G1 power adaptor lead

[John in UK]

Hi there
The power adaptor for my G1 has a plastic lump on the lead at the DC or camera end. I’ve never taken any notice of it until today when I found it had become detached from the lead and was lying open on the floor. I’m guessing that a section of the lead should be coiled up inside it, but what is its function? And is it important?
The camera has given me lots of pleasure, by the way. I especially like the flip-out and twist LCD screen.
John

[rpolitsr]

Welcome to the POTN forums John

My Pro1’s power adaptor has two of them near each end of the cable. In fact it is a ferrite core to filter high frequency interference from the power adaptor and from the camera electronics.

I guess mostly it keeps the equipment under FCC or UL interference regulations, but certainly reduces the presence of electric noise in the circuits (not the sensor noise).

They are two halves that form a ferrite core with a turn of the dc power cable around it. The halves are hold in place by a piece of heat shrinkable plastic tube. If you can not find heat shrink plastic of that diameter, a couple of turns of electric tape will do the job.

I hope the image will help to re-made your ferrite core.

http://sites.google.com/site/rpolitsr/r_polit_7/pictures/miscelanea/ferrite_core_CRW_2938.jpg

[John in UK]

Thanks for the information, Rafael, and the photograph. The item in question is slightly different in my case - there is only space to fit a coil of wire within the core - but the principle is obviously the same. I've noticed that my partner's laptop has one too, but it is in a sealed plastic moulding.
Thanks again, it's obviously nothing to worry about!

[mastertech01]

I would reinstall it just to protect the micro chips within the camera from possible malfunction due to electrical interference including firmware lockups.

[John in UK]

Thanks for your contribution, Mastertech. My research, however, since discovering here what the device is called, leads me to think there's quite a bit of confusion about what it is there for. I'm content to just refit it to be on the safe side.