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  1. Pronouced 300B amp Midrange
  2. Tube preamp with current mirror
  3. Transformer Coupling and Headphones? (Toob Noob)
  4. Who can explain the source of this Siemens 12AU7
  5. how does one tell when a tube is truely dead?
  6. A curious observation
  7. Help choosing capacitor value?
  8. Neon Power?
  9. The rectifier from hell, a little story.
  10. a directly heated monkey?
  11. 6l6gc SET, my first DIY
  12. SE Output Transformer Matching
  13. power tube biasing
  14. Jupiters: Tolerance: 26% over spec: o.k.?
  15. Help! 6DJ8 Tube Buffer Schematics
  16. Output Transformers for an EL84 Push-Pull Amp
  17. Advice regarding philips/mullard EL34
  18. 300b based monoblock plans
  19. need help for Marshall PCB
  20. Marshall schematic ?
  21. counterpoint Sa 5.1
  22. Help with bogen CH8
  23. where do you get those schematics / layouts?
  24. Spice 3f4 model of a low voltage direct heated signal level pentode
  25. ECC82
  26. Major diff between 12AX7 and 12AU7
  27. Voltage doubler question
  28. el34 instead of 6550
  29. Bogen CH8
  30. Ah Njoe Tjoeb 4000 problem
  31. my last project
  32. TIP50 voltage regulator
  33. Collets for 212 pins
  34. K-12M Enclosure + Upgrades. Finished!
  35. Will this work?
  36. Big tube - what is it?
  37. Help! no signal! Marshall JTM60
  38. PSU topology & regulator
  39. Dynaco from scratch
  40. 6HV5A Single Ended Amp
  41. Cheap but not too much !
  42. Quick Output Transformer Question
  43. Help with guitar tube amp mods
  44. strange thing with AMC 2030
  45. GE6072 replacement tube
  46. Counterpoint 5.1 preamp
  47. Tube library
  48. RIAA recording on CD
  49. Old SE transformer measuring?
  50. Speakers for tube amps...
  51. MF x10v3
  52. Free Tube Books.....
  53. A Transformer question
  54. 6v6 PP - No sound
  55. help with interstage needed
  56. Hum in Speakers
  57. Just another PP...
  58. Leak Stereo 20 questions
  59. 10M45 CCS, what am I doing wrong ?
  60. Various transformers
  61. tubes sound
  62. Power supply help!
  63. KR Tubes
  64. Bi-amp Between Tube, and SS
  65. 2 Tube questions,
  66. my biggest project ever , need lotsa help plz
  67. tube temperatures
  68. hh scott bias issues
  69. B+ required w/ ccs load
  70. Info re Soundtech powerone tube amp
  71. Verdier Regulated Power Supply
  72. 6DJ8/ECC88 mu-follower
  73. Tube Compressor
  74. Newbie PSU question
  75. Hickok Cardmatic tube tester cards
  76. Hashimoto SE Output Transformer
  77. Ripple and chokes
  78. Tubes driven by BJT's
  79. Red LED substitution questions
  80. Hytron big 71A
  81. Need some help for 6L6 amp
  82. 802 as an audio output tube
  83. Changing 6DJ8 SRPP stage gain
  84. Cooling In Cab / Minimum Vent Area?
  85. Tube voltage help
  86. MF XPre troubleshooting
  87. Giaime's Preamp Finished!!!
  88. Circuit and PCB Layout comments
  89. 4613 triode
  90. Help with inverter CCS+NFB
  91. Question about KT 88 integrated
  92. The Trials, and Tribulations of Bias
  93. Which components should be matched?
  94. Using PP output for SE?
  95. Tube Newbee Needing Guidance
  96. 12A/71A SET project
  97. 805 SE amplifier
  98. Playing with screen resistors
  99. Interpret this 12ax7 feedback loop
  100. Low voltage-drop CCS for LTP input stage?
  101. Tube Socket Mounting - rigid or floating
  102. SE-9 mod help please
  103. 2a3SE
  104. 20 Watt SE. I had found it.
  105. Ok to exceed Vg2 in triode? (Yes)
  106. Fender Adjustments
  107. Help needed in Bloomington IN
  108. % error for primary resistance
  109. Help Understanding Circuit (grounded grid I/V)
  110. Testing a 70.7v transformer
  111. thyratron?
  112. Tube frontend....
  113. Transformer and Choke Grounding?
  114. El509 Pse
  115. 6550 Safety Question
  116. Jadis Defy 7 : Manual
  117. Melos Ma-111b
  118. Old audio amp change
  119. Need 45 tubes
  120. Jadis Defy 7 : Manual ??
  121. Help for pre-amp and two single-ended finals
  122. Schematic needed:MFA Magus B
  123. Can I remove the input caps?
  124. 807 vs. 1624 tetrode ?
  125. how to make tube amp sound layback and mellow?
  126. Standard tube filament voltages and currents
  127. SE 20W. What tube?
  128. 5687 Linestage behaving odd...
  129. SMPS & tube pre-amp development board.
  130. Question about Melody KT88 amp
  131. Trafomatic Transformer
  132. Diode trick?
  133. Return of the vacuum tube sonic hologram generator
  134. 6V6 ->EL84 with 12AT7?
  135. design for 6336A OTL amp needed
  136. Aikido sound?
  137. Valve preamp
  138. GAS VR Tubes on B+
  139. Measuring Triode-Connected Pentode Curves
  140. 6L6, 12L6 not same tube!
  141. equivilent part numbers for 6K35HF
  142. Is this a start or run cap
  143. 6V6 PP under construction - pics
  144. Is this practical
  145. Idea for a 2 tube 6080 PP amp.
  146. pls tell where to buy core of transformer
  147. 300B amp PS optimization?
  148. Different value for .47uf coupling cap
  149. Old Olympic audio tube amp
  150. What Design to Use?
  151. KT90's anyone using'em ?
  152. What are they?
  153. Replace el34 with 6p3s
  154. Advice on 6V6 push pull Parallel
  155. squealing output transformer
  156. Melos Sha Gold
  157. Ways to Lower B+ in a Tube Rectifed PS
  158. Oregon Electronics D6 HV supplies: info needed please
  159. My version of the Vacuum State FVP5
  160. Diy Tube Phono Preamp
  161. double check the math
  162. Kitparts line stage
  163. Aikido tube heater floating
  164. Cathode and other types of feedback
  165. Tube God TH-1 Amp Regulator PCB ????
  166. step-up travel transformer for small preamp?
  167. Help a total tube amp newbie find a super simple design...
  168. heretical unity gain and ccs question
  169. Vox tubes glowing red hot
  170. What To Do
  171. Parallel Two Tubes
  172. 4 x PSE EL34
  173. EL34 CCS help
  174. Tube curve tracer project
  175. Single Ended EL-34?
  176. maxi tube tester?
  177. Zener Bias
  178. Looking to build a tube amp.
  179. Tube humming question
  180. YAPPAP (Yet Another Push-Pull Amplifier Project)
  181. voltage output dac ==> TUBE
  182. Heater switch transistor
  183. Anything post power transformer that can cause it to hum / buzz?
  184. Aikido enclosure
  185. Power Transformers. Decisions
  186. First tube after IV
  187. Suggestions for Upgrade - VDV70/100
  188. New Hybrid Output Stage and booster for SE Amp
  189. Pro and cons high DCR filter choke
  190. do-it yourself leslie help
  191. John Broskie Aikido boards
  192. Making a muscular triode monoblock amplifier using P-P Eimac 450TH's
  193. Limited run PCBs - where's copyright???
  194. Hammond Amp Question
  195. Impedance matching
  196. 6111 output for CD player - opinions - some help?
  197. Sensitivity Limiter - Bogen Mx-30a
  198. Are my speakers efficient enough for tubes?
  199. Ping Sy: LED for Cathode Bias
  200. PSU capacitors/electrolytics
  201. 2A3 monoblock power supply
  202. 2 tube questions
  203. Just acquired HEATHKIT W4-AM-*picture*
  204. Passive line stage with tubes
  205. My favorite preamp
  206. Again, a preamp tube choice.
  207. Class Double A
  208. Two Stereo Tube Amps Into Monoblocks
  209. Multi-purpose tube amp (line and guitar inputs)
  210. Espey AM/FM radio (pentagrid mixer, etc.)
  211. Need help for DIY EL34PP tube amp
  212. Higher value oil capacitors?
  213. Transconductance.
  214. 5763 tetrode on OTL ?
  215. cornford harlequin
  216. Need help: 5687 tubes and heat dissipation
  217. Tube preamp, tone control problem
  218. Use 5KV transformer as output transformer?
  219. Any EL84 alternatives?
  220. help on id of tubes
  221. Sovtek 6CA7-EH Producing smoke...
  222. building V4's and phono pre
  223. pre out on a integrated tube amp?
  224. 6SN7 some good some bad
  225. Phono pre amp - thanks SY
  226. 6c33c Tube preamp
  227. Tubes for Lumley ST40 power amplifier?
  228. Plate supply of Conrad Johnson PV-5 ?
  229. 6CD6GA in Enhanced Triode Mode for SE Amp
  230. Fender 6G15 clone
  231. Gridstoppers against RF, a necessity ?
  232. where do I.E.T. tubes come from
  233. I wanna DIY a PP 6550 Guitar Setup
  234. Hum 300b Again
  235. Pse El34
  236. Mcintosh MR65 Tube Tuner
  237. Problem: Really Bright glowing 6CA7
  238. New member introduction & question
  239. The "PowerTotem"... a new way to SET?
  240. Please advice on KT88 Push Pull
  241. console "guitar amp" part 2
  242. Odd's n Ends Revisited 6V6 SE amp
  243. Bottlehead Foreplay with chipamp
  244. Next Amp: 2a3PSE, 300B or KT88SE UL
  245. transformer list
  246. do 300b amps really sound any good?
  247. Capacitance For Mono Block Design
  248. pilot 264
  249. Octal equivalents for 6C45?
  250. lm3875 chipamp and tube pre loud buzzing

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