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  1. Best "Vintage" Stereo Pres that SoftClip and lotsa Harmonics
  2. SE with PP OPT's?
  3. 12ax7/12AT7 Recommendations
  4. HELP: Eimac 75TL amp high frequency roll off
  5. unison reserch s8, let's build it!
  6. Where do super high end companies get their transformers?
  7. Tube Tester Panel Meter
  8. Attic find AMP
  9. Help getting Imax and Eb approximations for a push-pull amp
  10. Is this amp OK to buy, or is this a problem?
  11. Swirling Harmonics, can it be described
  12. Line stage with u-follower and nfb
  13. Newbie looking for help, pre-out to tube amp.
  14. Unison research integrated ampliphier schematics
  15. FET CCS anode load and RFI/oscillation.
  16. Old schematic
  17. Newbie Looking for Replacement OPTS Motorola Console Amp
  18. Merlyn- May AudioXpress
  19. How to clean tubes?
  20. does the 3A5 have the stones to drive a 2A3?
  21. New amp: 13DE7 SE hybrid
  22. My amp is motorboating, improve it with b+ regulator ?
  23. Can you identify these amps?
  24. Sowter SA01 - anyone used it ?
  25. Mikael‑Abdellah‑SE‑KT88 Bias & Voltage readings Help?
  26. Resistors and combinations
  27. thr light in pcl82
  28. Bogen L330 - Worth restoring?
  29. Supro model 24 amp transformers
  30. Those Magnificent Television Tubes
  31. Demagnetizing OPT?
  32. Real DIY fun hybrid testing.
  33. Extreme hum in EQ output
  34. 46 triode-strapped DHT spice model
  35. SET output impedance vs speaker impedance
  36. Help with layout of tube preamp
  37. eico HF-65
  38. Wirewound bias pot problem.
  39. Driver for Telefunken RS242 in class A2
  40. Help on my signal generator
  41. another tube fact or fallacy
  42. Gap in Transformer Lams - OCD Check
  43. how to test...
  44. chinese tube amp
  45. tube/valve pc-80
  46. GM-70 All done
  47. Peavey 60/60 classic series schematic
  48. preamp for reciever?
  49. Designing a Tube Rectifier Circuit
  50. Bogen RP40A transformers....what to build with them?
  51. Harmony guitar amp restoration questions
  52. Heads Up for "El Cheapo" Builders
  53. replacing kt66 valves
  54. Help with power transformer identification
  55. 6-8x el84 Per channel
  56. To vary a signal pentode to triode in stages
  57. I have 2 choices for resistive load, need opinions.
  58. Tesla PCC88 7DJ8 dual triode - Help Needed.
  59. PP6550
  60. LT1083 interesting startup problem
  61. ECC33 Driver Stage
  62. Hiraga's Improved Concertina Phase Splitter
  63. 274B a direct replacement for 5AR4/GZ34?
  64. Help power up akai M8 amps
  65. Sonic Frontiers Power 3 Help!
  66. ImPasse Preamp now online
  67. Power supply for tube preamplifier with PCC88
  68. Don't know where to start...
  69. DIY noob
  70. 300B amp cathode bypass
  71. Amp hum with Preamp off
  72. First Project with these tubes
  73. 7189a socket rewiring
  74. Hybrid rectifiers in PSUD2
  75. Feedback / experience wanted on building the Audio note L4 Integrated EL34 PP Amp Kit
  76. About 6AS7BTL Amp
  77. Output Stage Protection Circuit
  78. Silly basic layout question - AC heaters
  79. heater voltage variation for special tubes
  80. Want to build a 807 Vixen.. Looking for help.
  81. Connecting Speakers to Yaqin 10L
  82. Gyrator Filter
  83. 6ab4 tube socket mounting
  84. Any Moto heads? Need OT advice please
  85. Did I break my tube? (new blue glow)
  86. I need help with ccs based LTP
  87. 4033L- rare triode tube.
  88. Single tube linestage schematic wanted: 8CG7
  89. Tetra Sans PS
  90. Tone controls
  91. Vintage Heathkit Electronic Switch as soundcard interface
  92. K-12M extra caps??
  93. Looking for Tube Amp Kit Recommendations
  94. magnatone 280 schematic
  95. high voltage after cap. change
  96. My first tube amp
  97. Recommendations for 6888 triode operating point?
  98. Mullard 12AX7 part uniformity
  99. 6n15n-EB confusion
  100. Noob Question: Phono Preamp
  101. Transformer data required P782
  102. Snubbers on Power Transformer Secondaries
  103. CCS for 6V6 PP amp
  104. screen voltage for triode strapped pentode
  105. New Driver
  106. purpose and value importance of resistor
  107. Values for Vintage Amp's & Preamp's Paragon 12(70's) & More
  108. Help with amp please.
  109. Another Discrete Current Source
  110. 834 Triode amp
  111. Determing the reason for mystery? cap in schematic.
  112. Dyna ST70 to Dual-differential EL34 triode amp project
  113. Tube Signal to Noise Ratio / Dynamic Range
  114. fluctating bias
  115. Just tried a Wire Wound pot for volume.
  116. LED's in the cathode..
  117. Dr. Arthur Loesch
  118. Counterpoint SA-220 mods
  119. Broskie P-P Bridged Output Stage
  120. Would a member fluent in technical German please have a look at this link?
  121. Damaged tube? EL84
  122. Heathkit AA-161 EL84/6BQ5 PP mono integrated amp mod
  123. vk-2100 mod question please
  124. Heater supply
  125. 6111/6n16b - linestage noise problem
  126. OPT specs
  127. Re: Tube Line gain stage with pcc88 or ecc82
  128. Knight-kit KA-55
  129. Can I delay part of a B supply this way?
  130. Tube Preamp turn on circuit
  131. SE GM-70 for 700-800 euro?
  132. filter cap markings
  133. tube buffer noise cancellation
  134. PSUD 2
  135. Bypassing filter caps with Smaller caps
  136. balancing resister for series capacitor in a power supply
  137. Yaqin MC-100b- TJ Full Music 6sn7
  138. Forgive me for I have sinned. Help with Volume Pot!
  139. Help with diagnoses for leak 20 PLEASE
  140. Suggested Circuit Changes to use EM80 in place of 6E2 Eye
  141. Fred Nachbaur SET amp: input capacitor
  142. Heathkit scu 1 and knight kn924 needed schematics
  143. Journey to the centre of a tube..
  144. RIP Dr Jim Marshall
  145. some questions about an ECL82 SE amp
  146. Heathkit Sine/Square wave Generator Manual needed!
  147. SRPP Signal Output Capacitors
  148. simple se input impedance
  149. Kt120 screen current
  150. New or used output xformers to play around with?
  151. Magnavox amp
  152. Help hooking up panel ammeter for bias adjust
  153. opt A-440
  154. OTL Headphone amplifier with Tube ED8000
  155. NJ7P Gone?
  156. MYSTERY METAL TUBES B-1532
  157. noisy tubes
  158. Old amp hum repair
  159. Traveling with DIY Kit in USA-Airport Security Question
  160. Hammond 1650P vs 1650N For EL34 PP
  161. Calibrate a Hickok 6000?
  162. Blown Output Tubes
  163. Kriesler Radiogram refurbishment questions
  164. 6P15P socket connection
  165. Revision 2. Balanced
  166. 6V6 schematic
  167. 6h23N test setting?
  168. 12AH7GT
  169. TUBE Tape Head record / playback amp....
  170. Strange couple comportament 6L6GC RCA black plates.
  171. Reduce Output Volume
  172. Differential Amp CCS Tail SVCS Plate - Noise Issues
  173. Triode curves for EL/PL519
  174. Is that a SRPP circuit with 6SN7?
  175. KT33 Push Pull
  176. Rogers Cadet III Integrated Amp Capacitor Values help
  177. 2a3 alternative after NOS burning
  178. 6SN7 SRPP - oscillating dc offset
  179. Hickok TV-2 'percent quality'
  180. Another Tube I/V converter/preamp for balanced DACs with SE output:build thread
  181. Aikido LV 48V ECC99 or 6N6p
  182. Project: Ultra Small 6C33 / Hybrid Stereo Headphone Amplifier
  183. Back to the tubes
  184. Any use for these PAECO transformer?
  185. Video lectures on tube amplifier design
  186. Millett PP or Allen Wright's PP-2c or?
  187. Magnavox 8608-10
  188. Time relay
  189. Help with Music Angel XD800MKIII mods!?
  190. Little Dot MKIII ??????
  191. Cathode follower wideband amplifier
  192. Wrong base ???
  193. My first DIY schematic... need eagle eyes.!
  194. Stubborn Noise/Oscillation - Another Call for Help
  195. help with power tranny
  196. Tube Amp Repair - SE Michigan
  197. ST 70 Power on!
  198. given choice of low screen voltage or low bias which sounds better or is it equal
  199. How many various OEM brands come from Shuguang?
  200. Bye for now! :)
  201. general power tube output impedance chart?
  202. Should I ground my ST 70?
  203. What is the biggest 300B tube? (Dimension)
  204. 6N16 Valve break-in time
  205. Mystery Amp.
  206. valves tungsten filament
  207. Musical Machine (triode PP EL34) question(s)
  208. M100 Output Tube Problem!
  209. Need to replace the power switch on an EAR 859
  210. Eico pentode vs triode VA
  211. gold grid 5881 - was I had?
  212. DN2540 CCS questions
  213. Operating point for pp KT88
  214. Low THD of Opt Cathode feedback
  215. No bias in S-5 12K, 8L, 16L, etc?
  216. Wanted...broken Golden Tube Audio SE-40
  217. Precise 116 Data Needed
  218. Can you bi-wire using two different taps
  219. Transient Responce of Williamson Amp build
  220. Tantalum caps in the filament supply?
  221. Assistance needed in reconstructing a Golden Tube Audio SE-40
  222. interesting power tube comparison chart
  223. 833A and 3-500Z Circuits
  224. Pilot SA-260 amp and Fischer 400C advice
  225. Long tailed pair phase inverter issues
  226. advice on changing bridge rectifier
  227. 21st Century Maida Regulator
  228. 6CA7 UL Push Pull Amp Design
  229. Tube recommendations anyone?
  230. WE 2C51 Date codes
  231. T500-1 - any ideas?
  232. hybrid power amp and more questions
  233. Yaqin MC-100B - not as powerful as advertised, but still a good value.
  234. 6CB5 AMP BUILD.
  235. ABB France SE OPT??
  236. heater wiring
  237. Audioromy FU29 improvement and upgrades?
  238. Need VFD display filament driver
  239. Power Transformer Limitations
  240. Yaqin 100b channel imbalance
  241. Grid stoppers in class AB2 push-pull arrangenets?
  242. Glass bead inside of KT88
  243. Find tube tester!
  244. mono block amps with 2 x 833C overkill ? even possible to DIY?
  245. happiness is a box of 6550 NOS tubes
  246. Taming the 83
  247. 6550 tube bias characters
  248. Tube Amp Squeel
  249. Bias help Music Angel L$, EL84
  250. Stubborn Oscillation

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