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  1. How to calculate source impedance for audio transformer?
  2. Schematic for REDDi DI-Box?
  3. what the best kit for Dynaco
  4. That mystery trem cap
  5. A Hot Rodded Bottlehead S.E.X. Amplifier
  6. Cheap Chinese amps
  7. Wanted: Leak ST-50 Mains transformer 240V
  8. Eico HF-20 to bass guitar amp
  9. Ampeg B-18 issue/debug
  10. Who makes their own OPT around here?
  11. 71A
  12. Sound quality chinese tube amplifiers
  13. freeware circuit simulator for Osx (Mac)
  14. 12ax7LP substitute
  15. RH84 SE Build and custom Edcor power transformer
  16. 6l6 se primary impedance choice
  17. Luxman SQ38FD mkII, schematic
  18. 6c33 SET (my next project). Need some feedback
  19. Amorphous iron UMCCC-125: what would you do from it?
  20. Old Fisher SA-300 Amp help!
  21. What kind of sound does a noisy 12B4 make ??
  22. KT88 bias current keeps drifting
  23. Oddball Tube - Useful for Audio??
  24. 12AX7 dual triode "Signal Enhancer/Conditioner"
  25. 2nos of 6l6 in Parallel SE mode
  26. Output transformer selection
  27. 5C8S rectifier psud2 modle/rectifier information
  28. EF80 / KT77 SIngle Ended
  29. Longevity of output tubes in triode vs pentode
  30. Fender champ circuit low output.
  31. ekco ui59 receiver
  32. simple heater question .....
  33. Different Differential Pairs
  34. Decware Zen SET (first project/90% finished)
  35. YL-1200 for audioamp
  36. 7984's
  37. Building First Preamp HELP
  38. Aikido All-In-One Octal B+ measurement.
  39. OPT PP for GU50 Triode ?
  40. Requesting input on preamp schematic
  41. Longer life 6CA7's for class A
  42. Organ split
  43. Two amps done and done!
  44. Testing the 5842/417a on Sencore MU150?
  45. Why Class A Guitar Amplifiers Sound So Good ........
  46. Tube ID
  47. How to best drive an 845?
  48. K-16ls + ton pcb (just finished pics)
  49. Helios + Pultec tube EQ rack prototype.
  50. 12ax7 preamplifier with modified power supply!!! please help!
  51. tube amp prototype with pc
  52. Looking for a new diy project
  53. To James or to Baxandall?
  54. 45 triode : max 275 or 300 vdc ?
  55. Anyone with experience breaking in capacitors out of circuit?
  56. Vt-64/800 tube amp/preamp
  57. Hammond 1609 Output Transformer - EL84
  58. Chinese Capacitors
  59. 60 Watts A Channel 6528A Tube Amp
  60. AC or DC heathing?
  61. 1000W tube amplifier
  62. LEDs or RC?
  63. Is this amp worth bringing back to life?
  64. Melody PM845
  65. Need help troubleshooting this integrated.
  66. Wanted...design for D3a triode strapped driving 45
  67. Removing Tone Controls from VoM Preamp/Amp
  68. Philips 8580 useful anywhere?
  69. output transformer info
  70. 100Hz square preamp responce help
  71. 6P21s 6n21c tube, True Direct Heater?
  72. Convert Dogzilla for Hi-Fi output
  73. Bogen AP-35 Static and Pop from one channel
  74. EL34 PP triode mode hums
  75. Rectifiers
  76. Yaqin MC 10l problem
  77. Stripping Edcor's powder coating
  78. 5Y3 with slow warm up input and output tubes
  79. power transformer question
  80. DHT heaters . and their property"s
  81. Power Tube Cathode Resistor "distance"
  82. Does the same output power from tube amp and ss amp have difference?
  83. 32 Channel Microphone Preamp
  84. Field coil questions
  85. MC240 found in a shed.
  86. "Impossible" circuit which seems to amplify anyway.
  87. EL84 driving EL84 SEP
  88. Tube buffer for MosFet Citation 12
  89. Building a better power Triode
  90. Original KT88? or not
  91. Moscode 300 Upgrade
  92. Onwer's Manual for Realistic SAF-24D
  93. 2 stage Stereo/4 Stage Mono Triode Preamp with independent drive control & inverters
  94. 6J4 Experiment!
  95. Anyone build Broskie's T8 OTL?
  96. Just WHY are DHT tubes SO Expensive....?
  97. Two chassis grounding
  98. Tubes vs. Caps?
  99. Impedance and output transformer selection question
  100. Preamp tube SRPP 12AU7 VS preamp tube Aikido 12AU7 = all use rec 6X5GT
  101. peavey tube amplifiers
  102. Stark 9-66 tester repair
  103. 5e7 bandmaster build q's
  104. What kind of tube did I use back then?
  105. Wanted: Vacuum Tube Phono Preamp for PAS
  106. Lower gain in YS Audio linestage
  107. Converting 12FQ8 for 12AX7 , HELP !!!
  108. Transformer Inquiry
  109. Gibson BR-9 Tube Amp Issues
  110. Stromberg-Carlson AU-35 PA Amp for Guitar
  111. Pitfalls of paralleling different resistor brands?
  112. Question about rp and the AC load line
  113. KTA-HiFi ST-70 pcb or marantz 8b. HiFi build
  114. What is it about SET's?
  115. Help with Power cable on guitar amp
  116. The Russian Connection - (Maybe) A build thread. (KT88 SEP)
  117. A small help with russian low voltage tube
  118. Acoustic (not Audio) Alchemy Labs
  119. Mullard 404? ECL82 amp
  120. OP & tube power transormers
  121. EML 300B-XLS Schematic?
  122. Experiences with TAD EL34?
  123. C3g simulation model
  124. ok maybe im just a newb when it comes to amps but...
  125. Yet another compactron to play with...
  126. Weird heater arrangement 12ax7/6bm8
  127. I love SET can we fix what I hate?
  128. Tony's 6H32 pre-amp
  129. rebias guitar amp if using same tubes???
  130. To tone control or not to...
  131. EL84 plate voltage.
  132. 6bx7
  133. Anyone in the L.A. area with scope willing to troubleshoot?
  134. Transformers in series OK?
  135. Russian 6CA4/EZ81 Equivalent?
  136. Amp build recomendation.. for Frazier model sevens
  137. How can I make a DIY AC probe for my DMM
  138. PSUDII Question
  139. EH KT88 Glowing Welds?
  140. Not quite DIY
  141. Searching for a TUBE datasheet GE GL-421
  142. 6EM7 Unit 1
  143. woohoo! RDH4!!!
  144. VTL hum
  145. Use CL-90 to slow 5Y3?
  146. Allen Wright, 1947-2011
  147. Octaves/Ghost notes from Bogen K10. Caps?
  148. Q1, 300B S-Splot, 360V 60mA? Q2, James 6112HS or 6123HS?
  149. What audio output xfmr for a 6BM8 pp amp?
  150. Parafeeding an EL84 SE(T)
  151. Interesting video from the production of KR tubes
  152. Gassy WE 300b
  153. Bogen Pa Identification 6l6 x 4 dual rectifier
  154. SE output transformer DIY
  155. Tektronix TDS714L or other Tek TDS series digital oscilloscope for stereo?
  156. AA 151 or Scott 222
  157. Toroidal Output Transformer
  158. Hytron HY615 Data ???
  159. Can I use a 12AX7 with CT 6.3V?
  160. torroidal power transformers
  161. What amp is this
  162. B+ ramping up before CCS filament - danger?
  163. Telefunken Magnetophon 85 --> EL95 Guitar amp
  164. Recommend a good plate choke for 26 tube!!
  165. S11E12 TUBES
  166. Low dropout 6.3v
  167. how to adjust the filament power ecc83
  168. Cary/AES - AE3 Linestage Help Needed !
  169. 5867a
  170. 6V6/12AX7 Project Question/Help
  171. Ultra Linear Push Pull Tube amp
  172. A little help with 6v6 screen needed.
  173. Output Transformers... Decisions Decisions
  174. Need Help. PSU not voltage down from design
  175. D/A preamp FFT measurements for review plz
  176. Type 40, 12A, 112A(syl)
  177. American Audio Picker
  178. one half of a tube in schematic????
  179. estimating power rating of Telefunken transformer
  180. Where is mistake??
  181. Building a 6s45P amp - transformer help
  182. High-End preamplifier with ECC82!
  183. Attempting to recap a couple of old Ampex 2010 suitcase amps
  184. Hi specs rectifier needed
  185. Lux 6056N Intertstage Transformer
  186. Aikido Line Stage / Buffer
  187. JJ KT88s and other octals
  188. Triodes from Russia
  189. Little help needed / do I have a bad tube or really good tube?
  190. 5.1 channel 807 SE amplifier
  191. Plate loaded 6N6P over SRPP 6N6P any day of the week...
  192. Voltage multiplier vs transformer for preamp HV power supply
  193. does tube bias drift like silicon devices
  194. What are the best pots for less than $50 each?
  195. Best EL34 For Triode mode
  196. ASL AQ 1002 PP KT88 problem with input stage
  197. 2A3 Amp schematic suggestions?
  198. what I need for safe use mercury rectifier
  199. Anybody listened to Glow Audio?
  200. Tubes too close to output transformers?
  201. Help with stereo to mono for project
  202. MC3500 with 807 tubes and modern driver tubes
  203. Multiple Film Caps in parallel, Problems?
  204. I need a project......preferably a HIFI amp..........
  205. Aguilar DB-900 question
  206. REN904 for linestage?
  207. Urgent advice on Chinese purchase please!
  208. VR tubes, minimum current
  209. Senior Project Tube Preamp
  210. Antek AS-4T430 measurements
  211. small, light dc coupled 6ea7 amp sanity check
  212. 6S33S SE Transformer Set
  213. I think I blew my amp!! plase help
  214. Genalex VS Mullard 12AT7 & 12AX7's HUGE DIFF?
  215. testing 6550's on a Hickok 539b, same as KT88?
  216. 9V tube drive pedals - worth it?
  217. Music Angel XD-850MKIII 300b integrated amp
  218. 8150's
  219. More junk from China
  220. 6GM8 above 8mA/24V
  221. One Tube Sound Better Than Four?
  222. HK Citation V rebuild - any advice?
  223. 6GM8/ECC86
  224. Sound Valves vtp-101 Schematic
  225. ~17-18w sweep tube with large plate cap
  226. Fisher 500B Comparison
  227. New build of P-P PCL86 Amp
  228. Transformer question
  229. Can 110V Quad IIs be configured to 220V?
  230. Advice needed re repairing Audio Research VT100
  231. Yaqin SD-CD3 Tube Buffer - upgrading caps
  232. Best value speakers
  233. Peavey Windsor Studio The output tube El 34 burned out
  234. Gyrator PSU's in tube amps
  235. EL34 Amp Running KT66, Safe ?
  236. MJ Optimized Valve Regulator
  237. Need JAN 6418 tube stereo headphone preamp kit advice!
  238. Electronic choke
  239. Can you please help identifying this amp?
  240. [TubeAmp] Beginner's questions
  241. .47uF output cap to 1uF?
  242. Spark gaps on output transformers
  243. St 35 or St 70?
  244. Pi wound output transformers
  245. miniatures 6n1p 6n2p
  246. Begginer questions about a guitar pre amp
  247. HK Citation V schematic?
  248. Help! can't find ef86 on my Hickok 539b roll chart! and need a tube project
  249. Physical Oscillating noise from phono stage
  250. PP 6c33c-b

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