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  1. GM-70 All done
  2. Peavey 60/60 classic series schematic
  3. preamp for reciever?
  4. Designing a Tube Rectifier Circuit
  5. Bogen RP40A transformers....what to build with them?
  6. Harmony guitar amp restoration questions
  7. Heads Up for "El Cheapo" Builders
  8. replacing kt66 valves
  9. Help with power transformer identification
  10. 6-8x el84 Per channel
  11. To vary a signal pentode to triode in stages
  12. I have 2 choices for resistive load, need opinions.
  13. Tesla PCC88 7DJ8 dual triode - Help Needed.
  14. PP6550
  15. LT1083 interesting startup problem
  16. ECC33 Driver Stage
  17. Hiraga's Improved Concertina Phase Splitter
  18. 274B a direct replacement for 5AR4/GZ34?
  19. Help power up akai M8 amps
  20. Sonic Frontiers Power 3 Help!
  21. ImPasse Preamp now online
  22. Power supply for tube preamplifier with PCC88
  23. Don't know where to start...
  24. DIY noob
  25. 300B amp cathode bypass
  26. Amp hum with Preamp off
  27. First Project with these tubes
  28. 7189a socket rewiring
  29. Hybrid rectifiers in PSUD2
  30. Feedback / experience wanted on building the Audio note L4 Integrated EL34 PP Amp Kit
  31. About 6AS7BTL Amp
  32. Output Stage Protection Circuit
  33. Silly basic layout question - AC heaters
  34. heater voltage variation for special tubes
  35. Want to build a 807 Vixen.. Looking for help.
  36. Connecting Speakers to Yaqin 10L
  37. Gyrator Filter
  38. 6ab4 tube socket mounting
  39. Any Moto heads? Need OT advice please
  40. Did I break my tube? (new blue glow)
  41. I need help with ccs based LTP
  42. 4033L- rare triode tube.
  43. Single tube linestage schematic wanted: 8CG7
  44. Tetra Sans PS
  45. Tone controls
  46. Vintage Heathkit Electronic Switch as soundcard interface
  47. K-12M extra caps??
  48. Looking for Tube Amp Kit Recommendations
  49. magnatone 280 schematic
  50. high voltage after cap. change
  51. My first tube amp
  52. Recommendations for 6888 triode operating point?
  53. Mullard 12AX7 part uniformity
  54. 6n15n-EB confusion
  55. Noob Question: Phono Preamp
  56. Transformer data required P782
  57. Snubbers on Power Transformer Secondaries
  58. CCS for 6V6 PP amp
  59. screen voltage for triode strapped pentode
  60. New Driver
  61. purpose and value importance of resistor
  62. Values for Vintage Amp's & Preamp's Paragon 12(70's) & More
  63. Help with amp please.
  64. Another Discrete Current Source
  65. 834 Triode amp
  66. Determing the reason for mystery? cap in schematic.
  67. Dyna ST70 to Dual-differential EL34 triode amp project
  68. Tube Signal to Noise Ratio / Dynamic Range
  69. fluctating bias
  70. Just tried a Wire Wound pot for volume.
  71. LED's in the cathode..
  72. Dr. Arthur Loesch
  73. Counterpoint SA-220 mods
  74. Broskie P-P Bridged Output Stage
  75. Would a member fluent in technical German please have a look at this link?
  76. Damaged tube? EL84
  77. Heathkit AA-161 EL84/6BQ5 PP mono integrated amp mod
  78. vk-2100 mod question please
  79. Heater supply
  80. 6111/6n16b - linestage noise problem
  81. OPT specs
  82. Re: Tube Line gain stage with pcc88 or ecc82
  83. Knight-kit KA-55
  84. Can I delay part of a B supply this way?
  85. Tube Preamp turn on circuit
  86. SE GM-70 for 700-800 euro?
  87. filter cap markings
  88. tube buffer noise cancellation
  89. PSUD 2
  90. Bypassing filter caps with Smaller caps
  91. balancing resister for series capacitor in a power supply
  92. Yaqin MC-100b- TJ Full Music 6sn7
  93. Forgive me for I have sinned. Help with Volume Pot!
  94. Help with diagnoses for leak 20 PLEASE
  95. Suggested Circuit Changes to use EM80 in place of 6E2 Eye
  96. Fred Nachbaur SET amp: input capacitor
  97. Heathkit scu 1 and knight kn924 needed schematics
  98. Journey to the centre of a tube..
  99. RIP Dr Jim Marshall
  100. some questions about an ECL82 SE amp
  101. Heathkit Sine/Square wave Generator Manual needed!
  102. SRPP Signal Output Capacitors
  103. simple se input impedance
  104. Kt120 screen current
  105. New or used output xformers to play around with?
  106. Magnavox amp
  107. Help hooking up panel ammeter for bias adjust
  108. opt A-440
  109. OTL Headphone amplifier with Tube ED8000
  110. NJ7P Gone?
  111. MYSTERY METAL TUBES B-1532
  112. noisy tubes
  113. Old amp hum repair
  114. Traveling with DIY Kit in USA-Airport Security Question
  115. Hammond 1650P vs 1650N For EL34 PP
  116. Calibrate a Hickok 6000?
  117. Blown Output Tubes
  118. Kriesler Radiogram refurbishment questions
  119. 6P15P socket connection
  120. Revision 2. Balanced
  121. 6V6 schematic
  122. 6h23N test setting?
  123. 12AH7GT
  124. TUBE Tape Head record / playback amp....
  125. Strange couple comportament 6L6GC RCA black plates.
  126. Reduce Output Volume
  127. Differential Amp CCS Tail SVCS Plate - Noise Issues
  128. Triode curves for EL/PL519
  129. Is that a SRPP circuit with 6SN7?
  130. KT33 Push Pull
  131. Rogers Cadet III Integrated Amp Capacitor Values help
  132. 2a3 alternative after NOS burning
  133. 6SN7 SRPP - oscillating dc offset
  134. Hickok TV-2 'percent quality'
  135. Another Tube I/V converter/preamp for balanced DACs with SE output:build thread
  136. Aikido LV 48V ECC99 or 6N6p
  137. Project: Ultra Small 6C33 / Hybrid Stereo Headphone Amplifier
  138. Back to the tubes
  139. Any use for these PAECO transformer?
  140. Video lectures on tube amplifier design
  141. Millett PP or Allen Wright's PP-2c or?
  142. Magnavox 8608-10
  143. Time relay
  144. Help with Music Angel XD800MKIII mods!?
  145. Little Dot MKIII ??????
  146. Cathode follower wideband amplifier
  147. Wrong base ???
  148. My first DIY schematic... need eagle eyes.!
  149. Stubborn Noise/Oscillation - Another Call for Help
  150. help with power tranny
  151. Tube Amp Repair - SE Michigan
  152. ST 70 Power on!
  153. given choice of low screen voltage or low bias which sounds better or is it equal
  154. How many various OEM brands come from Shuguang?
  155. Bye for now! :)
  156. general power tube output impedance chart?
  157. Should I ground my ST 70?
  158. What is the biggest 300B tube? (Dimension)
  159. 6N16 Valve break-in time
  160. Mystery Amp.
  161. valves tungsten filament
  162. Musical Machine (triode PP EL34) question(s)
  163. M100 Output Tube Problem!
  164. Need to replace the power switch on an EAR 859
  165. Eico pentode vs triode VA
  166. gold grid 5881 - was I had?
  167. DN2540 CCS questions
  168. Operating point for pp KT88
  169. Low THD of Opt Cathode feedback
  170. No bias in S-5 12K, 8L, 16L, etc?
  171. Wanted...broken Golden Tube Audio SE-40
  172. Precise 116 Data Needed
  173. Can you bi-wire using two different taps
  174. Transient Responce of Williamson Amp build
  175. Tantalum caps in the filament supply?
  176. Assistance needed in reconstructing a Golden Tube Audio SE-40
  177. interesting power tube comparison chart
  178. 833A and 3-500Z Circuits
  179. Pilot SA-260 amp and Fischer 400C advice
  180. Long tailed pair phase inverter issues
  181. advice on changing bridge rectifier
  182. 21st Century Maida Regulator
  183. 6CA7 UL Push Pull Amp Design
  184. Tube recommendations anyone?
  185. WE 2C51 Date codes
  186. T500-1 - any ideas?
  187. hybrid power amp and more questions
  188. Yaqin MC-100B - not as powerful as advertised, but still a good value.
  189. 6CB5 AMP BUILD.
  190. ABB France SE OPT??
  191. heater wiring
  192. Audioromy FU29 improvement and upgrades?
  193. Need VFD display filament driver
  194. Power Transformer Limitations
  195. Yaqin 100b channel imbalance
  196. Grid stoppers in class AB2 push-pull arrangenets?
  197. Glass bead inside of KT88
  198. Find tube tester!
  199. mono block amps with 2 x 833C overkill ? even possible to DIY?
  200. happiness is a box of 6550 NOS tubes
  201. Taming the 83
  202. 6550 tube bias characters
  203. Tube Amp Squeel
  204. Bias help Music Angel L$, EL84
  205. Stubborn Oscillation
  206. Moderm "high watt" resistors seem too small
  207. Thyratron based emergency switch?
  208. vT4C.com out of business....
  209. Maggie 8802 6V6
  210. Need Counterpoint SA-3 Board Photo
  211. Diodes in a Graetz Hybrid
  212. Tube Noob with a few questions
  213. KT88 Push Pull Idea... Questions
  214. Superior Instruments tv11 restore question?
  215. Superior Instruments tv11 restore question?
  216. Frequency Response of Output Tubes
  217. symptom of a dying (gain) tube
  218. Grounding in monoblock amps
  219. Seeking 6ME5 data and connection diagram
  220. 12BK5 UL tracing gone boosted triode?
  221. Difference between OPT
  222. Tweaking PP AMP Suggestions Please
  223. DC coupled Sand 'n Glass with Current Feedback
  224. Yaqin 100B fire and spares
  225. Pls help with a preamp
  226. Questions about Aikdo all in one octal
  227. Did I get used to my amp's sound?
  228. Michaelson and Austin TVA1 revB
  229. Joy of birth - a new preamp brought to the world
  230. 5U4G
  231. 6N6P best musicality? Help with modes.
  232. Identifying this capacitor in my Cayin TA-30 amp
  233. GU50 Push-Pull version1
  234. Common mode feedback
  235. Stuck with repair ;(
  236. active hum cancellation. PCB idea?
  237. Why this huge cap is so light?
  238. OPT performance
  239. Capacitor WVDC. is higher really better?
  240. Tung Sol ECC803S reissue - thumbs down
  241. Biasing Marshall 9200
  242. In a search for a 6CG7 line stage schematic
  243. Output stage for a Mono FM tube tuner
  244. Want to use El Cheapo P.I. for Scott LK72 rebuild
  245. Ansar caps
  246. TO220 isolation kits breakdown
  247. Schematic for Sony TC-200 tape unit
  248. HV power supply with serial chokes
  249. no logo on tube
  250. Tango XE-20-600S SE OPT for preamp ?

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