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  1. Help finding a tube tester for Stereo tube amps.
  2. Anything horribly wrong with this (LTP w/ LM317 as CCS)
  3. Zenith OPT question
  4. OT/Speaker impedance mismatch
  5. Goldilocks & the 3 (or more) preamp power supplies
  6. Using SE OT for PP.
  7. Need preamplifier schematic/suggestions
  8. Push-Pull vs Push-Pull-Parallel
  9. Odd/Crazy output transformer design?
  10. what 2A3 desgin recommented for home theater
  11. power supply for 10m45s
  12. How badly matched are your IXYS10M45S ?
  13. Class B Push-Pull
  14. Please comment on my design -and a few resistor values..
  15. How to lower even harmonic, keep odd one
  16. PC Mount 9-Pin Tube Socket Layout
  17. datasheet for type 52, help !!!
  18. Another kt88 Monoblock Builders Thread
  19. Question about stacked pawer supplies
  20. ys audio preamp
  21. Need help on 811A partial feedback
  22. Funny console, need ideas...
  23. SMPS experts come on in please!
  24. DC Filament supply boards
  25. Looking for vintage radio sound
  26. Channel death - Chinese EL34 PP
  27. JFET cascoded with tube gain calculation
  28. Fet 6Gk5 ECC88 mc phono stage
  29. Heathkit ol-1 oscilloscope help. Can't get solid spot during setup procedure.
  30. Operating a stereo amp in bridged mode
  31. Mic input Transformer from Triode Elect
  32. Power transformer for tube amp requirements
  33. Tape playback amp
  34. Tube for high input Z
  35. Eico 666 tube tester restoration - need grid control!
  36. Need Schematic/Manual Lambda 71
  37. Replace ECC83 preamp valve with E88CC(6922)
  38. Advice on 6P3S p-p amp schematic, feedback problem?
  39. 6S41S P-P Amp Initial Query
  40. El Cheapo, builders thread
  41. kbu608 rectifier
  42. Looking for nice sounding amp project
  43. B+ for EL84
  44. Output Transformer kt88 6550 pp, Wires? Jukebox? Help.
  45. OPT with foil secondaries
  46. Small Tube Pre Amp - Power Supply Cable
  47. Identification of unknown output transformer
  48. master volume with a extra tube
  49. 10 pounds of power for $15
  50. Unstable Eico HF-87
  51. DIY Dual Channel Active Tube Tone Control
  52. cant eliminate 50hz hum on just one side of the 6h6p headphoneamp
  53. question about the 866a
  54. Trade Custom Speaker Horns for Custom Amp
  55. TVA-1 valve amp - help
  56. Need to source a PSU chassis - simple steel
  57. What should I do with my Dynaco MKIII's
  58. inrush current
  59. Scott 222B output transformer : Compatibility and specs
  60. C3G/C3M Prices
  61. 5v3, 5u4, 5u4gb, 5u4gbm, 5931?
  62. transformer for quad EL84 SE amp - will Antek 360v work
  63. Best Possible Tube Headphone Amp
  64. Help with cheap mono SE
  65. Millkido 24
  66. 60W mono's design help
  67. Psu question - best place for the caps?
  68. 1.2W guitar amp useing:6N2P and 6N1P russian tubes.
  69. RCA jacks
  70. Hickok 530-B tester charts wanted
  71. comparison of heater termination noise
  72. Some questions about an amplifier design
  73. 2nd harmonic feedback
  74. idea's for a valve preamp
  75. Best line stage tube?
  76. Bias Adjustment point
  77. Looking for a Williamson squematics
  78. Magnavox Console Speaker Impedances
  79. first tube amp
  80. Beam Triodes
  81. Winding output transformers
  82. Anyone Have a Schematic for Wavac MD300B?
  83. PushPull vs ParalelSE
  84. Painting transformer end bells
  85. all-octal schaded pp
  86. New Wood Chassis from Hammond
  87. Strange Noise From Amp
  88. Missing components
  89. Tube headphone amplifier.
  90. Emission - Double Triode
  91. Convergent Audio Technology - where is their Hompage?
  92. Mesh Plate
  93. Cathode follower question
  94. Power supply question
  95. Looking for a 866a powersupply schematic
  96. 211 or 845 project
  97. Modify Dynaco MKIII to use 6AR6s ?
  98. Yet another Dyna ST-70 Input Board
  99. Free Download Vacuum Tube Design Book
  100. driver stage for ppp 6550's
  101. power supply problem
  102. Positive/Negative Feedback
  103. Unholy Alliance Phono Amp
  104. Shrink a tube amp
  105. lampizator srpp help
  106. the secret of best preamplifier
  107. Any issues with adding a grounded power cord to a Heathkit IT-17 tube tester?
  108. HELP to ID push pull/Single Ende
  109. 12BH7,6414,and 12AT7 to drive EL34 better
  110. Testing Tube Amplifiers
  111. trade off higher HT current for lower filament current ?
  112. Any Russian analog of 12BY7 ?
  113. SV572-10 still being made?
  114. PP Output Transformer Testing Puzzle
  115. baby steps
  116. Partial FB: 2 SE + 1 PI = PP?
  117. G-807=807 SE or PP?
  118. 1Hz oscillation with CCS biased output valves
  119. Ultra-linear 6L6 output stage
  120. Transformer or capacitor coupling?
  121. Victor (JVC) Tube Amp MCM-200
  122. MiniWatt N3 problems, oscillation thumping and RF/motor problems.
  123. A2293 pins connection, help !!!
  124. Start-Up Delay for tube amp !
  125. Getting OPT in Japan?
  126. cathode follower tube buffer using 6n6p
  127. Buzz at output until tubes conduct
  128. I need help for amps.
  129. UL Connection results in higher distortion
  130. Header bypass Cap?
  131. DC heater large cap
  132. How to lower preamp output?
  133. Why use a pre amplifier
  134. DHT-buffered NOS-dac
  135. Microphonics 12AY7 v.s. 12AX7
  136. ECC99/2A3 interstage finished, but have one query
  137. Tube lovers in Germany?
  138. preamplifier
  139. Choosing grid leak resistor value -- partly subjective?
  140. What does the acronym "AMW" stand for?
  141. 6C33C distortion spectrum
  142. 6C33C OTL DC schematic needed
  143. help with identifying the cause of preamp problem
  144. Rosenblit 70w Mac amp
  145. Grounding scheme
  146. CC vs Shunt filament supply?
  147. Need opinions on boxing a dual mono line stage
  148. Lets settle the b+ on cold tubes issue!
  149. New 2A3 SET / Simple, but gentle sounding amplifier
  150. Magnavox Console Amp Chassis
  151. transformer identification
  152. 50Wrms audio amplifier
  153. 12B4 have a good sound ???
  154. almarro OPT question
  155. Best EL84pp kit??
  156. Clarion 6L6G Oscillator Amp.
  157. Did you hear an original tube sound?
  158. Designing an OTL / Circlotron
  159. Cayin A55t or AudioSpace AS-8i Mk.III
  160. filament voltage question
  161. 7236 vs 6AS7 ?
  162. Bias Circuit Calculation
  163. 6V6 Hum Issues
  164. Crossover co-axial
  165. Wurlitzer 6420 to audio amplifiers
  166. Advice on Parafeed Output Transformer
  167. mingda mc34ab mods?
  168. small and cheap OTL schematic needed
  169. ecl82 or ecl86 amplifier decision
  170. Well Here Goes... K16LS in Dynaco Chassis?
  171. Not too often you see one of those
  172. Sweet Peach vs Meng Yue EL84
  173. Attempt at giving back: 6L6GC SE amplifier
  174. Best Complete KT88 Amp Kit under $1K?
  175. Webcor Musicale OT puzzle
  176. Audio Research SP3a
  177. Preamp Conordīs with some malfunctioning
  178. Oscillating PSU above certain voltage
  179. B+ voltage load line question
  180. ming da tube amp smell
  181. Rebuilding my amp, would like some input.
  182. do any of these cv4024s seem genuine to you?
  183. Stupid question: EL34 tubes.
  184. PP with Unbalanced concertina = 2nd H?
  185. harmonic distortion
  186. Enhanced Tube's performance
  187. New GU50 SE: SRRP or Cascode for driver?
  188. Hivac XN11 tubes
  189. Conrad Johnson PV-10a hum. Any advice?
  190. Bob Carver's eye candy on eBay
  191. MFA Lumi started "motor-boating" today
  192. New GM70 tube with problem
  193. Interested in building together a 300B tube amp?
  194. cayin a-55t want to use el34
  195. Mc240
  196. Dht ?
  197. too much output impedance?
  198. College-proofing an ST-70 (aka autobias+ST-70)
  199. reverse polarity of the chinese goods?
  200. 6bg6 and 8k opt power amp project
  201. Need some calculation assist for a psu
  202. Baldwin Transformer Swap
  203. THD, s/n and IM noisy measurements
  204. Little dot 2+, got spark
  205. (INDIA) urgent - high-quality amp builders/techs in Delhi?
  206. What causes saturation in tubes?
  207. Plug and Play Power Supply
  208. GE 5814 and 12AUCIFTE
  209. Amplifier oscillates - advice sought
  210. 50s Amplifier
  211. power supply design question 832A amp
  212. Klimo power supply advice
  213. Earth Not Connected
  214. DC heater supply for phono pre
  215. Audio Note P2SE problem
  216. Aikido Transformers - Good Choice?
  217. Caps before or after MOSFET V-regulator
  218. Which capacitors should I replace?
  219. Testing Amplifiers
  220. Choosing choke valuein pre amp tube
  221. Supertriode with PNP transistors
  222. too much gain
  223. Lloyd's Vintage High Fidelity Audio Devices - both Tube and Solid State
  224. Cheap eBay "zoe_tsan" tube kits - worth anything?
  225. Bell Vintage High Fidelity Audio Devices - both Tube and Solid State
  226. Small Tube Amp with Hum
  227. tube rectifier question
  228. Unison Research S6 schematics
  229. vacuum tube amplifiers should be produced like this?
  230. 6d22s to 6cj3
  231. pot in tube preamp
  232. Mable Audio vs. Suppo audio sound quality
  233. swdfasdfsdf
  234. measuring heater voltage
  235. Need a circuit around these tubes.
  236. Single-Ended 13E1 amplifier
  237. Whats' the max allowable / reasonable ripple in SE amp?
  238. What amp kits are out there?
  239. ECC84/6N14P for audio
  240. PSU ignorant
  241. How to define a quality OT?
  242. Looking for some build advice
  243. ASC oil caps vs M-tube cap for ps
  244. SS CCS and distortion
  245. the valve with no markings
  246. Pentode AB1 design school???
  247. Capability of Sony/Tamradio SE Output Transformers
  248. my CELLINI triode amp
  249. 45-based SET -> Pass Labs F4
  250. Testing Amplifiers - Speaker or dummy load

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