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  1. what's a good layout for a quad EL84 amp on this box?
  2. Scott 350B Tuner; Bridge Rectifier
  3. intermitent static pops from speakers st70
  4. baxandall type tone control for diff amp
  5. Stage amps using DHTs
  6. Tube+OP My headphono & preamp
  7. NFB Clarification
  8. James output transformers
  9. I just bought a an old valve amp
  10. Bias Curves
  11. Triode in Class B or Beam Pentode in Class AB2
  12. Elna Cerafine Caps
  13. help with calibrating a Tv7d/U military tube tester
  14. Cathode Follower driven Phase Inverters
  15. Help finding a tube tester for Stereo tube amps.
  16. Anything horribly wrong with this (LTP w/ LM317 as CCS)
  17. Zenith OPT question
  18. OT/Speaker impedance mismatch
  19. Goldilocks & the 3 (or more) preamp power supplies
  20. Using SE OT for PP.
  21. Need preamplifier schematic/suggestions
  22. Push-Pull vs Push-Pull-Parallel
  23. Odd/Crazy output transformer design?
  24. what 2A3 desgin recommented for home theater
  25. power supply for 10m45s
  26. How badly matched are your IXYS10M45S ?
  27. Class B Push-Pull
  28. Please comment on my design -and a few resistor values..
  29. How to lower even harmonic, keep odd one
  30. PC Mount 9-Pin Tube Socket Layout
  31. datasheet for type 52, help !!!
  32. Another kt88 Monoblock Builders Thread
  33. Question about stacked pawer supplies
  34. ys audio preamp
  35. Need help on 811A partial feedback
  36. Funny console, need ideas...
  37. SMPS experts come on in please!
  38. DC Filament supply boards
  39. Looking for vintage radio sound
  40. Channel death - Chinese EL34 PP
  41. JFET cascoded with tube gain calculation
  42. Fet 6Gk5 ECC88 mc phono stage
  43. Heathkit ol-1 oscilloscope help. Can't get solid spot during setup procedure.
  44. Operating a stereo amp in bridged mode
  45. Mic input Transformer from Triode Elect
  46. Power transformer for tube amp requirements
  47. Tape playback amp
  48. Tube for high input Z
  49. Eico 666 tube tester restoration - need grid control!
  50. Need Schematic/Manual Lambda 71
  51. Replace ECC83 preamp valve with E88CC(6922)
  52. Advice on 6P3S p-p amp schematic, feedback problem?
  53. 6S41S P-P Amp Initial Query
  54. El Cheapo, builders thread
  55. kbu608 rectifier
  56. Looking for nice sounding amp project
  57. B+ for EL84
  58. Output Transformer kt88 6550 pp, Wires? Jukebox? Help.
  59. OPT with foil secondaries
  60. Small Tube Pre Amp - Power Supply Cable
  61. Identification of unknown output transformer
  62. master volume with a extra tube
  63. 10 pounds of power for $15
  64. Unstable Eico HF-87
  65. DIY Dual Channel Active Tube Tone Control
  66. cant eliminate 50hz hum on just one side of the 6h6p headphoneamp
  67. question about the 866a
  68. Trade Custom Speaker Horns for Custom Amp
  69. TVA-1 valve amp - help
  70. Need to source a PSU chassis - simple steel
  71. What should I do with my Dynaco MKIII's
  72. inrush current
  73. Scott 222B output transformer : Compatibility and specs
  74. C3G/C3M Prices
  75. 5v3, 5u4, 5u4gb, 5u4gbm, 5931?
  76. transformer for quad EL84 SE amp - will Antek 360v work
  77. Best Possible Tube Headphone Amp
  78. Help with cheap mono SE
  79. Millkido 24
  80. 60W mono's design help
  81. Psu question - best place for the caps?
  82. 1.2W guitar amp useing:6N2P and 6N1P russian tubes.
  83. RCA jacks
  84. Hickok 530-B tester charts wanted
  85. comparison of heater termination noise
  86. Some questions about an amplifier design
  87. 2nd harmonic feedback
  88. idea's for a valve preamp
  89. Best line stage tube?
  90. Bias Adjustment point
  91. Looking for a Williamson squematics
  92. Magnavox Console Speaker Impedances
  93. first tube amp
  94. Beam Triodes
  95. Winding output transformers
  96. Anyone Have a Schematic for Wavac MD300B?
  97. PushPull vs ParalelSE
  98. Painting transformer end bells
  99. all-octal schaded pp
  100. New Wood Chassis from Hammond
  101. Strange Noise From Amp
  102. Missing components
  103. Tube headphone amplifier.
  104. Emission - Double Triode
  105. Convergent Audio Technology - where is their Hompage?
  106. Mesh Plate
  107. Cathode follower question
  108. Power supply question
  109. Looking for a 866a powersupply schematic
  110. 211 or 845 project
  111. Modify Dynaco MKIII to use 6AR6s ?
  112. Yet another Dyna ST-70 Input Board
  113. Free Download Vacuum Tube Design Book
  114. driver stage for ppp 6550's
  115. power supply problem
  116. Positive/Negative Feedback
  117. Unholy Alliance Phono Amp
  118. Shrink a tube amp
  119. lampizator srpp help
  120. the secret of best preamplifier
  121. Any issues with adding a grounded power cord to a Heathkit IT-17 tube tester?
  122. HELP to ID push pull/Single Ende
  123. 12BH7,6414,and 12AT7 to drive EL34 better
  124. Testing Tube Amplifiers
  125. trade off higher HT current for lower filament current ?
  126. Any Russian analog of 12BY7 ?
  127. SV572-10 still being made?
  128. PP Output Transformer Testing Puzzle
  129. baby steps
  130. Partial FB: 2 SE + 1 PI = PP?
  131. G-807=807 SE or PP?
  132. 1Hz oscillation with CCS biased output valves
  133. Ultra-linear 6L6 output stage
  134. Transformer or capacitor coupling?
  135. Victor (JVC) Tube Amp MCM-200
  136. MiniWatt N3 problems, oscillation thumping and RF/motor problems.
  137. A2293 pins connection, help !!!
  138. Start-Up Delay for tube amp !
  139. Getting OPT in Japan?
  140. cathode follower tube buffer using 6n6p
  141. Buzz at output until tubes conduct
  142. I need help for amps.
  143. UL Connection results in higher distortion
  144. Header bypass Cap?
  145. DC heater large cap
  146. How to lower preamp output?
  147. Why use a pre amplifier
  148. DHT-buffered NOS-dac
  149. Microphonics 12AY7 v.s. 12AX7
  150. ECC99/2A3 interstage finished, but have one query
  151. Tube lovers in Germany?
  152. preamplifier
  153. Choosing grid leak resistor value -- partly subjective?
  154. What does the acronym "AMW" stand for?
  155. 6C33C distortion spectrum
  156. 6C33C OTL DC schematic needed
  157. help with identifying the cause of preamp problem
  158. Rosenblit 70w Mac amp
  159. Grounding scheme
  160. CC vs Shunt filament supply?
  161. Need opinions on boxing a dual mono line stage
  162. Lets settle the b+ on cold tubes issue!
  163. New 2A3 SET / Simple, but gentle sounding amplifier
  164. Magnavox Console Amp Chassis
  165. transformer identification
  166. 50Wrms audio amplifier
  167. 12B4 have a good sound ???
  168. almarro OPT question
  169. Best EL84pp kit??
  170. Clarion 6L6G Oscillator Amp.
  171. Did you hear an original tube sound?
  172. Designing an OTL / Circlotron
  173. Cayin A55t or AudioSpace AS-8i Mk.III
  174. filament voltage question
  175. 7236 vs 6AS7 ?
  176. Bias Circuit Calculation
  177. 6V6 Hum Issues
  178. Crossover co-axial
  179. Wurlitzer 6420 to audio amplifiers
  180. Advice on Parafeed Output Transformer
  181. mingda mc34ab mods?
  182. small and cheap OTL schematic needed
  183. ecl82 or ecl86 amplifier decision
  184. Well Here Goes... K16LS in Dynaco Chassis?
  185. Not too often you see one of those
  186. Sweet Peach vs Meng Yue EL84
  187. Attempt at giving back: 6L6GC SE amplifier
  188. Best Complete KT88 Amp Kit under $1K?
  189. Webcor Musicale OT puzzle
  190. Audio Research SP3a
  191. Preamp Conordīs with some malfunctioning
  192. Oscillating PSU above certain voltage
  193. B+ voltage load line question
  194. ming da tube amp smell
  195. Rebuilding my amp, would like some input.
  196. do any of these cv4024s seem genuine to you?
  197. Stupid question: EL34 tubes.
  198. PP with Unbalanced concertina = 2nd H?
  199. harmonic distortion
  200. Enhanced Tube's performance
  201. New GU50 SE: SRRP or Cascode for driver?
  202. Hivac XN11 tubes
  203. Conrad Johnson PV-10a hum. Any advice?
  204. Bob Carver's eye candy on eBay
  205. MFA Lumi started "motor-boating" today
  206. New GM70 tube with problem
  207. Interested in building together a 300B tube amp?
  208. cayin a-55t want to use el34
  209. Mc240
  210. Dht ?
  211. too much output impedance?
  212. College-proofing an ST-70 (aka autobias+ST-70)
  213. reverse polarity of the chinese goods?
  214. 6bg6 and 8k opt power amp project
  215. Need some calculation assist for a psu
  216. Baldwin Transformer Swap
  217. THD, s/n and IM noisy measurements
  218. Little dot 2+, got spark
  219. (INDIA) urgent - high-quality amp builders/techs in Delhi?
  220. What causes saturation in tubes?
  221. Plug and Play Power Supply
  222. GE 5814 and 12AUCIFTE
  223. Amplifier oscillates - advice sought
  224. 50s Amplifier
  225. power supply design question 832A amp
  226. Klimo power supply advice
  227. Earth Not Connected
  228. DC heater supply for phono pre
  229. Audio Note P2SE problem
  230. Aikido Transformers - Good Choice?
  231. Caps before or after MOSFET V-regulator
  232. Which capacitors should I replace?
  233. Testing Amplifiers
  234. Choosing choke valuein pre amp tube
  235. Supertriode with PNP transistors
  236. too much gain
  237. Lloyd's Vintage High Fidelity Audio Devices - both Tube and Solid State
  238. Cheap eBay "zoe_tsan" tube kits - worth anything?
  239. Bell Vintage High Fidelity Audio Devices - both Tube and Solid State
  240. Small Tube Amp with Hum
  241. tube rectifier question
  242. Unison Research S6 schematics
  243. vacuum tube amplifiers should be produced like this?
  244. 6d22s to 6cj3
  245. pot in tube preamp
  246. Mable Audio vs. Suppo audio sound quality
  247. swdfasdfsdf
  248. measuring heater voltage
  249. Need a circuit around these tubes.
  250. Single-Ended 13E1 amplifier

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