Old house, bad sound ?!

My Fender Blues Junior is making a "hum" sound when i'm switching it on.
As it is almost new - i brought it back to the store.
The tech tried it and... surprise surprise it's working well there! (and i'm looking like a fool).
He told me that it could be related to the fact that i'm living in an old house (old connections, old cable, lack of voltage).

It still does not work properly when i plug it in here... (lack of power, buzz sound)

What to do?! (apart moving house :)
Someone ever had that problem?

Thanks,

Edit: Sorry if this isn't posted in the right place!

I had that problem once with a GK bass amp.

We took several trips to the store before we believed them that it was a problem with our electricity.

In this case, the amp had a switch to set it on "low power" or something like that, and it wouldn't hum at that setting.

You might try different outlets as well? Long shot: surge supressor?


Good luck!

I think everyone should have a decent meter, and know how to use it.

You could measure the line voltage at your place and compare that to the voltage at the shop.

I suspect it would have to be quite a bit lower at your house to cause this trouble, but it is a possibility.

A long time ago in my 'not so bright' days (...I'm making a far reaching assumption that I've changed ;) ), I had a hum issue. I did the same thing, brought it to the store and no hum. Brought it back home and re-set it up. Hum. I set it up exactly the way I did before I went to the store.

'Exactly' meant that I went home and set the effects up the same way (a Turbo OD and Wah)....That is to say that, again, I set them on top of the amp. I used the wah but when practicing; most of the time, no. I put them on top cuz my room wasn't that big.

You see where this is going...I took them off the top to look at the back (while plugged in) and lo and behold....Yes, you guessed it, no buzz.

Moral of the story, take everything away from the amp like clocks, tuners, effects and just plug in to the amp and stand a ways away with the guitar. Buzz still? Also, if it buzzes when no guitar is plugged in, sometimes it's the cable. If it's an old house, is the outlet a grounded (three pronged) outlet?

This kind of stuff. Just throwin' it out there.

Thanks everyone.

Someone told me to try plugging it without the ground - didn't helped (3 pronged).

I tried to shut down everything in the whole house to see if it could be it - didn't change anything.

I'm gonna try the meter soon too.

Aw well this is quite frustrating.

I was just wondering if the power supply to your house and socket's are earthed ?
Could you try it in another house

try flipping the plug if you can some old amps had a reverse polarity problem also some times it may be your guitar cord or guitar connection that is causing i have found that it it is most of the time a bad ground that causae buzzing been playing since the 1970 s and own both fender and marshall amps also newer crate amps but the older (tube) amps tend to be more subject to buzzing also have had some guitars that caused it with bad wiring (ground also )