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  1. Could this be a perfectly linear triode?
  2. Grounding elevated ccs series filament supply
  3. What to do with E182CC's
  4. Angela EL34 opinions please
  5. Chinise 6N1 tube replacement
  6. Ridiculous Hallucinations
  7. Transformer Ratings
  8. dB Meter with tube circuit
  9. Suggestions for pp or se monos
  10. Low filament current tubes
  11. Tube Clearout
  12. First tube amp, it needs maintenance
  13. Need EF86 phono preamplifier shematic
  14. cannot locate documentation on SCA 9190 receiver
  15. Ecc88 pin 9 connection??
  16. VTL Compact100 Monoblock Blows Fuse
  17. 300b driver revisited.
  18. SYclotron schematic
  19. Hum problem
  20. Suppo el34
  21. my new tube experience
  22. LL1682PP Lundahl
  23. BP Ultrapath
  24. Tube shops/sellers in Kiev , Ukraine ?
  25. Headphones with tubes...
  26. A Triad xfmr for a voltage doubler PSU
  27. Ra-100
  28. Series Resistors on Outputs of Transformer?
  29. what's up !? new choke=subsonic pumping
  30. How to get the best out of the 6C33C-B?
  31. TO-220 PCB spacing for HV MOSFETs
  32. Need input on Buffer stage to use in Preamp..
  33. quad output tube help
  34. "Stacking" power transformer secondaries?
  35. Tubes flare on start up!!
  36. Grid Stopper Advice - Graphs Included!
  37. Western Electric settings for Hickok 600A?
  38. Wanted! single-ended 807 schematic
  39. sputtering 5u4 on diy Wheatfield amp
  40. Is this output transformer faulty?
  41. Help identify variac
  42. Schematic for TL Audio VP-5051 Voice Processor
  43. what's a good layout for a quad EL84 amp on this box?
  44. Scott 350B Tuner; Bridge Rectifier
  45. intermitent static pops from speakers st70
  46. baxandall type tone control for diff amp
  47. Stage amps using DHTs
  48. Tube+OP My headphono & preamp
  49. NFB Clarification
  50. James output transformers
  51. I just bought a an old valve amp
  52. Bias Curves
  53. Triode in Class B or Beam Pentode in Class AB2
  54. help with calibrating a Tv7d/U military tube tester
  55. Cathode Follower driven Phase Inverters
  56. Help finding a tube tester for Stereo tube amps.
  57. Anything horribly wrong with this (LTP w/ LM317 as CCS)
  58. Zenith OPT question
  59. OT/Speaker impedance mismatch
  60. Goldilocks & the 3 (or more) preamp power supplies
  61. Using SE OT for PP.
  62. Need preamplifier schematic/suggestions
  63. Push-Pull vs Push-Pull-Parallel
  64. Odd/Crazy output transformer design?
  65. what 2A3 desgin recommented for home theater
  66. power supply for 10m45s
  67. How badly matched are your IXYS10M45S ?
  68. Class B Push-Pull
  69. Please comment on my design -and a few resistor values..
  70. How to lower even harmonic, keep odd one
  71. PC Mount 9-Pin Tube Socket Layout
  72. datasheet for type 52, help !!!
  73. Another kt88 Monoblock Builders Thread
  74. Question about stacked pawer supplies
  75. ys audio preamp
  76. Need help on 811A partial feedback
  77. Funny console, need ideas...
  78. SMPS experts come on in please!
  79. DC Filament supply boards
  80. Looking for vintage radio sound
  81. Channel death - Chinese EL34 PP
  82. JFET cascoded with tube gain calculation
  83. Fet 6Gk5 ECC88 mc phono stage
  84. Heathkit ol-1 oscilloscope help. Can't get solid spot during setup procedure.
  85. Operating a stereo amp in bridged mode
  86. Mic input Transformer from Triode Elect
  87. Power transformer for tube amp requirements
  88. Tape playback amp
  89. Eico 666 tube tester restoration - need grid control!
  90. Need Schematic/Manual Lambda 71
  91. Replace ECC83 preamp valve with E88CC(6922)
  92. Advice on 6P3S p-p amp schematic, feedback problem?
  93. 6S41S P-P Amp Initial Query
  94. El Cheapo, builders thread
  95. kbu608 rectifier
  96. Looking for nice sounding amp project
  97. B+ for EL84
  98. Output Transformer kt88 6550 pp, Wires? Jukebox? Help.
  99. OPT with foil secondaries
  100. Small Tube Pre Amp - Power Supply Cable
  101. Identification of unknown output transformer
  102. master volume with a extra tube
  103. 10 pounds of power for $15
  104. Unstable Eico HF-87
  105. DIY Dual Channel Active Tube Tone Control
  106. cant eliminate 50hz hum on just one side of the 6h6p headphoneamp
  107. question about the 866a
  108. Trade Custom Speaker Horns for Custom Amp
  109. TVA-1 valve amp - help
  110. Need to source a PSU chassis - simple steel
  111. What should I do with my Dynaco MKIII's
  112. inrush current
  113. Scott 222B output transformer : Compatibility and specs
  114. C3G/C3M Prices
  115. 5v3, 5u4, 5u4gb, 5u4gbm, 5931?
  116. transformer for quad EL84 SE amp - will Antek 360v work
  117. Best Possible Tube Headphone Amp
  118. Help with cheap mono SE
  119. Millkido 24
  120. 60W mono's design help
  121. Psu question - best place for the caps?
  122. RCA jacks
  123. Hickok 530-B tester charts wanted
  124. comparison of heater termination noise
  125. Some questions about an amplifier design
  126. 2nd harmonic feedback
  127. idea's for a valve preamp
  128. Best line stage tube?
  129. Bias Adjustment point
  130. Looking for a Williamson squematics
  131. Magnavox Console Speaker Impedances
  132. first tube amp
  133. Beam Triodes
  134. Winding output transformers
  135. Anyone Have a Schematic for Wavac MD300B?
  136. PushPull vs ParalelSE
  137. Painting transformer end bells
  138. all-octal schaded pp
  139. New Wood Chassis from Hammond
  140. Strange Noise From Amp
  141. Missing components
  142. Tube headphone amplifier.
  143. Emission - Double Triode
  144. Convergent Audio Technology - where is their Hompage?
  145. Mesh Plate
  146. Cathode follower question
  147. Power supply question
  148. Looking for a 866a powersupply schematic
  149. 211 or 845 project
  150. Modify Dynaco MKIII to use 6AR6s ?
  151. Yet another Dyna ST-70 Input Board
  152. Free Download Vacuum Tube Design Book
  153. driver stage for ppp 6550's
  154. power supply problem
  155. Positive/Negative Feedback
  156. Unholy Alliance Phono Amp
  157. Shrink a tube amp
  158. lampizator srpp help
  159. the secret of best preamplifier
  160. Any issues with adding a grounded power cord to a Heathkit IT-17 tube tester?
  161. HELP to ID push pull/Single Ende
  162. 12BH7,6414,and 12AT7 to drive EL34 better
  163. Testing Tube Amplifiers
  164. trade off higher HT current for lower filament current ?
  165. Any Russian analog of 12BY7 ?
  166. SV572-10 still being made?
  167. PP Output Transformer Testing Puzzle
  168. baby steps
  169. Partial FB: 2 SE + 1 PI = PP?
  170. G-807=807 SE or PP?
  171. 1Hz oscillation with CCS biased output valves
  172. Ultra-linear 6L6 output stage
  173. Transformer or capacitor coupling?
  174. Victor (JVC) Tube Amp MCM-200
  175. MiniWatt N3 problems, oscillation thumping and RF/motor problems.
  176. A2293 pins connection, help !!!
  177. Start-Up Delay for tube amp !
  178. Getting OPT in Japan?
  179. cathode follower tube buffer using 6n6p
  180. Buzz at output until tubes conduct
  181. I need help for amps.
  182. UL Connection results in higher distortion
  183. Header bypass Cap?
  184. DC heater large cap
  185. How to lower preamp output?
  186. Why use a pre amplifier
  187. DHT-buffered NOS-dac
  188. Microphonics 12AY7 v.s. 12AX7
  189. ECC99/2A3 interstage finished, but have one query
  190. Tube lovers in Germany?
  191. preamplifier
  192. Choosing grid leak resistor value -- partly subjective?
  193. What does the acronym "AMW" stand for?
  194. 6C33C distortion spectrum
  195. 6C33C OTL DC schematic needed
  196. help with identifying the cause of preamp problem
  197. Rosenblit 70w Mac amp
  198. Grounding scheme
  199. CC vs Shunt filament supply?
  200. Need opinions on boxing a dual mono line stage
  201. Lets settle the b+ on cold tubes issue!
  202. New 2A3 SET / Simple, but gentle sounding amplifier
  203. Magnavox Console Amp Chassis
  204. transformer identification
  205. 50Wrms audio amplifier
  206. 12B4 have a good sound ???
  207. almarro OPT question
  208. Best EL84pp kit??
  209. Clarion 6L6G Oscillator Amp.
  210. Did you hear an original tube sound?
  211. Designing an OTL / Circlotron
  212. Cayin A55t or AudioSpace AS-8i Mk.III
  213. filament voltage question
  214. 7236 vs 6AS7 ?
  215. Bias Circuit Calculation
  216. 6V6 Hum Issues
  217. Crossover co-axial
  218. Wurlitzer 6420 to audio amplifiers
  219. Advice on Parafeed Output Transformer
  220. mingda mc34ab mods?
  221. small and cheap OTL schematic needed
  222. ecl82 or ecl86 amplifier decision
  223. Well Here Goes... K16LS in Dynaco Chassis?
  224. Not too often you see one of those
  225. Sweet Peach vs Meng Yue EL84
  226. Attempt at giving back: 6L6GC SE amplifier
  227. Best Complete KT88 Amp Kit under $1K?
  228. Webcor Musicale OT puzzle
  229. Audio Research SP3a
  230. Preamp Conordīs with some malfunctioning
  231. Oscillating PSU above certain voltage
  232. B+ voltage load line question
  233. ming da tube amp smell
  234. Rebuilding my amp, would like some input.
  235. do any of these cv4024s seem genuine to you?
  236. Stupid question: EL34 tubes.
  237. PP with Unbalanced concertina = 2nd H?
  238. harmonic distortion
  239. Enhanced Tube's performance
  240. New GU50 SE: SRRP or Cascode for driver?
  241. Hivac XN11 tubes
  242. Conrad Johnson PV-10a hum. Any advice?
  243. Bob Carver's eye candy on eBay
  244. MFA Lumi started "motor-boating" today
  245. New GM70 tube with problem
  246. Interested in building together a 300B tube amp?
  247. cayin a-55t want to use el34
  248. Mc240
  249. Dht ?
  250. too much output impedance?

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