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  1. Germanium Amp
  2. Using a Caddock MP821 as an emitter resistor.
  3. Improving amplifier input stage
  4. Advantages of flat LF speaker impedance for amps
  5. Issue with TA1600
  6. Infinity OVTR 1 subwoofer amp
  7. Why do AC supplied systems perform better?
  8. Esoter Evoque Pure Amplifier
  9. 2SC2922 / 2SA1216 hfe rank mismatch
  10. fuse blow
  11. C-Audio RA3000 Blowing fuses
  12. a new low noise, HV Op Amp !
  13. Electrohome C-400
  14. Decoupling for battery based opamp circuits
  15. about schemes H/K citation 24 and Braun Atelier PA 4 (/ 2)
  16. Simple Feed Forward for Power Amp
  17. Emotive mini-X a-100 vs Dayton Audio APA150
  18. Newbie recap project seeks advice..
  19. Adcom GFA-5800 amplifier cooling fans
  20. Hafler 9505 switch needed
  21. Amplificador SUBZERO
  22. Son of Ampzilla rebuilt
  23. upgrading tivoli model one
  24. BIG transistors
  25. Another 80's british amp thread
  26. Yamaha M50 fixing or rebuild
  27. 250-400watt audio amplifier
  28. Parasound A31
  29. Question reg. Sansui Au-D5 mod
  30. Simple Universal Speaker Delay Using A Triac
  31. yamaha emx640 darlington amp repair
  32. The best Circuit of MJ11032,MJ11033 searching!
  33. Pioneer VSX-D557 Overload problem
  34. Soundstandard ES200 schematics anyone ??
  35. Playmaster Series 200 Circuit
  36. DC offset adj in JE990
  37. Korting Transmare A500 - vintage German amp, with issues!
  38. Tekko draws something from his head
  39. Vintage Toshiba 330 power amp problem, possible repair?
  40. Complementary Power MOSFETs
  41. Old class A design with 2SK146 dual JFET
  42. Balanced NoGNFB With Cross-Linked Input Stage
  43. MC2505 problem
  44. Bridging two 300W in 8 ohm amplifier to drive 1200W in 8 ohm
  45. Can a very simple class A amp produce great sound?
  46. you gotta be kidding !
  47. How to find the transfer function of this volume control?
  48. NAD C370 - red light
  49. Marantz SR1040 no output
  50. Mosfet question ( help needed )
  51. Trouble with Denon PMA-520 bias adjustment
  52. What is the importance of IQ in a common emitter stage?
  53. what is the role of the 68pf and 2200pf cap in Hiraga Super class A 30W
  54. Zero FeedBack Amp
  55. Motorola Solid State
  56. Is it worth modding a Marantz PM66SE
  57. Cyrus 3 2nd stage fault.. HELP!
  58. Carver CM-1090 pre/pro help?
  59. Krell KSA 50 clone power supply.
  60. Pioneer receiver mods
  61. Are ground planes in audio pcbs legit?
  62. Radio
  63. Suggestions for output pairs
  64. First amp I ever built - An excellent simple class A amp for beginners
  65. Does anyone know.......
  66. bow technology is still live?
  67. Esoteric Asr schematic
  68. I need help getting started with an Onkyo M-501
  69. High Power, High Fidelity Lateral MOSFET Power Amplifier
  70. Cheaper way to test power supply stability?
  71. Battery Type for Portable Speakers
  72. high rail voltage chip amps?
  73. class A output stage without feedback for a DAC?
  74. Need help hooking up Ashly P70-400
  75. Surprising polycarbonate caps
  76. Cordell OF THE Amplifier
  77. help changing the crossover setting of my class A/B subwoofer plate amp
  78. catfet amplifier
  79. Did one sell Krell amp after building LM4702?
  80. is current in speaker load to be anyway closer to psu current ratings?
  81. Krell KRC-2 service-manual?
  82. Sound project Module
  83. Rega Brio-R design
  84. Scratchy sound coming from speaker
  85. Dx Zim (Zimmer) SMPS will be developed to release
  86. Grounding scheme and loop breaker, need advice..
  87. Sony TA-FE230 Left Channel Weak
  88. I need pcb for this scheme
  89. How to repair and diagnose amp problem?
  90. WAV File Reproduction Sound Project
  91. the Inverting stage
  92. What about car amps?
  93. Audiolab 8000p stopped working.
  94. Ampeg svt 3 pro Power Amp
  95. McIntosh amp smoking
  96. 2 x 15W rms Audio Amp for small speakers
  97. Mickey Mouse PA Amplifiers and Mixers (two brands MM + PAiCE) - Schematics wanted
  98. channel sound loss scott 350R
  99. Need information for MM AP360 Amplifier
  100. Help me please with NAD S300
  101. Arcam AVR-100
  102. Sansui AU-217 issues
  103. Marantz PM44SE power/relay? issues
  104. Rotel RC-1070 Preamp PSU Repair
  105. home wiring is old knob and tube-no ground plug
  106. Should I let unused amps sit or power them up and use them on occasion.
  107. i need LUXMAN L-570 service manual
  108. Luxman 115 preamped into Concept 16.5?
  109. NAD T752 Repair Advice
  110. Goldmund schematics
  111. The Spanish Trio 5700 story
  112. Newbie trying to learn about my GFA-535 internals
  113. Help: A question regarding PCB to PTP?
  114. Converting single-ended signal to balanced causes background noises
  115. LME49830 question
  116. It helps to select best class power amplifier (AB- 40-50 watts)
  117. Transformer for Nytech CA252 Amplifier
  118. Dynaco st120
  119. How good / bad is this amp made?
  120. Efficient Subwoofer Amplifier
  121. Need Help With BUZ901/906 MOSFET Amplifier
  122. Current conveyor
  123. Question on Transistor amplification
  124. Output subs for 2sa1301 & 2sc3280
  125. Technics SA-R 410
  126. Another "ancient" amp
  127. Burnt out transistors - replace with same or something better? Rotel RB-991
  128. Help with Adcom GFA555-II
  129. Sansui ba-5000 Large Cap Removal Help Needed
  130. help to select and correct 400w TDA2030A OR 200WTDA2030
  131. Cambridge Audio A500 & P500
  132. softstart recommendation for 2kva R-core and 1,00,000uf per rail x 2 caps
  133. Alternative buffer topologies
  134. 400 Watt in 8ohms/ 800 watt in 4 Ohms
  135. Until I can afford a digital unit Old Technics??
  136. Yamaha AX 500u schematic, integrated amp
  137. Power rating for short circuit protection in linear voltage regulator
  138. Leach Amp Tests (weird noise)
  139. Amplifier with a sound. How to build for second harmonic.
  140. TCAAS
  141. Pre amp recommendation
  142. what is cy7c6801a pc 645041 and what does it do?
  143. Raising bias on Marantz SR4200 AV Receiver
  144. Will this schematic work ? (2SK2221/2SJ352 only)
  145. Legacy Whisper vs Klipsh Cornwall loading Mark Levinson ML-2
  146. what happens if transistors are not matched? especially output stage..
  147. SOME CLASS H, AB ,PROTECT POWER AMPS
  148. Please help me understand the voltage regulator with external bypass BJT?
  149. Lead size of TO-3 package and where to get insulated jumper wires?
  150. Cross reference 2SD234
  151. about maintenance of amplifiers
  152. Help with this preamp
  153. Input line 120hz on speaker output in class A?
  154. Need help
  155. How to make LME49810 amp 2 ohm stable?
  156. Make Hifi with 3 Triple Sziklai transistors in Simple Class A
  157. 3000w power amp sadaru
  158. Input capacitor 2.2uf Polystyrene or Mundorf Silver/oil?
  159. Negative side Mosfet heating up with mild hissing
  160. Should a 250VA toriodal be blowing a 1A fuse?
  161. The questions about Hi-fi audio for home use.
  162. Denon Output Transistors.
  163. Sansui 9090 help
  164. Diamonds and Pearls
  165. Seeking DC Enlightenment
  166. FETZILLA - The Builders Place
  167. N-Channel JFET sub
  168. Simple 85W amplifier
  169. NAD T753 receiver: No sound
  170. Power Supply and Other Re-capping
  171. Power Supply and Other Re-capping
  172. 100watt mono amp find???
  173. help! noob recapping an amp... really stuck.
  174. Powerbass atm-440.2
  175. uPC1237 too slow
  176. What type of capacitors are these?
  177. +/- 36 Volt Voltageamp with TMC error correction
  178. Sound of Op Amps...
  179. THRESHOLD S-300 UPGRADE
  180. Alternative method load for power testing amps?
  181. THRESHOLD S-300 UPGRADE
  182. alternativ symmetric amp
  183. Has anyone ever had experience with MUSE opamps?
  184. Baking a pcb for removing moisture
  185. Nad 3020e lost some of its volume , distortion
  186. Hafler P3000
  187. Krell KSA-150 Power board Reassamble HELP Please
  188. accurate Output Stage
  189. N-Channel JFET
  190. Musical Fidelity A100 resistors
  191. Help me from JFET
  192. Parts for NAK CA5
  193. Help for Rega biasing value
  194. Replacement transistors, NAIM NAP90
  195. DC Detection Question
  196. Leach driven by DRV134
  197. TO-3 Removal
  198. HOW CAN I CREATE 10% THD ??
  199. Another ESP P3A PCB design thread
  200. joule thief (draw more power from a power supply?)
  201. Found: SAE Series Two Power Switch
  202. Restart search for PS Audio Elite schematic.
  203. NAD 114 switch-on.
  204. Cadsoft eagle package LSK389
  205. gallien-krueger MB150s 120v to 230v conversion?
  206. New modern amp or classic second hand?
  207. Capicator Whine? PPI PC2350
  208. How much big a heatsink has to be?
  209. NAD C326BEE upgrades
  210. Cyrus 2 - removing cover
  211. Idling setting for Yamaha MX-2000 ?
  212. Philips 391 Intergrated Amplifier guts?
  213. 500w mosfet power amp sadaru
  214. Adjusting DC offset issues
  215. New Lineup IDEA - Power Follower/Output stage
  216. PS Audio 100c thump
  217. Just scored a Sanyo DC-8500K, Can its preamp board drive a Matsushita EPC-451C?
  218. Krell KSA 250 - The Mother Clone !!!
  219. AV400 Bias adjust and Transistor burning accidents
  220. how to match the Transistors like toshiba 5200 1943
  221. Power amp right channel running hot.
  222. Class G plate amp problem
  223. ARCAM D290 DEAD - PLEASE HELP
  224. I am having fun..the one is saying bad things is a friend
  225. Increasing the output power of a car amplifier.
  226. PCB for TDA7295
  227. VSP Labs TransMOS
  228. CS800X output amp cicuitry
  229. Heatsink gradients and Vbe
  230. Are these ok for usage in a vas / current source ?
  231. help with Luxman l-200
  232. why do old amps sound is liked by many serious audiophiles even though...
  233. Best suited power mosfets for amplifiers
  234. why do old amps has sleeve on the resistors pins...
  235. A872e Replacement
  236. See any issues with this class A current clip detect circuit?
  237. Effects of emitter resistors in a hifi amp?
  238. Sansui 9090 bias
  239. Replacement For MPSU10/60
  240. Attempting to restore a Pioneer 202 spring reverb
  241. Quad 405 clone parts
  242. Parts quality does matter, yes, but..
  243. Sources for TO220 heatsinks?
  244. line level stereo volume control using one pot?
  245. REPLACE TIP36 + 2N3055 IN TDA2030A
  246. Amp is making loud "boom pop" noises every second or so..
  247. R24 incomplete
  248. Krell KSA-250 low frequency oscillation
  249. Newly built ESP P03 (not 3A) - rail to rail oscillation - suggestions?
  250. Musical Fidelity 3A-X preamplifier

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