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  1. Anything horribly wrong with this (LTP w/ LM317 as CCS)
  2. Zenith OPT question
  3. OT/Speaker impedance mismatch
  4. Goldilocks & the 3 (or more) preamp power supplies
  5. Using SE OT for PP.
  6. Need preamplifier schematic/suggestions
  7. Push-Pull vs Push-Pull-Parallel
  8. Odd/Crazy output transformer design?
  9. what 2A3 desgin recommented for home theater
  10. power supply for 10m45s
  11. How badly matched are your IXYS10M45S ?
  12. Class B Push-Pull
  13. Please comment on my design -and a few resistor values..
  14. How to lower even harmonic, keep odd one
  15. PC Mount 9-Pin Tube Socket Layout
  16. datasheet for type 52, help !!!
  17. Another kt88 Monoblock Builders Thread
  18. Question about stacked pawer supplies
  19. ys audio preamp
  20. Need help on 811A partial feedback
  21. Funny console, need ideas...
  22. SMPS experts come on in please!
  23. DC Filament supply boards
  24. Looking for vintage radio sound
  25. Channel death - Chinese EL34 PP
  26. JFET cascoded with tube gain calculation
  27. Fet 6Gk5 ECC88 mc phono stage
  28. Heathkit ol-1 oscilloscope help. Can't get solid spot during setup procedure.
  29. Operating a stereo amp in bridged mode
  30. Mic input Transformer from Triode Elect
  31. Power transformer for tube amp requirements
  32. Tape playback amp
  33. Eico 666 tube tester restoration - need grid control!
  34. Need Schematic/Manual Lambda 71
  35. Replace ECC83 preamp valve with E88CC(6922)
  36. Advice on 6P3S p-p amp schematic, feedback problem?
  37. 6S41S P-P Amp Initial Query
  38. El Cheapo, builders thread
  39. kbu608 rectifier
  40. Looking for nice sounding amp project
  41. B+ for EL84
  42. Output Transformer kt88 6550 pp, Wires? Jukebox? Help.
  43. OPT with foil secondaries
  44. Small Tube Pre Amp - Power Supply Cable
  45. Identification of unknown output transformer
  46. master volume with a extra tube
  47. 10 pounds of power for $15
  48. Unstable Eico HF-87
  49. DIY Dual Channel Active Tube Tone Control
  50. cant eliminate 50hz hum on just one side of the 6h6p headphoneamp
  51. question about the 866a
  52. Trade Custom Speaker Horns for Custom Amp
  53. TVA-1 valve amp - help
  54. Need to source a PSU chassis - simple steel
  55. What should I do with my Dynaco MKIII's
  56. inrush current
  57. Scott 222B output transformer : Compatibility and specs
  58. C3G/C3M Prices
  59. 5v3, 5u4, 5u4gb, 5u4gbm, 5931?
  60. transformer for quad EL84 SE amp - will Antek 360v work
  61. Best Possible Tube Headphone Amp
  62. Help with cheap mono SE
  63. Millkido 24
  64. 60W mono's design help
  65. Psu question - best place for the caps?
  66. RCA jacks
  67. Hickok 530-B tester charts wanted
  68. comparison of heater termination noise
  69. Some questions about an amplifier design
  70. 2nd harmonic feedback
  71. idea's for a valve preamp
  72. Best line stage tube?
  73. Bias Adjustment point
  74. Looking for a Williamson squematics
  75. Magnavox Console Speaker Impedances
  76. first tube amp
  77. Beam Triodes
  78. Winding output transformers
  79. Anyone Have a Schematic for Wavac MD300B?
  80. PushPull vs ParalelSE
  81. Painting transformer end bells
  82. all-octal schaded pp
  83. New Wood Chassis from Hammond
  84. Strange Noise From Amp
  85. Missing components
  86. Tube headphone amplifier.
  87. Emission - Double Triode
  88. Convergent Audio Technology - where is their Hompage?
  89. Mesh Plate
  90. Cathode follower question
  91. Power supply question
  92. Looking for a 866a powersupply schematic
  93. 211 or 845 project
  94. Modify Dynaco MKIII to use 6AR6s ?
  95. Yet another Dyna ST-70 Input Board
  96. Free Download Vacuum Tube Design Book
  97. driver stage for ppp 6550's
  98. power supply problem
  99. Positive/Negative Feedback
  100. Unholy Alliance Phono Amp
  101. Shrink a tube amp
  102. lampizator srpp help
  103. the secret of best preamplifier
  104. Any issues with adding a grounded power cord to a Heathkit IT-17 tube tester?
  105. HELP to ID push pull/Single Ende
  106. 12BH7,6414,and 12AT7 to drive EL34 better
  107. Testing Tube Amplifiers
  108. trade off higher HT current for lower filament current ?
  109. Any Russian analog of 12BY7 ?
  110. SV572-10 still being made?
  111. PP Output Transformer Testing Puzzle
  112. baby steps
  113. Partial FB: 2 SE + 1 PI = PP?
  114. G-807=807 SE or PP?
  115. 1Hz oscillation with CCS biased output valves
  116. Ultra-linear 6L6 output stage
  117. Transformer or capacitor coupling?
  118. Victor (JVC) Tube Amp MCM-200
  119. MiniWatt N3 problems, oscillation thumping and RF/motor problems.
  120. A2293 pins connection, help !!!
  121. Start-Up Delay for tube amp !
  122. Getting OPT in Japan?
  123. cathode follower tube buffer using 6n6p
  124. Buzz at output until tubes conduct
  125. I need help for amps.
  126. UL Connection results in higher distortion
  127. Header bypass Cap?
  128. DC heater large cap
  129. How to lower preamp output?
  130. Why use a pre amplifier
  131. DHT-buffered NOS-dac
  132. Microphonics 12AY7 v.s. 12AX7
  133. ECC99/2A3 interstage finished, but have one query
  134. Tube lovers in Germany?
  135. preamplifier
  136. Choosing grid leak resistor value -- partly subjective?
  137. What does the acronym "AMW" stand for?
  138. 6C33C distortion spectrum
  139. 6C33C OTL DC schematic needed
  140. help with identifying the cause of preamp problem
  141. Rosenblit 70w Mac amp
  142. Grounding scheme
  143. CC vs Shunt filament supply?
  144. Need opinions on boxing a dual mono line stage
  145. Lets settle the b+ on cold tubes issue!
  146. New 2A3 SET / Simple, but gentle sounding amplifier
  147. Magnavox Console Amp Chassis
  148. transformer identification
  149. 50Wrms audio amplifier
  150. 12B4 have a good sound ???
  151. almarro OPT question
  152. Best EL84pp kit??
  153. Clarion 6L6G Oscillator Amp.
  154. Did you hear an original tube sound?
  155. Designing an OTL / Circlotron
  156. Cayin A55t or AudioSpace AS-8i Mk.III
  157. filament voltage question
  158. 7236 vs 6AS7 ?
  159. Bias Circuit Calculation
  160. 6V6 Hum Issues
  161. Crossover co-axial
  162. Wurlitzer 6420 to audio amplifiers
  163. Advice on Parafeed Output Transformer
  164. mingda mc34ab mods?
  165. small and cheap OTL schematic needed
  166. ecl82 or ecl86 amplifier decision
  167. Well Here Goes... K16LS in Dynaco Chassis?
  168. Not too often you see one of those
  169. Sweet Peach vs Meng Yue EL84
  170. Attempt at giving back: 6L6GC SE amplifier
  171. Best Complete KT88 Amp Kit under $1K?
  172. Webcor Musicale OT puzzle
  173. Audio Research SP3a
  174. Preamp Conordīs with some malfunctioning
  175. Oscillating PSU above certain voltage
  176. B+ voltage load line question
  177. ming da tube amp smell
  178. Rebuilding my amp, would like some input.
  179. do any of these cv4024s seem genuine to you?
  180. Stupid question: EL34 tubes.
  181. PP with Unbalanced concertina = 2nd H?
  182. harmonic distortion
  183. Enhanced Tube's performance
  184. New GU50 SE: SRRP or Cascode for driver?
  185. Hivac XN11 tubes
  186. Conrad Johnson PV-10a hum. Any advice?
  187. Bob Carver's eye candy on eBay
  188. MFA Lumi started "motor-boating" today
  189. New GM70 tube with problem
  190. Interested in building together a 300B tube amp?
  191. cayin a-55t want to use el34
  192. Mc240
  193. Dht ?
  194. too much output impedance?
  195. College-proofing an ST-70 (aka autobias+ST-70)
  196. reverse polarity of the chinese goods?
  197. 6bg6 and 8k opt power amp project
  198. Need some calculation assist for a psu
  199. Baldwin Transformer Swap
  200. THD, s/n and IM noisy measurements
  201. Little dot 2+, got spark
  202. (INDIA) urgent - high-quality amp builders/techs in Delhi?
  203. What causes saturation in tubes?
  204. Plug and Play Power Supply
  205. GE 5814 and 12AUCIFTE
  206. Amplifier oscillates - advice sought
  207. 50s Amplifier
  208. power supply design question 832A amp
  209. Klimo power supply advice
  210. Earth Not Connected
  211. DC heater supply for phono pre
  212. Audio Note P2SE problem
  213. Aikido Transformers - Good Choice?
  214. Caps before or after MOSFET V-regulator
  215. Which capacitors should I replace?
  216. Testing Amplifiers
  217. Choosing choke valuein pre amp tube
  218. Supertriode with PNP transistors
  219. too much gain
  220. Lloyd's Vintage High Fidelity Audio Devices - both Tube and Solid State
  221. Cheap eBay "zoe_tsan" tube kits - worth anything?
  222. Bell Vintage High Fidelity Audio Devices - both Tube and Solid State
  223. Small Tube Amp with Hum
  224. tube rectifier question
  225. Unison Research S6 schematics
  226. vacuum tube amplifiers should be produced like this?
  227. 6d22s to 6cj3
  228. pot in tube preamp
  229. Mable Audio vs. Suppo audio sound quality
  230. swdfasdfsdf
  231. measuring heater voltage
  232. Need a circuit around these tubes.
  233. Single-Ended 13E1 amplifier
  234. Whats' the max allowable / reasonable ripple in SE amp?
  235. What amp kits are out there?
  236. ECC84/6N14P for audio
  237. PSU ignorant
  238. How to define a quality OT?
  239. Looking for some build advice
  240. SS CCS and distortion
  241. the valve with no markings
  242. Pentode AB1 design school???
  243. Capability of Sony/Tamradio SE Output Transformers
  244. my CELLINI triode amp
  245. 45-based SET -> Pass Labs F4
  246. Testing Amplifiers - Speaker or dummy load
  247. Quiet amp hums with signal source or input directly tied to star earth??
  248. amp output testing
  249. S5 Amp Comparison?
  250. How to Ground a Preamp PCB Board?

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