Humming...

I'll check the cable tv wire in the evening itself and yes, many of the components have 3pin plugs, so i guess the systems are earthed afterall.

thanks!

Thanks man. Looks like an informative page, will go through it in detail later today. Hopefully I'll get some way to fix the damn humm.

Cheers!

I am also having a similar problem when i connect the headphone out of the laptop (hp pavilion dv5120us) to the aux-in of my amplifier. However connecting my dell latitude 420 has no issues.

Amp: NADC352
Cables: Monster RCA
Converter: RCA - EP

Common grounding between the amp and laptop.

Does impedance mismatches lead to hums?

Thanks,
Saikat.

Well Saikat, since the dell is working fine, the problem seems to be with the headphone out of the HP. However, the only way to find out is to be just patient and try out every component in the system and nail the one that creates the humm.

In my case - with the help of sunill, dinyaar, awedeophile and mukund - I just kept checking every single component connected to my receiver. At the end, all I had to do was to just change the power strip I was using at that time!

All the best.

Thanks unleash_me. I just figured out the problem. There is a micro-switch inside the earphone plug of the hp. Trying to be extra careful, I had just assumed that the jack was in all the way while it was merely stopping at the switch.

Shall remember to push it in a bit more the next time..[no puns intended..

-Saikat

Hi Saikat/Unleash,
Glad that ur problems are solved saikat. Actually these locally made power strips which claim to have a surge protect/built in fuse etc etc are notorious for inducing hum and hence if u must use a power strip get one made. As i mentioned earlier somewhere my tapedeck always had a hum when used through a power strip which vanished when connected directly to the wall outlets. Finally i made a power strip with anchor switches/anchor plastic box/finolex 2.5 sq.mm wire for looping/ finolex 4 sq.mm 3 core cable. Worked well till i got my wiring re done.
Regards

Dinyaar:

For a long time I have also been using power strips that were made by my electrician under my watchful eyes. I have used Finolex cables as well as Anchor sockets. These have worked well with Indian plugs. I have had issues with imported plugs such as those on mobile chargers, 2-in-1s etc, that do not sit properly. Though I have used the best adapters from Mx. I have burnt a items.

I recently came across a well made power strip by some company called Oxygen. These loog good and have 4 three pins sockets and 2 two ping sockets. They accept Indian, UK, US and other plugs. Best is all plugs are tight and site well removing my phobia with sparks. I have started slowing using these for all my electronic equipment. These strips come with a fuse and a surge protector.

Here is a photo for those who want to use them. They don't have any company or address, and you have to look for the product with the way the name 'Oxygen' is written.




Cheers