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  1. Group buy pulse check for Pete Millett tube crossover PCB
  2. Calculating operating point of a DHT
  3. upgrades, mods to JADIS JA-200, JPS2 and JPS3
  4. McIntosh MC-3500 Schematic Information
  5. Use 2X SE output transformers fo 1x PP
  6. 12B4a spice model.
  7. Help identifying a capacitor
  8. recommended a tube amp for Celestron Studio Ditton 66's
  9. Help needed with bias circuit
  10. 220 Mega Ohm Resistor - Really
  11. How to bias DH dual triodes?
  12. Any of these tubes good for audio applications?
  13. DIY AN M7 need help !!!
  14. Need schematic for Bell 2420 amp
  15. new SimpleSE build
  16. My Citation II Rebuild
  17. KT88 cathode resistors?
  18. Dynaco ST35 boards
  19. Triode strapping a 6V6 (or any tetrode/pentode, really)
  20. ECC 83 + ELL 80 maybe?
  21. need amp suggestions please.
  22. Phase splitter which tube?
  23. WANTED: 12B4A tubes
  24. re-stacking an output transformer
  25. A directly heated triode or Pentode SE amp on a Budget
  26. Annoying high frequency ringing from my 832 tube amp
  27. 30 Amp Knobs
  28. A question about audio interconnects for the ones here with such knowledge.
  29. Hi-end GM70 amplifier with only 2 stages
  30. Paragon
  31. Simple SE with CCS and fixed bias
  32. Idea(s) for simple HV regulated psu
  33. NOS Philips "miniwatt/dario" tubes
  34. Hybrid Class D with 6n6p tubes
  35. Any ideas how to estimate VA or mA of Power Tranny
  36. 6L6 Grid resistors??
  37. HeathKit W-2: Missing Tube
  38. Edcor CXSE25-8-5K Dimensions
  39. Bias Pots
  40. Negative Feedback
  41. scott 299D output transformers?
  42. chocke anode load, please explain me..
  43. Integrated HiEnd Amp
  44. Looking for advice/tips regarding simple SE amplifer
  45. Tube amps from vintage RTR's?
  46. componet upgrade
  47. What is "AA" ?
  48. question about twin triode tubes
  49. Building a preamp - somewhat new to tubes
  50. need some guidance about tube amplifiers
  51. Blackgate FK 10000 uF ??
  52. PT failure dangers
  53. Outer foil k40y-9
  54. sansui 1000a maintenance
  55. filter cap question
  56. add UL tap for 125ese
  57. Bogen D070 Amp - HELP w/ INFO.
  58. Humming asl 2004dt wave pre amp
  59. Cany anyone supply any info. about this amplifier?
  60. Low voltage 845SE with 300B driver
  61. Cabinet Help!!!!
  62. dc heater supply help
  63. gu-29 tube
  64. LTP question
  65. Over 500V rated electrolytics?
  66. Fireplug? (inline fuse)
  67. Help! Flash-over on my amp :-(
  68. 6550 drive question
  69. 4211D Amp?
  70. Please, reccomand me about 7233 GE NOS
  71. Help! Schematic Conrad Johnson Premier 3
  72. Tubelab SE in parallel?
  73. Just an Idea?
  74. Tried this out, but needs more gain. . .
  75. EL34 Power Stage
  76. Daven Question
  77. How many rectifiers can have mesh plates?
  78. Real Quick Question!!
  79. Wattage of vintage resistors ?
  80. What is the signal path -- the red line?
  81. Hi-end definitive vacuum tube phono pre
  82. Resistors for Stepped Attenuator
  83. dual rectifier clone....
  84. Motorola Console Salvage
  85. single endedtransformer coupled 6sn7 mic preamp
  86. Brett's 12B4 schematic?
  87. insulated turret terminals
  88. Building first tube power amplifier, reccomendations?
  89. Can you use a MOSFET as a cathodyne
  90. Resolving cold midrange in 5687 circuit
  91. 829B SE Comments????
  92. Shielding and regulator location in the KTA 26 preamp
  93. Voice of music, antique or reproduction?
  94. Quick Question - Audio Note M1 or AR SP-6?
  95. Red Light District/Baby Huey (EL84 P-P) Output Iron
  96. help with PSE design
  97. Tantalum VS CC & metalfilm
  98. Rise-time question
  99. Have an odd problem with my Aikido.
  100. Weird Hybrid Splitter (equal impedances?)
  101. Tube 6550 to test
  102. Using semiconductor curvetracer for tubes...
  103. Question regarding 3rd wire grounding and safety
  104. Plate Current VS Plate Voltage Graphs
  105. Toggle Switch Contact Type and Rating
  106. Inside information on Shuguang
  107. 6N6P vs. 6N6P-I
  108. Technical Survey Paper -- Need Some Help!
  109. VOLTAGE DOUBLER : drop in current?
  110. Using genetic algorithms to optimize pentode parameters
  111. Favorite size wire for signal wiring?
  112. Any idea what this thing is?
  113. Breadboarding Poindexter's 6GK5/EL34 Music Machine
  114. anyone ever use el86/6cw5?
  115. bad 5ar4?
  116. 6DJ8 biasing question
  117. Is it worth using anything other than DHTs for preamps?
  118. Billington Export Ltd Tubes?
  119. 845SE : comments on this circuit?
  120. Tip-Restoring Vintage Pot
  121. B+ Delay - Is this a problem?
  122. Toroids in SET
  123. I have to sell my Pyramid-V prototype...
  124. Stealing a preamp
  125. OLD GOLD, or something I can dissassemble and use
  126. CF PP design
  127. Preamp Idea
  128. Metal Oxide Screen Stoppers
  129. Splitting up power supply inductance
  130. Back to Back transformers and safety ground
  131. Vintage tube tester
  132. 7 pin ECC81.
  133. 26 Driver Tube for 45 - Operating Points
  134. My New pre-amplifier£¡
  135. Echocord Super Question
  136. High quality matching panel meters?
  137. 6BY5GA question
  138. Seeking schematic for Conn organ amp
  139. Will this work as a differential stage?
  140. Tube ID and suggestions
  141. 6L6 to EL34 conversion
  142. my saturation test ??
  143. DO-35 diode inside vacuum tube ?
  144. Transformer Polarity
  145. Modular Gain Stages for Tube Guitar Amp
  146. Where to go for tube gear in Hong Kong?
  147. EL84 Shunt reg for pre-amp, 85A1?
  148. Tube Preamp Idea
  149. UTC Linear Standard High Level matching transformers
  150. Manley Compact 160w noise problem -please help
  151. D3a Experimenters Breadboard Project
  152. Dtmm
  153. Running Single Ended 6V6 in Triode Mode
  154. 6v6pp Finished
  155. Stereo Buffer with a single twin triode
  156. Marshall volume drop off help
  157. Anybody recognize this pentode?
  158. Original schemes of amplifiers for 45 tubes of 1920 and 1930 years?
  159. My new amplifier£_300BSE!
  160. low zout vs output transfo
  161. can't find valve art tube - and glowey tube pic
  162. Which Phono Pre???
  163. EICO HF-20 Guitar Amp Convert
  164. BB 1702 DAC + transformer I/V ?
  165. aikido build thread-
  166. Triode Connected 6BK5
  167. need help in building tube amplifier 10 watter
  168. Parasitic oscillations in general
  169. Help Russian tube experts.
  170. forced aircooling
  171. Dirty Cheap Vintage Pot Fix - Your Opinion Please
  172. ask jan first
  173. running 6S4S/6C4C hot .. calling widowmaker
  174. An Odd Duck -- Gibson BR-6f Guitar Amp
  175. Covi Mark II OTL Help
  176. Volume pot between triodes?
  177. Series Pass Transistor for TL-783
  178. Anyone else have the new Mullard EL34's?
  179. VR tubes in single ended circuits
  180. Transformer for Tube Amps?
  181. "Magga Amp Workshop" builds again (Simple 45 Project)
  182. How to handle Reclaimed Transformers
  183. Dual supply...
  184. How much would this cost/how complicated would this be...
  185. low cost DHT hum pots vendors?
  186. Tube Buffer – question?
  187. Bogen CHB 10A questions
  188. 12B4 Preamp
  189. adding output tubes etc to pre amp
  190. primaluna dialogue 5 and fanboys?
  191. yaqin mc-100b
  192. KT88 in place of 6550?
  193. Tube manaul data sheets
  194. Need a bias supply how??
  195. Wouldn't you just love to have these!. United Electronics 211's
  196. Using single tube of Dual
  197. 21st century tube? Non-Vacuum
  198. making two minibloks for stereo
  199. Lynn Olson Raven Question
  200. Inrush current limiting heater filaments
  201. Tube amp with "meter"?
  202. lytics and choke AFTER regulator
  203. Boosing the power of your existing amp.
  204. Component ID from a 50EH5 Amp
  205. Music Angel KT88 Bridged /Bias problem
  206. Output of preamp drops when overdriven
  207. Choke load calculation...
  208. 807 SE amp schematic
  209. DC Heater Voltage
  210. Choke loading vs. SRPP
  211. Unloaded Power Transformer Current Draw/Janus-Aikido snipet
  212. Need help with tubed output for PCM1793 DAC
  213. Single ended transformer grounding question
  214. Reforming Caps with Variac
  215. First Shot at a 41 SE amp
  216. [Question] Ground Error?
  217. TOMIKO OPT-SE, any good?
  218. 6550 Williamson - Low Bass Response...
  219. Preamp design question
  220. Reading Oscilloscope Traces -For Dummies
  221. Power Supply Question
  222. PI Question Guitar Amp Related
  223. Altec 1568A modifications for comments and help…. again
  224. H & K Tube 20 unruly gain
  225. Electro-Harmonix interview
  226. Using LED bias for 4.5 mA cathode current, is it a good idea?
  227. amp dead?
  228. 7189 vs EL84 +458v plate
  229. What does your Aikido drive?
  230. Help with Decware SE84 Kit!
  231. Hybrid Amplifier in Small cases
  232. audio mixer with tubes?
  233. Epiphone Galaxy 25 transformer problem
  234. Help with KT88 biasing
  235. Bad Schottky??
  236. Aikido Diagnostic
  237. Could this become a Baby Huey killer ?
  238. SV83 vs EL84
  239. KT88 PP-5 Monoblock Amplifier
  240. RE604 SET amp
  241. Dropping rectifier filament voltage
  242. need suggestion about MC pre-pre
  243. New gain stage .. Opinions???
  244. Using SS to augment < 100Hz?
  245. A help with an soviet transformer.
  246. I thought that I had seen everything
  247. Triatic PP-amp with 6p14p
  248. Single 6N6P stereo pre-amp
  249. Tubelab SE input tube filament
  250. high frequency oscillation and decoupling question

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