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  1. SRPP vs. plate loaded, musicality and details
  2. 300B/EL156 Amp
  3. Just new one .all new layout.
  4. Am I correct????
  5. Need help identifying this amp...
  6. The Maggie factor
  7. Help wiring up anLED Bar
  8. E810F/7788 Pinout name/number?
  9. Adjust cathode bias pot - both channels move together. Why?
  10. Building a 45 SET
  11. Stereo Pententometer Questions
  12. dm160 magic eye help
  13. Zener heater regulator
  14. Dead Time - Correcting for it
  15. ARC Power source+ 12AX7&12AU7 Pre-amplifier
  16. PTC Thermistor for auto fixed bias
  17. How do I calculate output power?
  18. Microcontrollers in tube amps
  19. Dynaco PAT4/Aikido tube preamp
  20. RCA red base 5691 / 5692
  21. Updating my amps....and "hello" :-)
  22. my first attempt
  23. Finished my first PP amp, 6SJ7-6SN7-6v6
  24. Triode PP OP stage combining Blumlein Garter and CCS bias - anyone tried this?
  25. 6U8 Revisited
  26. DePalma redux
  27. Could this be a perfectly linear triode?
  28. Grounding elevated ccs series filament supply
  29. What to do with E182CC's
  30. Angela EL34 opinions please
  31. Chinese 6N1 tube replacement
  32. Ridiculous Hallucinations
  33. Transformer Ratings
  34. dB Meter with tube circuit
  35. Suggestions for pp or se monos
  36. Low filament current tubes
  37. Tube Clearout
  38. First tube amp, it needs maintenance
  39. Need EF86 phono preamplifier shematic
  40. cannot locate documentation on SCA 9190 receiver
  41. Ecc88 pin 9 connection??
  42. VTL Compact100 Monoblock Blows Fuse
  43. 300b driver revisited.
  44. SYclotron schematic
  45. Hum problem
  46. Suppo el34
  47. my new tube experience
  48. LL1682PP Lundahl
  49. BP Ultrapath
  50. Tube shops/sellers in Kiev , Ukraine ?
  51. Headphones with tubes...
  52. A Triad xfmr for a voltage doubler PSU
  53. Ra-100
  54. Series Resistors on Outputs of Transformer?
  55. what's up !? new choke=subsonic pumping
  56. How to get the best out of the 6C33C-B?
  57. TO-220 PCB spacing for HV MOSFETs
  58. Need input on Buffer stage to use in Preamp..
  59. quad output tube help
  60. "Stacking" power transformer secondaries?
  61. Tubes flare on start up!!
  62. Grid Stopper Advice - Graphs Included!
  63. Wanted! single-ended 807 schematic
  64. sputtering 5u4 on diy Wheatfield amp
  65. Is this output transformer faulty?
  66. Help identify variac
  67. what's a good layout for a quad EL84 amp on this box?
  68. Scott 350B Tuner; Bridge Rectifier
  69. intermitent static pops from speakers st70
  70. baxandall type tone control for diff amp
  71. Stage amps using DHTs
  72. Tube+OP My headphono & preamp
  73. NFB Clarification
  74. James output transformers
  75. I just bought a an old valve amp
  76. Bias Curves
  77. Triode in Class B or Beam Pentode in Class AB2
  78. Cathode Follower driven Phase Inverters
  79. Help finding a tube tester for Stereo tube amps.
  80. Anything horribly wrong with this (LTP w/ LM317 as CCS)
  81. Zenith OPT question
  82. OT/Speaker impedance mismatch
  83. Goldilocks & the 3 (or more) preamp power supplies
  84. Using SE OT for PP.
  85. Need preamplifier schematic/suggestions
  86. Push-Pull vs Push-Pull-Parallel
  87. Odd/Crazy output transformer design?
  88. what 2A3 desgin recommented for home theater
  89. power supply for 10m45s
  90. How badly matched are your IXYS10M45S ?
  91. Class B Push-Pull
  92. Please comment on my design -and a few resistor values..
  93. How to lower even harmonic, keep odd one
  94. PC Mount 9-Pin Tube Socket Layout
  95. datasheet for type 52, help !!!
  96. Another kt88 Monoblock Builders Thread
  97. Question about stacked pawer supplies
  98. ys audio preamp
  99. Need help on 811A partial feedback
  100. Funny console, need ideas...
  101. SMPS experts come on in please!
  102. DC Filament supply boards
  103. Looking for vintage radio sound
  104. Channel death - Chinese EL34 PP
  105. JFET cascoded with tube gain calculation
  106. Fet 6Gk5 ECC88 mc phono stage
  107. Operating a stereo amp in bridged mode
  108. Mic input Transformer from Triode Elect
  109. Power transformer for tube amp requirements
  110. Tape playback amp
  111. Replace ECC83 preamp valve with E88CC(6922)
  112. Advice on 6P3S p-p amp schematic, feedback problem?
  113. 6S41S P-P Amp Initial Query
  114. El Cheapo, builders thread
  115. kbu608 rectifier
  116. Looking for nice sounding amp project
  117. B+ for EL84
  118. Output Transformer kt88 6550 pp, Wires? Jukebox? Help.
  119. OPT with foil secondaries
  120. Small Tube Pre Amp - Power Supply Cable
  121. Identification of unknown output transformer
  122. master volume with a extra tube
  123. 10 pounds of power for $15
  124. Unstable Eico HF-87
  125. DIY Dual Channel Active Tube Tone Control
  126. cant eliminate 50hz hum on just one side of the 6h6p headphoneamp
  127. question about the 866a
  128. Trade Custom Speaker Horns for Custom Amp
  129. TVA-1 valve amp - help
  130. Need to source a PSU chassis - simple steel
  131. What should I do with my Dynaco MKIII's
  132. inrush current
  133. Scott 222B output transformer : Compatibility and specs
  134. C3G/C3M Prices
  135. 5v3, 5u4, 5u4gb, 5u4gbm, 5931?
  136. transformer for quad EL84 SE amp - will Antek 360v work
  137. Best Possible Tube Headphone Amp
  138. Help with cheap mono SE
  139. Millkido 24
  140. 60W mono's design help
  141. Psu question - best place for the caps?
  142. RCA jacks
  143. comparison of heater termination noise
  144. Some questions about an amplifier design
  145. 2nd harmonic feedback
  146. idea's for a valve preamp
  147. Best line stage tube?
  148. Bias Adjustment point
  149. Looking for Williamson schematic
  150. Magnavox Console Speaker Impedances
  151. first tube amp
  152. Beam Triodes
  153. Winding output transformers
  154. Anyone Have a Schematic for Wavac MD300B?
  155. PushPull vs ParalelSE
  156. Painting transformer end bells
  157. all-octal schaded pp
  158. Strange Noise From Amp
  159. Missing components
  160. Tube headphone amplifier.
  161. Emission - Double Triode
  162. Convergent Audio Technology - where is their Hompage?
  163. Mesh Plate
  164. Cathode follower question
  165. Power supply question
  166. Looking for a 866a powersupply schematic
  167. 211 or 845 project
  168. Modify Dynaco MKIII to use 6AR6s ?
  169. Yet another Dyna ST-70 Input Board
  170. Free Download Vacuum Tube Design Book
  171. driver stage for ppp 6550's
  172. power supply problem
  173. Positive/Negative Feedback
  174. Unholy Alliance Phono Amp
  175. Shrink a tube amp
  176. lampizator srpp help
  177. the secret of best preamplifier
  178. HELP to ID push pull/Single Ende
  179. 12BH7,6414,and 12AT7 to drive EL34 better
  180. Testing Tube Amplifiers
  181. trade off higher HT current for lower filament current ?
  182. Any Russian analog of 12BY7 ?
  183. SV572-10 still being made?
  184. PP Output Transformer Testing Puzzle
  185. baby steps
  186. Partial FB: 2 SE + 1 PI = PP?
  187. G-807=807 SE or PP?
  188. 1Hz oscillation with CCS biased output valves
  189. Ultra-linear 6L6 output stage
  190. Transformer or capacitor coupling?
  191. Victor (JVC) Tube Amp MCM-200
  192. MiniWatt N3 problems, oscillation thumping and RF/motor problems.
  193. A2293 pins connection, help !!!
  194. Start-Up Delay for tube amp !
  195. Getting OPT in Japan?
  196. cathode follower tube buffer using 6n6p
  197. Buzz at output until tubes conduct
  198. I need help for amps.
  199. UL Connection results in higher distortion
  200. Header bypass Cap?
  201. DC heater large cap
  202. How to lower preamp output?
  203. Why use a pre amplifier
  204. DHT-buffered NOS-dac
  205. Microphonics 12AY7 v.s. 12AX7
  206. ECC99/2A3 interstage finished, but have one query
  207. Tube lovers in Germany?
  208. preamplifier
  209. Choosing grid leak resistor value -- partly subjective?
  210. What does the acronym "AMW" stand for?
  211. 6C33C distortion spectrum
  212. 6C33C OTL DC schematic needed
  213. help with identifying the cause of preamp problem
  214. Rosenblit 70w Mac amp
  215. Grounding scheme
  216. CC vs Shunt filament supply?
  217. Need opinions on boxing a dual mono line stage
  218. Lets settle the b+ on cold tubes issue!
  219. New 2A3 SET / Simple, but gentle sounding amplifier
  220. Magnavox Console Amp Chassis
  221. transformer identification
  222. 50Wrms audio amplifier
  223. 12B4 have a good sound ???
  224. almarro OPT question
  225. Best EL84pp kit??
  226. Clarion 6L6G Oscillator Amp.
  227. Did you hear an original tube sound?
  228. Designing an OTL / Circlotron
  229. Cayin A55t or AudioSpace AS-8i Mk.III
  230. filament voltage question
  231. 7236 vs 6AS7 ?
  232. Bias Circuit Calculation
  233. 6V6 Hum Issues
  234. Crossover co-axial
  235. Wurlitzer 6420 to audio amplifiers
  236. Advice on Parafeed Output Transformer
  237. mingda mc34ab mods?
  238. small and cheap OTL schematic needed
  239. ecl82 or ecl86 amplifier decision
  240. Well Here Goes... K16LS in Dynaco Chassis?
  241. Not too often you see one of those
  242. Sweet Peach vs Meng Yue EL84
  243. Attempt at giving back: 6L6GC SE amplifier
  244. Best Complete KT88 Amp Kit under $1K?
  245. Webcor Musicale OT puzzle
  246. Audio Research SP3a
  247. Preamp Conordīs with some malfunctioning
  248. Oscillating PSU above certain voltage
  249. B+ voltage load line question
  250. ming da tube amp smell

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