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  1. Those Magnificent Television Tubes
  2. Demagnetizing OPT?
  3. Real DIY fun hybrid testing.
  4. Extreme hum in EQ output
  5. 46 triode-strapped DHT spice model
  6. SET output impedance vs speaker impedance
  7. Help with layout of tube preamp
  8. eico HF-65
  9. Wirewound bias pot problem.
  10. Driver for Telefunken RS242 in class A2
  11. Help on my signal generator
  12. another tube fact or fallacy
  13. Gap in Transformer Lams - OCD Check
  14. how to test...
  15. chinese tube amp
  16. tube/valve pc-80
  17. GM-70 All done
  18. preamp for reciever?
  19. Designing a Tube Rectifier Circuit
  20. Bogen RP40A transformers....what to build with them?
  21. Heads Up for "El Cheapo" Builders
  22. replacing kt66 valves
  23. Help with power transformer identification
  24. 6-8x el84 Per channel
  25. To vary a signal pentode to triode in stages
  26. I have 2 choices for resistive load, need opinions.
  27. Tesla PCC88 7DJ8 dual triode - Help Needed.
  28. PP6550
  29. LT1083 interesting startup problem
  30. ECC33 Driver Stage
  31. Hiraga's Improved Concertina Phase Splitter
  32. 274B a direct replacement for 5AR4/GZ34?
  33. Help power up akai M8 amps
  34. Sonic Frontiers Power 3 Help!
  35. ImPasse Preamp now online
  36. Power supply for tube preamplifier with PCC88
  37. Don't know where to start...
  38. DIY noob
  39. 300B amp cathode bypass
  40. Amp hum with Preamp off
  41. First Project with these tubes
  42. 7189a socket rewiring
  43. Hybrid rectifiers in PSUD2
  44. Feedback / experience wanted on building the Audio note L4 Integrated EL34 PP Amp Kit
  45. About 6AS7BTL Amp
  46. Output Stage Protection Circuit
  47. Silly basic layout question - AC heaters
  48. heater voltage variation for special tubes
  49. Want to build a 807 Vixen.. Looking for help.
  50. Connecting Speakers to Yaqin 10L
  51. Gyrator Filter
  52. 6ab4 tube socket mounting
  53. Any Moto heads? Need OT advice please
  54. Did I break my tube? (new blue glow)
  55. I need help with ccs based LTP
  56. 4033L- rare triode tube.
  57. Single tube linestage schematic wanted: 8CG7
  58. Tetra Sans PS
  59. Tone controls
  60. Vintage Heathkit Electronic Switch as soundcard interface
  61. K-12M extra caps??
  62. Looking for Tube Amp Kit Recommendations
  63. high voltage after cap. change
  64. My first tube amp
  65. Recommendations for 6888 triode operating point?
  66. Mullard 12AX7 part uniformity
  67. 6n15n-EB confusion
  68. Noob Question: Phono Preamp
  69. Transformer data required P782
  70. Snubbers on Power Transformer Secondaries
  71. CCS for 6V6 PP amp
  72. screen voltage for triode strapped pentode
  73. New Driver
  74. purpose and value importance of resistor
  75. Values for Vintage Amp's & Preamp's Paragon 12(70's) & More
  76. Help with amp please.
  77. Another Discrete Current Source
  78. 834 Triode amp
  79. Determing the reason for mystery? cap in schematic.
  80. Dyna ST70 to Dual-differential EL34 triode amp project
  81. Tube Signal to Noise Ratio / Dynamic Range
  82. fluctating bias
  83. Just tried a Wire Wound pot for volume.
  84. LED's in the cathode..
  85. Dr. Arthur Loesch
  86. Counterpoint SA-220 mods
  87. Broskie P-P Bridged Output Stage
  88. Would a member fluent in technical German please have a look at this link?
  89. Damaged tube? EL84
  90. Heathkit AA-161 EL84/6BQ5 PP mono integrated amp mod
  91. vk-2100 mod question please
  92. Heater supply
  93. 6111/6n16b - linestage noise problem
  94. OPT specs
  95. Re: Tube Line gain stage with pcc88 or ecc82
  96. Knight-kit KA-55
  97. Can I delay part of a B supply this way?
  98. Tube Preamp turn on circuit
  99. SE GM-70 for 700-800 euro?
  100. filter cap markings
  101. tube buffer noise cancellation
  102. PSUD 2
  103. Bypassing filter caps with Smaller caps
  104. balancing resister for series capacitor in a power supply
  105. Yaqin MC-100b- TJ Full Music 6sn7
  106. Forgive me for I have sinned. Help with Volume Pot!
  107. Help with diagnoses for leak 20 PLEASE
  108. Suggested Circuit Changes to use EM80 in place of 6E2 Eye
  109. Fred Nachbaur SET amp: input capacitor
  110. Heathkit scu 1 and knight kn924 needed schematics
  111. Journey to the centre of a tube..
  112. some questions about an ECL82 SE amp
  113. Heathkit Sine/Square wave Generator Manual needed!
  114. SRPP Signal Output Capacitors
  115. simple se input impedance
  116. Kt120 screen current
  117. New or used output xformers to play around with?
  118. Magnavox amp
  119. Help hooking up panel ammeter for bias adjust
  120. opt A-440
  121. OTL Headphone amplifier with Tube ED8000
  122. NJ7P Gone?
  123. MYSTERY METAL TUBES B-1532
  124. noisy tubes
  125. Old amp hum repair
  126. Traveling with DIY Kit in USA-Airport Security Question
  127. Hammond 1650P vs 1650N For EL34 PP
  128. Calibrate a Hickok 6000?
  129. Blown Output Tubes
  130. Kriesler Radiogram refurbishment questions
  131. 6P15P socket connection
  132. Revision 2. Balanced
  133. 6V6 schematic
  134. 6h23N test setting?
  135. 12AH7GT
  136. TUBE Tape Head record / playback amp....
  137. Strange couple comportament 6L6GC RCA black plates.
  138. Reduce Output Volume
  139. Differential Amp CCS Tail SVCS Plate - Noise Issues
  140. Triode curves for EL/PL519
  141. Is that a SRPP circuit with 6SN7?
  142. KT33 Push Pull
  143. Rogers Cadet III Integrated Amp Capacitor Values help
  144. 2a3 alternative after NOS burning
  145. 6SN7 SRPP - oscillating dc offset
  146. Hickok TV-2 'percent quality'
  147. Another Tube I/V converter/preamp for balanced DACs with SE output:build thread
  148. Aikido LV 48V ECC99 or 6N6p
  149. Project: Ultra Small 6C33 / Hybrid Stereo Headphone Amplifier
  150. Back to the tubes
  151. Any use for these PAECO transformer?
  152. Video lectures on tube amplifier design
  153. Millett PP or Allen Wright's PP-2c or?
  154. Magnavox 8608-10
  155. Time relay
  156. Help with Music Angel XD800MKIII mods!?
  157. Little Dot MKIII ??????
  158. Cathode follower wideband amplifier
  159. Wrong base ???
  160. My first DIY schematic... need eagle eyes.!
  161. Stubborn Noise/Oscillation - Another Call for Help
  162. help with power tranny
  163. Tube Amp Repair - SE Michigan
  164. ST 70 Power on!
  165. given choice of low screen voltage or low bias which sounds better or is it equal
  166. How many various OEM brands come from Shuguang?
  167. Bye for now! :)
  168. general power tube output impedance chart?
  169. Should I ground my ST 70?
  170. What is the biggest 300B tube? (Dimension)
  171. 6N16 Valve break-in time
  172. Mystery Amp.
  173. valves tungsten filament
  174. Musical Machine (triode PP EL34) question(s)
  175. M100 Output Tube Problem!
  176. Need to replace the power switch on an EAR 859
  177. Eico pentode vs triode VA
  178. gold grid 5881 - was I had?
  179. DN2540 CCS questions
  180. Operating point for pp KT88
  181. Low THD of Opt Cathode feedback
  182. No bias in S-5 12K, 8L, 16L, etc?
  183. Wanted...broken Golden Tube Audio SE-40
  184. Precise 116 Data Needed
  185. Can you bi-wire using two different taps
  186. Transient Responce of Williamson Amp build
  187. Tantalum caps in the filament supply?
  188. Assistance needed in reconstructing a Golden Tube Audio SE-40
  189. interesting power tube comparison chart
  190. 833A and 3-500Z Circuits
  191. Pilot SA-260 amp and Fischer 400C advice
  192. Long tailed pair phase inverter issues
  193. advice on changing bridge rectifier
  194. 21st Century Maida Regulator
  195. 6CA7 UL Push Pull Amp Design
  196. Tube recommendations anyone?
  197. WE 2C51 Date codes
  198. T500-1 - any ideas?
  199. hybrid power amp and more questions
  200. Yaqin MC-100B - not as powerful as advertised, but still a good value.
  201. 6CB5 AMP BUILD.
  202. ABB France SE OPT??
  203. heater wiring
  204. Audioromy FU29 improvement and upgrades?
  205. Need VFD display filament driver
  206. Power Transformer Limitations
  207. Yaqin 100b channel imbalance
  208. Grid stoppers in class AB2 push-pull arrangenets?
  209. Glass bead inside of KT88
  210. Find tube tester!
  211. mono block amps with 2 x 833C overkill ? even possible to DIY?
  212. happiness is a box of 6550 NOS tubes
  213. Taming the 83
  214. 6550 tube bias characters
  215. Tube Amp Squeel
  216. Bias help Music Angel L$, EL84
  217. Stubborn Oscillation
  218. Moderm "high watt" resistors seem too small
  219. Thyratron based emergency switch?
  220. vT4C.com out of business....
  221. Maggie 8802 6V6
  222. Need Counterpoint SA-3 Board Photo
  223. Diodes in a Graetz Hybrid
  224. Tube Noob with a few questions
  225. KT88 Push Pull Idea... Questions
  226. Superior Instruments tv11 restore question?
  227. Superior Instruments tv11 restore question?
  228. Frequency Response of Output Tubes
  229. symptom of a dying (gain) tube
  230. Grounding in monoblock amps
  231. Seeking 6ME5 data and connection diagram
  232. 12BK5 UL tracing gone boosted triode?
  233. Difference between OPT
  234. Tweaking PP AMP Suggestions Please
  235. DC coupled Sand 'n Glass with Current Feedback
  236. Yaqin 100B fire and spares
  237. Pls help with a preamp
  238. Questions about Aikdo all in one octal
  239. Did I get used to my amp's sound?
  240. Michaelson and Austin TVA1 revB
  241. Joy of birth - a new preamp brought to the world
  242. 5U4G
  243. 6N6P best musicality? Help with modes.
  244. Identifying this capacitor in my Cayin TA-30 amp
  245. GU50 Push-Pull version1
  246. Common mode feedback
  247. Stuck with repair ;(
  248. active hum cancellation. PCB idea?
  249. Why this huge cap is so light?
  250. OPT performance

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