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  1. LT108 Oscillation sounds like tube rush/white noise
  2. Cool looking tubes anyone...
  3. st70 standby switch/cathode stripping SS rect
  4. BoM for an RH84 mono build?
  5. Signal hum ideas please.
  6. E88CC turbo
  7. SRPP vs. plate loaded, musicality and details
  8. 300B/EL156 Amp
  9. Just new one .all new layout.
  10. Am I correct????
  11. Need help identifying this amp...
  12. The Maggie factor
  13. Help wiring up anLED Bar
  14. E810F/7788 Pinout name/number?
  15. Need some help with a mercury 1200 tube checker
  16. Adjust cathode bias pot - both channels move together. Why?
  17. Building a 45 SET
  18. Stereo Pententometer Questions
  19. Looking for oscilloscope recommendations.
  20. dm160 magic eye help
  21. Tube stage for acoustic guitar?
  22. Zener heater regulator
  23. Dead Time - Correcting for it
  24. ARC Power source+ 12AX7&12AU7 Pre-amplifier
  25. PTC Thermistor for auto fixed bias
  26. How do I calculate output power?
  27. Microcontrollers in tube amps
  28. Dynaco PAT4/Aikido tube preamp
  29. RCA red base 5691 / 5692
  30. Updating my amps....and "hello" :-)
  31. my first attempt
  32. Finished my first PP amp, 6SJ7-6SN7-6v6
  33. Triode PP OP stage combining Blumlein Garter and CCS bias - anyone tried this?
  34. 6U8 Revisited
  35. DePalma redux
  36. Could this be a perfectly linear triode?
  37. Grounding elevated ccs series filament supply
  38. What to do with E182CC's
  39. Angela EL34 opinions please
  40. Chinise 6N1 tube replacement
  41. Ridiculous Hallucinations
  42. Transformer Ratings
  43. dB Meter with tube circuit
  44. Suggestions for pp or se monos
  45. Low filament current tubes
  46. Tube Clearout
  47. First tube amp, it needs maintenance
  48. Need EF86 phono preamplifier shematic
  49. cannot locate documentation on SCA 9190 receiver
  50. Ecc88 pin 9 connection??
  51. VTL Compact100 Monoblock Blows Fuse
  52. 300b driver revisited.
  53. SYclotron schematic
  54. Hum problem
  55. Suppo el34
  56. my new tube experience
  57. LL1682PP Lundahl
  58. BP Ultrapath
  59. Tube shops/sellers in Kiev , Ukraine ?
  60. Headphones with tubes...
  61. A Triad xfmr for a voltage doubler PSU
  62. Ra-100
  63. Series Resistors on Outputs of Transformer?
  64. what's up !? new choke=subsonic pumping
  65. How to get the best out of the 6C33C-B?
  66. TO-220 PCB spacing for HV MOSFETs
  67. Deluxe Reverb Clone too "throaty"
  68. Using a Dynaco ST-70 audio transformer for a guitar amp
  69. Need input on Buffer stage to use in Preamp..
  70. quad output tube help
  71. "Stacking" power transformer secondaries?
  72. Tubes flare on start up!!
  73. Solid state rectifier for AC30 clone
  74. Grid Stopper Advice - Graphs Included!
  75. Western Electric settings for Hickok 600A?
  76. Wanted! single-ended 807 schematic
  77. sputtering 5u4 on diy Wheatfield amp
  78. Is this output transformer faulty?
  79. Help identify variac
  80. Schematic for TL Audio VP-5051 Voice Processor
  81. what's a good layout for a quad EL84 amp on this box?
  82. Scott 350B Tuner; Bridge Rectifier
  83. intermitent static pops from speakers st70
  84. baxandall type tone control for diff amp
  85. Stage amps using DHTs
  86. Tube+OP My headphono & preamp
  87. NFB Clarification
  88. James output transformers
  89. I just bought a an old valve amp
  90. Bias Curves
  91. Triode in Class B or Beam Pentode in Class AB2
  92. Elna Cerafine Caps
  93. help with calibrating a Tv7d/U military tube tester
  94. Cathode Follower driven Phase Inverters
  95. Help finding a tube tester for Stereo tube amps.
  96. Anything horribly wrong with this (LTP w/ LM317 as CCS)
  97. Zenith OPT question
  98. OT/Speaker impedance mismatch
  99. Goldilocks & the 3 (or more) preamp power supplies
  100. Using SE OT for PP.
  101. Need preamplifier schematic/suggestions
  102. Push-Pull vs Push-Pull-Parallel
  103. Odd/Crazy output transformer design?
  104. what 2A3 desgin recommented for home theater
  105. power supply for 10m45s
  106. How badly matched are your IXYS10M45S ?
  107. Class B Push-Pull
  108. Please comment on my design -and a few resistor values..
  109. How to lower even harmonic, keep odd one
  110. PC Mount 9-Pin Tube Socket Layout
  111. datasheet for type 52, help !!!
  112. Another kt88 Monoblock Builders Thread
  113. Question about stacked pawer supplies
  114. ys audio preamp
  115. Need help on 811A partial feedback
  116. Funny console, need ideas...
  117. SMPS experts come on in please!
  118. DC Filament supply boards
  119. Looking for vintage radio sound
  120. Channel death - Chinese EL34 PP
  121. JFET cascoded with tube gain calculation
  122. Fet 6Gk5 ECC88 mc phono stage
  123. Heathkit ol-1 oscilloscope help. Can't get solid spot during setup procedure.
  124. Operating a stereo amp in bridged mode
  125. Mic input Transformer from Triode Elect
  126. Power transformer for tube amp requirements
  127. Tape playback amp
  128. Tube for high input Z
  129. Eico 666 tube tester restoration - need grid control!
  130. Need Schematic/Manual Lambda 71
  131. Replace ECC83 preamp valve with E88CC(6922)
  132. Advice on 6P3S p-p amp schematic, feedback problem?
  133. 6S41S P-P Amp Initial Query
  134. El Cheapo, builders thread
  135. kbu608 rectifier
  136. Looking for nice sounding amp project
  137. B+ for EL84
  138. Output Transformer kt88 6550 pp, Wires? Jukebox? Help.
  139. OPT with foil secondaries
  140. Small Tube Pre Amp - Power Supply Cable
  141. Identification of unknown output transformer
  142. master volume with a extra tube
  143. 10 pounds of power for $15
  144. Unstable Eico HF-87
  145. DIY Dual Channel Active Tube Tone Control
  146. cant eliminate 50hz hum on just one side of the 6h6p headphoneamp
  147. question about the 866a
  148. Trade Custom Speaker Horns for Custom Amp
  149. TVA-1 valve amp - help
  150. Need to source a PSU chassis - simple steel
  151. What should I do with my Dynaco MKIII's
  152. inrush current
  153. Scott 222B output transformer : Compatibility and specs
  154. C3G/C3M Prices
  155. 5v3, 5u4, 5u4gb, 5u4gbm, 5931?
  156. transformer for quad EL84 SE amp - will Antek 360v work
  157. Best Possible Tube Headphone Amp
  158. Help with cheap mono SE
  159. Millkido 24
  160. 60W mono's design help
  161. Psu question - best place for the caps?
  162. 1.2W guitar amp useing:6N2P and 6N1P russian tubes.
  163. RCA jacks
  164. Hickok 530-B tester charts wanted
  165. comparison of heater termination noise
  166. Some questions about an amplifier design
  167. 2nd harmonic feedback
  168. idea's for a valve preamp
  169. Best line stage tube?
  170. Bias Adjustment point
  171. Looking for a Williamson squematics
  172. Magnavox Console Speaker Impedances
  173. first tube amp
  174. Beam Triodes
  175. Winding output transformers
  176. Anyone Have a Schematic for Wavac MD300B?
  177. PushPull vs ParalelSE
  178. Painting transformer end bells
  179. all-octal schaded pp
  180. New Wood Chassis from Hammond
  181. Strange Noise From Amp
  182. Missing components
  183. Tube headphone amplifier.
  184. Emission - Double Triode
  185. Convergent Audio Technology - where is their Hompage?
  186. Mesh Plate
  187. Cathode follower question
  188. Power supply question
  189. Looking for a 866a powersupply schematic
  190. 211 or 845 project
  191. Modify Dynaco MKIII to use 6AR6s ?
  192. Yet another Dyna ST-70 Input Board
  193. Free Download Vacuum Tube Design Book
  194. driver stage for ppp 6550's
  195. power supply problem
  196. Positive/Negative Feedback
  197. Unholy Alliance Phono Amp
  198. Shrink a tube amp
  199. lampizator srpp help
  200. the secret of best preamplifier
  201. Any issues with adding a grounded power cord to a Heathkit IT-17 tube tester?
  202. HELP to ID push pull/Single Ende
  203. 12BH7,6414,and 12AT7 to drive EL34 better
  204. Testing Tube Amplifiers
  205. trade off higher HT current for lower filament current ?
  206. Any Russian analog of 12BY7 ?
  207. SV572-10 still being made?
  208. PP Output Transformer Testing Puzzle
  209. baby steps
  210. Partial FB: 2 SE + 1 PI = PP?
  211. G-807=807 SE or PP?
  212. 1Hz oscillation with CCS biased output valves
  213. Ultra-linear 6L6 output stage
  214. Transformer or capacitor coupling?
  215. Victor (JVC) Tube Amp MCM-200
  216. MiniWatt N3 problems, oscillation thumping and RF/motor problems.
  217. A2293 pins connection, help !!!
  218. Start-Up Delay for tube amp !
  219. Getting OPT in Japan?
  220. cathode follower tube buffer using 6n6p
  221. Buzz at output until tubes conduct
  222. I need help for amps.
  223. UL Connection results in higher distortion
  224. Header bypass Cap?
  225. DC heater large cap
  226. How to lower preamp output?
  227. Why use a pre amplifier
  228. DHT-buffered NOS-dac
  229. Microphonics 12AY7 v.s. 12AX7
  230. ECC99/2A3 interstage finished, but have one query
  231. Tube lovers in Germany?
  232. preamplifier
  233. Choosing grid leak resistor value -- partly subjective?
  234. What does the acronym "AMW" stand for?
  235. 6C33C distortion spectrum
  236. 6C33C OTL DC schematic needed
  237. help with identifying the cause of preamp problem
  238. Rosenblit 70w Mac amp
  239. Grounding scheme
  240. CC vs Shunt filament supply?
  241. Need opinions on boxing a dual mono line stage
  242. Lets settle the b+ on cold tubes issue!
  243. New 2A3 SET / Simple, but gentle sounding amplifier
  244. Magnavox Console Amp Chassis
  245. transformer identification
  246. 50Wrms audio amplifier
  247. 12B4 have a good sound ???
  248. almarro OPT question
  249. Best EL84pp kit??
  250. Clarion 6L6G Oscillator Amp.

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