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  1. Is this amp OK to buy, or is this a problem?
  2. Swirling Harmonics, can it be described
  3. Line stage with u-follower and nfb
  4. Newbie looking for help, pre-out to tube amp.
  5. Unison research integrated ampliphier schematics
  6. FET CCS anode load and RFI/oscillation.
  7. Old schematic
  8. Newbie Looking for Replacement OPTS Motorola Console Amp
  9. Merlyn- May AudioXpress
  10. How to clean tubes?
  11. does the 3A5 have the stones to drive a 2A3?
  12. New amp: 13DE7 SE hybrid
  13. My amp is motorboating, improve it with b+ regulator ?
  14. Can you identify these amps?
  15. Sowter SA01 - anyone used it ?
  16. Mikael‑Abdellah‑SE‑KT88 Bias & Voltage readings Help?
  17. Resistors and combinations
  18. thr light in pcl82
  19. Bogen L330 - Worth restoring?
  20. Supro model 24 amp transformers
  21. Those Magnificent Television Tubes
  22. Demagnetizing OPT?
  23. Real DIY fun hybrid testing.
  24. Extreme hum in EQ output
  25. 46 triode-strapped DHT spice model
  26. SET output impedance vs speaker impedance
  27. Help with layout of tube preamp
  28. eico HF-65
  29. Wirewound bias pot problem.
  30. Driver for Telefunken RS242 in class A2
  31. Help on my signal generator
  32. another tube fact or fallacy
  33. Gap in Transformer Lams - OCD Check
  34. how to test...
  35. chinese tube amp
  36. tube/valve pc-80
  37. GM-70 All done
  38. Peavey 60/60 classic series schematic
  39. preamp for reciever?
  40. Designing a Tube Rectifier Circuit
  41. Bogen RP40A transformers....what to build with them?
  42. Harmony guitar amp restoration questions
  43. Heads Up for "El Cheapo" Builders
  44. replacing kt66 valves
  45. Help with power transformer identification
  46. 6-8x el84 Per channel
  47. To vary a signal pentode to triode in stages
  48. I have 2 choices for resistive load, need opinions.
  49. Tesla PCC88 7DJ8 dual triode - Help Needed.
  50. PP6550
  51. LT1083 interesting startup problem
  52. ECC33 Driver Stage
  53. Hiraga's Improved Concertina Phase Splitter
  54. 274B a direct replacement for 5AR4/GZ34?
  55. Help power up akai M8 amps
  56. Sonic Frontiers Power 3 Help!
  57. ImPasse Preamp now online
  58. Power supply for tube preamplifier with PCC88
  59. Don't know where to start...
  60. DIY noob
  61. 300B amp cathode bypass
  62. Amp hum with Preamp off
  63. First Project with these tubes
  64. 7189a socket rewiring
  65. Hybrid rectifiers in PSUD2
  66. Feedback / experience wanted on building the Audio note L4 Integrated EL34 PP Amp Kit
  67. About 6AS7BTL Amp
  68. Output Stage Protection Circuit
  69. Silly basic layout question - AC heaters
  70. heater voltage variation for special tubes
  71. Want to build a 807 Vixen.. Looking for help.
  72. Connecting Speakers to Yaqin 10L
  73. Gyrator Filter
  74. 6ab4 tube socket mounting
  75. Any Moto heads? Need OT advice please
  76. Did I break my tube? (new blue glow)
  77. I need help with ccs based LTP
  78. 4033L- rare triode tube.
  79. Single tube linestage schematic wanted: 8CG7
  80. Tetra Sans PS
  81. Tone controls
  82. Vintage Heathkit Electronic Switch as soundcard interface
  83. K-12M extra caps??
  84. Looking for Tube Amp Kit Recommendations
  85. magnatone 280 schematic
  86. high voltage after cap. change
  87. My first tube amp
  88. Recommendations for 6888 triode operating point?
  89. Mullard 12AX7 part uniformity
  90. 6n15n-EB confusion
  91. Noob Question: Phono Preamp
  92. Transformer data required P782
  93. Snubbers on Power Transformer Secondaries
  94. CCS for 6V6 PP amp
  95. screen voltage for triode strapped pentode
  96. New Driver
  97. purpose and value importance of resistor
  98. Values for Vintage Amp's & Preamp's Paragon 12(70's) & More
  99. Help with amp please.
  100. Another Discrete Current Source
  101. 834 Triode amp
  102. Determing the reason for mystery? cap in schematic.
  103. Dyna ST70 to Dual-differential EL34 triode amp project
  104. Tube Signal to Noise Ratio / Dynamic Range
  105. fluctating bias
  106. Just tried a Wire Wound pot for volume.
  107. LED's in the cathode..
  108. Dr. Arthur Loesch
  109. Counterpoint SA-220 mods
  110. Broskie P-P Bridged Output Stage
  111. Would a member fluent in technical German please have a look at this link?
  112. Damaged tube? EL84
  113. Heathkit AA-161 EL84/6BQ5 PP mono integrated amp mod
  114. vk-2100 mod question please
  115. Heater supply
  116. 6111/6n16b - linestage noise problem
  117. OPT specs
  118. Re: Tube Line gain stage with pcc88 or ecc82
  119. Knight-kit KA-55
  120. Can I delay part of a B supply this way?
  121. Tube Preamp turn on circuit
  122. SE GM-70 for 700-800 euro?
  123. filter cap markings
  124. tube buffer noise cancellation
  125. PSUD 2
  126. Bypassing filter caps with Smaller caps
  127. balancing resister for series capacitor in a power supply
  128. Yaqin MC-100b- TJ Full Music 6sn7
  129. Forgive me for I have sinned. Help with Volume Pot!
  130. Help with diagnoses for leak 20 PLEASE
  131. Suggested Circuit Changes to use EM80 in place of 6E2 Eye
  132. Fred Nachbaur SET amp: input capacitor
  133. Heathkit scu 1 and knight kn924 needed schematics
  134. Journey to the centre of a tube..
  135. RIP Dr Jim Marshall
  136. some questions about an ECL82 SE amp
  137. Heathkit Sine/Square wave Generator Manual needed!
  138. SRPP Signal Output Capacitors
  139. simple se input impedance
  140. Kt120 screen current
  141. New or used output xformers to play around with?
  142. Magnavox amp
  143. Help hooking up panel ammeter for bias adjust
  144. opt A-440
  145. OTL Headphone amplifier with Tube ED8000
  146. NJ7P Gone?
  147. MYSTERY METAL TUBES B-1532
  148. noisy tubes
  149. Old amp hum repair
  150. Traveling with DIY Kit in USA-Airport Security Question
  151. Hammond 1650P vs 1650N For EL34 PP
  152. Calibrate a Hickok 6000?
  153. Blown Output Tubes
  154. Kriesler Radiogram refurbishment questions
  155. 6P15P socket connection
  156. Revision 2. Balanced
  157. 6V6 schematic
  158. 6h23N test setting?
  159. 12AH7GT
  160. TUBE Tape Head record / playback amp....
  161. Strange couple comportament 6L6GC RCA black plates.
  162. Reduce Output Volume
  163. Differential Amp CCS Tail SVCS Plate - Noise Issues
  164. Triode curves for EL/PL519
  165. Is that a SRPP circuit with 6SN7?
  166. KT33 Push Pull
  167. Rogers Cadet III Integrated Amp Capacitor Values help
  168. 2a3 alternative after NOS burning
  169. 6SN7 SRPP - oscillating dc offset
  170. Hickok TV-2 'percent quality'
  171. Another Tube I/V converter/preamp for balanced DACs with SE output:build thread
  172. Aikido LV 48V ECC99 or 6N6p
  173. Project: Ultra Small 6C33 / Hybrid Stereo Headphone Amplifier
  174. Back to the tubes
  175. Any use for these PAECO transformer?
  176. Video lectures on tube amplifier design
  177. Millett PP or Allen Wright's PP-2c or?
  178. Magnavox 8608-10
  179. Time relay
  180. Help with Music Angel XD800MKIII mods!?
  181. Little Dot MKIII ??????
  182. Cathode follower wideband amplifier
  183. Wrong base ???
  184. My first DIY schematic... need eagle eyes.!
  185. Stubborn Noise/Oscillation - Another Call for Help
  186. help with power tranny
  187. Tube Amp Repair - SE Michigan
  188. ST 70 Power on!
  189. given choice of low screen voltage or low bias which sounds better or is it equal
  190. How many various OEM brands come from Shuguang?
  191. Bye for now! :)
  192. general power tube output impedance chart?
  193. Should I ground my ST 70?
  194. What is the biggest 300B tube? (Dimension)
  195. 6N16 Valve break-in time
  196. Mystery Amp.
  197. valves tungsten filament
  198. Musical Machine (triode PP EL34) question(s)
  199. M100 Output Tube Problem!
  200. Need to replace the power switch on an EAR 859
  201. Eico pentode vs triode VA
  202. gold grid 5881 - was I had?
  203. DN2540 CCS questions
  204. Operating point for pp KT88
  205. Low THD of Opt Cathode feedback
  206. No bias in S-5 12K, 8L, 16L, etc?
  207. Wanted...broken Golden Tube Audio SE-40
  208. Precise 116 Data Needed
  209. Can you bi-wire using two different taps
  210. Transient Responce of Williamson Amp build
  211. Tantalum caps in the filament supply?
  212. Assistance needed in reconstructing a Golden Tube Audio SE-40
  213. interesting power tube comparison chart
  214. 833A and 3-500Z Circuits
  215. Pilot SA-260 amp and Fischer 400C advice
  216. Long tailed pair phase inverter issues
  217. advice on changing bridge rectifier
  218. 21st Century Maida Regulator
  219. 6CA7 UL Push Pull Amp Design
  220. Tube recommendations anyone?
  221. WE 2C51 Date codes
  222. T500-1 - any ideas?
  223. hybrid power amp and more questions
  224. Yaqin MC-100B - not as powerful as advertised, but still a good value.
  225. 6CB5 AMP BUILD.
  226. ABB France SE OPT??
  227. heater wiring
  228. Audioromy FU29 improvement and upgrades?
  229. Need VFD display filament driver
  230. Power Transformer Limitations
  231. Yaqin 100b channel imbalance
  232. Grid stoppers in class AB2 push-pull arrangenets?
  233. Glass bead inside of KT88
  234. Find tube tester!
  235. mono block amps with 2 x 833C overkill ? even possible to DIY?
  236. happiness is a box of 6550 NOS tubes
  237. Taming the 83
  238. 6550 tube bias characters
  239. Tube Amp Squeel
  240. Bias help Music Angel L$, EL84
  241. Stubborn Oscillation
  242. Moderm "high watt" resistors seem too small
  243. Thyratron based emergency switch?
  244. vT4C.com out of business....
  245. Maggie 8802 6V6
  246. Need Counterpoint SA-3 Board Photo
  247. Diodes in a Graetz Hybrid
  248. Tube Noob with a few questions
  249. KT88 Push Pull Idea... Questions
  250. Superior Instruments tv11 restore question?

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