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  1. Needed: transformer core materials cobalt nickel
  2. Anybody from Italy - please help
  3. Bogen AP35 amp problem
  4. Question about a VR screen supply
  5. DIY Amp Contest in Japan
  6. Hot 5AR4/GZ34 arcing on powerup surge?
  7. Rh84 Ptx
  8. Buzz. Grounding-related?
  9. 50/60Hz Hum - Your Expert Opinion Please
  10. Static Gm test
  11. High Voltage negative regulators
  12. where do i find old tube car radio schematics?
  13. Burned Up Transformer in HiFi 6p3p Tube Amplifier
  14. capacitors
  15. Wire Types
  16. Weird EH12AY7 Problem
  17. Pot and knob compatability
  18. ECC8100 and ECC2000
  19. DHT experts, i need your help
  20. transformers
  21. Vetruvio class-A
  22. PP to balanced input
  23. KT88 AB2 Experiences
  24. Group buy pulse check for Pete Millett tube crossover PCB
  25. Calculating operating point of a DHT
  26. upgrades, mods to JADIS JA-200, JPS2 and JPS3
  27. McIntosh MC-3500 Schematic Information
  28. Use 2X SE output transformers fo 1x PP
  29. 12B4a spice model.
  30. Help identifying a capacitor
  31. recommended a tube amp for Celestron Studio Ditton 66's
  32. Help needed with bias circuit
  33. 220 Mega Ohm Resistor - Really
  34. How to bias DH dual triodes?
  35. Any of these tubes good for audio applications?
  36. DIY AN M7 need help !!!
  37. Need schematic for Bell 2420 amp
  38. new SimpleSE build
  39. My Citation II Rebuild
  40. KT88 cathode resistors?
  41. Dynaco ST35 boards
  42. Triode strapping a 6V6 (or any tetrode/pentode, really)
  43. ECC 83 + ELL 80 maybe?
  44. need amp suggestions please.
  45. Phase splitter which tube?
  46. WANTED: 12B4A tubes
  47. re-stacking an output transformer
  48. A directly heated triode or Pentode SE amp on a Budget
  49. Annoying high frequency ringing from my 832 tube amp
  50. 30 Amp Knobs
  51. A question about audio interconnects for the ones here with such knowledge.
  52. Hi-end GM70 amplifier with only 2 stages
  53. Paragon
  54. Simple SE with CCS and fixed bias
  55. Idea(s) for simple HV regulated psu
  56. NOS Philips "miniwatt/dario" tubes
  57. Hybrid Class D with 6n6p tubes
  58. Any ideas how to estimate VA or mA of Power Tranny
  59. 6L6 Grid resistors??
  60. HeathKit W-2: Missing Tube
  61. Edcor CXSE25-8-5K Dimensions
  62. Bias Pots
  63. Negative Feedback
  64. scott 299D output transformers?
  65. chocke anode load, please explain me..
  66. Integrated HiEnd Amp
  67. Looking for advice/tips regarding simple SE amplifer
  68. Tube amps from vintage RTR's?
  69. componet upgrade
  70. What is "AA" ?
  71. question about twin triode tubes
  72. Building a preamp - somewhat new to tubes
  73. need some guidance about tube amplifiers
  74. Blackgate FK 10000 uF ??
  75. PT failure dangers
  76. Outer foil k40y-9
  77. sansui 1000a maintenance
  78. filter cap question
  79. add UL tap for 125ese
  80. Bogen D070 Amp - HELP w/ INFO.
  81. Humming asl 2004dt wave pre amp
  82. Cany anyone supply any info. about this amplifier?
  83. Low voltage 845SE with 300B driver
  84. Cabinet Help!!!!
  85. dc heater supply help
  86. gu-29 tube
  87. LTP question
  88. Over 500V rated electrolytics?
  89. Fireplug? (inline fuse)
  90. Help! Flash-over on my amp :-(
  91. 6550 drive question
  92. 4211D Amp?
  93. Please, reccomand me about 7233 GE NOS
  94. Help! Schematic Conrad Johnson Premier 3
  95. Tubelab SE in parallel?
  96. Just an Idea?
  97. Tried this out, but needs more gain. . .
  98. EL34 Power Stage
  99. Daven Question
  100. How many rectifiers can have mesh plates?
  101. Real Quick Question!!
  102. Wattage of vintage resistors ?
  103. What is the signal path -- the red line?
  104. Hi-end definitive vacuum tube phono pre
  105. Resistors for Stepped Attenuator
  106. dual rectifier clone....
  107. Motorola Console Salvage
  108. single endedtransformer coupled 6sn7 mic preamp
  109. Brett's 12B4 schematic?
  110. insulated turret terminals
  111. Building first tube power amplifier, reccomendations?
  112. Can you use a MOSFET as a cathodyne
  113. Resolving cold midrange in 5687 circuit
  114. 829B SE Comments????
  115. Shielding and regulator location in the KTA 26 preamp
  116. Voice of music, antique or reproduction?
  117. Quick Question - Audio Note M1 or AR SP-6?
  118. Red Light District/Baby Huey (EL84 P-P) Output Iron
  119. help with PSE design
  120. Tantalum VS CC & metalfilm
  121. Rise-time question
  122. Have an odd problem with my Aikido.
  123. Weird Hybrid Splitter (equal impedances?)
  124. Tube 6550 to test
  125. Using semiconductor curvetracer for tubes...
  126. Question regarding 3rd wire grounding and safety
  127. Plate Current VS Plate Voltage Graphs
  128. Toggle Switch Contact Type and Rating
  129. Inside information on Shuguang
  130. 6N6P vs. 6N6P-I
  131. Technical Survey Paper -- Need Some Help!
  132. VOLTAGE DOUBLER : drop in current?
  133. Using genetic algorithms to optimize pentode parameters
  134. Favorite size wire for signal wiring?
  135. Any idea what this thing is?
  136. Breadboarding Poindexter's 6GK5/EL34 Music Machine
  137. anyone ever use el86/6cw5?
  138. bad 5ar4?
  139. 6DJ8 biasing question
  140. Is it worth using anything other than DHTs for preamps?
  141. Billington Export Ltd Tubes?
  142. 845SE : comments on this circuit?
  143. Tip-Restoring Vintage Pot
  144. B+ Delay - Is this a problem?
  145. Toroids in SET
  146. I have to sell my Pyramid-V prototype...
  147. Stealing a preamp
  148. OLD GOLD, or something I can dissassemble and use
  149. CF PP design
  150. Preamp Idea
  151. Metal Oxide Screen Stoppers
  152. Splitting up power supply inductance
  153. Back to Back transformers and safety ground
  154. Vintage tube tester
  155. 7 pin ECC81.
  156. 26 Driver Tube for 45 - Operating Points
  157. My New pre-amplifier£¡
  158. Echocord Super Question
  159. High quality matching panel meters?
  160. 6BY5GA question
  161. Seeking schematic for Conn organ amp
  162. Will this work as a differential stage?
  163. Tube ID and suggestions
  164. 6L6 to EL34 conversion
  165. my saturation test ??
  166. DO-35 diode inside vacuum tube ?
  167. Transformer Polarity
  168. Where to go for tube gear in Hong Kong?
  169. EL84 Shunt reg for pre-amp, 85A1?
  170. Tube Preamp Idea
  171. UTC Linear Standard High Level matching transformers
  172. Manley Compact 160w noise problem -please help
  173. D3a Experimenters Breadboard Project
  174. Dtmm
  175. Running Single Ended 6V6 in Triode Mode
  176. 6v6pp Finished
  177. Stereo Buffer with a single twin triode
  178. Anybody recognize this pentode?
  179. Original schemes of amplifiers for 45 tubes of 1920 and 1930 years?
  180. My new amplifier£_300BSE!
  181. low zout vs output transfo
  182. can't find valve art tube - and glowey tube pic
  183. Which Phono Pre???
  184. BB 1702 DAC + transformer I/V ?
  185. aikido build thread-
  186. Triode Connected 6BK5
  187. need help in building tube amplifier 10 watter
  188. Parasitic oscillations in general
  189. Help Russian tube experts.
  190. forced aircooling
  191. Dirty Cheap Vintage Pot Fix - Your Opinion Please
  192. ask jan first
  193. running 6S4S/6C4C hot .. calling widowmaker
  194. Covi Mark II OTL Help
  195. Volume pot between triodes?
  196. Series Pass Transistor for TL-783
  197. Anyone else have the new Mullard EL34's?
  198. VR tubes in single ended circuits
  199. Transformer for Tube Amps?
  200. "Magga Amp Workshop" builds again (Simple 45 Project)
  201. How to handle Reclaimed Transformers
  202. Dual supply...
  203. How much would this cost/how complicated would this be...
  204. low cost DHT hum pots vendors?
  205. Tube Buffer – question?
  206. Bogen CHB 10A questions
  207. 12B4 Preamp
  208. adding output tubes etc to pre amp
  209. primaluna dialogue 5 and fanboys?
  210. yaqin mc-100b
  211. KT88 in place of 6550?
  212. Tube manaul data sheets
  213. Need a bias supply how??
  214. Wouldn't you just love to have these!. United Electronics 211's
  215. Using single tube of Dual
  216. 21st century tube? Non-Vacuum
  217. making two minibloks for stereo
  218. Lynn Olson Raven Question
  219. Inrush current limiting heater filaments
  220. Tube amp with "meter"?
  221. lytics and choke AFTER regulator
  222. Boosing the power of your existing amp.
  223. Component ID from a 50EH5 Amp
  224. Music Angel KT88 Bridged /Bias problem
  225. Output of preamp drops when overdriven
  226. Choke load calculation...
  227. 807 SE amp schematic
  228. DC Heater Voltage
  229. Choke loading vs. SRPP
  230. Unloaded Power Transformer Current Draw/Janus-Aikido snipet
  231. Need help with tubed output for PCM1793 DAC
  232. Single ended transformer grounding question
  233. Reforming Caps with Variac
  234. First Shot at a 41 SE amp
  235. [Question] Ground Error?
  236. TOMIKO OPT-SE, any good?
  237. 6550 Williamson - Low Bass Response...
  238. Preamp design question
  239. Reading Oscilloscope Traces -For Dummies
  240. Power Supply Question
  241. Altec 1568A modifications for comments and help…. again
  242. H & K Tube 20 unruly gain
  243. Electro-Harmonix interview
  244. Using LED bias for 4.5 mA cathode current, is it a good idea?
  245. amp dead?
  246. 7189 vs EL84 +458v plate
  247. What does your Aikido drive?
  248. Help with Decware SE84 Kit!
  249. Hybrid Amplifier in Small cases
  250. audio mixer with tubes?

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