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  1. 7591 is glowing RED
  2. Hum problem
  3. Need PS schematic for Musical Machine
  4. Polystyrene capacitor as coupling in output tube stages
  5. Help needed with 10M45S integration .
  6. Ultrasonic Cleaning??????
  7. The daunting world of tubes (where to start)
  8. help 124.3 vac
  9. Bat VK3i buzzing noise
  10. Audioromy FU13 (813) diagram and mods
  11. any complete schematic for 6ak5?
  12. Weird fuzz from Aikido Pre, HELP!
  13. Question about tube amplifier.
  14. 811a rating question
  15. Anode chokes DIY?
  16. EI laminations in Europe
  17. Needed: transformer core materials cobalt nickel
  18. Anybody from Italy - please help
  19. Bogen AP35 amp problem
  20. Question about a VR screen supply
  21. DIY Amp Contest in Japan
  22. Hot 5AR4/GZ34 arcing on powerup surge?
  23. Rh84 Ptx
  24. Buzz. Grounding-related?
  25. 50/60Hz Hum - Your Expert Opinion Please
  26. Static Gm test
  27. High Voltage negative regulators
  28. where do i find old tube car radio schematics?
  29. Burned Up Transformer in HiFi 6p3p Tube Amplifier
  30. capacitors
  31. Wire Types
  32. Weird EH12AY7 Problem
  33. Pot and knob compatability
  34. ECC8100 and ECC2000
  35. DHT experts, i need your help
  36. transformers
  37. Vetruvio class-A
  38. PP to balanced input
  39. KT88 AB2 Experiences
  40. Group buy pulse check for Pete Millett tube crossover PCB
  41. Calculating operating point of a DHT
  42. upgrades, mods to JADIS JA-200, JPS2 and JPS3
  43. McIntosh MC-3500 Schematic Information
  44. Use 2X SE output transformers fo 1x PP
  45. 12B4a spice model.
  46. recommended a tube amp for Celestron Studio Ditton 66's
  47. Help needed with bias circuit
  48. 220 Mega Ohm Resistor - Really
  49. How to bias DH dual triodes?
  50. Any of these tubes good for audio applications?
  51. DIY AN M7 need help !!!
  52. Need schematic for Bell 2420 amp
  53. new SimpleSE build
  54. My Citation II Rebuild
  55. KT88 cathode resistors?
  56. Dynaco ST35 boards
  57. Triode strapping a 6V6 (or any tetrode/pentode, really)
  58. ECC 83 + ELL 80 maybe?
  59. need amp suggestions please.
  60. Phase splitter which tube?
  61. WANTED: 12B4A tubes
  62. re-stacking an output transformer
  63. A directly heated triode or Pentode SE amp on a Budget
  64. Annoying high frequency ringing from my 832 tube amp
  65. 30 Amp Knobs
  66. A question about audio interconnects for the ones here with such knowledge.
  67. Hi-end GM70 amplifier with only 2 stages
  68. Paragon
  69. Simple SE with CCS and fixed bias
  70. Idea(s) for simple HV regulated psu
  71. NOS Philips "miniwatt/dario" tubes
  72. Hybrid Class D with 6n6p tubes
  73. Any ideas how to estimate VA or mA of Power Tranny
  74. 6L6 Grid resistors??
  75. HeathKit W-2: Missing Tube
  76. Edcor CXSE25-8-5K Dimensions
  77. Bias Pots
  78. Negative Feedback
  79. scott 299D output transformers?
  80. chocke anode load, please explain me..
  81. Integrated HiEnd Amp
  82. Looking for advice/tips regarding simple SE amplifer
  83. Tube amps from vintage RTR's?
  84. componet upgrade
  85. What is "AA" ?
  86. question about twin triode tubes
  87. Building a preamp - somewhat new to tubes
  88. need some guidance about tube amplifiers
  89. Blackgate FK 10000 uF ??
  90. PT failure dangers
  91. Outer foil k40y-9
  92. sansui 1000a maintenance
  93. filter cap question
  94. add UL tap for 125ese
  95. Bogen D070 Amp - HELP w/ INFO.
  96. Humming asl 2004dt wave pre amp
  97. Cany anyone supply any info. about this amplifier?
  98. Low voltage 845SE with 300B driver
  99. Cabinet Help!!!!
  100. dc heater supply help
  101. gu-29 tube
  102. LTP question
  103. Over 500V rated electrolytics?
  104. Fireplug? (inline fuse)
  105. Help! Flash-over on my amp :-(
  106. 6550 drive question
  107. 4211D Amp?
  108. Please, reccomand me about 7233 GE NOS
  109. Help! Schematic Conrad Johnson Premier 3
  110. Tubelab SE in parallel?
  111. Just an Idea?
  112. Tried this out, but needs more gain. . .
  113. EL34 Power Stage
  114. Daven Question
  115. How many rectifiers can have mesh plates?
  116. Real Quick Question!!
  117. Wattage of vintage resistors ?
  118. What is the signal path -- the red line?
  119. Hi-end definitive vacuum tube phono pre
  120. Resistors for Stepped Attenuator
  121. dual rectifier clone....
  122. Motorola Console Salvage
  123. single endedtransformer coupled 6sn7 mic preamp
  124. Brett's 12B4 schematic?
  125. insulated turret terminals
  126. Building first tube power amplifier, reccomendations?
  127. Can you use a MOSFET as a cathodyne
  128. Resolving cold midrange in 5687 circuit
  129. 829B SE Comments????
  130. Shielding and regulator location in the KTA 26 preamp
  131. Voice of music, antique or reproduction?
  132. Quick Question - Audio Note M1 or AR SP-6?
  133. Red Light District/Baby Huey (EL84 P-P) Output Iron
  134. help with PSE design
  135. Tantalum VS CC & metalfilm
  136. Rise-time question
  137. Have an odd problem with my Aikido.
  138. Weird Hybrid Splitter (equal impedances?)
  139. Tube 6550 to test
  140. Using semiconductor curvetracer for tubes...
  141. Question regarding 3rd wire grounding and safety
  142. Plate Current VS Plate Voltage Graphs
  143. Toggle Switch Contact Type and Rating
  144. Inside information on Shuguang
  145. 6N6P vs. 6N6P-I
  146. Technical Survey Paper -- Need Some Help!
  147. VOLTAGE DOUBLER : drop in current?
  148. Using genetic algorithms to optimize pentode parameters
  149. Favorite size wire for signal wiring?
  150. Any idea what this thing is?
  151. Breadboarding Poindexter's 6GK5/EL34 Music Machine
  152. anyone ever use el86/6cw5?
  153. bad 5ar4?
  154. 6DJ8 biasing question
  155. Is it worth using anything other than DHTs for preamps?
  156. Billington Export Ltd Tubes?
  157. 845SE : comments on this circuit?
  158. Tip-Restoring Vintage Pot
  159. B+ Delay - Is this a problem?
  160. Toroids in SET
  161. I have to sell my Pyramid-V prototype...
  162. Stealing a preamp
  163. OLD GOLD, or something I can dissassemble and use
  164. CF PP design
  165. Preamp Idea
  166. Metal Oxide Screen Stoppers
  167. Splitting up power supply inductance
  168. Back to Back transformers and safety ground
  169. Vintage tube tester
  170. 7 pin ECC81.
  171. 26 Driver Tube for 45 - Operating Points
  172. My New pre-amplifier£¡
  173. Echocord Super Question
  174. High quality matching panel meters?
  175. 6BY5GA question
  176. Seeking schematic for Conn organ amp
  177. Will this work as a differential stage?
  178. Tube ID and suggestions
  179. 6L6 to EL34 conversion
  180. my saturation test ??
  181. DO-35 diode inside vacuum tube ?
  182. Transformer Polarity
  183. Where to go for tube gear in Hong Kong?
  184. EL84 Shunt reg for pre-amp, 85A1?
  185. Tube Preamp Idea
  186. UTC Linear Standard High Level matching transformers
  187. Manley Compact 160w noise problem -please help
  188. D3a Experimenters Breadboard Project
  189. Dtmm
  190. Running Single Ended 6V6 in Triode Mode
  191. 6v6pp Finished
  192. Stereo Buffer with a single twin triode
  193. Anybody recognize this pentode?
  194. Original schemes of amplifiers for 45 tubes of 1920 and 1930 years?
  195. My new amplifier£_300BSE!
  196. low zout vs output transfo
  197. can't find valve art tube - and glowey tube pic
  198. Which Phono Pre???
  199. BB 1702 DAC + transformer I/V ?
  200. aikido build thread-
  201. Triode Connected 6BK5
  202. need help in building tube amplifier 10 watter
  203. Parasitic oscillations in general
  204. Help Russian tube experts.
  205. forced aircooling
  206. Dirty Cheap Vintage Pot Fix - Your Opinion Please
  207. ask jan first
  208. running 6S4S/6C4C hot .. calling widowmaker
  209. Covi Mark II OTL Help
  210. Volume pot between triodes?
  211. Series Pass Transistor for TL-783
  212. Anyone else have the new Mullard EL34's?
  213. VR tubes in single ended circuits
  214. Transformer for Tube Amps?
  215. "Magga Amp Workshop" builds again (Simple 45 Project)
  216. How to handle Reclaimed Transformers
  217. Dual supply...
  218. How much would this cost/how complicated would this be...
  219. low cost DHT hum pots vendors?
  220. Tube Buffer – question?
  221. Bogen CHB 10A questions
  222. 12B4 Preamp
  223. adding output tubes etc to pre amp
  224. primaluna dialogue 5 and fanboys?
  225. yaqin mc-100b
  226. KT88 in place of 6550?
  227. Tube manaul data sheets
  228. Need a bias supply how??
  229. Wouldn't you just love to have these!. United Electronics 211's
  230. Using single tube of Dual
  231. 21st century tube? Non-Vacuum
  232. making two minibloks for stereo
  233. Lynn Olson Raven Question
  234. Inrush current limiting heater filaments
  235. Tube amp with "meter"?
  236. lytics and choke AFTER regulator
  237. Boosing the power of your existing amp.
  238. Component ID from a 50EH5 Amp
  239. Music Angel KT88 Bridged /Bias problem
  240. Output of preamp drops when overdriven
  241. Choke load calculation...
  242. 807 SE amp schematic
  243. DC Heater Voltage
  244. Choke loading vs. SRPP
  245. Unloaded Power Transformer Current Draw/Janus-Aikido snipet
  246. Need help with tubed output for PCM1793 DAC
  247. Single ended transformer grounding question
  248. Reforming Caps with Variac
  249. First Shot at a 41 SE amp
  250. [Question] Ground Error?

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