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  1. Ridiculous Hallucinations
  2. Transformer Ratings
  3. dB Meter with tube circuit
  4. Suggestions for pp or se monos
  5. Low filament current tubes
  6. Tube Clearout
  7. First tube amp, it needs maintenance
  8. Need EF86 phono preamplifier shematic
  9. cannot locate documentation on SCA 9190 receiver
  10. Ecc88 pin 9 connection??
  11. VTL Compact100 Monoblock Blows Fuse
  12. 300b driver revisited.
  13. SYclotron schematic
  14. Hum problem
  15. Suppo el34
  16. my new tube experience
  17. LL1682PP Lundahl
  18. BP Ultrapath
  19. Tube shops/sellers in Kiev , Ukraine ?
  20. Headphones with tubes...
  21. A Triad xfmr for a voltage doubler PSU
  22. Ra-100
  23. Series Resistors on Outputs of Transformer?
  24. what's up !? new choke=subsonic pumping
  25. How to get the best out of the 6C33C-B?
  26. TO-220 PCB spacing for HV MOSFETs
  27. Need input on Buffer stage to use in Preamp..
  28. quad output tube help
  29. "Stacking" power transformer secondaries?
  30. Tubes flare on start up!!
  31. Grid Stopper Advice - Graphs Included!
  32. Western Electric settings for Hickok 600A?
  33. Wanted! single-ended 807 schematic
  34. sputtering 5u4 on diy Wheatfield amp
  35. Is this output transformer faulty?
  36. Help identify variac
  37. Schematic for TL Audio VP-5051 Voice Processor
  38. what's a good layout for a quad EL84 amp on this box?
  39. Scott 350B Tuner; Bridge Rectifier
  40. intermitent static pops from speakers st70
  41. baxandall type tone control for diff amp
  42. Stage amps using DHTs
  43. Tube+OP My headphono & preamp
  44. NFB Clarification
  45. James output transformers
  46. I just bought a an old valve amp
  47. Bias Curves
  48. Triode in Class B or Beam Pentode in Class AB2
  49. help with calibrating a Tv7d/U military tube tester
  50. Cathode Follower driven Phase Inverters
  51. Help finding a tube tester for Stereo tube amps.
  52. Anything horribly wrong with this (LTP w/ LM317 as CCS)
  53. Zenith OPT question
  54. OT/Speaker impedance mismatch
  55. Goldilocks & the 3 (or more) preamp power supplies
  56. Using SE OT for PP.
  57. Need preamplifier schematic/suggestions
  58. Push-Pull vs Push-Pull-Parallel
  59. Odd/Crazy output transformer design?
  60. what 2A3 desgin recommented for home theater
  61. power supply for 10m45s
  62. How badly matched are your IXYS10M45S ?
  63. Class B Push-Pull
  64. Please comment on my design -and a few resistor values..
  65. How to lower even harmonic, keep odd one
  66. PC Mount 9-Pin Tube Socket Layout
  67. datasheet for type 52, help !!!
  68. Another kt88 Monoblock Builders Thread
  69. Question about stacked pawer supplies
  70. ys audio preamp
  71. Need help on 811A partial feedback
  72. Funny console, need ideas...
  73. SMPS experts come on in please!
  74. DC Filament supply boards
  75. Looking for vintage radio sound
  76. Channel death - Chinese EL34 PP
  77. JFET cascoded with tube gain calculation
  78. Fet 6Gk5 ECC88 mc phono stage
  79. Heathkit ol-1 oscilloscope help. Can't get solid spot during setup procedure.
  80. Operating a stereo amp in bridged mode
  81. Mic input Transformer from Triode Elect
  82. Power transformer for tube amp requirements
  83. Tape playback amp
  84. Eico 666 tube tester restoration - need grid control!
  85. Need Schematic/Manual Lambda 71
  86. Replace ECC83 preamp valve with E88CC(6922)
  87. Advice on 6P3S p-p amp schematic, feedback problem?
  88. 6S41S P-P Amp Initial Query
  89. El Cheapo, builders thread
  90. kbu608 rectifier
  91. Looking for nice sounding amp project
  92. B+ for EL84
  93. Output Transformer kt88 6550 pp, Wires? Jukebox? Help.
  94. OPT with foil secondaries
  95. Small Tube Pre Amp - Power Supply Cable
  96. Identification of unknown output transformer
  97. master volume with a extra tube
  98. 10 pounds of power for $15
  99. Unstable Eico HF-87
  100. DIY Dual Channel Active Tube Tone Control
  101. cant eliminate 50hz hum on just one side of the 6h6p headphoneamp
  102. question about the 866a
  103. Trade Custom Speaker Horns for Custom Amp
  104. TVA-1 valve amp - help
  105. Need to source a PSU chassis - simple steel
  106. What should I do with my Dynaco MKIII's
  107. inrush current
  108. Scott 222B output transformer : Compatibility and specs
  109. C3G/C3M Prices
  110. 5v3, 5u4, 5u4gb, 5u4gbm, 5931?
  111. transformer for quad EL84 SE amp - will Antek 360v work
  112. Best Possible Tube Headphone Amp
  113. Help with cheap mono SE
  114. Millkido 24
  115. 60W mono's design help
  116. Psu question - best place for the caps?
  117. RCA jacks
  118. Hickok 530-B tester charts wanted
  119. comparison of heater termination noise
  120. Some questions about an amplifier design
  121. 2nd harmonic feedback
  122. idea's for a valve preamp
  123. Best line stage tube?
  124. Bias Adjustment point
  125. Looking for a Williamson squematics
  126. Magnavox Console Speaker Impedances
  127. first tube amp
  128. Beam Triodes
  129. Winding output transformers
  130. Anyone Have a Schematic for Wavac MD300B?
  131. PushPull vs ParalelSE
  132. Painting transformer end bells
  133. all-octal schaded pp
  134. New Wood Chassis from Hammond
  135. Strange Noise From Amp
  136. Missing components
  137. Tube headphone amplifier.
  138. Emission - Double Triode
  139. Convergent Audio Technology - where is their Hompage?
  140. Mesh Plate
  141. Cathode follower question
  142. Power supply question
  143. Looking for a 866a powersupply schematic
  144. 211 or 845 project
  145. Modify Dynaco MKIII to use 6AR6s ?
  146. Yet another Dyna ST-70 Input Board
  147. Free Download Vacuum Tube Design Book
  148. driver stage for ppp 6550's
  149. power supply problem
  150. Positive/Negative Feedback
  151. Unholy Alliance Phono Amp
  152. Shrink a tube amp
  153. lampizator srpp help
  154. the secret of best preamplifier
  155. Any issues with adding a grounded power cord to a Heathkit IT-17 tube tester?
  156. HELP to ID push pull/Single Ende
  157. 12BH7,6414,and 12AT7 to drive EL34 better
  158. Testing Tube Amplifiers
  159. trade off higher HT current for lower filament current ?
  160. Any Russian analog of 12BY7 ?
  161. SV572-10 still being made?
  162. PP Output Transformer Testing Puzzle
  163. baby steps
  164. Partial FB: 2 SE + 1 PI = PP?
  165. G-807=807 SE or PP?
  166. 1Hz oscillation with CCS biased output valves
  167. Ultra-linear 6L6 output stage
  168. Transformer or capacitor coupling?
  169. Victor (JVC) Tube Amp MCM-200
  170. MiniWatt N3 problems, oscillation thumping and RF/motor problems.
  171. A2293 pins connection, help !!!
  172. Start-Up Delay for tube amp !
  173. Getting OPT in Japan?
  174. cathode follower tube buffer using 6n6p
  175. Buzz at output until tubes conduct
  176. I need help for amps.
  177. UL Connection results in higher distortion
  178. Header bypass Cap?
  179. DC heater large cap
  180. How to lower preamp output?
  181. Why use a pre amplifier
  182. DHT-buffered NOS-dac
  183. Microphonics 12AY7 v.s. 12AX7
  184. ECC99/2A3 interstage finished, but have one query
  185. Tube lovers in Germany?
  186. preamplifier
  187. Choosing grid leak resistor value -- partly subjective?
  188. What does the acronym "AMW" stand for?
  189. 6C33C distortion spectrum
  190. 6C33C OTL DC schematic needed
  191. help with identifying the cause of preamp problem
  192. Rosenblit 70w Mac amp
  193. Grounding scheme
  194. CC vs Shunt filament supply?
  195. Need opinions on boxing a dual mono line stage
  196. Lets settle the b+ on cold tubes issue!
  197. New 2A3 SET / Simple, but gentle sounding amplifier
  198. Magnavox Console Amp Chassis
  199. transformer identification
  200. 50Wrms audio amplifier
  201. 12B4 have a good sound ???
  202. almarro OPT question
  203. Best EL84pp kit??
  204. Clarion 6L6G Oscillator Amp.
  205. Did you hear an original tube sound?
  206. Designing an OTL / Circlotron
  207. Cayin A55t or AudioSpace AS-8i Mk.III
  208. filament voltage question
  209. 7236 vs 6AS7 ?
  210. Bias Circuit Calculation
  211. 6V6 Hum Issues
  212. Crossover co-axial
  213. Wurlitzer 6420 to audio amplifiers
  214. Advice on Parafeed Output Transformer
  215. mingda mc34ab mods?
  216. small and cheap OTL schematic needed
  217. ecl82 or ecl86 amplifier decision
  218. Well Here Goes... K16LS in Dynaco Chassis?
  219. Not too often you see one of those
  220. Sweet Peach vs Meng Yue EL84
  221. Attempt at giving back: 6L6GC SE amplifier
  222. Best Complete KT88 Amp Kit under $1K?
  223. Webcor Musicale OT puzzle
  224. Audio Research SP3a
  225. Preamp Conordīs with some malfunctioning
  226. Oscillating PSU above certain voltage
  227. B+ voltage load line question
  228. ming da tube amp smell
  229. Rebuilding my amp, would like some input.
  230. do any of these cv4024s seem genuine to you?
  231. Stupid question: EL34 tubes.
  232. PP with Unbalanced concertina = 2nd H?
  233. harmonic distortion
  234. Enhanced Tube's performance
  235. New GU50 SE: SRRP or Cascode for driver?
  236. Hivac XN11 tubes
  237. Conrad Johnson PV-10a hum. Any advice?
  238. Bob Carver's eye candy on eBay
  239. MFA Lumi started "motor-boating" today
  240. New GM70 tube with problem
  241. Interested in building together a 300B tube amp?
  242. cayin a-55t want to use el34
  243. Mc240
  244. Dht ?
  245. too much output impedance?
  246. College-proofing an ST-70 (aka autobias+ST-70)
  247. reverse polarity of the chinese goods?
  248. 6bg6 and 8k opt power amp project
  249. Need some calculation assist for a psu
  250. Baldwin Transformer Swap

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