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  1. k12-m amp not working
  2. 813 amp and old choke
  3. Several hundred tubes found! What to do!
  4. Possible to convert Audiorom Fu29 to Single end?
  5. Measuring bias
  6. ecc802s SRPP preamplifier
  7. HELP! Capacitor specs for Sonic Frontiers SFC-1 Control Amplifier
  8. Class A KT88 info
  9. What is screen tap of transformer?
  10. Brightest heaters in tubes?
  11. 40% tap or not
  12. 6dj8 phono schematic needed
  13. EL34 Parts..
  14. solid state driven p-p ultralinear
  15. linestage w/separate PSU: where to "split" ?
  16. Anybody know this TELEFUNKEN SE transformer?
  17. Too much feedback?
  18. Tube Power Supply Dummy Load
  19. For 6c33 Fans. A new schematic
  20. WAD phono 3 motorboating with Raphaelite 300b
  21. Help! Tube Tester in Austin or Lago Vista?
  22. Vintage Stromberg Carlson
  23. GM70 and Other LTSpice Tube Models
  24. Please help me understand this feedback
  25. Affordable Valve Company - Re-bias
  26. The effect of different value coupling capacitors?
  27. Closed loop stability help needed.
  28. EAR 509 OPT Impedances
  29. Installing Hammond 1609s in K12-G
  30. 6088 Amplifier
  31. Valve Art kt88 not the same ring getter?
  32. 5mA DC transformer - tube output stage?
  33. Mini amp questions
  34. What mean those russian electronic units ?
  35. Coupling capacitors
  36. Monsters thread (high power tube amps)
  37. CCS on LTP please help
  38. Best type of pre-amp for valve/tube power amp
  39. 12au7 made by Toshiba, Hitachi, Matsushita, RSD, International and Miniwatt?
  40. Load lines
  41. Cold cathode tubes
  42. Redundant CNC stainless steel enclosures
  43. First try P-P 6S41S design
  44. Help!!! I need to get valve TAW12/20B / TRIODE for use as HF amplifier and oscillator
  45. Velleman K4040 Stereo Vacuum Tube Amplifier Volume Control
  46. 12AT7 Regulated Power Supply
  47. 2A3 to 45 Cathode Wattage?
  48. Cheap Chinese Ebay Amps
  49. Audion Sterling Integrated Amp Version - Stereo MK-I - Extended Live Time wanted
  50. Transformer Center Taps
  51. Output transformer for 18watt
  52. PTX temps
  53. Can A valve amplifier be both Class A and Class B?
  54. got a problem with my scope, need some advice
  55. DC coupled cathode follower driving me nuts
  56. Vacuum state gone?
  57. 1634 dual triode
  58. Aikido line amp
  59. Winding an ISO TX with pair of inductors
  60. Quad II Switch Mode PSU
  61. What do do with all of these?
  62. global negative feedback in el84 push pull
  63. Old HP transformer - what is it?
  64. FET Phase inverter to drive valve PA
  65. Core Audio 6BC4 buffer problem
  66. JCM Build - Voltage problem!
  67. Power Amplifiers & Gain
  68. Power tube maximum current draw from a power supply
  69. Tube Matching in a Power Amp?
  70. SE stereo / PP mono block schematic choices
  71. How to measure output transformer?
  72. Peavey VTM 60 vs Orange Tiny Terror
  73. Shoddy Packaging
  74. Schematic needed for Manley SnapperŪ from Manley Labs
  75. Resistor, capacitor across output transformer AKAI M-7
  76. eBay&etc cheap tube buffers/preamp .. anything good?
  77. 6N3 Preamp Question
  78. OK guys...be gentle
  79. 6SN7 and DN2540's
  80. 10k and 6k primary windings on OPT. Use for UL?
  81. Settings for PL509, EZ80 tubes on 539c tester
  82. replacing 6LGC with 6550 or KT88
  83. ECC83 input circuitry
  84. Dynaco MK III modifications
  85. SMPS for heaters
  86. Headphone tube-amp with oddball OPT
  87. Neon Lamp Question
  88. Curious old tubes from tandy
  89. 828 Triode Curves?
  90. 813 review
  91. tube circlotron for headphone amplifier
  92. valve headphone pre-amp
  93. Shengyi 6AQ5
  94. Burn in small signal tubes?
  95. 24V powered 6N11 amplifier, 0.25% distortion, pretty good!
  96. SS diode replacements
  97. Bass guitar amp using 832a/GU32 tubes
  98. can you check if everything is ok with el84 schematic please
  99. Advice on this amp schematic please
  100. 8156's
  101. Can't get anything from my new pre-amp
  102. Bottlehead Paramount Question
  103. need help with ac/dc am/fm radio
  104. Peculiar oscillation
  105. ECC83 settings for Taylor 45C
  106. New Jolida 302b amp owner questions
  107. Help with gyrator
  108. Some basic questions...
  109. I have a hard one for you guys
  110. CCS pulsing oscillation problem
  111. tube testers: different gM standards for same tube?
  112. Frank's Pre Still In Vogue?
  113. Home made tube amps
  114. Source for SED "winged C" tubes?
  115. Preamp Help
  116. Push Pull Class A
  117. Multi-Ways Output Transformers
  118. Redplating anomaly?
  119. Marshall JCM900 2500 preamp
  120. Just for fun power poll!
  121. BIASING A JADIS ORCHESTRA
  122. Yaqin MC-50L
  123. CJ PV5 Upgrades?
  124. New Member - Magnavox Amps
  125. Double parafeed
  126. 6550 grid characteristic help please
  127. Newbie- Tube Testing RF Amp tube
  128. Urgent:Wrongly order 220V Power supply for 230V enviroment
  129. Mono sub-out from one trafo?
  130. Mu Follower to drive a Push-Pull Amplifier?
  131. The 6934A Triode Tube
  132. Constant current sink for 6SN7
  133. 6V6 high voltage
  134. VTL deluxe 100 monoblk (KT88) need help?
  135. Va,Ia exeed limiting values in datasheeds ?
  136. Old DIYtube ST-35 electrolytics - swap?
  137. What Hammond for UK?
  138. What would you build with this transformer set?
  139. EL86 / 6CW5 + 6BQ7A amp design
  140. Western Electric theater amplifiers; how to hook them up?
  141. 12AU7,12B4A PSE schematic needs finishing!
  142. Dual grid and plate pins
  143. Best sounding ECC83 ?
  144. tube output for Playstation 1
  145. 6GX8 as Audio Level Indicator?
  146. Wurlitzer 6150 Organ Tube Amp convert Guitar Amp
  147. help on 12AU7 Preamp circuit
  148. Anyone bought tubes from http://www.nostubestore.com/ ?
  149. Tube pre-amp with exposed tubes?
  150. Using low voltage lamp in power supply
  151. GU 50 monoblock
  152. KT-88 Push Pull with CFB
  153. 12AX7 + ?? Ideas 2A3 // 6L6
  154. Formula for driver current requirement ?
  155. Need a little help with a regulator circuit if you are willing.
  156. Troubleshooting help for 12AQ5 amp
  157. Can anyone help with an ef86 tape preamp mod please?
  158. Herald Amp
  159. To switch B+ or not?
  160. All-tube vs tube/mosfet hybrid ?
  161. 6c33c-b question
  162. 12AT7 substitutes?
  163. 1st project salvaged sears receiver iron need good amp schematic
  164. FM-3 ? About parts replacement in IF stages
  165. simple EL84 parallel?
  166. Finished: Claus Byrtih EL34 amplifier on Isophon BS35 speaker set
  167. Yet another resistor thread
  168. Bogen CHB100 Valve Question
  169. 1st build; Adding load to PT secondary
  170. need help RCA RS 199C
  171. Unusually high Gm
  172. RH84 motorboating, stereo vs mono
  173. Use a tube rectifier for grid bias voltage, AA5 Radio tubes and usage.
  174. Cathode bypass with Long tail pair
  175. new chinese tube manufacturer
  176. Black Gate WKZ - can they be used in these circuits?
  177. Yet another question about HV Maida Regs
  178. Question about vacuum tubes
  179. Scott 299D Calibration
  180. Score! Bag-O-tubes!
  181. Building a tube integrated amp
  182. Audio Note Kits L1 Build...
  183. Need help with old mic amp
  184. Temporary hum
  185. Unidentified Tube - One for the detectives!
  186. Rogues?
  187. What about big tube RV278 Telefunken?
  188. variac variable transformer
  189. Tube amp OPT for Headphone Amp? (impedance matching question)
  190. current needed for 4x50l6 & 3x6sn6
  191. 6N11 tube work at 24V power supply?
  192. Heater voltage 5volt!
  193. help me choose a high end opt for tubelabs SE!
  194. 6L6/807 AB2 triode-- screen drive?
  195. help troubleshooting
  196. Anode Follower Article
  197. ECC802S 12AU7 ECC82 heater question
  198. Books for amplifiers
  199. E180F Preamp
  200. Don Allen Amp's ????
  201. To connect or not to connect..........
  202. Phonostage with tube moving coil
  203. 300b tube Temperature?
  204. Center tap transformer for elevated heater supplies
  205. single ended kt88 fuse blowing after an hour
  206. Help getting more gain from a Peavey Butcher
  207. Radiotron question
  208. suggested use for old telefunken tubes
  209. Using different ouputs for two different drivers
  210. Pete Millett Uniamp with 300b
  211. Cary slp-70
  212. How to combine 2 signals from 2 gain stages
  213. Increase B+ supply
  214. Aikido Tetra Sans Phono PCB
  215. Loadlines and distortion (6S33S/6S41S)
  216. home theatre bypass feature
  217. Doubling the power of hifi tube amplifiers
  218. Can this tube be used in audio amplifier?
  219. 100 V OPT
  220. Help me understand tube chart data
  221. Listening preference....
  222. tube socket legs?
  223. Stand alone gain stage pre-amp
  224. I kinda sorta burned up my K12-G power transformer
  225. RCA-182 Tube Amp
  226. Transformer potting material? what material?
  227. Ultimate 6xEL34 PPP monoblocks? Hopefully with your help :)
  228. tube amp/pre in car?
  229. Thorsten's tube Stage for TDA1541A
  230. Please help me identify these .45 3kv TRW caps
  231. Convert Gates pre-amp to DC filament?
  232. any suggestions for a mid-amp transformer for a hybrid design... like this circuit...
  233. how much C is too much C?
  234. fisher 70AZ
  235. RE: My first attempt at using Tube Cadd
  236. Srpp simple explanation
  237. Driver for a 807 em triode mode...help !!!
  238. 6J6-based SSMH?
  239. Small tube amp based on 6N6P
  240. replacement for Ei 12BH7AEG
  241. Preamp input tube noise
  242. How much is too much for a 6L6GB?
  243. What is the proper way to measure transformer inductance?
  244. Audio Research LS8 mod. to MKII
  245. Futterman stage max input
  246. How important is ESR in PS Caps?
  247. Pushing 6p14p too hard
  248. Who can tell me in Rome where can i buy antique Vacuum tube?
  249. Is the YAQIN MS-12B (220v +-10%) safe to use in UK
  250. Priboi biasing

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