228. Amp design exercise, mentorship needed...
  229. Need help with series filament 25l6GT amp
  230. Dynakit Mark IV Oscillation
  231. Telefunken C3M data
  232. Can a tube guru help with nu>lambda conversions?
  233. plate dissipation vs brand
  234. Solid-state replacements for PAS2/3 rectifiers?
  235. first integrated amp
  236. Problems with Unbalanced to Balanced line matching transformer from EDCOR
  237. st70A mod.kit
  238. Grampian 600u
  239. Suggest amp to drive mangnapan SMGa/MMG
  240. Valve DI box
  241. Yaqin Tube Amplifier
  242. Jensen JT-11P-1 on tube amp input
  243. Amperex PQ 6922 code decifering?
  244. 12ax7 driving a DHT out, why not?
  245. unknown Rogers Pre Power
  246. Mic pre question
  247. power tube power scaler
  248. Tube Rectifier with transformer without Center tap
  249. Can I use this stuff (does it have any value?)
  250. Full regulated power supply for 12au7(preamp)

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