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  1. Help needed finding a small DPST switch - confused!
  2. Help with bias pot- wont adjust!
  3. 6N6P / ECC99 / E182CC
  4. bias question
  5. Really low parts could el84 pp design for a beginner?
  6. moviola tubes -- other names?
  7. DHT with TDA1541A in a NOS DAC?
  8. 6C33C-B Tube Tester
  9. VT100mk2 - Retubing
  10. Parallel 6L6 se iron suggestion.
  11. 6N2 Tube Srpp Drive Stage
  12. Unexpectedly good EL84 amp
  13. Kypo Electronic - Buffer, Preamp & Amp kits
  14. PSU bypass cap type
  15. Yaqin MC10-T
  16. Yaqin MC10-L Need help collating data
  17. Wanted: High Quality Complete tube NOS DAC with TDA1541A
  18. 6360 or 6939 as a phase inverter
  19. Peerless 16687 & 7142 Transformer Identification
  20. Wanted: High Quality DIY Tube NOS DAC with TDA1541A
  21. Restoration of leak stereo 20: advice pls
  22. DC Tube Heaters
  23. Musical Paradise MP-428 300B Amplifier
  24. Tube regulator
  25. Why overvoltage on HT?
  26. 50c5 schematic question
  27. Me again... matrix decoding w/ tubes?
  28. chapman 305 transformer wiring
  29. tube rolling el34 need advice
  30. Adding resistance to OT circuit.
  31. Tube pre-amp + Class-D amp. any experience?
  32. Bias using a ccs as an anode load
  33. Magnepan High Frequency Tube Amp
  34. Home-Made Plate Curves
  35. Vacuum Tube Audio PH-11
  36. Latest project SRPP valve front end with class D MOSFET output stage.
  37. Melos 400 restoration project - need help (unaltered reference needed)
  38. Comparison of Sovtek 5751 and RCA 5751
  39. Replacing electrolytic caps
  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. Schematic for REDDi DI-Box?
  54. what the best kit for Dynaco
  55. That mystery trem cap
  56. A Hot Rodded Bottlehead S.E.X. Amplifier
  57. Cheap Chinese amps
  58. Wanted: Leak ST-50 Mains transformer 240V
  59. Who makes their own OPT around here?
  60. 71A
  61. Sound quality chinese tube amplifiers
  62. freeware circuit simulator for Osx (Mac)
  63. 12ax7LP substitute
  64. RH84 SE Build and custom Edcor power transformer
  65. 6l6 se primary impedance choice
  66. Luxman SQ38FD mkII, schematic
  67. 6c33 SET (my next project). Need some feedback
  68. Amorphous iron UMCCC-125: what would you do from it?
  69. Old Fisher SA-300 Amp help!
  70. What kind of sound does a noisy 12B4 make ??
  71. KT88 bias current keeps drifting
  72. Oddball Tube - Useful for Audio??
  73. 12AX7 dual triode "Signal Enhancer/Conditioner"
  74. 2nos of 6l6 in Parallel SE mode
  75. Output transformer selection
  76. 5C8S rectifier psud2 modle/rectifier information
  77. EF80 / KT77 SIngle Ended
  78. Longevity of output tubes in triode vs pentode
  79. ekco ui59 receiver
  80. simple heater question .....
  81. Different Differential Pairs
  82. Decware Zen SET (first project/90% finished)
  83. YL-1200 for audioamp
  84. 7984's
  85. Building First Preamp HELP
  86. Aikido All-In-One Octal B+ measurement.
  87. OPT PP for GU50 Triode ?
  88. Requesting input on preamp schematic
  89. Longer life 6CA7's for class A
  90. Organ split
  91. Two amps done and done!
  92. Testing the 5842/417a on Sencore MU150?
  93. Tube ID
  94. How to best drive an 845?
  95. K-16ls + ton pcb (just finished pics)
  96. Helios + Pultec tube EQ rack prototype.
  97. 12ax7 preamplifier with modified power supply!!! please help!
  98. tube amp prototype with pc
  99. Looking for a new diy project
  100. To James or to Baxandall?
  101. 45 triode : max 275 or 300 vdc ?
  102. Anyone with experience breaking in capacitors out of circuit?
  103. Vt-64/800 tube amp/preamp
  104. Hammond 1609 Output Transformer - EL84
  105. Chinese Capacitors
  106. 60 Watts A Channel 6528A Tube Amp
  107. AC or DC heathing?
  108. 1000W tube amplifier
  109. LEDs or RC?
  110. Is this amp worth bringing back to life?
  111. Melody PM845
  112. Need help troubleshooting this integrated.
  113. Wanted...design for D3a triode strapped driving 45
  114. Removing Tone Controls from VoM Preamp/Amp
  115. Philips 8580 useful anywhere?
  116. output transformer info
  117. 100Hz square preamp responce help
  118. 6P21s 6n21c tube, True Direct Heater?
  119. Convert Dogzilla for Hi-Fi output
  120. Bogen AP-35 Static and Pop from one channel
  121. EL34 PP triode mode hums
  122. Rectifiers
  123. Yaqin MC 10l problem
  124. Stripping Edcor's powder coating
  125. 5Y3 with slow warm up input and output tubes
  126. power transformer question
  127. DHT heaters . and their property"s
  128. Power Tube Cathode Resistor "distance"
  129. Does the same output power from tube amp and ss amp have difference?
  130. 32 Channel Microphone Preamp
  131. Field coil questions
  132. MC240 found in a shed.
  133. "Impossible" circuit which seems to amplify anyway.
  134. EL84 driving EL84 SEP
  135. Tube buffer for MosFet Citation 12
  136. Building a better power Triode
  137. Original KT88? or not
  138. Moscode 300 Upgrade
  139. Onwer's Manual for Realistic SAF-24D
  140. 2 stage Stereo/4 Stage Mono Triode Preamp with independent drive control & inverters
  141. 6J4 Experiment!
  142. Anyone build Broskie's T8 OTL?
  143. Just WHY are DHT tubes SO Expensive....?
  144. Two chassis grounding
  145. Tubes vs. Caps?
  146. Impedance and output transformer selection question
  147. Preamp tube SRPP 12AU7 VS preamp tube Aikido 12AU7 = all use rec 6X5GT
  148. What kind of tube did I use back then?
  149. Wanted: Vacuum Tube Phono Preamp for PAS
  150. Lower gain in YS Audio linestage
  151. Converting 12FQ8 for 12AX7 , HELP !!!
  152. Transformer Inquiry
  153. Pitfalls of paralleling different resistor brands?
  154. Question about rp and the AC load line
  155. KTA-HiFi ST-70 pcb or marantz 8b. HiFi build
  156. What is it about SET's?
  157. The Russian Connection - (Maybe) A build thread. (KT88 SEP)
  158. A small help with russian low voltage tube
  159. Acoustic (not Audio) Alchemy Labs
  160. Mullard 404? ECL82 amp
  161. OP & tube power transormers
  162. EML 300B-XLS Schematic?
  163. Experiences with TAD EL34?
  164. C3g simulation model
  165. ok maybe im just a newb when it comes to amps but...
  166. Yet another compactron to play with...
  167. Weird heater arrangement 12ax7/6bm8
  168. I love SET can we fix what I hate?
  169. Tony's 6H32 pre-amp
  170. To tone control or not to...
  171. EL84 plate voltage.
  172. 6bx7
  173. Anyone in the L.A. area with scope willing to troubleshoot?
  174. Transformers in series OK?
  175. Russian 6CA4/EZ81 Equivalent?
  176. Amp build recomendation.. for Frazier model sevens
  177. How can I make a DIY AC probe for my DMM
  178. PSUDII Question
  179. EH KT88 Glowing Welds?
  180. Not quite DIY
  181. Searching for a TUBE datasheet GE GL-421
  182. 6EM7 Unit 1
  183. woohoo! RDH4!!!
  184. VTL hum
  185. Use CL-90 to slow 5Y3?
  186. Allen Wright, 1947-2011
  187. Octaves/Ghost notes from Bogen K10. Caps?
  188. Q1, 300B S-Splot, 360V 60mA? Q2, James 6112HS or 6123HS?
  189. What audio output xfmr for a 6BM8 pp amp?
  190. Parafeeding an EL84 SE(T)
  191. Interesting video from the production of KR tubes
  192. Gassy WE 300b
  193. Bogen Pa Identification 6l6 x 4 dual rectifier
  194. SE output transformer DIY
  195. Tektronix TDS714L or other Tek TDS series digital oscilloscope for stereo?
  196. AA 151 or Scott 222
  197. Toroidal Output Transformer
  198. Hytron HY615 Data ???
  199. Can I use a 12AX7 with CT 6.3V?
  200. torroidal power transformers
  201. What amp is this
  202. B+ ramping up before CCS filament - danger?
  203. Recommend a good plate choke for 26 tube!!
  204. S11E12 TUBES
  205. Low dropout 6.3v
  206. how to adjust the filament power ecc83
  207. Cary/AES - AE3 Linestage Help Needed !
  208. 5867a
  209. 6V6/12AX7 Project Question/Help
  210. Ultra Linear Push Pull Tube amp
  211. A little help with 6v6 screen needed.
  212. Output Transformers... Decisions Decisions
  213. Need Help. PSU not voltage down from design
  214. D/A preamp FFT measurements for review plz
  215. Type 40, 12A, 112A(syl)
  216. American Audio Picker
  217. one half of a tube in schematic????
  218. estimating power rating of Telefunken transformer
  219. Where is mistake??
  220. Building a 6s45P amp - transformer help
  221. High-End preamplifier with ECC82!
  222. Attempting to recap a couple of old Ampex 2010 suitcase amps
  223. Hi specs rectifier needed
  224. Lux 6056N Interstage Transformer
  225. Aikido Line Stage / Buffer
  226. JJ KT88s and other octals
  227. Triodes from Russia
  228. Little help needed / do I have a bad tube or really good tube?
  229. 5.1 channel 807 SE amplifier
  230. Plate loaded 6N6P over SRPP 6N6P any day of the week...
  231. Voltage multiplier vs transformer for preamp HV power supply
  232. does tube bias drift like silicon devices
  233. What are the best pots for less than $50 each?
  234. Best EL34 For Triode mode
  235. ASL AQ 1002 PP KT88 problem with input stage
  236. 2A3 Amp schematic suggestions?
  237. what I need for safe use mercury rectifier
  238. Anybody listened to Glow Audio?
  239. Tubes too close to output transformers?
  240. Help with stereo to mono for project
  241. MC3500 with 807 tubes and modern driver tubes
  242. Multiple Film Caps in parallel, Problems?
  243. I need a project......preferably a HIFI amp..........
  244. Aguilar DB-900 question
  245. REN904 for linestage?
  246. Urgent advice on Chinese purchase please!
  247. VR tubes, minimum current
  248. Senior Project Tube Preamp
  249. Antek AS-4T430 measurements
  250. small, light dc coupled 6ea7 amp sanity check

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