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  1. 6N6P cascode calculation
  2. 866a Min operating voltages
  3. new 6V6 amp
  4. Tube-based CCS- 0.2uF cap OK?
  5. DHT filament PSU: What would you do?
  6. PSU problem
  7. 811A se amp using a solid state driver
  8. ECC83 - Long Plate vs Short Plate
  9. Tube Matching
  10. Cascoded mu-follower
  11. DIY speaker choice for SE
  12. Output transformer wanted
  13. Tube Tester
  14. 835 amp
  15. One 300B filament supply for stereo?
  16. Aikido Built At Last!!
  17. Question about amount of feedback to apply
  18. design help needed.
  19. LED in cathode
  20. Need help for Eico 1030 regulated power supply
  21. zinc chassis
  22. Anode Cap Question
  23. what pins to use solid rectifier for 5Y3
  24. New PSU for Aikido?
  25. tube anti-vibration mounting
  26. Border Patrol PSU, can anyone help?
  27. Aikido Line Stage
  28. LED Bias Modifications
  29. Standby switch for bridge rectified power supplies.
  30. Decoupling in Phono stages.
  31. easy one valve pre help
  32. Single-ended-series amp with a "1 winding" transformer
  33. Complementary Symmetry Output
  34. Help getting these d$&* Dynascan probes apart!
  35. Aikido output cap selector switch
  36. adding an "on" lamp to amp kit
  37. Why does 6BM8 have so high max plate voltage?
  38. B+ soft start
  39. Unison research
  40. photos of my creations
  41. First Time Project - Finished! Photos Attached
  42. Design parameters for SE OPTs'
  43. want to build a pentode driven drd 2a3!
  44. Passive Magnetic Preamp!
  45. Testing an E288CC (8223)
  46. Need expert help on presence control
  47. Value of output caps for Aikido - how low is too low?
  48. Very expensive WE106A pre-amp, any member had this??
  49. B+ with or without tubes?
  50. 1st Time Project - Spot the howler
  51. Tube flashes on tester... Bad ?
  52. Amp advice needed for a poor DIY er...
  53. DCR of primaries and secondaries of Hammond Transformer
  54. 801 amp with Power Drive
  55. Where did this come from?
  56. 6N7S's PPP Class A
  57. your opinion needed.......
  58. ST-70 strangeness
  59. SS preamp w/ tube amp
  60. pri. impedance vs. sek. impedance
  61. TubeLab SimpleSe and speaker efficiency
  62. Question about speaker transformer
  63. How to read Russian Date Codes
  64. 300B Amp on ebay
  65. Would a 396A or 2C51 drive a 45?
  66. PSUD2 Q on regulator
  67. My last design
  68. OPT for 250th Se A2
  69. 829B, 3E29, QQV03-20 Connector
  70. Measuring from UK schematic but on US mains
  71. strange tube
  72. cathode resistor ?? in p-p fixed bias
  73. Need Help please . Headphones into line up of tube amp .
  74. 5Z4 inrush current too high
  75. Reducing gain on Audible Illusions M3A
  76. Decoding output transformers: strange SE's
  77. cheap and usable for 1K p-p iron?
  78. Help! Phono stage LF instability
  79. Help! Mesa Stiletto is motorboating and then fuse blows
  80. Faulty tube?
  81. Philbrick opamp bases
  82. Hammond Driver transformers
  83. 6n7/2a3
  84. Flea power for cheap OPT's?
  85. 1st Project - Half time report
  86. Claus Byrith 4-30 Questions
  87. quicksilver 8417 biasing
  88. 6sl7
  89. Trying to identify/find documentation on a 50EH5 amp
  90. Basic tests and measurements for OPTs
  91. 6SN7GT SRSE Linestage
  92. Dynaco Mark III
  93. Push Pull 300B preliminary
  94. triode thermodynamic model
  95. My first post!
  96. A Neophyte's 12B4 Build Thread
  97. Webster Hammond Model "G" amplifier
  98. Matching tubes- WE 396a/RFT EL34
  99. What is the most powerful AF tube amp ever built?
  100. SOHA Amp & PSU Layout, need feedback
  101. smoke came from transformer
  102. Startup Cost?
  103. Old or new output transformer?
  104. speaker magnet proximity Question
  105. Russian L3-3 tube tester
  106. I made a web page on building triode models /w CurveCaptor
  107. Boosted Triode mode?
  108. Unbalacing a PP output transformer?
  109. Double C Cores
  110. Aikido Power Supply
  111. Output Noise question
  112. Power Supply Ringing
  113. Compare Sowter SA08 with Plitron 3035SE for 300B
  114. My 6C33C SING WITH No SPEAKER !
  115. MOSFET Driver for Power Pentodes
  116. Floating heater supplies
  117. Altec Amplifiers
  118. What causes the overrun bias on V4?
  119. sound comparison of Class A1 vs A2 amps
  120. 12AU7 substituted for a 6922
  121. Whats the worst that could happen?
  122. Ferranti transformers
  123. PC Cooling Fans for Tube Amps
  124. 845 circuit suggestions
  125. DIY Sofia tube tester?
  126. transformer hum / buzz getting into B+?
  127. Safe Transformerless Amps Possible?
  128. GM70 Lower Voltage PP Question
  129. phonostage with 150VDC B+
  130. Spuddo more powerfull
  131. Larry Moore 300B/10Y/6SN7GT
  132. Foreplay Preamp volume popping
  133. Altec Tube Amplifiers
  134. Circuit review
  135. DIY Tube Tester for 6336s
  136. 12dw7 to 12ax7 conversion?
  137. 26 preamp
  138. Etf07
  139. 1st Project Heater Wiring
  140. Dropped tube
  141. Great bench supply for tube work.
  142. Mullard px25 - need matched pair
  143. 2W carbon composit ressy
  144. popping noise through 1 channel on Radford STA15
  145. Point to point wiring help
  146. 1st Time Project - Report 2 + advice sought
  147. "Simple" 2A3
  148. vinyl v cd differences - phono pre and cd-player
  149. Shielded input cable
  150. Coupling caps in ST35
  151. Mentmore M100
  152. How to match tubes?
  153. Transcendent OTL T8 Vs. Atma-Sphere M60
  154. New 12AX7A Pspice model
  155. What does R2D2, Mickey Mouse and a...
  156. Why 5V filament
  157. Alloys for filaments
  158. 6360 as Power Tube for SE amp
  159. Bridging Stereo Amps
  160. Problem with 6L6 Monoblock
  161. Gain
  162. Proper grounding method...
  163. Changing a tube amp...
  164. Houston Mini 2004 Pot question
  165. Diode Heatsink
  166. Looking for a PCB / kit for a bipolar tube rectified PSU
  167. compactron output stage and power supply
  168. Better sounding ECL86's
  169. interesting amp & interesting problem
  170. Hybrid Tube / Mosfet Amplifier
  171. Again (sorry) what's the biggest 6V heater double rectifier?
  172. PP EL34 circuit wanted
  173. Need advice for transformer for tube GM 70.
  174. Pentode filter
  175. How to calculate for cathode follower
  176. 6L6WXT in a Dynaco ST-70
  177. tube preamp using submini tube
  178. SE Trafo for PP use
  179. WE91A Pentode Questions?
  180. Lower voltage Dynaco ST35 for 6P14P // 7247 replacement
  181. looking for schematic; three EL84's in PSE ?
  182. Need work done on a dynaco power amp
  183. quick question on fixed bias
  184. DIY Tube Audio dealers in New Zealand
  185. ornec
  186. Tuner filament supply question
  187. An idea for a partial feedback pentode amp using 6AU6's and 807's
  188. Tube current regulation for series heaters' supply.
  189. Bogen PCA-1 two tube booster amp
  190. First time building a tube preamp
  191. B&K 700 problems?
  192. Voltage Multipliers
  193. Russian 6P14P tubes
  194. Where to get tube spec sheets, pinouts
  195. PCL 82 Hybrid 2SC5200/2SA1943
  196. CCS in Otput Tube Cathode - Does It Make Sense?
  197. My brew of the "Darling"
  198. Series connection of filaments
  199. noisy filament transformer
  200. Circuit diagram for Trilogy VTi.
  201. Got oddball tubes!
  202. A photo for my question
  203. Make a preamp with an already buil amplifier
  204. DN2540
  205. mods for almarro amp
  206. Filament Transformer
  207. Circuit indentification
  208. Simplest Tube Regulated PSU?
  209. High Voltage Insulator for Umbilical
  210. wiring diagram, instruction on the transformer S-265-Q
  211. help me get started
  212. 12AU7 instead of 6C4
  213. Fisher 600 questions
  214. Phase inverter
  215. srpp input stage
  216. Orientation of EL34 Tubes
  217. Load termination ?
  218. Advice on SE DHT for Lowther Fidelio DX2
  219. Dynacord MV46 as a compressor
  220. Biggest dual triode output tube?
  221. OPT impedance question
  222. Partridge SE O/P transformers
  223. SimpleSE and me
  224. SRPP decoupling cap vs. output transformer
  225. Differences between 6SN7GTA and 6SN7GTB?
  226. Radford STA-15 questions
  227. Balanced Input Hookup
  228. Need Tube Testing Settings for 3 tubes
  229. Need helping in Grounded Grid preamp using 6H6P 6H30P
  230. Regulated Lab DC power supply
  231. Fixed Bias 6BQ5?
  232. Heathkit AG7 Audio Geneator
  233. Music Angel vs Mr Liang L1-L3? And best speakers for 3k budget?
  234. NEWBIE question SET vs. Solid State
  235. 6N6P cascode + 6AS7 Cathode follower
  236. Help me calculator OPT for 807, 6C4C tubes.
  237. Now I have caught the bug - next project
  238. 20W cathode follower amplifier
  239. Muting line level signals
  240. Anywhere in Hong Kong...
  241. RIAA / Pre mod/upgrade
  242. IT WORKS! Tube Phono Stage
  243. 2033 info sought
  244. Pentode Zeus
  245. 5987 (sc968b)
  246. Low Voltage Plate Follower 6DJ8 Buffer Power Supply
  247. JAN Sylvania 7308 vs. JAN Sylvania 6922
  248. recording amp
  249. A Tee-Vee T00b Amp
  250. Locating a bad resistor

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