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  1. Output transformer selection
  2. 5C8S rectifier psud2 modle/rectifier information
  3. EF80 / KT77 SIngle Ended
  4. Longevity of output tubes in triode vs pentode
  5. ekco ui59 receiver
  6. simple heater question .....
  7. Different Differential Pairs
  8. Decware Zen SET (first project/90% finished)
  9. YL-1200 for audioamp
  10. 7984's
  11. Building First Preamp HELP
  12. Aikido All-In-One Octal B+ measurement.
  13. OPT PP for GU50 Triode ?
  14. Requesting input on preamp schematic
  15. Longer life 6CA7's for class A
  16. Organ split
  17. Two amps done and done!
  18. Testing the 5842/417a on Sencore MU150?
  19. Tube ID
  20. How to best drive an 845?
  21. K-16ls + ton pcb (just finished pics)
  22. Helios + Pultec tube EQ rack prototype.
  23. 12ax7 preamplifier with modified power supply!!! please help!
  24. tube amp prototype with pc
  25. Looking for a new diy project
  26. To James or to Baxandall?
  27. 45 triode : max 275 or 300 vdc ?
  28. Anyone with experience breaking in capacitors out of circuit?
  29. Vt-64/800 tube amp/preamp
  30. Hammond 1609 Output Transformer - EL84
  31. Chinese Capacitors
  32. 60 Watts A Channel 6528A Tube Amp
  33. AC or DC heathing?
  34. 1000W tube amplifier
  35. LEDs or RC?
  36. Is this amp worth bringing back to life?
  37. Melody PM845
  38. Need help troubleshooting this integrated.
  39. Wanted...design for D3a triode strapped driving 45
  40. Removing Tone Controls from VoM Preamp/Amp
  41. Philips 8580 useful anywhere?
  42. output transformer info
  43. 100Hz square preamp responce help
  44. 6P21s 6n21c tube, True Direct Heater?
  45. Convert Dogzilla for Hi-Fi output
  46. Bogen AP-35 Static and Pop from one channel
  47. EL34 PP triode mode hums
  48. Rectifiers
  49. Yaqin MC 10l problem
  50. Stripping Edcor's powder coating
  51. 5Y3 with slow warm up input and output tubes
  52. power transformer question
  53. DHT heaters . and their property"s
  54. Power Tube Cathode Resistor "distance"
  55. Does the same output power from tube amp and ss amp have difference?
  56. 32 Channel Microphone Preamp
  57. Field coil questions
  58. MC240 found in a shed.
  59. "Impossible" circuit which seems to amplify anyway.
  60. EL84 driving EL84 SEP
  61. Tube buffer for MosFet Citation 12
  62. Building a better power Triode
  63. Original KT88? or not
  64. Moscode 300 Upgrade
  65. Onwer's Manual for Realistic SAF-24D
  66. 2 stage Stereo/4 Stage Mono Triode Preamp with independent drive control & inverters
  67. 6J4 Experiment!
  68. Anyone build Broskie's T8 OTL?
  69. Just WHY are DHT tubes SO Expensive....?
  70. Two chassis grounding
  71. Tubes vs. Caps?
  72. Impedance and output transformer selection question
  73. Preamp tube SRPP 12AU7 VS preamp tube Aikido 12AU7 = all use rec 6X5GT
  74. Stark 9-66 tester repair
  75. What kind of tube did I use back then?
  76. Wanted: Vacuum Tube Phono Preamp for PAS
  77. Lower gain in YS Audio linestage
  78. Converting 12FQ8 for 12AX7 , HELP !!!
  79. Transformer Inquiry
  80. Pitfalls of paralleling different resistor brands?
  81. Question about rp and the AC load line
  82. KTA-HiFi ST-70 pcb or marantz 8b. HiFi build
  83. What is it about SET's?
  84. The Russian Connection - (Maybe) A build thread. (KT88 SEP)
  85. A small help with russian low voltage tube
  86. Acoustic (not Audio) Alchemy Labs
  87. Mullard 404? ECL82 amp
  88. OP & tube power transormers
  89. EML 300B-XLS Schematic?
  90. Experiences with TAD EL34?
  91. C3g simulation model
  92. ok maybe im just a newb when it comes to amps but...
  93. Yet another compactron to play with...
  94. Weird heater arrangement 12ax7/6bm8
  95. I love SET can we fix what I hate?
  96. Tony's 6H32 pre-amp
  97. To tone control or not to...
  98. EL84 plate voltage.
  99. 6bx7
  100. Anyone in the L.A. area with scope willing to troubleshoot?
  101. Transformers in series OK?
  102. Russian 6CA4/EZ81 Equivalent?
  103. Amp build recomendation.. for Frazier model sevens
  104. How can I make a DIY AC probe for my DMM
  105. PSUDII Question
  106. EH KT88 Glowing Welds?
  107. Not quite DIY
  108. Searching for a TUBE datasheet GE GL-421
  109. 6EM7 Unit 1
  110. woohoo! RDH4!!!
  111. VTL hum
  112. Use CL-90 to slow 5Y3?
  113. Allen Wright, 1947-2011
  114. Octaves/Ghost notes from Bogen K10. Caps?
  115. Q1, 300B S-Splot, 360V 60mA? Q2, James 6112HS or 6123HS?
  116. What audio output xfmr for a 6BM8 pp amp?
  117. Parafeeding an EL84 SE(T)
  118. Interesting video from the production of KR tubes
  119. Gassy WE 300b
  120. Bogen Pa Identification 6l6 x 4 dual rectifier
  121. SE output transformer DIY
  122. Tektronix TDS714L or other Tek TDS series digital oscilloscope for stereo?
  123. AA 151 or Scott 222
  124. Toroidal Output Transformer
  125. Hytron HY615 Data ???
  126. Can I use a 12AX7 with CT 6.3V?
  127. torroidal power transformers
  128. What amp is this
  129. B+ ramping up before CCS filament - danger?
  130. Recommend a good plate choke for 26 tube!!
  131. S11E12 TUBES
  132. Low dropout 6.3v
  133. how to adjust the filament power ecc83
  134. Cary/AES - AE3 Linestage Help Needed !
  135. 5867a
  136. 6V6/12AX7 Project Question/Help
  137. Ultra Linear Push Pull Tube amp
  138. A little help with 6v6 screen needed.
  139. Output Transformers... Decisions Decisions
  140. Need Help. PSU not voltage down from design
  141. D/A preamp FFT measurements for review plz
  142. Type 40, 12A, 112A(syl)
  143. American Audio Picker
  144. one half of a tube in schematic????
  145. estimating power rating of Telefunken transformer
  146. Where is mistake??
  147. Building a 6s45P amp - transformer help
  148. High-End preamplifier with ECC82!
  149. Attempting to recap a couple of old Ampex 2010 suitcase amps
  150. Hi specs rectifier needed
  151. Lux 6056N Intertstage Transformer
  152. Aikido Line Stage / Buffer
  153. JJ KT88s and other octals
  154. Triodes from Russia
  155. Little help needed / do I have a bad tube or really good tube?
  156. 5.1 channel 807 SE amplifier
  157. Plate loaded 6N6P over SRPP 6N6P any day of the week...
  158. Voltage multiplier vs transformer for preamp HV power supply
  159. does tube bias drift like silicon devices
  160. What are the best pots for less than $50 each?
  161. Best EL34 For Triode mode
  162. ASL AQ 1002 PP KT88 problem with input stage
  163. 2A3 Amp schematic suggestions?
  164. what I need for safe use mercury rectifier
  165. Anybody listened to Glow Audio?
  166. Tubes too close to output transformers?
  167. Help with stereo to mono for project
  168. MC3500 with 807 tubes and modern driver tubes
  169. Multiple Film Caps in parallel, Problems?
  170. I need a project......preferably a HIFI amp..........
  171. Aguilar DB-900 question
  172. REN904 for linestage?
  173. Urgent advice on Chinese purchase please!
  174. VR tubes, minimum current
  175. Senior Project Tube Preamp
  176. Antek AS-4T430 measurements
  177. small, light dc coupled 6ea7 amp sanity check
  178. 6S33S SE Transformer Set
  179. I think I blew my amp!! plase help
  180. Genalex VS Mullard 12AT7 & 12AX7's HUGE DIFF?
  181. testing 6550's on a Hickok 539b, same as KT88?
  182. 9V tube drive pedals - worth it?
  183. Music Angel XD-850MKIII 300b integrated amp
  184. 8150's
  185. More junk from China
  186. 6GM8 above 8mA/24V
  187. One Tube Sound Better Than Four?
  188. HK Citation V rebuild - any advice?
  189. 6GM8/ECC86
  190. Sound Valves vtp-101 Schematic
  191. ~17-18w sweep tube with large plate cap
  192. Fisher 500B Comparison
  193. New build of P-P PCL86 Amp
  194. Transformer question
  195. Can 110V Quad IIs be configured to 220V?
  196. Advice needed re repairing Audio Research VT100
  197. Yaqin SD-CD3 Tube Buffer - upgrading caps
  198. Best value speakers
  199. Gyrator PSU's in tube amps
  200. EL34 Amp Running KT66, Safe ?
  201. MJ Optimized Valve Regulator
  202. Need JAN 6418 tube stereo headphone preamp kit advice!
  203. Electronic choke
  204. Can you please help identifying this amp?
  205. [TubeAmp] Beginner's questions
  206. .47uF output cap to 1uF?
  207. Spark gaps on output transformers
  208. St 35 or St 70?
  209. Pi wound output transformers
  210. miniatures 6n1p 6n2p
  211. HK Citation V schematic?
  212. Help! can't find ef86 on my Hickok 539b roll chart! and need a tube project
  213. Physical Oscillating noise from phono stage
  214. PP 6c33c-b
  215. Modifying the classic Williamson
  216. eimac 152TL and 304TL
  217. LTspice model for Dynaco A470 Output Transfomer
  218. audiodesignguide.com PP KT88
  219. One more 4P1L SE
  220. Mount rectifier above torroidal transformer?
  221. Extending Tube Sockets off a PCB
  222. EMG 200 tube tester
  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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