Sansui 881 Vintage Receiver Hum Fix

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Fixing the remaining 100Hz mains hum issues the 1974 vintage Sansui 881 Receiver had. Replacing the main filter capacitors and renewing some ground connections.

Part 1 (Restoration of this receiver) is here: https://youtu.be/AG0GsYSAcfE

Here's the tutorial for properly fixing the common hum issues caused by design flaws in some of the 881 receivers (there are different versions of the PCB it seems): http://conradhoffman.com/Sansui_881_mods.htm

The capacitors I used are Mundorf Mlytic 10000uF 63V.

The tracks used for the soldering/timelapse portions of the video and testing the amp were kindly provided by Focus 10 aka Øystein Hansen. Thank you! Check out more of his work here: https://soundcloud.com/user-993847645

Focus 10's tune "8-bit wannabe" is now also available as a single from CDBaby/iTunes/Spotify: https://store.cdbaby.com/cd/focus101

If you find this video helpful and/or entertaining please like, share, subscribe and/or consider a donation!

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Tags:
Sansui
881
Vintage
Receiver
Restoration
Bias
Idling Current
DC Offset
Adjustment
Contact Cleaner
Repair
Hum
Capacitors
Audio
Hifi
Amplifier
Bipolar
Seventies
Aluminum
Aluminium
Mundorf
Mlytic
Farad
Fix
Issues
Mains
100Hz
50Hz
120Hz
60Hz