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  1. 71A
  2. Sound quality chinese tube amplifiers
  3. freeware circuit simulator for Osx (Mac)
  4. 12ax7LP substitute
  5. RH84 SE Build and custom Edcor power transformer
  6. 6l6 se primary impedance choice
  7. Luxman SQ38FD mkII, schematic
  8. 6c33 SET (my next project). Need some feedback
  9. Amorphous iron UMCCC-125: what would you do from it?
  10. Old Fisher SA-300 Amp help!
  11. What kind of sound does a noisy 12B4 make ??
  12. KT88 bias current keeps drifting
  13. Oddball Tube - Useful for Audio??
  14. 12AX7 dual triode "Signal Enhancer/Conditioner"
  15. 2nos of 6l6 in Parallel SE mode
  16. Output transformer selection
  17. 5C8S rectifier psud2 modle/rectifier information
  18. EF80 / KT77 SIngle Ended
  19. Longevity of output tubes in triode vs pentode
  20. ekco ui59 receiver
  21. simple heater question .....
  22. Different Differential Pairs
  23. Decware Zen SET (first project/90% finished)
  24. YL-1200 for audioamp
  25. 7984's
  26. Building First Preamp HELP
  27. Aikido All-In-One Octal B+ measurement.
  28. OPT PP for GU50 Triode ?
  29. Requesting input on preamp schematic
  30. Longer life 6CA7's for class A
  31. Organ split
  32. Two amps done and done!
  33. Tube ID
  34. How to best drive an 845?
  35. K-16ls + ton pcb (just finished pics)
  36. Helios + Pultec tube EQ rack prototype.
  37. 12ax7 preamplifier with modified power supply!!! please help!
  38. tube amp prototype with pc
  39. Looking for a new diy project
  40. To James or to Baxandall?
  41. 45 triode : max 275 or 300 vdc ?
  42. Anyone with experience breaking in capacitors out of circuit?
  43. Vt-64/800 tube amp/preamp
  44. Hammond 1609 Output Transformer - EL84
  45. 60 Watts A Channel 6528A Tube Amp
  46. AC or DC heathing?
  47. 1000W tube amplifier
  48. LEDs or RC?
  49. Is this amp worth bringing back to life?
  50. Melody PM845
  51. Need help troubleshooting this integrated.
  52. Wanted...design for D3a triode strapped driving 45
  53. Removing Tone Controls from VoM Preamp/Amp
  54. Philips 8580 useful anywhere?
  55. output transformer info
  56. 100Hz square preamp responce help
  57. 6P21s 6n21c tube, True Direct Heater?
  58. Convert Dogzilla for Hi-Fi output
  59. Bogen AP-35 Static and Pop from one channel
  60. EL34 PP triode mode hums
  61. Rectifiers
  62. Yaqin MC 10l problem
  63. Stripping Edcor's powder coating
  64. 5Y3 with slow warm up input and output tubes
  65. power transformer question
  66. DHT heaters . and their property"s
  67. Power Tube Cathode Resistor "distance"
  68. Does the same output power from tube amp and ss amp have difference?
  69. Field coil questions
  70. MC240 found in a shed.
  71. "Impossible" circuit which seems to amplify anyway.
  72. EL84 driving EL84 SEP
  73. Tube buffer for MosFet Citation 12
  74. Building a better power Triode
  75. Original KT88? or not
  76. Moscode 300 Upgrade
  77. Onwer's Manual for Realistic SAF-24D
  78. 2 stage Stereo/4 Stage Mono Triode Preamp with independent drive control & inverters
  79. 6J4 Experiment!
  80. Anyone build Broskie's T8 OTL?
  81. Just WHY are DHT tubes SO Expensive....?
  82. Two chassis grounding
  83. Tubes vs. Caps?
  84. Impedance and output transformer selection question
  85. Preamp tube SRPP 12AU7 VS preamp tube Aikido 12AU7 = all use rec 6X5GT
  86. What kind of tube did I use back then?
  87. Wanted: Vacuum Tube Phono Preamp for PAS
  88. Lower gain in YS Audio linestage
  89. Converting 12FQ8 for 12AX7 , HELP !!!
  90. Transformer Inquiry
  91. Question about rp and the AC load line
  92. KTA-HiFi ST-70 pcb or marantz 8b. HiFi build
  93. What is it about SET's?
  94. The Russian Connection - (Maybe) A build thread. (KT88 SEP)
  95. A small help with russian low voltage tube
  96. Acoustic (not Audio) Alchemy Labs
  97. Mullard 404? ECL82 amp
  98. OP & tube power transormers
  99. EML 300B-XLS Schematic?
  100. Experiences with TAD EL34?
  101. C3g simulation model
  102. ok maybe im just a newb when it comes to amps but...
  103. Yet another compactron to play with...
  104. Weird heater arrangement 12ax7/6bm8
  105. I love SET can we fix what I hate?
  106. Tony's 6H32 pre-amp
  107. To tone control or not to...
  108. EL84 plate voltage.
  109. 6bx7
  110. Anyone in the L.A. area with scope willing to troubleshoot?
  111. Transformers in series OK?
  112. Russian 6CA4/EZ81 Equivalent?
  113. Amp build recomendation.. for Frazier model sevens
  114. How can I make a DIY AC probe for my DMM
  115. PSUDII Question
  116. EH KT88 Glowing Welds?
  117. Not quite DIY
  118. Searching for a TUBE datasheet GE GL-421
  119. 6EM7 Unit 1
  120. woohoo! RDH4!!!
  121. VTL hum
  122. Use CL-90 to slow 5Y3?
  123. Octaves/Ghost notes from Bogen K10. Caps?
  124. Q1, 300B S-Splot, 360V 60mA? Q2, James 6112HS or 6123HS?
  125. What audio output xfmr for a 6BM8 pp amp?
  126. Parafeeding an EL84 SE(T)
  127. Interesting video from the production of KR tubes
  128. Gassy WE 300b
  129. Bogen Pa Identification 6l6 x 4 dual rectifier
  130. SE output transformer DIY
  131. AA 151 or Scott 222
  132. Toroidal Output Transformer
  133. Hytron HY615 Data ???
  134. Can I use a 12AX7 with CT 6.3V?
  135. torroidal power transformers
  136. What amp is this
  137. B+ ramping up before CCS filament - danger?
  138. Recommend a good plate choke for 26 tube!!
  139. S11E12 TUBES
  140. Low dropout 6.3v
  141. how to adjust the filament power ecc83
  142. Cary/AES - AE3 Linestage Help Needed !
  143. 5867a
  144. 6V6/12AX7 Project Question/Help
  145. Ultra Linear Push Pull Tube amp
  146. A little help with 6v6 screen needed.
  147. Output Transformers... Decisions Decisions
  148. Need Help. PSU not voltage down from design
  149. D/A preamp FFT measurements for review plz
  150. Type 40, 12A, 112A(syl)
  151. American Audio Picker
  152. one half of a tube in schematic????
  153. estimating power rating of Telefunken transformer
  154. Where is mistake??
  155. Building a 6s45P amp - transformer help
  156. High-End preamplifier with ECC82!
  157. Attempting to recap a couple of old Ampex 2010 suitcase amps
  158. Hi specs rectifier needed
  159. Lux 6056N Interstage Transformer
  160. Aikido Line Stage / Buffer
  161. JJ KT88s and other octals
  162. Triodes from Russia
  163. Little help needed / do I have a bad tube or really good tube?
  164. 5.1 channel 807 SE amplifier
  165. Plate loaded 6N6P over SRPP 6N6P any day of the week...
  166. Voltage multiplier vs transformer for preamp HV power supply
  167. does tube bias drift like silicon devices
  168. Best EL34 For Triode mode
  169. ASL AQ 1002 PP KT88 problem with input stage
  170. 2A3 Amp schematic suggestions?
  171. what I need for safe use mercury rectifier
  172. Anybody listened to Glow Audio?
  173. Tubes too close to output transformers?
  174. Help with stereo to mono for project
  175. MC3500 with 807 tubes and modern driver tubes
  176. I need a project......preferably a HIFI amp..........
  177. REN904 for linestage?
  178. Urgent advice on Chinese purchase please!
  179. VR tubes, minimum current
  180. Senior Project Tube Preamp
  181. Antek AS-4T430 measurements
  182. small, light dc coupled 6ea7 amp sanity check
  183. 6S33S SE Transformer Set
  184. I think I blew my amp!! plase help
  185. Genalex VS Mullard 12AT7 & 12AX7's HUGE DIFF?
  186. Music Angel XD-850MKIII 300b integrated amp
  187. 8150's
  188. More junk from China
  189. 6GM8 above 8mA/24V
  190. One Tube Sound Better Than Four?
  191. HK Citation V rebuild - any advice?
  192. 6GM8/ECC86
  193. Sound Valves vtp-101 Schematic
  194. ~17-18w sweep tube with large plate cap
  195. Fisher 500B Comparison
  196. New build of P-P PCL86 Amp
  197. Transformer question
  198. Can 110V Quad IIs be configured to 220V?
  199. Advice needed re repairing Audio Research VT100
  200. Yaqin SD-CD3 Tube Buffer - upgrading caps
  201. Gyrator PSU's in tube amps
  202. EL34 Amp Running KT66, Safe ?
  203. MJ Optimized Valve Regulator
  204. Need JAN 6418 tube stereo headphone preamp kit advice!
  205. Electronic choke
  206. Can you please help identifying this amp?
  207. [TubeAmp] Beginner's questions
  208. .47uF output cap to 1uF?
  209. Spark gaps on output transformers
  210. St 35 or St 70?
  211. Pi wound output transformers
  212. miniatures 6n1p 6n2p
  213. HK Citation V schematic?
  214. Physical Oscillating noise from phono stage
  215. PP 6c33c-b
  216. Modifying the classic Williamson
  217. eimac 152TL and 304TL
  218. LTspice model for Dynaco A470 Output Transfomer
  219. audiodesignguide.com PP KT88
  220. One more 4P1L SE
  221. Mount rectifier above torroidal transformer?
  222. Extending Tube Sockets off a PCB
  223. Looking for a great starter stereo P-P amp
  224. Question regarding value of Telefunken tubes.
  225. Magic Eye tube
  226. Partridge Transformers
  227. 6CG7 replacing E88CC in SE KT88 Amp.
  228. Omit the filament windings -- LTM8033 from Linear
  229. Best position for bleeder resistor?
  230. anyone have experience with a Radio Craftsmen C400?
  231. Amp-A, a variation to the EL84 Push Pull theme
  232. tony's 6LU8 push-pull power amp build
  233. First Post Here
  234. MFA Lumi sings high-pitched tunes
  235. Power tubes not drawing current
  236. replacing tubes with circuitry
  237. High Voltage Regulators (Maida or zener)
  238. GU-81m tube amp schematics???
  239. Suggestions on SIPP driver stage
  240. How to eliminate the "white noise" for the 300B tube amp?
  241. 6BQ5 UL Curves?
  242. Looking for simple Schematic of 2A3 or 45 or 26 Headphone Amp SE OTL ? anyone ?
  243. 6N1P and 6N6P OTL headphone amp
  244. New Project
  245. Understanding Steve Bench's regulated power supply
  246. Preamp with buffer design
  247. JP200 preamp?
  248. IFI 6SN7 X3 (6N8P-6H8C) Tube Valve Preamp Kit Board from eBay
  249. New Tube Manufacture?
  250. Lowering B+ in PS

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