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  1. BP Ultrapath
  2. Tube shops/sellers in Kiev , Ukraine ?
  3. Headphones with tubes...
  4. A Triad xfmr for a voltage doubler PSU
  5. Ra-100
  6. Series Resistors on Outputs of Transformer?
  7. what's up !? new choke=subsonic pumping
  8. How to get the best out of the 6C33C-B?
  9. TO-220 PCB spacing for HV MOSFETs
  10. Need input on Buffer stage to use in Preamp..
  11. quad output tube help
  12. "Stacking" power transformer secondaries?
  13. Tubes flare on start up!!
  14. Grid Stopper Advice - Graphs Included!
  15. Western Electric settings for Hickok 600A?
  16. Wanted! single-ended 807 schematic
  17. sputtering 5u4 on diy Wheatfield amp
  18. Is this output transformer faulty?
  19. Help identify variac
  20. Schematic for TL Audio VP-5051 Voice Processor
  21. what's a good layout for a quad EL84 amp on this box?
  22. Scott 350B Tuner; Bridge Rectifier
  23. intermitent static pops from speakers st70
  24. baxandall type tone control for diff amp
  25. Stage amps using DHTs
  26. Tube+OP My headphono & preamp
  27. NFB Clarification
  28. James output transformers
  29. I just bought a an old valve amp
  30. Bias Curves
  31. Triode in Class B or Beam Pentode in Class AB2
  32. Elna Cerafine Caps
  33. help with calibrating a Tv7d/U military tube tester
  34. Cathode Follower driven Phase Inverters
  35. Help finding a tube tester for Stereo tube amps.
  36. Anything horribly wrong with this (LTP w/ LM317 as CCS)
  37. Zenith OPT question
  38. OT/Speaker impedance mismatch
  39. Goldilocks & the 3 (or more) preamp power supplies
  40. Using SE OT for PP.
  41. Need preamplifier schematic/suggestions
  42. Push-Pull vs Push-Pull-Parallel
  43. Odd/Crazy output transformer design?
  44. what 2A3 desgin recommented for home theater
  45. power supply for 10m45s
  46. How badly matched are your IXYS10M45S ?
  47. Class B Push-Pull
  48. Please comment on my design -and a few resistor values..
  49. How to lower even harmonic, keep odd one
  50. PC Mount 9-Pin Tube Socket Layout
  51. datasheet for type 52, help !!!
  52. Another kt88 Monoblock Builders Thread
  53. Question about stacked pawer supplies
  54. ys audio preamp
  55. Need help on 811A partial feedback
  56. Funny console, need ideas...
  57. SMPS experts come on in please!
  58. DC Filament supply boards
  59. Looking for vintage radio sound
  60. Channel death - Chinese EL34 PP
  61. JFET cascoded with tube gain calculation
  62. Fet 6Gk5 ECC88 mc phono stage
  63. Heathkit ol-1 oscilloscope help. Can't get solid spot during setup procedure.
  64. Operating a stereo amp in bridged mode
  65. Mic input Transformer from Triode Elect
  66. Power transformer for tube amp requirements
  67. Tape playback amp
  68. Eico 666 tube tester restoration - need grid control!
  69. Need Schematic/Manual Lambda 71
  70. Replace ECC83 preamp valve with E88CC(6922)
  71. Advice on 6P3S p-p amp schematic, feedback problem?
  72. 6S41S P-P Amp Initial Query
  73. El Cheapo, builders thread
  74. kbu608 rectifier
  75. Looking for nice sounding amp project
  76. B+ for EL84
  77. Output Transformer kt88 6550 pp, Wires? Jukebox? Help.
  78. OPT with foil secondaries
  79. Small Tube Pre Amp - Power Supply Cable
  80. Identification of unknown output transformer
  81. master volume with a extra tube
  82. 10 pounds of power for $15
  83. Unstable Eico HF-87
  84. DIY Dual Channel Active Tube Tone Control
  85. cant eliminate 50hz hum on just one side of the 6h6p headphoneamp
  86. question about the 866a
  87. Trade Custom Speaker Horns for Custom Amp
  88. TVA-1 valve amp - help
  89. Need to source a PSU chassis - simple steel
  90. What should I do with my Dynaco MKIII's
  91. inrush current
  92. Scott 222B output transformer : Compatibility and specs
  93. C3G/C3M Prices
  94. 5v3, 5u4, 5u4gb, 5u4gbm, 5931?
  95. transformer for quad EL84 SE amp - will Antek 360v work
  96. Best Possible Tube Headphone Amp
  97. Help with cheap mono SE
  98. Millkido 24
  99. 60W mono's design help
  100. Psu question - best place for the caps?
  101. RCA jacks
  102. Hickok 530-B tester charts wanted
  103. comparison of heater termination noise
  104. Some questions about an amplifier design
  105. 2nd harmonic feedback
  106. idea's for a valve preamp
  107. Best line stage tube?
  108. Bias Adjustment point
  109. Looking for a Williamson squematics
  110. Magnavox Console Speaker Impedances
  111. first tube amp
  112. Beam Triodes
  113. Winding output transformers
  114. Anyone Have a Schematic for Wavac MD300B?
  115. PushPull vs ParalelSE
  116. Painting transformer end bells
  117. all-octal schaded pp
  118. New Wood Chassis from Hammond
  119. Strange Noise From Amp
  120. Missing components
  121. Tube headphone amplifier.
  122. Emission - Double Triode
  123. Convergent Audio Technology - where is their Hompage?
  124. Mesh Plate
  125. Cathode follower question
  126. Power supply question
  127. Looking for a 866a powersupply schematic
  128. 211 or 845 project
  129. Modify Dynaco MKIII to use 6AR6s ?
  130. Yet another Dyna ST-70 Input Board
  131. Free Download Vacuum Tube Design Book
  132. driver stage for ppp 6550's
  133. power supply problem
  134. Positive/Negative Feedback
  135. Unholy Alliance Phono Amp
  136. Shrink a tube amp
  137. lampizator srpp help
  138. the secret of best preamplifier
  139. Any issues with adding a grounded power cord to a Heathkit IT-17 tube tester?
  140. HELP to ID push pull/Single Ende
  141. 12BH7,6414,and 12AT7 to drive EL34 better
  142. Testing Tube Amplifiers
  143. trade off higher HT current for lower filament current ?
  144. Any Russian analog of 12BY7 ?
  145. SV572-10 still being made?
  146. PP Output Transformer Testing Puzzle
  147. baby steps
  148. Partial FB: 2 SE + 1 PI = PP?
  149. G-807=807 SE or PP?
  150. 1Hz oscillation with CCS biased output valves
  151. Ultra-linear 6L6 output stage
  152. Transformer or capacitor coupling?
  153. Victor (JVC) Tube Amp MCM-200
  154. MiniWatt N3 problems, oscillation thumping and RF/motor problems.
  155. A2293 pins connection, help !!!
  156. Start-Up Delay for tube amp !
  157. Getting OPT in Japan?
  158. cathode follower tube buffer using 6n6p
  159. Buzz at output until tubes conduct
  160. I need help for amps.
  161. UL Connection results in higher distortion
  162. Header bypass Cap?
  163. DC heater large cap
  164. How to lower preamp output?
  165. Why use a pre amplifier
  166. DHT-buffered NOS-dac
  167. Microphonics 12AY7 v.s. 12AX7
  168. ECC99/2A3 interstage finished, but have one query
  169. Tube lovers in Germany?
  170. preamplifier
  171. Choosing grid leak resistor value -- partly subjective?
  172. What does the acronym "AMW" stand for?
  173. 6C33C distortion spectrum
  174. 6C33C OTL DC schematic needed
  175. help with identifying the cause of preamp problem
  176. Rosenblit 70w Mac amp
  177. Grounding scheme
  178. CC vs Shunt filament supply?
  179. Need opinions on boxing a dual mono line stage
  180. Lets settle the b+ on cold tubes issue!
  181. New 2A3 SET / Simple, but gentle sounding amplifier
  182. Magnavox Console Amp Chassis
  183. transformer identification
  184. 50Wrms audio amplifier
  185. 12B4 have a good sound ???
  186. almarro OPT question
  187. Best EL84pp kit??
  188. Clarion 6L6G Oscillator Amp.
  189. Did you hear an original tube sound?
  190. Designing an OTL / Circlotron
  191. Cayin A55t or AudioSpace AS-8i Mk.III
  192. filament voltage question
  193. 7236 vs 6AS7 ?
  194. Bias Circuit Calculation
  195. 6V6 Hum Issues
  196. Crossover co-axial
  197. Wurlitzer 6420 to audio amplifiers
  198. Advice on Parafeed Output Transformer
  199. mingda mc34ab mods?
  200. small and cheap OTL schematic needed
  201. ecl82 or ecl86 amplifier decision
  202. Well Here Goes... K16LS in Dynaco Chassis?
  203. Not too often you see one of those
  204. Sweet Peach vs Meng Yue EL84
  205. Attempt at giving back: 6L6GC SE amplifier
  206. Best Complete KT88 Amp Kit under $1K?
  207. Webcor Musicale OT puzzle
  208. Audio Research SP3a
  209. Preamp Conordīs with some malfunctioning
  210. Oscillating PSU above certain voltage
  211. B+ voltage load line question
  212. ming da tube amp smell
  213. Rebuilding my amp, would like some input.
  214. do any of these cv4024s seem genuine to you?
  215. Stupid question: EL34 tubes.
  216. PP with Unbalanced concertina = 2nd H?
  217. harmonic distortion
  218. Enhanced Tube's performance
  219. New GU50 SE: SRRP or Cascode for driver?
  220. Hivac XN11 tubes
  221. Conrad Johnson PV-10a hum. Any advice?
  222. Bob Carver's eye candy on eBay
  223. MFA Lumi started "motor-boating" today
  224. New GM70 tube with problem
  225. Interested in building together a 300B tube amp?
  226. cayin a-55t want to use el34
  227. Mc240
  228. Dht ?
  229. too much output impedance?
  230. College-proofing an ST-70 (aka autobias+ST-70)
  231. reverse polarity of the chinese goods?
  232. 6bg6 and 8k opt power amp project
  233. Need some calculation assist for a psu
  234. Baldwin Transformer Swap
  235. THD, s/n and IM noisy measurements
  236. Little dot 2+, got spark
  237. (INDIA) urgent - high-quality amp builders/techs in Delhi?
  238. What causes saturation in tubes?
  239. Plug and Play Power Supply
  240. GE 5814 and 12AUCIFTE
  241. Amplifier oscillates - advice sought
  242. 50s Amplifier
  243. power supply design question 832A amp
  244. Klimo power supply advice
  245. Earth Not Connected
  246. DC heater supply for phono pre
  247. Audio Note P2SE problem
  248. Aikido Transformers - Good Choice?
  249. Caps before or after MOSFET V-regulator
  250. Which capacitors should I replace?

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