CB Radio interference

I had the same problem about 20 years ago.The offending party lived about a block away.Fortunately he died.I still say I had nothing to do with that.You could check phono stage tubes to see if they are microphonic.I use 6dj8 which tend towards that problem.

Now you know why the rents are cheaper in Brooklyn. What kind of building do you live in? Is it pre war?

These can be tough issues to trouble shoot. The above posters offer some
good suggestions. Sometimes you gotta move (...yeah I know)

One question...is the phono stage next to a window? That may
"leak" RFI more so than a wall...

You might try something like this...several vendors have versions of this:

http://www.newark.com/ferrishield/sf005pcn-ca/emi-rfi-shielding-fabric-
82db/dp/02M1762

I just googled rfi shielding ... here's a rfi tent ;)

http://www.fine-silver-productsnet.com/70te24inx24i.html

Yes a metal cage of conducting metal such as copper for example shouldf help block the unwanted signal. The cage is called a Farraday cage, I think.

Casey33: "Fortunately he died.I still say I had nothing to do with that". That is a good one!

I had experienced a one time similar occurance . While playing a CD, a few transmissions came through EXTREMELY loud and clear!
Judging by conversation, the sender was mobile and one block away, passing through town.