Sl-db27u technics form the late 80's Ground Wire

SOURCE: Where is the ground wire connected to on the Technics SL-BD27?

You will more than likely need to wire it up from the inside of the unit, unfortunately. Parts for this model are discontinued. You can also try an iPod cable. As the size is a 1/8" plug - same as an iPod cable, then just cut the other end, and ground to your receiver.

- TERMiNAL OPTiC
TWEAK AV REPAIR

SOURCE: Technics SL 1210 feedback/grounding problem.

Hi

It is most likely you have an acoutsic coupling to the decks from the work surface, mixer, or a roadcase. If any part of the body of the deck is touching anything else, then you will get rumble and acoustic feedback problems. the deck should rest evenly on its own 4 legs, clear of anthing else. Technics sl1200 series decks are the best in the world for acoustic isolation. There will always be some feedback from your decks to speakers. However, only with a really high powered system should give you problems, DJ booths are sometimes suspended from the roof just to eliminate this rumble.
A 1/3 octave EQ (31band) can also be effective at reducing feedback.

regards
robotek

SOURCE: Ground wire disconnected on my technics SL-1200 M3D

to any metal part of the frame

SOURCE: Technics SL-BD22 ground wire does not reduce hum. Any solutions?

I have found out that the female phono plugs on the turntable are sensative and have to have a solid connection and often adjusted from time to time to eliminate the 60 cycle hum.