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  1. Bogen L330 - Worth restoring?
  2. Supro model 24 amp transformers
  3. Those Magnificent Television Tubes
  4. Demagnetizing OPT?
  5. Real DIY fun hybrid testing.
  6. Extreme hum in EQ output
  7. 46 triode-strapped DHT spice model
  8. SET output impedance vs speaker impedance
  9. Help with layout of tube preamp
  10. eico HF-65
  11. Wirewound bias pot problem.
  12. Driver for Telefunken RS242 in class A2
  13. Help on my signal generator
  14. another tube fact or fallacy
  15. Gap in Transformer Lams - OCD Check
  16. how to test...
  17. chinese tube amp
  18. tube/valve pc-80
  19. GM-70 All done
  20. Peavey 60/60 classic series schematic
  21. preamp for reciever?
  22. Designing a Tube Rectifier Circuit
  23. Bogen RP40A transformers....what to build with them?
  24. Harmony guitar amp restoration questions
  25. Heads Up for "El Cheapo" Builders
  26. replacing kt66 valves
  27. Help with power transformer identification
  28. 6-8x el84 Per channel
  29. To vary a signal pentode to triode in stages
  30. I have 2 choices for resistive load, need opinions.
  31. Tesla PCC88 7DJ8 dual triode - Help Needed.
  32. PP6550
  33. LT1083 interesting startup problem
  34. ECC33 Driver Stage
  35. Hiraga's Improved Concertina Phase Splitter
  36. 274B a direct replacement for 5AR4/GZ34?
  37. Help power up akai M8 amps
  38. Sonic Frontiers Power 3 Help!
  39. ImPasse Preamp now online
  40. Power supply for tube preamplifier with PCC88
  41. Don't know where to start...
  42. DIY noob
  43. 300B amp cathode bypass
  44. Amp hum with Preamp off
  45. First Project with these tubes
  46. 7189a socket rewiring
  47. Hybrid rectifiers in PSUD2
  48. Feedback / experience wanted on building the Audio note L4 Integrated EL34 PP Amp Kit
  49. About 6AS7BTL Amp
  50. Output Stage Protection Circuit
  51. Silly basic layout question - AC heaters
  52. heater voltage variation for special tubes
  53. Want to build a 807 Vixen.. Looking for help.
  54. Connecting Speakers to Yaqin 10L
  55. Gyrator Filter
  56. 6ab4 tube socket mounting
  57. Any Moto heads? Need OT advice please
  58. Did I break my tube? (new blue glow)
  59. I need help with ccs based LTP
  60. 4033L- rare triode tube.
  61. Single tube linestage schematic wanted: 8CG7
  62. Tetra Sans PS
  63. Tone controls
  64. Vintage Heathkit Electronic Switch as soundcard interface
  65. K-12M extra caps??
  66. Looking for Tube Amp Kit Recommendations
  67. magnatone 280 schematic
  68. high voltage after cap. change
  69. My first tube amp
  70. Recommendations for 6888 triode operating point?
  71. Mullard 12AX7 part uniformity
  72. 6n15n-EB confusion
  73. Noob Question: Phono Preamp
  74. Transformer data required P782
  75. Snubbers on Power Transformer Secondaries
  76. CCS for 6V6 PP amp
  77. screen voltage for triode strapped pentode
  78. New Driver
  79. purpose and value importance of resistor
  80. Values for Vintage Amp's & Preamp's Paragon 12(70's) & More
  81. Help with amp please.
  82. Another Discrete Current Source
  83. 834 Triode amp
  84. Determing the reason for mystery? cap in schematic.
  85. Dyna ST70 to Dual-differential EL34 triode amp project
  86. Tube Signal to Noise Ratio / Dynamic Range
  87. fluctating bias
  88. Just tried a Wire Wound pot for volume.
  89. LED's in the cathode..
  90. Dr. Arthur Loesch
  91. Counterpoint SA-220 mods
  92. Broskie P-P Bridged Output Stage
  93. Would a member fluent in technical German please have a look at this link?
  94. Damaged tube? EL84
  95. Heathkit AA-161 EL84/6BQ5 PP mono integrated amp mod
  96. vk-2100 mod question please
  97. Heater supply
  98. 6111/6n16b - linestage noise problem
  99. OPT specs
  100. Re: Tube Line gain stage with pcc88 or ecc82
  101. Knight-kit KA-55
  102. Can I delay part of a B supply this way?
  103. Tube Preamp turn on circuit
  104. SE GM-70 for 700-800 euro?
  105. filter cap markings
  106. tube buffer noise cancellation
  107. PSUD 2
  108. Bypassing filter caps with Smaller caps
  109. balancing resister for series capacitor in a power supply
  110. Yaqin MC-100b- TJ Full Music 6sn7
  111. Forgive me for I have sinned. Help with Volume Pot!
  112. Help with diagnoses for leak 20 PLEASE
  113. Suggested Circuit Changes to use EM80 in place of 6E2 Eye
  114. Fred Nachbaur SET amp: input capacitor
  115. Heathkit scu 1 and knight kn924 needed schematics
  116. Journey to the centre of a tube..
  117. RIP Dr Jim Marshall
  118. some questions about an ECL82 SE amp
  119. Heathkit Sine/Square wave Generator Manual needed!
  120. SRPP Signal Output Capacitors
  121. simple se input impedance
  122. Kt120 screen current
  123. New or used output xformers to play around with?
  124. Magnavox amp
  125. Help hooking up panel ammeter for bias adjust
  126. opt A-440
  127. OTL Headphone amplifier with Tube ED8000
  128. NJ7P Gone?
  129. MYSTERY METAL TUBES B-1532
  130. noisy tubes
  131. Old amp hum repair
  132. Traveling with DIY Kit in USA-Airport Security Question
  133. Hammond 1650P vs 1650N For EL34 PP
  134. Calibrate a Hickok 6000?
  135. Blown Output Tubes
  136. Kriesler Radiogram refurbishment questions
  137. 6P15P socket connection
  138. Revision 2. Balanced
  139. 6V6 schematic
  140. 6h23N test setting?
  141. 12AH7GT
  142. TUBE Tape Head record / playback amp....
  143. Strange couple comportament 6L6GC RCA black plates.
  144. Reduce Output Volume
  145. Differential Amp CCS Tail SVCS Plate - Noise Issues
  146. Triode curves for EL/PL519
  147. Is that a SRPP circuit with 6SN7?
  148. KT33 Push Pull
  149. Rogers Cadet III Integrated Amp Capacitor Values help
  150. 2a3 alternative after NOS burning
  151. 6SN7 SRPP - oscillating dc offset
  152. Hickok TV-2 'percent quality'
  153. Another Tube I/V converter/preamp for balanced DACs with SE output:build thread
  154. Aikido LV 48V ECC99 or 6N6p
  155. Project: Ultra Small 6C33 / Hybrid Stereo Headphone Amplifier
  156. Back to the tubes
  157. Any use for these PAECO transformer?
  158. Video lectures on tube amplifier design
  159. Millett PP or Allen Wright's PP-2c or?
  160. Magnavox 8608-10
  161. Time relay
  162. Help with Music Angel XD800MKIII mods!?
  163. Little Dot MKIII ??????
  164. Cathode follower wideband amplifier
  165. Wrong base ???
  166. My first DIY schematic... need eagle eyes.!
  167. Stubborn Noise/Oscillation - Another Call for Help
  168. help with power tranny
  169. Tube Amp Repair - SE Michigan
  170. ST 70 Power on!
  171. given choice of low screen voltage or low bias which sounds better or is it equal
  172. How many various OEM brands come from Shuguang?
  173. Bye for now! :)
  174. general power tube output impedance chart?
  175. Should I ground my ST 70?
  176. What is the biggest 300B tube? (Dimension)
  177. 6N16 Valve break-in time
  178. Mystery Amp.
  179. valves tungsten filament
  180. Musical Machine (triode PP EL34) question(s)
  181. M100 Output Tube Problem!
  182. Need to replace the power switch on an EAR 859
  183. Eico pentode vs triode VA
  184. gold grid 5881 - was I had?
  185. DN2540 CCS questions
  186. Operating point for pp KT88
  187. Low THD of Opt Cathode feedback
  188. No bias in S-5 12K, 8L, 16L, etc?
  189. Wanted...broken Golden Tube Audio SE-40
  190. Precise 116 Data Needed
  191. Can you bi-wire using two different taps
  192. Transient Responce of Williamson Amp build
  193. Tantalum caps in the filament supply?
  194. Assistance needed in reconstructing a Golden Tube Audio SE-40
  195. interesting power tube comparison chart
  196. 833A and 3-500Z Circuits
  197. Pilot SA-260 amp and Fischer 400C advice
  198. Long tailed pair phase inverter issues
  199. advice on changing bridge rectifier
  200. 21st Century Maida Regulator
  201. 6CA7 UL Push Pull Amp Design
  202. Tube recommendations anyone?
  203. WE 2C51 Date codes
  204. T500-1 - any ideas?
  205. hybrid power amp and more questions
  206. Yaqin MC-100B - not as powerful as advertised, but still a good value.
  207. 6CB5 AMP BUILD.
  208. ABB France SE OPT??
  209. heater wiring
  210. Audioromy FU29 improvement and upgrades?
  211. Need VFD display filament driver
  212. Power Transformer Limitations
  213. Yaqin 100b channel imbalance
  214. Grid stoppers in class AB2 push-pull arrangenets?
  215. Glass bead inside of KT88
  216. Find tube tester!
  217. mono block amps with 2 x 833C overkill ? even possible to DIY?
  218. happiness is a box of 6550 NOS tubes
  219. Taming the 83
  220. 6550 tube bias characters
  221. Tube Amp Squeel
  222. Bias help Music Angel L$, EL84
  223. Stubborn Oscillation
  224. Moderm "high watt" resistors seem too small
  225. Thyratron based emergency switch?
  226. vT4C.com out of business....
  227. Maggie 8802 6V6
  228. Need Counterpoint SA-3 Board Photo
  229. Diodes in a Graetz Hybrid
  230. Tube Noob with a few questions
  231. KT88 Push Pull Idea... Questions
  232. Superior Instruments tv11 restore question?
  233. Superior Instruments tv11 restore question?
  234. Frequency Response of Output Tubes
  235. symptom of a dying (gain) tube
  236. Grounding in monoblock amps
  237. Seeking 6ME5 data and connection diagram
  238. 12BK5 UL tracing gone boosted triode?
  239. Difference between OPT
  240. Tweaking PP AMP Suggestions Please
  241. DC coupled Sand 'n Glass with Current Feedback
  242. Yaqin 100B fire and spares
  243. Pls help with a preamp
  244. Questions about Aikdo all in one octal
  245. Did I get used to my amp's sound?
  246. Michaelson and Austin TVA1 revB
  247. Joy of birth - a new preamp brought to the world
  248. 5U4G
  249. 6N6P best musicality? Help with modes.
  250. Identifying this capacitor in my Cayin TA-30 amp

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