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  1. Suppo el34
  2. my new tube experience
  3. LL1682PP Lundahl
  4. BP Ultrapath
  5. Tube shops/sellers in Kiev , Ukraine ?
  6. Headphones with tubes...
  7. A Triad xfmr for a voltage doubler PSU
  8. Ra-100
  9. Series Resistors on Outputs of Transformer?
  10. what's up !? new choke=subsonic pumping
  11. How to get the best out of the 6C33C-B?
  12. TO-220 PCB spacing for HV MOSFETs
  13. Need input on Buffer stage to use in Preamp..
  14. quad output tube help
  15. "Stacking" power transformer secondaries?
  16. Tubes flare on start up!!
  17. Grid Stopper Advice - Graphs Included!
  18. Wanted! single-ended 807 schematic
  19. sputtering 5u4 on diy Wheatfield amp
  20. Is this output transformer faulty?
  21. Help identify variac
  22. what's a good layout for a quad EL84 amp on this box?
  23. Scott 350B Tuner; Bridge Rectifier
  24. intermitent static pops from speakers st70
  25. baxandall type tone control for diff amp
  26. Stage amps using DHTs
  27. Tube+OP My headphono & preamp
  28. NFB Clarification
  29. James output transformers
  30. I just bought a an old valve amp
  31. Bias Curves
  32. Triode in Class B or Beam Pentode in Class AB2
  33. Cathode Follower driven Phase Inverters
  34. Help finding a tube tester for Stereo tube amps.
  35. Anything horribly wrong with this (LTP w/ LM317 as CCS)
  36. Zenith OPT question
  37. OT/Speaker impedance mismatch
  38. Goldilocks & the 3 (or more) preamp power supplies
  39. Using SE OT for PP.
  40. Need preamplifier schematic/suggestions
  41. Push-Pull vs Push-Pull-Parallel
  42. Odd/Crazy output transformer design?
  43. what 2A3 desgin recommented for home theater
  44. power supply for 10m45s
  45. How badly matched are your IXYS10M45S ?
  46. Class B Push-Pull
  47. Please comment on my design -and a few resistor values..
  48. How to lower even harmonic, keep odd one
  49. PC Mount 9-Pin Tube Socket Layout
  50. datasheet for type 52, help !!!
  51. Another kt88 Monoblock Builders Thread
  52. Question about stacked pawer supplies
  53. ys audio preamp
  54. Need help on 811A partial feedback
  55. Funny console, need ideas...
  56. SMPS experts come on in please!
  57. DC Filament supply boards
  58. Looking for vintage radio sound
  59. Channel death - Chinese EL34 PP
  60. JFET cascoded with tube gain calculation
  61. Fet 6Gk5 ECC88 mc phono stage
  62. Operating a stereo amp in bridged mode
  63. Mic input Transformer from Triode Elect
  64. Power transformer for tube amp requirements
  65. Tape playback amp
  66. Replace ECC83 preamp valve with E88CC(6922)
  67. Advice on 6P3S p-p amp schematic, feedback problem?
  68. 6S41S P-P Amp Initial Query
  69. El Cheapo, builders thread
  70. kbu608 rectifier
  71. Looking for nice sounding amp project
  72. B+ for EL84
  73. Output Transformer kt88 6550 pp, Wires? Jukebox? Help.
  74. OPT with foil secondaries
  75. Small Tube Pre Amp - Power Supply Cable
  76. Identification of unknown output transformer
  77. master volume with a extra tube
  78. 10 pounds of power for $15
  79. Unstable Eico HF-87
  80. DIY Dual Channel Active Tube Tone Control
  81. cant eliminate 50hz hum on just one side of the 6h6p headphoneamp
  82. question about the 866a
  83. Trade Custom Speaker Horns for Custom Amp
  84. TVA-1 valve amp - help
  85. Need to source a PSU chassis - simple steel
  86. What should I do with my Dynaco MKIII's
  87. inrush current
  88. Scott 222B output transformer : Compatibility and specs
  89. C3G/C3M Prices
  90. 5v3, 5u4, 5u4gb, 5u4gbm, 5931?
  91. transformer for quad EL84 SE amp - will Antek 360v work
  92. Best Possible Tube Headphone Amp
  93. Help with cheap mono SE
  94. Millkido 24
  95. 60W mono's design help
  96. Psu question - best place for the caps?
  97. RCA jacks
  98. comparison of heater termination noise
  99. Some questions about an amplifier design
  100. 2nd harmonic feedback
  101. idea's for a valve preamp
  102. Best line stage tube?
  103. Bias Adjustment point
  104. Looking for Williamson schematic
  105. Magnavox Console Speaker Impedances
  106. first tube amp
  107. Beam Triodes
  108. Winding output transformers
  109. Anyone Have a Schematic for Wavac MD300B?
  110. PushPull vs ParalelSE
  111. Painting transformer end bells
  112. all-octal schaded pp
  113. Strange Noise From Amp
  114. Missing components
  115. Tube headphone amplifier.
  116. Emission - Double Triode
  117. Convergent Audio Technology - where is their Hompage?
  118. Mesh Plate
  119. Cathode follower question
  120. Power supply question
  121. Looking for a 866a powersupply schematic
  122. 211 or 845 project
  123. Modify Dynaco MKIII to use 6AR6s ?
  124. Yet another Dyna ST-70 Input Board
  125. Free Download Vacuum Tube Design Book
  126. driver stage for ppp 6550's
  127. power supply problem
  128. Positive/Negative Feedback
  129. Unholy Alliance Phono Amp
  130. Shrink a tube amp
  131. lampizator srpp help
  132. the secret of best preamplifier
  133. HELP to ID push pull/Single Ende
  134. 12BH7,6414,and 12AT7 to drive EL34 better
  135. Testing Tube Amplifiers
  136. trade off higher HT current for lower filament current ?
  137. Any Russian analog of 12BY7 ?
  138. SV572-10 still being made?
  139. PP Output Transformer Testing Puzzle
  140. baby steps
  141. Partial FB: 2 SE + 1 PI = PP?
  142. G-807=807 SE or PP?
  143. 1Hz oscillation with CCS biased output valves
  144. Ultra-linear 6L6 output stage
  145. Transformer or capacitor coupling?
  146. Victor (JVC) Tube Amp MCM-200
  147. MiniWatt N3 problems, oscillation thumping and RF/motor problems.
  148. A2293 pins connection, help !!!
  149. Start-Up Delay for tube amp !
  150. Getting OPT in Japan?
  151. cathode follower tube buffer using 6n6p
  152. Buzz at output until tubes conduct
  153. I need help for amps.
  154. UL Connection results in higher distortion
  155. Header bypass Cap?
  156. DC heater large cap
  157. How to lower preamp output?
  158. Why use a pre amplifier
  159. DHT-buffered NOS-dac
  160. Microphonics 12AY7 v.s. 12AX7
  161. ECC99/2A3 interstage finished, but have one query
  162. Tube lovers in Germany?
  163. preamplifier
  164. Choosing grid leak resistor value -- partly subjective?
  165. What does the acronym "AMW" stand for?
  166. 6C33C distortion spectrum
  167. 6C33C OTL DC schematic needed
  168. help with identifying the cause of preamp problem
  169. Rosenblit 70w Mac amp
  170. Grounding scheme
  171. CC vs Shunt filament supply?
  172. Need opinions on boxing a dual mono line stage
  173. Lets settle the b+ on cold tubes issue!
  174. New 2A3 SET / Simple, but gentle sounding amplifier
  175. Magnavox Console Amp Chassis
  176. transformer identification
  177. 50Wrms audio amplifier
  178. 12B4 have a good sound ???
  179. almarro OPT question
  180. Best EL84pp kit??
  181. Clarion 6L6G Oscillator Amp.
  182. Did you hear an original tube sound?
  183. Designing an OTL / Circlotron
  184. Cayin A55t or AudioSpace AS-8i Mk.III
  185. filament voltage question
  186. 7236 vs 6AS7 ?
  187. Bias Circuit Calculation
  188. 6V6 Hum Issues
  189. Crossover co-axial
  190. Wurlitzer 6420 to audio amplifiers
  191. Advice on Parafeed Output Transformer
  192. mingda mc34ab mods?
  193. small and cheap OTL schematic needed
  194. ecl82 or ecl86 amplifier decision
  195. Well Here Goes... K16LS in Dynaco Chassis?
  196. Not too often you see one of those
  197. Sweet Peach vs Meng Yue EL84
  198. Attempt at giving back: 6L6GC SE amplifier
  199. Best Complete KT88 Amp Kit under $1K?
  200. Webcor Musicale OT puzzle
  201. Audio Research SP3a
  202. Preamp Conordīs with some malfunctioning
  203. Oscillating PSU above certain voltage
  204. B+ voltage load line question
  205. ming da tube amp smell
  206. Rebuilding my amp, would like some input.
  207. do any of these cv4024s seem genuine to you?
  208. Stupid question: EL34 tubes.
  209. PP with Unbalanced concertina = 2nd H?
  210. harmonic distortion
  211. Enhanced Tube's performance
  212. New GU50 SE: SRRP or Cascode for driver?
  213. Hivac XN11 tubes
  214. Conrad Johnson PV-10a hum. Any advice?
  215. Bob Carver's eye candy on eBay
  216. MFA Lumi started "motor-boating" today
  217. New GM70 tube with problem
  218. Interested in building together a 300B tube amp?
  219. cayin a-55t want to use el34
  220. Mc240
  221. Dht ?
  222. too much output impedance?
  223. College-proofing an ST-70 (aka autobias+ST-70)
  224. reverse polarity of the chinese goods?
  225. 6bg6 and 8k opt power amp project
  226. Need some calculation assist for a psu
  227. Baldwin Transformer Swap
  228. THD, s/n and IM noisy measurements
  229. Little dot 2+, got spark
  230. (INDIA) urgent - high-quality amp builders/techs in Delhi?
  231. What causes saturation in tubes?
  232. Plug and Play Power Supply
  233. GE 5814 and 12AUCIFTE
  234. Amplifier oscillates - advice sought
  235. 50s Amplifier
  236. power supply design question 832A amp
  237. Klimo power supply advice
  238. Earth Not Connected
  239. DC heater supply for phono pre
  240. Audio Note P2SE problem
  241. Aikido Transformers - Good Choice?
  242. Caps before or after MOSFET V-regulator
  243. Which capacitors should I replace?
  244. Testing Amplifiers
  245. Choosing choke valuein pre amp tube
  246. Supertriode with PNP transistors
  247. too much gain
  248. Lloyd's Vintage High Fidelity Audio Devices - both Tube and Solid State
  249. Cheap eBay "zoe_tsan" tube kits - worth anything?
  250. Bell Vintage High Fidelity Audio Devices - both Tube and Solid State

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