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  1. My little 801A power amplifier
  2. Help needed finding a small DPST switch - confused!
  3. Help with bias pot- wont adjust!
  4. 6N6P / ECC99 / E182CC
  5. bias question
  6. Really low parts could el84 pp design for a beginner?
  7. moviola tubes -- other names?
  8. DHT with TDA1541A in a NOS DAC?
  9. 6C33C-B Tube Tester
  10. VT100mk2 - Retubing
  11. Parallel 6L6 se iron suggestion.
  12. 6N2 Tube Srpp Drive Stage
  13. Unexpectedly good EL84 amp
  14. Kypo Electronic - Buffer, Preamp & Amp kits
  15. PSU bypass cap type
  16. Yaqin MC10-T
  17. Yaqin MC10-L Need help collating data
  18. Wanted: High Quality Complete tube NOS DAC with TDA1541A
  19. 6360 or 6939 as a phase inverter
  20. Peerless 16687 & 7142 Transformer Identification
  21. Wanted: High Quality DIY Tube NOS DAC with TDA1541A
  22. Restoration of leak stereo 20: advice pls
  23. DC Tube Heaters
  24. Musical Paradise MP-428 300B Amplifier
  25. Tube regulator
  26. Why overvoltage on HT?
  27. 50c5 schematic question
  28. Me again... matrix decoding w/ tubes?
  29. chapman 305 transformer wiring
  30. tube rolling el34 need advice
  31. Adding resistance to OT circuit.
  32. Tube pre-amp + Class-D amp. any experience?
  33. Bias using a ccs as an anode load
  34. Magnepan High Frequency Tube Amp
  35. Home-Made Plate Curves
  36. Vacuum Tube Audio PH-11
  37. Latest project SRPP valve front end with class D MOSFET output stage.
  38. Melos 400 restoration project - need help (unaltered reference needed)
  39. Comparison of Sovtek 5751 and RCA 5751
  40. Heater supply for the 866a
  41. How good is good enough when designing a line stage?
  42. Cathode/plate resistors ??
  43. Tubes and LTspice?
  44. Is this an oscillation problem? -broskie CCA linestage
  45. Simple Octal SET help.
  46. Capacitor Sanity Check
  47. VTVM substitute?
  48. What music/sound style for 845 tubes?
  49. Advice Needed
  50. Favorite ouput tube (SE only)
  51. Best make of audio valves/tubes
  52. How to calculate source impedance for audio transformer?
  53. what the best kit for Dynaco
  54. That mystery trem cap
  55. A Hot Rodded Bottlehead S.E.X. Amplifier
  56. Cheap Chinese amps
  57. Who makes their own OPT around here?
  58. 71A
  59. Sound quality chinese tube amplifiers
  60. freeware circuit simulator for Osx (Mac)
  61. 12ax7LP substitute
  62. RH84 SE Build and custom Edcor power transformer
  63. 6l6 se primary impedance choice
  64. Luxman SQ38FD mkII, schematic
  65. 6c33 SET (my next project). Need some feedback
  66. Amorphous iron UMCCC-125: what would you do from it?
  67. Old Fisher SA-300 Amp help!
  68. What kind of sound does a noisy 12B4 make ??
  69. KT88 bias current keeps drifting
  70. Oddball Tube - Useful for Audio??
  71. 12AX7 dual triode "Signal Enhancer/Conditioner"
  72. 2nos of 6l6 in Parallel SE mode
  73. Output transformer selection
  74. 5C8S rectifier psud2 modle/rectifier information
  75. EF80 / KT77 SIngle Ended
  76. Longevity of output tubes in triode vs pentode
  77. ekco ui59 receiver
  78. simple heater question .....
  79. Different Differential Pairs
  80. Decware Zen SET (first project/90% finished)
  81. YL-1200 for audioamp
  82. 7984's
  83. Building First Preamp HELP
  84. Aikido All-In-One Octal B+ measurement.
  85. OPT PP for GU50 Triode ?
  86. Requesting input on preamp schematic
  87. Longer life 6CA7's for class A
  88. Organ split
  89. Two amps done and done!
  90. Testing the 5842/417a on Sencore MU150?
  91. Tube ID
  92. How to best drive an 845?
  93. K-16ls + ton pcb (just finished pics)
  94. Helios + Pultec tube EQ rack prototype.
  95. 12ax7 preamplifier with modified power supply!!! please help!
  96. tube amp prototype with pc
  97. Looking for a new diy project
  98. To James or to Baxandall?
  99. 45 triode : max 275 or 300 vdc ?
  100. Anyone with experience breaking in capacitors out of circuit?
  101. Vt-64/800 tube amp/preamp
  102. Hammond 1609 Output Transformer - EL84
  103. 60 Watts A Channel 6528A Tube Amp
  104. AC or DC heathing?
  105. 1000W tube amplifier
  106. LEDs or RC?
  107. Is this amp worth bringing back to life?
  108. Melody PM845
  109. Need help troubleshooting this integrated.
  110. Wanted...design for D3a triode strapped driving 45
  111. Removing Tone Controls from VoM Preamp/Amp
  112. Philips 8580 useful anywhere?
  113. output transformer info
  114. 100Hz square preamp responce help
  115. 6P21s 6n21c tube, True Direct Heater?
  116. Convert Dogzilla for Hi-Fi output
  117. Bogen AP-35 Static and Pop from one channel
  118. EL34 PP triode mode hums
  119. Rectifiers
  120. Yaqin MC 10l problem
  121. Stripping Edcor's powder coating
  122. 5Y3 with slow warm up input and output tubes
  123. power transformer question
  124. DHT heaters . and their property"s
  125. Power Tube Cathode Resistor "distance"
  126. Does the same output power from tube amp and ss amp have difference?
  127. Field coil questions
  128. MC240 found in a shed.
  129. "Impossible" circuit which seems to amplify anyway.
  130. EL84 driving EL84 SEP
  131. Tube buffer for MosFet Citation 12
  132. Building a better power Triode
  133. Original KT88? or not
  134. Moscode 300 Upgrade
  135. Onwer's Manual for Realistic SAF-24D
  136. 2 stage Stereo/4 Stage Mono Triode Preamp with independent drive control & inverters
  137. 6J4 Experiment!
  138. Anyone build Broskie's T8 OTL?
  139. Just WHY are DHT tubes SO Expensive....?
  140. Two chassis grounding
  141. Tubes vs. Caps?
  142. Impedance and output transformer selection question
  143. Preamp tube SRPP 12AU7 VS preamp tube Aikido 12AU7 = all use rec 6X5GT
  144. What kind of tube did I use back then?
  145. Wanted: Vacuum Tube Phono Preamp for PAS
  146. Lower gain in YS Audio linestage
  147. Converting 12FQ8 for 12AX7 , HELP !!!
  148. Transformer Inquiry
  149. Question about rp and the AC load line
  150. KTA-HiFi ST-70 pcb or marantz 8b. HiFi build
  151. What is it about SET's?
  152. The Russian Connection - (Maybe) A build thread. (KT88 SEP)
  153. A small help with russian low voltage tube
  154. Acoustic (not Audio) Alchemy Labs
  155. Mullard 404? ECL82 amp
  156. OP & tube power transormers
  157. EML 300B-XLS Schematic?
  158. Experiences with TAD EL34?
  159. C3g simulation model
  160. ok maybe im just a newb when it comes to amps but...
  161. Yet another compactron to play with...
  162. Weird heater arrangement 12ax7/6bm8
  163. I love SET can we fix what I hate?
  164. Tony's 6H32 pre-amp
  165. To tone control or not to...
  166. EL84 plate voltage.
  167. 6bx7
  168. Anyone in the L.A. area with scope willing to troubleshoot?
  169. Transformers in series OK?
  170. Russian 6CA4/EZ81 Equivalent?
  171. Amp build recomendation.. for Frazier model sevens
  172. How can I make a DIY AC probe for my DMM
  173. PSUDII Question
  174. EH KT88 Glowing Welds?
  175. Not quite DIY
  176. Searching for a TUBE datasheet GE GL-421
  177. 6EM7 Unit 1
  178. woohoo! RDH4!!!
  179. VTL hum
  180. Use CL-90 to slow 5Y3?
  181. Allen Wright, 1947-2011
  182. Octaves/Ghost notes from Bogen K10. Caps?
  183. Q1, 300B S-Splot, 360V 60mA? Q2, James 6112HS or 6123HS?
  184. What audio output xfmr for a 6BM8 pp amp?
  185. Parafeeding an EL84 SE(T)
  186. Interesting video from the production of KR tubes
  187. Gassy WE 300b
  188. Bogen Pa Identification 6l6 x 4 dual rectifier
  189. SE output transformer DIY
  190. AA 151 or Scott 222
  191. Toroidal Output Transformer
  192. Hytron HY615 Data ???
  193. Can I use a 12AX7 with CT 6.3V?
  194. torroidal power transformers
  195. What amp is this
  196. B+ ramping up before CCS filament - danger?
  197. Recommend a good plate choke for 26 tube!!
  198. S11E12 TUBES
  199. Low dropout 6.3v
  200. how to adjust the filament power ecc83
  201. Cary/AES - AE3 Linestage Help Needed !
  202. 5867a
  203. 6V6/12AX7 Project Question/Help
  204. Ultra Linear Push Pull Tube amp
  205. A little help with 6v6 screen needed.
  206. Output Transformers... Decisions Decisions
  207. Need Help. PSU not voltage down from design
  208. D/A preamp FFT measurements for review plz
  209. Type 40, 12A, 112A(syl)
  210. American Audio Picker
  211. one half of a tube in schematic????
  212. estimating power rating of Telefunken transformer
  213. Where is mistake??
  214. Building a 6s45P amp - transformer help
  215. High-End preamplifier with ECC82!
  216. Attempting to recap a couple of old Ampex 2010 suitcase amps
  217. Hi specs rectifier needed
  218. Lux 6056N Interstage Transformer
  219. Aikido Line Stage / Buffer
  220. JJ KT88s and other octals
  221. Triodes from Russia
  222. Little help needed / do I have a bad tube or really good tube?
  223. 5.1 channel 807 SE amplifier
  224. Plate loaded 6N6P over SRPP 6N6P any day of the week...
  225. Voltage multiplier vs transformer for preamp HV power supply
  226. does tube bias drift like silicon devices
  227. Best EL34 For Triode mode
  228. ASL AQ 1002 PP KT88 problem with input stage
  229. 2A3 Amp schematic suggestions?
  230. what I need for safe use mercury rectifier
  231. Anybody listened to Glow Audio?
  232. Tubes too close to output transformers?
  233. Help with stereo to mono for project
  234. MC3500 with 807 tubes and modern driver tubes
  235. I need a project......preferably a HIFI amp..........
  236. REN904 for linestage?
  237. Urgent advice on Chinese purchase please!
  238. VR tubes, minimum current
  239. Senior Project Tube Preamp
  240. Antek AS-4T430 measurements
  241. small, light dc coupled 6ea7 amp sanity check
  242. 6S33S SE Transformer Set
  243. I think I blew my amp!! plase help
  244. Genalex VS Mullard 12AT7 & 12AX7's HUGE DIFF?
  245. testing 6550's on a Hickok 539b, same as KT88?
  246. 9V tube drive pedals - worth it?
  247. Music Angel XD-850MKIII 300b integrated amp
  248. 8150's
  249. More junk from China
  250. 6GM8 above 8mA/24V

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